function add_subscribers(ContentDataObject $object, $subscribers = null, $check_permissions = true)
{
if (logged_user()->isGuest()) {
flash_error(lang('no access permissions'));
ajx_current("empty");
return;
}
$log_info = "";
$log_info_unsubscribe = "";
if ($subscribers == null) {
$subscribers = array_var($_POST, 'subscribers');
}
$subscribers_ids = array();
if (is_array($subscribers)) {
$user_ids = array();
$subscribers_to_remove = array();
//add new subscribers
foreach ($subscribers as $key => $checked) {
$user_id = substr($key, 5);
$subscribers_ids[] = $user_id;
if ($checked == "1" && !in_array($user_id, $object->getSubscriberIds())) {
$user = Contacts::findById($user_id);
if ($user instanceof Contact) {
$object->subscribeUser($user);
$log_info .= ($log_info == "" ? "" : ",") . $user->getId();
$user_ids[] = $user_id;
}
} else {
if ((!$checked || $checked == '0') && in_array($user_id, $object->getSubscriberIds())) {
$subscribers_to_remove[] = $user_id;
}
}
}
//remove subscribers
//$subscribers_to_remove = array_diff($object->getSubscriberIds(), $subscribers_ids);
foreach ($subscribers_to_remove as $subs_remove) {
$user = Contacts::findById($subs_remove);
if ($user instanceof Contact) {
$object->unsubscribeUser($user);
$log_info_unsubscribe .= ($log_info_unsubscribe == "" ? "" : ",") . $user->getId();
}
}
Hook::fire('after_add_subscribers', array('object' => $object, 'user_ids' => $user_ids), $null);
if ($log_info != "") {
ApplicationLogs::createLog($object, ApplicationLogs::ACTION_SUBSCRIBE, false, true, true, $log_info);
}
if ($log_info_unsubscribe != "") {
ApplicationLogs::createLog($object, ApplicationLogs::ACTION_UNSUBSCRIBE, false, true, true, $log_info_unsubscribe);
}
} else {
$subscribers_to_remove = $object->getSubscriberIds();
foreach ($subscribers_to_remove as $user_id_remove) {
$log_info_unsubscribe .= ($log_info_unsubscribe == "" ? "" : ",") . $user_id_remove;
}
$object->clearSubscriptions();
if ($log_info_unsubscribe != "") {
ApplicationLogs::createLog($object, ApplicationLogs::ACTION_UNSUBSCRIBE, false, true, true, $log_info_unsubscribe);
}
}
if ($check_permissions) {
// remove subscribers without permissions
$subscribed_users = $object->getSubscribers();
foreach ($subscribed_users as $user) {
if (!$object->canView($user)) {
$object->unsubscribeUser($user);
}
}
}
}
