<?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/>.

/**
 * Multiple choice question type upgrade code.
 *
 * @package    qtype
 * @subpackage multichoice
 * @copyright  1999 onwards Martin Dougiamas {@link http://moodle.com}
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

defined('MOODLE_INTERNAL') || die();

/**
 * Upgrade code for the multiple choice question type.
 * @param int $oldversion the version we are upgrading from.
 */
function xmldb_qtype_multichoice_upgrade($oldversion) {

<     global $CFG, $DB;



>     global $CFG;




<     $dbman = $DB->get_manager();
< 
<     // Automatically generated Moodle v3.6.0 release upgrade line.



>     // Automatically generated Moodle v3.9.0 release upgrade line.


    // Put any upgrade step following this.


<     // Automatically generated Moodle v3.7.0 release upgrade line.



>     // Automatically generated Moodle v4.0.0 release upgrade line.


    // Put any upgrade step following this.


<     // Automatically generated Moodle v3.8.0 release upgrade line.



>     // Automatically generated Moodle v4.1.0 release upgrade line.


    // Put any upgrade step following this.


<     // Add a new checkbox for the question author to decide
<     // Whether standard instruction ('Select one:' or 'Select one or more:') is displayed.
<     $newversion = 2020041600;
<     if ($oldversion < $newversion) {
< 
<         // Define field showstandardinstruction to be added to qtype_multichoice_options.
<         $table = new xmldb_table('qtype_multichoice_options');
<         $field = new xmldb_field('showstandardinstruction', XMLDB_TYPE_INTEGER, '2',
<             null, XMLDB_NOTNULL, null, '1', 'shownumcorrect');
< 
<         // Conditionally launch add field showstandardinstruction.
<         if (!$dbman->field_exists($table, $field)) {
<             $dbman->add_field($table, $field);
<         }
< 
<         // Multichoice savepoint reached.
<         upgrade_plugin_savepoint(true, $newversion, 'qtype', 'multichoice');
<     }
<     // Automatically generated Moodle v3.9.0 release upgrade line.



>     // Automatically generated Moodle v4.2.0 release upgrade line.


    // Put any upgrade step following this.


<     // Automatically generated Moodle v4.0.0 release upgrade line.



>     // Automatically generated Moodle v4.3.0 release upgrade line.


    // Put any upgrade step following this.

    return true;
}