function caldav_get_feed($request, $collection)
{
global $c, $session;
dbg_error_log("feed", "GET method handler");
$collection->NeedPrivilege(array('DAV::read'));
if (!$collection->Exists()) {
$request->DoResponse(404, translate("Resource Not Found."));
}
if (!$collection->IsCollection() || !$collection->IsCalendar() && !(isset($c->get_includes_subcollections) && $c->get_includes_subcollections)) {
$request->DoResponse(405, translate("Feeds are only supported for calendars at present."));
}
// Try and pull the answer out of a hat
$cache = getCacheInstance();
$cache_ns = 'collection-' . $collection->dav_name();
$cache_key = 'feed' . $session->user_no;
$response = $cache->get($cache_ns, $cache_key);
if ($response !== false) {
return $response;
}
$principal = $collection->GetProperty('principal');
/**
* The CalDAV specification does not define GET on a collection, but typically this is
* used as a .ics download for the whole collection, which is what we do also.
*/
$sql = 'SELECT caldav_data, caldav_type, caldav_data.user_no, caldav_data.dav_name,';
$sql .= ' caldav_data.modified, caldav_data.created, ';
$sql .= ' summary, dtstart, dtend, calendar_item.description ';
$sql .= ' FROM collection INNER JOIN caldav_data USING(collection_id) INNER JOIN calendar_item USING ( dav_id ) WHERE ';
if (isset($c->get_includes_subcollections) && $c->get_includes_subcollections) {
$sql .= ' (collection.dav_name ~ :path_match ';
$sql .= ' OR collection.collection_id IN (SELECT bound_source_id FROM dav_binding WHERE dav_binding.dav_name ~ :path_match)) ';
$params = array(':path_match' => '^' . $request->path);
} else {
$sql .= ' caldav_data.collection_id = :collection_id ';
$params = array(':collection_id' => $collection->resource_id());
}
$sql .= ' ORDER BY caldav_data.created DESC';
$sql .= ' LIMIT ' . (isset($c->feed_item_limit) ? $c->feed_item_limit : 15);
$qry = new AwlQuery($sql, $params);
if (!$qry->Exec("GET", __LINE__, __FILE__)) {
$request->DoResponse(500, translate("Database Error"));
}
/**
* Here we are constructing the feed response for this collection, including
* the timezones that are referred to by the events we have selected.
* Library used: http://framework.zend.com/manual/en/zend.feed.writer.html
*/
require_once 'AtomFeed.php';
$feed = new AtomFeed();
$feed->setTitle('DAViCal Atom Feed: ' . $collection->GetProperty('displayname'));
$url = $c->protocol_server_port . $collection->url();
$url = preg_replace('{/$}', '.ics', $url);
$feed->setLink($url);
$feed->setFeedLink($c->protocol_server_port_script . $request->path, 'atom');
$feed->addAuthor(array('name' => $principal->GetProperty('displayname'), 'email' => $principal->GetProperty('email'), 'uri' => $c->protocol_server_port . $principal->url()));
$feed_description = $collection->GetProperty('description');
if (isset($feed_description) && $feed_description != '') {
$feed->setDescription($feed_description);
}
require_once 'RRule-v2.php';
$need_zones = array();
$timezones = array();
while ($event = $qry->Fetch()) {
if ($event->caldav_type != 'VEVENT' && $event->caldav_type != 'VTODO' && $event->caldav_type != 'VJOURNAL') {
dbg_error_log('feed', 'Skipping peculiar "%s" component in VCALENDAR', $event->caldav_type);
continue;
}
$is_todo = $event->caldav_type == 'VTODO';
$ical = new vComponent($event->caldav_data);
$event_data = $ical->GetComponents('VTIMEZONE', false);
$item = $feed->createEntry();
$item->setId($c->protocol_server_port_script . ConstructURL($event->dav_name));
$dt_created = new RepeatRuleDateTime($event->created);
$item->setDateCreated($dt_created->epoch());
$dt_modified = new RepeatRuleDateTime($event->modified);
$item->setDateModified($dt_modified->epoch());
$summary = $event->summary;
$p_title = $summary != '' ? $summary : translate('No summary');
if ($is_todo) {
$p_title = "TODO: " . $p_title;
}
$item->setTitle($p_title);
$content = "";
$dt_start = new RepeatRuleDateTime($event->dtstart);
if ($dt_start != null) {
$p_time = '<strong>' . translate('Time') . ':</strong> ' . strftime(translate('%F %T'), $dt_start->epoch());
$dt_end = new RepeatRuleDateTime($event->dtend);
if ($dt_end != null) {
$p_time .= ' - ' . ($dt_end->AsDate() == $dt_start->AsDate() ? strftime(translate('%T'), $dt_end->epoch()) : strftime(translate('%F %T'), $dt_end->epoch()));
}
$content .= $p_time;
}
$p_location = $event_data[0]->GetProperty('LOCATION');
if ($p_location != null) {
$content .= '<br />' . '<strong>' . translate('Location') . '</strong>: ' . hyperlink($p_location->Value());
}
$p_attach = $event_data[0]->GetProperty('ATTACH');
if ($p_attach != null) {
$content .= '<br />' . '<strong>' . translate('Attachment') . '</strong>: ' . hyperlink($p_attach->Value());
}
$p_url = $event_data[0]->GetProperty('URL');
if ($p_url != null) {
$content .= '<br />' . '<strong>' . translate('URL') . '</strong>: ' . hyperlink($p_url->Value());
}
$p_cat = $event_data[0]->GetProperty('CATEGORIES');
if ($p_cat != null) {
$content .= '<br />' . '<strong>' . translate('Categories') . '</strong>: ' . $p_cat->Value();
$categories = explode(',', $p_cat->Value());
foreach ($categories as $category) {
$item->addCategory(array('term' => trim($category)));
}
}
$p_description = $event->description;
if ($p_description != '') {
$content .= '<br />' . '<br />' . '<strong>' . translate('Description') . '</strong>:<br />' . nl2br(hyperlink($p_description));
$item->setDescription($p_description);
}
$item->setContent($content);
$feed->addEntry($item);
//break;
}
$last_modified = new RepeatRuleDateTime($collection->GetProperty('modified'));
$feed->setDateModified($last_modified->epoch());
$response = $feed->export('atom');
$cache->set($cache_ns, $cache_key, $response);
return $response;
}