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<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
/**
* Main functions of the plugin.
*
* @copyright 2018 "Valentin Popov" <info@valentineus.link>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
* @package tool_apisiteadmins
*/
defined("MOODLE_INTERNAL") || die();
/**
* Functions for working with the list of administrators.
*
* @copyright 2018 "Valentin Popov" <info@valentineus.link>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
* @package tool_apisiteadmins
*/
class tool_apisiteadmins {
/**
* Adds a user to the list of administrators.
*
* @param number $userid System user ID
* @return boolean Result of execution
*/
public static function add_user($userid) {
if (!core_user::is_real_user($userid, true)) {
print_error("invaliduser", "error", null);
}
$userid = (int)$userid;
$admins = self::get_list();
$admins[$userid] = $userid;
self::create_event("administrator_added", $userid);
return self::save_changes($admins);
}
/**
* Removes a user from the list of administrators.
*
* @param number $userid System user ID
* @return boolean Result of execution
*/
public static function remove_user($userid) {
if (!core_user::is_real_user($userid, true)) {
print_error("invaliduser", "error", null);
}
$userid = (int)$userid;
$admins = self::get_list();
unset($admins[$userid]);
self::create_event("administrator_deleted", $userid);
return self::save_changes($admins);
}
/**
* Registers the user as the primary administrator.
*
* @param number $userid System user ID
* @return boolean Result of execution
*/
public static function set_main($userid) {
if (!core_user::is_real_user($userid, true)) {
print_error("invaliduser", "error", null);
}
$userid = (int)$userid;
$admins = self::get_list();
if (isset($admins[$userid])) {
unset($admins[$userid]);
array_unshift($admins, $userid);
}
self::create_event("administrator_changed", $userid);
return self::save_changes($admins);
}
/**
* Creates an entry in the system log.
*
* @param string $name Event name
* @param number $userid System user ID
*/
private static function create_event($name, $userid) {
$function = "tool_apisiteadmins\\event\\$name";
$function::create(array("relateduserid" => $userid))->trigger();
}
/**
* Applies the changes on the site.
*
* @return array List of administrators
*/
private static function get_list() {
$config = get_config("core", "siteadmins");
$result = array();
foreach (explode(",", $config) as $id) {
$id = (int)$id;
if (!empty($id)) {
$result[$id] = $id;
}
}
return $result;
}
/**
* Applies the changes on the site.
*
* @param array $admins List of administrators
*/
private static function save_changes($admins) {
if (empty($admins)) {
$admins = self::get_list();
}
return set_config("siteadmins", implode(",", $admins));
}
}
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