streams/Zotlabs/Module/Cloud.php

<?php
namespace Zotlabs\Module;
/**
 * @file Zotlabs/Module/Cloud.php
 * @brief Initialize Hubzilla's cloud (SabreDAV).
 *
 * Module for accessing the DAV storage area.
 */

use App;
use Sabre\DAV as SDAV;
use Zotlabs\Storage;
use Zotlabs\Lib\Libprofile;
use Zotlabs\Web\Controller;
use Zotlabs\Storage\BasicAuth;
use Zotlabs\Storage\Directory;

// composer autoloader for SabreDAV
require_once('vendor/autoload.php');
require_once('include/attach.php');

/**
 * @brief Cloud Module.
 *
 */

class Cloud extends Controller {

	/**
	 * @brief Fires up the SabreDAV server.
	 *
	 */
	function init() {

		if (! is_dir('store')) {
			os_mkdir('store', STORAGE_DEFAULT_PERMISSIONS, false);
		}
		
		$which = null;
		if (argc() > 1) {
			$which = argv(1);
		}
		$profile = 0;

		if ($which) {
			Libprofile::load( $which, $profile);
		}


		$auth = new BasicAuth();

		$ob_hash = get_observer_hash();

		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;
		}

		// if we arrived at this path with any query parameters in the url, build a clean url without
		// them and redirect.

		if (! array_key_exists('cloud_sort',$_SESSION)) {
			$_SESSION['cloud_sort'] = 'name';
		}

		$_SESSION['cloud_sort'] = (($_REQUEST['sort']) ? trim(notags($_REQUEST['sort'])) : $_SESSION['cloud_sort']);

		$x = clean_query_string();
		if ($x !== App::$query_string) {
			goaway(z_root() . '/' . $x);
		}

		$rootDirectory = new Directory('/', $auth);

		// A SabreDAV server-object
		$server = new SDAV\Server($rootDirectory);
		// prevent overwriting changes each other with a lock backend
		$lockBackend = new SDAV\Locks\Backend\File('cache/locks');
		$lockPlugin = new SDAV\Locks\Plugin($lockBackend);

		$server->addPlugin($lockPlugin);

		$is_readable = false;

		// provide a directory view for the cloud in Hubzilla
		$browser = new \Zotlabs\Storage\Browser($auth);
		$auth->setBrowserPlugin($browser);

		$server->addPlugin($browser);

		// Experimental QuotaPlugin
		//	require_once('\Zotlabs\Storage/QuotaPlugin.php');
		//	$server->addPlugin(new \Zotlabs\Storage\\QuotaPlugin($auth));


		// over-ride the default XML output on thrown exceptions

		$server->on('exception', [ $this, 'DAVException' ]);

		// All we need to do now, is to fire up the server

		$server->exec();

		if ($browser->build_page) {
			construct_page();
		}
		
		killme();
	}


	function DAVException($err) {
			
		if ($err instanceof \Sabre\DAV\Exception\NotFound) {
			notice( t('Not found') . EOL);
		}
		elseif ($err instanceof \Sabre\DAV\Exception\Forbidden) {
			notice( t('Permission denied') . EOL);
		}
		elseif ($err instanceof \Sabre\DAV\Exception\NotImplemented) {
			notice( t('Please refresh page') . EOL);
		}
		else {
			notice( t('Unknown error') . EOL);
		}

		construct_page();
			
		killme();
	}

}