forked from friendica/friendica-addons
287 lines
7.7 KiB
PHP
287 lines
7.7 KiB
PHP
<?php
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abstract class Sabre_CalDAV_Backend_Common extends Sabre_CalDAV_Backend_Abstract
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{
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/**
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* @var array
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*/
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protected $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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* @abstract
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* @return int
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*/
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abstract public function getNamespace();
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/**
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* @static
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* @abstract
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* @return string
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*/
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abstract public static function getBackendTypeName();
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/**
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* @param int $calendarId
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* @param string $sd
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* @param string $ed
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* @param string $base_path
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* @return array
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*/
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abstract public function listItemsByRange($calendarId, $sd, $ed, $base_path);
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/**
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* @var array
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*/
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static private $calendarCache = array();
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/**
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* @var array
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*/
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static private $calendarObjectCache = array();
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/**
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* @static
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* @param int $calendarId
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* @return array
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*/
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static public function loadCalendarById($calendarId)
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{
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if (!isset(self::$calendarCache[$calendarId])) {
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$c = q("SELECT * FROM %s%scalendars WHERE `id` = %d", CALDAV_SQL_DB, CALDAV_SQL_PREFIX, IntVal($calendarId));
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self::$calendarCache[$calendarId] = $c[0];
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}
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return self::$calendarCache[$calendarId];
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}
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/**
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* @static
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* @param int $obj_id
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* @return array
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*/
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static public function loadCalendarobjectById($obj_id)
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{
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if (!isset(self::$calendarObjectCache[$obj_id])) {
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$o = q("SELECT * FROM %s%scalendarobjects WHERE `id` = %d",
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CALDAV_SQL_DB, CALDAV_SQL_PREFIX, IntVal($obj_id)
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);
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self::$calendarObjectCache[$obj_id] = $o[0];
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}
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return self::$calendarObjectCache[$obj_id];
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}
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/**
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* @static
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* @param Sabre_VObject_Component_VEvent $component
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* @return int
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*/
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public static function getDtEndTimeStamp(&$component)
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{
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/** @var Sabre_VObject_Property_DateTime $dtstart */
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$dtstart = $component->__get("DTSTART");
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if ($component->__get("DTEND")) {
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/** @var Sabre_VObject_Property_DateTime $dtend */
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$dtend = $component->__get("DTEND");
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return $dtend->getDateTime()->getTimeStamp();
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} elseif ($component->__get("DURATION")) {
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$endDate = clone $dtstart->getDateTime();
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$endDate->add(Sabre_VObject_DateTimeParser::parse($component->__get("DURATION")->value));
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return $endDate->getTimeStamp();
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} elseif ($dtstart->getDateType() === Sabre_VObject_Property_DateTime::DATE) {
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$endDate = clone $dtstart->getDateTime();
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$endDate->modify('+1 day');
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return $endDate->getTimeStamp();
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} else {
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return $dtstart->getDateTime()->getTimeStamp() + 3600;
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}
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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 $calendarData
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* @throws Sabre_DAV_Exception_BadRequest
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* @return array
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*/
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protected function getDenormalizedData($calendarData)
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{
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/** @var Sabre_VObject_Component_VEvent $vObject */
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$vObject = Sabre_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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/** @var Sabre_VObject_Component_VEvent $component */
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/** @var Sabre_VObject_Property_DateTime $dtstart */
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$dtstart = $component->__get("DTSTART");
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$firstOccurence = $dtstart->getDateTime()->getTimeStamp();
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// Finding the last occurence is a bit harder
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if (!$component->__get("RRULE")) {
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$lastOccurence = self::getDtEndTimeStamp($component);
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} else {
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$it = new Sabre_VObject_RecurrenceIterator($vObject, (string)$component->__get("UID"));
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$maxDate = new DateTime(CALDAV_MAX_YEAR . "-01-01");
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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 = $end->getTimeStamp();
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}
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}
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}
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return array(
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'etag' => md5($calendarData),
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'size' => strlen($calendarData),
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'componentType' => $componentType,
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'firstOccurence' => $firstOccurence,
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'lastOccurence' => $lastOccurence,
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);
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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 mixed $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 $mutations)
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{
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$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 $result;
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}
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$this->increaseCalendarCtag($calendarId);
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$valuesSql = array();
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foreach ($newValues as $fieldName=> $value) $valuesSql[] = "`" . $fieldName . "` = '" . dbesc($value) . "'";
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if (count($valuesSql) > 0) {
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q("UPDATE %s%scalendars SET " . implode(", ", $valuesSql) . " WHERE `id` = %d", CALDAV_SQL_DB, CALDAV_SQL_PREFIX, IntVal($calendarId));
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}
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return true;
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}
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/**
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* @param int $calendarId
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*/
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protected function increaseCalendarCtag($calendarId)
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{
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q("UPDATE %s%scalendars SET `ctag` = `ctag` + 1 WHERE `id` = '%d'", CALDAV_SQL_DB, CALDAV_SQL_PREFIX, IntVal($calendarId));
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self::$calendarObjectCache = array();
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}
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/**
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* @abstract
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* @param int $calendar_id
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* @param int $calendarobject_id
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* @return string
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*/
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abstract function getItemDetailRedirect($calendar_id, $calendarobject_id);
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} |