<?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/>.

/**
 * Upgrade code for the feedback_editpdf module.
 *
 * @package   assignfeedback_editpdf
 * @copyright 2013 Jerome Mouneyrac
 * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

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

/**
 * EditPDF upgrade code
 * @param int $oldversion
 * @return bool
 */
function xmldb_assignfeedback_editpdf_upgrade($oldversion) {
    global $CFG, $DB;

    $dbman = $DB->get_manager();


<     // Automatically generated Moodle v3.5.0 release upgrade line.
<     // Put any upgrade step following this.
< 
<     if ($oldversion < 2018051401) {
<         $table = new xmldb_table('assignfeedback_editpdf_queue');
<         $field = new xmldb_field('attemptedconversions', XMLDB_TYPE_INTEGER, '10', null,
<             XMLDB_NOTNULL, null, 0, 'submissionattempt');
< 
<         if (!$dbman->field_exists($table, $field)) {
<             $dbman->add_field($table, $field);
<         }
< 
<         // Attempts are removed from the queue after being processed, a duplicate row won't achieve anything productive.
<         // So look for any duplicates and remove them so we can add a unique key.
<         $sql = "SELECT MIN(id) as minid, submissionid, submissionattempt
<                 FROM {assignfeedback_editpdf_queue}
<                 GROUP BY submissionid, submissionattempt
<                 HAVING COUNT(id) > 1";
< 
<         if ($duplicatedrows = $DB->get_recordset_sql($sql)) {
<             foreach ($duplicatedrows as $row) {
<                 $DB->delete_records_select('assignfeedback_editpdf_queue',
<                     'submissionid = :submissionid AND submissionattempt = :submissionattempt AND id <> :minid', (array)$row);
<             }
<         }
<         $duplicatedrows->close();
< 
<         // Define key submissionid-submissionattempt to be added to assignfeedback_editpdf_queue.
<         $table = new xmldb_table('assignfeedback_editpdf_queue');
<         $key = new xmldb_key('submissionid-submissionattempt', XMLDB_KEY_UNIQUE, ['submissionid', 'submissionattempt']);
< 
<         $dbman->add_key($table, $key);
< 
<         upgrade_plugin_savepoint(true, 2018051401, 'assignfeedback', 'editpdf');
<     }
< 


    // Automatically generated Moodle v3.6.0 release upgrade line.
    // Put any upgrade step following this.

    if ($oldversion < 2019010800) {
        // Define table assignfeedback_editpdf_rot to be created.
        $table = new xmldb_table('assignfeedback_editpdf_rot');

        // Adding fields to table assignfeedback_editpdf_rot.
        $table->add_field('id', XMLDB_TYPE_INTEGER, '10', null, XMLDB_NOTNULL, XMLDB_SEQUENCE, null);
        $table->add_field('gradeid', XMLDB_TYPE_INTEGER, '10', null, XMLDB_NOTNULL, null, '0');
        $table->add_field('pageno', XMLDB_TYPE_INTEGER, '10', null, XMLDB_NOTNULL, null, '0');
        $table->add_field('pathnamehash', XMLDB_TYPE_TEXT, null, null, XMLDB_NOTNULL, null, null);
        $table->add_field('isrotated', XMLDB_TYPE_INTEGER, '1', null, XMLDB_NOTNULL, null, '0');
        $table->add_field('degree', XMLDB_TYPE_INTEGER, '10', null, XMLDB_NOTNULL, null, '0');

        // Adding keys to table assignfeedback_editpdf_rot.
        $table->add_key('primary', XMLDB_KEY_PRIMARY, ['id']);
        $table->add_key('gradeid', XMLDB_KEY_FOREIGN, ['gradeid'], 'assign_grades', ['id']);

        // Adding indexes to table assignfeedback_editpdf_rot.
        $table->add_index('gradeid_pageno', XMLDB_INDEX_UNIQUE, ['gradeid', 'pageno']);

        // Conditionally launch create table for assignfeedback_editpdf_rot.
        if (!$dbman->table_exists($table)) {
            $dbman->create_table($table);
        }

        // Editpdf savepoint reached.
        upgrade_plugin_savepoint(true, 2019010800, 'assignfeedback', 'editpdf');
    }

    // Automatically generated Moodle v3.7.0 release upgrade line.
    // Put any upgrade step following this.

    // Automatically generated Moodle v3.8.0 release upgrade line.
    // Put any upgrade step following this.

    // Automatically generated Moodle v3.9.0 release upgrade line.
    // Put any upgrade step following this.

    // Automatically generated Moodle v3.10.0 release upgrade line.
    // Put any upgrade step following this.


<     if ($oldversion < 2020110901) {



>     // Automatically generated Moodle v3.11.0 release upgrade line.
>     // Put any upgrade step following this.
> 
>     if ($oldversion < 2021051701) {


        // Remove submissions from the processing queue that have been processed.
        $sql = 'DELETE
                  FROM {assignfeedback_editpdf_queue}
                 WHERE EXISTS (SELECT 1
                                 FROM {assign_submission} s,
                                      {assign_grades} g
                                WHERE s.id = submissionid
                                  AND s.assignment = g.assignment
                                  AND s.userid = g.userid
                                  AND s.attemptnumber = g.attemptnumber)';

        $DB->execute($sql);

        // Editpdf savepoint reached.

<         upgrade_plugin_savepoint(true, 2020110901, 'assignfeedback', 'editpdf');



>         upgrade_plugin_savepoint(true, 2021051701, 'assignfeedback', 'editpdf');
>     }
> 
>     if ($oldversion < 2021051702) {
>         // Conversion records need to be removed in order for conversions to restart.
>         $DB->delete_records('file_conversion');
> 
>         // Schedule an adhoc task to fix existing stale conversions.
>         $task = new \assignfeedback_editpdf\task\bump_submission_for_stale_conversions();
>         \core\task\manager::queue_adhoc_task($task);
> 
>         upgrade_plugin_savepoint(true, 2021051702, 'assignfeedback', 'editpdf');


    }

    return true;
}