/**
* Returns a list of communication IDs for the specified membership.
*
* Possible values:
* null .. All communication IDs are returned.
* 0 .. Global communication IDs are returned (defined in Settings page).
* <MembershipID> .. Communication IDs of that membership are returned.
*
* @since 1.0.1.0
* @param int $membership Indtifies a membership.
* @return array List of communication IDs.
*/
protected static function get_communication_ids($membership)
{
if (!isset(self::$Communication_IDs[0])) {
self::$Communication_IDs = array(0 => array());
$args = array('post_type' => self::get_post_type(), 'post_status' => 'any', 'fields' => 'ids', 'posts_per_page' => -1);
MS_Factory::select_blog();
$query = new WP_Query($args);
$items = $query->posts;
MS_Factory::revert_blog();
foreach ($items as $id) {
$comm = MS_Factory::load('MS_Model_Communication', $id);
self::$Communication_IDs[$comm->membership_id][$comm->type] = $id;
}
}
if ($membership instanceof MS_Model_Membership) {
$key = $membership->id;
} else {
$key = $membership;
}
if (null === $key) {
$result = self::$Communication_IDs;
} elseif (isset(self::$Communication_IDs[$key])) {
$result = self::$Communication_IDs[$key];
} else {
$result = array();
}
return $result;
}
