function remove_track()
{
$userid = $this->session->userdata('userid');
$result = array("error" => FALSE);
if (!$userid) {
$result["error"] = "User must be logged in to access her playlist.";
} else {
$trackid = array($this->input->post('trackid'));
$albumid = array($this->input->post('albumid'));
$playlistid = $this->input->post('playlistid');
try {
$pl = Playlist::load($playlistid);
if ($pl->getOwnerId() != $userid) {
throw new Exception("Sorry, you are not allowed to remove tracks from a playlist you did not create");
}
if (!Playlist::removeTracks($trackid, $albumid, $playlistid)) {
$result["error"] = TRUE;
}
} catch (Exception $e) {
$result["error"] = $e->getMessage();
}
}
echo json_encode($result);
}