mirror of
https://git.friendi.ca/friendica/friendica-addons.git
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664 lines
24 KiB
PHP
664 lines
24 KiB
PHP
<?php
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use Sabre\VObject;
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/**
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* PDO CalDAV backend
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*
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* This backend is used to store calendar-data in a PDO database, such as
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* sqlite or MySQL
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*
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* @package Sabre
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* @subpackage CalDAV
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* @copyright Copyright (C) 2007-2012 Rooftop Solutions. All rights reserved.
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* @author Evert Pot (http://www.rooftopsolutions.nl/)
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* @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
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*/
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class Sabre_CalDAV_Backend_PDO extends Sabre_CalDAV_Backend_Abstract {
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/**
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* We need to specify a max date, because we need to stop *somewhere*
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*
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* On 32 bit system the maximum for a signed integer is 2147483647, so
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* MAX_DATE cannot be higher than date('Y-m-d', 2147483647) which results
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* in 2038-01-19 to avoid problems when the date is converted
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* to a unix timestamp.
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*/
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const MAX_DATE = '2038-01-01';
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/**
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* pdo
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*
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* @var PDO
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*/
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protected $pdo;
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/**
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* The table name that will be used for calendars
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*
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* @var string
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*/
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protected $calendarTableName;
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/**
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* The table name that will be used for calendar objects
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*
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* @var string
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*/
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protected $calendarObjectTableName;
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/**
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* List of CalDAV properties, and how they map to database fieldnames
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*
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* Add your own properties by simply adding on to this array
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*
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* @var array
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*/
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public $propertyMap = array(
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'{DAV:}displayname' => 'displayname',
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'{urn:ietf:params:xml:ns:caldav}calendar-description' => 'description',
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'{urn:ietf:params:xml:ns:caldav}calendar-timezone' => 'timezone',
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'{http://apple.com/ns/ical/}calendar-order' => 'calendarorder',
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'{http://apple.com/ns/ical/}calendar-color' => 'calendarcolor',
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);
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/**
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* Creates the backend
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*
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* @param PDO $pdo
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* @param string $calendarTableName
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* @param string $calendarObjectTableName
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*/
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public function __construct(PDO $pdo, $calendarTableName = 'calendars', $calendarObjectTableName = 'calendarobjects') {
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$this->pdo = $pdo;
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$this->calendarTableName = $calendarTableName;
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$this->calendarObjectTableName = $calendarObjectTableName;
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}
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/**
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* Returns a list of calendars for a principal.
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*
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* Every project is an array with the following keys:
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* * id, a unique id that will be used by other functions to modify the
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* calendar. This can be the same as the uri or a database key.
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* * uri, which the basename of the uri with which the calendar is
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* accessed.
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* * principaluri. The owner of the calendar. Almost always the same as
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* principalUri passed to this method.
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*
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* Furthermore it can contain webdav properties in clark notation. A very
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* common one is '{DAV:}displayname'.
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*
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* @param string $principalUri
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* @return array
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*/
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public function getCalendarsForUser($principalUri) {
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$fields = array_values($this->propertyMap);
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$fields[] = 'id';
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$fields[] = 'uri';
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$fields[] = 'ctag';
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$fields[] = 'components';
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$fields[] = 'principaluri';
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// Making fields a comma-delimited list
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$fields = implode(', ', $fields);
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$stmt = $this->pdo->prepare("SELECT " . $fields . " FROM ".$this->calendarTableName." WHERE principaluri = ? ORDER BY calendarorder ASC");
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$stmt->execute(array($principalUri));
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$calendars = array();
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while($row = $stmt->fetch(PDO::FETCH_ASSOC)) {
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$components = array();
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if ($row['components']) {
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$components = explode(',',$row['components']);
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}
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$calendar = array(
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'id' => $row['id'],
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'uri' => $row['uri'],
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'principaluri' => $row['principaluri'],
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'{' . Sabre_CalDAV_Plugin::NS_CALENDARSERVER . '}getctag' => $row['ctag']?$row['ctag']:'0',
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'{' . Sabre_CalDAV_Plugin::NS_CALDAV . '}supported-calendar-component-set' => new Sabre_CalDAV_Property_SupportedCalendarComponentSet($components),
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);
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foreach($this->propertyMap as $xmlName=>$dbName) {
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$calendar[$xmlName] = $row[$dbName];
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}
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$calendars[] = $calendar;
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}
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return $calendars;
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}
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/**
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* Creates a new calendar for a principal.
