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Caldav Schnittstelle für LVPlan
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Andreas Österreicher
@@ -0,0 +1,358 @@
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<?php
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require_once(dirname(__FILE__).'/../include/wochenplan.class.php');
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/**
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* CalDAV backend
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*/
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class MySabre_CalDAV_Backend extends Sabre_CalDAV_Backend_Abstract
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{
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/**
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* Creates the backend
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*
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* @param AuthBackend $auth
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*/
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public function __construct($auth)
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{
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$this->auth = $auth;
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}
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/**
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* Liefert den eingeloggten User
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*/
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function getUser()
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{
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return $this->auth->getCurrentUser();
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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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{
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//error_log("Caldav_Backend.php/getCalendarsForUser($principalUri)");
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$user = $this->getUser();
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$calendars = array();
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$calendar = array(
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'id' => $user,
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'uri' => 'LVPlan-'.$user,
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'principaluri' => 'principals/'.$user,
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'{' . Sabre_CalDAV_Plugin::NS_CALENDARSERVER . '}getctag' => 'LVPlan-'.$user.'-'.time(),
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'{' . Sabre_CalDAV_Plugin::NS_CALDAV . '}supported-calendar-component-set' => new Sabre_CalDAV_Property_SupportedCalendarComponentSet(array('VEVENT','VTODO')),
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'{DAV:}displayname' => 'LVPlan',
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'{urn:ietf:params:xml:ns:caldav}calendar-description' => 'description comes here',
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'{urn:ietf:params:xml:ns:caldav}calendar-timezone' => 'Europe/Vienna',
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'{http://apple.com/ns/ical/}calendar-order' => '1',
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'{http://apple.com/ns/ical/}calendar-color' => '#FF0000'
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);
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$calendars[] = $calendar;
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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 $properties
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*/
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public function createCalendar($principalUri,$calendarUri, array $properties)
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{
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throw new Sabre_DAV_Exception('Not Implemented');
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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-existant property is always succesful.
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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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{
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return false;
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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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{
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throw new Sabre_DAV_Exception('Not Implemented');
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}
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public function getCalendarData($user, $objectUri=null)
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{
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$bn = new benutzer();
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if(!$bn->load($user))
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die('User invalid');
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if(check_lektor($user))
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$type='lektor';
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else
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$type='student';
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// Stundenplanobjekt erzeugen
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$stdplan = new wochenplan($type);
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$stdplan->crlf="\n";
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// Zusaetzliche Daten laden
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if(!$stdplan->load_data($type,$user))
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{
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die($stdplan->errormsg);
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}
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if(!is_null($objectUri))
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{
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$unr = mb_substr($objectUri, mb_strpos($objectUri,'-')+1);
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$dtstart = mb_substr($objectUri,0,mb_strpos($objectUri,'-'));
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//dtstart: 19700325T020000Z
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$jahr = mb_substr($dtstart,0,4);
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$monat = mb_substr($dtstart,4,2);
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$tag = mb_substr($dtstart,6,2);
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$stunde = mb_substr($dtstart,9,2);
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$minute = mb_substr($dtstart,11,2);
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$sekunde = mb_substr($dtstart,13,2);
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$begin = mktime($stunde, $minute, $sekunde, $monat, $tag-1, $jahr);
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$ende = mktime($stunde, $minute, $sekunde, $monat, $tag+1, $jahr);
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error_log("getCalendarData unr: $unr dtstart: $dtstart");
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error_log($begin.'/'.$ende);
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}
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else
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{
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//TODO Datum eventuell anpassen derzeit nur aktuell +/- 6 Monate
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$begin = mktime(0,0,0,date('m')-6,date('d'),date('Y'));
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$ende = mktime(0,0,0,date('m')+6,date('d'),date('Y'));
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}
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$db_stpl_table = 'stundenplan';
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$i=0;
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$data = array();
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// Kalender erstellen
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while($begin<$ende)
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{
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error_log("while");
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$i++;
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if(!date("w",$begin))
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$begin=jump_day($begin,1);
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$stdplan->init_stdplan();
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$datum=$begin;
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$begin+=604800; // eine Woche
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// Stundenplan einer Woche laden
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if(!$stdplan->load_week($datum,$db_stpl_table))
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{
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die($stdplan->errormsg);
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}
