Merge remote-tracking branch 'upstream/dev' into plugin-repo

Zotlabs/Module/Admin.php

@@ -230,6 +230,12 @@ class Admin extends \Zotlabs\Web\Controller {
 				. ' A list about current PHP versions can be found <a href="http://php.net/supported-versions.php" class="alert-link">here</a>.';
 		}
 
+		$vmaster = get_repository_version('master');
+		$vdev = get_repository_version('dev');
+
+		$upgrade = ((version_compare(STD_VERSION,$vmaster) < 0) ? t('Your software should be updated') : '');
+
+
 		$t = get_markup_template('admin_summary.tpl');
 		return replace_macros($t, array(
 			'$title' => t('Administration'),
@@ -241,6 +247,9 @@ class Admin extends \Zotlabs\Web\Controller {
 			'$channels' => array( t('Registered channels'), $channels),
 			'$plugins'  => array( t('Active plugins'), $plugins ),
 			'$version'  => array( t('Version'), STD_VERSION),
+			'$vmaster'  => array( t('Repository version (master)'), $vmaster),
+			'$vdev'     => array( t('Repository version (dev)'), $vdev),
+			'$upgrade'  => $upgrade,
 			'$build' => get_config('system', 'db_version')
 		));
 	}

Zotlabs/Module/Cloud.php

@@ -90,7 +90,6 @@ class Cloud extends \Zotlabs\Web\Controller {
 			}
 		}
 	
-	//	require_once('\Zotlabs/Storage/Browser.php');
 		// provide a directory view for the cloud in Hubzilla
 		$browser = new \Zotlabs\Storage\Browser($auth);
 		$auth->setBrowserPlugin($browser);

Zotlabs/Module/Dav.php

@@ -60,38 +60,53 @@ class Dav extends \Zotlabs\Web\Controller {
 		if ($which)
 			profile_load($a, $which, $profile);
 	
+
+
+
 		$auth = new \Zotlabs\Storage\BasicAuth();
 
-		$ob_hash = get_observer_hash();
+//		$authBackend = new \Sabre\DAV\Auth\Backend\BasicCallBack(function($userName,$password) {
+//			if(account_verify_password($userName,$password))
+//				return true;
+//			return false;
+//		});
 
-		if ($ob_hash) {
-			if (local_channel()) {
-				$channel = \App::get_channel();
-				$auth->setCurrentUser($channel['channel_address']);
-				$auth->channel_id = $channel['channel_id'];
-				$auth->channel_hash = $channel['channel_hash'];
-				$auth->channel_account_id = $channel['channel_account_id'];
-				if($channel['channel_timezone'])
-					$auth->setTimezone($channel['channel_timezone']);
-			}
-			$auth->observer = $ob_hash;
-		}
+//		$ob_hash = get_observer_hash();
 	
-		if ($_GET['davguest'])
-			$_SESSION['davguest'] = true;
+//		if ($ob_hash) {
+//			if (local_channel()) {
+//				$channel = \App::get_channel();
+//				$auth->setCurrentUser($channel['channel_address']);
+//				$auth->channel_id = $channel['channel_id'];
+//				$auth->channel_hash = $channel['channel_hash'];
+//				$auth->channel_account_id = $channel['channel_account_id'];
+//				if($channel['channel_timezone'])
+//					$auth->setTimezone($channel['channel_timezone']);
+//			}
+//			$auth->observer = $ob_hash;
+//		}
 	
-		$_SERVER['QUERY_STRING'] = str_replace(array('?f=', '&f='), array('', ''), $_SERVER['QUERY_STRING']);
-		$_SERVER['QUERY_STRING'] = strip_zids($_SERVER['QUERY_STRING']);
-		$_SERVER['QUERY_STRING'] = preg_replace('/[\?&]davguest=(.*?)([\?&]|$)/ism', '', $_SERVER['QUERY_STRING']);
+//		if ($_GET['davguest'])
+//			$_SESSION['davguest'] = true;
 	
-		$_SERVER['REQUEST_URI'] = str_replace(array('?f=', '&f='), array('', ''), $_SERVER['REQUEST_URI']);
-		$_SERVER['REQUEST_URI'] = strip_zids($_SERVER['REQUEST_URI']);
-		$_SERVER['REQUEST_URI'] = preg_replace('/[\?&]davguest=(.*?)([\?&]|$)/ism', '', $_SERVER['REQUEST_URI']);
+//		$_SERVER['QUERY_STRING'] = str_replace(array('?f=', '&f='), array('', ''), $_SERVER['QUERY_STRING']);
+//		$_SERVER['QUERY_STRING'] = strip_zids($_SERVER['QUERY_STRING']);
+//		$_SERVER['QUERY_STRING'] = preg_replace('/[\?&]davguest=(.*?)([\?&]|$)/ism', '', $_SERVER['QUERY_STRING']);
+//	
+//		$_SERVER['REQUEST_URI'] = str_replace(array('?f=', '&f='), array('', ''), $_SERVER['REQUEST_URI']);
+//		$_SERVER['REQUEST_URI'] = strip_zids($_SERVER['REQUEST_URI']);
+//		$_SERVER['REQUEST_URI'] = preg_replace('/[\?&]davguest=(.*?)([\?&]|$)/ism', '', $_SERVER['REQUEST_URI']);
 	
 		$rootDirectory = new \Zotlabs\Storage\Directory('/', $auth);
 	
 		// A SabreDAV server-object
 		$server = new SDAV\Server($rootDirectory);
+
+
+		$authPlugin = new \Sabre\DAV\Auth\Plugin($auth);
+		$server->addPlugin($authPlugin);
+
+
 		// prevent overwriting changes each other with a lock backend
 		$lockBackend = new SDAV\Locks\Backend\File('store/[data]/locks');
 		$lockPlugin = new SDAV\Locks\Plugin($lockBackend);
@@ -108,29 +123,29 @@ class Dav extends \Zotlabs\Web\Controller {
 		// In order to avoid prompting for passwords for viewing a DIRECTORY, add
 		// the URL query parameter 'davguest=1'.
 	
-		$isapublic_file = false;
-		$davguest = ((x($_SESSION, 'davguest')) ? true : false);
+//		$isapublic_file = false;
+//		$davguest = ((x($_SESSION, 'davguest')) ? true : false);
 	
-		if ((! $auth->observer) && ($_SERVER['REQUEST_METHOD'] === 'GET')) {
-			try { 
-				$x = RedFileData('/' . \App::$cmd, $auth);
-				if($x instanceof \Zotlabs\Storage\File)
-					$isapublic_file = true;
-			}
-			catch (Exception $e) {
-				$isapublic_file = false;
-			}
-		}
+//		if ((! $auth->observer) && ($_SERVER['REQUEST_METHOD'] === 'GET')) {
+//			try { 
+//				$x = RedFileData('/' . \App::$cmd, $auth);
+//				if($x instanceof \Zotlabs\Storage\File)
+//					$isapublic_file = true;
+//			}
+//			catch (Exception $e) {
+//				$isapublic_file = false;
+//			}
+//		}
 	
-		if ((! $auth->observer) && (! $isapublic_file) && (! $davguest)) {
-			try {
-				$auth->Authenticate($server, t('$Projectname channel'));
-			}
-			catch (Exception $e) {
-				logger('mod_cloud: auth exception' . $e->getMessage());
-				http_status_exit($e->getHTTPCode(), $e->getMessage());
-			}
-		}
+//		if ((! $auth->observer) && (! $isapublic_file) && (! $davguest)) {
+//			try {
+//				$auth->Authenticate($server, t('$Projectname channel'));
+//			}
+//			catch (Exception $e) {
+//				logger('mod_cloud: auth exception' . $e->getMessage());
+//				http_status_exit($e->getHTTPCode(), $e->getMessage());
+//			}
+//		}
 	
 	//	require_once('Zotlabs/Storage/Browser.php');
 		// provide a directory view for the cloud in Hubzilla

Zotlabs/Storage/BasicAuth.php

@@ -84,10 +84,6 @@ class BasicAuth extends DAV\Auth\Backend\AbstractBasic {
 	 * @return bool
 	 */
 	protected function validateUserPass($username, $password) {
-		if (trim($password) === '+++') {
-			logger('guest: ' . $username);
-			return true;
-		}
 
 		require_once('include/auth.php');
 		$record = account_verify_password($username, $password);

Zotlabs/Storage/Browser.php

@@ -101,8 +101,8 @@ class Browser extends DAV\Browser\Plugin {
 		$parentpath = array();
 		// only show parent if not leaving /cloud/; TODO how to improve this? 
 		if ($path && $path != "cloud") {
-			list($parentUri) = DAV\URLUtil::splitPath($path);
-			$fullPath = DAV\URLUtil::encodePath($this->server->getBaseUri() . $parentUri);
+			list($parentUri) = \Sabre\HTTP\URLUtil::splitPath($path);
+			$fullPath = \Sabre\HTTP\URLUtil::encodePath($this->server->getBaseUri() . $parentUri);
 
 			$parentpath['icon'] = $this->enableAssets ? '<a href="' . $fullPath . '"><img src="' . $this->getAssetUrl('icons/parent' . $this->iconExtension) . '" width="24" alt="' . t('parent') . '"></a>' : '';
 			$parentpath['path'] = $fullPath;
@@ -116,7 +116,7 @@ class Browser extends DAV\Browser\Plugin {
 			// This is the current directory, we can skip it
 			if (rtrim($file['href'],'/') == $path) continue;
 
-			list(, $name) = DAV\URLUtil::splitPath($file['href']);
+			list(, $name) = \Sabre\HTTP\URLUtil::splitPath($file['href']);
 
 			if (isset($file[200]['{DAV:}resourcetype'])) {
 				$type = $file[200]['{DAV:}resourcetype']->getValue();
@@ -166,7 +166,7 @@ class Browser extends DAV\Browser\Plugin {
 			$size = isset($file[200]['{DAV:}getcontentlength']) ? (int)$file[200]['{DAV:}getcontentlength'] : '';
 			$lastmodified = ((isset($file[200]['{DAV:}getlastmodified'])) ? $file[200]['{DAV:}getlastmodified']->getTime()->format('Y-m-d H:i:s') : '');
 
-			$fullPath = DAV\URLUtil::encodePath('/' . trim($this->server->getBaseUri() . ($path ? $path . '/' : '') . $name, '/'));
+			$fullPath = \Sabre\HTTP\URLUtil::encodePath('/' . trim($this->server->getBaseUri() . ($path ? $path . '/' : '') . $name, '/'));
 
 
 			$displayName = isset($file[200]['{DAV:}displayname']) ? $file[200]['{DAV:}displayname'] : $name;
@@ -219,7 +219,7 @@ class Browser extends DAV\Browser\Plugin {
 
 		$output = '';
 		if ($this->enablePost) {
-			$this->server->broadcastEvent('onHTMLActionsPanel', array($parent, &$output));
+			$this->server->emit('onHTMLActionsPanel', array($parent, &$output));
 		}
 
 		$html .= replace_macros(get_markup_template('cloud.tpl'), array(

include/event.php

@@ -536,20 +536,10 @@ function event_import_ical($ical, $uid) {
 	}
 
 	$dtstart = $ical->DTSTART->getDateTime();
+	$ev['adjust'] = (($ical->DTSTART->isFloating()) ? 1 : 0);
 
 //	logger('dtstart: ' . var_export($dtstart,true));
 
-
-	switch($dtstart->timezone_type) {
-		case VObject\Property\DateTime::UTC :
-			$ev['adjust'] = 0;
-			break;
-		case VObject\Property\DateTime::LOCALTZ :
-		default:
-			$ev['adjust'] = 1;
-			break;
-	}
-
 	$ev['start'] = datetime_convert((($ev['adjust']) ? 'UTC' : date_default_timezone_get()),'UTC',
 		$dtstart->format(\DateTime::W3C));
 

include/network.php

@@ -2128,3 +2128,18 @@ function deliverable_singleton($channel_id,$xchan) {
 	return false;
 }
 
+
+
+function get_repository_version($branch = 'master') {
+
+	$path = "https://raw.githubusercontent.com/redmatrix/hubzilla/$branch/boot.php";
+	
+	$x = z_fetch_url($path);
+	if($x['success']) {
+		$y = preg_match('/define(.*?)STD_VERSION(.*?)([0-9.].*)\'/',$x['body'],$matches);
+		if($y)
+			return $matches[3];
+	}
+	return '?.?';
+
+}		

vendor/autoload.php

@@ -4,4 +4,4 @@
 
 require_once __DIR__ . '/composer' . '/autoload_real.php';
 
-return ComposerAutoloaderInita478c0bdc9041edcc4f485e8fb39b90d::getLoader();
+return ComposerAutoloaderInit85a1cefa95be2f464cf7f947cbc4c785::getLoader();

vendor/bin/generate_vcards

@@ -0,0 +1 @@
+../sabre/vobject/bin/generate_vcards

vendor/bin/naturalselection

@@ -0,0 +1 @@
+../sabre/dav/bin/naturalselection

vendor/bin/sabredav

@@ -0,0 +1 @@
+../sabre/dav/bin/sabredav

vendor/bin/vobject

@@ -0,0 +1 @@
+../sabre/vobject/bin/vobject

vendor/composer/ClassLoader.php

@@ -13,9 +13,7 @@
 namespace Composer\Autoload;
 
 /**
- * ClassLoader implements a PSR-0 class loader
- *
- * See https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-0.md
+ * ClassLoader implements a PSR-0, PSR-4 and classmap class loader.
  *
  *     $loader = new \Composer\Autoload\ClassLoader();
  *
@@ -39,6 +37,8 @@ namespace Composer\Autoload;
  *
  * @author Fabien Potencier <fabien@symfony.com>
  * @author Jordi Boggiano <j.boggiano@seld.be>
+ * @see    http://www.php-fig.org/psr/psr-0/
+ * @see    http://www.php-fig.org/psr/psr-4/
  */
 class ClassLoader
 {
@@ -54,11 +54,17 @@ class ClassLoader
     private $useIncludePath = false;
     private $classMap = array();
 
+    private $classMapAuthoritative = false;
+
     public function getPrefixes()
     {
+        if (!empty($this->prefixesPsr0)) {
             return call_user_func_array('array_merge', $this->prefixesPsr0);
         }
 
+        return array();
+    }
+
     public function getPrefixesPsr4()
     {
         return $this->prefixDirsPsr4;
@@ -141,8 +147,10 @@ class ClassLoader
      * appending or prepending to the ones previously set for this namespace.
      *
      * @param string       $prefix  The prefix/namespace, with trailing '\\'
-     * @param array|string $paths   The PSR-0 base directories
+     * @param array|string $paths   The PSR-4 base directories
      * @param bool         $prepend Whether to prepend the directories
+     *
+     * @throws \InvalidArgumentException
      */
     public function addPsr4($prefix, $paths, $prepend = false)
     {
@@ -204,6 +212,8 @@ class ClassLoader
      *
      * @param string       $prefix The prefix/namespace, with trailing '\\'
      * @param array|string $paths  The PSR-4 base directories
+     *
+     * @throws \InvalidArgumentException
      */
     public function setPsr4($prefix, $paths)
     {
@@ -240,6 +250,27 @@ class ClassLoader
         return $this->useIncludePath;
     }
 
+    /**
+     * Turns off searching the prefix and fallback directories for classes
+     * that have not been registered with the class map.
+     *
+     * @param bool $classMapAuthoritative
+     */
+    public function setClassMapAuthoritative($classMapAuthoritative)
+    {
+        $this->classMapAuthoritative = $classMapAuthoritative;
+    }
+
+    /**
+     * Should class lookup fail if not found in the current class map?
+     *
+     * @return bool
+     */
+    public function isClassMapAuthoritative()
+    {
+        return $this->classMapAuthoritative;
+    }
+
     /**
      * Registers this instance as an autoloader.
      *
@@ -291,6 +322,9 @@ class ClassLoader
         if (isset($this->classMap[$class])) {
             return $this->classMap[$class];
         }
+        if ($this->classMapAuthoritative) {
+            return false;
+        }
 
         $file = $this->findFileWithExtension($class, '.php');
 

vendor/composer/LICENSE

@@ -0,0 +1,21 @@
+
+Copyright (c) 2016 Nils Adermann, Jordi Boggiano
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is furnished
+to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+

vendor/composer/autoload_files.php

@@ -0,0 +1,16 @@
+<?php
+
+// autoload_files.php @generated by Composer
+
+$vendorDir = dirname(dirname(__FILE__));
+$baseDir = dirname($vendorDir);
+
+return array(
+    '383eaff206634a77a1be54e64e6459c7' => $vendorDir . '/sabre/uri/lib/functions.php',
+    '2b9d0f43f9552984cfa82fee95491826' => $vendorDir . '/sabre/event/lib/coroutine.php',
+    'd81bab31d3feb45bfe2f283ea3c8fdf7' => $vendorDir . '/sabre/event/lib/Loop/functions.php',
+    'a1cce3d26cc15c00fcd0b3354bd72c88' => $vendorDir . '/sabre/event/lib/Promise/functions.php',
+    '3569eecfeed3bcf0bad3c998a494ecb8' => $vendorDir . '/sabre/xml/lib/Deserializer/functions.php',
+    '93aa591bc4ca510c520999e34229ee79' => $vendorDir . '/sabre/xml/lib/Serializer/functions.php',
+    'ebdb698ed4152ae445614b69b5e4bb6a' => $vendorDir . '/sabre/http/lib/functions.php',
+);

vendor/composer/autoload_namespaces.php

@@ -6,10 +6,4 @@ $vendorDir = dirname(dirname(__FILE__));
 $baseDir = dirname($vendorDir);
 
 return array(
-    'Sabre\\VObject' => array($vendorDir . '/sabre/vobject/lib'),
-    'Sabre\\HTTP' => array($vendorDir . '/sabre/dav/lib'),
-    'Sabre\\DAVACL' => array($vendorDir . '/sabre/dav/lib'),
-    'Sabre\\DAV' => array($vendorDir . '/sabre/dav/lib'),
-    'Sabre\\CardDAV' => array($vendorDir . '/sabre/dav/lib'),
-    'Sabre\\CalDAV' => array($vendorDir . '/sabre/dav/lib'),
 );

vendor/composer/autoload_psr4.php

@@ -6,4 +6,13 @@ $vendorDir = dirname(dirname(__FILE__));
 $baseDir = dirname($vendorDir);
 
 return array(
+    'Sabre\\Xml\\' => array($vendorDir . '/sabre/xml/lib'),
+    'Sabre\\VObject\\' => array($vendorDir . '/sabre/vobject/lib'),
+    'Sabre\\Uri\\' => array($vendorDir . '/sabre/uri/lib'),
+    'Sabre\\HTTP\\' => array($vendorDir . '/sabre/http/lib'),
+    'Sabre\\Event\\' => array($vendorDir . '/sabre/event/lib'),
+    'Sabre\\DAV\\' => array($vendorDir . '/sabre/dav/lib/DAV'),
+    'Sabre\\DAVACL\\' => array($vendorDir . '/sabre/dav/lib/DAVACL'),
+    'Sabre\\CardDAV\\' => array($vendorDir . '/sabre/dav/lib/CardDAV'),
+    'Sabre\\CalDAV\\' => array($vendorDir . '/sabre/dav/lib/CalDAV'),
 );

vendor/composer/autoload_real.php

@@ -2,7 +2,7 @@
 
 // autoload_real.php @generated by Composer
 
-class ComposerAutoloaderInita478c0bdc9041edcc4f485e8fb39b90d
+class ComposerAutoloaderInit85a1cefa95be2f464cf7f947cbc4c785
 {
     private static $loader;
 
@@ -19,10 +19,16 @@ class ComposerAutoloaderInita478c0bdc9041edcc4f485e8fb39b90d
             return self::$loader;
         }
 
-        spl_autoload_register(array('ComposerAutoloaderInita478c0bdc9041edcc4f485e8fb39b90d', 'loadClassLoader'), true, true);
+        spl_autoload_register(array('ComposerAutoloaderInit85a1cefa95be2f464cf7f947cbc4c785', 'loadClassLoader'), true, true);
         self::$loader = $loader = new \Composer\Autoload\ClassLoader();
-        spl_autoload_unregister(array('ComposerAutoloaderInita478c0bdc9041edcc4f485e8fb39b90d', 'loadClassLoader'));
+        spl_autoload_unregister(array('ComposerAutoloaderInit85a1cefa95be2f464cf7f947cbc4c785', 'loadClassLoader'));
 
+        $useStaticLoader = PHP_VERSION_ID >= 50600 && !defined('HHVM_VERSION');
+        if ($useStaticLoader) {
+            require_once __DIR__ . '/autoload_static.php';
+
+            call_user_func(\Composer\Autoload\ComposerStaticInit85a1cefa95be2f464cf7f947cbc4c785::getInitializer($loader));
+        } else {
             $map = require __DIR__ . '/autoload_namespaces.php';
             foreach ($map as $namespace => $path) {
                 $loader->set($namespace, $path);
@@ -37,14 +43,28 @@ class ComposerAutoloaderInita478c0bdc9041edcc4f485e8fb39b90d
             if ($classMap) {
                 $loader->addClassMap($classMap);
             }
+        }
 
         $loader->register(true);
 
+        if ($useStaticLoader) {
+            $includeFiles = Composer\Autoload\ComposerStaticInit85a1cefa95be2f464cf7f947cbc4c785::$files;
+        } else {
+            $includeFiles = require __DIR__ . '/autoload_files.php';
+        }
+        foreach ($includeFiles as $fileIdentifier => $file) {
+            composerRequire85a1cefa95be2f464cf7f947cbc4c785($fileIdentifier, $file);
+        }
+
         return $loader;
     }
 }
 
-function composerRequirea478c0bdc9041edcc4f485e8fb39b90d($file)
+function composerRequire85a1cefa95be2f464cf7f947cbc4c785($fileIdentifier, $file)
 {
+    if (empty($GLOBALS['__composer_autoload_files'][$fileIdentifier])) {
         require $file;
+
+        $GLOBALS['__composer_autoload_files'][$fileIdentifier] = true;
+    }
 }

vendor/composer/autoload_static.php

@@ -0,0 +1,81 @@
+<?php
+
+// autoload_static.php @generated by Composer
+
+namespace Composer\Autoload;
+
+class ComposerStaticInit85a1cefa95be2f464cf7f947cbc4c785
+{
+    public static $files = array (
+        '383eaff206634a77a1be54e64e6459c7' => __DIR__ . '/..' . '/sabre/uri/lib/functions.php',
+        '2b9d0f43f9552984cfa82fee95491826' => __DIR__ . '/..' . '/sabre/event/lib/coroutine.php',
+        'd81bab31d3feb45bfe2f283ea3c8fdf7' => __DIR__ . '/..' . '/sabre/event/lib/Loop/functions.php',
+        'a1cce3d26cc15c00fcd0b3354bd72c88' => __DIR__ . '/..' . '/sabre/event/lib/Promise/functions.php',
+        '3569eecfeed3bcf0bad3c998a494ecb8' => __DIR__ . '/..' . '/sabre/xml/lib/Deserializer/functions.php',
+        '93aa591bc4ca510c520999e34229ee79' => __DIR__ . '/..' . '/sabre/xml/lib/Serializer/functions.php',
+        'ebdb698ed4152ae445614b69b5e4bb6a' => __DIR__ . '/..' . '/sabre/http/lib/functions.php',
+    );
+
+    public static $prefixLengthsPsr4 = array (
+        'S' => 
+        array (
+            'Sabre\\Xml\\' => 10,
+            'Sabre\\VObject\\' => 14,
+            'Sabre\\Uri\\' => 10,
+            'Sabre\\HTTP\\' => 11,
+            'Sabre\\Event\\' => 12,
+            'Sabre\\DAV\\' => 10,
+            'Sabre\\DAVACL\\' => 13,
+            'Sabre\\CardDAV\\' => 14,
+            'Sabre\\CalDAV\\' => 13,
+        ),
+    );
+
+    public static $prefixDirsPsr4 = array (
+        'Sabre\\Xml\\' => 
+        array (
+            0 => __DIR__ . '/..' . '/sabre/xml/lib',
+        ),
+        'Sabre\\VObject\\' => 
+        array (
+            0 => __DIR__ . '/..' . '/sabre/vobject/lib',
+        ),
+        'Sabre\\Uri\\' => 
+        array (
+            0 => __DIR__ . '/..' . '/sabre/uri/lib',
+        ),
+        'Sabre\\HTTP\\' => 
+        array (
+            0 => __DIR__ . '/..' . '/sabre/http/lib',
+        ),
+        'Sabre\\Event\\' => 
+        array (
+            0 => __DIR__ . '/..' . '/sabre/event/lib',
+        ),
+        'Sabre\\DAV\\' => 
+        array (
+            0 => __DIR__ . '/..' . '/sabre/dav/lib/DAV',
+        ),
+        'Sabre\\DAVACL\\' => 
+        array (
+            0 => __DIR__ . '/..' . '/sabre/dav/lib/DAVACL',
+        ),
+        'Sabre\\CardDAV\\' => 
+        array (
+            0 => __DIR__ . '/..' . '/sabre/dav/lib/CardDAV',
+        ),
+        'Sabre\\CalDAV\\' => 
+        array (
+            0 => __DIR__ . '/..' . '/sabre/dav/lib/CalDAV',
+        ),
+    );
+
+    public static function getInitializer(ClassLoader $loader)
+    {
+        return \Closure::bind(function () use ($loader) {
+            $loader->prefixLengthsPsr4 = ComposerStaticInit85a1cefa95be2f464cf7f947cbc4c785::$prefixLengthsPsr4;
+            $loader->prefixDirsPsr4 = ComposerStaticInit85a1cefa95be2f464cf7f947cbc4c785::$prefixDirsPsr4;
+
+        }, null, ClassLoader::class);
+    }
+}

vendor/composer/installed.json

@@ -1,32 +1,35 @@
 [
     {
-        "name": "sabre/vobject",
-        "version": "2.1.4",
-        "version_normalized": "2.1.4.0",
+        "name": "sabre/uri",
+        "version": "1.1.0",
+        "version_normalized": "1.1.0.0",
         "source": {
             "type": "git",
-            "url": "https://github.com/fruux/sabre-vobject.git",
-            "reference": "199b6ec87104b05e3013dfd5b90eafbbe4cf97dc"
+            "url": "https://github.com/fruux/sabre-uri.git",
+            "reference": "9012116434d84ef6e5e37a89dfdbfbe2204a8704"
         },
         "dist": {
             "type": "zip",
-            "url": "https://api.github.com/repos/fruux/sabre-vobject/zipball/199b6ec87104b05e3013dfd5b90eafbbe4cf97dc",
-            "reference": "199b6ec87104b05e3013dfd5b90eafbbe4cf97dc",
+            "url": "https://api.github.com/repos/fruux/sabre-uri/zipball/9012116434d84ef6e5e37a89dfdbfbe2204a8704",
+            "reference": "9012116434d84ef6e5e37a89dfdbfbe2204a8704",
             "shasum": ""
         },
         "require": {
-            "ext-mbstring": "*",
-            "php": ">=5.3.1"
+            "php": ">=5.4.7"
         },
-        "time": "2014-03-30 23:01:06",
-        "bin": [
-            "bin/vobjectvalidate.php"
-        ],
+        "require-dev": {
+            "phpunit/phpunit": "*",
+            "sabre/cs": "~0.0.1"
+        },
+        "time": "2016-03-08 02:29:27",
         "type": "library",
         "installation-source": "dist",
         "autoload": {
-            "psr-0": {
-                "Sabre\\VObject": "lib/"
+            "files": [
+                "lib/functions.php"
+            ],
+            "psr-4": {
+                "Sabre\\Uri\\": "lib/"
             }
         },
         "notification-url": "https://packagist.org/downloads/",
@@ -36,32 +39,310 @@
         "authors": [
             {
                 "name": "Evert Pot",
-                "email": "evert@rooftopsolutions.nl",
+                "email": "me@evertpot.com",
                 "homepage": "http://evertpot.com/",
                 "role": "Developer"
             }
         ],
-        "description": "The VObject library for PHP allows you to easily parse and manipulate iCalendar and vCard objects",
-        "homepage": "https://github.com/fruux/sabre-vobject",
+        "description": "Functions for making sense out of URIs.",
+        "homepage": "http://sabre.io/uri/",
         "keywords": [
-            "VObject",
+            "rfc3986",
+            "uri",
+            "url"
+        ]
+    },
+    {
+        "name": "sabre/event",
+        "version": "3.0.0",
+        "version_normalized": "3.0.0.0",
+        "source": {
+            "type": "git",
+            "url": "https://github.com/fruux/sabre-event.git",
+            "reference": "831d586f5a442dceacdcf5e9c4c36a4db99a3534"
+        },
+        "dist": {
+            "type": "zip",
+            "url": "https://api.github.com/repos/fruux/sabre-event/zipball/831d586f5a442dceacdcf5e9c4c36a4db99a3534",
+            "reference": "831d586f5a442dceacdcf5e9c4c36a4db99a3534",
+            "shasum": ""
+        },
+        "require": {
+            "php": ">=5.5"
+        },
+        "require-dev": {
+            "phpunit/phpunit": "*",
+            "sabre/cs": "~0.0.4"
+        },
+        "time": "2015-11-05 20:14:39",
+        "type": "library",
+        "installation-source": "dist",
+        "autoload": {
+            "psr-4": {
+                "Sabre\\Event\\": "lib/"
+            },
+            "files": [
+                "lib/coroutine.php",
+                "lib/Loop/functions.php",
+                "lib/Promise/functions.php"
+            ]
+        },
+        "notification-url": "https://packagist.org/downloads/",
+        "license": [
+            "BSD-3-Clause"
+        ],
+        "authors": [
+            {
+                "name": "Evert Pot",
+                "email": "me@evertpot.com",
+                "homepage": "http://evertpot.com/",
+                "role": "Developer"
+            }
+        ],
+        "description": "sabre/event is a library for lightweight event-based programming",
+        "homepage": "http://sabre.io/event/",
+        "keywords": [
+            "EventEmitter",
+            "async",
+            "events",
+            "hooks",
+            "plugin",
+            "promise",
+            "signal"
+        ]
+    },
+    {
+        "name": "sabre/http",
+        "version": "4.2.1",
+        "version_normalized": "4.2.1.0",
+        "source": {
+            "type": "git",
+            "url": "https://github.com/fruux/sabre-http.git",
+            "reference": "2e93bc8321524c67be4ca5b8415daebd4c8bf85e"
+        },
+        "dist": {
+            "type": "zip",
+            "url": "https://api.github.com/repos/fruux/sabre-http/zipball/2e93bc8321524c67be4ca5b8415daebd4c8bf85e",
+            "reference": "2e93bc8321524c67be4ca5b8415daebd4c8bf85e",
+            "shasum": ""
+        },
+        "require": {
+            "ext-mbstring": "*",
+            "php": ">=5.4",
+            "sabre/event": ">=1.0.0,<4.0.0",
+            "sabre/uri": "~1.0"
+        },
+        "require-dev": {
+            "phpunit/phpunit": "~4.3",
+            "sabre/cs": "~0.0.1"
+        },
+        "suggest": {
+            "ext-curl": " to make http requests with the Client class"
+        },
+        "time": "2016-01-06 23:00:08",
+        "type": "library",
+        "installation-source": "dist",
+        "autoload": {
+            "files": [
+                "lib/functions.php"
+            ],
+            "psr-4": {
+                "Sabre\\HTTP\\": "lib/"
+            }
+        },
+        "notification-url": "https://packagist.org/downloads/",
+        "license": [
+            "BSD-3-Clause"
+        ],
+        "authors": [
+            {
+                "name": "Evert Pot",
+                "email": "me@evertpot.com",
+                "homepage": "http://evertpot.com/",
+                "role": "Developer"
+            }
+        ],
+        "description": "The sabre/http library provides utilities for dealing with http requests and responses. ",
+        "homepage": "https://github.com/fruux/sabre-http",
+        "keywords": [
+            "http"
+        ]
+    },
+    {
+        "name": "sabre/xml",
+        "version": "1.4.1",
+        "version_normalized": "1.4.1.0",
+        "source": {
+            "type": "git",
+            "url": "https://github.com/fruux/sabre-xml.git",
+            "reference": "59998046db252634259a878baf1af18159f508f3"
+        },
+        "dist": {
+            "type": "zip",
+            "url": "https://api.github.com/repos/fruux/sabre-xml/zipball/59998046db252634259a878baf1af18159f508f3",
+            "reference": "59998046db252634259a878baf1af18159f508f3",
+            "shasum": ""
+        },
+        "require": {
+            "ext-dom": "*",
+            "ext-xmlreader": "*",
+            "ext-xmlwriter": "*",
+            "lib-libxml": ">=2.6.20",
+            "php": ">=5.4.1",
+            "sabre/uri": "~1.0"
+        },
+        "require-dev": {
+            "phpunit/phpunit": "*",
+            "sabre/cs": "~0.0.2"
+        },
+        "time": "2016-03-12 22:23:16",
+        "type": "library",
+        "installation-source": "dist",
+        "autoload": {
+            "psr-4": {
+                "Sabre\\Xml\\": "lib/"
+            },
+            "files": [
+                "lib/Deserializer/functions.php",
+                "lib/Serializer/functions.php"
+            ]
+        },
+        "notification-url": "https://packagist.org/downloads/",
+        "license": [
+            "BSD-3-Clause"
+        ],
+        "authors": [
+            {
+                "name": "Evert Pot",
+                "email": "me@evertpot.com",
+                "homepage": "http://evertpot.com/",
+                "role": "Developer"
+            },
+            {
+                "name": "Markus Staab",
+                "email": "markus.staab@redaxo.de",
+                "role": "Developer"
+            }
+        ],
+        "description": "sabre/xml is an XML library that you may not hate.",
+        "homepage": "https://sabre.io/xml/",
+        "keywords": [
+            "XMLReader",
+            "XMLWriter",
+            "dom",
+            "xml"
+        ]
+    },
+    {
+        "name": "sabre/vobject",
+        "version": "4.1.0",
+        "version_normalized": "4.1.0.0",
+        "source": {
+            "type": "git",
+            "url": "https://github.com/fruux/sabre-vobject.git",
+            "reference": "8899c0e856b3178b17f4e9a4e85010209f32a2fa"
+        },
+        "dist": {
+            "type": "zip",
+            "url": "https://api.github.com/repos/fruux/sabre-vobject/zipball/8899c0e856b3178b17f4e9a4e85010209f32a2fa",
+            "reference": "8899c0e856b3178b17f4e9a4e85010209f32a2fa",
+            "shasum": ""
+        },
+        "require": {
+            "ext-mbstring": "*",
+            "php": ">=5.5",
+            "sabre/xml": "~1.1"
+        },
+        "require-dev": {
+            "phpunit/phpunit": "*",
+            "sabre/cs": "~0.0.3"
+        },
+        "suggest": {
+            "hoa/bench": "If you would like to run the benchmark scripts"
+        },
+        "time": "2016-04-07 00:48:27",
+        "bin": [
+            "bin/vobject",
+            "bin/generate_vcards"
+        ],
+        "type": "library",
+        "extra": {
+            "branch-alias": {
+                "dev-master": "4.0.x-dev"
+            }
+        },
+        "installation-source": "dist",
+        "autoload": {
+            "psr-4": {
+                "Sabre\\VObject\\": "lib/"
+            }
+        },
+        "notification-url": "https://packagist.org/downloads/",
+        "license": [
+            "BSD-3-Clause"
+        ],
+        "authors": [
+            {
+                "name": "Evert Pot",
+                "email": "me@evertpot.com",
+                "homepage": "http://evertpot.com/",
+                "role": "Developer"
+            },
+            {
+                "name": "Dominik Tobschall",
+                "email": "dominik@fruux.com",
+                "homepage": "http://tobschall.de/",
+                "role": "Developer"
+            },
+            {
+                "name": "Ivan Enderlin",
+                "email": "ivan.enderlin@hoa-project.net",
+                "homepage": "http://mnt.io/",
+                "role": "Developer"
+            }
+        ],
+        "description": "The VObject library for PHP allows you to easily parse and manipulate iCalendar and vCard objects",
+        "homepage": "http://sabre.io/vobject/",
+        "keywords": [
+            "availability",
+            "freebusy",
             "iCalendar",
-            "vCard"
+            "ics",
+            "jCal",
+            "jCard",
+            "recurrence",
+            "rfc2425",
+            "rfc2426",
+            "rfc2739",
+            "rfc4770",
+            "rfc5545",
+            "rfc5546",
+            "rfc6321",
+            "rfc6350",
+            "rfc6351",
+            "rfc6474",
+            "rfc6638",
+            "rfc6715",
+            "rfc6868",
+            "vCard",
+            "vcf",
+            "xCal",
+            "xCard"
         ]
     },
     {
         "name": "sabre/dav",
-        "version": "1.8.10",
-        "version_normalized": "1.8.10.0",
+        "version": "3.1.3",
+        "version_normalized": "3.1.3.0",
         "source": {
             "type": "git",
             "url": "https://github.com/fruux/sabre-dav.git",
-            "reference": "0d064536ed3c7974e486b6ebb5b17ad7a974fe18"
+            "reference": "8a266c7b5e140da79529414b9cde2a2d058b536b"
         },
         "dist": {
             "type": "zip",
-            "url": "https://api.github.com/repos/fruux/sabre-dav/zipball/0d064536ed3c7974e486b6ebb5b17ad7a974fe18",
-            "reference": "0d064536ed3c7974e486b6ebb5b17ad7a974fe18",
+            "url": "https://api.github.com/repos/fruux/sabre-dav/zipball/8a266c7b5e140da79529414b9cde2a2d058b536b",
+            "reference": "8a266c7b5e140da79529414b9cde2a2d058b536b",
             "shasum": ""
         },
         "require": {
@@ -69,39 +350,45 @@
             "ext-date": "*",
             "ext-dom": "*",
             "ext-iconv": "*",
-            "ext-libxml": "*",
             "ext-mbstring": "*",
             "ext-pcre": "*",
             "ext-simplexml": "*",
             "ext-spl": "*",
-            "php": ">=5.3.1",
-            "sabre/vobject": "~2.1.0"
-        },
-        "provide": {
-            "evert/sabredav": "1.7.*"
+            "lib-libxml": ">=2.7.0",
+            "php": ">=5.5.0",
+            "sabre/event": ">=2.0.0, <4.0.0",
+            "sabre/http": "^4.2.1",
+            "sabre/uri": "~1.0",
+            "sabre/vobject": "~4.0",
+            "sabre/xml": "~1.0"
         },
         "require-dev": {
-            "evert/phpdoc-md": "~0.0.7",
-            "phpunit/phpunit": "~4.0.0"
+            "evert/phpdoc-md": "~0.1.0",
+            "phpunit/phpunit": "> 4.8, <=6.0.0",
+            "sabre/cs": "~0.0.5"
         },
         "suggest": {
-            "ext-apc": "*",
             "ext-curl": "*",
             "ext-pdo": "*"
         },
-        "time": "2014-05-16 00:14:02",
+        "time": "2016-04-07 01:02:57",
         "bin": [
-            "bin/sabredav"
+            "bin/sabredav",
+            "bin/naturalselection"
         ],
         "type": "library",
+        "extra": {
+            "branch-alias": {
+                "dev-master": "3.1.0-dev"
+            }
+        },
         "installation-source": "dist",
         "autoload": {
-            "psr-0": {
-                "Sabre\\DAV": "lib/",
-                "Sabre\\HTTP": "lib/",
-                "Sabre\\DAVACL": "lib/",
-                "Sabre\\CalDAV": "lib/",
-                "Sabre\\CardDAV": "lib/"
+            "psr-4": {
+                "Sabre\\DAV\\": "lib/DAV/",
+                "Sabre\\DAVACL\\": "lib/DAVACL/",
+                "Sabre\\CalDAV\\": "lib/CalDAV/",
+                "Sabre\\CardDAV\\": "lib/CardDAV/"
             }
         },
         "notification-url": "https://packagist.org/downloads/",
@@ -117,7 +404,7 @@
             }
         ],
         "description": "WebDAV Framework for PHP",
-        "homepage": "http://code.google.com/p/sabredav/",
+        "homepage": "http://sabre.io/",
         "keywords": [
             "CalDAV",
             "CardDAV",

vendor/sabre/dav/.gitignore

@@ -1,22 +1,43 @@
-docs/api
-docs/wikidocs
-build.properties
-build
-public
-data
-fileserver.php
-fileserver2.php
-calendarserver.php
-groupwareserver.php
-package.xml
-tmpdata
+# Unit tests
 tests/temp
 tests/.sabredav
+tests/cov
+
+# Custom settings for tests
+tests/config.user.php
+
+# ViM
 *.swp
+
+# Composer
 composer.lock
 vendor
+
+# Composer binaries
 bin/phing
 bin/phpunit
-bin/vobjectvalidate.php
+bin/vobject
+bin/generate_vcards
 bin/phpdocmd
 bin/phpunit
+bin/php-cs-fixer
+bin/sabre-cs-fixer
+
+# Assuming every .php file in the root is for testing
+/*.php
+
+# Other testing stuff
+/tmpdata
+/data
+/public
+
+# Build
+build
+build.properties
+
+# Docs
+docs/api
+docs/wikidocs
+
+# Mac
+.DS_Store

vendor/sabre/dav/.travis.yml

@@ -1,28 +1,33 @@
 language: php
 php:
-  - 5.3.3
-  - 5.3
-  - 5.4
   - 5.5
   - 5.6
+  - 7
   - hhvm
 
 matrix:
+  fast_finish: true
   allow_failures:
-    - php: 5.6
       - php: hhvm
 