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*
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* If the creation was a success, an id must be returned that can be used to reference
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* this calendar in other methods, such as updateCalendar
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*
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* @param string $principalUri
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* @param string $calendarUri
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* @param array $properties
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* @return string
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*/
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public function createCalendar($principalUri, $calendarUri, array $properties) {
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$fieldNames = array(
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'principaluri',
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'uri',
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'ctag',
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);
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$values = array(
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':principaluri' => $principalUri,
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':uri' => $calendarUri,
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':ctag' => 1,
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);
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// Default value
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$sccs = '{urn:ietf:params:xml:ns:caldav}supported-calendar-component-set';
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$fieldNames[] = 'components';
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if (!isset($properties[$sccs])) {
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$values[':components'] = 'VEVENT,VTODO';
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} else {
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if (!($properties[$sccs] instanceof Sabre_CalDAV_Property_SupportedCalendarComponentSet)) {
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throw new Sabre_DAV_Exception('The ' . $sccs . ' property must be of type: Sabre_CalDAV_Property_SupportedCalendarComponentSet');
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}
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$values[':components'] = implode(',',$properties[$sccs]->getValue());
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}
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foreach($this->propertyMap as $xmlName=>$dbName) {
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if (isset($properties[$xmlName])) {
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$values[':' . $dbName] = $properties[$xmlName];
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$fieldNames[] = $dbName;
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}
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}
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$stmt = $this->pdo->prepare("INSERT INTO ".$this->calendarTableName." (".implode(', ', $fieldNames).") VALUES (".implode(', ',array_keys($values)).")");
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$stmt->execute($values);
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return $this->pdo->lastInsertId();
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}
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/**
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* Updates properties for a calendar.
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*
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* The mutations array uses the propertyName in clark-notation as key,
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* and the array value for the property value. In the case a property
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* should be deleted, the property value will be null.
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*
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* This method must be atomic. If one property cannot be changed, the
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* entire operation must fail.
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*
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* If the operation was successful, true can be returned.
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* If the operation failed, false can be returned.
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*
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* Deletion of a non-existent property is always successful.
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*
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* Lastly, it is optional to return detailed information about any
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* failures. In this case an array should be returned with the following
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* structure:
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*
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* array(
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* 403 => array(
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* '{DAV:}displayname' => null,
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* ),
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* 424 => array(
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* '{DAV:}owner' => null,
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* )
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* )
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*
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* In this example it was forbidden to update {DAV:}displayname.
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* (403 Forbidden), which in turn also caused {DAV:}owner to fail
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* (424 Failed Dependency) because the request needs to be atomic.
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*
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* @param string $calendarId
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* @param array $mutations
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* @return bool|array
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*/
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public function updateCalendar($calendarId, array $mutations) {
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$newValues = array();
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$result = array(
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200 => array(), // Ok
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403 => array(), // Forbidden
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424 => array(), // Failed Dependency
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);
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$hasError = false;
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foreach($mutations as $propertyName=>$propertyValue) {
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// We don't know about this property.
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if (!isset($this->propertyMap[$propertyName])) {
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$hasError = true;
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$result[403][$propertyName] = null;
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unset($mutations[$propertyName]);
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continue;
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}
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$fieldName = $this->propertyMap[$propertyName];
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$newValues[$fieldName] = $propertyValue;
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}
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// If there were any errors we need to fail the request
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if ($hasError) {
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// Properties has the remaining properties
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foreach($mutations as $propertyName=>$propertyValue) {
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$result[424][$propertyName] = null;
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}
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// Removing unused statuscodes for cleanliness
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foreach($result as $status=>$properties) {
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if (is_array($properties) && count($properties)===0) unset($result[$status]);
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}
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return $result;
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}
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// Success
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// Now we're generating the sql query.
