"https://www.w3.org/ns/activitystreams", "summary" => "Active Session Communities", "type" => "Collection", "totalItems" => count($rooms), "items" => array_map(function(\CommunityRoom $room) { $values = array( "type" => "Group", "name" => $room->name, "summary" => $room->description, "startTime" => $room->created ? date('Y-m-d\TH:i:s', intval($room->created)) : null, "url" => $room->get_preview_url(), "icon" => room_icon($room, '64x64') ); return array_filter($values, function ($value) { return $value != null; }); }, $rooms) ); ?>