server = $server; $server->on('method:GET', [$this, 'httpGet'], 90); $server->on('browserButtonActions', function($path, $node, &$actions) { if ($node instanceof ICalendar) { $actions .= ''; } }); } /** * Intercepts GET requests on calendar urls ending with ?export. * * @param RequestInterface $request * @param ResponseInterface $response * @return bool */ function httpGet(RequestInterface $request, ResponseInterface $response) { $queryParams = $request->getQueryParameters(); if (!array_key_exists('export', $queryParams)) return; $path = $request->getPath(); $node = $this->server->getProperties($path, [ '{DAV:}resourcetype', '{DAV:}displayname', '{http://sabredav.org/ns}sync-token', '{DAV:}sync-token', '{http://apple.com/ns/ical/}calendar-color', ]); if (!isset($node['{DAV:}resourcetype']) || !$node['{DAV:}resourcetype']->is('{' . Plugin::NS_CALDAV . '}calendar')) { return; } // Marking the transactionType, for logging purposes. $this->server->transactionType = 'get-calendar-export'; $properties = $node; $start = null; $end = null; $expand = false; $componentType = false; if (isset($queryParams['start'])) { if (!ctype_digit($queryParams['start'])) { throw new BadRequest('The start= parameter must contain a unix timestamp'); } $start = DateTime::createFromFormat('U', $queryParams['start']); } if (isset($queryParams['end'])) { if (!ctype_digit($queryParams['end'])) { throw new BadRequest('The end= parameter must contain a unix timestamp'); } $end = DateTime::createFromFormat('U', $queryParams['end']); } if (isset($queryParams['expand']) && !!$queryParams['expand']) { if (!$start || !$end) { throw new BadRequest('If you\'d like to expand recurrences, you must specify both a start= and end= parameter.'); } $expand = true; $componentType = 'VEVENT'; } if (isset($queryParams['componentType'])) { if (!in_array($queryParams['componentType'], ['VEVENT', 'VTODO', 'VJOURNAL'])) { throw new BadRequest('You are not allowed to search for components of type: ' . $queryParams['componentType'] . ' here'); } $componentType = $queryParams['componentType']; } $format = \Sabre\HTTP\Util::Negotiate( $request->getHeader('Accept'), [ 'text/calendar', 'application/calendar+json', ] ); if (isset($queryParams['accept'])) { if ($queryParams['accept'] === 'application/calendar+json' || $queryParams['accept'] === 'jcal') { $format = 'application/calendar+json'; } } if (!$format) { $format = 'text/calendar'; } $this->generateResponse($path, $start, $end, $expand, $componentType, $format, $properties, $response); // Returning false to break the event chain return false; } /** * This method is responsible for generating the actual, full response. * * @param string $path * @param DateTime|null $start * @param DateTime|null $end * @param bool $expand * @param string $componentType * @param string $format * @param array $properties * @param ResponseInterface $response */ protected function generateResponse($path, $start, $end, $expand, $componentType, $format, $properties, ResponseInterface $response) { $calDataProp = '{' . Plugin::NS_CALDAV . '}calendar-data'; $calendarNode = $this->server->tree->getNodeForPath($path); $blobs = []; if ($start || $end || $componentType) { // If there was a start or end filter, we need to enlist // calendarQuery for speed. $queryResult = $calendarNode->calendarQuery([ 'name' => 'VCALENDAR', 'comp-filters' => [ [ 'name' => $componentType, 'comp-filters' => [], 'prop-filters' => [], 'is-not-defined' => false, 'time-range' => [ 'start' => $start, 'end' => $end, ], ], ], 'prop-filters' => [], 'is-not-defined' => false, 'time-range' => null, ]); // queryResult is just a list of base urls. We need to prefix the // calendar path. $queryResult = array_map( function($item) use ($path) { return $path . '/' . $item; }, $queryResult ); $nodes = $this->server->getPropertiesForMultiplePaths($queryResult, [$calDataProp]); unset($queryResult); } else { $nodes = $this->server->getPropertiesForPath($path, [$calDataProp], 1); } // Flattening the arrays foreach ($nodes as $node) { if (isset($node[200][$calDataProp])) { $blobs[$node['href']] = $node[200][$calDataProp]; } } unset($nodes); $mergedCalendar = $this->mergeObjects( $properties, $blobs ); if ($expand) { $calendarTimeZone = null; // We're expanding, and for that we need to figure out the // calendar's timezone. $tzProp = '{' . Plugin::NS_CALDAV . '}calendar-timezone'; $tzResult = $this->server->getProperties($path, [$tzProp]); if (isset($tzResult[$tzProp])) { // This property contains a VCALENDAR with a single // VTIMEZONE. $vtimezoneObj = VObject\Reader::read($tzResult[$tzProp]); $calendarTimeZone = $vtimezoneObj->VTIMEZONE->getTimeZone(); // Destroy circular references to PHP will GC the object. $vtimezoneObj->destroy(); unset($vtimezoneObj); } else { // Defaulting to UTC. $calendarTimeZone = new DateTimeZone('UTC'); } $mergedCalendar = $mergedCalendar->expand($start, $end, $calendarTimeZone); } $filenameExtension = '.ics'; switch ($format) { case 'text/calendar' : $mergedCalendar = $mergedCalendar->serialize(); $filenameExtension = '.ics'; break; case 'application/calendar+json' : $mergedCalendar = json_encode($mergedCalendar->jsonSerialize()); $filenameExtension = '.json'; break; } $filename = preg_replace( '/[^a-zA-Z0-9-_ ]/um', '', $calendarNode->getName() ); $filename .= '-' . date('Y-m-d') . $filenameExtension; $response->setHeader('Content-Disposition', 'attachment; filename="' . $filename . '"'); $response->setHeader('Content-Type', $format); $response->setStatus(200); $response->setBody($mergedCalendar); } /** * Merges all calendar objects, and builds one big iCalendar blob. * * @param array $properties Some CalDAV properties * @param array $inputObjects * @return VObject\Component\VCalendar */ function mergeObjects(array $properties, array $inputObjects) { $calendar = new VObject\Component\VCalendar(); $calendar->VERSION = '2.0'; if (DAV\Server::$exposeVersion) { $calendar->PRODID = '-//SabreDAV//SabreDAV ' . DAV\Version::VERSION . '//EN'; } else { $calendar->PRODID = '-//SabreDAV//SabreDAV//EN'; } if (isset($properties['{DAV:}displayname'])) { $calendar->{'X-WR-CALNAME'} = $properties['{DAV:}displayname']; } if (isset($properties['{http://apple.com/ns/ical/}calendar-color'])) { $calendar->{'X-APPLE-CALENDAR-COLOR'} = $properties['{http://apple.com/ns/ical/}calendar-color']; } $collectedTimezones = []; $timezones = []; $objects = []; foreach ($inputObjects as $href => $inputObject) { $nodeComp = VObject\Reader::read($inputObject); foreach ($nodeComp->children() as $child) { switch ($child->name) { case 'VEVENT' : case 'VTODO' : case 'VJOURNAL' : $objects[] = clone $child; break; // VTIMEZONE is special, because we need to filter out the duplicates case 'VTIMEZONE' : // Naively just checking tzid. if (in_array((string)$child->TZID, $collectedTimezones)) continue; $timezones[] = clone $child; $collectedTimezones[] = $child->TZID; break; } } // Destroy circular references to PHP will GC the object. $nodeComp->destroy(); unset($nodeComp); } foreach ($timezones as $tz) $calendar->add($tz); foreach ($objects as $obj) $calendar->add($obj); return $calendar; } /** * Returns a plugin name. * * Using this name other plugins will be able to access other plugins * using \Sabre\DAV\Server::getPlugin * * @return string */ function getPluginName() { return 'ics-export'; } /** * Returns a bunch of meta-data about the plugin. * * Providing this information is optional, and is mainly displayed by the * Browser plugin. * * The description key in the returned array may contain html and will not * be sanitized. * * @return array */ function getPluginInfo() { return [ 'name' => $this->getPluginName(), 'description' => 'Adds the ability to export CalDAV calendars as a single iCalendar file.', 'link' => 'http://sabre.io/dav/ics-export-plugin/', ]; } }