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