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$valuesSql = array();
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foreach($newValues as $fieldName=>$value) {
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$valuesSql[] = $fieldName . ' = ?';
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}
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$valuesSql[] = 'ctag = ctag + 1';
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$stmt = $this->pdo->prepare("UPDATE " . $this->calendarTableName . " SET " . implode(', ',$valuesSql) . " WHERE id = ?");
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$newValues['id'] = $calendarId;
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$stmt->execute(array_values($newValues));
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return true;
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}
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/**
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* Delete a calendar and all it's objects
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*
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* @param string $calendarId
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* @return void
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*/
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public function deleteCalendar($calendarId) {
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$stmt = $this->pdo->prepare('DELETE FROM '.$this->calendarObjectTableName.' WHERE calendarid = ?');
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$stmt->execute(array($calendarId));
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$stmt = $this->pdo->prepare('DELETE FROM '.$this->calendarTableName.' WHERE id = ?');
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$stmt->execute(array($calendarId));
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}
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/**
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* Returns all calendar objects within a calendar.
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*
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* Every item contains an array with the following keys:
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* * id - unique identifier which will be used for subsequent updates
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* * calendardata - The iCalendar-compatible calendar data
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* * uri - a unique key which will be used to construct the uri. This can be any arbitrary string.
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* * lastmodified - a timestamp of the last modification time
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* * etag - An arbitrary string, surrounded by double-quotes. (e.g.:
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* ' "abcdef"')
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* * calendarid - The calendarid as it was passed to this function.
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* * size - The size of the calendar objects, in bytes.
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*
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* Note that the etag is optional, but it's highly encouraged to return for
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* speed reasons.
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*
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* The calendardata is also optional. If it's not returned
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* 'getCalendarObject' will be called later, which *is* expected to return
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* calendardata.
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*
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* If neither etag or size are specified, the calendardata will be
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* used/fetched to determine these numbers. If both are specified the
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* amount of times this is needed is reduced by a great degree.
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*
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* @param string $calendarId
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* @return array
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*/
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public function getCalendarObjects($calendarId) {
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$stmt = $this->pdo->prepare('SELECT id, uri, lastmodified, etag, calendarid, size FROM '.$this->calendarObjectTableName.' WHERE calendarid = ?');
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$stmt->execute(array($calendarId));
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$result = array();
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foreach($stmt->fetchAll(\PDO::FETCH_ASSOC) as $row) {
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$result[] = array(
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'id' => $row['id'],
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'uri' => $row['uri'],
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'lastmodified' => $row['lastmodified'],
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'etag' => '"' . $row['etag'] . '"',
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'calendarid' => $row['calendarid'],
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'size' => (int)$row['size'],
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);
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}
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return $result;
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}
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/**
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* Returns information from a single calendar object, based on it's object
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* uri.
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*
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* The returned array must have the same keys as getCalendarObjects. The
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* 'calendardata' object is required here though, while it's not required
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* for getCalendarObjects.
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*
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* @param string $calendarId
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* @param string $objectUri
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* @return array
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*/
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public function getCalendarObject($calendarId,$objectUri) {
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$stmt = $this->pdo->prepare('SELECT id, uri, lastmodified, etag, calendarid, size, calendardata FROM '.$this->calendarObjectTableName.' WHERE calendarid = ? AND uri = ?');
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$stmt->execute(array($calendarId, $objectUri));
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$row = $stmt->fetch(\PDO::FETCH_ASSOC);
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if(!$row) return null;
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return array(
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'id' => $row['id'],
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'uri' => $row['uri'],
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'lastmodified' => $row['lastmodified'],
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'etag' => '"' . $row['etag'] . '"',
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'calendarid' => $row['calendarid'],
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'size' => (int)$row['size'],
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'calendardata' => $row['calendardata'],
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);
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}
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/**
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* Creates a new calendar object.
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*
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* It is possible return an etag from this function, which will be used in
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* the response to this PUT request. Note that the ETag must be surrounded
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* by double-quotes.
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*
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* However, you should only really return this ETag if you don't mangle the
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* calendar-data. If the result of a subsequent GET to this object is not
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* the exact same as this request body, you should omit the ETag.