+env:
+  matrix:
+    - LOWEST_DEPS="" TEST_DEPS=""
+    - LOWEST_DEPS="--prefer-lowest" TEST_DEPS="tests/Sabre/"
+
 services:
   - mysql
 
+sudo: false
+
+cache: vendor
+
 before_script:
   - mysql -e 'create database sabredav'
-  - composer self-update
-  - composer install --prefer-source
-#  - echo "zend.enable_gc=0" >> `php --ini | grep "Loaded Configuration" | sed -e "s|.*:\s*||"`
+  #  - composer self-update
+  - composer update --prefer-source $LOWEST_DEPS
 
 script:
-  - phpunit --configuration tests/phpunit.xml
-  - cp tests/composer.vobject3.json composer.json
-  - composer update --no-dev
-  - phpunit --configuration tests/phpunit.xml
+  - ./bin/phpunit --configuration tests/phpunit.xml $TEST_DEPS
+  - ./bin/sabre-cs-fixer fix lib/ --dry-run --diff
+

vendor/sabre/dav/CONTRIBUTING.md

@@ -0,0 +1,87 @@
+Contributing to sabre projects
+==============================
+
+Want to contribute to sabre/dav? Here are some guidelines to ensure your patch
+gets accepted.
+
+
+Building a new feature? Contact us first
+----------------------------------------
+
+We may not want to accept every feature that comes our way. Sometimes
+features are out of scope for our projects.
+
+We don't want to waste your time, so by having a quick chat with us first,
+you may find out quickly if the feature makes sense to us, and we can give
+some tips on how to best build the feature.
+
+If we don't accept the feature, it could be for a number of reasons. For
+instance, we've rejected features in the past because we felt uncomfortable
+assuming responsibility for maintaining the feature.
+
+In those cases, it's often possible to keep the feature separate from the
+sabre projects. sabre/dav for instance has a plugin system, and there's no
+reason the feature can't live in a project you own.
+
+In that case, definitely let us know about your plugin as well, so we can
+feature it on [sabre.io][4].
+
+We are often on [IRC][5], in the #sabredav channel on freenode. If there's
+no one there, post a message on the [mailing list][6].
+
+
+Coding standards
+----------------
+
+sabre projects follow:
+
+1. [PSR-1][1]
+2. [PSR-4][2]
+
+sabre projects don't follow [PSR-2][3].
+
+In addition to that, here's a list of basic rules:
+
+1. PHP 5.4 array syntax must be used every where. This means you use `[` and
+   `]` instead of `array(` and `)`.
+2. Use PHP namespaces everywhere.
+3. Use 4 spaces for indentation.
+4. Try to keep your lines under 80 characters. This is not a hard rule, as
+   there are many places in the source where it felt more sensibile to not
+   do so. In particular, function declarations are never split over multiple
+   lines.
+5. Opening braces (`{`) are _always_ on the same line as the `class`, `if`,
+   `function`, etc. they belong to.
+6. `public` must be omitted from method declarations. It must also be omitted
+   for static properties.
+7. All files should use unix-line endings (`\n`).
+8. Files must omit the closing php tag (`?>`).
+9. `true`, `false` and `null` are always lower-case.
+10. Constants are always upper-case.
+11. Any of the rules stated before may be broken where this is the pragmatic
+    thing to do.
+
+
+Unit test requirements
+----------------------
+
+Any new feature or change requires unittests. We use [PHPUnit][7] for all our
+tests.
+
+Adding unittests will greatly increase the likelyhood of us quickly accepting
+your pull request. If unittests are not included though for whatever reason,
+we'd still _love_ your pull request.
+
+We may have to write the tests ourselves, which can increase the time it takes
+to accept the patch, but we'd still really like your contribution!
+
+To run the testsuite jump into the directory `cd tests` and trigger `phpunit`.
+Make sure you did a `composer install` beforehand.
+
+[1]: http://www.php-fig.org/psr/psr-1/
+[2]: http://www.php-fig.org/psr/psr-4/
+[3]: http://www.php-fig.org/psr/psr-2/
+[4]: http://sabre.io/
+[5]: irc://freenode.net/#sabredav
+[6]: http://groups.google.com/group/sabredav-discuss
+[7]: http://phpunit.de/

vendor/sabre/dav/LICENSE

@@ -1,4 +1,4 @@
-Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
+Copyright (C) 2007-2016 fruux GmbH (https://fruux.com/).
 
 All rights reserved.
 

vendor/sabre/dav/README.md

@@ -1,30 +1,29 @@
-# What is SabreDAV
+![sabre's logo](http://sabre.io/img/logo.png) SabreDAV
+======================================================
 
-SabreDAV allows you to easily add WebDAV support to a PHP application. SabreDAV is meant to cover the entire standard, and attempts to allow integration using an easy to understand API.
+Introduction
+------------
 
-### Feature list:
+SabreDAV is the most popular WebDAV framework for PHP. Use it to create WebDAV, CalDAV and CardDAV servers.
 
-* Fully WebDAV compliant
-* Supports Windows XP, Windows Vista, Mac OS/X, DavFSv2, Cadaver, Netdrive, Open Office, and probably more.
-* Passing all Litmus tests.
-* Supporting class 1, 2 and 3 Webdav servers.
-* Locking support.
-* Custom property support.
-* CalDAV (tested with [Evolution](http://code.google.com/p/sabredav/wiki/Evolution), [iCal](http://code.google.com/p/sabredav/wiki/ICal), [iPhone](http://code.google.com/p/sabredav/wiki/IPhone) and [Lightning](http://code.google.com/p/sabredav/wiki/Lightning)).
-* CardDAV (tested with [OS/X addressbook](http://code.google.com/p/sabredav/wiki/OSXAddressbook), the [iOS addressbook](http://code.google.com/p/sabredav/wiki/iOSCardDAV) and [Evolution](http://code.google.com/p/sabredav/wiki/Evolution)).
-* Over 97% unittest code coverage.
+Full documentation can be found on the website:
 
-### Supported RFC's:
+http://sabre.io/
 
-* [RFC2617](http://www.ietf.org/rfc/rfc2617.txt): Basic/Digest auth.
-* [RFC2518](http://www.ietf.org/rfc/rfc2518.txt): First WebDAV spec.
-* [RFC3744](http://www.ietf.org/rfc/rfc3744.txt): ACL (some features missing).
-* [RFC4709](http://www.ietf.org/rfc/rfc4709.txt): [DavMount](http://code.google.com/p/sabredav/wiki/DavMount).
-* [RFC4791](http://www.ietf.org/rfc/rfc4791.txt): CalDAV.
-* [RFC4918](http://www.ietf.org/rfc/rfc4918.txt): WebDAV revision.
-* [RFC5397](http://www.ietf.org/rfc/rfc5689.txt): current-user-principal.
-* [RFC5689](http://www.ietf.org/rfc/rfc5689.txt): Extended MKCOL.
-* [RFC5789](http://tools.ietf.org/html/rfc5789): PATCH method for HTTP.
-* [RFC6352](http://www.ietf.org/rfc/rfc6352.txt): CardDAV
-* [draft-daboo-carddav-directory-gateway](http://tools.ietf.org/html/draft-daboo-carddav-directory-gateway): CardDAV directory gateway
-* CalDAV ctag, CalDAV-proxy.
+Build status
+------------
+
+| branch       | status | minimum PHP version |
+| ------------ | ------ | ------------------- |
+| master       | [![Build Status](https://travis-ci.org/fruux/sabre-dav.svg?branch=master)](https://travis-ci.org/fruux/sabre-dav) | PHP 5.5 |
+| 3.0          | [![Build Status](https://travis-ci.org/fruux/sabre-dav.svg?branch=3.0)](https://travis-ci.org/fruux/sabre-dav) | PHP 5.4 |
+| 2.1          | [![Build Status](https://travis-ci.org/fruux/sabre-dav.svg?branch=2.1)](https://travis-ci.org/fruux/sabre-dav) | PHP 5.4 |
+| 2.0          | [![Build Status](https://travis-ci.org/fruux/sabre-dav.svg?branch=2.0)](https://travis-ci.org/fruux/sabre-dav) | PHP 5.4 |
+| 1.8          | [![Build Status](https://travis-ci.org/fruux/sabre-dav.svg?branch=1.8)](https://travis-ci.org/fruux/sabre-dav) | PHP 5.3 |
+| 1.7          | [![Build Status](https://travis-ci.org/fruux/sabre-dav.svg?branch=1.7)](https://travis-ci.org/fruux/sabre-dav) | PHP 5.3 |
+| 1.6          | [![Build Status](https://travis-ci.org/fruux/sabre-dav.svg?branch=1.6)](https://travis-ci.org/fruux/sabre-dav) | PHP 5.3 |
+
+Made at fruux
+-------------
+
+SabreDAV is being developed by [fruux](https://fruux.com/). Drop us a line for commercial services or enterprise support.

vendor/sabre/dav/bin/build.php

@@ -1,3 +1,4 @@
+#!/usr/bin/env php
 <?php
 
 $tasks = [
@@ -100,7 +101,7 @@ function composerupdate() {
 
     global $baseDir;
     echo "  Updating composer packages to latest version\n\n";
-    system('cd ' . $baseDir . '; composer update --dev');
+    system('cd ' . $baseDir . '; composer update');
 }
 
 function test() {
@@ -120,12 +121,51 @@ function test() {
 function buildzip() {
 
     global $baseDir, $version;
-    echo "  Asking composer to download sabre/dav $version\n\n";
-    system("composer create-project --no-dev sabre/dav build/SabreDAV $version", $code);
+    echo "  Generating composer.json\n";
+
+    $input = json_decode(file_get_contents(__DIR__ . '/../composer.json'), true);
+    $newComposer = [
+        "require" => $input['require'],
+        "config"  => [
+            "bin-dir" => "./bin",
+        ],
+        "prefer-stable"     => true,
+        "minimum-stability" => "alpha",
+    ];
+    unset(
+        $newComposer['require']['sabre/vobject'],
+        $newComposer['require']['sabre/http'],
+        $newComposer['require']['sabre/uri'],
+        $newComposer['require']['sabre/event']
+    );
+    $newComposer['require']['sabre/dav'] = $version;
+    mkdir('build/SabreDAV');
+    file_put_contents('build/SabreDAV/composer.json', json_encode($newComposer, JSON_PRETTY_PRINT));
+
+    echo "  Downloading dependencies\n";
+    system("cd build/SabreDAV; composer install -n", $code);
     if ($code !== 0) {
         echo "Composer reported error code $code\n";
         die(1);
     }
+
+    echo "  Removing pointless files\n";
+    unlink('build/SabreDAV/composer.json');
+    unlink('build/SabreDAV/composer.lock');
+
+    echo "  Moving important files to the root of the project\n";
+
+    $fileNames = [
+        'CHANGELOG.md',
+        'LICENSE',
+        'README.md',
+        'examples',
+    ];
+    foreach ($fileNames as $fileName) {
+        echo "    $fileName\n";
+        rename('build/SabreDAV/vendor/sabre/dav/' . $fileName, 'build/SabreDAV/' . $fileName);
+    }
+
     // <zip destfile="build/SabreDAV-${sabredav.version}.zip" basedir="build/SabreDAV" prefix="SabreDAV/" />
 
     echo "\n";

vendor/sabre/dav/bin/migrateto17.php

@@ -35,10 +35,10 @@ HELLO;
 
 // There's a bunch of places where the autoloader could be, so we'll try all of
 // them.
-$paths = array(
+$paths = [
     __DIR__ . '/../vendor/autoload.php',
     __DIR__ . '/../../../autoload.php',
-);
+];
 
 foreach ($paths as $path) {
     if (file_exists($path)) {
@@ -67,13 +67,13 @@ if (!$row) {
     exit(-1);
 }
 
-$requiredFields = array(
+$requiredFields = [
     'id',
     'calendardata',
     'uri',
     'calendarid',
     'lastmodified',
-);
+];
 
 foreach ($requiredFields as $requiredField) {
     if (!array_key_exists($requiredField, $row)) {
@@ -83,13 +83,13 @@ foreach($requiredFields as $requiredField) {
     }
 }
 
-$fields17 = array(
+$fields17 = [
     'etag',
     'size',
     'componenttype',
     'firstoccurence',
     'lastoccurence',
-);
+];
 
 $found = 0;
 foreach ($fields17 as $field) {
@@ -161,14 +161,14 @@ while($row = $result->fetch()) {
         echo "This record is ignored, you should inspect it to see if there's anything wrong.\n===\n";
         continue;
     }
-    $stmt->execute(array(
+    $stmt->execute([
         $newData['etag'],
         $newData['size'],
         $newData['componentType'],
         $newData['firstOccurence'],
         $newData['lastOccurence'],
         $row['id'],
-    ));
+    ]);
     $done++;
 
     if ($done % 500 === 0) {
@@ -256,7 +256,7 @@ function getDenormalizedData($calendarData) {
                 $lastOccurence = $firstOccurence;
             }
         } else {
-            $it = new \Sabre\VObject\RecurrenceIterator($vObject, (string)$component->UID);
+            $it = new \Sabre\VObject\Recur\EventIterator($vObject, (string)$component->UID);
             $maxDate = new DateTime(\Sabre\CalDAV\Backend\PDO::MAX_DATE);
             if ($it->isInfinite()) {
                 $lastOccurence = $maxDate->getTimeStamp();
@@ -273,12 +273,12 @@ function getDenormalizedData($calendarData) {
         }
     }
 
-    return array(
+    return [
         'etag'           => md5($calendarData),
         'size'           => strlen($calendarData),
         'componentType'  => $componentType,
         'firstOccurence' => $firstOccurence,
         'lastOccurence'  => $lastOccurence,
-    );
+    ];
 
 }

vendor/sabre/dav/bin/migrateto20.php

@@ -0,0 +1,453 @@
+#!/usr/bin/env php
+<?php
+
+echo "SabreDAV migrate script for version 2.0\n";
+
+if ($argc < 2) {
+
+    echo <<<HELLO
+
+This script help you migrate from a pre-2.0 database to 2.0 and later
+
+The 'calendars', 'addressbooks' and 'cards' tables will be upgraded, and new
+tables (calendarchanges, addressbookchanges, propertystorage) will be added.
+
+If you don't use the default PDO CalDAV or CardDAV backend, it's pointless to
+run this script.
+
+Keep in mind that ALTER TABLE commands will be executed. If you have a large
+dataset this may mean that this process takes a while.
+
+Lastly: Make a back-up first. This script has been tested, but the amount of
+potential variants are extremely high, so it's impossible to deal with every
+possible situation.
+
+In the worst case, you will lose all your data. This is not an overstatement.
+
+Usage:
+
+php {$argv[0]} [pdo-dsn] [username] [password]
+
+For example:
+
+php {$argv[0]} "mysql:host=localhost;dbname=sabredav" root password
+php {$argv[0]} sqlite:data/sabredav.db
+
+HELLO;
+
+    exit();
+
+}
+
+// There's a bunch of places where the autoloader could be, so we'll try all of
+// them.
+$paths = [
+    __DIR__ . '/../vendor/autoload.php',
+    __DIR__ . '/../../../autoload.php',
+];
+
+foreach ($paths as $path) {
+    if (file_exists($path)) {
+        include $path;
+        break;
+    }
+}
+
+$dsn = $argv[1];
+$user = isset($argv[2]) ? $argv[2] : null;
+$pass = isset($argv[3]) ? $argv[3] : null;
+
+echo "Connecting to database: " . $dsn . "\n";
+
+$pdo = new PDO($dsn, $user, $pass);
+$pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
+$pdo->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE, PDO::FETCH_ASSOC);
+
+$driver = $pdo->getAttribute(PDO::ATTR_DRIVER_NAME);
+
+switch ($driver) {
+
+    case 'mysql' :
+        echo "Detected MySQL.\n";
+        break;
+    case 'sqlite' :
+        echo "Detected SQLite.\n";
+        break;
+    default :
+        echo "Error: unsupported driver: " . $driver . "\n";
+        die(-1);
+}
+
+foreach (['calendar', 'addressbook'] as $itemType) {
+
+    $tableName = $itemType . 's';
+    $tableNameOld = $tableName . '_old';
+    $changesTable = $itemType . 'changes';
+
+    echo "Upgrading '$tableName'\n";
+
+    // The only cross-db way to do this, is to just fetch a single record.
+    $row = $pdo->query("SELECT * FROM $tableName LIMIT 1")->fetch();
+
+    if (!$row) {
+
+        echo "No records were found in the '$tableName' table.\n";
+        echo "\n";
+        echo "We're going to rename the old table to $tableNameOld (just in case).\n";
+        echo "and re-create the new table.\n";
+
+        switch ($driver) {
+
+            case 'mysql' :
+                $pdo->exec("RENAME TABLE $tableName TO $tableNameOld");
+                switch ($itemType) {
+                    case 'calendar' :
+                        $pdo->exec("
+            CREATE TABLE calendars (
+                id INT(11) UNSIGNED NOT NULL PRIMARY KEY AUTO_INCREMENT,
+                principaluri VARCHAR(100),
+                displayname VARCHAR(100),
+                uri VARCHAR(200),
+                synctoken INT(11) UNSIGNED NOT NULL DEFAULT '1',
+                description TEXT,
+                calendarorder INT(11) UNSIGNED NOT NULL DEFAULT '0',
+                calendarcolor VARCHAR(10),
+                timezone TEXT,
+                components VARCHAR(20),
+                transparent TINYINT(1) NOT NULL DEFAULT '0',
+                UNIQUE(principaluri, uri)
+            ) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
+                        ");
+                        break;
+                    case 'addressbook' :
+                        $pdo->exec("
+            CREATE TABLE addressbooks (
+                id INT(11) UNSIGNED NOT NULL PRIMARY KEY AUTO_INCREMENT,
+                principaluri VARCHAR(255),
+                displayname VARCHAR(255),
+                uri VARCHAR(200),
+                description TEXT,
+                synctoken INT(11) UNSIGNED NOT NULL DEFAULT '1',
+                UNIQUE(principaluri, uri)
+            ) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
+                        ");
+                        break;
+                }
+                break;
+
+            case 'sqlite' :
+
+                $pdo->exec("ALTER TABLE $tableName RENAME TO $tableNameOld");
+
+                switch ($itemType) {
+                    case 'calendar' :
+                        $pdo->exec("
+            CREATE TABLE calendars (
+                id integer primary key asc,
+                principaluri text,
+                displayname text,
+                uri text,
+                synctoken integer,
+                description text,
+                calendarorder integer,
+                calendarcolor text,
+                timezone text,
+                components text,
+                transparent bool
+            );
+                        ");
+                        break;
+                    case 'addressbook' :
+                        $pdo->exec("
+            CREATE TABLE addressbooks (
+                id integer primary key asc,
+                principaluri text,
+                displayname text,
+                uri text,
+                description text,
+                synctoken integer
+            );
+                        ");
+
+                        break;
+                }
+                break;
+
+        }
+        echo "Creation of 2.0 $tableName table is complete\n";
+
+    } else {
+
+        // Checking if there's a synctoken field already.
+        if (array_key_exists('synctoken', $row)) {
+            echo "The 'synctoken' field already exists in the $tableName table.\n";
+            echo "It's likely you already upgraded, so we're simply leaving\n";
+            echo "the $tableName table alone\n";
+        } else {
+
+            echo "1.8 table schema detected\n";
+            switch ($driver) {
+
+                case 'mysql' :
+                    $pdo->exec("ALTER TABLE $tableName ADD synctoken INT(11) UNSIGNED NOT NULL DEFAULT '1'");
+                    $pdo->exec("ALTER TABLE $tableName DROP ctag");
+                    $pdo->exec("UPDATE $tableName SET synctoken = '1'");
+                    break;
+                case 'sqlite' :
+                    $pdo->exec("ALTER TABLE $tableName ADD synctoken integer");
+                    $pdo->exec("UPDATE $tableName SET synctoken = '1'");
+                    echo "Note: there's no easy way to remove fields in sqlite.\n";
+                    echo "The ctag field is no longer used, but it's kept in place\n";
+                    break;
+
+            }
+
+            echo "Upgraded '$tableName' to 2.0 schema.\n";
+
+        }
+
+    }
+
+    try {
+        $pdo->query("SELECT * FROM $changesTable LIMIT 1");
+
+        echo "'$changesTable' already exists. Assuming that this part of the\n";
+        echo "upgrade was already completed.\n";
+
+    } catch (Exception $e) {
+        echo "Creating '$changesTable' table.\n";
+
+        switch ($driver) {
+
+            case 'mysql' :
+                $pdo->exec("
+    CREATE TABLE $changesTable (
+        id INT(11) UNSIGNED NOT NULL PRIMARY KEY AUTO_INCREMENT,
+        uri VARCHAR(200) NOT NULL,
+        synctoken INT(11) UNSIGNED NOT NULL,
+        {$itemType}id INT(11) UNSIGNED NOT NULL,
+        operation TINYINT(1) NOT NULL,
+        INDEX {$itemType}id_synctoken ({$itemType}id, synctoken)
+    ) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
+
+                ");
+                break;
+            case 'sqlite' :
+                $pdo->exec("
+
+    CREATE TABLE $changesTable (
+        id integer primary key asc,
+        uri text,
+        synctoken integer,
+        {$itemType}id integer,
+        operation bool
+    );
+
+                ");
+                $pdo->exec("CREATE INDEX {$itemType}id_synctoken ON $changesTable ({$itemType}id, synctoken);");
+                break;
+
+        }
+
+    }
+
+}
+
+try {
+    $pdo->query("SELECT * FROM calendarsubscriptions LIMIT 1");
+
+    echo "'calendarsubscriptions' already exists. Assuming that this part of the\n";
+    echo "upgrade was already completed.\n";
+
+} catch (Exception $e) {
+    echo "Creating calendarsubscriptions table.\n";
+
+    switch ($driver) {
+
+        case 'mysql' :
+            $pdo->exec("
+CREATE TABLE calendarsubscriptions (
+    id INT(11) UNSIGNED NOT NULL PRIMARY KEY AUTO_INCREMENT,
+    uri VARCHAR(200) NOT NULL,
+    principaluri VARCHAR(100) NOT NULL,
+    source TEXT,
+    displayname VARCHAR(100),
+    refreshrate VARCHAR(10),
+    calendarorder INT(11) UNSIGNED NOT NULL DEFAULT '0',
+    calendarcolor VARCHAR(10),
+    striptodos TINYINT(1) NULL,
+    stripalarms TINYINT(1) NULL,
+    stripattachments TINYINT(1) NULL,
+    lastmodified INT(11) UNSIGNED,
+    UNIQUE(principaluri, uri)
+);
+            ");
+            break;
+        case 'sqlite' :
+            $pdo->exec("
+
+CREATE TABLE calendarsubscriptions (
+    id integer primary key asc,
+    uri text,
+    principaluri text,
+    source text,
+    displayname text,
+    refreshrate text,
+    calendarorder integer,
+    calendarcolor text,
+    striptodos bool,
+    stripalarms bool,
+    stripattachments bool,
+    lastmodified int
+);
+            ");
+
+            $pdo->exec("CREATE INDEX principaluri_uri ON calendarsubscriptions (principaluri, uri);");
+            break;
+
+    }
+
+}
+
+try {
+    $pdo->query("SELECT * FROM propertystorage LIMIT 1");
+
+    echo "'propertystorage' already exists. Assuming that this part of the\n";
+    echo "upgrade was already completed.\n";
+
+} catch (Exception $e) {
+    echo "Creating propertystorage table.\n";
+
+    switch ($driver) {
+
+        case 'mysql' :
+            $pdo->exec("
+CREATE TABLE propertystorage (
+    id INT UNSIGNED NOT NULL PRIMARY KEY AUTO_INCREMENT,
+    path VARBINARY(1024) NOT NULL,
+    name VARBINARY(100) NOT NULL,
+    value MEDIUMBLOB
+);
+            ");
+            $pdo->exec("
+CREATE UNIQUE INDEX path_property ON propertystorage (path(600), name(100));
+            ");
+            break;
+        case 'sqlite' :
+            $pdo->exec("
+CREATE TABLE propertystorage (
+    id integer primary key asc,
+    path TEXT,
+    name TEXT,
+    value TEXT
+);
+            ");
+            $pdo->exec("
+CREATE UNIQUE INDEX path_property ON propertystorage (path, name);
+            ");
+
+            break;
+
+    }
+
+}
+
+echo "Upgrading cards table to 2.0 schema\n";
+
+try {
+
+    $create = false;
+    $row = $pdo->query("SELECT * FROM cards LIMIT 1")->fetch();
+    if (!$row) {
+        $random = mt_rand(1000, 9999);
+        echo "There was no data in the cards table, so we're re-creating it\n";
+        echo "The old table will be renamed to cards_old$random, just in case.\n";
+
+        $create = true;
+
+        switch ($driver) {
+            case 'mysql' :
+                $pdo->exec("RENAME TABLE cards TO cards_old$random");
+                break;
+            case 'sqlite' :
+                $pdo->exec("ALTER TABLE cards RENAME TO cards_old$random");
+                break;
+
+        }
+    }
+
+} catch (Exception $e) {
+
+    echo "Exception while checking cards table. Assuming that the table does not yet exist.\n";
+    echo "Debug: ", $e->getMessage(), "\n";
+    $create = true;
+
+}
+
+if ($create) {
+    switch ($driver) {
+        case 'mysql' :
+            $pdo->exec("
+CREATE TABLE cards (
+    id INT(11) UNSIGNED NOT NULL PRIMARY KEY AUTO_INCREMENT,
+    addressbookid INT(11) UNSIGNED NOT NULL,
+    carddata MEDIUMBLOB,
+    uri VARCHAR(200),
+    lastmodified INT(11) UNSIGNED,
+    etag VARBINARY(32),
+    size INT(11) UNSIGNED NOT NULL
+) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
+
+            ");
+            break;
+
+        case 'sqlite' :
+
+            $pdo->exec("
+CREATE TABLE cards (
+    id integer primary key asc,
+    addressbookid integer,
+    carddata blob,
+    uri text,
+    lastmodified integer,
+    etag text,
+    size integer
+);
+            ");
+            break;
+
+    }
+} else {
+    switch ($driver) {
+        case 'mysql' :
+            $pdo->exec("
+                ALTER TABLE cards
+                ADD etag VARBINARY(32),
+                ADD size INT(11) UNSIGNED NOT NULL;
+            ");
+            break;
+
+        case 'sqlite' :
+
+            $pdo->exec("
+                ALTER TABLE cards ADD etag text;
+                ALTER TABLE cards ADD size integer;
+            ");
+            break;
+
+    }
+    echo "Reading all old vcards and populating etag and size fields.\n";
+    $result = $pdo->query('SELECT id, carddata FROM cards');
+    $stmt = $pdo->prepare('UPDATE cards SET etag = ?, size = ? WHERE id = ?');
+    while ($row = $result->fetch(\PDO::FETCH_ASSOC)) {
+        $stmt->execute([
+            md5($row['carddata']),
+            strlen($row['carddata']),
+            $row['id']
+        ]);
+    }
+
+
+}
+
+echo "Upgrade to 2.0 schema completed.\n";

vendor/sabre/dav/bin/migrateto21.php

@@ -0,0 +1,180 @@
+#!/usr/bin/env php
+<?php
+
+echo "SabreDAV migrate script for version 2.1\n";
+
+if ($argc < 2) {
+
+    echo <<<HELLO
+
+This script help you migrate from a pre-2.1 database to 2.1.
+
+Changes:
+  The 'calendarobjects' table will be upgraded.
+  'schedulingobjects' will be created.
+
+If you don't use the default PDO CalDAV or CardDAV backend, it's pointless to
+run this script.
+
+Keep in mind that ALTER TABLE commands will be executed. If you have a large
+dataset this may mean that this process takes a while.
+
+Lastly: Make a back-up first. This script has been tested, but the amount of
+potential variants are extremely high, so it's impossible to deal with every
+possible situation.
+
+In the worst case, you will lose all your data. This is not an overstatement.
+
+Usage:
+
+php {$argv[0]} [pdo-dsn] [username] [password]
+
+For example:
+
+php {$argv[0]} "mysql:host=localhost;dbname=sabredav" root password
+php {$argv[0]} sqlite:data/sabredav.db
+
+HELLO;
+
+    exit();
+
+}
+
+// There's a bunch of places where the autoloader could be, so we'll try all of
+// them.
+$paths = [
+    __DIR__ . '/../vendor/autoload.php',
+    __DIR__ . '/../../../autoload.php',
+];
+
+foreach ($paths as $path) {
+    if (file_exists($path)) {
+        include $path;
+        break;
+    }
+}
+
+$dsn = $argv[1];
+$user = isset($argv[2]) ? $argv[2] : null;
+$pass = isset($argv[3]) ? $argv[3] : null;
+
+echo "Connecting to database: " . $dsn . "\n";
+
+$pdo = new PDO($dsn, $user, $pass);
+$pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
+$pdo->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE, PDO::FETCH_ASSOC);
+
+$driver = $pdo->getAttribute(PDO::ATTR_DRIVER_NAME);
+
+switch ($driver) {
+
+    case 'mysql' :
+        echo "Detected MySQL.\n";
+        break;
+    case 'sqlite' :
+        echo "Detected SQLite.\n";
+        break;
+    default :
+        echo "Error: unsupported driver: " . $driver . "\n";
+        die(-1);
+}
+
+echo "Upgrading 'calendarobjects'\n";
+$addUid = false;
+try {
+    $result = $pdo->query('SELECT * FROM calendarobjects LIMIT 1');
+    $row = $result->fetch(\PDO::FETCH_ASSOC);
+
+    if (!$row) {
+        echo "No data in table. Going to try to add the uid field anyway.\n";
+        $addUid = true;
+    } elseif (array_key_exists('uid', $row)) {
+        echo "uid field exists. Assuming that this part of the migration has\n";
+        echo "Already been completed.\n";
+    } else {
+        echo "2.0 schema detected.\n";
+        $addUid = true;
+    }
+
+} catch (Exception $e) {
+    echo "Could not find a calendarobjects table. Skipping this part of the\n";
+    echo "upgrade.\n";
+}
+
+if ($addUid) {
+
+    switch ($driver) {
+        case 'mysql' :
+            $pdo->exec('ALTER TABLE calendarobjects ADD uid VARCHAR(200)');
+            break;
+        case 'sqlite' :
+            $pdo->exec('ALTER TABLE calendarobjects ADD uid TEXT');
+            break;
+    }
+
+    $result = $pdo->query('SELECT id, calendardata FROM calendarobjects');
+    $stmt = $pdo->prepare('UPDATE calendarobjects SET uid = ? WHERE id = ?');
+    $counter = 0;
+
+    while ($row = $result->fetch(\PDO::FETCH_ASSOC)) {
+
+        try {
+            $vobj = \Sabre\VObject\Reader::read($row['calendardata']);
+        } catch (\Exception $e) {
+            echo "Warning! Item with id $row[id] could not be parsed!\n";
+            continue;
+        }
+        $uid = null;
+        $item = $vobj->getBaseComponent();
+        if (!isset($item->UID)) {
+            echo "Warning! Item with id $item[id] does NOT have a UID property and this is required.\n";
+            continue;
+        }
+        $uid = (string)$item->UID;
+        $stmt->execute([$uid, $row['id']]);
+        $counter++;
+
+    }
+
+}
+
+echo "Creating 'schedulingobjects'\n";
+
+switch ($driver) {
+
+    case 'mysql' :
+        $pdo->exec('CREATE TABLE IF NOT EXISTS schedulingobjects
+(
+    id INT(11) UNSIGNED NOT NULL PRIMARY KEY AUTO_INCREMENT,
+    principaluri VARCHAR(255),
+    calendardata MEDIUMBLOB,
+    uri VARCHAR(200),
+    lastmodified INT(11) UNSIGNED,
+    etag VARCHAR(32),
+    size INT(11) UNSIGNED NOT NULL
+) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
+        ');
+        break;
+
+
+    case 'sqlite' :
+        $pdo->exec('CREATE TABLE IF NOT EXISTS schedulingobjects (
+    id integer primary key asc,
+    principaluri text,
+    calendardata blob,
+    uri text,
+    lastmodified integer,
+    etag text,
+    size integer
+)
+');
+        break;
+        $pdo->exec('
+            CREATE INDEX principaluri_uri ON calendarsubscriptions (principaluri, uri);
+        ');
+        break;
+}
+
+echo "Done.\n";
+
+echo "Upgrade to 2.1 schema completed.\n";

