<?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/>.

/**
 * This file keeps track of upgrades to
 * the forum module
 *
 * Sometimes, changes between versions involve
 * alterations to database structures and other
 * major things that may break installations.
 *
 * The upgrade function in this file will attempt
 * to perform all the necessary actions to upgrade
 * your older installation to the current version.
 *
 * If there's something it cannot do itself, it
 * will tell you what you need to do.
 *
 * The commands in here will all be database-neutral,
 * using the methods of database_manager class
 *
 * Please do not forget to use upgrade_set_timeout()
 * before any action that may take longer time to finish.
 *
 * @package   mod_forum
 * @copyright 2003 onwards Eloy Lafuente (stronk7) {@link http://stronk7.com}
 * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

function xmldb_forum_upgrade($oldversion) {
    global $CFG, $DB;

    $dbman = $DB->get_manager(); // Loads ddl manager and xmldb classes.

    // Automatically generated Moodle v4.1.0 release upgrade line.
    // Put any upgrade step following this.

    if ($oldversion < 2022112801) {
        // Some very old discussions from early Moodle versions may have the usermodified set to zero.
        $DB->execute("UPDATE {forum_discussions} SET usermodified = userid WHERE usermodified = 0");

        upgrade_mod_savepoint(true, 2022112801, 'forum');
    }

    // Automatically generated Moodle v4.2.0 release upgrade line.
    // Put any upgrade step following this.

    // Automatically generated Moodle v4.3.0 release upgrade line.
    // Put any upgrade step following this.

    // Automatically generated Moodle v4.4.0 release upgrade line.
    // Put any upgrade step following this.

    // Automatically generated Moodle v4.5.0 release upgrade line.
    // Put any upgrade step following this.

    return true;
}