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<?php
/**
* Abstract Calendaring backend. Extend this class to create your own backends.
*
* @package Sabre
* @subpackage CalDAV
* @copyright Copyright (C) 2007-2012 Rooftop Solutions. All rights reserved.
* @author Evert Pot (http://www.rooftopsolutions.nl/)
* @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
*/
abstract class Sabre_CalDAV_Backend_Abstract {
/**
* Returns a list of calendars for a principal.
*
* 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
* accessed.
* * principaluri. The owner of the calendar. Almost always the same as
* principalUri passed to this method.
*
* Furthermore it can contain webdav properties in clark notation. A very
* common one is '{DAV:}displayname'.
*
* @param string $principalUri
* @return array
*/
abstract function getCalendarsForUser($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.
*
* @param string $principalUri
* @param string $calendarUri
* @param array $properties
* @return void
*/
abstract function createCalendar($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.
*
* This method must be atomic. If one property cannot be changed, the
* entire operation must fail.
*
* If the operation was successful, true can be returned.
* If the operation failed, false can be returned.
*
* 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 string $calendarId
* @param array $mutations
* @return bool|array
*/
public function updateCalendar($calendarId, array $mutations) {
return false;
}
/**
* Delete a calendar and all it's objects
*
* @param string $calendarId
* @return void
*/
abstract function deleteCalendar($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.
* * 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.
*
* Note that the etag is optional, but it's highly encouraged to return for
* speed reasons.
*
* The calendardata is also optional. If it's not returned
* 'getCalendarObject' will be called later, which *is* expected to return
* calendardata.
*
* If neither etag or size are specified, the calendardata will be
* used/fetched to determine these numbers. If both are specified the
* amount of times this is needed is reduced by a great degree.
*
* @param string $calendarId
* @return array
*/
abstract function getCalendarObjects($calendarId);
/**
* Returns information from a single calendar object, based on it's object
* uri.
*
* The returned array must have the same keys as getCalendarObjects. The
* 'calendardata' object is required here though, while it's not required
* for getCalendarObjects.
*
* @param string $calendarId
* @param string $objectUri
* @return array
*/
abstract function getCalendarObject($calendarId,$objectUri);
/**
* Creates a new calendar object.
*
* @param string $calendarId
* @param string $objectUri
* @param string $calendarData
* @return void
*/
abstract function createCalendarObject($calendarId,$objectUri,$calendarData);
/**
* Updates an existing calendarobject, based on it's uri.
*
* @param string $calendarId
* @param string $objectUri
* @param string $calendarData
* @return void
*/
abstract function updateCalendarObject($calendarId,$objectUri,$calendarData);
/**
* Deletes an existing calendar object.
*
* @param string $calendarId
* @param string $objectUri
* @return void
*/
abstract function deleteCalendarObject($calendarId,$objectUri);
}
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