vendor/sabre/dav/bin/migrateto30.php

@@ -0,0 +1,171 @@
+#!/usr/bin/env php
+<?php
+
+echo "SabreDAV migrate script for version 3.0\n";
+
+if ($argc < 2) {
+
+    echo <<<HELLO
+
+This script help you migrate from a pre-3.0 database to 3.0 and later
+
+Changes:
+  * The propertystorage table has changed to allow storage of complex
+    properties.
+  * the vcardurl field in the principals table is no more. This was moved to
+    the propertystorage table.
+
+Keep in mind that ALTER TABLE commands will be executed. If you have a large
+dataset this may mean that this process takes a while.
+
+Lastly: Make a back-up first. This script has been tested, but the amount of
+potential variants are extremely high, so it's impossible to deal with every
+possible situation.
+
+In the worst case, you will lose all your data. This is not an overstatement.
+
+Usage:
+
+php {$argv[0]} [pdo-dsn] [username] [password]
+
+For example:
+
+php {$argv[0]} "mysql:host=localhost;dbname=sabredav" root password
+php {$argv[0]} sqlite:data/sabredav.db
+
+HELLO;
+
+    exit();
+
+}
+
+// There's a bunch of places where the autoloader could be, so we'll try all of
+// them.
+$paths = [
+    __DIR__ . '/../vendor/autoload.php',
+    __DIR__ . '/../../../autoload.php',
+];
+
+foreach ($paths as $path) {
+    if (file_exists($path)) {
+        include $path;
+        break;
+    }
+}
+
+$dsn = $argv[1];
+$user = isset($argv[2]) ? $argv[2] : null;
+$pass = isset($argv[3]) ? $argv[3] : null;
+
+echo "Connecting to database: " . $dsn . "\n";
+
+$pdo = new PDO($dsn, $user, $pass);
+$pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
+$pdo->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE, PDO::FETCH_ASSOC);
+
+$driver = $pdo->getAttribute(PDO::ATTR_DRIVER_NAME);
+
+switch ($driver) {
+
+    case 'mysql' :
+        echo "Detected MySQL.\n";
+        break;
+    case 'sqlite' :
+        echo "Detected SQLite.\n";
+        break;
+    default :
+        echo "Error: unsupported driver: " . $driver . "\n";
+        die(-1);
+}
+
+echo "Upgrading 'propertystorage'\n";
+$addValueType = false;
+try {
+    $result = $pdo->query('SELECT * FROM propertystorage LIMIT 1');
+    $row = $result->fetch(\PDO::FETCH_ASSOC);
+
+    if (!$row) {
+        echo "No data in table. Going to re-create the table.\n";
+        $random = mt_rand(1000, 9999);
+        echo "Renaming propertystorage -> propertystorage_old$random and creating new table.\n";
+
+        switch ($driver) {
+
+            case 'mysql' :
+                $pdo->exec('RENAME TABLE propertystorage TO propertystorage_old' . $random);
+                $pdo->exec('
+    CREATE TABLE propertystorage (
+        id INT UNSIGNED NOT NULL PRIMARY KEY AUTO_INCREMENT,
+        path VARBINARY(1024) NOT NULL,
+        name VARBINARY(100) NOT NULL,
+        valuetype INT UNSIGNED,
+        value MEDIUMBLOB
+    );
+                ');
+                $pdo->exec('CREATE UNIQUE INDEX path_property_' . $random . '  ON propertystorage (path(600), name(100));');
+                break;
+            case 'sqlite' :
+                $pdo->exec('ALTER TABLE propertystorage RENAME TO propertystorage_old' . $random);
+                $pdo->exec('
+CREATE TABLE propertystorage (
+    id integer primary key asc,
+    path text,
+    name text,
+    valuetype integer,
+    value blob
+);');
+
+                $pdo->exec('CREATE UNIQUE INDEX path_property_' . $random . ' ON propertystorage (path, name);');
+                break;
+
+        }
+    } elseif (array_key_exists('valuetype', $row)) {
+        echo "valuetype field exists. Assuming that this part of the migration has\n";
+        echo "Already been completed.\n";
+    } else {
+        echo "2.1 schema detected. Going to perform upgrade.\n";
+        $addValueType = true;
+    }
+
+} catch (Exception $e) {
+    echo "Could not find a propertystorage table. Skipping this part of the\n";
+    echo "upgrade.\n";
+    echo $e->getMessage(), "\n";
+}
+
+if ($addValueType) {
+
+    switch ($driver) {
+        case 'mysql' :
+            $pdo->exec('ALTER TABLE propertystorage ADD valuetype INT UNSIGNED');
+            break;
+        case 'sqlite' :
+            $pdo->exec('ALTER TABLE propertystorage ADD valuetype INT');
+
+            break;
+    }
+
+    $pdo->exec('UPDATE propertystorage SET valuetype = 1 WHERE valuetype IS NULL ');
+
+}
+
+echo "Migrating vcardurl\n";
+
+$result = $pdo->query('SELECT id, uri, vcardurl FROM principals WHERE vcardurl IS NOT NULL');
+$stmt1 = $pdo->prepare('INSERT INTO propertystorage (path, name, valuetype, value) VALUES (?, ?, 3, ?)');
+
+while ($row = $result->fetch(\PDO::FETCH_ASSOC)) {
+
+    // Inserting the new record
+    $stmt1->execute([
+        'addressbooks/' . basename($row['uri']),
+        '{http://calendarserver.org/ns/}me-card',
+        serialize(new Sabre\DAV\Xml\Property\Href($row['vcardurl']))
+    ]);
+
+    echo serialize(new Sabre\DAV\Xml\Property\Href($row['vcardurl']));
+
+}
+
+echo "Done.\n";
+echo "Upgrade to 3.0 schema completed.\n";

vendor/sabre/dav/bin/naturalselection

@@ -6,7 +6,7 @@
 # http://www.rooftopsolutions.nl/
 #
 # This utility is distributed along with SabreDAV
-# license: http://code.google.com/p/sabredav/wiki/License Modified BSD License
+# license: http://sabre.io/license/ Modified BSD License
 
 import os
 from optparse import OptionParser
@@ -16,16 +16,16 @@ def getfreespace(path):
     stat = os.statvfs(path)
     return stat.f_frsize * stat.f_bavail
 
-def getbytesleft(path,treshold):
-    return getfreespace(path)-treshold
+def getbytesleft(path,threshold):
+    return getfreespace(path)-threshold
 
-def run(cacheDir, treshold, sleep=5, simulate=False, min_erase = 0):
+def run(cacheDir, threshold, sleep=5, simulate=False, min_erase = 0):
 
-    bytes = getbytesleft(cacheDir,treshold)
+    bytes = getbytesleft(cacheDir,threshold)
     if (bytes>0):
-        print "Bytes to go before we hit treshhold:", bytes
+        print "Bytes to go before we hit threshold:", bytes
     else:
-        print "Treshold exceeded with:", -bytes, "bytes"
+        print "Threshold exceeded with:", -bytes, "bytes"
         dir = os.listdir(cacheDir)
         dir2 = []
         for file in dir:
@@ -46,7 +46,7 @@ def run(cacheDir, treshold, sleep=5, simulate=False, min_erase = 0):
         left = min_erase
 
         # If the min_erase setting is lower than the amount of bytes over
-        # the treshold, we use that number instead.
+        # the threshold, we use that number instead.
         if left < -bytes :
             left = -bytes
 
@@ -72,8 +72,8 @@ def run(cacheDir, treshold, sleep=5, simulate=False, min_erase = 0):
 
 def main():
     parser = OptionParser(
-        version="naturalselecton v0.3",
-        description="Cache directory manager. Deletes cache entries based on accesstime and free space tresholds.\n" +
+        version="naturalselection v0.3",
+        description="Cache directory manager. Deletes cache entries based on accesstime and free space thresholds.\n" +
             "This utility is distributed alongside SabreDAV.",
         usage="usage: %prog [options] cacheDirectory",
     )
@@ -98,15 +98,15 @@ def main():
         default=5
     )
     parser.add_option(
-        '-l','--treshold',
-        help="Treshhold in bytes (default = 10737418240, which is 10GB)",
+        '-l','--threshold',
+        help="Threshold in bytes (default = 10737418240, which is 10GB)",
         type="int",
-        dest="treshold",
+        dest="threshold",
         default=10737418240
     )
     parser.add_option(
         '-m', '--min-erase',
-        help="Minimum number of bytes to erase when the treshold is reached. " +
+        help="Minimum number of bytes to erase when the threshold is reached. " +
             "Setting this option higher will reduce the amount of times the cache directory will need to be scanned. " +
             "(the default is 1073741824, which is 1GB.)",
         type="int",
@@ -130,7 +130,7 @@ def main():
             cacheDir,
             sleep=options.sleep,
             simulate=options.simulate,
-            treshold=options.treshold,
+            threshold=options.threshold,
             min_erase=options.min_erase
         )
         if runs>0:

vendor/sabre/dav/bin/sabredav.php

@@ -27,10 +27,10 @@ if (php_sapi_name()!=='cli-server') {
 // Finding composer
 
 
-$paths = array(
+$paths = [
     __DIR__ . '/../vendor/autoload.php',
     __DIR__ . '/../../../autoload.php',
-);
+];
 
 foreach ($paths as $path) {
     if (file_exists($path)) {

vendor/sabre/dav/examples/addressbookserver.php

@@ -35,22 +35,23 @@ $carddavBackend   = new Sabre\CardDAV\Backend\PDO($pdo);
 //$caldavBackend    = new Sabre\CalDAV\Backend\PDO($pdo);
 
 // Setting up the directory tree //
-$nodes = array(
+$nodes = [
     new Sabre\DAVACL\PrincipalCollection($principalBackend),
-//    new Sabre\CalDAV\CalendarRootNode($authBackend, $caldavBackend),
+//    new Sabre\CalDAV\CalendarRoot($authBackend, $caldavBackend),
     new Sabre\CardDAV\AddressBookRoot($principalBackend, $carddavBackend),
-);
+];
 
 // The object tree needs in turn to be passed to the server class
 $server = new Sabre\DAV\Server($nodes);
 $server->setBaseUri($baseUri);
 
 // Plugins
-$server->addPlugin(new Sabre\DAV\Auth\Plugin($authBackend,'SabreDAV'));
+$server->addPlugin(new Sabre\DAV\Auth\Plugin($authBackend));
 $server->addPlugin(new Sabre\DAV\Browser\Plugin());
 //$server->addPlugin(new Sabre\CalDAV\Plugin());
 $server->addPlugin(new Sabre\CardDAV\Plugin());
 $server->addPlugin(new Sabre\DAVACL\Plugin());
+$server->addPlugin(new Sabre\DAV\Sync\Plugin());
 
 // And off we go!
 $server->exec();

vendor/sabre/dav/examples/basicauth.php

@@ -1,26 +0,0 @@
-<?php
-
-// !!!! Make sure the Sabre directory is in the include_path !!!
-// example:
-// set_include_path('lib/' . PATH_SEPARATOR . get_include_path());
-
-// settings
-date_default_timezone_set('Canada/Eastern');
-
-// Files we need
-require_once 'vendor/autoload.php';
-
-$u = 'admin';
-$p = '1234';
-
-$auth = new \Sabre\HTTP\BasicAuth();
-
-$result = $auth->getUserPass();
-
-if (!$result || $result[0]!=$u || $result[1]!=$p) {
-
-    $auth->requireLogin();
-    echo "Authentication required\n";
-    die();
-
-}

vendor/sabre/dav/examples/digestauth.php

@@ -1,25 +0,0 @@
-<?php
-
-// !!!! Make sure the Sabre directory is in the include_path !!!
-// example:
-// set_include_path('lib/' . PATH_SEPARATOR . get_include_path());
-
-// settings
-date_default_timezone_set('Canada/Eastern');
-
-// Files we need
-require_once 'vendor/autoload.php';
-
-$u = 'admin';
-$p = '1234';
-
-$auth = new \Sabre\HTTP\DigestAuth();
-$auth->init();
-
-if ($auth->getUsername() != $u || !$auth->validatePassword($p)) {
-
-    $auth->requireLogin();
-    echo "Authentication required\n";
-    die();
-
-}

vendor/sabre/dav/examples/simplefsserver.php

@@ -1,123 +0,0 @@
-<?php
-
-// !!!! Make sure the Sabre directory is in the include_path !!!
-// example:
-// set_include_path('lib/' . PATH_SEPARATOR . get_include_path());
-
-/*
-
-This example demonstrates a simple way to create your own virtual filesystems.
-By extending the _File and Directory classes, you can easily create a tree
-based on various datasources.
-
-The most obvious example is the filesystem itself. A more complete and documented
-example can be found in:
-
-lib/Sabre/DAV/FS/Node.php
-lib/Sabre/DAV/FS/Directory.php
-lib/Sabre/DAV/FS/File.php
-
-*/
-
-// settings
-date_default_timezone_set('Canada/Eastern');
-$publicDir = 'public';
-
-// Files we need
-require_once 'vendor/autoload.php';
-
-class MyCollection extends Sabre\DAV\Collection {
-
-  private $myPath;
-
-  function __construct($myPath) {
-
-    $this->myPath = $myPath;
-
-  }
-
-  function getChildren() {
-
-    $children = array();
-    // Loop through the directory, and create objects for each node
-    foreach(scandir($this->myPath) as $node) {
-
-      // Ignoring files staring with .
-      if ($node[0]==='.') continue;
-
-      $children[] = $this->getChild($node);
-
-    }
-
-    return $children;
-
-  }
-
-    function getChild($name) {
-
-        $path = $this->myPath . '/' . $name;
-
-        // We have to throw a NotFound exception if the file didn't exist
-        if (!file\exists($this->myPath)) throw new \Sabre\DAV\Exception\NotFound('The file with name: ' . $name . ' could not be found');
-        // Some added security
-
-        if ($name[0]=='.')  throw new \Sabre\DAV\Exception\Forbidden('Access denied');
-
-        if (is_dir($path)) {
-
-            return new \MyCollection($name);
-
-        } else {
-
-            return new \MyFile($path);
-
-        }
-
-    }
-
-    function getName() {
-
-        return basename($this->myPath);
-
-    }
-
-}
-
-class MyFile extends \Sabre\DAV\File {
-
-  private $myPath;
-
-  function __construct($myPath) {
-
-    $this->myPath = $myPath;
-
-  }
-
-  function getName() {
-
-      return basename($this->myPath);
-
-  }
-
-  function get() {
-
-    return fopen($this->myPath,'r');
-
-  }
-
-  function getSize() {
-
-      return filesize($this->myPath);
-
-  }
-
-}
-
-// Make sure there is a directory in your current directory named 'public'. We will be exposing that directory to WebDAV
-$rootNode = new \MyCollection($publicDir);
-
-// The rootNode needs to be passed to the server object.
-$server = new \Sabre\DAV\Server($rootNode);
-
-// And off we go!
-$server->exec();

vendor/sabre/dav/examples/sql/mysql.addressbook.sql

@@ -1,18 +1,28 @@
 CREATE TABLE addressbooks (
     id INT(11) UNSIGNED NOT NULL PRIMARY KEY AUTO_INCREMENT,
-    principaluri VARCHAR(255),
+    principaluri VARBINARY(255),
     displayname VARCHAR(255),
-    uri VARCHAR(200),
+    uri VARBINARY(200),
     description TEXT,
-    ctag INT(11) UNSIGNED NOT NULL DEFAULT '1',
-    UNIQUE(principaluri, uri)
-) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
+    synctoken INT(11) UNSIGNED NOT NULL DEFAULT '1',
+    UNIQUE(principaluri(100), uri(100))
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
 
 CREATE TABLE cards (
     id INT(11) UNSIGNED NOT NULL PRIMARY KEY AUTO_INCREMENT,
     addressbookid INT(11) UNSIGNED NOT NULL,
     carddata MEDIUMBLOB,
-    uri VARCHAR(200),
-    lastmodified INT(11) UNSIGNED
-) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
+    uri VARBINARY(200),
+    lastmodified INT(11) UNSIGNED,
+    etag VARBINARY(32),
+    size INT(11) UNSIGNED NOT NULL
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
 
+CREATE TABLE addressbookchanges (
+    id INT(11) UNSIGNED NOT NULL PRIMARY KEY AUTO_INCREMENT,
+    uri VARBINARY(200) NOT NULL,
+    synctoken INT(11) UNSIGNED NOT NULL,
+    addressbookid INT(11) UNSIGNED NOT NULL,
+    operation TINYINT(1) NOT NULL,
+    INDEX addressbookid_synctoken (addressbookid, synctoken)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

vendor/sabre/dav/examples/sql/mysql.calendars.sql

@@ -1,28 +1,64 @@
 CREATE TABLE calendarobjects (
-    id INTEGER UNSIGNED NOT NULL PRIMARY KEY AUTO_INCREMENT,
+    id INT(11) UNSIGNED NOT NULL PRIMARY KEY AUTO_INCREMENT,
     calendardata MEDIUMBLOB,
-    uri VARCHAR(200),
+    uri VARBINARY(200),
     calendarid INTEGER UNSIGNED NOT NULL,
     lastmodified INT(11) UNSIGNED,
-    etag VARCHAR(32),
+    etag VARBINARY(32),
     size INT(11) UNSIGNED NOT NULL,
-    componenttype VARCHAR(8),
+    componenttype VARBINARY(8),
     firstoccurence INT(11) UNSIGNED,
     lastoccurence INT(11) UNSIGNED,
+    uid VARBINARY(200),
     UNIQUE(calendarid, uri)
-) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
 
 CREATE TABLE calendars (
     id INTEGER UNSIGNED NOT NULL PRIMARY KEY AUTO_INCREMENT,
-    principaluri VARCHAR(100),
+    principaluri VARBINARY(100),
     displayname VARCHAR(100),
-    uri VARCHAR(200),
-    ctag INTEGER UNSIGNED NOT NULL DEFAULT '0',
+    uri VARBINARY(200),
+    synctoken INTEGER UNSIGNED NOT NULL DEFAULT '1',
     description TEXT,
-    calendarorder INTEGER UNSIGNED NOT NULL DEFAULT '0',
-    calendarcolor VARCHAR(10),
+    calendarorder INT(11) UNSIGNED NOT NULL DEFAULT '0',
+    calendarcolor VARBINARY(10),
     timezone TEXT,
-    components VARCHAR(20),
+    components VARBINARY(21),
     transparent TINYINT(1) NOT NULL DEFAULT '0',
     UNIQUE(principaluri, uri)
-) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
+
+CREATE TABLE calendarchanges (
+    id INT(11) UNSIGNED NOT NULL PRIMARY KEY AUTO_INCREMENT,
+    uri VARBINARY(200) NOT NULL,
+    synctoken INT(11) UNSIGNED NOT NULL,
+    calendarid INT(11) UNSIGNED NOT NULL,
+    operation TINYINT(1) NOT NULL,
+    INDEX calendarid_synctoken (calendarid, synctoken)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
+
+CREATE TABLE calendarsubscriptions (
+    id INT(11) UNSIGNED NOT NULL PRIMARY KEY AUTO_INCREMENT,
+    uri VARBINARY(200) NOT NULL,
+    principaluri VARBINARY(100) NOT NULL,
+    source TEXT,
+    displayname VARCHAR(100),
+    refreshrate VARCHAR(10),
+    calendarorder INT(11) UNSIGNED NOT NULL DEFAULT '0',
+    calendarcolor VARBINARY(10),
+    striptodos TINYINT(1) NULL,
+    stripalarms TINYINT(1) NULL,
+    stripattachments TINYINT(1) NULL,
+    lastmodified INT(11) UNSIGNED,
+    UNIQUE(principaluri, uri)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
+
+CREATE TABLE schedulingobjects (
+    id INT(11) UNSIGNED NOT NULL PRIMARY KEY AUTO_INCREMENT,
+    principaluri VARBINARY(255),
+    calendardata MEDIUMBLOB,
+    uri VARBINARY(200),
+    lastmodified INT(11) UNSIGNED,
+    etag VARBINARY(32),
+    size INT(11) UNSIGNED NOT NULL
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

vendor/sabre/dav/examples/sql/mysql.locks.sql

@@ -3,11 +3,10 @@ CREATE TABLE locks (
     owner VARCHAR(100),
     timeout INTEGER UNSIGNED,
     created INTEGER,
-    token VARCHAR(100),
+    token VARBINARY(100),
     scope TINYINT,
     depth TINYINT,
-    uri VARCHAR(1000),
+    uri VARBINARY(1000),
     INDEX(token),
-    INDEX(uri)
-);
-
+    INDEX(uri(100))
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

vendor/sabre/dav/examples/sql/mysql.principals.sql

@@ -1,19 +1,17 @@
 CREATE TABLE principals (
     id INTEGER UNSIGNED NOT NULL PRIMARY KEY AUTO_INCREMENT,
-    uri VARCHAR(200) NOT NULL,
-    email VARCHAR(80),
+    uri VARBINARY(200) NOT NULL,
+    email VARBINARY(80),
     displayname VARCHAR(80),
-    vcardurl VARCHAR(255),
     UNIQUE(uri)
-);
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
 
 CREATE TABLE groupmembers (
     id INTEGER UNSIGNED NOT NULL PRIMARY KEY AUTO_INCREMENT,
     principal_id INTEGER UNSIGNED NOT NULL,
     member_id INTEGER UNSIGNED NOT NULL,
     UNIQUE(principal_id, member_id)
-);
-
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
 
 INSERT INTO principals (uri,email,displayname) VALUES
 ('principals/admin', 'admin@example.org','Administrator'),

vendor/sabre/dav/examples/sql/mysql.users.sql

@@ -1,9 +1,9 @@
 CREATE TABLE users (
     id INTEGER UNSIGNED NOT NULL PRIMARY KEY AUTO_INCREMENT,
-    username VARCHAR(50),
-    digesta1 VARCHAR(32),
+    username VARBINARY(50),
+    digesta1 VARBINARY(32),
     UNIQUE(username)
-);
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
 
 INSERT INTO users (username,digesta1) VALUES
 ('admin',  '87fd274b7b6c01e48d7c2f965da8ddf7');

vendor/sabre/dav/examples/sql/pgsql.addressbook.sql

@@ -4,7 +4,7 @@ CREATE TABLE addressbooks (
     displayname VARCHAR(255),
     uri VARCHAR(200),
     description TEXT,
-    ctag INTEGER NOT NULL DEFAULT 1
+    synctoken INTEGER NOT NULL DEFAULT 1
 );
 
 ALTER TABLE ONLY addressbooks
@@ -18,7 +18,9 @@ CREATE TABLE cards (
     addressbookid INTEGER NOT NULL,
     carddata TEXT,
     uri VARCHAR(200),
-    lastmodified INTEGER
+    lastmodified INTEGER,
+    etag VARCHAR(32),
+    size INTEGER NOT NULL
 );
 
 ALTER TABLE ONLY cards
@@ -31,3 +33,20 @@ ALTER TABLE ONLY cards
     ADD CONSTRAINT cards_addressbookid_fkey FOREIGN KEY (addressbookid) REFERENCES addressbooks(id)
         ON DELETE CASCADE;
 
+CREATE TABLE addressbookchanges (
+    id SERIAL NOT NULL,
+    uri VARCHAR(200) NOT NULL,
+    synctoken INTEGER NOT NULL,
+    addressbookid INTEGER NOT NULL,
+    operation SMALLINT NOT NULL
+);
+
+ALTER TABLE ONLY addressbookchanges
+    ADD CONSTRAINT addressbookchanges_pkey PRIMARY KEY (id);
+
+CREATE INDEX addressbookchanges_addressbookid_synctoken_ix
+    ON addressbookchanges USING btree (addressbookid, synctoken);
+
+ALTER TABLE ONLY addressbookchanges
+    ADD CONSTRAINT addressbookchanges_addressbookid_fkey FOREIGN KEY (addressbookid) REFERENCES addressbooks(id)
+        ON DELETE CASCADE;

vendor/sabre/dav/examples/sql/pgsql.calendars.sql

@@ -3,12 +3,13 @@ CREATE TABLE calendars (
     principaluri VARCHAR(100),
     displayname VARCHAR(100),
     uri VARCHAR(200),
-    ctag INTEGER NOT NULL DEFAULT 0,
+    synctoken INTEGER NOT NULL DEFAULT 1,
     description TEXT,
     calendarorder INTEGER NOT NULL DEFAULT 0,
     calendarcolor VARCHAR(10),
     timezone TEXT,
     components VARCHAR(20),
+    uid VARCHAR(200),
     transparent SMALLINT NOT NULL DEFAULT '0'
 );
 
@@ -20,15 +21,16 @@ CREATE UNIQUE INDEX calendars_ukey
 
 CREATE TABLE calendarobjects (
     id SERIAL NOT NULL,
-    calendarid INTEGER NOT NULL,
     calendardata TEXT,
     uri VARCHAR(200),
+    calendarid INTEGER NOT NULL,
+    lastmodified INTEGER,
     etag VARCHAR(32),
     size INTEGER NOT NULL,
     componenttype VARCHAR(8),
-    lastmodified INTEGER,
     firstoccurence INTEGER,
-    lastoccurence INTEGER
+    lastoccurence INTEGER,
+    uid VARCHAR(200)
 );
 
 ALTER TABLE ONLY calendarobjects
@@ -40,3 +42,52 @@ CREATE UNIQUE INDEX calendarobjects_ukey
 ALTER TABLE ONLY calendarobjects
     ADD CONSTRAINT calendarobjects_calendarid_fkey FOREIGN KEY (calendarid) REFERENCES calendars(id)
         ON DELETE CASCADE;
+
+CREATE TABLE calendarsubscriptions (
+    id SERIAL NOT NULL,
+    uri VARCHAR(200) NOT NULL,
+    principaluri VARCHAR(100) NOT NULL,
+    source TEXT,
+    displayname VARCHAR(100),
+    refreshrate VARCHAR(10),
+    calendarorder INTEGER NOT NULL DEFAULT 0,
+    calendarcolor VARCHAR(10),
+    striptodos SMALLINT NULL,
+    stripalarms SMALLINT NULL,
+    stripattachments SMALLINT NULL,
+    lastmodified INTEGER
+);
+
+ALTER TABLE ONLY calendarsubscriptions
+    ADD CONSTRAINT calendarsubscriptions_pkey PRIMARY KEY (id);
+
+CREATE UNIQUE INDEX calendarsubscriptions_ukey
+    ON calendarsubscriptions USING btree (principaluri, uri);
+
+CREATE TABLE calendarchanges (
+    id SERIAL NOT NULL,
+    uri VARCHAR(200) NOT NULL,
+    synctoken INTEGER NOT NULL,
+    calendarid INTEGER NOT NULL,
+    operation SMALLINT NOT NULL DEFAULT 0
+);
+
+ALTER TABLE ONLY calendarchanges
+    ADD CONSTRAINT calendarchanges_pkey PRIMARY KEY (id);
+
+CREATE INDEX calendarchanges_calendarid_synctoken_ix
+    ON calendarchanges USING btree (calendarid, synctoken);
+
+ALTER TABLE ONLY calendarchanges
+    ADD CONSTRAINT calendarchanges_calendar_fk FOREIGN KEY (calendarid) REFERENCES calendars(id)
+        ON DELETE CASCADE;
+
+CREATE TABLE schedulingobjects (
+    id SERIAL NOT NULL,
+    principaluri VARCHAR(255),
+    calendardata BYTEA,
+    uri VARCHAR(200),
+    lastmodified INTEGER,
+    etag VARCHAR(32),
+    size INTEGER NOT NULL
+);

vendor/sabre/dav/examples/sql/pgsql.locks.sql

@@ -4,10 +4,16 @@ CREATE TABLE locks (
     timeout INTEGER,
     created INTEGER,
     token VARCHAR(100),
-    scope smallint,
-    depth smallint,
-    uri text
+    scope SMALLINT,
+    depth SMALLINT,
+    uri TEXT
 );
 
 ALTER TABLE ONLY locks
     ADD CONSTRAINT locks_pkey PRIMARY KEY (id);
+
+CREATE INDEX locks_token_ix
+    ON locks USING btree (token);
+
+CREATE INDEX locks_uri_ix
+    ON locks USING btree (uri);

vendor/sabre/dav/examples/sql/pgsql.principals.sql

@@ -1,9 +1,8 @@
 CREATE TABLE principals (
     id SERIAL NOT NULL,
-    uri VARCHAR(100) NOT NULL,
+    uri VARCHAR(200) NOT NULL,
     email VARCHAR(80),
-    displayname VARCHAR(80),
-    vcardurl VARCHAR(255)
+    displayname VARCHAR(80)
 );
 
 ALTER TABLE ONLY principals
@@ -28,10 +27,9 @@ ALTER TABLE ONLY groupmembers
     ADD CONSTRAINT groupmembers_principal_id_fkey FOREIGN KEY (principal_id) REFERENCES principals(id)
         ON DELETE CASCADE;
 
--- Is this correct correct link ... or not?
--- ALTER TABLE ONLY groupmembers
---     ADD CONSTRAINT groupmembers_member_id_id_fkey FOREIGN KEY (member_id) REFERENCES users(id)
---         ON DELETE CASCADE;
+ALTER TABLE ONLY groupmembers
+    ADD CONSTRAINT groupmembers_member_id_id_fkey FOREIGN KEY (member_id) REFERENCES principals(id)
+        ON DELETE CASCADE;
 
 INSERT INTO principals (uri,email,displayname) VALUES
 ('principals/admin', 'admin@example.org','Administrator'),

vendor/sabre/dav/examples/sql/pgsql.users.sql

@@ -1,8 +1,7 @@
 CREATE TABLE users (
     id SERIAL NOT NULL,
     username VARCHAR(50),
-    digesta1 VARCHAR(32),
-    UNIQUE(username)
+    digesta1 VARCHAR(32)
 );
 
 ALTER TABLE ONLY users

vendor/sabre/dav/examples/sql/sqlite.addressbooks.sql

@@ -1,17 +1,28 @@
 CREATE TABLE addressbooks (
-    id integer primary key asc,
-    principaluri text,
+    id integer primary key asc NOT NULL,
+    principaluri text NOT NULL,
     displayname text,
-    uri text,
+    uri text NOT NULL,
     description text,
-	ctag integer
+    synctoken integer DEFAULT 1 NOT NULL
 );
 
 CREATE TABLE cards (
-	id integer primary key asc,
-    addressbookid integer,
+    id integer primary key asc NOT NULL,
+    addressbookid integer NOT NULL,
     carddata blob,
-    uri text,
-    lastmodified integer
+    uri text NOT NULL,
+    lastmodified integer,
+    etag text,
+    size integer
 );
 
+CREATE TABLE addressbookchanges (
+    id integer primary key asc NOT NULL,
+    uri text,
+    synctoken integer NOT NULL,
+    addressbookid integer NOT NULL,
+    operation integer NOT NULL
+);
+
+CREATE INDEX addressbookid_synctoken ON addressbookchanges (addressbookid, synctoken);

vendor/sabre/dav/examples/sql/sqlite.calendars.sql

@@ -1,26 +1,64 @@
 CREATE TABLE calendarobjects (
-    id integer primary key asc,
-    calendardata blob,
-    uri text,
-    calendarid integer,
-    lastmodified integer,
-    etag text,
-    size integer,
+    id integer primary key asc NOT NULL,
+    calendardata blob NOT NULL,
+    uri text NOT NULL,
+    calendarid integer NOT NULL,
+    lastmodified integer NOT NULL,
+    etag text NOT NULL,
+    size integer NOT NULL,
     componenttype text,
     firstoccurence integer,
-    lastoccurence integer
+    lastoccurence integer,
+    uid text
 );
 
 CREATE TABLE calendars (
-    id integer primary key asc,
-    principaluri text,
+    id integer primary key asc NOT NULL,
+    principaluri text NOT NULL,
     displayname text,
-    uri text,
-    ctag integer,
+    uri text NOT NULL,
+    synctoken integer DEFAULT 1 NOT NULL,
     description text,
     calendarorder integer,
     calendarcolor text,
     timezone text,
-    components text,
+    components text NOT NULL,
     transparent bool
 );
+
+CREATE TABLE calendarchanges (
+    id integer primary key asc NOT NULL,
+    uri text,
+    synctoken integer NOT NULL,
+    calendarid integer NOT NULL,
+    operation integer NOT NULL
+);
+
+CREATE INDEX calendarid_synctoken ON calendarchanges (calendarid, synctoken);
+
+CREATE TABLE calendarsubscriptions (
+    id integer primary key asc NOT NULL,
+    uri text NOT NULL,
+    principaluri text NOT NULL,
+    source text NOT NULL,
+    displayname text,
+    refreshrate text,
+    calendarorder integer,
+    calendarcolor text,
+    striptodos bool,
+    stripalarms bool,
+    stripattachments bool,
+    lastmodified int
+);
+
+CREATE TABLE schedulingobjects (
+    id integer primary key asc NOT NULL,
+    principaluri text NOT NULL,
+    calendardata blob,
+    uri text NOT NULL,
+    lastmodified integer,
+    etag text NOT NULL,
+    size integer NOT NULL
+);
+
+CREATE INDEX principaluri_uri ON calendarsubscriptions (principaluri, uri);

vendor/sabre/dav/examples/sql/sqlite.locks.sql

@@ -1,6 +1,6 @@
 BEGIN TRANSACTION;
 CREATE TABLE locks (
-	id integer primary key asc,
+	id integer primary key asc NOT NULL,
 	owner text,
 	timeout integer,
 	created integer,

vendor/sabre/dav/examples/sql/sqlite.principals.sql

@@ -1,16 +1,15 @@
 CREATE TABLE principals (
-    id INTEGER PRIMARY KEY ASC,
-    uri TEXT,
+    id INTEGER PRIMARY KEY ASC NOT NULL,
+    uri TEXT NOT NULL,
     email TEXT,
     displayname TEXT,
-    vcardurl TEXT,
     UNIQUE(uri)
 );
 
 CREATE TABLE groupmembers (
-    id INTEGER PRIMARY KEY ASC,
-    principal_id INTEGER,
-    member_id INTEGER,
+    id INTEGER PRIMARY KEY ASC NOT NULL,
+    principal_id INTEGER NOT NULL,
+    member_id INTEGER NOT NULL,
     UNIQUE(principal_id, member_id)
 );
 

vendor/sabre/dav/examples/sql/sqlite.users.sql

@@ -1,7 +1,7 @@
 CREATE TABLE users (
-	id integer primary key asc,
-	username TEXT,
-	digesta1 TEXT,
+	id integer primary key asc NOT NULL,
+	username TEXT NOT NULL,
+	digesta1 TEXT NOT NULL,
 	UNIQUE(username)
 );
 

vendor/sabre/dav/examples/webserver/apache2_vhost.conf

@@ -23,10 +23,6 @@
     # This is also to prevent high memory usage
     php_flag always_populate_raw_post_data off
 
