<?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.
    return true;
>     // Put any upgrade step following this.
}
> 
>     if ($oldversion < 2020110901) {
>         // 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');
>     }
>