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$val = $stdplan->draw_week_csv('return', LVPLAN_KATEGORIE);
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if(!is_null($objectUri))
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{
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foreach($val as $row)
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{
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error_log("search dtstart:".$dtstart." unr:".$unr);
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error_log("row dtstart:".$row['dtstart']." unr:".$row['unr'][0]);
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if($row['dtstart']==$dtstart && $row['unr'][0]==$unr)
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{
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error_log("found!");
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return $row;
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}
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}
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}
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else
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$data=array_merge($data, $val);
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}
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//$data.="\nEND:VCALENDAR";
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return $data;
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}
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public function makeCal($event)
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{
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return "BEGIN:VCALENDAR
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VERSION:2.0
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PRODID:FH Technikum Wien
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BEGIN:VTIMEZONE
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TZID:Europe/Vienna
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BEGIN:DAYLIGHT
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TZOFFSETFROM:+0100
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RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=-1SU
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DTSTART:19810329T020000
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TZNAME:GMT+02:00
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TZOFFSETTO:+0200
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END:DAYLIGHT
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BEGIN:STANDARD
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TZOFFSETFROM:+0200
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RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU
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DTSTART:19961027T030000
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TZNAME:GMT+01:00
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TZOFFSETTO:+0100
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END:STANDARD
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END:VTIMEZONE\n".$event."\nEND:VCALENDAR";
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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 calnedar 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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*
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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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* @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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{
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//$user = $this->getUser();
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$user = $calendarId;
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$data = $this->getCalendarData($user);
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error_log("Caldav_Backend.php/getCalendarObjects($calendarId) data:".print_r($data,true));
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$return = array();
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foreach($data as $row)
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{
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$return[] = array("id"=>$row['UID'],
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"calendardata"=>$this->makeCal($row['data']),
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"uri"=>$row['dtstart'].'-'.$row['unr'][0],
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"lastmodified"=>$row['updateamum'],
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"etag"=>'"'.$row['UID'].'"',
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"calendarid"=>$calendarId);
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}
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return $return;
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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,$objectUri)
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{
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error_log("Caldav_Backend.php/getCalendarObject($calendarId, $objectUri)");
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$user = $this->getUser();
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$data = $this->getCalendarData($user,$objectUri);
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if(count($data)==0)
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{
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$ret=array("id"=>'',
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"calendardata"=>'',
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"uri"=>'',
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"lastmodified"=>'',
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"etag"=>'',
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"calendarid"=>$calendarId);
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}
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else
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{
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$ret = array("id"=>$data['UID'],
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"calendardata"=>$this->makeCal($data['data']),
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"uri"=>'principals/'.$user.'/LVPlan/'.$data['dtstart'].'-'.$data['unr'][0],
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"lastmodified"=>$data['updateamum'],
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"etag"=>'"'.$data['UID'].'"',
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"calendarid"=>$calendarId);
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}
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return $ret;
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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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* @param string $calendarId
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* @param string $objectUri
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* @param string $calendarData
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* @return void
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*/
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public function createCalendarObject($calendarId,$objectUri,$calendarData)
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{
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throw new Sabre_DAV_Exception('Not Implemented');
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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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* @param string $calendarId
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* @param string $objectUri
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* @param string $calendarData
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* @return void
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*/
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public function updateCalendarObject($calendarId,$objectUri,$calendarData)
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{
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throw new Sabre_DAV_Exception('Not Implemented');
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}
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/**
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* Deletes an existing calendar object.
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*
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* @param string $calendarId
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* @param string $objectUri
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* @return void
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*/
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public function deleteCalendarObject($calendarId,$objectUri)
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{
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throw new Sabre_DAV_Exception('Not Implemented');
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}
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}
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