-    # This is almost a given, but magic quotes is *still* on on some
-    # linux distributions
-    php_flag magic_quotes_gpc off
-
     # SabreDAV is not compatible with mbstring function overloading
     php_flag mbstring.func_overload off
 

vendor/sabre/dav/lib/CalDAV/Backend/AbstractBackend.php

@@ -0,0 +1,226 @@
+<?php
+
+namespace Sabre\CalDAV\Backend;
+
+use Sabre\VObject;
+use Sabre\CalDAV;
+
+/**
+ * Abstract Calendaring backend. Extend this class to create your own backends.
+ *
+ * Checkout the BackendInterface for all the methods that must be implemented.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+abstract class AbstractBackend implements BackendInterface {
+
+    /**
+     * Updates properties for a calendar.
+     *
+     * The list of mutations is stored in a Sabre\DAV\PropPatch object.
+     * To do the actual updates, you must tell this object which properties
+     * you're going to process with the handle() method.
+     *
+     * Calling the handle method is like telling the PropPatch object "I
+     * promise I can handle updating this property".
+     *
+     * Read the PropPatch documenation for more info and examples.
+     *
+     * @param string $path
+     * @param \Sabre\DAV\PropPatch $propPatch
+     * @return void
+     */
+    function updateCalendar($calendarId, \Sabre\DAV\PropPatch $propPatch) {
+
+    }
+
+    /**
+     * Returns a list of calendar objects.
+     *
+     * This method should work identical to getCalendarObject, but instead
+     * return all the calendar objects in the list as an array.
+     *
+     * If the backend supports this, it may allow for some speed-ups.
+     *
+     * @param mixed $calendarId
+     * @param array $uris
+     * @return array
+     */
+    function getMultipleCalendarObjects($calendarId, array $uris) {
+
+        return array_map(function($uri) use ($calendarId) {
+            return $this->getCalendarObject($calendarId, $uri);
+        }, $uris);
+
+    }
+
+    /**
+     * Performs a calendar-query on the contents of this calendar.
+     *
+     * The calendar-query is defined in RFC4791 : CalDAV. Using the
+     * calendar-query it is possible for a client to request a specific set of
+     * object, based on contents of iCalendar properties, date-ranges and
+     * iCalendar component types (VTODO, VEVENT).
+     *
+     * This method should just return a list of (relative) urls that match this
+     * query.
+     *
+     * The list of filters are specified as an array. The exact array is
+     * documented by \Sabre\CalDAV\CalendarQueryParser.
+     *
+     * Note that it is extremely likely that getCalendarObject for every path
+     * returned from this method will be called almost immediately after. You
+     * may want to anticipate this to speed up these requests.
+     *
+     * This method provides a default implementation, which parses *all* the
+     * iCalendar objects in the specified calendar.
+     *
+     * This default may well be good enough for personal use, and calendars
+     * that aren't very large. But if you anticipate high usage, big calendars
+     * or high loads, you are strongly adviced to optimize certain paths.
+     *
+     * The best way to do so is override this method and to optimize
+     * specifically for 'common filters'.
+     *
+     * Requests that are extremely common are:
+     *   * requests for just VEVENTS
+     *   * requests for just VTODO
+     *   * requests with a time-range-filter on either VEVENT or VTODO.
+     *
+     * ..and combinations of these requests. It may not be worth it to try to
+     * handle every possible situation and just rely on the (relatively
+     * easy to use) CalendarQueryValidator to handle the rest.
+     *
+     * Note that especially time-range-filters may be difficult to parse. A
+     * time-range filter specified on a VEVENT must for instance also handle
+     * recurrence rules correctly.
+     * A good example of how to interprete all these filters can also simply
+     * be found in \Sabre\CalDAV\CalendarQueryFilter. This class is as correct
+     * as possible, so it gives you a good idea on what type of stuff you need
+     * to think of.
+     *
+     * @param mixed $calendarId
+     * @param array $filters
+     * @return array
+     */
+    function calendarQuery($calendarId, array $filters) {
+
+        $result = [];
+        $objects = $this->getCalendarObjects($calendarId);
+
+        foreach ($objects as $object) {
+
+            if ($this->validateFilterForObject($object, $filters)) {
+                $result[] = $object['uri'];
+            }
+
+        }
+
+        return $result;
+
+    }
+
+    /**
+     * This method validates if a filter (as passed to calendarQuery) matches
+     * the given object.
+     *
+     * @param array $object
+     * @param array $filters
+     * @return bool
+     */
+    protected function validateFilterForObject(array $object, array $filters) {
+
+        // Unfortunately, setting the 'calendardata' here is optional. If
+        // it was excluded, we actually need another call to get this as
+        // well.
+        if (!isset($object['calendardata'])) {
+            $object = $this->getCalendarObject($object['calendarid'], $object['uri']);
+        }
+
+        $vObject = VObject\Reader::read($object['calendardata']);
+
+        $validator = new CalDAV\CalendarQueryValidator();
+        $result = $validator->validate($vObject, $filters);
+
+        // Destroy circular references so PHP will GC the object.
+        $vObject->destroy();
+
+        return $result;
+
+    }
+
+    /**
+     * Searches through all of a users calendars and calendar objects to find
+     * an object with a specific UID.
+     *
+     * This method should return the path to this object, relative to the
+     * calendar home, so this path usually only contains two parts:
+     *
+     * calendarpath/objectpath.ics
+     *
+     * If the uid is not found, return null.
+     *
+     * This method should only consider * objects that the principal owns, so
+     * any calendars owned by other principals that also appear in this
+     * collection should be ignored.
+     *
+     * @param string $principalUri
+     * @param string $uid
+     * @return string|null
+     */
+    function getCalendarObjectByUID($principalUri, $uid) {
+
+        // Note: this is a super slow naive implementation of this method. You
+        // are highly recommended to optimize it, if your backend allows it.
+        foreach ($this->getCalendarsForUser($principalUri) as $calendar) {
+
+            // We must ignore calendars owned by other principals.
+            if ($calendar['principaluri'] !== $principalUri) {
+                continue;
+            }
+
+            // Ignore calendars that are shared.
+            if (isset($calendar['{http://sabredav.org/ns}owner-principal']) && $calendar['{http://sabredav.org/ns}owner-principal'] !== $principalUri) {
+                continue;
+            }
+
+            $results = $this->calendarQuery(
+                $calendar['id'],
+                [
+                    'name'         => 'VCALENDAR',
+                    'prop-filters' => [],
+                    'comp-filters' => [
+                        [
+                            'name'           => 'VEVENT',
+                            'is-not-defined' => false,
+                            'time-range'     => null,
+                            'comp-filters'   => [],
+                            'prop-filters'   => [
+                                [
+                                    'name'           => 'UID',
+                                    'is-not-defined' => false,
+                                    'time-range'     => null,
+                                    'text-match'     => [
+                                        'value'            => $uid,
+                                        'negate-condition' => false,
+                                        'collation'        => 'i;octet',
+                                    ],
+                                    'param-filters' => [],
+                                ],
+                            ]
+                        ]
+                    ],
+                ]
+            );
+            if ($results) {
+                // We have a match
+                return $calendar['uri'] . '/' . $results[0];
+            }
+
+        }
+
+    }
+
+}

vendor/sabre/dav/lib/CalDAV/Backend/BackendInterface.php

@@ -5,7 +5,7 @@ namespace Sabre\CalDAV\Backend;
 /**
  * Every CalDAV backend must at least implement this interface.
  *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
@@ -17,7 +17,7 @@ interface BackendInterface {
      * Every project is an array with the following keys:
      *  * id, a unique id that will be used by other functions to modify the
      *    calendar. This can be the same as the uri or a database key.
-     *  * uri, which the basename of the uri with which the calendar is
+     *  * uri, which is the basename of the uri with which the calendar is
      *    accessed.
      *  * principaluri. The owner of the calendar. Almost always the same as
      *    principalUri passed to this method.
@@ -25,82 +25,74 @@ interface BackendInterface {
      * Furthermore it can contain webdav properties in clark notation. A very
      * common one is '{DAV:}displayname'.
      *
+     * Many clients also require:
+     * {urn:ietf:params:xml:ns:caldav}supported-calendar-component-set
+     * For this property, you can just return an instance of
+     * Sabre\CalDAV\Property\SupportedCalendarComponentSet.
+     *
+     * If you return {http://sabredav.org/ns}read-only and set the value to 1,
+     * ACL will automatically be put in read-only mode.
+     *
      * @param string $principalUri
      * @return array
      */
-    public function getCalendarsForUser($principalUri);
+    function getCalendarsForUser($principalUri);
 
     /**
      * Creates a new calendar for a principal.
      *
-     * If the creation was a success, an id must be returned that can be used to reference
-     * this calendar in other methods, such as updateCalendar.
+     * If the creation was a success, an id must be returned that can be used to
+     * reference this calendar in other methods, such as updateCalendar.
      *
      * @param string $principalUri
      * @param string $calendarUri
      * @param array $properties
      * @return void
      */
-    public function createCalendar($principalUri,$calendarUri,array $properties);
+    function createCalendar($principalUri, $calendarUri, array $properties);
 
     /**
      * Updates properties for a calendar.
      *
-     * The mutations array uses the propertyName in clark-notation as key,
-     * and the array value for the property value. In the case a property
-     * should be deleted, the property value will be null.
+     * The list of mutations is stored in a Sabre\DAV\PropPatch object.
+     * To do the actual updates, you must tell this object which properties
+     * you're going to process with the handle() method.
      *
-     * This method must be atomic. If one property cannot be changed, the
-     * entire operation must fail.
+     * Calling the handle method is like telling the PropPatch object "I
+     * promise I can handle updating this property".
      *
-     * If the operation was successful, true can be returned.
-     * If the operation failed, false can be returned.
+     * Read the PropPatch documentation for more info and examples.
      *
-     * Deletion of a non-existent property is always successful.
-     *
-     * Lastly, it is optional to return detailed information about any
-     * failures. In this case an array should be returned with the following
-     * structure:
-     *
-     * array(
-     *   403 => array(
-     *      '{DAV:}displayname' => null,
-     *   ),
-     *   424 => array(
-     *      '{DAV:}owner' => null,
-     *   )
-     * )
-     *
-     * In this example it was forbidden to update {DAV:}displayname.
-     * (403 Forbidden), which in turn also caused {DAV:}owner to fail
-     * (424 Failed Dependency) because the request needs to be atomic.
-     *
-     * @param mixed $calendarId
-     * @param array $mutations
-     * @return bool|array
+     * @param string $path
+     * @param \Sabre\DAV\PropPatch $propPatch
+     * @return void
      */
-    public function updateCalendar($calendarId, array $mutations);
+    function updateCalendar($calendarId, \Sabre\DAV\PropPatch $propPatch);
 
     /**
-     * Delete a calendar and all it's objects
+     * Delete a calendar and all its objects
      *
      * @param mixed $calendarId
      * @return void
      */
-    public function deleteCalendar($calendarId);
+    function deleteCalendar($calendarId);
 
     /**
      * Returns all calendar objects within a calendar.
      *
      * Every item contains an array with the following keys:
-     *   * id - unique identifier which will be used for subsequent updates
      *   * calendardata - The iCalendar-compatible calendar data
-     *   * uri - a unique key which will be used to construct the uri. This can be any arbitrary string.
+     *   * uri - a unique key which will be used to construct the uri. This can
+     *     be any arbitrary string, but making sure it ends with '.ics' is a
+     *     good idea. This is only the basename, or filename, not the full
+     *     path.
      *   * lastmodified - a timestamp of the last modification time
      *   * etag - An arbitrary string, surrounded by double-quotes. (e.g.:
      *   '"abcdef"')
-     *   * calendarid - The calendarid as it was passed to this function.
      *   * size - The size of the calendar objects, in bytes.
+     *   * component - optional, a string containing the type of object, such
+     *     as 'vevent' or 'vtodo'. If specified, this will be used to populate
+     *     the Content-Type header.
      *
      * Note that the etag is optional, but it's highly encouraged to return for
      * speed reasons.
@@ -116,12 +108,14 @@ interface BackendInterface {
      * @param mixed $calendarId
      * @return array
      */
-    public function getCalendarObjects($calendarId);
+    function getCalendarObjects($calendarId);
 
     /**
      * Returns information from a single calendar object, based on it's object
      * uri.
      *
+     * The object uri is only the basename, or filename and not a full path.
+     *
      * The returned array must have the same keys as getCalendarObjects. The
      * 'calendardata' object is required here though, while it's not required
      * for getCalendarObjects.
@@ -132,14 +126,30 @@ interface BackendInterface {
      * @param string $objectUri
      * @return array|null
      */
-    public function getCalendarObject($calendarId,$objectUri);
+    function getCalendarObject($calendarId, $objectUri);
+
+    /**
+     * Returns a list of calendar objects.
+     *
+     * This method should work identical to getCalendarObject, but instead
+     * return all the calendar objects in the list as an array.
+     *
+     * If the backend supports this, it may allow for some speed-ups.
+     *
+     * @param mixed $calendarId
+     * @param array $uris
+     * @return array
+     */
+    function getMultipleCalendarObjects($calendarId, array $uris);
 
     /**
      * Creates a new calendar object.
      *
-     * It is possible return an etag from this function, which will be used in
-     * the response to this PUT request. Note that the ETag must be surrounded
-     * by double-quotes.
+     * The object uri is only the basename, or filename and not a full path.
+     *
+     * It is possible to return an etag from this function, which will be used
+     * in the response to this PUT request. Note that the ETag must be
+     * surrounded by double-quotes.
      *
      * However, you should only really return this ETag if you don't mangle the
      * calendar-data. If the result of a subsequent GET to this object is not
@@ -150,11 +160,13 @@ interface BackendInterface {
      * @param string $calendarData
      * @return string|null
      */
-    public function createCalendarObject($calendarId,$objectUri,$calendarData);
+    function createCalendarObject($calendarId, $objectUri, $calendarData);
 
     /**
      * Updates an existing calendarobject, based on it's uri.
      *
+     * The object uri is only the basename, or filename and not a full path.
+     *
      * It is possible return an etag from this function, which will be used in
      * the response to this PUT request. Note that the ETag must be surrounded
      * by double-quotes.
@@ -168,16 +180,18 @@ interface BackendInterface {
      * @param string $calendarData
      * @return string|null
      */
-    public function updateCalendarObject($calendarId,$objectUri,$calendarData);
+    function updateCalendarObject($calendarId, $objectUri, $calendarData);
 
     /**
      * Deletes an existing calendar object.
      *
+     * The object uri is only the basename, or filename and not a full path.
+     *
      * @param mixed $calendarId
      * @param string $objectUri
      * @return void
      */
-    public function deleteCalendarObject($calendarId,$objectUri);
+    function deleteCalendarObject($calendarId, $objectUri);
 
     /**
      * Performs a calendar-query on the contents of this calendar.
@@ -228,6 +242,27 @@ interface BackendInterface {
      * @param array $filters
      * @return array
      */
-    public function calendarQuery($calendarId, array $filters);
+    function calendarQuery($calendarId, array $filters);
+
+    /**
+     * Searches through all of a users calendars and calendar objects to find
+     * an object with a specific UID.
+     *
+     * This method should return the path to this object, relative to the
+     * calendar home, so this path usually only contains two parts:
+     *
+     * calendarpath/objectpath.ics
+     *
+     * If the uid is not found, return null.
+     *
+     * This method should only consider * objects that the principal owns, so
+     * any calendars owned by other principals that also appear in this
+     * collection should be ignored.
+     *
+     * @param string $principalUri
+     * @param string $uid
+     * @return string|null
+     */
+    function getCalendarObjectByUID($principalUri, $uid);
 
 }

vendor/sabre/dav/lib/CalDAV/Backend/NotificationSupport.php

@@ -2,6 +2,8 @@
 
 namespace Sabre\CalDAV\Backend;
 
+use Sabre\CalDAV\Xml\Notification\NotificationInterface;
+
 /**
  * Adds caldav notification support to a backend.
  *
@@ -16,7 +18,7 @@ namespace Sabre\CalDAV\Backend;
  *
  * The primary usecase is to allow for calendar-sharing.
  *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
@@ -25,13 +27,10 @@ interface NotificationSupport extends BackendInterface {
     /**
      * Returns a list of notifications for a given principal url.
      *
-     * The returned array should only consist of implementations of
-     * \Sabre\CalDAV\Notifications\INotificationType.
-     *
      * @param string $principalUri
-     * @return array
+     * @return NotificationInterface[]
      */
-    public function getNotificationsForPrincipal($principalUri);
+    function getNotificationsForPrincipal($principalUri);
 
     /**
      * This deletes a specific notifcation.
@@ -39,9 +38,9 @@ interface NotificationSupport extends BackendInterface {
      * This may be called by a client once it deems a notification handled.
      *
      * @param string $principalUri
-     * @param \Sabre\CalDAV\Notifications\INotificationType $notification
+     * @param NotificationInterface $notification
      * @return void
      */
-    public function deleteNotification($principalUri, \Sabre\CalDAV\Notifications\INotificationType $notification);
+    function deleteNotification($principalUri, NotificationInterface $notification);
 
 }

vendor/sabre/dav/lib/CalDAV/Backend/SchedulingSupport.php

@@ -0,0 +1,65 @@
+<?php
+
+namespace Sabre\CalDAV\Backend;
+
+/**
+ * Implementing this interface adds CalDAV Scheduling support to your caldav
+ * server, as defined in rfc6638.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+interface SchedulingSupport extends BackendInterface {
+
+    /**
+     * Returns a single scheduling object for the inbox collection.
+     *
+     * The returned array should contain the following elements:
+     *   * uri - A unique basename for the object. This will be used to
+     *           construct a full uri.
+     *   * calendardata - The iCalendar object
+     *   * lastmodified - The last modification date. Can be an int for a unix
+     *                    timestamp, or a PHP DateTime object.
+     *   * etag - A unique token that must change if the object changed.
+     *   * size - The size of the object, in bytes.
+     *
+     * @param string $principalUri
+     * @param string $objectUri
+     * @return array
+     */
+    function getSchedulingObject($principalUri, $objectUri);
+
+    /**
+     * Returns all scheduling objects for the inbox collection.
+     *
+     * These objects should be returned as an array. Every item in the array
+     * should follow the same structure as returned from getSchedulingObject.
+     *
+     * The main difference is that 'calendardata' is optional.
+     *
+     * @param string $principalUri
+     * @return array
+     */
+    function getSchedulingObjects($principalUri);
+
+    /**
+     * Deletes a scheduling object from the inbox collection.
+     *
+     * @param string $principalUri
+     * @param string $objectUri
+     * @return void
+     */
+    function deleteSchedulingObject($principalUri, $objectUri);
+
+    /**
+     * Creates a new scheduling object. This should land in a users' inbox.
+     *
+     * @param string $principalUri
+     * @param string $objectUri
+     * @param string $objectData
+     * @return void
+     */
+    function createSchedulingObject($principalUri, $objectUri, $objectData);
+
+}

vendor/sabre/dav/lib/CalDAV/Backend/SharingSupport.php

@@ -70,7 +70,7 @@ namespace Sabre\CalDAV\Backend;
  * In the case of an invite, the sharee may reply with an 'accept' or
  * 'decline'. These are always represented by:
  *
- * Sabre\CalDAV\Notifications\Notification\Invite
+ * Sabre\CalDAV\Notifications\Notification\InviteReply
  *
  *
  * Calendar access by sharees
@@ -136,7 +136,7 @@ namespace Sabre\CalDAV\Backend;
  *   * unpublished
  *
  * If a calendar is published, the following property should be returned
- * for each calendar in getCalendarsForPrincipal.
+ * for each calendar in getCalendarsForUser.
  *
  * {http://calendarserver.org/ns/}publish-url
  *
@@ -157,7 +157,7 @@ namespace Sabre\CalDAV\Backend;
  * ==============================================
  *
  * If Sabre\CalDAV\Property\AllowedSharingModes is returned from
- * getCalendarsByUser, this allows the server to specify whether either sharing,
+ * getCalendarsForUser, this allows the server to specify whether either sharing,
  * or publishing is supported.
  *
  * This allows a client to determine in advance which features are available,
@@ -165,7 +165,7 @@ namespace Sabre\CalDAV\Backend;
  * the backend, the SharingPlugin automatically injects it and assumes both
  * features are available.
  *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */

vendor/sabre/dav/lib/CalDAV/Backend/SubscriptionSupport.php

@@ -0,0 +1,89 @@
+<?php
+
+namespace Sabre\CalDAV\Backend;
+
+use Sabre\DAV;
+
+/**
+ * Every CalDAV backend must at least implement this interface.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+interface SubscriptionSupport extends BackendInterface {
+
+    /**
+     * Returns a list of subscriptions for a principal.
+     *
+     * Every subscription is an array with the following keys:
+     *  * id, a unique id that will be used by other functions to modify the
+     *    subscription. This can be the same as the uri or a database key.
+     *  * uri. This is just the 'base uri' or 'filename' of the subscription.
+     *  * principaluri. The owner of the subscription. Almost always the same as
+     *    principalUri passed to this method.
+     *
+     * Furthermore, all the subscription info must be returned too:
+     *
+     * 1. {DAV:}displayname
+     * 2. {http://apple.com/ns/ical/}refreshrate
+     * 3. {http://calendarserver.org/ns/}subscribed-strip-todos (omit if todos
+     *    should not be stripped).
+     * 4. {http://calendarserver.org/ns/}subscribed-strip-alarms (omit if alarms
+     *    should not be stripped).
+     * 5. {http://calendarserver.org/ns/}subscribed-strip-attachments (omit if
+     *    attachments should not be stripped).
+     * 6. {http://calendarserver.org/ns/}source (Must be a
+     *     Sabre\DAV\Property\Href).
+     * 7. {http://apple.com/ns/ical/}calendar-color
+     * 8. {http://apple.com/ns/ical/}calendar-order
+     * 9. {urn:ietf:params:xml:ns:caldav}supported-calendar-component-set
+     *    (should just be an instance of
+     *    Sabre\CalDAV\Property\SupportedCalendarComponentSet, with a bunch of
+     *    default components).
+     *
+     * @param string $principalUri
+     * @return array
+     */
+    function getSubscriptionsForUser($principalUri);
+
+    /**
+     * Creates a new subscription for a principal.
+     *
+     * If the creation was a success, an id must be returned that can be used to reference
+     * this subscription in other methods, such as updateSubscription.
+     *
+     * @param string $principalUri
+     * @param string $uri
+     * @param array $properties
+     * @return mixed
+     */
+    function createSubscription($principalUri, $uri, array $properties);
+
+    /**
+     * Updates a subscription
+     *
+     * The list of mutations is stored in a Sabre\DAV\PropPatch object.
+     * To do the actual updates, you must tell this object which properties
+     * you're going to process with the handle() method.
+     *
+     * Calling the handle method is like telling the PropPatch object "I
+     * promise I can handle updating this property".
+     *
+     * Read the PropPatch documenation for more info and examples.
+     *
+     * @param mixed $subscriptionId
+     * @param \Sabre\DAV\PropPatch $propPatch
+     * @return void
+     */
+    function updateSubscription($subscriptionId, DAV\PropPatch $propPatch);
+
+    /**
+     * Deletes a subscription.
+     *
+     * @param mixed $subscriptionId
+     * @return void
+     */
+    function deleteSubscription($subscriptionId);
+
+}

vendor/sabre/dav/lib/CalDAV/Backend/SyncSupport.php

@@ -0,0 +1,81 @@
+<?php
+
+namespace Sabre\CalDAV\Backend;
+
+/**
+ * WebDAV-sync support for CalDAV backends.
+ *
+ * In order for backends to advertise support for WebDAV-sync, this interface
+ * must be implemented.
+ *
+ * Implementing this can result in a significant reduction of bandwidth and CPU
+ * time.
+ *
+ * For this to work, you _must_ return a {http://sabredav.org/ns}sync-token
+ * property from getCalendarsFromUser.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+interface SyncSupport extends BackendInterface {
+
+    /**
+     * The getChanges method returns all the changes that have happened, since
+     * the specified syncToken in the specified calendar.
+     *
+     * This function should return an array, such as the following:
+     *
+     * [
+     *   'syncToken' => 'The current synctoken',
+     *   'added'   => [
+     *      'new.txt',
+     *   ],
+     *   'modified'   => [
+     *      'modified.txt',
+     *   ],
+     *   'deleted' => [
+     *      'foo.php.bak',
+     *      'old.txt'
+     *   ]
+     * );
+     *
+     * The returned syncToken property should reflect the *current* syncToken
+     * of the calendar, as reported in the {http://sabredav.org/ns}sync-token
+     * property This is * needed here too, to ensure the operation is atomic.
+     *
+     * If the $syncToken argument is specified as null, this is an initial
+     * sync, and all members should be reported.
+     *
+     * The modified property is an array of nodenames that have changed since
+     * the last token.
+     *
+     * The deleted property is an array with nodenames, that have been deleted
+     * from collection.
+     *
+     * The $syncLevel argument is basically the 'depth' of the report. If it's
+     * 1, you only have to report changes that happened only directly in
+     * immediate descendants. If it's 2, it should also include changes from
+     * the nodes below the child collections. (grandchildren)
+     *
+     * The $limit argument allows a client to specify how many results should
+     * be returned at most. If the limit is not specified, it should be treated
+     * as infinite.
+     *
+     * If the limit (infinite or not) is higher than you're willing to return,
+     * you should throw a Sabre\DAV\Exception\TooMuchMatches() exception.
+     *
+     * If the syncToken is expired (due to data cleanup) or unknown, you must
+     * return null.
+     *
+     * The limit is 'suggestive'. You are free to ignore it.
+     *
+     * @param string $calendarId
+     * @param string $syncToken
+     * @param int $syncLevel
+     * @param int $limit
+     * @return array
+     */
+    function getChangesForCalendar($calendarId, $syncToken, $syncLevel, $limit = null);
+
+}

vendor/sabre/dav/lib/CalDAV/Calendar.php

@@ -0,0 +1,527 @@
+<?php
+
+namespace Sabre\CalDAV;
+
+use Sabre\DAV;
+use Sabre\DAVACL;
+use Sabre\DAV\PropPatch;
+
+/**
+ * This object represents a CalDAV calendar.
+ *
+ * A calendar can contain multiple TODO and or Events. These are represented
+ * as \Sabre\CalDAV\CalendarObject objects.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class Calendar implements ICalendar, DAV\IProperties, DAV\Sync\ISyncCollection, DAV\IMultiGet {
+
+    /**
+     * This is an array with calendar information
+     *
+     * @var array
+     */
+    protected $calendarInfo;
+
+    /**
+     * CalDAV backend
+     *
+     * @var Backend\BackendInterface
+     */
+    protected $caldavBackend;
+
+    /**
+     * Constructor
+     *
+     * @param Backend\BackendInterface $caldavBackend
+     * @param array $calendarInfo
+     */
+    function __construct(Backend\BackendInterface $caldavBackend, $calendarInfo) {
+
+        $this->caldavBackend = $caldavBackend;
+        $this->calendarInfo = $calendarInfo;
+
+    }
+
+    /**
+     * Returns the name of the calendar
+     *
+     * @return string
+     */
+    function getName() {
+
+        return $this->calendarInfo['uri'];
+
+    }
+
+    /**
+     * Updates properties on this node.
+     *
+     * This method received a PropPatch object, which contains all the
+     * information about the update.
+     *
+     * To update specific properties, call the 'handle' method on this object.
+     * Read the PropPatch documentation for more information.
+     *
+     * @param PropPatch $propPatch
+     * @return void
+     */
+    function propPatch(PropPatch $propPatch) {
+
+        return $this->caldavBackend->updateCalendar($this->calendarInfo['id'], $propPatch);
+
+    }
+
+    /**
+     * Returns the list of properties
+     *
+     * @param array $requestedProperties
+     * @return array
+     */
+    function getProperties($requestedProperties) {
+
+        $response = [];
+
+        foreach ($this->calendarInfo as $propName => $propValue) {
+
+            if ($propName[0] === '{')
+                $response[$propName] = $this->calendarInfo[$propName];
+
+        }
+        return $response;
+
+    }
+
+    /**
+     * Returns a calendar object
+     *
+     * The contained calendar objects are for example Events or Todo's.
+     *
+     * @param string $name
+     * @return \Sabre\CalDAV\ICalendarObject
+     */
+    function getChild($name) {
+
+        $obj = $this->caldavBackend->getCalendarObject($this->calendarInfo['id'], $name);
+
+        if (!$obj) throw new DAV\Exception\NotFound('Calendar object not found');
+
+        $obj['acl'] = $this->getChildACL();
+
+        return new CalendarObject($this->caldavBackend, $this->calendarInfo, $obj);
+
+    }
+
+    /**
+     * Returns the full list of calendar objects
+     *
+     * @return array
+     */
+    function getChildren() {
+
+        $objs = $this->caldavBackend->getCalendarObjects($this->calendarInfo['id']);
+        $children = [];
+        foreach ($objs as $obj) {
+            $obj['acl'] = $this->getChildACL();
+            $children[] = new CalendarObject($this->caldavBackend, $this->calendarInfo, $obj);
+        }
+        return $children;
+
+    }
+
+    /**
+     * This method receives a list of paths in it's first argument.
+     * It must return an array with Node objects.
+     *
+     * If any children are not found, you do not have to return them.
+     *
+     * @param string[] $paths
+     * @return array
+     */
+    function getMultipleChildren(array $paths) {
+
+        $objs = $this->caldavBackend->getMultipleCalendarObjects($this->calendarInfo['id'], $paths);
+        $children = [];
+        foreach ($objs as $obj) {
+            $obj['acl'] = $this->getChildACL();
+            $children[] = new CalendarObject($this->caldavBackend, $this->calendarInfo, $obj);
+        }
+        return $children;
+
+    }
+
+    /**
+     * Checks if a child-node exists.
+     *
+     * @param string $name
+     * @return bool
+     */
+    function childExists($name) {
+
+        $obj = $this->caldavBackend->getCalendarObject($this->calendarInfo['id'], $name);
+        if (!$obj)
+            return false;
+        else
+            return true;
+
+    }
+
+    /**
+     * Creates a new directory
+     *
+     * We actually block this, as subdirectories are not allowed in calendars.
+     *
+     * @param string $name
+     * @return void
+     */
+    function createDirectory($name) {
+
+        throw new DAV\Exception\MethodNotAllowed('Creating collections in calendar objects is not allowed');
+
+    }
+
+    /**
+     * Creates a new file
+     *
+     * The contents of the new file must be a valid ICalendar string.
+     *
+     * @param string $name
+     * @param resource $calendarData
+     * @return string|null
+     */
+    function createFile($name, $calendarData = null) {
+
+        if (is_resource($calendarData)) {
+            $calendarData = stream_get_contents($calendarData);
+        }
+        return $this->caldavBackend->createCalendarObject($this->calendarInfo['id'], $name, $calendarData);
+
+    }
+
+    /**
+     * Deletes the calendar.
+     *
+     * @return void
+     */
+    function delete() {
+
+        $this->caldavBackend->deleteCalendar($this->calendarInfo['id']);
+
+    }
+
+    /**
+     * Renames the calendar. Note that most calendars use the
+     * {DAV:}displayname to display a name to display a name.
+     *
+     * @param string $newName
+     * @return void
+     */
+    function setName($newName) {
+
+        throw new DAV\Exception\MethodNotAllowed('Renaming calendars is not yet supported');
+
+    }
+
+    /**
+     * Returns the last modification date as a unix timestamp.
+     *
+     * @return void
+     */
+    function getLastModified() {
+
+        return null;
+
+    }
+
+    /**
+     * Returns the owner principal
+     *
+     * This must be a url to a principal, or null if there's no owner
+     *
+     * @return string|null
+     */
+    function getOwner() {
+
+        return $this->calendarInfo['principaluri'];
+
+    }
+
+    /**
+     * Returns a group principal
+     *
+     * This must be a url to a principal, or null if there's no owner
+     *
+     * @return string|null
+     */
+    function getGroup() {
+
+        return null;
+
+    }
+
+    /**
+     * Returns a list of ACE's for this node.
+     *
+     * Each ACE has the following properties:
+     *   * 'privilege', a string such as {DAV:}read or {DAV:}write. These are
+     *     currently the only supported privileges
+     *   * 'principal', a url to the principal who owns the node
+     *   * 'protected' (optional), indicating that this ACE is not allowed to
+     *      be updated.
+     *
+     * @return array
+     */
+    function getACL() {
+
+        $acl = [
+            [
+                'privilege' => '{DAV:}read',
+                'principal' => $this->getOwner(),
+                'protected' => true,
+            ],
+            [
+                'privilege' => '{DAV:}read',
+                'principal' => $this->getOwner() . '/calendar-proxy-write',
+                'protected' => true,
+            ],
+            [
+                'privilege' => '{DAV:}read',
+                'principal' => $this->getOwner() . '/calendar-proxy-read',
+                'protected' => true,
+            ],
+            [
+                'privilege' => '{' . Plugin::NS_CALDAV . '}read-free-busy',
+                'principal' => '{DAV:}authenticated',
+                'protected' => true,
+            ],
+
+        ];
+        if (empty($this->calendarInfo['{http://sabredav.org/ns}read-only'])) {
+            $acl[] = [
+                'privilege' => '{DAV:}write',
+                'principal' => $this->getOwner(),
+                'protected' => true,
+            ];
+            $acl[] = [
+                'privilege' => '{DAV:}write',
+                'principal' => $this->getOwner() . '/calendar-proxy-write',
+                'protected' => true,
+            ];
+        }
+
+        return $acl;
+
+    }
+
+    /**
+     * This method returns the ACL's for calendar objects in this calendar.
+     * The result of this method automatically gets passed to the
+     * calendar-object nodes in the calendar.
+     *
+     * @return array
+     */
+    function getChildACL() {
+
+        $acl = [
+            [
+                'privilege' => '{DAV:}read',
+                'principal' => $this->getOwner(),
+                'protected' => true,
+            ],
+
+            [
+                'privilege' => '{DAV:}read',
+                'principal' => $this->getOwner() . '/calendar-proxy-write',
+                'protected' => true,
+            ],
+            [
+                'privilege' => '{DAV:}read',
+                'principal' => $this->getOwner() . '/calendar-proxy-read',
+                'protected' => true,
+            ],
+
+        ];
+        if (empty($this->calendarInfo['{http://sabredav.org/ns}read-only'])) {
+            $acl[] = [
+                'privilege' => '{DAV:}write',
+                'principal' => $this->getOwner(),
+                'protected' => true,
+            ];
+            $acl[] = [
+                'privilege' => '{DAV:}write',
+                'principal' => $this->getOwner() . '/calendar-proxy-write',
+                'protected' => true,
+            ];
+
+        }
+        return $acl;
+
+    }
+
+    /**
+     * Updates the ACL
+     *
+     * This method will receive a list of new ACE's.
+     *
+     * @param array $acl
+     * @return void
+     */
+    function setACL(array $acl) {
+
+        throw new DAV\Exception\MethodNotAllowed('Changing ACL is not yet supported');
+
+    }
+
+    /**
+     * Returns the list of supported privileges for this node.
+     *
+     * The returned data structure is a list of nested privileges.
+     * See \Sabre\DAVACL\Plugin::getDefaultSupportedPrivilegeSet for a simple
+     * standard structure.
+     *
+     * If null is returned from this method, the default privilege set is used,
+     * which is fine for most common usecases.
+     *
+     * @return array|null
+     */
+    function getSupportedPrivilegeSet() {
+
+        $default = DAVACL\Plugin::getDefaultSupportedPrivilegeSet();
+
+        // We need to inject 'read-free-busy' in the tree, aggregated under
+        // {DAV:}read.
+        foreach ($default['aggregates'] as &$agg) {
+
+            if ($agg['privilege'] !== '{DAV:}read') continue;
+
+            $agg['aggregates'][] = [
+                'privilege' => '{' . Plugin::NS_CALDAV . '}read-free-busy',
+            ];
+
+        }
+        return $default;
+
+    }
+
+    /**
+     * Performs a calendar-query on the contents of this calendar.
+     *
+     * The calendar-query is defined in RFC4791 : CalDAV. Using the
+     * calendar-query it is possible for a client to request a specific set of
+     * object, based on contents of iCalendar properties, date-ranges and
+     * iCalendar component types (VTODO, VEVENT).
+     *
+     * This method should just return a list of (relative) urls that match this
+     * query.
+     *
+     * The list of filters are specified as an array. The exact array is
+     * documented by Sabre\CalDAV\CalendarQueryParser.
+     *
+     * @param array $filters
+     * @return array
+     */
+    function calendarQuery(array $filters) {
+
+        return $this->caldavBackend->calendarQuery($this->calendarInfo['id'], $filters);
+
+    }
+
+    /**
+     * This method returns the current sync-token for this collection.
+     * This can be any string.
+     *
+     * If null is returned from this function, the plugin assumes there's no
+     * sync information available.
+     *
+     * @return string|null
+     */
+    function getSyncToken() {
+
+        if (
+            $this->caldavBackend instanceof Backend\SyncSupport &&
+            isset($this->calendarInfo['{DAV:}sync-token'])
+        ) {
+            return $this->calendarInfo['{DAV:}sync-token'];
+        }
+        if (
+            $this->caldavBackend instanceof Backend\SyncSupport &&
+            isset($this->calendarInfo['{http://sabredav.org/ns}sync-token'])
+        ) {
+            return $this->calendarInfo['{http://sabredav.org/ns}sync-token'];
+        }
+
+    }
+
+    /**
+     * The getChanges method returns all the changes that have happened, since
+     * the specified syncToken and the current collection.
+     *
+     * This function should return an array, such as the following:
+     *
+     * [
+     *   'syncToken' => 'The current synctoken',
+     *   'added'   => [
+     *      'new.txt',
+     *   ],
+     *   'modified'   => [
+     *      'modified.txt',
+     *   ],
+     *   'deleted' => [
+     *      'foo.php.bak',
+     *      'old.txt'
+     *   ]
+     * ];
+     *
+     * The syncToken property should reflect the *current* syncToken of the
+     * collection, as reported getSyncToken(). This is needed here too, to
+     * ensure the operation is atomic.
+     *
+     * If the syncToken is specified as null, this is an initial sync, and all
+     * members should be reported.
+     *
+     * The modified property is an array of nodenames that have changed since
+     * the last token.
+     *
+     * The deleted property is an array with nodenames, that have been deleted
+     * from collection.
+     *
+     * The second argument is basically the 'depth' of the report. If it's 1,
+     * you only have to report changes that happened only directly in immediate
+     * descendants. If it's 2, it should also include changes from the nodes
+     * below the child collections. (grandchildren)
+     *
+     * The third (optional) argument allows a client to specify how many
+     * results should be returned at most. If the limit is not specified, it
+     * should be treated as infinite.
+     *
+     * If the limit (infinite or not) is higher than you're willing to return,
+     * you should throw a Sabre\DAV\Exception\TooMuchMatches() exception.
+     *
+     * If the syncToken is expired (due to data cleanup) or unknown, you must
+     * return null.
+     *
+     * The limit is 'suggestive'. You are free to ignore it.
+     *
+     * @param string $syncToken
+     * @param int $syncLevel
+     * @param int $limit
+     * @return array
+     */
+    function getChanges($syncToken, $syncLevel, $limit = null) {
+
+        if (!$this->caldavBackend instanceof Backend\SyncSupport) {
+            return null;
+        }
+
+        return $this->caldavBackend->getChangesForCalendar(
+            $this->calendarInfo['id'],
+            $syncToken,
+            $syncLevel,
+            $limit
+        );
+
+    }
+
+}

vendor/sabre/dav/lib/CalDAV/CalendarHome.php

@@ -3,16 +3,24 @@
 namespace Sabre\CalDAV;
 
 use Sabre\DAV;
+use Sabre\DAV\Exception\NotFound;
+use Sabre\DAV\MkCol;
 use Sabre\DAVACL;
+use Sabre\HTTP\URLUtil;
 
