Current File : /home/vacivi36/ava/mod/quiz/report/statistics/classes/task/recalculate.php
<?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/>.
namespace quiz_statistics\task;
use core\dml\sql_join;
use quiz_attempt;
use quiz;
use quiz_statistics_report;
defined('MOODLE_INTERNAL') || die();
require_once($CFG->dirroot . '/mod/quiz/locallib.php');
require_once($CFG->dirroot . '/mod/quiz/report/statistics/statisticslib.php');
require_once($CFG->dirroot . '/mod/quiz/report/reportlib.php');
require_once($CFG->dirroot . '/mod/quiz/report/statistics/report.php');
/**
* Re-calculate question statistics.
*
* @package quiz_statistics
* @copyright 2022 Catalyst IT Australia Pty Ltd
* @author Nathan Nguyen <nathannguyen@catalyst-au.net>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class recalculate extends \core\task\scheduled_task {
/** @var int the maximum length of time one instance of this task will run. */
const TIME_LIMIT = 3600;
public function get_name(): string {
return get_string('recalculatetask', 'quiz_statistics');
}
public function execute(): void {
global $DB;
$stoptime = time() + self::TIME_LIMIT;
$dateformat = get_string('strftimedatetimeshortaccurate', 'core_langconfig');
// TODO: MDL-75197, add quizid in quiz_statistics so that it is simpler to find quizzes for stats calculation.
// Only calculate stats for quizzes which have recently finished attempt.
$latestattempts = $DB->get_records_sql("
SELECT q.id AS quizid,
q.name AS quizname,
q.grademethod AS quizgrademethod,
c.id AS courseid,
c.shortname AS courseshortname,
MAX(quiza.timefinish) AS mostrecentattempttime,
COUNT(1) AS numberofattempts
FROM {quiz_attempts} quiza
JOIN {quiz} q ON q.id = quiza.quiz
JOIN {course} c ON c.id = q.course
WHERE quiza.preview = 0
AND quiza.state = :quizstatefinished
GROUP BY q.id, q.name, q.grademethod, c.id, c.shortname
ORDER BY MAX(quiza.timefinish) DESC
", ["quizstatefinished" => quiz_attempt::FINISHED]);
$anyexception = null;
foreach ($latestattempts as $latestattempt) {
if (time() >= $stoptime) {
mtrace("This task has been running for more than " .
format_time(self::TIME_LIMIT) . " so stopping this execution.");
break;
}
// Check if there is any existing question stats, and it has been calculated after latest quiz attempt.
$qubaids = quiz_statistics_qubaids_condition($latestattempt->quizid,
new sql_join(), $latestattempt->quizgrademethod);
$lateststatstime = $DB->get_field('quiz_statistics', 'COALESCE(MAX(timemodified), 0)',
['hashcode' => $qubaids->get_hash_code()]);
$quizinfo = "'$latestattempt->quizname' ($latestattempt->quizid) in course " .
"$latestattempt->courseshortname ($latestattempt->courseid) has most recent attempt finished at " .
userdate($latestattempt->mostrecentattempttime, $dateformat);
if ($lateststatstime) {
$quizinfo .= " and statistics from " . userdate($lateststatstime, $dateformat);
}
if ($lateststatstime >= $latestattempt->mostrecentattempttime) {
mtrace(" " . $quizinfo . " so nothing to do.");
continue;
}
// OK, so we need to calculate for this quiz.
mtrace(" " . $quizinfo . " so re-calculating statistics for $latestattempt->numberofattempts attempts, start time " .
userdate(time(), $dateformat) . " ...");
try {
$quizobj = quiz::create($latestattempt->quizid);
$report = new quiz_statistics_report();
$report->clear_cached_data($qubaids);
$report->calculate_questions_stats_for_question_bank($quizobj->get_quizid());
mtrace(" Calculations completed at " . userdate(time(), $dateformat) . ".");
} catch (\Throwable $e) {
// We don't want an exception from one quiz to stop processing of other quizzes.
mtrace_exception($e);
$anyexception = $e;
}
}
if ($anyexception) {
// If there was any error, ensure the task fails.
throw $anyexception;
}
}
}
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