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<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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/**
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* Cleans up orphaned feedback pdf files and table entries.
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*
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* @package assignfeedback_editpdf
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* @copyright 2022 Adrian Greeve <adrian@moodle.com>
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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namespace assignfeedback_editpdf\task;
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use core\task\adhoc_task;
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/**
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* Cleans up orphaned feedback pdf files and table entries.
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*
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* @package assignfeedback_editpdf
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* @copyright 2022 Adrian Greeve <adrian@moodle.com>
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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class remove_orphaned_editpdf_files extends adhoc_task {
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/**
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* Run the task.
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*/
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public function execute() {
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$this->remove_files_and_entries();
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$this->remove_rotated_table_entries();
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}
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/**
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* Removes edit pdf feedback files and table entries that have been orphaned.
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*/
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private function remove_files_and_entries(): void {
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global $DB;
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// Patiently remove all orphaned temporary pdf files.
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$sql = "SELECT DISTINCT f.contextid, f.component, f.filearea, f.itemid
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FROM {files} f
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LEFT JOIN {assign_grades} g ON g.id = f.itemid
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WHERE f.component = :assigneditpdf
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AND NOT (filearea = :stamps AND f.itemid = 0)
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AND g.id IS NULL";
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$params = ['assigneditpdf' => 'assignfeedback_editpdf', 'stamps' => 'stamps'];
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$results = $DB->get_recordset_sql($sql, $params);
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foreach ($results as $record) {
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$fs = get_file_storage();
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$fs->delete_area_files($record->contextid, $record->component, $record->filearea, $record->itemid);
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}
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$results->close();
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}
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/**
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* Removes orphaned entries in the feedback edit pdf rotation table.
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*/
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private function remove_rotated_table_entries(): void {
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global $DB;
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$rotatesql = "SELECT er.id AS erid
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FROM {assignfeedback_editpdf_rot} er
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LEFT JOIN {assign_grades} g ON g.id = er.gradeid
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WHERE g.id IS NULL";
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$DB->delete_records_subquery('assignfeedback_editpdf_rot', 'id', 'erid', $rotatesql);
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}
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}
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