 /**
- * The UserCalenders class contains all calendars associated to one user
+ * The CalendarHome represents a node that is usually in a users'
+ * calendar-homeset.
  *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
+ * It contains all the users' calendars, and can optionally contain a
+ * notifications collection, calendar subscriptions, a users' inbox, and a
+ * users' outbox.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class UserCalendars implements DAV\IExtendedCollection, DAVACL\IACL {
+class CalendarHome implements DAV\IExtendedCollection, DAVACL\IACL {
 
     /**
      * CalDAV backend
@@ -34,7 +42,7 @@ class UserCalendars implements DAV\IExtendedCollection, DAVACL\IACL {
      * @param Backend\BackendInterface $caldavBackend
      * @param mixed $userUri
      */
-    public function __construct(Backend\BackendInterface $caldavBackend, $principalInfo) {
+    function __construct(Backend\BackendInterface $caldavBackend, $principalInfo) {
 
         $this->caldavBackend = $caldavBackend;
         $this->principalInfo = $principalInfo;
@@ -46,9 +54,9 @@ class UserCalendars implements DAV\IExtendedCollection, DAVACL\IACL {
      *
      * @return string
      */
-    public function getName() {
+    function getName() {
 
-        list(,$name) = DAV\URLUtil::splitPath($this->principalInfo['uri']);
+        list(, $name) = URLUtil::splitPath($this->principalInfo['uri']);
         return $name;
 
     }
@@ -59,7 +67,7 @@ class UserCalendars implements DAV\IExtendedCollection, DAVACL\IACL {
      * @param string $name
      * @return void
      */
-    public function setName($name) {
+    function setName($name) {
 
         throw new DAV\Exception\Forbidden();
 
@@ -70,7 +78,7 @@ class UserCalendars implements DAV\IExtendedCollection, DAVACL\IACL {
      *
      * @return void
      */
-    public function delete() {
+    function delete() {
 
         throw new DAV\Exception\Forbidden();
 
@@ -81,7 +89,7 @@ class UserCalendars implements DAV\IExtendedCollection, DAVACL\IACL {
      *
      * @return int
      */
-    public function getLastModified() {
+    function getLastModified() {
 
         return null;
 
@@ -96,7 +104,7 @@ class UserCalendars implements DAV\IExtendedCollection, DAVACL\IACL {
      * @param resource $data
      * @return void
      */
-    public function createFile($filename, $data=null) {
+    function createFile($filename, $data = null) {
 
         throw new DAV\Exception\MethodNotAllowed('Creating new files in this collection is not supported');
 
@@ -110,7 +118,7 @@ class UserCalendars implements DAV\IExtendedCollection, DAVACL\IACL {
      * @param string $filename
      * @return void
      */
-    public function createDirectory($filename) {
+    function createDirectory($filename) {
 
         throw new DAV\Exception\MethodNotAllowed('Creating new collections in this collection is not supported');
 
@@ -120,17 +128,46 @@ class UserCalendars implements DAV\IExtendedCollection, DAVACL\IACL {
      * Returns a single calendar, by name
      *
      * @param string $name
-     * @todo needs optimizing
      * @return Calendar
      */
-    public function getChild($name) {
+    function getChild($name) {
 
-        foreach($this->getChildren() as $child) {
-            if ($name==$child->getName())
-                return $child;
+        // Special nodes
+        if ($name === 'inbox' && $this->caldavBackend instanceof Backend\SchedulingSupport) {
+            return new Schedule\Inbox($this->caldavBackend, $this->principalInfo['uri']);
+        }
+        if ($name === 'outbox' && $this->caldavBackend instanceof Backend\SchedulingSupport) {
+            return new Schedule\Outbox($this->principalInfo['uri']);
+        }
+        if ($name === 'notifications' && $this->caldavBackend instanceof Backend\NotificationSupport) {
+            return new Notifications\Collection($this->caldavBackend, $this->principalInfo['uri']);
+        }
+
+        // Calendars
+        foreach ($this->caldavBackend->getCalendarsForUser($this->principalInfo['uri']) as $calendar) {
+            if ($calendar['uri'] === $name) {
+                if ($this->caldavBackend instanceof Backend\SharingSupport) {
+                    if (isset($calendar['{http://calendarserver.org/ns/}shared-url'])) {
+                        return new SharedCalendar($this->caldavBackend, $calendar);
+                    } else {
+                        return new ShareableCalendar($this->caldavBackend, $calendar);
+                    }
+                } else {
+                    return new Calendar($this->caldavBackend, $calendar);
+                }
+            }
+        }
+
+        if ($this->caldavBackend instanceof Backend\SubscriptionSupport) {
+            foreach ($this->caldavBackend->getSubscriptionsForUser($this->principalInfo['uri']) as $subscription) {
+                if ($subscription['uri'] === $name) {
+                    return new Subscriptions\Subscription($this->caldavBackend, $subscription);
+                }
+            }
 
         }
-        throw new DAV\Exception\NotFound('Calendar with name \'' . $name . '\' could not be found');
+
+        throw new NotFound('Node with name \'' . $name . '\' could not be found');
 
     }
 
@@ -138,17 +175,15 @@ class UserCalendars implements DAV\IExtendedCollection, DAVACL\IACL {
      * Checks if a calendar exists.
      *
      * @param string $name
-     * @todo needs optimizing
      * @return bool
      */
-    public function childExists($name) {
+    function childExists($name) {
 
-        foreach($this->getChildren() as $child) {
-            if ($name==$child->getName())
-                return true;
-
-        }
+        try {
+            return !!$this->getChild($name);
+        } catch (NotFound $e) {
             return false;
+        }
 
     }
 
@@ -157,10 +192,10 @@ class UserCalendars implements DAV\IExtendedCollection, DAVACL\IACL {
      *
      * @return array
      */
-    public function getChildren() {
+    function getChildren() {
 
         $calendars = $this->caldavBackend->getCalendarsForUser($this->principalInfo['uri']);
-        $objs = array();
+        $objs = [];
         foreach ($calendars as $calendar) {
             if ($this->caldavBackend instanceof Backend\SharingSupport) {
                 if (isset($calendar['{http://calendarserver.org/ns/}shared-url'])) {
@@ -172,28 +207,41 @@ class UserCalendars implements DAV\IExtendedCollection, DAVACL\IACL {
                 $objs[] = new Calendar($this->caldavBackend, $calendar);
             }
         }
+
+        if ($this->caldavBackend instanceof Backend\SchedulingSupport) {
+            $objs[] = new Schedule\Inbox($this->caldavBackend, $this->principalInfo['uri']);
             $objs[] = new Schedule\Outbox($this->principalInfo['uri']);
+        }
 
         // We're adding a notifications node, if it's supported by the backend.
         if ($this->caldavBackend instanceof Backend\NotificationSupport) {
             $objs[] = new Notifications\Collection($this->caldavBackend, $this->principalInfo['uri']);
         }
+
+        // If the backend supports subscriptions, we'll add those as well,
+        if ($this->caldavBackend instanceof Backend\SubscriptionSupport) {
+            foreach ($this->caldavBackend->getSubscriptionsForUser($this->principalInfo['uri']) as $subscription) {
+                $objs[] = new Subscriptions\Subscription($this->caldavBackend, $subscription);
+            }
+        }
+
         return $objs;
 
     }
 
     /**
-     * Creates a new calendar
+     * Creates a new calendar or subscription.
      *
      * @param string $name
-     * @param array $resourceType
-     * @param array $properties
+     * @param MkCol $mkCol
+     * @throws DAV\Exception\InvalidResourceType
      * @return void
      */
-    public function createExtendedCollection($name, array $resourceType, array $properties) {
+    function createExtendedCollection($name, MkCol $mkCol) {
 
         $isCalendar = false;
-        foreach($resourceType as $rt) {
+        $isSubscription = false;
+        foreach ($mkCol->getResourceType() as $rt) {
             switch ($rt) {
                 case '{DAV:}collection' :
                 case '{http://calendarserver.org/ns/}shared-owner' :
@@ -202,15 +250,31 @@ class UserCalendars implements DAV\IExtendedCollection, DAVACL\IACL {
                 case '{urn:ietf:params:xml:ns:caldav}calendar' :
                     $isCalendar = true;
                     break;
+                case '{http://calendarserver.org/ns/}subscribed' :
+                    $isSubscription = true;
+                    break;
                 default :
                     throw new DAV\Exception\InvalidResourceType('Unknown resourceType: ' . $rt);
             }
         }
-        if (!$isCalendar) {
-            throw new DAV\Exception\InvalidResourceType('You can only create calendars in this collection');
+
+        $properties = $mkCol->getRemainingValues();
+        $mkCol->setRemainingResultCode(201);
+
+        if ($isSubscription) {
+            if (!$this->caldavBackend instanceof Backend\SubscriptionSupport) {
+                throw new DAV\Exception\InvalidResourceType('This backend does not support subscriptions');
             }
+            $this->caldavBackend->createSubscription($this->principalInfo['uri'], $name, $properties);
+
+        } elseif ($isCalendar) {
             $this->caldavBackend->createCalendar($this->principalInfo['uri'], $name, $properties);
 
+        } else {
+            throw new DAV\Exception\InvalidResourceType('You can only create calendars and subscriptions in this collection');
+
+        }
+
     }
 
     /**
@@ -220,7 +284,7 @@ class UserCalendars implements DAV\IExtendedCollection, DAVACL\IACL {
      *
      * @return string|null
      */
-    public function getOwner() {
+    function getOwner() {
 
         return $this->principalInfo['uri'];
 
@@ -233,7 +297,7 @@ class UserCalendars implements DAV\IExtendedCollection, DAVACL\IACL {
      *
      * @return string|null
      */
-    public function getGroup() {
+    function getGroup() {
 
         return null;
 
@@ -251,36 +315,36 @@ class UserCalendars implements DAV\IExtendedCollection, DAVACL\IACL {
      *
      * @return array
      */
-    public function getACL() {
+    function getACL() {
 
-        return array(
-            array(
+        return [
+            [
                 'privilege' => '{DAV:}read',
                 'principal' => $this->principalInfo['uri'],
                 'protected' => true,
-            ),
-            array(
+            ],
+            [
                 'privilege' => '{DAV:}write',
                 'principal' => $this->principalInfo['uri'],
                 'protected' => true,
-            ),
-            array(
+            ],
+            [
                 'privilege' => '{DAV:}read',
                 'principal' => $this->principalInfo['uri'] . '/calendar-proxy-write',
                 'protected' => true,
-            ),
-            array(
+            ],
+            [
                 'privilege' => '{DAV:}write',
                 'principal' => $this->principalInfo['uri'] . '/calendar-proxy-write',
                 'protected' => true,
-            ),
-            array(
+            ],
+            [
                 'privilege' => '{DAV:}read',
                 'principal' => $this->principalInfo['uri'] . '/calendar-proxy-read',
                 'protected' => true,
-            ),
+            ],
 
-        );
+        ];
 
     }
 
@@ -292,7 +356,7 @@ class UserCalendars implements DAV\IExtendedCollection, DAVACL\IACL {
      * @param array $acl
      * @return void
      */
-    public function setACL(array $acl) {
+    function setACL(array $acl) {
 
         throw new DAV\Exception\MethodNotAllowed('Changing ACL is not yet supported');
 
@@ -310,7 +374,7 @@ class UserCalendars implements DAV\IExtendedCollection, DAVACL\IACL {
      *
      * @return array|null
      */
-    public function getSupportedPrivilegeSet() {
+    function getSupportedPrivilegeSet() {
 
         return null;
 
@@ -329,7 +393,7 @@ class UserCalendars implements DAV\IExtendedCollection, DAVACL\IACL {
      * @param string $summary A description of the reply
      * @return null|string
      */
-    public function shareReply($href, $status, $calendarUri, $inReplyTo, $summary = null) {
+    function shareReply($href, $status, $calendarUri, $inReplyTo, $summary = null) {
 
         if (!$this->caldavBackend instanceof Backend\SharingSupport) {
             throw new DAV\Exception\NotImplemented('Sharing support is not implemented by this backend.');
@@ -339,4 +403,28 @@ class UserCalendars implements DAV\IExtendedCollection, DAVACL\IACL {
 
     }
 
+    /**
+     * Searches through all of a users calendars and calendar objects to find
+     * an object with a specific UID.
+     *
+     * This method should return the path to this object, relative to the
+     * calendar home, so this path usually only contains two parts:
+     *
+     * calendarpath/objectpath.ics
+     *
+     * If the uid is not found, return null.
+     *
+     * This method should only consider * objects that the principal owns, so
+     * any calendars owned by other principals that also appear in this
+     * collection should be ignored.
+     *
+     * @param string $uid
+     * @return string|null
+     */
+    function getCalendarObjectByUID($uid) {
+
+        return $this->caldavBackend->getCalendarObjectByUID($this->principalInfo['uri'], $uid);
+
+    }
+
 }

vendor/sabre/dav/lib/CalDAV/CalendarObject.php

@@ -5,7 +5,7 @@ namespace Sabre\CalDAV;
 /**
  * The CalendarObject represents a single VEVENT or VTODO within a Calendar.
  *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
@@ -35,17 +35,25 @@ class CalendarObject extends \Sabre\DAV\File implements ICalendarObject, \Sabre\
     /**
      * Constructor
      *
+     * The following properties may be passed within $objectData:
+     *
+     *   * calendarid - This must refer to a calendarid from a caldavBackend
+     *   * uri - A unique uri. Only the 'basename' must be passed.
+     *   * calendardata (optional) - The iCalendar data
+     *   * etag - (optional) The etag for this object, MUST be encloded with
+     *            double-quotes.
+     *   * size - (optional) The size of the data in bytes.
+     *   * lastmodified - (optional) format as a unix timestamp.
+     *   * acl - (optional) Use this to override the default ACL for the node.
+     *
      * @param Backend\BackendInterface $caldavBackend
      * @param array $calendarInfo
      * @param array $objectData
      */
-    public function __construct(Backend\BackendInterface $caldavBackend,array $calendarInfo,array $objectData) {
+    function __construct(Backend\BackendInterface $caldavBackend, array $calendarInfo, array $objectData) {
 
         $this->caldavBackend = $caldavBackend;
 
-        if (!isset($objectData['calendarid'])) {
-            throw new \InvalidArgumentException('The objectData argument must contain a \'calendarid\' property');
-        }
         if (!isset($objectData['uri'])) {
             throw new \InvalidArgumentException('The objectData argument must contain an \'uri\' property');
         }
@@ -60,7 +68,7 @@ class CalendarObject extends \Sabre\DAV\File implements ICalendarObject, \Sabre\
      *
      * @return string
      */
-    public function getName() {
+    function getName() {
 
         return $this->objectData['uri'];
 
@@ -71,12 +79,12 @@ class CalendarObject extends \Sabre\DAV\File implements ICalendarObject, \Sabre\
      *
      * @return string
      */
-    public function get() {
+    function get() {
 
         // Pre-populating the 'calendardata' is optional, if we don't have it
         // already we fetch it from the backend.
         if (!isset($this->objectData['calendardata'])) {
-            $this->objectData = $this->caldavBackend->getCalendarObject($this->objectData['calendarid'], $this->objectData['uri']);
+            $this->objectData = $this->caldavBackend->getCalendarObject($this->calendarInfo['id'], $this->objectData['uri']);
         }
         return $this->objectData['calendardata'];
 
@@ -88,7 +96,7 @@ class CalendarObject extends \Sabre\DAV\File implements ICalendarObject, \Sabre\
      * @param string|resource $calendarData
      * @return string
      */
-    public function put($calendarData) {
+    function put($calendarData) {
 
         if (is_resource($calendarData)) {
             $calendarData = stream_get_contents($calendarData);
@@ -106,7 +114,7 @@ class CalendarObject extends \Sabre\DAV\File implements ICalendarObject, \Sabre\
      *
      * @return void
      */
-    public function delete() {
+    function delete() {
 
         $this->caldavBackend->deleteCalendarObject($this->calendarInfo['id'], $this->objectData['uri']);
 
@@ -117,9 +125,13 @@ class CalendarObject extends \Sabre\DAV\File implements ICalendarObject, \Sabre\
      *
      * @return string
      */
-    public function getContentType() {
+    function getContentType() {
 
-        return 'text/calendar; charset=utf-8';
+        $mime = 'text/calendar; charset=utf-8';
+        if (isset($this->objectData['component']) && $this->objectData['component']) {
+            $mime .= '; component=' . $this->objectData['component'];
+        }
+        return $mime;
 
     }
 
@@ -130,7 +142,7 @@ class CalendarObject extends \Sabre\DAV\File implements ICalendarObject, \Sabre\
      *
      * @return string
      */
-    public function getETag() {
+    function getETag() {
 
         if (isset($this->objectData['etag'])) {
             return $this->objectData['etag'];
@@ -145,7 +157,7 @@ class CalendarObject extends \Sabre\DAV\File implements ICalendarObject, \Sabre\
      *
      * @return int
      */
-    public function getLastModified() {
+    function getLastModified() {
 
         return $this->objectData['lastmodified'];
 
@@ -156,7 +168,7 @@ class CalendarObject extends \Sabre\DAV\File implements ICalendarObject, \Sabre\
      *
      * @return int
      */
-    public function getSize() {
+    function getSize() {
 
         if (array_key_exists('size', $this->objectData)) {
             return $this->objectData['size'];
@@ -173,7 +185,7 @@ class CalendarObject extends \Sabre\DAV\File implements ICalendarObject, \Sabre\
      *
      * @return string|null
      */
-    public function getOwner() {
+    function getOwner() {
 
         return $this->calendarInfo['principaluri'];
 
@@ -186,7 +198,7 @@ class CalendarObject extends \Sabre\DAV\File implements ICalendarObject, \Sabre\
      *
      * @return string|null
      */
-    public function getGroup() {
+    function getGroup() {
 
         return null;
 
@@ -204,7 +216,7 @@ class CalendarObject extends \Sabre\DAV\File implements ICalendarObject, \Sabre\
      *
      * @return array
      */
-    public function getACL() {
+    function getACL() {
 
         // An alternative acl may be specified in the object data.
         if (isset($this->objectData['acl'])) {
@@ -212,34 +224,34 @@ class CalendarObject extends \Sabre\DAV\File implements ICalendarObject, \Sabre\
         }
 
         // The default ACL
-        return array(
-            array(
+        return [
+            [
                 'privilege' => '{DAV:}read',
                 'principal' => $this->calendarInfo['principaluri'],
                 'protected' => true,
-            ),
-            array(
+            ],
+            [
                 'privilege' => '{DAV:}write',
                 'principal' => $this->calendarInfo['principaluri'],
                 'protected' => true,
-            ),
-            array(
+            ],
+            [
                 'privilege' => '{DAV:}read',
                 'principal' => $this->calendarInfo['principaluri'] . '/calendar-proxy-write',
                 'protected' => true,
-            ),
-            array(
+            ],
+            [
                 'privilege' => '{DAV:}write',
                 'principal' => $this->calendarInfo['principaluri'] . '/calendar-proxy-write',
                 'protected' => true,
-            ),
-            array(
+            ],
+            [
                 'privilege' => '{DAV:}read',
                 'principal' => $this->calendarInfo['principaluri'] . '/calendar-proxy-read',
                 'protected' => true,
-            ),
+            ],
 
-        );
+        ];
 
     }
 
@@ -251,7 +263,7 @@ class CalendarObject extends \Sabre\DAV\File implements ICalendarObject, \Sabre\
      * @param array $acl
      * @return void
      */
-    public function setACL(array $acl) {
+    function setACL(array $acl) {
 
         throw new \Sabre\DAV\Exception\MethodNotAllowed('Changing ACL is not yet supported');
 
@@ -269,11 +281,10 @@ class CalendarObject extends \Sabre\DAV\File implements ICalendarObject, \Sabre\
      *
      * @return array|null
      */
-    public function getSupportedPrivilegeSet() {
+    function getSupportedPrivilegeSet() {
 
         return null;
 
     }
 
 }
-

vendor/sabre/dav/lib/CalDAV/CalendarQueryValidator.php

@@ -14,7 +14,7 @@ use DateTime;
  * This is used to determine which icalendar objects should be returned for a
  * calendar-query REPORT request.
  *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
@@ -29,7 +29,7 @@ class CalendarQueryValidator {
      * @param array $filters
      * @return bool
      */
-    public function validate(VObject\Component $vObject,array $filters) {
+    function validate(VObject\Component\VCalendar $vObject, array $filters) {
 
         // The top level object is always a component filter.
         // We'll parse it manually, as it's pretty simple.
@@ -59,7 +59,7 @@ class CalendarQueryValidator {
 
         foreach ($filters as $filter) {
 
-            $isDefined = isset($parent->$filter['name']);
+            $isDefined = isset($parent->{$filter['name']});
 
             if ($filter['is-not-defined']) {
 
@@ -75,7 +75,7 @@ class CalendarQueryValidator {
             }
 
             if ($filter['time-range']) {
-                foreach($parent->$filter['name'] as $subComponent) {
+                foreach ($parent->{$filter['name']} as $subComponent) {
                     if ($this->validateTimeRange($subComponent, $filter['time-range']['start'], $filter['time-range']['end'])) {
                         continue 2;
                     }
@@ -89,7 +89,7 @@ class CalendarQueryValidator {
 
             // If there are sub-filters, we need to find at least one component
             // for which the subfilters hold true.
-            foreach($parent->$filter['name'] as $subComponent) {
+            foreach ($parent->{$filter['name']} as $subComponent) {
 
                 if (
                     $this->validateCompFilters($subComponent, $filter['comp-filters']) &&
@@ -128,7 +128,7 @@ class CalendarQueryValidator {
 
         foreach ($filters as $filter) {
 
-            $isDefined = isset($parent->$filter['name']);
+            $isDefined = isset($parent->{$filter['name']});
 
             if ($filter['is-not-defined']) {
 
@@ -144,7 +144,7 @@ class CalendarQueryValidator {
             }
 
             if ($filter['time-range']) {
-                foreach($parent->$filter['name'] as $subComponent) {
+                foreach ($parent->{$filter['name']} as $subComponent) {
                     if ($this->validateTimeRange($subComponent, $filter['time-range']['start'], $filter['time-range']['end'])) {
                         continue 2;
                     }
@@ -158,7 +158,7 @@ class CalendarQueryValidator {
 
             // If there are sub-filters, we need to find at least one property
             // for which the subfilters hold true.
-            foreach($parent->$filter['name'] as $subComponent) {
+            foreach ($parent->{$filter['name']} as $subComponent) {
 
                 if (
                     $this->validateParamFilters($subComponent, $filter['param-filters']) &&
@@ -217,34 +217,17 @@ class CalendarQueryValidator {
                 continue;
             }
 
-            if (version_compare(VObject\Version::VERSION, '3.0.0beta1', '>=')) {
-
             // If there are sub-filters, we need to find at least one parameter
             // for which the subfilters hold true.
-                foreach($parent[$filter['name']]->getParts() as $subParam) {
+            foreach ($parent[$filter['name']]->getParts() as $paramPart) {
 
-                    if($this->validateTextMatch($subParam,$filter['text-match'])) {
+                if ($this->validateTextMatch($paramPart, $filter['text-match'])) {
                     // We had a match, so this param-filter succeeds
                     continue 2;
                 }
 
             }
 
-            } else {
-
-                // If there are sub-filters, we need to find at least one parameter
-                // for which the subfilters hold true.
-                foreach($parent[$filter['name']] as $subParam) {
-
-                    if($this->validateTextMatch($subParam,$filter['text-match'])) {
-                        // We had a match, so this param-filter succeeds
-                        continue 2;
-                    }
-
-                }
-
-            }
-
             // If we got here it means there was a text-match filter and there
             // were no matches. This means the filter needs to return false.
             return false;
@@ -270,7 +253,7 @@ class CalendarQueryValidator {
     protected function validateTextMatch($check, array $textMatch) {
 
         if ($check instanceof VObject\Node) {
-            $check = (string)$check;
+            $check = $check->getValue();
         }
 
         $isMatching = \Sabre\DAV\StringUtil::textMatch($check, $textMatch['value'], $textMatch['collation']);
@@ -318,7 +301,7 @@ class CalendarQueryValidator {
                 if ($component->parent->name === 'VEVENT' && $component->parent->RRULE) {
 
                     // Fire up the iterator!
-                    $it = new VObject\RecurrenceIterator($component->parent->parent, (string)$component->parent->UID);
+                    $it = new VObject\Recur\EventIterator($component->parent->parent, (string)$component->parent->UID);
                     while ($it->valid()) {
                         $expandedEvent = $it->getEventObject();
 

vendor/sabre/dav/lib/CalDAV/CalendarRoot.php

@@ -10,11 +10,14 @@ use Sabre\DAVACL\PrincipalBackend;
  * This object is responsible for generating a list of calendar-homes for each
  * user.
  *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
+ * This is the top-most node for the calendars tree. In most servers this class
+ * represents the "/calendars" path.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class CalendarRootNode extends \Sabre\DAVACL\AbstractPrincipalCollection {
+class CalendarRoot extends \Sabre\DAVACL\AbstractPrincipalCollection {
 
     /**
      * CalDAV backend
@@ -37,7 +40,7 @@ class CalendarRootNode extends \Sabre\DAVACL\AbstractPrincipalCollection {
      * @param Backend\BackendInterface $caldavBackend
      * @param string $principalPrefix
      */
-    public function __construct(PrincipalBackend\BackendInterface $principalBackend,Backend\BackendInterface $caldavBackend, $principalPrefix = 'principals') {
+    function __construct(PrincipalBackend\BackendInterface $principalBackend, Backend\BackendInterface $caldavBackend, $principalPrefix = 'principals') {
 
         parent::__construct($principalBackend, $principalPrefix);
         $this->caldavBackend = $caldavBackend;
@@ -52,7 +55,7 @@ class CalendarRootNode extends \Sabre\DAVACL\AbstractPrincipalCollection {
      *
      * @return string
      */
-    public function getName() {
+    function getName() {
 
         return Plugin::CALENDAR_ROOT;
 
@@ -68,9 +71,9 @@ class CalendarRootNode extends \Sabre\DAVACL\AbstractPrincipalCollection {
      * @param array $principal
      * @return \Sabre\DAV\INode
      */
-    public function getChildForPrincipal(array $principal) {
+    function getChildForPrincipal(array $principal) {
 
-        return new UserCalendars($this->caldavBackend, $principal);
+        return new CalendarHome($this->caldavBackend, $principal);
 
     }
 

vendor/sabre/dav/lib/CalDAV/Exception/InvalidComponentType.php

@@ -8,7 +8,7 @@ use Sabre\CalDAV;
 /**
  * InvalidComponentType
  *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
@@ -23,7 +23,7 @@ class InvalidComponentType extends DAV\Exception\Forbidden {
      * @param \DOMElement $errorNode
      * @return void
      */
-    public function serialize(DAV\Server $server, \DOMElement $errorNode) {
+    function serialize(DAV\Server $server, \DOMElement $errorNode) {
 
         $doc = $errorNode->ownerDocument;
 

vendor/sabre/dav/lib/CalDAV/ICSExportPlugin.php

@@ -0,0 +1,366 @@
+<?php
+
+namespace Sabre\CalDAV;
+
+use DateTimeZone;
+use Sabre\DAV;
+use Sabre\VObject;
+use Sabre\HTTP\RequestInterface;
+use Sabre\HTTP\ResponseInterface;
+use Sabre\DAV\Exception\BadRequest;
+use DateTime;
+
+/**
+ * ICS Exporter
+ *
+ * This plugin adds the ability to export entire calendars as .ics files.
+ * This is useful for clients that don't support CalDAV yet. They often do
+ * support ics files.
+ *
+ * To use this, point a http client to a caldav calendar, and add ?expand to
+ * the url.
+ *
+ * Further options that can be added to the url:
+ *   start=123456789 - Only return events after the given unix timestamp
+ *   end=123245679   - Only return events from before the given unix timestamp
+ *   expand=1        - Strip timezone information and expand recurring events.
+ *                     If you'd like to expand, you _must_ also specify start
+ *                     and end.
+ *
+ * By default this plugin returns data in the text/calendar format (iCalendar
+ * 2.0). If you'd like to receive jCal data instead, you can use an Accept
+ * header:
+ *
+ * Accept: application/calendar+json
+ *
+ * Alternatively, you can also specify this in the url using
+ * accept=application/calendar+json, or accept=jcal for short. If the url
+ * parameter and Accept header is specified, the url parameter wins.
+ *
+ * Note that specifying a start or end data implies that only events will be
+ * returned. VTODO and VJOURNAL will be stripped.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class ICSExportPlugin extends DAV\ServerPlugin {
+
+    /**
+     * Reference to Server class
+     *
+     * @var \Sabre\DAV\Server
+     */
+    protected $server;
+
+    /**
+     * Initializes the plugin and registers event handlers
+     *
+     * @param \Sabre\DAV\Server $server
+     * @return void
+     */
+    function initialize(DAV\Server $server) {
+
+        $this->server = $server;
+        $server->on('method:GET', [$this, 'httpGet'], 90);
+        $server->on('browserButtonActions', function($path, $node, &$actions) {
+            if ($node instanceof ICalendar) {
+                $actions .= '<a href="' . htmlspecialchars($path, ENT_QUOTES, 'UTF-8') . '?export"><span class="oi" data-glyph="calendar"></span></a>';
+            }
+        });
+
+    }
+
+    /**
+     * Intercepts GET requests on calendar urls ending with ?export.
+     *
+     * @param RequestInterface $request
+     * @param ResponseInterface $response
+     * @return bool
+     */
+    function httpGet(RequestInterface $request, ResponseInterface $response) {
+
+        $queryParams = $request->getQueryParameters();
+        if (!array_key_exists('export', $queryParams)) return;
+
+        $path = $request->getPath();
+
+        $node = $this->server->getProperties($path, [
+            '{DAV:}resourcetype',
+            '{DAV:}displayname',
+            '{http://sabredav.org/ns}sync-token',
+            '{DAV:}sync-token',
+            '{http://apple.com/ns/ical/}calendar-color',
+        ]);
+
+        if (!isset($node['{DAV:}resourcetype']) || !$node['{DAV:}resourcetype']->is('{' . Plugin::NS_CALDAV . '}calendar')) {
+            return;
+        }
+        // Marking the transactionType, for logging purposes.
+        $this->server->transactionType = 'get-calendar-export';
+
+        $properties = $node;
+
+        $start = null;
+        $end = null;
+        $expand = false;
+        $componentType = false;
+        if (isset($queryParams['start'])) {
+            if (!ctype_digit($queryParams['start'])) {
+                throw new BadRequest('The start= parameter must contain a unix timestamp');
+            }
+            $start = DateTime::createFromFormat('U', $queryParams['start']);
+        }
+        if (isset($queryParams['end'])) {
+            if (!ctype_digit($queryParams['end'])) {
+                throw new BadRequest('The end= parameter must contain a unix timestamp');
+            }
+            $end = DateTime::createFromFormat('U', $queryParams['end']);
+        }
+        if (isset($queryParams['expand']) && !!$queryParams['expand']) {
+            if (!$start || !$end) {
+                throw new BadRequest('If you\'d like to expand recurrences, you must specify both a start= and end= parameter.');
+            }
+            $expand = true;
+            $componentType = 'VEVENT';
+        }
+        if (isset($queryParams['componentType'])) {
+            if (!in_array($queryParams['componentType'], ['VEVENT', 'VTODO', 'VJOURNAL'])) {
+                throw new BadRequest('You are not allowed to search for components of type: ' . $queryParams['componentType'] . ' here');
+            }
+            $componentType = $queryParams['componentType'];
+        }
+
+        $format = \Sabre\HTTP\Util::Negotiate(
+            $request->getHeader('Accept'),
+            [
+                'text/calendar',
+                'application/calendar+json',
+            ]
+        );
+
+        if (isset($queryParams['accept'])) {
+            if ($queryParams['accept'] === 'application/calendar+json' || $queryParams['accept'] === 'jcal') {
+                $format = 'application/calendar+json';
+            }
+        }
+        if (!$format) {
+            $format = 'text/calendar';
+        }
+
+        $this->generateResponse($path, $start, $end, $expand, $componentType, $format, $properties, $response);
+
+        // Returning false to break the event chain
+        return false;
+
+    }
+
+    /**
+     * This method is responsible for generating the actual, full response.
+     *
+     * @param string $path
+     * @param DateTime|null $start
+     * @param DateTime|null $end
+     * @param bool $expand
+     * @param string $componentType
+     * @param string $format
+     * @param array $properties
+     * @param ResponseInterface $response
+     */
+    protected function generateResponse($path, $start, $end, $expand, $componentType, $format, $properties, ResponseInterface $response) {
+
+        $calDataProp = '{' . Plugin::NS_CALDAV . '}calendar-data';
+
+        $blobs = [];
+        if ($start || $end || $componentType) {
+
+            // If there was a start or end filter, we need to enlist
+            // calendarQuery for speed.
+            $calendarNode = $this->server->tree->getNodeForPath($path);
+            $queryResult = $calendarNode->calendarQuery([
+                'name'         => 'VCALENDAR',
+                'comp-filters' => [
+                    [
+                        'name'           => $componentType,
+                        'comp-filters'   => [],
+                        'prop-filters'   => [],
+                        'is-not-defined' => false,
+                        'time-range'     => [
+                            'start' => $start,
+                            'end'   => $end,
+                        ],
+                    ],
+                ],
+                'prop-filters'   => [],
+                'is-not-defined' => false,
+                'time-range'     => null,
+            ]);
+
+            // queryResult is just a list of base urls. We need to prefix the
+            // calendar path.
+            $queryResult = array_map(
+                function($item) use ($path) {
+                    return $path . '/' . $item;
+                },
+                $queryResult
+            );
+            $nodes = $this->server->getPropertiesForMultiplePaths($queryResult, [$calDataProp]);
+            unset($queryResult);
+
+        } else {
+            $nodes = $this->server->getPropertiesForPath($path, [$calDataProp], 1);
+        }
+
+        // Flattening the arrays
+        foreach ($nodes as $node) {
+            if (isset($node[200][$calDataProp])) {
+                $blobs[$node['href']] = $node[200][$calDataProp];
+            }
+        }
+        unset($nodes);
+
+        $mergedCalendar = $this->mergeObjects(
+            $properties,
+            $blobs
+        );
+
+        if ($expand) {
+            $calendarTimeZone = null;
+            // We're expanding, and for that we need to figure out the
+            // calendar's timezone.
+            $tzProp = '{' . Plugin::NS_CALDAV . '}calendar-timezone';
+            $tzResult = $this->server->getProperties($path, [$tzProp]);
+            if (isset($tzResult[$tzProp])) {
+                // This property contains a VCALENDAR with a single
+                // VTIMEZONE.
+                $vtimezoneObj = VObject\Reader::read($tzResult[$tzProp]);
+                $calendarTimeZone = $vtimezoneObj->VTIMEZONE->getTimeZone();
+                // Destroy circular references to PHP will GC the object.
+                $vtimezoneObj->destroy();
+                unset($vtimezoneObj);
+            } else {
+                // Defaulting to UTC.
+                $calendarTimeZone = new DateTimeZone('UTC');
+            }
+
+            $mergedCalendar = $mergedCalendar->expand($start, $end, $calendarTimeZone);
+        }
+
+        $response->setHeader('Content-Type', $format);
+
+        switch ($format) {
+            case 'text/calendar' :
+                $mergedCalendar = $mergedCalendar->serialize();
+                break;
+            case 'application/calendar+json' :
+                $mergedCalendar = json_encode($mergedCalendar->jsonSerialize());
+                break;
+        }
+
+        $response->setStatus(200);
+        $response->setBody($mergedCalendar);
+
+    }
+
+    /**
+     * Merges all calendar objects, and builds one big iCalendar blob.
+     *
+     * @param array $properties Some CalDAV properties
+     * @param array $inputObjects
+     * @return VObject\Component\VCalendar
+     */
+    function mergeObjects(array $properties, array $inputObjects) {
+
+        $calendar = new VObject\Component\VCalendar();
+        $calendar->version = '2.0';
+        if (DAV\Server::$exposeVersion) {
+            $calendar->prodid = '-//SabreDAV//SabreDAV ' . DAV\Version::VERSION . '//EN';
+        } else {
+            $calendar->prodid = '-//SabreDAV//SabreDAV//EN';
+        }
+        if (isset($properties['{DAV:}displayname'])) {
+            $calendar->{'X-WR-CALNAME'} = $properties['{DAV:}displayname'];
+        }
+        if (isset($properties['{http://apple.com/ns/ical/}calendar-color'])) {
+            $calendar->{'X-APPLE-CALENDAR-COLOR'} = $properties['{http://apple.com/ns/ical/}calendar-color'];
+        }
+
+        $collectedTimezones = [];
+
+        $timezones = [];
+        $objects = [];
+
+        foreach ($inputObjects as $href => $inputObject) {
+
+            $nodeComp = VObject\Reader::read($inputObject);
+
+            foreach ($nodeComp->children() as $child) {
+
+                switch ($child->name) {
+                    case 'VEVENT' :
+                    case 'VTODO' :
+                    case 'VJOURNAL' :
+                        $objects[] = clone $child;
+                        break;
+
+                    // VTIMEZONE is special, because we need to filter out the duplicates
+                    case 'VTIMEZONE' :
+                        // Naively just checking tzid.
+                        if (in_array((string)$child->TZID, $collectedTimezones)) continue;
+
+                        $timezones[] = clone $child;
+                        $collectedTimezones[] = $child->TZID;
+                        break;
+
+                }
+
+            }
+            // Destroy circular references to PHP will GC the object.
+            $nodeComp->destroy();
+            unset($nodeComp);
+
+        }
+
+        foreach ($timezones as $tz) $calendar->add($tz);
+        foreach ($objects as $obj) $calendar->add($obj);
+
+        return $calendar;
+
+    }
+
+    /**
+     * Returns a plugin name.
+     *
+     * Using this name other plugins will be able to access other plugins
+     * using \Sabre\DAV\Server::getPlugin
+     *
+     * @return string
+     */
+    function getPluginName() {
+
+        return 'ics-export';
+
+    }
+
+    /**
+     * Returns a bunch of meta-data about the plugin.
+     *
+     * Providing this information is optional, and is mainly displayed by the
+     * Browser plugin.
+     *
+     * The description key in the returned array may contain html and will not
+     * be sanitized.
+     *
+     * @return array
+     */
+    function getPluginInfo() {
+
+        return [
+            'name'        => $this->getPluginName(),
+            'description' => 'Adds the ability to export CalDAV calendars as a single iCalendar file.',
+            'link'        => 'http://sabre.io/dav/ics-export-plugin/',
+        ];
+
+    }
+
+}

vendor/sabre/dav/lib/CalDAV/ICalendar.php

@@ -0,0 +1,18 @@
+<?php
+
+namespace Sabre\CalDAV;
+
+use Sabre\DAVACL;
+
+/**
+ * Calendar interface
+ *
+ * Implement this interface to allow a node to be recognized as an calendar.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+interface ICalendar extends ICalendarObjectContainer, DAVACL\IACL {
+
+}

vendor/sabre/dav/lib/CalDAV/ICalendarObject.php

@@ -1,6 +1,7 @@
 <?php
 
 namespace Sabre\CalDAV;
+
 use Sabre\DAV;
 
