<?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 wiki 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.
 *
 * @package mod-wiki-2.0
 * @copyrigth 2009 Marc Alier, Jordi Piguillem marc.alier@upc.edu
 * @copyrigth 2009 Universitat Politecnica de Catalunya http://www.upc.edu
 *
 * @author Jordi Piguillem
 *
 * @license http://www.gnu.org/copyleft/gpl.html GNU Public License
 *
 */

function xmldb_wiki_upgrade($oldversion) {
    global $CFG, $DB, $OUTPUT;

    $dbman = $DB->get_manager();


    // Moodle v2.2.0 release upgrade line
    // Put any upgrade step following this

    // Moodle v2.3.0 release upgrade line
    // Put any upgrade step following this

    if ($oldversion < 2012061701) {
        // Drop all legacy upgrade tables, not used anymore.

        $table = new xmldb_table('wiki_entries_old');
        if ($dbman->table_exists('wiki_entries_old')) {
            $dbman->drop_table($table);
        }

        $table = new xmldb_table('wiki_locks_old');
        if ($dbman->table_exists('wiki_locks_old')) {
            $dbman->drop_table($table);
        }

        $table = new xmldb_table('wiki_pages_old');
        if ($dbman->table_exists('wiki_pages_old')) {
            $dbman->drop_table($table);
        }

        upgrade_plugin_savepoint(true, 2012061701, 'mod', 'wiki');
    }


    // Moodle v2.4.0 release upgrade line
    // Put any upgrade step following this


    return true;
}
