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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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namespace mod_qbank\task;
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use core\context;
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use core\task\adhoc_task;
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/**
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* Move all the question files and tags under a given question category to a new context.
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*
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* An instance of this task will be created for each category moved to a new context in
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* {@see transfer_question_categories}, allowing the heavy lifting of moving the data for each
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* question to be parallelised.
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*
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* @package mod_qbank
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* @copyright 2025 onwards Catalyst IT EU {@link https://catalyst-eu.net}
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* @author Mark Johnson <mark.johnson@catalyst-eu.net>
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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 transfer_questions extends adhoc_task {
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/**
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* Find the questions in the category, move their files and tags to the new context.
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*
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* @return void
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*/
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public function execute() {
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global $DB, $CFG;
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require_once($CFG->dirroot . '/question/engine/lib.php');
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$data = $this->get_custom_data();
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$newcontextid = $DB->get_field('question_categories', 'contextid', ['id' => $data->categoryid]);
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if (!$newcontextid) {
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mtrace("Could not find a category record for id {$data->categoryid}. Terminating task.");
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return;
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}
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$newcontext = context::instance_by_id($newcontextid);
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$sql = "SELECT q.id, q.qtype
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FROM {question} q
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JOIN {question_versions} qv ON qv.questionid = q.id
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JOIN {question_bank_entries} qbe ON qbe.id = qv.questionbankentryid
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WHERE qbe.questioncategoryid = ?";
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$questions = $DB->get_records_sql($sql, [$data->categoryid]);
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$questioncount = count($questions);
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mtrace("Moving files and tags for {$questioncount} questions in category {$data->categoryid}.");
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$transaction = $DB->start_delegated_transaction();
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foreach ($questions as $question) {
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\question_bank::get_qtype($question->qtype, false)->move_files($question->id, $data->contextid, $newcontext->id);
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// Purge this question from the cache.
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\question_bank::notify_question_edited($question->id);
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}
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question_move_question_tags_to_new_context($questions, $newcontext);
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$transaction->allow_commit();
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}
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}
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