 /**
@@ -11,11 +12,10 @@ use Sabre\DAV;
  *
  * Calendar objects are resources such as Events, Todo's or Journals.
  *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
 interface ICalendarObject extends DAV\IFile {
 
 }
-

vendor/sabre/dav/lib/CalDAV/ICalendarObjectContainer.php

@@ -1,18 +1,21 @@
 <?php
 
 namespace Sabre\CalDAV;
-use Sabre\DAV;
 
 /**
- * Calendar interface
+ * This interface represents a node that may contain calendar objects.
  *
- * Implement this interface to allow a node to be recognized as an calendar.
+ * This is the shared parent for both the Inbox collection and calendars
+ * resources.
  *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
+ * In most cases you will likely want to look at ICalendar instead of this
+ * interface.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-interface ICalendar extends DAV\ICollection {
+interface ICalendarObjectContainer extends \Sabre\DAV\ICollection {
 
     /**
      * Performs a calendar-query on the contents of this calendar.
@@ -31,6 +34,6 @@ interface ICalendar extends DAV\ICollection {
      * @param array $filters
      * @return array
      */
-    public function calendarQuery(array $filters);
+    function calendarQuery(array $filters);
 
 }

vendor/sabre/dav/lib/CalDAV/IShareableCalendar.php

@@ -5,7 +5,7 @@ namespace Sabre\CalDAV;
 /**
  * This interface represents a Calendar that can be shared with other users.
  *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */

vendor/sabre/dav/lib/CalDAV/ISharedCalendar.php

@@ -5,7 +5,7 @@ namespace Sabre\CalDAV;
 /**
  * This interface represents a Calendar that is shared by a different user.
  *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */

vendor/sabre/dav/lib/CalDAV/Notifications/Collection.php

@@ -16,7 +16,7 @@ use Sabre\DAVACL;
  * This collection should only return Sabre\CalDAV\Notifications\INode nodes as
  * its children.
  *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
@@ -42,7 +42,7 @@ class Collection extends DAV\Collection implements ICollection, DAVACL\IACL {
      * @param CalDAV\Backend\NotificationSupport $caldavBackend
      * @param string $principalUri
      */
-    public function __construct(CalDAV\Backend\NotificationSupport $caldavBackend, $principalUri) {
+    function __construct(CalDAV\Backend\NotificationSupport $caldavBackend, $principalUri) {
 
         $this->caldavBackend = $caldavBackend;
         $this->principalUri = $principalUri;
@@ -54,9 +54,9 @@ class Collection extends DAV\Collection implements ICollection, DAVACL\IACL {
      *
      * @return array
      */
-    public function getChildren() {
+    function getChildren() {
 
-        $children = array();
+        $children = [];
         $notifications = $this->caldavBackend->getNotificationsForPrincipal($this->principalUri);
 
         foreach ($notifications as $notification) {
@@ -77,7 +77,7 @@ class Collection extends DAV\Collection implements ICollection, DAVACL\IACL {
      *
      * @return string
      */
-    public function getName() {
+    function getName() {
 
         return 'notifications';
 
@@ -90,7 +90,7 @@ class Collection extends DAV\Collection implements ICollection, DAVACL\IACL {
      *
      * @return string|null
      */
-    public function getOwner() {
+    function getOwner() {
 
         return $this->principalUri;
 
@@ -103,7 +103,7 @@ class Collection extends DAV\Collection implements ICollection, DAVACL\IACL {
      *
      * @return string|null
      */
-    public function getGroup() {
+    function getGroup() {
 
         return null;
 
@@ -121,20 +121,20 @@ class Collection extends DAV\Collection implements ICollection, DAVACL\IACL {
      *
      * @return array
      */
-    public function getACL() {
+    function getACL() {
 
-        return array(
-            array(
+        return [
+            [
                 'principal' => $this->getOwner(),
                 'privilege' => '{DAV:}read',
                 'protected' => true,
-            ),
-            array(
+            ],
+            [
                 'principal' => $this->getOwner(),
                 'privilege' => '{DAV:}write',
                 'protected' => true,
-            )
-        );
+            ]
+        ];
 
     }
 
@@ -146,7 +146,7 @@ class Collection extends DAV\Collection implements ICollection, DAVACL\IACL {
      * @param array $acl
      * @return void
      */
-    public function setACL(array $acl) {
+    function setACL(array $acl) {
 
         throw new DAV\Exception\NotImplemented('Updating ACLs is not implemented here');
 
@@ -164,7 +164,7 @@ class Collection extends DAV\Collection implements ICollection, DAVACL\IACL {
      *
      * @return array|null
      */
-    public function getSupportedPrivilegeSet() {
+    function getSupportedPrivilegeSet() {
 
         return null;
 

vendor/sabre/dav/lib/CalDAV/Notifications/ICollection.php

@@ -14,11 +14,10 @@ use Sabre\DAV;
  * This collection should only return Sabre\CalDAV\Notifications\INode nodes as
  * its children.
  *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
 interface ICollection extends DAV\ICollection {
 
-
 }

vendor/sabre/dav/lib/CalDAV/Notifications/INode.php

@@ -12,7 +12,7 @@ namespace Sabre\CalDAV\Notifications;
  * For a complete example, check out the Notification class, which contains
  * some helper functions.
  *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */

vendor/sabre/dav/lib/CalDAV/Notifications/Node.php

@@ -4,6 +4,7 @@ namespace Sabre\CalDAV\Notifications;
 
 use Sabre\DAV;
 use Sabre\CalDAV;
+use Sabre\CalDAV\Xml\Notification\NotificationInterface;
 use Sabre\DAVACL;
 
 /**
@@ -12,8 +13,8 @@ use Sabre\DAVACL;
  * The signature is mostly identical to that of Sabre\DAV\IFile, but the get() method
  * MUST return an xml document that matches the requirements of the
  * 'caldav-notifications.txt' spec.
-
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
@@ -45,9 +46,9 @@ class Node extends DAV\File implements INode, DAVACL\IACL {
      *
      * @param CalDAV\Backend\NotificationSupport $caldavBackend
      * @param string $principalUri
-     * @param CalDAV\Notifications\INotificationType $notification
+     * @param NotificationInterface $notification
      */
-    public function __construct(CalDAV\Backend\NotificationSupport $caldavBackend, $principalUri, INotificationType $notification) {
+    function __construct(CalDAV\Backend\NotificationSupport $caldavBackend, $principalUri, NotificationInterface $notification) {
 
         $this->caldavBackend = $caldavBackend;
         $this->principalUri = $principalUri;
@@ -60,7 +61,7 @@ class Node extends DAV\File implements INode, DAVACL\IACL {
      *
      * @return id
      */
-    public function getName() {
+    function getName() {
 
         return $this->notification->getId() . '.xml';
 
@@ -73,7 +74,7 @@ class Node extends DAV\File implements INode, DAVACL\IACL {
      *
      * @return string
      */
-    public function getETag() {
+    function getETag() {
 
         return $this->notification->getETag();
 
@@ -85,7 +86,7 @@ class Node extends DAV\File implements INode, DAVACL\IACL {
      *
      * @return INotificationType
      */
-    public function getNotificationType() {
+    function getNotificationType() {
 
         return $this->notification;
 
@@ -96,7 +97,7 @@ class Node extends DAV\File implements INode, DAVACL\IACL {
      *
      * @return void
      */
-    public function delete() {
+    function delete() {
 
         $this->caldavBackend->deleteNotification($this->getOwner(), $this->notification);
 
@@ -109,7 +110,7 @@ class Node extends DAV\File implements INode, DAVACL\IACL {
      *
      * @return string|null
      */
-    public function getOwner() {
+    function getOwner() {
 
         return $this->principalUri;
 
@@ -122,7 +123,7 @@ class Node extends DAV\File implements INode, DAVACL\IACL {
      *
      * @return string|null
      */
-    public function getGroup() {
+    function getGroup() {
 
         return null;
 
@@ -140,20 +141,20 @@ class Node extends DAV\File implements INode, DAVACL\IACL {
      *
      * @return array
      */
-    public function getACL() {
+    function getACL() {
 
-        return array(
-            array(
+        return [
+            [
                 'principal' => $this->getOwner(),
                 'privilege' => '{DAV:}read',
                 'protected' => true,
-            ),
-            array(
+            ],
+            [
                 'principal' => $this->getOwner(),
                 'privilege' => '{DAV:}write',
                 'protected' => true,
-            )
-        );
+            ]
+        ];
 
     }
 
@@ -165,7 +166,7 @@ class Node extends DAV\File implements INode, DAVACL\IACL {
      * @param array $acl
      * @return void
      */
-    public function setACL(array $acl) {
+    function setACL(array $acl) {
 
         throw new DAV\Exception\NotImplemented('Updating ACLs is not implemented here');
 
@@ -183,7 +184,7 @@ class Node extends DAV\File implements INode, DAVACL\IACL {
      *
      * @return array|null
      */
-    public function getSupportedPrivilegeSet() {
+    function getSupportedPrivilegeSet() {
 
         return null;
 

vendor/sabre/dav/lib/CalDAV/Notifications/Plugin.php

@@ -0,0 +1,180 @@
+<?php
+
+namespace Sabre\CalDAV\Notifications;
+
+use Sabre\DAV;
+use Sabre\DAV\PropFind;
+use Sabre\DAV\INode as BaseINode;
+use Sabre\DAV\ServerPlugin;
+use Sabre\DAV\Server;
+use Sabre\DAVACL;
+use Sabre\HTTP\RequestInterface;
+use Sabre\HTTP\ResponseInterface;
+
+/**
+ * Notifications plugin
+ *
+ * This plugin implements several features required by the caldav-notification
+ * draft specification.
+ *
+ * Before version 2.1.0 this functionality was part of Sabre\CalDAV\Plugin but
+ * this has since been split up.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class Plugin extends ServerPlugin {
+
+    /**
+     * This is the namespace for the proprietary calendarserver extensions
+     */
+    const NS_CALENDARSERVER = 'http://calendarserver.org/ns/';
+
+    /**
+     * Reference to the main server object.
+     *
+     * @var Server
+     */
+    protected $server;
+
+    /**
+     * Returns a plugin name.
+     *
+     * Using this name other plugins will be able to access other plugins
+     * using \Sabre\DAV\Server::getPlugin
+     *
+     * @return string
+     */
+    function getPluginName() {
+
+        return 'notifications';
+
+    }
+
+    /**
+     * This initializes the plugin.
+     *
+     * This function is called by Sabre\DAV\Server, after
+     * addPlugin is called.
+     *
+     * This method should set up the required event subscriptions.
+     *
+     * @param Server $server
+     * @return void
+     */
+    function initialize(Server $server) {
+
+        $this->server = $server;
+        $server->on('method:GET', [$this, 'httpGet'], 90);
+        $server->on('propFind',   [$this, 'propFind']);
+
+        $server->xml->namespaceMap[self::NS_CALENDARSERVER] = 'cs';
+        $server->resourceTypeMapping['\\Sabre\\CalDAV\\Notifications\\ICollection'] = '{' . self::NS_CALENDARSERVER . '}notification';
+
+        array_push($server->protectedProperties,
+            '{' . self::NS_CALENDARSERVER . '}notification-URL',
+            '{' . self::NS_CALENDARSERVER . '}notificationtype'
+        );
+
+    }
+
+    /**
+     * PropFind
+     *
+     * @param PropFind $propFind
+     * @param BaseINode $node
+     * @return void
+     */
+    function propFind(PropFind $propFind, BaseINode $node) {
+
+        $caldavPlugin = $this->server->getPlugin('caldav');
+
+        if ($node instanceof DAVACL\IPrincipal) {
+
+            $principalUrl = $node->getPrincipalUrl();
+
+            // notification-URL property
+            $propFind->handle('{' . self::NS_CALENDARSERVER . '}notification-URL', function() use ($principalUrl, $caldavPlugin) {
+
+                $notificationPath = $caldavPlugin->getCalendarHomeForPrincipal($principalUrl) . '/notifications/';
+                return new DAV\Xml\Property\Href($notificationPath);
+
+            });
+
+        }
+
+        if ($node instanceof INode) {
+
+            $propFind->handle(
+                '{' . self::NS_CALENDARSERVER . '}notificationtype',
+                [$node, 'getNotificationType']
+            );
+
+        }
+
+    }
+
+    /**
+     * This event is triggered before the usual GET request handler.
+     *
+     * We use this to intercept GET calls to notification nodes, and return the
+     * proper response.
+     *
+     * @param RequestInterface $request
+     * @param ResponseInterface $response
+     * @return void
+     */
+    function httpGet(RequestInterface $request, ResponseInterface $response) {
+
+        $path = $request->getPath();
+
+        try {
+            $node = $this->server->tree->getNodeForPath($path);
+        } catch (DAV\Exception\NotFound $e) {
+            return;
+        }
+
+        if (!$node instanceof INode)
+            return;
+
+        $writer = $this->server->xml->getWriter();
+        $writer->contextUri = $this->server->getBaseUri();
+        $writer->openMemory();
+        $writer->startDocument('1.0', 'UTF-8');
+        $writer->startElement('{http://calendarserver.org/ns/}notification');
+        $node->getNotificationType()->xmlSerializeFull($writer);
+        $writer->endElement();
+
+        $response->setHeader('Content-Type', 'application/xml');
+        $response->setHeader('ETag', $node->getETag());
+        $response->setStatus(200);
+        $response->setBody($writer->outputMemory());
+
+        // Return false to break the event chain.
+        return false;
+
+    }
+
+    /**
+     * Returns a bunch of meta-data about the plugin.
+     *
+     * Providing this information is optional, and is mainly displayed by the
+     * Browser plugin.
+     *
+     * The description key in the returned array may contain html and will not
+     * be sanitized.
+     *
+     * @return array
+     */
+    function getPluginInfo() {
+
+        return [
+            'name'        => $this->getPluginName(),
+            'description' => 'Adds support for caldav-notifications, which is required to enable caldav-sharing.',
+            'link'        => 'http://sabre.io/dav/caldav-sharing/',
+        ];
+
+    }
+
+}

vendor/sabre/dav/lib/CalDAV/Principal/Collection.php

@@ -1,6 +1,7 @@
 <?php
 
 namespace Sabre\CalDAV\Principal;
+
 use Sabre\DAVACL;
 
 /**
@@ -11,11 +12,11 @@ use Sabre\DAVACL;
  * calendar-proxy-write sub-principals, as defined by the caldav-proxy
  * specification.
  *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Collection extends DAVACL\AbstractPrincipalCollection {
+class Collection extends DAVACL\PrincipalCollection {
 
     /**
      * Returns a child object based on principal information
@@ -23,7 +24,7 @@ class Collection extends DAVACL\AbstractPrincipalCollection {
      * @param array $principalInfo
      * @return User
      */
-    public function getChildForPrincipal(array $principalInfo) {
+    function getChildForPrincipal(array $principalInfo) {
 
         return new User($this->principalBackend, $principalInfo);
 

vendor/sabre/dav/lib/CalDAV/Principal/IProxyRead.php

@@ -10,7 +10,7 @@ use Sabre\DAVACL;
  * Any principal node implementing this interface will be picked up as a 'proxy
  * principal group'.
  *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */

vendor/sabre/dav/lib/CalDAV/Principal/IProxyWrite.php

@@ -10,7 +10,7 @@ use Sabre\DAVACL;
  * Any principal node implementing this interface will be picked up as a 'proxy
  * principal group'.
  *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */

vendor/sabre/dav/lib/CalDAV/Principal/ProxyRead.php

@@ -1,6 +1,7 @@
 <?php
 
 namespace Sabre\CalDAV\Principal;
+
 use Sabre\DAVACL;
 use Sabre\DAV;
 
@@ -11,7 +12,7 @@ use Sabre\DAV;
  * This is needed to implement 'Calendar delegation' support. This class is
  * instantiated by User.
  *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
@@ -39,7 +40,7 @@ class ProxyRead implements IProxyRead {
      * @param DAVACL\PrincipalBackend\BackendInterface $principalBackend
      * @param array $principalInfo
      */
-    public function __construct(DAVACL\PrincipalBackend\BackendInterface $principalBackend, array $principalInfo) {
+    function __construct(DAVACL\PrincipalBackend\BackendInterface $principalBackend, array $principalInfo) {
 
         $this->principalInfo = $principalInfo;
         $this->principalBackend = $principalBackend;
@@ -51,7 +52,7 @@ class ProxyRead implements IProxyRead {
      *
      * @return string
      */
-    public function getName() {
+    function getName() {
 
         return 'calendar-proxy-read';
 
@@ -62,7 +63,7 @@ class ProxyRead implements IProxyRead {
      *
      * @return null
      */
-    public function getLastModified() {
+    function getLastModified() {
 
         return null;
 
@@ -74,7 +75,7 @@ class ProxyRead implements IProxyRead {
      * @throws DAV\Exception\Forbidden
      * @return void
      */
-    public function delete() {
+    function delete() {
 
         throw new DAV\Exception\Forbidden('Permission denied to delete node');
 
@@ -87,7 +88,7 @@ class ProxyRead implements IProxyRead {
      * @param string $name The new name
      * @return void
      */
-    public function setName($name) {
+    function setName($name) {
 
         throw new DAV\Exception\Forbidden('Permission denied to rename file');
 
@@ -101,9 +102,9 @@ class ProxyRead implements IProxyRead {
      *
      * @return array
      */
-    public function getAlternateUriSet() {
+    function getAlternateUriSet() {
 
-        return array();
+        return [];
 
     }
 
@@ -112,7 +113,7 @@ class ProxyRead implements IProxyRead {
      *
      * @return string
      */
-    public function getPrincipalUrl() {
+    function getPrincipalUrl() {
 
         return $this->principalInfo['uri'] . '/' . $this->getName();
 
@@ -126,7 +127,7 @@ class ProxyRead implements IProxyRead {
      *
      * @return array
      */
-    public function getGroupMemberSet() {
+    function getGroupMemberSet() {
 
         return $this->principalBackend->getGroupMemberSet($this->getPrincipalUrl());
 
@@ -140,7 +141,7 @@ class ProxyRead implements IProxyRead {
      *
      * @return array
      */
-    public function getGroupMembership() {
+    function getGroupMembership() {
 
         return $this->principalBackend->getGroupMembership($this->getPrincipalUrl());
 
@@ -157,7 +158,7 @@ class ProxyRead implements IProxyRead {
      * @param array $principals
      * @return void
      */
-    public function setGroupMemberSet(array $principals) {
+    function setGroupMemberSet(array $principals) {
 
         $this->principalBackend->setGroupMemberSet($this->getPrincipalUrl(), $principals);
 
@@ -171,7 +172,7 @@ class ProxyRead implements IProxyRead {
      *
      * @return string
      */
-    public function getDisplayName() {
+    function getDisplayName() {
 
         return $this->getName();
 

vendor/sabre/dav/lib/CalDAV/Principal/ProxyWrite.php

@@ -1,6 +1,7 @@
 <?php
 
 namespace Sabre\CalDAV\Principal;
+
 use Sabre\DAVACL;
 use Sabre\DAV;
 
@@ -11,7 +12,7 @@ use Sabre\DAV;
  * This is needed to implement 'Calendar delegation' support. This class is
  * instantiated by User.
  *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
@@ -39,7 +40,7 @@ class ProxyWrite implements IProxyWrite {
      * @param DAVACL\PrincipalBackend\BackendInterface $principalBackend
      * @param array $principalInfo
      */
-    public function __construct(DAVACL\PrincipalBackend\BackendInterface $principalBackend, array $principalInfo) {
+    function __construct(DAVACL\PrincipalBackend\BackendInterface $principalBackend, array $principalInfo) {
 
         $this->principalInfo = $principalInfo;
         $this->principalBackend = $principalBackend;
@@ -51,7 +52,7 @@ class ProxyWrite implements IProxyWrite {
      *
      * @return string
      */
-    public function getName() {
+    function getName() {
 
         return 'calendar-proxy-write';
 
@@ -62,7 +63,7 @@ class ProxyWrite implements IProxyWrite {
      *
      * @return null
      */
-    public function getLastModified() {
+    function getLastModified() {
 
         return null;
 
@@ -74,7 +75,7 @@ class ProxyWrite implements IProxyWrite {
      * @throws DAV\Exception\Forbidden
      * @return void
      */
-    public function delete() {
+    function delete() {
 
         throw new DAV\Exception\Forbidden('Permission denied to delete node');
 
@@ -87,7 +88,7 @@ class ProxyWrite implements IProxyWrite {
      * @param string $name The new name
      * @return void
      */
-    public function setName($name) {
+    function setName($name) {
 
         throw new DAV\Exception\Forbidden('Permission denied to rename file');
 
@@ -101,9 +102,9 @@ class ProxyWrite implements IProxyWrite {
      *
      * @return array
      */
-    public function getAlternateUriSet() {
+    function getAlternateUriSet() {
 
-        return array();
+        return [];
 
     }
 
@@ -112,7 +113,7 @@ class ProxyWrite implements IProxyWrite {
      *
      * @return string
      */
-    public function getPrincipalUrl() {
+    function getPrincipalUrl() {
 
         return $this->principalInfo['uri'] . '/' . $this->getName();
 
@@ -126,7 +127,7 @@ class ProxyWrite implements IProxyWrite {
      *
      * @return array
      */
-    public function getGroupMemberSet() {
+    function getGroupMemberSet() {
 
         return $this->principalBackend->getGroupMemberSet($this->getPrincipalUrl());
 
@@ -140,7 +141,7 @@ class ProxyWrite implements IProxyWrite {
      *
      * @return array
      */
-    public function getGroupMembership() {
+    function getGroupMembership() {
 
         return $this->principalBackend->getGroupMembership($this->getPrincipalUrl());
 
@@ -157,7 +158,7 @@ class ProxyWrite implements IProxyWrite {
      * @param array $principals
      * @return void
      */
-    public function setGroupMemberSet(array $principals) {
+    function setGroupMemberSet(array $principals) {
 
         $this->principalBackend->setGroupMemberSet($this->getPrincipalUrl(), $principals);
 
@@ -171,7 +172,7 @@ class ProxyWrite implements IProxyWrite {
      *
      * @return string
      */
-    public function getDisplayName() {
+    function getDisplayName() {
 
         return $this->getName();
 

vendor/sabre/dav/lib/CalDAV/Principal/User.php

@@ -1,6 +1,7 @@
 <?php
 
 namespace Sabre\CalDAV\Principal;
+
 use Sabre\DAV;
 use Sabre\DAVACL;
 
@@ -11,7 +12,7 @@ use Sabre\DAVACL;
  * collection and returns the caldav-proxy-read and caldav-proxy-write child
  * principals.
  *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
@@ -25,7 +26,7 @@ class User extends DAVACL\Principal implements DAV\ICollection {
      * @throws DAV\Exception\Forbidden
      * @return void
      */
-    public function createFile($name, $data = null) {
+    function createFile($name, $data = null) {
 
         throw new DAV\Exception\Forbidden('Permission denied to create file (filename ' . $name . ')');
 
@@ -38,7 +39,7 @@ class User extends DAVACL\Principal implements DAV\ICollection {
      * @throws DAV\Exception\Forbidden
      * @return void
      */
-    public function createDirectory($name) {
+    function createDirectory($name) {
 
         throw new DAV\Exception\Forbidden('Permission denied to create directory');
 
@@ -50,7 +51,7 @@ class User extends DAVACL\Principal implements DAV\ICollection {
      * @param string $name
      * @return DAV\INode
      */
-    public function getChild($name) {
+    function getChild($name) {
 
         $principal = $this->principalBackend->getPrincipalByPath($this->getPrincipalURL() . '/' . $name);
         if (!$principal) {
@@ -71,9 +72,9 @@ class User extends DAVACL\Principal implements DAV\ICollection {
      *
      * @return DAV\INode[]
      */
-    public function getChildren() {
+    function getChildren() {
 
-        $r = array();
+        $r = [];
         if ($this->principalBackend->getPrincipalByPath($this->getPrincipalURL() . '/calendar-proxy-read')) {
             $r[] = new ProxyRead($this->principalBackend, $this->principalProperties);
         }
@@ -91,7 +92,7 @@ class User extends DAVACL\Principal implements DAV\ICollection {
      * @param string $name
      * @return bool
      */
-    public function childExists($name) {
+    function childExists($name) {
 
         try {
             $this->getChild($name);
@@ -114,19 +115,19 @@ class User extends DAVACL\Principal implements DAV\ICollection {
      *
      * @return array
      */
-    public function getACL() {
+    function getACL() {
 
         $acl = parent::getACL();
-        $acl[] = array(
+        $acl[] = [
             'privilege' => '{DAV:}read',
             'principal' => $this->principalProperties['uri'] . '/calendar-proxy-read',
             'protected' => true,
-        );
-        $acl[] = array(
+        ];
+        $acl[] = [
             'privilege' => '{DAV:}read',
             'principal' => $this->principalProperties['uri'] . '/calendar-proxy-write',
             'protected' => true,
-        );
+        ];
         return $acl;
 
     }

vendor/sabre/dav/lib/CalDAV/Schedule/IInbox.php

@@ -0,0 +1,15 @@
+<?php
+
+namespace Sabre\CalDAV\Schedule;
+
+/**
+ * Implement this interface to have a node be recognized as a CalDAV scheduling
+ * inbox.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+interface IInbox extends \Sabre\CalDAV\ICalendarObjectContainer, \Sabre\DAVACL\IACL {
+
+}

vendor/sabre/dav/lib/CalDAV/Schedule/IMipPlugin.php

@@ -0,0 +1,190 @@
+<?php
+
+namespace Sabre\CalDAV\Schedule;
+
+use Sabre\DAV;
+use Sabre\VObject\ITip;
+
+/**
+ * iMIP handler.
+ *
+ * This class is responsible for sending out iMIP messages. iMIP is the
+ * email-based transport for iTIP. iTIP deals with scheduling operations for
+ * iCalendar objects.
+ *
+ * If you want to customize the email that gets sent out, you can do so by
+ * extending this class and overriding the sendMessage method.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class IMipPlugin extends DAV\ServerPlugin {
+
+    /**
+     * Email address used in From: header.
+     *
+     * @var string
+     */
+    protected $senderEmail;
+
+    /**
+     * ITipMessage
+     *
+     * @var ITip\Message
+     */
+    protected $itipMessage;
+
+    /**
+     * Creates the email handler.
+     *
+     * @param string $senderEmail. The 'senderEmail' is the email that shows up
+     *                             in the 'From:' address. This should
+     *                             generally be some kind of no-reply email
+     *                             address you own.
+     */
+    function __construct($senderEmail) {
+
+        $this->senderEmail = $senderEmail;
+
+    }
+
+    /*
+     * This initializes the plugin.
+     *
+     * This function is called by Sabre\DAV\Server, after
+     * addPlugin is called.
+     *
+     * This method should set up the required event subscriptions.
+     *
+     * @param DAV\Server $server
+     * @return void
+     */
+    function initialize(DAV\Server $server) {
+
+        $server->on('schedule', [$this, 'schedule'], 120);
+
+    }
+
+    /**
+     * Returns a plugin name.
+     *
+     * Using this name other plugins will be able to access other plugins
+     * using \Sabre\DAV\Server::getPlugin
+     *
+     * @return string
+     */
+    function getPluginName() {
+
+        return 'imip';
+
+    }
+
+    /**
+     * Event handler for the 'schedule' event.
+     *
+     * @param ITip\Message $iTipMessage
+     * @return void
+     */
+    function schedule(ITip\Message $iTipMessage) {
+
+        // Not sending any emails if the system considers the update
+        // insignificant.
+        if (!$iTipMessage->significantChange) {
+            if (!$iTipMessage->scheduleStatus) {
+                $iTipMessage->scheduleStatus = '1.0;We got the message, but it\'s not significant enough to warrant an email';
+            }
+            return;
+        }
+
+        $summary = $iTipMessage->message->VEVENT->SUMMARY;
+
+        if (parse_url($iTipMessage->sender, PHP_URL_SCHEME) !== 'mailto')
+            return;
+
+        if (parse_url($iTipMessage->recipient, PHP_URL_SCHEME) !== 'mailto')
+            return;
+
+        $sender = substr($iTipMessage->sender, 7);
+        $recipient = substr($iTipMessage->recipient, 7);
+
+        if ($iTipMessage->senderName) {
+            $sender = $iTipMessage->senderName . ' <' . $sender . '>';
+        }
+        if ($iTipMessage->recipientName) {
+            $recipient = $iTipMessage->recipientName . ' <' . $recipient . '>';
+        }
+
+        $subject = 'SabreDAV iTIP message';
+        switch (strtoupper($iTipMessage->method)) {
+            case 'REPLY' :
+                $subject = 'Re: ' . $summary;
+                break;
+            case 'REQUEST' :
+                $subject = $summary;
+                break;
+            case 'CANCEL' :
+                $subject = 'Cancelled: ' . $summary;
+                break;
+        }
+
+        $headers = [
+            'Reply-To: ' . $sender,
+            'From: ' . $this->senderEmail,
+            'Content-Type: text/calendar; charset=UTF-8; method=' . $iTipMessage->method,
+        ];
+        if (DAV\Server::$exposeVersion) {
+            $headers[] = 'X-Sabre-Version: ' . DAV\Version::VERSION;
+        }
+        $this->mail(
+            $recipient,
+            $subject,
+            $iTipMessage->message->serialize(),
+            $headers
+        );
+        $iTipMessage->scheduleStatus = '1.1; Scheduling message is sent via iMip';
+
+    }
+
+    // @codeCoverageIgnoreStart
+    // This is deemed untestable in a reasonable manner
+
+    /**
+     * This function is responsible for sending the actual email.
+     *
+     * @param string $to Recipient email address
+     * @param string $subject Subject of the email
+     * @param string $body iCalendar body
+     * @param array $headers List of headers
+     * @return void
+     */
+    protected function mail($to, $subject, $body, array $headers) {
+
+        mail($to, $subject, $body, implode("\r\n", $headers));
+
+    }
+
+    // @codeCoverageIgnoreEnd
+
+    /**
+     * Returns a bunch of meta-data about the plugin.
+     *
+     * Providing this information is optional, and is mainly displayed by the
+     * Browser plugin.
+     *
+     * The description key in the returned array may contain html and will not
+     * be sanitized.
+     *
+     * @return array
+     */
+    function getPluginInfo() {
+
+        return [
+            'name'        => $this->getPluginName(),
+            'description' => 'Email delivery (rfc6037) for CalDAV scheduling',
+            'link'        => 'http://sabre.io/dav/scheduling/',
+        ];
+
+    }
+
+}

vendor/sabre/dav/lib/CalDAV/Schedule/IOutbox.php

@@ -6,11 +6,10 @@ namespace Sabre\CalDAV\Schedule;
  * Implement this interface to have a node be recognized as a CalDAV scheduling
  * outbox.
  *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
 interface IOutbox extends \Sabre\DAV\ICollection, \Sabre\DAVACL\IACL {
 
