/**
* Remove a track from a talk by DELETEing to /talks/123/tracks/456
*
* @param PDO $db
* @param Request $request
*/
public function removeTrackFromTalk(Request $request, PDO $db)
{
if (!isset($request->user_id)) {
throw new Exception("You must be logged in to create data", 400);
}
$talk_id = $this->getItemId($request);
$track_id = $request->url_elements[5];
$talk_mapper = new TalkMapper($db, $request);
$talk = $talk_mapper->getTalkById($talk_id);
if (!$talk) {
throw new Exception("Talk not found", 404);
}
$is_admin = $talk_mapper->thisUserHasAdminOn($talk_id);
$is_speaker = $talk_mapper->isUserASpeakerOnTalk($talk_id, $request->user_id);
if (!($is_admin || $is_speaker)) {
throw new Exception("You do not have permission to remove this talk from this track", 400);
}
// is this track on this event?
$event_mapper = new EventMapper($db, $request);
$track_events = $event_mapper->getEventByTrackId($track_id, true, false, false);
if (!$track_events || !$track_events[0]['ID']) {
throw new Exception("Associated event not found", 400);
}
$track_event_id = $track_events[0]['ID'];
if ($talk->event_id != $track_event_id) {
throw new Exception("This talk cannot be added to this track", 400);
}
// delete track from talk
$talk_mapper->removeTrackFromTalk($talk_id, $track_id);
$uri = $request->base . '/' . $request->version . '/talks/' . $talk_id;
header('Location: ' . $uri, null, 204);
exit;
}