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*
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* @param mixed $calendarId
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* @param string $objectUri
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* @param string $calendarData
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* @return string|null
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*/
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public function createCalendarObject($calendarId,$objectUri,$calendarData) {
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$extraData = $this->getDenormalizedData($calendarData);
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$stmt = $this->pdo->prepare('INSERT INTO '.$this->calendarObjectTableName.' (calendarid, uri, calendardata, lastmodified, etag, size, componenttype, firstoccurence, lastoccurence) VALUES (?,?,?,?,?,?,?,?,?)');
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$stmt->execute(array(
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$calendarId,
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$objectUri,
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$calendarData,
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time(),
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$extraData['etag'],
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$extraData['size'],
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$extraData['componentType'],
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$extraData['firstOccurence'],
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$extraData['lastOccurence'],
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));
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$stmt = $this->pdo->prepare('UPDATE '.$this->calendarTableName.' SET ctag = ctag + 1 WHERE id = ?');
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$stmt->execute(array($calendarId));
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return '"' . $extraData['etag'] . '"';
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}
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/**
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* Updates an existing calendarobject, based on it's uri.
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*
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* It is possible return an etag from this function, which will be used in
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* the response to this PUT request. Note that the ETag must be surrounded
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* by double-quotes.
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*
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* However, you should only really return this ETag if you don't mangle the
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* calendar-data. If the result of a subsequent GET to this object is not
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* the exact same as this request body, you should omit the ETag.
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*
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* @param mixed $calendarId
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* @param string $objectUri
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* @param string $calendarData
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* @return string|null
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*/
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public function updateCalendarObject($calendarId,$objectUri,$calendarData) {
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$extraData = $this->getDenormalizedData($calendarData);
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$stmt = $this->pdo->prepare('UPDATE '.$this->calendarObjectTableName.' SET calendardata = ?, lastmodified = ?, etag = ?, size = ?, componenttype = ?, firstoccurence = ?, lastoccurence = ? WHERE calendarid = ? AND uri = ?');
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$stmt->execute(array($calendarData,time(), $extraData['etag'], $extraData['size'], $extraData['componentType'], $extraData['firstOccurence'], $extraData['lastOccurence'] ,$calendarId,$objectUri));
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$stmt = $this->pdo->prepare('UPDATE '.$this->calendarTableName.' SET ctag = ctag + 1 WHERE id = ?');
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$stmt->execute(array($calendarId));
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return '"' . $extraData['etag'] . '"';
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}
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/**
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* Parses some information from calendar objects, used for optimized
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* calendar-queries.
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*
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* Returns an array with the following keys:
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* * etag
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* * size
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* * componentType
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* * firstOccurence
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* * lastOccurence
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*
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* @param string $calendarData
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* @return array
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*/
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protected function getDenormalizedData($calendarData) {
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$vObject = VObject\Reader::read($calendarData);
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$componentType = null;
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$component = null;
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$firstOccurence = null;
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$lastOccurence = null;
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foreach($vObject->getComponents() as $component) {
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if ($component->name!=='VTIMEZONE') {
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$componentType = $component->name;
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break;
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}
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}
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if (!$componentType) {
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throw new Sabre_DAV_Exception_BadRequest('Calendar objects must have a VJOURNAL, VEVENT or VTODO component');
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}
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if ($componentType === 'VEVENT') {
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$firstOccurence = $component->DTSTART->getDateTime()->getTimeStamp();
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// Finding the last occurence is a bit harder
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if (!isset($component->RRULE)) {
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if (isset($component->DTEND)) {
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$lastOccurence = $component->DTEND->getDateTime()->getTimeStamp();
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} elseif (isset($component->DURATION)) {
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$endDate = clone $component->DTSTART->getDateTime();
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$endDate->add(VObject\DateTimeParser::parse($component->DURATION->value));
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$lastOccurence = $endDate->getTimeStamp();
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} elseif ($component->DTSTART->getDateType()===VObject\Property\DateTime::DATE) {
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$endDate = clone $component->DTSTART->getDateTime();
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$endDate->modify('+1 day');
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$lastOccurence = $endDate->getTimeStamp();
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} else {
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$lastOccurence = $firstOccurence;
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}
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} else {
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$it = new VObject\RecurrenceIterator($vObject, (string)$component->UID);
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$maxDate = new DateTime(self::MAX_DATE);
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if ($it->isInfinite()) {
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$lastOccurence = $maxDate->getTimeStamp();
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} else {
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$end = $it->getDtEnd();
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while($it->valid() && $end < $maxDate) {
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$end = $it->getDtEnd();
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$it->next();
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}
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$lastOccurence = $end->getTimeStamp();
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}
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}
|
|
}
|
|
|
|
return array(
|
|
'etag' => md5($calendarData),
|
|
'size' => strlen($calendarData),
|
|
'componentType' => $componentType,
|
|
'firstOccurence' => $firstOccurence,
|
|
'lastOccurence' => $lastOccurence,
|
|
);
|
|
|
|
}
|
|
|
|
/**
|
|
* Deletes an existing calendar object.