-
 }

vendor/sabre/dav/lib/CalDAV/Schedule/ISchedulingObject.php

@@ -0,0 +1,13 @@
+<?php
+
+namespace Sabre\CalDAV\Schedule;
+
+/**
+ * The SchedulingObject represents a scheduling object in the Inbox collection
+ *
+ * @license http://sabre.io/license/ Modified BSD License
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ */
+interface ISchedulingObject extends \Sabre\CalDAV\ICalendarObject {
+
+}

vendor/sabre/dav/lib/CalDAV/Schedule/Inbox.php

@@ -0,0 +1,261 @@
+<?php
+
+namespace Sabre\CalDAV\Schedule;
+
+use Sabre\DAV;
+use Sabre\CalDAV;
+use Sabre\DAVACL;
+use Sabre\CalDAV\Backend;
+use Sabre\VObject;
+
+/**
+ * The CalDAV scheduling inbox
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class Inbox extends DAV\Collection implements IInbox {
+
+    /**
+     * CalDAV backend
+     *
+     * @var Backend\BackendInterface
+     */
+    protected $caldavBackend;
+
+    /**
+     * The principal Uri
+     *
+     * @var string
+     */
+    protected $principalUri;
+
+    /**
+     * Constructor
+     *
+     * @param Backend\SchedulingSupport $caldavBackend
+     * @param string $principalUri
+     */
+    function __construct(Backend\SchedulingSupport $caldavBackend, $principalUri) {
+
+        $this->caldavBackend = $caldavBackend;
+        $this->principalUri = $principalUri;
+
+    }
+
+    /**
+     * Returns the name of the node.
+     *
+     * This is used to generate the url.
+     *
+     * @return string
+     */
+    function getName() {
+
+        return 'inbox';
+
+    }
+
+    /**
+     * Returns an array with all the child nodes
+     *
+     * @return \Sabre\DAV\INode[]
+     */
+    function getChildren() {
+
+        $objs = $this->caldavBackend->getSchedulingObjects($this->principalUri);
+        $children = [];
+        foreach ($objs as $obj) {
+            //$obj['acl'] = $this->getACL();
+            $obj['principaluri'] = $this->principalUri;
+            $children[] = new SchedulingObject($this->caldavBackend, $obj);
+        }
+        return $children;
+
+    }
+
+    /**
+     * Creates a new file in the directory
+     *
+     * Data will either be supplied as a stream resource, or in certain cases
+     * as a string. Keep in mind that you may have to support either.
+     *
+     * After succesful creation of the file, you may choose to return the ETag
+     * of the new file here.
+     *
+     * The returned ETag must be surrounded by double-quotes (The quotes should
+     * be part of the actual string).
+     *
+     * If you cannot accurately determine the ETag, you should not return it.
+     * If you don't store the file exactly as-is (you're transforming it
+     * somehow) you should also not return an ETag.
+     *
+     * This means that if a subsequent GET to this new file does not exactly
+     * return the same contents of what was submitted here, you are strongly
+     * recommended to omit the ETag.
+     *
+     * @param string $name Name of the file
+     * @param resource|string $data Initial payload
+     * @return null|string
+     */
+    function createFile($name, $data = null) {
+
+        $this->caldavBackend->createSchedulingObject($this->principalUri, $name, $data);
+
+    }
+
+    /**
+     * Returns the owner principal
+     *
+     * This must be a url to a principal, or null if there's no owner
+     *
+     * @return string|null
+     */
+    function getOwner() {
+
+        return $this->principalUri;
+
+    }
+
+    /**
+     * Returns a group principal
+     *
+     * This must be a url to a principal, or null if there's no owner
+     *
+     * @return string|null
+     */
+    function getGroup() {
+
+        return null;
+
+    }
+
+    /**
+     * Returns a list of ACE's for this node.
+     *
+     * Each ACE has the following properties:
+     *   * 'privilege', a string such as {DAV:}read or {DAV:}write. These are
+     *     currently the only supported privileges
+     *   * 'principal', a url to the principal who owns the node
+     *   * 'protected' (optional), indicating that this ACE is not allowed to
+     *      be updated.
+     *
+     * @return array
+     */
+    function getACL() {
+
+        return [
+            [
+                'privilege' => '{DAV:}read',
+                'principal' => '{DAV:}authenticated',
+                'protected' => true,
+            ],
+            [
+                'privilege' => '{DAV:}write-properties',
+                'principal' => $this->getOwner(),
+                'protected' => true,
+            ],
+            [
+                'privilege' => '{DAV:}unbind',
+                'principal' => $this->getOwner(),
+                'protected' => true,
+            ],
+            [
+                'privilege' => '{DAV:}unbind',
+                'principal' => $this->getOwner() . '/calendar-proxy-write',
+                'protected' => true,
+            ],
+            [
+                'privilege' => '{' . CalDAV\Plugin::NS_CALDAV . '}schedule-deliver-invite',
+                'principal' => '{DAV:}authenticated',
+                'protected' => true,
+            ],
+            [
+                'privilege' => '{' . CalDAV\Plugin::NS_CALDAV . '}schedule-deliver-reply',
+                'principal' => '{DAV:}authenticated',
+                'protected' => true,
+            ],
+        ];
+
+    }
+
+    /**
+     * Updates the ACL
+     *
+     * This method will receive a list of new ACE's.
+     *
+     * @param array $acl
+     * @return void
+     */
+    function setACL(array $acl) {
+
+        throw new DAV\Exception\MethodNotAllowed('You\'re not allowed to update the ACL');
+
+    }
+
+    /**
+     * Returns the list of supported privileges for this node.
+     *
+     * The returned data structure is a list of nested privileges.
+     * See Sabre\DAVACL\Plugin::getDefaultSupportedPrivilegeSet for a simple
+     * standard structure.
+     *
+     * If null is returned from this method, the default privilege set is used,
+     * which is fine for most common usecases.
+     *
+     * @return array|null
+     */
+    function getSupportedPrivilegeSet() {
+
+        $ns = '{' . CalDAV\Plugin::NS_CALDAV . '}';
+
+        $default = DAVACL\Plugin::getDefaultSupportedPrivilegeSet();
+        $default['aggregates'][] = [
+            'privilege'  => $ns . 'schedule-deliver',
+            'aggregates' => [
+               ['privilege' => $ns . 'schedule-deliver-invite'],
+               ['privilege' => $ns . 'schedule-deliver-reply'],
+            ],
+        ];
+        return $default;
+
+    }
+
+    /**
+     * Performs a calendar-query on the contents of this calendar.
+     *
+     * The calendar-query is defined in RFC4791 : CalDAV. Using the
+     * calendar-query it is possible for a client to request a specific set of
+     * object, based on contents of iCalendar properties, date-ranges and
+     * iCalendar component types (VTODO, VEVENT).
+     *
+     * This method should just return a list of (relative) urls that match this
+     * query.
+     *
+     * The list of filters are specified as an array. The exact array is
+     * documented by \Sabre\CalDAV\CalendarQueryParser.
+     *
+     * @param array $filters
+     * @return array
+     */
+    function calendarQuery(array $filters) {
+
+        $result = [];
+        $validator = new CalDAV\CalendarQueryValidator();
+
+        $objects = $this->caldavBackend->getSchedulingObjects($this->principalUri);
+        foreach ($objects as $object) {
+            $vObject = VObject\Reader::read($object['calendardata']);
+            if ($validator->validate($vObject, $filters)) {
+                $result[] = $object['uri'];
+            }
+
+            // Destroy circular references to PHP will GC the object.
+            $vObject->destroy();
+        }
+        return $result;
+
+    }
+
+}

vendor/sabre/dav/lib/CalDAV/Schedule/Outbox.php

@@ -1,6 +1,7 @@
 <?php
 
 namespace Sabre\CalDAV\Schedule;
+
 use Sabre\DAV;
 use Sabre\CalDAV;
 use Sabre\DAVACL;
@@ -12,7 +13,7 @@ use Sabre\DAVACL;
  * free-busy requests. This functionality is completely handled by the
  * Scheduling plugin, so this object is actually mostly static.
  *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
@@ -30,7 +31,7 @@ class Outbox extends DAV\Collection implements IOutbox {
      *
      * @param string $principalUri
      */
-    public function __construct($principalUri) {
+    function __construct($principalUri) {
 
         $this->principalUri = $principalUri;
 
@@ -43,7 +44,7 @@ class Outbox extends DAV\Collection implements IOutbox {
      *
      * @return string
      */
-    public function getName() {
+    function getName() {
 
         return 'outbox';
 
@@ -54,9 +55,9 @@ class Outbox extends DAV\Collection implements IOutbox {
      *
      * @return \Sabre\DAV\INode[]
      */
-    public function getChildren() {
+    function getChildren() {
 
-        return array();
+        return [];
 
     }
 
@@ -67,7 +68,7 @@ class Outbox extends DAV\Collection implements IOutbox {
      *
      * @return string|null
      */
-    public function getOwner() {
+    function getOwner() {
 
         return $this->principalUri;
 
@@ -80,7 +81,7 @@ class Outbox extends DAV\Collection implements IOutbox {
      *
      * @return string|null
      */
-    public function getGroup() {
+    function getGroup() {
 
         return null;
 
@@ -98,25 +99,45 @@ class Outbox extends DAV\Collection implements IOutbox {
      *
      * @return array
      */
-    public function getACL() {
+    function getACL() {
 
-        return array(
-            array(
+        return [
+            [
                 'privilege' => '{' . CalDAV\Plugin::NS_CALDAV . '}schedule-query-freebusy',
                 'principal' => $this->getOwner(),
                 'protected' => true,
-            ),
-            array(
+            ],
+            [
                 'privilege' => '{' . CalDAV\Plugin::NS_CALDAV . '}schedule-post-vevent',
                 'principal' => $this->getOwner(),
                 'protected' => true,
-            ),
-            array(
+            ],
+            [
                 'privilege' => '{DAV:}read',
                 'principal' => $this->getOwner(),
                 'protected' => true,
-            ),
-        );
+            ],
+            [
+                'privilege' => '{' . CalDAV\Plugin::NS_CALDAV . '}schedule-query-freebusy',
+                'principal' => $this->getOwner() . '/calendar-proxy-write',
+                'protected' => true,
+            ],
+            [
+                'privilege' => '{' . CalDAV\Plugin::NS_CALDAV . '}schedule-post-vevent',
+                'principal' => $this->getOwner() . '/calendar-proxy-write',
+                'protected' => true,
+            ],
+            [
+                'privilege' => '{DAV:}read',
+                'principal' => $this->getOwner() . '/calendar-proxy-read',
+                'protected' => true,
+            ],
+            [
+                'privilege' => '{DAV:}read',
+                'principal' => $this->getOwner() . '/calendar-proxy-write',
+                'protected' => true,
+            ],
+        ];
 
     }
 
@@ -128,7 +149,7 @@ class Outbox extends DAV\Collection implements IOutbox {
      * @param array $acl
      * @return void
      */
-    public function setACL(array $acl) {
+    function setACL(array $acl) {
 
         throw new DAV\Exception\MethodNotAllowed('You\'re not allowed to update the ACL');
 
@@ -146,15 +167,15 @@ class Outbox extends DAV\Collection implements IOutbox {
      *
      * @return array|null
      */
-    public function getSupportedPrivilegeSet() {
+    function getSupportedPrivilegeSet() {
 
         $default = DAVACL\Plugin::getDefaultSupportedPrivilegeSet();
-        $default['aggregates'][] = array(
+        $default['aggregates'][] = [
             'privilege' => '{' . CalDAV\Plugin::NS_CALDAV . '}schedule-query-freebusy',
-        );
-        $default['aggregates'][] = array(
+        ];
+        $default['aggregates'][] = [
             'privilege' => '{' . CalDAV\Plugin::NS_CALDAV . '}schedule-post-vevent',
-        );
+        ];
 
         return $default;
 

vendor/sabre/dav/lib/CalDAV/Schedule/Plugin.php

@@ -0,0 +1,994 @@
+<?php
+
+namespace Sabre\CalDAV\Schedule;
+
+use DateTimeZone;
+use Sabre\DAV\Server;
+use Sabre\DAV\ServerPlugin;
+use Sabre\DAV\PropFind;
+use Sabre\DAV\PropPatch;
+use Sabre\DAV\INode;
+use Sabre\DAV\Xml\Property\Href;
+use Sabre\HTTP\RequestInterface;
+use Sabre\HTTP\ResponseInterface;
+use Sabre\VObject;
+use Sabre\VObject\Reader;
+use Sabre\VObject\Component\VCalendar;
+use Sabre\VObject\ITip;
+use Sabre\VObject\ITip\Message;
+use Sabre\DAVACL;
+use Sabre\CalDAV\ICalendar;
+use Sabre\CalDAV\ICalendarObject;
+use Sabre\CalDAV\Xml\Property\ScheduleCalendarTransp;
+use Sabre\DAV\Exception\NotFound;
+use Sabre\DAV\Exception\Forbidden;
+use Sabre\DAV\Exception\BadRequest;
+use Sabre\DAV\Exception\NotImplemented;
+
+/**
+ * CalDAV scheduling plugin.
+ * =========================
+ *
+ * This plugin provides the functionality added by the "Scheduling Extensions
+ * to CalDAV" standard, as defined in RFC6638.
+ *
+ * calendar-auto-schedule largely works by intercepting a users request to
+ * update their local calendar. If a user creates a new event with attendees,
+ * this plugin is supposed to grab the information from that event, and notify
+ * the attendees of this.
+ *
+ * There's 3 possible transports for this:
+ * * local delivery
+ * * delivery through email (iMip)
+ * * server-to-server delivery (iSchedule)
+ *
+ * iMip is simply, because we just need to add the iTip message as an email
+ * attachment. Local delivery is harder, because we both need to add this same
+ * message to a local DAV inbox, as well as live-update the relevant events.
+ *
+ * iSchedule is something for later.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class Plugin extends ServerPlugin {
+
+    /**
+     * This is the official CalDAV namespace
+     */
+    const NS_CALDAV = 'urn:ietf:params:xml:ns:caldav';
+
+    /**
+     * Reference to main Server object.
+     *
+     * @var Server
+     */
+    protected $server;
+
+    /**
+     * Returns a list of features for the DAV: HTTP header.
+     *
+     * @return array
+     */
+    function getFeatures() {
+
+        return ['calendar-auto-schedule', 'calendar-availability'];
+
+    }
+
+    /**
+     * Returns the name of the plugin.
+     *
+     * Using this name other plugins will be able to access other plugins
+     * using Server::getPlugin
+     *
+     * @return string
+     */
+    function getPluginName() {
+
+        return 'caldav-schedule';
+
+    }
+
+    /**
+     * Initializes the plugin
+     *
+     * @param Server $server
+     * @return void
+     */
+    function initialize(Server $server) {
+
+        $this->server = $server;
+        $server->on('method:POST',          [$this, 'httpPost']);
+        $server->on('propFind',             [$this, 'propFind']);
+        $server->on('propPatch',            [$this, 'propPatch']);
+        $server->on('calendarObjectChange', [$this, 'calendarObjectChange']);
+        $server->on('beforeUnbind',         [$this, 'beforeUnbind']);
+        $server->on('schedule',             [$this, 'scheduleLocalDelivery']);
+
+        $ns = '{' . self::NS_CALDAV . '}';
+
+        /**
+         * This information ensures that the {DAV:}resourcetype property has
+         * the correct values.
+         */
+        $server->resourceTypeMapping['\\Sabre\\CalDAV\\Schedule\\IOutbox'] = $ns . 'schedule-outbox';
+        $server->resourceTypeMapping['\\Sabre\\CalDAV\\Schedule\\IInbox'] = $ns . 'schedule-inbox';
+
+        /**
+         * Properties we protect are made read-only by the server.
+         */
+        array_push($server->protectedProperties,
+            $ns . 'schedule-inbox-URL',
+            $ns . 'schedule-outbox-URL',
+            $ns . 'calendar-user-address-set',
+            $ns . 'calendar-user-type',
+            $ns . 'schedule-default-calendar-URL'
+        );
+
+    }
+
+    /**
+     * Use this method to tell the server this plugin defines additional
+     * HTTP methods.
+     *
+     * This method is passed a uri. It should only return HTTP methods that are
+     * available for the specified uri.
+     *
+     * @param string $uri
+     * @return array
+     */
+    function getHTTPMethods($uri) {
+
+        try {
+            $node = $this->server->tree->getNodeForPath($uri);
+        } catch (NotFound $e) {
+            return [];
+        }
+
+        if ($node instanceof IOutbox) {
+            return ['POST'];
+        }
+
+        return [];
+
+    }
+
+    /**
+     * This method handles POST request for the outbox.
+     *
+     * @param RequestInterface $request
+     * @param ResponseInterface $response
+     * @return bool
+     */
+    function httpPost(RequestInterface $request, ResponseInterface $response) {
+
+        // Checking if this is a text/calendar content type
+        $contentType = $request->getHeader('Content-Type');
+        if (strpos($contentType, 'text/calendar') !== 0) {
+            return;
+        }
+
+        $path = $request->getPath();
+
+        // Checking if we're talking to an outbox
+        try {
+            $node = $this->server->tree->getNodeForPath($path);
+        } catch (NotFound $e) {
+            return;
+        }
+        if (!$node instanceof IOutbox)
+            return;
+
+        $this->server->transactionType = 'post-caldav-outbox';
+        $this->outboxRequest($node, $request, $response);
+
+        // Returning false breaks the event chain and tells the server we've
+        // handled the request.
+        return false;
+
+    }
+
+    /**
+     * This method handler is invoked during fetching of properties.
+     *
+     * We use this event to add calendar-auto-schedule-specific properties.
+     *
+     * @param PropFind $propFind
+     * @param INode $node
+     * @return void
+     */
+    function propFind(PropFind $propFind, INode $node) {
+
+        if ($node instanceof DAVACL\IPrincipal) {
+
+            $caldavPlugin = $this->server->getPlugin('caldav');
+            $principalUrl = $node->getPrincipalUrl();
+
+            // schedule-outbox-URL property
+            $propFind->handle('{' . self::NS_CALDAV . '}schedule-outbox-URL', function() use ($principalUrl, $caldavPlugin) {
+
+                $calendarHomePath = $caldavPlugin->getCalendarHomeForPrincipal($principalUrl);
+                if (!$calendarHomePath) {
+                    return null;
+                }
+                $outboxPath = $calendarHomePath . '/outbox/';
+
+                return new Href($outboxPath);
+
+            });
+            // schedule-inbox-URL property
+            $propFind->handle('{' . self::NS_CALDAV . '}schedule-inbox-URL', function() use ($principalUrl, $caldavPlugin) {
+
+                $calendarHomePath = $caldavPlugin->getCalendarHomeForPrincipal($principalUrl);
+                if (!$calendarHomePath) {
+                    return null;
+                }
+                $inboxPath = $calendarHomePath . '/inbox/';
+
+                return new Href($inboxPath);
+
+            });
+
+            $propFind->handle('{' . self::NS_CALDAV . '}schedule-default-calendar-URL', function() use ($principalUrl, $caldavPlugin) {
+
+                // We don't support customizing this property yet, so in the
+                // meantime we just grab the first calendar in the home-set.
+                $calendarHomePath = $caldavPlugin->getCalendarHomeForPrincipal($principalUrl);
+
+                if (!$calendarHomePath) {
+                    return null;
+                }
+
+                $sccs = '{' . self::NS_CALDAV . '}supported-calendar-component-set';
+
+                $result = $this->server->getPropertiesForPath($calendarHomePath, [
+                    '{DAV:}resourcetype',
+                    $sccs,
+                ], 1);
+
+                foreach ($result as $child) {
+                    if (!isset($child[200]['{DAV:}resourcetype']) || !$child[200]['{DAV:}resourcetype']->is('{' . self::NS_CALDAV . '}calendar') || $child[200]['{DAV:}resourcetype']->is('{http://calendarserver.org/ns/}shared')) {
+                        // Node is either not a calendar or a shared instance.
+                        continue;
+                    }
+                    if (!isset($child[200][$sccs]) || in_array('VEVENT', $child[200][$sccs]->getValue())) {
+                        // Either there is no supported-calendar-component-set
+                        // (which is fine) or we found one that supports VEVENT.
+                        return new Href($child['href']);
+                    }
+                }
+
+            });
+
+            // The server currently reports every principal to be of type
+            // 'INDIVIDUAL'
+            $propFind->handle('{' . self::NS_CALDAV . '}calendar-user-type', function() {
+
+                return 'INDIVIDUAL';
+
+            });
+
+        }
+
+        // Mapping the old property to the new property.
+        $propFind->handle('{http://calendarserver.org/ns/}calendar-availability', function() use ($propFind, $node) {
+
+             // In case it wasn't clear, the only difference is that we map the
+            // old property to a different namespace.
+             $availProp = '{' . self::NS_CALDAV . '}calendar-availability';
+             $subPropFind = new PropFind(
+                 $propFind->getPath(),
+                 [$availProp]
+             );
+
+             $this->server->getPropertiesByNode(
+                 $subPropFind,
+                 $node
+             );
+
+             $propFind->set(
+                 '{http://calendarserver.org/ns/}calendar-availability',
+                 $subPropFind->get($availProp),
+                 $subPropFind->getStatus($availProp)
+             );
+
+        });
+
+    }
+
+    /**
+     * This method is called during property updates.
+     *
+     * @param string $path
+     * @param PropPatch $propPatch
+     * @return void
+     */
+    function propPatch($path, PropPatch $propPatch) {
+
+        // Mapping the old property to the new property.
+        $propPatch->handle('{http://calendarserver.org/ns/}calendar-availability', function($value) use ($path) {
+
+            $availProp = '{' . self::NS_CALDAV . '}calendar-availability';
+            $subPropPatch = new PropPatch([$availProp => $value]);
+            $this->server->emit('propPatch', [$path, $subPropPatch]);
+            $subPropPatch->commit();
+
+            return $subPropPatch->getResult()[$availProp];
+
+        });
+
+    }
+
+    /**
+     * This method is triggered whenever there was a calendar object gets
+     * created or updated.
+     *
+     * @param RequestInterface $request HTTP request
+     * @param ResponseInterface $response HTTP Response
+     * @param VCalendar $vCal Parsed iCalendar object
+     * @param mixed $calendarPath Path to calendar collection
+     * @param mixed $modified The iCalendar object has been touched.
+     * @param mixed $isNew Whether this was a new item or we're updating one
+     * @return void
+     */
+    function calendarObjectChange(RequestInterface $request, ResponseInterface $response, VCalendar $vCal, $calendarPath, &$modified, $isNew) {
+
+        if (!$this->scheduleReply($this->server->httpRequest)) {
+            return;
+        }
+
+        $calendarNode = $this->server->tree->getNodeForPath($calendarPath);
+
+        $addresses = $this->getAddressesForPrincipal(
+            $calendarNode->getOwner()
+        );
+
+        if (!$isNew) {
+            $node = $this->server->tree->getNodeForPath($request->getPath());
+            $oldObj = Reader::read($node->get());
+        } else {
+            $oldObj = null;
+        }
+
+        $this->processICalendarChange($oldObj, $vCal, $addresses, [], $modified);
+
+        if ($oldObj) {
+            // Destroy circular references so PHP will GC the object.
+            $oldObj->destroy();
+        }
+
+    }
+
+    /**
+     * This method is responsible for delivering the ITip message.
+     *
+     * @param ITip\Message $itipMessage
+     * @return void
+     */
+    function deliver(ITip\Message $iTipMessage) {
+
+        $this->server->emit('schedule', [$iTipMessage]);
+        if (!$iTipMessage->scheduleStatus) {
+            $iTipMessage->scheduleStatus = '5.2;There was no system capable of delivering the scheduling message';
+        }
+        // In case the change was considered 'insignificant', we are going to
+        // remove any error statuses, if any. See ticket #525.
+        list($baseCode) = explode('.', $iTipMessage->scheduleStatus);
+        if (!$iTipMessage->significantChange && in_array($baseCode, ['3', '5'])) {
+            $iTipMessage->scheduleStatus = null;
+        }
+
+    }
+
+    /**
+     * This method is triggered before a file gets deleted.
+     *
+     * We use this event to make sure that when this happens, attendees get
+     * cancellations, and organizers get 'DECLINED' statuses.
+     *
+     * @param string $path
+     * @return void
+     */
+    function beforeUnbind($path) {
+
+        // FIXME: We shouldn't trigger this functionality when we're issuing a
+        // MOVE. This is a hack.
+        if ($this->server->httpRequest->getMethod() === 'MOVE') return;
+
+        $node = $this->server->tree->getNodeForPath($path);
+
+        if (!$node instanceof ICalendarObject || $node instanceof ISchedulingObject) {
+            return;
+        }
+
+        if (!$this->scheduleReply($this->server->httpRequest)) {
+            return;
+        }
+
+        $addresses = $this->getAddressesForPrincipal(
+            $node->getOwner()
+        );
+
+        $broker = new ITip\Broker();
+        $messages = $broker->parseEvent(null, $addresses, $node->get());
+
+        foreach ($messages as $message) {
+            $this->deliver($message);
+        }
+
+    }
+
+    /**
+     * Event handler for the 'schedule' event.
+     *
+     * This handler attempts to look at local accounts to deliver the
+     * scheduling object.
+     *
+     * @param ITip\Message $iTipMessage
+     * @return void
+     */
+    function scheduleLocalDelivery(ITip\Message $iTipMessage) {
+
+        $aclPlugin = $this->server->getPlugin('acl');
+
+        // Local delivery is not available if the ACL plugin is not loaded.
+        if (!$aclPlugin) {
+            return;
+        }
+
+        $caldavNS = '{' . self::NS_CALDAV . '}';
+
+        $principalUri = $aclPlugin->getPrincipalByUri($iTipMessage->recipient);
+        if (!$principalUri) {
+            $iTipMessage->scheduleStatus = '3.7;Could not find principal.';
+            return;
+        }
+
+        // We found a principal URL, now we need to find its inbox.
+        // Unfortunately we may not have sufficient privileges to find this, so
+        // we are temporarily turning off ACL to let this come through.
+        //
+        // Once we support PHP 5.5, this should be wrapped in a try..finally
+        // block so we can ensure that this privilege gets added again after.
+        $this->server->removeListener('propFind', [$aclPlugin, 'propFind']);
+
+        $result = $this->server->getProperties(
+            $principalUri,
+            [
+                '{DAV:}principal-URL',
+                 $caldavNS . 'calendar-home-set',
+                 $caldavNS . 'schedule-inbox-URL',
+                 $caldavNS . 'schedule-default-calendar-URL',
+                '{http://sabredav.org/ns}email-address',
+            ]
+        );
+
+        // Re-registering the ACL event
+        $this->server->on('propFind', [$aclPlugin, 'propFind'], 20);
+
+        if (!isset($result[$caldavNS . 'schedule-inbox-URL'])) {
+            $iTipMessage->scheduleStatus = '5.2;Could not find local inbox';
+            return;
+        }
+        if (!isset($result[$caldavNS . 'calendar-home-set'])) {
+            $iTipMessage->scheduleStatus = '5.2;Could not locate a calendar-home-set';
+            return;
+        }
+        if (!isset($result[$caldavNS . 'schedule-default-calendar-URL'])) {
+            $iTipMessage->scheduleStatus = '5.2;Could not find a schedule-default-calendar-URL property';
+            return;
+        }
+
+        $calendarPath = $result[$caldavNS . 'schedule-default-calendar-URL']->getHref();
+        $homePath = $result[$caldavNS . 'calendar-home-set']->getHref();
+        $inboxPath = $result[$caldavNS . 'schedule-inbox-URL']->getHref();
+
+        if ($iTipMessage->method === 'REPLY') {
+            $privilege = 'schedule-deliver-reply';
+        } else {
+            $privilege = 'schedule-deliver-invite';
+        }
+
+        if (!$aclPlugin->checkPrivileges($inboxPath, $caldavNS . $privilege, DAVACL\Plugin::R_PARENT, false)) {
+            $iTipMessage->scheduleStatus = '3.8;organizer did not have the ' . $privilege . ' privilege on the attendees inbox';
+            return;
+        }
+
+        // Next, we're going to find out if the item already exits in one of
+        // the users' calendars.
+        $uid = $iTipMessage->uid;
+
+        $newFileName = 'sabredav-' . \Sabre\DAV\UUIDUtil::getUUID() . '.ics';
+
+        $home = $this->server->tree->getNodeForPath($homePath);
+        $inbox = $this->server->tree->getNodeForPath($inboxPath);
+
+        $currentObject = null;
+        $objectNode = null;
+        $isNewNode = false;
+
+        $result = $home->getCalendarObjectByUID($uid);
+        if ($result) {
+            // There was an existing object, we need to update probably.
+            $objectPath = $homePath . '/' . $result;
+            $objectNode = $this->server->tree->getNodeForPath($objectPath);
+            $oldICalendarData = $objectNode->get();
+            $currentObject = Reader::read($oldICalendarData);
+        } else {
+            $isNewNode = true;
+        }
+
+        $broker = new ITip\Broker();
+        $newObject = $broker->processMessage($iTipMessage, $currentObject);
+
+        $inbox->createFile($newFileName, $iTipMessage->message->serialize());
+
+        if (!$newObject) {
+            // We received an iTip message referring to a UID that we don't
+            // have in any calendars yet, and processMessage did not give us a
+            // calendarobject back.
+            //
+            // The implication is that processMessage did not understand the
+            // iTip message.
+            $iTipMessage->scheduleStatus = '5.0;iTip message was not processed by the server, likely because we didn\'t understand it.';
+            return;
+        }
+
+        // Note that we are bypassing ACL on purpose by calling this directly.
+        // We may need to look a bit deeper into this later. Supporting ACL
+        // here would be nice.
+        if ($isNewNode) {
+            $calendar = $this->server->tree->getNodeForPath($calendarPath);
+            $calendar->createFile($newFileName, $newObject->serialize());
+        } else {
+            // If the message was a reply, we may have to inform other
+            // attendees of this attendees status. Therefore we're shooting off
+            // another itipMessage.
+            if ($iTipMessage->method === 'REPLY') {
+                $this->processICalendarChange(
+                    $oldICalendarData,
+                    $newObject,
+                    [$iTipMessage->recipient],
+                    [$iTipMessage->sender]
+                );
+            }
+            $objectNode->put($newObject->serialize());
+        }
+        $iTipMessage->scheduleStatus = '1.2;Message delivered locally';
+
+    }
+
+    /**
+     * This method looks at an old iCalendar object, a new iCalendar object and
+     * starts sending scheduling messages based on the changes.
+     *
+     * A list of addresses needs to be specified, so the system knows who made
+     * the update, because the behavior may be different based on if it's an
+     * attendee or an organizer.
+     *
+     * This method may update $newObject to add any status changes.
+     *
+     * @param VCalendar|string $oldObject
+     * @param VCalendar $newObject
+     * @param array $addresses
+     * @param array $ignore Any addresses to not send messages to.
+     * @param bool $modified A marker to indicate that the original object
+     *   modified by this process.
+     * @return void
+     */
+    protected function processICalendarChange($oldObject = null, VCalendar $newObject, array $addresses, array $ignore = [], &$modified = false) {
+
+        $broker = new ITip\Broker();
+        $messages = $broker->parseEvent($newObject, $addresses, $oldObject);
+
+        if ($messages) $modified = true;
+
+        foreach ($messages as $message) {
+
+            if (in_array($message->recipient, $ignore)) {
+                continue;
+            }
+
+            $this->deliver($message);
+
+            if (isset($newObject->VEVENT->ORGANIZER) && ($newObject->VEVENT->ORGANIZER->getNormalizedValue() === $message->recipient)) {
+                if ($message->scheduleStatus) {
+                    $newObject->VEVENT->ORGANIZER['SCHEDULE-STATUS'] = $message->getScheduleStatus();
+                }
+                unset($newObject->VEVENT->ORGANIZER['SCHEDULE-FORCE-SEND']);
+
+            } else {
+
+                if (isset($newObject->VEVENT->ATTENDEE)) foreach ($newObject->VEVENT->ATTENDEE as $attendee) {
+
+                    if ($attendee->getNormalizedValue() === $message->recipient) {
+                        if ($message->scheduleStatus) {
+                            $attendee['SCHEDULE-STATUS'] = $message->getScheduleStatus();
+                        }
+                        unset($attendee['SCHEDULE-FORCE-SEND']);
+                        break;
+                    }
+
+                }
+
+            }
+
+        }
+
+    }
+
+    /**
+     * Returns a list of addresses that are associated with a principal.
+     *
+     * @param string $principal
+     * @return array
+     */
+    protected function getAddressesForPrincipal($principal) {
+
+        $CUAS = '{' . self::NS_CALDAV . '}calendar-user-address-set';
+
+        $properties = $this->server->getProperties(
+            $principal,
+            [$CUAS]
+        );
+
+        // If we can't find this information, we'll stop processing
+        if (!isset($properties[$CUAS])) {
+            return;
+        }
+
+        $addresses = $properties[$CUAS]->getHrefs();
+        return $addresses;
+
+    }
+
+    /**
+     * This method handles POST requests to the schedule-outbox.
+     *
+     * Currently, two types of requests are support:
+     *   * FREEBUSY requests from RFC 6638
+     *   * Simple iTIP messages from draft-desruisseaux-caldav-sched-04
+     *
+     * The latter is from an expired early draft of the CalDAV scheduling
+     * extensions, but iCal depends on a feature from that spec, so we
+     * implement it.
+     *
+     * @param IOutbox $outboxNode
+     * @param RequestInterface $request
+     * @param ResponseInterface $response
+     * @return void
+     */
+    function outboxRequest(IOutbox $outboxNode, RequestInterface $request, ResponseInterface $response) {
+
+        $outboxPath = $request->getPath();
+
+        // Parsing the request body
+        try {
+            $vObject = VObject\Reader::read($request->getBody());
+        } catch (VObject\ParseException $e) {
+            throw new BadRequest('The request body must be a valid iCalendar object. Parse error: ' . $e->getMessage());
+        }
+
+        // The incoming iCalendar object must have a METHOD property, and a
+        // component. The combination of both determines what type of request
+        // this is.
+        $componentType = null;
+        foreach ($vObject->getComponents() as $component) {
+            if ($component->name !== 'VTIMEZONE') {
+                $componentType = $component->name;
+                break;
+            }
+        }
+        if (is_null($componentType)) {
+            throw new BadRequest('We expected at least one VTODO, VJOURNAL, VFREEBUSY or VEVENT component');
+        }
+
+        // Validating the METHOD
+        $method = strtoupper((string)$vObject->METHOD);
+        if (!$method) {
+            throw new BadRequest('A METHOD property must be specified in iTIP messages');
+        }
+
+        // So we support one type of request:
+        //
+        // REQUEST with a VFREEBUSY component
+
+        $acl = $this->server->getPlugin('acl');
+
+        if ($componentType === 'VFREEBUSY' && $method === 'REQUEST') {
+
+            $acl && $acl->checkPrivileges($outboxPath, '{' . self::NS_CALDAV . '}schedule-query-freebusy');
+            $this->handleFreeBusyRequest($outboxNode, $vObject, $request, $response);
+
+            // Destroy circular references so PHP can GC the object.
+            $vObject->destroy();
+            unset($vObject);
+
+        } else {
+
+            throw new NotImplemented('We only support VFREEBUSY (REQUEST) on this endpoint');
+
+        }
+
+    }
+
+    /**
+     * This method is responsible for parsing a free-busy query request and
+     * returning it's result.
+     *
+     * @param IOutbox $outbox
+     * @param VObject\Component $vObject
+     * @param RequestInterface $request
+     * @param ResponseInterface $response
+     * @return string
+     */
+    protected function handleFreeBusyRequest(IOutbox $outbox, VObject\Component $vObject, RequestInterface $request, ResponseInterface $response) {
+
+        $vFreeBusy = $vObject->VFREEBUSY;
+        $organizer = $vFreeBusy->organizer;
+
+        $organizer = (string)$organizer;
+
+        // Validating if the organizer matches the owner of the inbox.
+        $owner = $outbox->getOwner();
+
+        $caldavNS = '{' . self::NS_CALDAV . '}';
+
+        $uas = $caldavNS . 'calendar-user-address-set';
+        $props = $this->server->getProperties($owner, [$uas]);
+
+        if (empty($props[$uas]) || !in_array($organizer, $props[$uas]->getHrefs())) {
+            throw new Forbidden('The organizer in the request did not match any of the addresses for the owner of this inbox');
+        }
+
+        if (!isset($vFreeBusy->ATTENDEE)) {
+            throw new BadRequest('You must at least specify 1 attendee');
+        }
+
+        $attendees = [];
+        foreach ($vFreeBusy->ATTENDEE as $attendee) {
+            $attendees[] = (string)$attendee;
+        }
+
+
+        if (!isset($vFreeBusy->DTSTART) || !isset($vFreeBusy->DTEND)) {
+            throw new BadRequest('DTSTART and DTEND must both be specified');
+        }
+
+        $startRange = $vFreeBusy->DTSTART->getDateTime();
+        $endRange = $vFreeBusy->DTEND->getDateTime();
+
+        $results = [];
+        foreach ($attendees as $attendee) {
+            $results[] = $this->getFreeBusyForEmail($attendee, $startRange, $endRange, $vObject);
+        }
+
+        $dom = new \DOMDocument('1.0', 'utf-8');
+        $dom->formatOutput = true;
+        $scheduleResponse = $dom->createElement('cal:schedule-response');
+        foreach ($this->server->xml->namespaceMap as $namespace => $prefix) {
+
+            $scheduleResponse->setAttribute('xmlns:' . $prefix, $namespace);
+
+        }
+        $dom->appendChild($scheduleResponse);
+
+        foreach ($results as $result) {
+            $xresponse = $dom->createElement('cal:response');
+
+            $recipient = $dom->createElement('cal:recipient');
+            $recipientHref = $dom->createElement('d:href');
+
+            $recipientHref->appendChild($dom->createTextNode($result['href']));
+            $recipient->appendChild($recipientHref);
+            $xresponse->appendChild($recipient);
+
+            $reqStatus = $dom->createElement('cal:request-status');
+            $reqStatus->appendChild($dom->createTextNode($result['request-status']));
+            $xresponse->appendChild($reqStatus);
+
+            if (isset($result['calendar-data'])) {
+
+                $calendardata = $dom->createElement('cal:calendar-data');
+                $calendardata->appendChild($dom->createTextNode(str_replace("\r\n", "\n", $result['calendar-data']->serialize())));
+                $xresponse->appendChild($calendardata);
+
+            }
+            $scheduleResponse->appendChild($xresponse);
+        }
+
+        $response->setStatus(200);
+        $response->setHeader('Content-Type', 'application/xml');
+        $response->setBody($dom->saveXML());
+
+    }
+
+    /**
+     * Returns free-busy information for a specific address. The returned
+     * data is an array containing the following properties:
+     *
+     * calendar-data : A VFREEBUSY VObject
+     * request-status : an iTip status code.
+     * href: The principal's email address, as requested
+     *
+     * The following request status codes may be returned:
+     *   * 2.0;description
+     *   * 3.7;description
+     *
+     * @param string $email address
+     * @param DateTimeInterface $start
+     * @param DateTimeInterface $end
+     * @param VObject\Component $request
+     * @return array
+     */
+    protected function getFreeBusyForEmail($email, \DateTimeInterface $start, \DateTimeInterface $end, VObject\Component $request) {
+
+        $caldavNS = '{' . self::NS_CALDAV . '}';
+
+        $aclPlugin = $this->server->getPlugin('acl');
+        if (substr($email, 0, 7) === 'mailto:') $email = substr($email, 7);
+
+        $result = $aclPlugin->principalSearch(
+            ['{http://sabredav.org/ns}email-address' => $email],
+            [
+                '{DAV:}principal-URL',
+                $caldavNS . 'calendar-home-set',
+                $caldavNS . 'schedule-inbox-URL',
+                '{http://sabredav.org/ns}email-address',
+
+            ]
+        );
+
+        if (!count($result)) {
+            return [
+                'request-status' => '3.7;Could not find principal',
+                'href'           => 'mailto:' . $email,
+            ];
+        }
+
+        if (!isset($result[0][200][$caldavNS . 'calendar-home-set'])) {
+            return [
+                'request-status' => '3.7;No calendar-home-set property found',
+                'href'           => 'mailto:' . $email,
+            ];
+        }
+        if (!isset($result[0][200][$caldavNS . 'schedule-inbox-URL'])) {
+            return [
+                'request-status' => '3.7;No schedule-inbox-URL property found',
+                'href'           => 'mailto:' . $email,
+            ];
+        }
+        $homeSet = $result[0][200][$caldavNS . 'calendar-home-set']->getHref();
+        $inboxUrl = $result[0][200][$caldavNS . 'schedule-inbox-URL']->getHref();
+
+        // Grabbing the calendar list
+        $objects = [];
+        $calendarTimeZone = new DateTimeZone('UTC');
+
+        foreach ($this->server->tree->getNodeForPath($homeSet)->getChildren() as $node) {
+            if (!$node instanceof ICalendar) {
+                continue;
+            }
+
+            $sct = $caldavNS . 'schedule-calendar-transp';
+            $ctz = $caldavNS . 'calendar-timezone';
+            $props = $node->getProperties([$sct, $ctz]);
+
+            if (isset($props[$sct]) && $props[$sct]->getValue() == ScheduleCalendarTransp::TRANSPARENT) {
+                // If a calendar is marked as 'transparent', it means we must
+                // ignore it for free-busy purposes.
+                continue;
+            }
+
+            $aclPlugin->checkPrivileges($homeSet . $node->getName(), $caldavNS . 'read-free-busy');
+
+            if (isset($props[$ctz])) {
+                $vtimezoneObj = VObject\Reader::read($props[$ctz]);
+                $calendarTimeZone = $vtimezoneObj->VTIMEZONE->getTimeZone();
+
+                // Destroy circular references so PHP can garbage collect the object.
+                $vtimezoneObj->destroy();
+
+            }
+
+            // Getting the list of object uris within the time-range
+            $urls = $node->calendarQuery([
+                'name'         => 'VCALENDAR',
+                'comp-filters' => [
+                    [
+                        'name'           => 'VEVENT',
+                        'comp-filters'   => [],
+                        'prop-filters'   => [],
+                        'is-not-defined' => false,
+                        'time-range'     => [
+                            'start' => $start,
+                            'end'   => $end,
+                        ],
+                    ],
+                ],
+                'prop-filters'   => [],
+                'is-not-defined' => false,
+                'time-range'     => null,
+            ]);
+
+            $calObjects = array_map(function($url) use ($node) {
+                $obj = $node->getChild($url)->get();
+                return $obj;
+            }, $urls);
+
+            $objects = array_merge($objects, $calObjects);
+
+        }
+
+        $inboxProps = $this->server->getProperties(
+            $inboxUrl,
+            $caldavNS . 'calendar-availability'
+        );
+
+        $vcalendar = new VObject\Component\VCalendar();
+        $vcalendar->METHOD = 'REPLY';
+
+        $generator = new VObject\FreeBusyGenerator();
+        $generator->setObjects($objects);
+        $generator->setTimeRange($start, $end);
+        $generator->setBaseObject($vcalendar);
+        $generator->setTimeZone($calendarTimeZone);
+
+        if ($inboxProps) {
+            $generator->setVAvailability(
+                VObject\Reader::read(
+                    $inboxProps[$caldavNS . 'calendar-availability']
+                )
+            );
+        }
+
+        $result = $generator->getResult();
+
+        $vcalendar->VFREEBUSY->ATTENDEE = 'mailto:' . $email;
+        $vcalendar->VFREEBUSY->UID = (string)$request->VFREEBUSY->UID;
+        $vcalendar->VFREEBUSY->ORGANIZER = clone $request->VFREEBUSY->ORGANIZER;
+
+        return [
+            'calendar-data'  => $result,
+            'request-status' => '2.0;Success',
+            'href'           => 'mailto:' . $email,
+        ];
+    }
+
+    /**
+     * This method checks the 'Schedule-Reply' header
+     * and returns false if it's 'F', otherwise true.
+     *
+     * @param RequestInterface $request
+     * @return bool
+     */
+    private function scheduleReply(RequestInterface $request) {
+
+        $scheduleReply = $request->getHeader('Schedule-Reply');
+        return $scheduleReply !== 'F';
+
+    }
+
+    /**
+     * Returns a bunch of meta-data about the plugin.
+     *
+     * Providing this information is optional, and is mainly displayed by the
+     * Browser plugin.
+     *
+     * The description key in the returned array may contain html and will not
+     * be sanitized.
+     *
+     * @return array
+     */
+    function getPluginInfo() {
+
+        return [
+            'name'        => $this->getPluginName(),
+            'description' => 'Adds calendar-auto-schedule, as defined in rf6868',
+            'link'        => 'http://sabre.io/dav/scheduling/',
+        ];
+
+    }
+}

