$group_id = intval($_POST['id']);
$relation_type = intval($_POST['relation']);
if (!is_array($UserList)) {
$UserList = array();
}
if ($form_sent == 1) {
if ($relation_type == GROUP_USER_PERMISSION_PENDING_INVITATION) {
$relations = array(GROUP_USER_PERMISSION_PENDING_INVITATION, GROUP_USER_PERMISSION_READER);
$users_by_group = GroupPortalManager::get_users_by_group($group_id, null, $relations);
$user_id_relation = array_keys($users_by_group);
$user_relation_diff = array_diff($user_id_relation, $UserList);
foreach ($user_relation_diff as $user_id) {
GroupPortalManager::delete_user_rel_group($user_id, $group_id);
}
} else {
GroupPortalManager::delete_users($group_id, $relation_type);
}
$result = GroupPortalManager::add_users_to_groups($UserList, array($group_id), $relation_type);
Display::display_confirmation_message(get_lang('UsersEdited'));
}
}
$nosessionUsersList = $sessionUsersList = array();
$ajax_search = $add_type == 'unique' ? true : false;
$order_clause = api_sort_by_first_name() ? ' ORDER BY firstname, lastname, username' : ' ORDER BY lastname, firstname, username';
if ($ajax_search) {
// data for destination list
if (isset($_POST['id']) && isset($_POST['relation'])) {
// data for destination user list
$id = intval($_POST['id']);
$relation_type = intval($_POST['relation']);
$condition_relation = "";
