/**
* Subscribes the provided user ID's
* Returns the updates progress
*/
protected function subscribe_users()
{
// make sure `user_ids` is an array
$user_ids = $_REQUEST['user_ids'];
if (!is_array($user_ids)) {
$user_ids = sanitize_text_field($user_ids);
$user_ids = explode(',', $user_ids);
}
$result = $this->wizard->subscribe_users($user_ids);
if ($result) {
$this->respond(array('success' => true));
}
// send response
$this->respond(array('success' => $result, 'error' => $this->wizard->get_error()));
}