vendor/sabre/dav/lib/CalDAV/Schedule/SchedulingObject.php

@@ -0,0 +1,165 @@
+<?php
+
+namespace Sabre\CalDAV\Schedule;
+
+use Sabre\CalDAV\Backend;
+use Sabre\DAV\Exception\MethodNotAllowed;
+
+/**
+ * The SchedulingObject represents a scheduling object in the Inbox collection
+ *
+ * @author Brett (https://github.com/bretten)
+ * @license http://sabre.io/license/ Modified BSD License
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ */
+class SchedulingObject extends \Sabre\CalDAV\CalendarObject implements ISchedulingObject {
+
+    /**
+     /* The CalDAV backend
+     *
+     * @var Backend\SchedulingSupport
+     */
+    protected $caldavBackend;
+
+    /**
+     * Array with information about this SchedulingObject
+     *
+     * @var array
+     */
+    protected $objectData;
+
+    /**
+     * Constructor
+     *
+     * The following properties may be passed within $objectData:
+     *
+     *   * uri - A unique uri. Only the 'basename' must be passed.
+     *   * principaluri - the principal that owns the object.
+     *   * calendardata (optional) - The iCalendar data
+     *   * etag - (optional) The etag for this object, MUST be encloded with
+     *            double-quotes.
+     *   * size - (optional) The size of the data in bytes.
+     *   * lastmodified - (optional) format as a unix timestamp.
+     *   * acl - (optional) Use this to override the default ACL for the node.
+     *
+     * @param Backend\BackendInterface $caldavBackend
+     * @param array $objectData
+     */
+    function __construct(Backend\SchedulingSupport $caldavBackend, array $objectData) {
+
+        $this->caldavBackend = $caldavBackend;
+
+        if (!isset($objectData['uri'])) {
+            throw new \InvalidArgumentException('The objectData argument must contain an \'uri\' property');
+        }
+
+        $this->objectData = $objectData;
+
+    }
+
+    /**
+     * Returns the ICalendar-formatted object
+     *
+     * @return string
+     */
+    function get() {
+
+        // Pre-populating the 'calendardata' is optional, if we don't have it
+        // already we fetch it from the backend.
+        if (!isset($this->objectData['calendardata'])) {
+            $this->objectData = $this->caldavBackend->getSchedulingObject($this->objectData['principaluri'], $this->objectData['uri']);
+        }
+        return $this->objectData['calendardata'];
+
+    }
+
+    /**
+     * Updates the ICalendar-formatted object
+     *
+     * @param string|resource $calendarData
+     * @return string
+     */
+    function put($calendarData) {
+
+        throw new MethodNotAllowed('Updating scheduling objects is not supported');
+
+    }
+
+    /**
+     * Deletes the scheduling message
+     *
+     * @return void
+     */
+    function delete() {
+
+        $this->caldavBackend->deleteSchedulingObject($this->objectData['principaluri'], $this->objectData['uri']);
+
+    }
+
+    /**
+     * Returns the owner principal
+     *
+     * This must be a url to a principal, or null if there's no owner
+     *
+     * @return string|null
+     */
+    function getOwner() {
+
+        return $this->objectData['principaluri'];
+
+    }
+
+
+    /**
+     * Returns a list of ACE's for this node.
+     *
+     * Each ACE has the following properties:
+     *   * 'privilege', a string such as {DAV:}read or {DAV:}write. These are
+     *     currently the only supported privileges
+     *   * 'principal', a url to the principal who owns the node
+     *   * 'protected' (optional), indicating that this ACE is not allowed to
+     *      be updated.
+     *
+     * @return array
+     */
+    function getACL() {
+
+        // An alternative acl may be specified in the object data.
+        //
+
+        if (isset($this->objectData['acl'])) {
+            return $this->objectData['acl'];
+        }
+
+        // The default ACL
+        return [
+            [
+                'privilege' => '{DAV:}read',
+                'principal' => $this->objectData['principaluri'],
+                'protected' => true,
+            ],
+            [
+                'privilege' => '{DAV:}write',
+                'principal' => $this->objectData['principaluri'],
+                'protected' => true,
+            ],
+            [
+                'privilege' => '{DAV:}read',
+                'principal' => $this->objectData['principaluri'] . '/calendar-proxy-write',
+                'protected' => true,
+            ],
+            [
+                'privilege' => '{DAV:}write',
+                'principal' => $this->objectData['principaluri'] . '/calendar-proxy-write',
+                'protected' => true,
+            ],
+            [
+                'privilege' => '{DAV:}read',
+                'principal' => $this->objectData['principaluri'] . '/calendar-proxy-read',
+                'protected' => true,
+            ],
+        ];
+
+    }
+
+}

vendor/sabre/dav/lib/CalDAV/ShareableCalendar.php

@@ -6,7 +6,7 @@ namespace Sabre\CalDAV;
  * This object represents a CalDAV calendar that can be shared with other
  * users.
  *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
@@ -30,7 +30,7 @@ class ShareableCalendar extends Calendar implements IShareableCalendar {
      * @param array $remove
      * @return void
      */
-    public function updateShares(array $add, array $remove) {
+    function updateShares(array $add, array $remove) {
 
         $this->caldavBackend->updateShares($this->calendarInfo['id'], $add, $remove);
 
@@ -48,7 +48,7 @@ class ShareableCalendar extends Calendar implements IShareableCalendar {
      *
      * @return array
      */
-    public function getShares() {
+    function getShares() {
 
         return $this->caldavBackend->getShares($this->calendarInfo['id']);
 
@@ -63,7 +63,7 @@ class ShareableCalendar extends Calendar implements IShareableCalendar {
      * @param bool $value
      * @return void
      */
-    public function setPublishStatus($value) {
+    function setPublishStatus($value) {
 
         $this->caldavBackend->setPublishStatus($this->calendarInfo['id'], $value);
 

vendor/sabre/dav/lib/CalDAV/SharedCalendar.php

@@ -2,12 +2,10 @@
 
 namespace Sabre\CalDAV;
 
-use Sabre\DAVACL;
-
 /**
  * This object represents a CalDAV calendar that is shared by a different user.
  *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
@@ -19,13 +17,13 @@ class SharedCalendar extends Calendar implements ISharedCalendar {
      * @param Backend\BackendInterface $caldavBackend
      * @param array $calendarInfo
      */
-    public function __construct(Backend\BackendInterface $caldavBackend, $calendarInfo) {
+    function __construct(Backend\BackendInterface $caldavBackend, $calendarInfo) {
 
-        $required = array(
+        $required = [
             '{http://calendarserver.org/ns/}shared-url',
             '{http://sabredav.org/ns}owner-principal',
             '{http://sabredav.org/ns}read-only',
-        );
+        ];
         foreach ($required as $r) {
             if (!isset($calendarInfo[$r])) {
                 throw new \InvalidArgumentException('The ' . $r . ' property must be specified for SharedCalendar(s)');
@@ -42,7 +40,7 @@ class SharedCalendar extends Calendar implements ISharedCalendar {
      *
      * @return string
      */
-    public function getSharedUrl() {
+    function getSharedUrl() {
 
         return $this->calendarInfo['{http://calendarserver.org/ns/}shared-url'];
 
@@ -55,7 +53,7 @@ class SharedCalendar extends Calendar implements ISharedCalendar {
      *
      * @return string|null
      */
-    public function getOwner() {
+    function getOwner() {
 
         return $this->calendarInfo['{http://sabredav.org/ns}owner-principal'];
 
@@ -73,28 +71,62 @@ class SharedCalendar extends Calendar implements ISharedCalendar {
      *
      * @return array
      */
-    public function getACL() {
+    function getACL() {
 
         // The top-level ACL only contains access information for the true
         // owner of the calendar, so we need to add the information for the
         // sharee.
         $acl = parent::getACL();
-        $acl[] = array(
+        $acl[] = [
             'privilege' => '{DAV:}read',
             'principal' => $this->calendarInfo['principaluri'],
             'protected' => true,
-        );
-        if (!$this->calendarInfo['{http://sabredav.org/ns}read-only']) {
-            $acl[] = array(
+        ];
+        if ($this->calendarInfo['{http://sabredav.org/ns}read-only']) {
+            $acl[] = [
+                'privilege' => '{DAV:}write-properties',
+                'principal' => $this->calendarInfo['principaluri'],
+                'protected' => true,
+            ];
+        } else {
+            $acl[] = [
                 'privilege' => '{DAV:}write',
                 'principal' => $this->calendarInfo['principaluri'],
                 'protected' => true,
-            );
+            ];
         }
         return $acl;
 
     }
 
+    /**
+     * This method returns the ACL's for calendar objects in this calendar.
+     * The result of this method automatically gets passed to the
+     * calendar-object nodes in the calendar.
+     *
+     * @return array
+     */
+    function getChildACL() {
+
+        $acl = parent::getChildACL();
+        $acl[] = [
+            'privilege' => '{DAV:}read',
+            'principal' => $this->calendarInfo['principaluri'],
+            'protected' => true,
+        ];
+
+        if (!$this->calendarInfo['{http://sabredav.org/ns}read-only']) {
+            $acl[] = [
+                'privilege' => '{DAV:}write',
+                'principal' => $this->calendarInfo['principaluri'],
+                'protected' => true,
+            ];
+        }
+        return $acl;
+
+    }
+
+
     /**
      * Returns the list of people whom this calendar is shared with.
      *
@@ -107,7 +139,7 @@ class SharedCalendar extends Calendar implements ISharedCalendar {
      *
      * @return array
      */
-    public function getShares() {
+    function getShares() {
 
         return $this->caldavBackend->getShares($this->calendarInfo['id']);
 

vendor/sabre/dav/lib/CalDAV/SharingPlugin.php

@@ -0,0 +1,426 @@
+<?php
+
+namespace Sabre\CalDAV;
+
+use Sabre\DAV;
+use Sabre\DAV\Xml\Property\Href;
+use Sabre\HTTP\RequestInterface;
+use Sabre\HTTP\ResponseInterface;
+
+/**
+ * This plugin implements support for caldav sharing.
+ *
+ * This spec is defined at:
+ * http://svn.calendarserver.org/repository/calendarserver/CalendarServer/trunk/doc/Extensions/caldav-sharing.txt
+ *
+ * See:
+ * Sabre\CalDAV\Backend\SharingSupport for all the documentation.
+ *
+ * Note: This feature is experimental, and may change in between different
+ * SabreDAV versions.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class SharingPlugin extends DAV\ServerPlugin {
+
+    /**
+     * These are the various status constants used by sharing-messages.
+     */
+    const STATUS_ACCEPTED = 1;
+    const STATUS_DECLINED = 2;
+    const STATUS_DELETED = 3;
+    const STATUS_NORESPONSE = 4;
+    const STATUS_INVALID = 5;
+
+    /**
+     * Reference to SabreDAV server object.
+     *
+     * @var Sabre\DAV\Server
+     */
+    protected $server;
+
+    /**
+     * This method should return a list of server-features.
+     *
+     * This is for example 'versioning' and is added to the DAV: header
+     * in an OPTIONS response.
+     *
+     * @return array
+     */
+    function getFeatures() {
+
+        return ['calendarserver-sharing'];
+
+    }
+
+    /**
+     * Returns a plugin name.
+     *
+     * Using this name other plugins will be able to access other plugins
+     * using Sabre\DAV\Server::getPlugin
+     *
+     * @return string
+     */
+    function getPluginName() {
+
+        return 'caldav-sharing';
+
+    }
+
+    /**
+     * This initializes the plugin.
+     *
+     * This function is called by Sabre\DAV\Server, after
+     * addPlugin is called.
+     *
+     * This method should set up the required event subscriptions.
+     *
+     * @param DAV\Server $server
+     * @return void
+     */
+    function initialize(DAV\Server $server) {
+
+        $this->server = $server;
+        $server->resourceTypeMapping['Sabre\\CalDAV\\ISharedCalendar'] = '{' . Plugin::NS_CALENDARSERVER . '}shared';
+
+        array_push(
+            $this->server->protectedProperties,
+            '{' . Plugin::NS_CALENDARSERVER . '}invite',
+            '{' . Plugin::NS_CALENDARSERVER . '}allowed-sharing-modes',
+            '{' . Plugin::NS_CALENDARSERVER . '}shared-url'
+        );
+
+        $this->server->xml->elementMap['{' . Plugin::NS_CALENDARSERVER . '}share'] = 'Sabre\\CalDAV\\Xml\\Request\\Share';
+        $this->server->xml->elementMap['{' . Plugin::NS_CALENDARSERVER . '}invite-reply'] = 'Sabre\\CalDAV\\Xml\\Request\\InviteReply';
+
+        $this->server->on('propFind',     [$this, 'propFindEarly']);
+        $this->server->on('propFind',     [$this, 'propFindLate'], 150);
+        $this->server->on('propPatch',    [$this, 'propPatch'], 40);
+        $this->server->on('method:POST',  [$this, 'httpPost']);
+
+    }
+
+    /**
+     * This event is triggered when properties are requested for a certain
+     * node.
+     *
+     * This allows us to inject any properties early.
+     *
+     * @param DAV\PropFind $propFind
+     * @param DAV\INode $node
+     * @return void
+     */
+    function propFindEarly(DAV\PropFind $propFind, DAV\INode $node) {
+
+        if ($node instanceof IShareableCalendar) {
+
+            $propFind->handle('{' . Plugin::NS_CALENDARSERVER . '}invite', function() use ($node) {
+                return new Xml\Property\Invite(
+                    $node->getShares()
+                );
+            });
+
+        }
+
+        if ($node instanceof ISharedCalendar) {
+
+            $propFind->handle('{' . Plugin::NS_CALENDARSERVER . '}shared-url', function() use ($node) {
+                return new Href(
+                    $node->getSharedUrl()
+                );
+            });
+
+            $propFind->handle('{' . Plugin::NS_CALENDARSERVER . '}invite', function() use ($node) {
+
+                // Fetching owner information
+                $props = $this->server->getPropertiesForPath($node->getOwner(), [
+                    '{http://sabredav.org/ns}email-address',
+                    '{DAV:}displayname',
+                ], 0);
+
+                $ownerInfo = [
+                    'href' => $node->getOwner(),
+                ];
+
+                if (isset($props[0][200])) {
+
+                    // We're mapping the internal webdav properties to the
+                    // elements caldav-sharing expects.
+                    if (isset($props[0][200]['{http://sabredav.org/ns}email-address'])) {
+                        $ownerInfo['href'] = 'mailto:' . $props[0][200]['{http://sabredav.org/ns}email-address'];
+                    }
+                    if (isset($props[0][200]['{DAV:}displayname'])) {
+                        $ownerInfo['commonName'] = $props[0][200]['{DAV:}displayname'];
+                    }
+
+                }
+
+                return new Xml\Property\Invite(
+                    $node->getShares(),
+                    $ownerInfo
+                );
+
+            });
+
+        }
+
+    }
+
+    /**
+     * This method is triggered *after* all properties have been retrieved.
+     * This allows us to inject the correct resourcetype for calendars that
+     * have been shared.
+     *
+     * @param DAV\PropFind $propFind
+     * @param DAV\INode $node
+     * @return void
+     */
+    function propFindLate(DAV\PropFind $propFind, DAV\INode $node) {
+
+        if ($node instanceof IShareableCalendar) {
+            if ($rt = $propFind->get('{DAV:}resourcetype')) {
+                if (count($node->getShares()) > 0) {
+                    $rt->add('{' . Plugin::NS_CALENDARSERVER . '}shared-owner');
+                }
+            }
+            $propFind->handle('{' . Plugin::NS_CALENDARSERVER . '}allowed-sharing-modes', function() {
+                return new Xml\Property\AllowedSharingModes(true, false);
+            });
+
+        }
+
+    }
+
+    /**
+     * This method is trigged when a user attempts to update a node's
+     * properties.
+     *
+     * A previous draft of the sharing spec stated that it was possible to use
+     * PROPPATCH to remove 'shared-owner' from the resourcetype, thus unsharing
+     * the calendar.
+     *
+     * Even though this is no longer in the current spec, we keep this around
+     * because OS X 10.7 may still make use of this feature.
+     *
+     * @param string $path
+     * @param DAV\PropPatch $propPatch
+     * @return void
+     */
+    function propPatch($path, DAV\PropPatch $propPatch) {
+
+        $node = $this->server->tree->getNodeForPath($path);
+        if (!$node instanceof IShareableCalendar)
+            return;
+
+        $propPatch->handle('{DAV:}resourcetype', function($value) use ($node) {
+            if ($value->is('{' . Plugin::NS_CALENDARSERVER . '}shared-owner')) return false;
+            $shares = $node->getShares();
+            $remove = [];
+            foreach ($shares as $share) {
+                $remove[] = $share['href'];
+            }
+            $node->updateShares([], $remove);
+
+            return true;
+
+        });
+
+    }
+
+    /**
+     * We intercept this to handle POST requests on calendars.
+     *
+     * @param RequestInterface $request
+     * @param ResponseInterface $response
+     * @return null|bool
+     */
+    function httpPost(RequestInterface $request, ResponseInterface $response) {
+
+        $path = $request->getPath();
+
+        // Only handling xml
+        $contentType = $request->getHeader('Content-Type');
+        if (strpos($contentType, 'application/xml') === false && strpos($contentType, 'text/xml') === false)
+            return;
+
+        // Making sure the node exists
+        try {
+            $node = $this->server->tree->getNodeForPath($path);
+        } catch (DAV\Exception\NotFound $e) {
+            return;
+        }
+
+        $requestBody = $request->getBodyAsString();
+
+        // If this request handler could not deal with this POST request, it
+        // will return 'null' and other plugins get a chance to handle the
+        // request.
+        //
+        // However, we already requested the full body. This is a problem,
+        // because a body can only be read once. This is why we preemptively
+        // re-populated the request body with the existing data.
+        $request->setBody($requestBody);
+
+        $message = $this->server->xml->parse($requestBody, $request->getUrl(), $documentType);
+
+        switch ($documentType) {
+
+            // Dealing with the 'share' document, which modified invitees on a
+            // calendar.
+            case '{' . Plugin::NS_CALENDARSERVER . '}share' :
+
+                // We can only deal with IShareableCalendar objects
+                if (!$node instanceof IShareableCalendar) {
+                    return;
+                }
+
+                $this->server->transactionType = 'post-calendar-share';
+
+                // Getting ACL info
+                $acl = $this->server->getPlugin('acl');
+
+                // If there's no ACL support, we allow everything
+                if ($acl) {
+                    $acl->checkPrivileges($path, '{DAV:}write');
+                }
+
+                $node->updateShares($message->set, $message->remove);
+
+                $response->setStatus(200);
+                // Adding this because sending a response body may cause issues,
+                // and I wanted some type of indicator the response was handled.
+                $response->setHeader('X-Sabre-Status', 'everything-went-well');
+
+                // Breaking the event chain
+                return false;
+
+            // The invite-reply document is sent when the user replies to an
+            // invitation of a calendar share.
+            case '{' . Plugin::NS_CALENDARSERVER . '}invite-reply' :
+
+                // This only works on the calendar-home-root node.
+                if (!$node instanceof CalendarHome) {
+                    return;
+                }
+                $this->server->transactionType = 'post-invite-reply';
+
+                // Getting ACL info
+                $acl = $this->server->getPlugin('acl');
+
+                // If there's no ACL support, we allow everything
+                if ($acl) {
+                    $acl->checkPrivileges($path, '{DAV:}write');
+                }
+
+                $url = $node->shareReply(
+                    $message->href,
+                    $message->status,
+                    $message->calendarUri,
+                    $message->inReplyTo,
+                    $message->summary
+                );
+
+                $response->setStatus(200);
+                // Adding this because sending a response body may cause issues,
+                // and I wanted some type of indicator the response was handled.
+                $response->setHeader('X-Sabre-Status', 'everything-went-well');
+
+                if ($url) {
+                    $writer = $this->server->xml->getWriter($this->server->getBaseUri());
+                    $writer->openMemory();
+                    $writer->startDocument();
+                    $writer->startElement('{' . Plugin::NS_CALENDARSERVER . '}shared-as');
+                    $writer->write(new Href($url));
+                    $writer->endElement();
+                    $response->setHeader('Content-Type', 'application/xml');
+                    $response->setBody($writer->outputMemory());
+
+                }
+
+                // Breaking the event chain
+                return false;
+
+            case '{' . Plugin::NS_CALENDARSERVER . '}publish-calendar' :
+
+                // We can only deal with IShareableCalendar objects
+                if (!$node instanceof IShareableCalendar) {
+                    return;
+                }
+                $this->server->transactionType = 'post-publish-calendar';
+
+                // Getting ACL info
+                $acl = $this->server->getPlugin('acl');
+
+                // If there's no ACL support, we allow everything
+                if ($acl) {
+                    $acl->checkPrivileges($path, '{DAV:}write');
+                }
+
+                $node->setPublishStatus(true);
+
+                // iCloud sends back the 202, so we will too.
+                $response->setStatus(202);
+
+                // Adding this because sending a response body may cause issues,
+                // and I wanted some type of indicator the response was handled.
+                $response->setHeader('X-Sabre-Status', 'everything-went-well');
+
+                // Breaking the event chain
+                return false;
+
+            case '{' . Plugin::NS_CALENDARSERVER . '}unpublish-calendar' :
+
+                // We can only deal with IShareableCalendar objects
+                if (!$node instanceof IShareableCalendar) {
+                    return;
+                }
+                $this->server->transactionType = 'post-unpublish-calendar';
+
+                // Getting ACL info
+                $acl = $this->server->getPlugin('acl');
+
+                // If there's no ACL support, we allow everything
+                if ($acl) {
+                    $acl->checkPrivileges($path, '{DAV:}write');
+                }
+
+                $node->setPublishStatus(false);
+
+                $response->setStatus(200);
+
+                // Adding this because sending a response body may cause issues,
+                // and I wanted some type of indicator the response was handled.
+                $response->setHeader('X-Sabre-Status', 'everything-went-well');
+
+                // Breaking the event chain
+                return false;
+
+        }
+
+
+
+    }
+
+    /**
+     * Returns a bunch of meta-data about the plugin.
+     *
+     * Providing this information is optional, and is mainly displayed by the
+     * Browser plugin.
+     *
+     * The description key in the returned array may contain html and will not
+     * be sanitized.
+     *
+     * @return array
+     */
+    function getPluginInfo() {
+
+        return [
+            'name'        => $this->getPluginName(),
+            'description' => 'Adds support for caldav-sharing.',
+            'link'        => 'http://sabre.io/dav/caldav-sharing/',
+        ];
+
+    }
+}

vendor/sabre/dav/lib/CalDAV/Subscriptions/ISubscription.php

@@ -0,0 +1,40 @@
+<?php
+
+namespace Sabre\CalDAV\Subscriptions;
+
+use Sabre\DAV\ICollection;
+use Sabre\DAV\IProperties;
+
+/**
+ * ISubscription
+ *
+ * Nodes implementing this interface represent calendar subscriptions.
+ *
+ * The subscription node doesn't do much, other than returning and updating
+ * subscription-related properties.
+ *
+ * The following properties should be supported:
+ *
+ * 1. {DAV:}displayname
+ * 2. {http://apple.com/ns/ical/}refreshrate
+ * 3. {http://calendarserver.org/ns/}subscribed-strip-todos (omit if todos
+ *    should not be stripped).
+ * 4. {http://calendarserver.org/ns/}subscribed-strip-alarms (omit if alarms
+ *    should not be stripped).
+ * 5. {http://calendarserver.org/ns/}subscribed-strip-attachments (omit if
+ *    attachments should not be stripped).
+ * 6. {http://calendarserver.org/ns/}source (Must be a
+ *     Sabre\DAV\Property\Href).
+ * 7. {http://apple.com/ns/ical/}calendar-color
+ * 8. {http://apple.com/ns/ical/}calendar-order
+ *
+ * It is recommended to support every property.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+interface ISubscription extends ICollection, IProperties {
+
+
+}

vendor/sabre/dav/lib/CalDAV/Subscriptions/Plugin.php

@@ -0,0 +1,120 @@
+<?php
+
+namespace Sabre\CalDAV\Subscriptions;
+
+use Sabre\DAV\INode;
+use Sabre\DAV\PropFind;
+use Sabre\DAV\ServerPlugin;
+use Sabre\DAV\Server;
+
+/**
+ * This plugin adds calendar-subscription support to your CalDAV server.
+ *
+ * Some clients support 'managed subscriptions' server-side. This is basically
+ * a list of subscription urls a user is using.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class Plugin extends ServerPlugin {
+
+    /**
+     * This initializes the plugin.
+     *
+     * This function is called by Sabre\DAV\Server, after
+     * addPlugin is called.
+     *
+     * This method should set up the required event subscriptions.
+     *
+     * @param Server $server
+     * @return void
+     */
+    function initialize(Server $server) {
+
+        $server->resourceTypeMapping['Sabre\\CalDAV\\Subscriptions\\ISubscription'] =
+            '{http://calendarserver.org/ns/}subscribed';
+
+        $server->xml->elementMap['{http://calendarserver.org/ns/}source'] =
+            'Sabre\\DAV\\Xml\\Property\\Href';
+
+        $server->on('propFind', [$this, 'propFind'], 150);
+
+    }
+
+    /**
+     * This method should return a list of server-features.
+     *
+     * This is for example 'versioning' and is added to the DAV: header
+     * in an OPTIONS response.
+     *
+     * @return array
+     */
+    function getFeatures() {
+
+        return ['calendarserver-subscribed'];
+
+    }
+
+    /**
+     * Triggered after properties have been fetched.
+     *
+     * @param PropFind $propFind
+     * @param INode $node
+     * @return void
+     */
+    function propFind(PropFind $propFind, INode $node) {
+
+        // There's a bunch of properties that must appear as a self-closing
+        // xml-element. This event handler ensures that this will be the case.
+        $props = [
+            '{http://calendarserver.org/ns/}subscribed-strip-alarms',
+            '{http://calendarserver.org/ns/}subscribed-strip-attachments',
+            '{http://calendarserver.org/ns/}subscribed-strip-todos',
+        ];
+
+        foreach ($props as $prop) {
+
+            if ($propFind->getStatus($prop) === 200) {
+                $propFind->set($prop, '', 200);
+            }
+
+        }
+
+    }
+
+    /**
+     * Returns a plugin name.
+     *
+     * Using this name other plugins will be able to access other plugins
+     * using \Sabre\DAV\Server::getPlugin
+     *
+     * @return string
+     */
+    function getPluginName() {
+
+        return 'subscriptions';
+
+    }
+
+    /**
+     * Returns a bunch of meta-data about the plugin.
+     *
+     * Providing this information is optional, and is mainly displayed by the
+     * Browser plugin.
+     *
+     * The description key in the returned array may contain html and will not
+     * be sanitized.
+     *
+     * @return array
+     */
+    function getPluginInfo() {
+
+        return [
+            'name'        => $this->getPluginName(),
+            'description' => 'This plugin allows users to store iCalendar subscriptions in their calendar-home.',
+            'link'        => null,
+        ];
+
+    }
+}

vendor/sabre/dav/lib/CalDAV/Subscriptions/Subscription.php

@@ -0,0 +1,274 @@
+<?php
+
+namespace Sabre\CalDAV\Subscriptions;
+
+use Sabre\DAV\Collection;
+use Sabre\DAV\Xml\Property\Href;
+use Sabre\DAV\PropPatch;
+use Sabre\DAV\Exception\MethodNotAllowed;
+use Sabre\DAVACL\IACL;
+use Sabre\CalDAV\Backend\SubscriptionSupport;
+
+/**
+ * Subscription Node
+ *
+ * This node represents a subscription.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class Subscription extends Collection implements ISubscription, IACL {
+
+    /**
+     * caldavBackend
+     *
+     * @var SupportsSubscriptions
+     */
+    protected $caldavBackend;
+
+    /**
+     * subscriptionInfo
+     *
+     * @var array
+     */
+    protected $subscriptionInfo;
+
+    /**
+     * Constructor
+     *
+     * @param SubscriptionSupport $caldavBackend
+     * @param array $calendarInfo
+     */
+    function __construct(SubscriptionSupport $caldavBackend, array $subscriptionInfo) {
+
+        $this->caldavBackend = $caldavBackend;
+        $this->subscriptionInfo = $subscriptionInfo;
+
+        $required = [
+            'id',
+            'uri',
+            'principaluri',
+            'source',
+            ];
+
+        foreach ($required as $r) {
+            if (!isset($subscriptionInfo[$r])) {
+                throw new \InvalidArgumentException('The ' . $r . ' field is required when creating a subscription node');
+            }
+        }
+
+    }
+
+    /**
+     * Returns the name of the node.
+     *
+     * This is used to generate the url.
+     *
+     * @return string
+     */
+    function getName() {
+
+        return $this->subscriptionInfo['uri'];
+
+    }
+
+    /**
+     * Returns the last modification time
+     *
+     * @return int
+     */
+    function getLastModified() {
+
+        if (isset($this->subscriptionInfo['lastmodified'])) {
+            return $this->subscriptionInfo['lastmodified'];
+        }
+
+    }
+
+    /**
+     * Deletes the current node
+     *
+     * @return void
+     */
+    function delete() {
+
+        $this->caldavBackend->deleteSubscription(
+            $this->subscriptionInfo['id']
+        );
+
+    }
+
+    /**
+     * Returns an array with all the child nodes
+     *
+     * @return DAV\INode[]
+     */
+    function getChildren() {
+
+        return [];
+
+    }
+
+    /**
+     * Updates properties on this node.
+     *
+     * This method received a PropPatch object, which contains all the
+     * information about the update.
+     *
+     * To update specific properties, call the 'handle' method on this object.
+     * Read the PropPatch documentation for more information.
+     *
+     * @param PropPatch $propPatch
+     * @return void
+     */
+    function propPatch(PropPatch $propPatch) {
+
+        return $this->caldavBackend->updateSubscription(
+            $this->subscriptionInfo['id'],
+            $propPatch
+        );
+
+    }
+
+    /**
+     * Returns a list of properties for this nodes.
+     *
+     * The properties list is a list of propertynames the client requested,
+     * encoded in clark-notation {xmlnamespace}tagname.
+     *
+     * If the array is empty, it means 'all properties' were requested.
+     *
+     * Note that it's fine to liberally give properties back, instead of
+     * conforming to the list of requested properties.
+     * The Server class will filter out the extra.
+     *
+     * @param array $properties
+     * @return void
+     */
+    function getProperties($properties) {
+
+        $r = [];
+
+        foreach ($properties as $prop) {
+
+            switch ($prop) {
+                case '{http://calendarserver.org/ns/}source' :
+                    $r[$prop] = new Href($this->subscriptionInfo['source'], false);
+                    break;
+                default :
+                    if (array_key_exists($prop, $this->subscriptionInfo)) {
+                        $r[$prop] = $this->subscriptionInfo[$prop];
+                    }
+                    break;
+            }
+
+        }
+
+        return $r;
+
+    }
+
+    /**
+     * Returns the owner principal.
+     *
+     * This must be a url to a principal, or null if there's no owner
+     *
+     * @return string|null
+     */
+    function getOwner() {
+
+        return $this->subscriptionInfo['principaluri'];
+
+    }
+
+    /**
+     * Returns a group principal.
+     *
+     * This must be a url to a principal, or null if there's no owner
+     *
+     * @return string|null
+     */
+    function getGroup() {
+
+        return null;
+
+    }
+
+    /**
+     * Returns a list of ACE's for this node.
+     *
+     * Each ACE has the following properties:
+     *   * 'privilege', a string such as {DAV:}read or {DAV:}write. These are
+     *     currently the only supported privileges
+     *   * 'principal', a url to the principal who owns the node
+     *   * 'protected' (optional), indicating that this ACE is not allowed to
+     *      be updated.
+     *
+     * @return array
+     */
+    function getACL() {
+
+        return [
+            [
+                'privilege' => '{DAV:}read',
+                'principal' => $this->getOwner(),
+                'protected' => true,
+            ],
+            [
+                'privilege' => '{DAV:}write',
+                'principal' => $this->getOwner(),
+                'protected' => true,
+            ],
+            [
+                'privilege' => '{DAV:}read',
+                'principal' => $this->getOwner() . '/calendar-proxy-write',
+                'protected' => true,
+            ],
+            [
+                'privilege' => '{DAV:}write',
+                'principal' => $this->getOwner() . '/calendar-proxy-write',
+                'protected' => true,
+            ],
+            [
+                'privilege' => '{DAV:}read',
+                'principal' => $this->getOwner() . '/calendar-proxy-read',
+                'protected' => true,
+            ]
+        ];
+
+    }
+
+    /**
+     * Updates the ACL.
+     *
+     * This method will receive a list of new ACE's.
+     *
+     * @param array $acl
+     * @return void
+     */
+    function setACL(array $acl) {
+
+        throw new MethodNotAllowed('Changing ACL is not yet supported');
+
+    }
+
+    /**
+     * Returns the list of supported privileges for this node.
+     *
+     * The returned data structure is a list of nested privileges.
+     * See \Sabre\DAVACL\Plugin::getDefaultSupportedPrivilegeSet for a simple
+     * standard structure.
+     *
+     * If null is returned from this method, the default privilege set is used,
+     * which is fine for most common usecases.
+     *
+     * @return array|null
+     */
+    function getSupportedPrivilegeSet() {
+
+        return null;
+
+    }
+
+}