|
|
*
|
|
* @param string $calendarId
|
|
* @param string $objectUri
|
|
* @return void
|
|
*/
|
|
public function deleteCalendarObject($calendarId,$objectUri) {
|
|
|
|
$stmt = $this->pdo->prepare('DELETE FROM '.$this->calendarObjectTableName.' WHERE calendarid = ? AND uri = ?');
|
|
$stmt->execute(array($calendarId,$objectUri));
|
|
$stmt = $this->pdo->prepare('UPDATE '. $this->calendarTableName .' SET ctag = ctag + 1 WHERE id = ?');
|
|
$stmt->execute(array($calendarId));
|
|
|
|
}
|
|
|
|
/**
|
|
* 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 a VEVENT.
|
|
*
|
|
* ..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.
|
|
*
|
|
* This specific implementation (for the PDO) backend optimizes filters on
|
|
* specific components, and VEVENT time-ranges.
|
|
*
|
|
* @param string $calendarId
|
|
* @param array $filters
|
|
* @return array
|
|
*/
|
|
public function calendarQuery($calendarId, array $filters) {
|
|
|
|
$result = array();
|
|
$validator = new Sabre_CalDAV_CalendarQueryValidator();
|
|
|
|
$componentType = null;
|
|
$requirePostFilter = true;
|
|
$timeRange = null;
|
|
|
|
// if no filters were specified, we don't need to filter after a query
|
|
if (!$filters['prop-filters'] && !$filters['comp-filters']) {
|
|
$requirePostFilter = false;
|
|
}
|
|
|
|
// Figuring out if there's a component filter
|
|
if (count($filters['comp-filters']) > 0 && !$filters['comp-filters'][0]['is-not-defined']) {
|
|
$componentType = $filters['comp-filters'][0]['name'];
|
|
|
|
// Checking if we need post-filters
|
|
if (!$filters['prop-filters'] && !$filters['comp-filters'][0]['comp-filters'] && !$filters['comp-filters'][0]['time-range'] && !$filters['comp-filters'][0]['prop-filters']) {
|
|
$requirePostFilter = false;
|
|
}
|
|
// There was a time-range filter
|
|
if ($componentType == 'VEVENT' && isset($filters['comp-filters'][0]['time-range'])) {
|
|
$timeRange = $filters['comp-filters'][0]['time-range'];
|
|
}
|
|
|
|
}
|
|
|
|
if ($requirePostFilter) {
|
|
$query = "SELECT uri, calendardata FROM ".$this->calendarObjectTableName." WHERE calendarid = :calendarid";
|
|
} else {
|
|
$query = "SELECT uri FROM ".$this->calendarObjectTableName." WHERE calendarid = :calendarid";
|
|
}
|
|
|
|
$values = array(
|
|
'calendarid' => $calendarId,
|
|
);
|
|
|
|
if ($componentType) {
|
|
$query.=" AND componenttype = :componenttype";
|
|
$values['componenttype'] = $componentType;
|
|
}
|
|
|
|
if ($timeRange && $timeRange['start']) {
|
|
$query.=" AND lastoccurence > :startdate";
|
|
$values['startdate'] = $timeRange['start']->getTimeStamp();
|
|
}
|
|
if ($timeRange && $timeRange['end']) {
|
|
$query.=" AND firstoccurence < :enddate";
|
|
$values['enddate'] = $timeRange['end']->getTimeStamp();
|
|
}
|
|
|
|
$stmt = $this->pdo->prepare($query);
|
|
$stmt->execute($values);
|
|
|
|
$result = array();
|
|
while($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
|
|
if ($requirePostFilter) {
|
|
if (!$this->validateFilterForObject($row, $filters)) {
|
|
continue;
|
|
}
|
|
}
|
|
$result[] = $row['uri'];
|
|
|
|
}
|
|
|
|
return $result;
|
|
|
|
}
|
|
}
|