mirror of
https://github.com/moodle/moodle.git
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f59f85717e
Thanks to sam marshall for giving my the idea of using a subquery to make the SQL work on all DBs.
134 lines
5.1 KiB
PHP
134 lines
5.1 KiB
PHP
<?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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* Library code used by quiz cron.
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*
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* @package mod_quiz
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* @copyright 2012 the Open University
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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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defined('MOODLE_INTERNAL') || die();
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require_once($CFG->dirroot . '/mod/quiz/locallib.php');
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/**
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* This class holds all the code for automatically updating all attempts that have
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* gone over their time limit.
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*
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* @copyright 2012 the Open University
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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 mod_quiz_overdue_attempt_updater {
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/**
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* Do the processing required.
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* @param int $timenow the time to consider as 'now' during the processing.
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* @param int $processfrom the value of $processupto the last time update_overdue_attempts was
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* called called and completed successfully.
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* @param int $processto only process attempt modifed longer ago than this.
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*/
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public function update_overdue_attempts($timenow, $processfrom, $processto) {
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global $DB;
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$attemptstoprocess = $this->get_list_of_overdue_attempts($processfrom, $processto);
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$course = null;
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$quiz = null;
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$cm = null;
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foreach ($attemptstoprocess as $attempt) {
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// If we have moved on to a different quiz, fetch the new data.
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if (!$quiz || $attempt->quiz != $quiz->id) {
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$quiz = $DB->get_record('quiz', array('id' => $attempt->quiz), '*', MUST_EXIST);
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$cm = get_coursemodule_from_instance('quiz', $attempt->quiz);
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}
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// If we have moved on to a different course, fetch the new data.
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if (!$course || $course->id != $quiz->course) {
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$course = $DB->get_record('course', array('id' => $quiz->course), '*', MUST_EXIST);
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}
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// Make a specialised version of the quiz settings, with the relevant overrides.
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$quizforuser = clone($quiz);
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$quizforuser->timeclose = $attempt->usertimeclose;
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$quizforuser->timelimit = $attempt->usertimelimit;
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// Trigger any transitions that are required.
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$attemptobj = new quiz_attempt($attempt, $quizforuser, $cm, $course);
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$attemptobj->handle_if_time_expired($timenow, false);
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}
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$attemptstoprocess->close();
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}
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/**
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* @return moodle_recordset of quiz_attempts that need to be processed because time has
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* passed. The array is sorted by courseid then quizid.
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*/
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protected function get_list_of_overdue_attempts($processfrom, $processto) {
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global $DB;
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// This query should have all the quiz_attempts columns.
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return $DB->get_recordset_sql("
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SELECT quiza.*,
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group_by_results.usertimeclose,
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group_by_results.usertimelimit
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FROM (
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SELECT iquiza.id AS attemptid,
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quiz.course,
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quiz.graceperiod,
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COALESCE(quo.timeclose, MAX(qgo.timeclose), quiz.timeclose) AS usertimeclose,
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COALESCE(quo.timelimit, MAX(qgo.timelimit), quiz.timelimit) AS usertimelimit
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FROM {quiz_attempts} iquiza
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JOIN {quiz} quiz ON quiz.id = iquiza.quiz
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LEFT JOIN {quiz_overrides} quo ON quo.quiz = quiz.id AND quo.userid = iquiza.userid
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LEFT JOIN {quiz_overrides} qgo ON qgo.quiz = quiz.id
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LEFT JOIN {groups_members} gm ON gm.userid = iquiza.userid AND gm.groupid = qgo.groupid
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WHERE iquiza.state IN ('inprogress', 'overdue')
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AND iquiza.timemodified >= :processfrom
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AND iquiza.timemodified < :processto
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GROUP BY iquiza.id,
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quiz.course,
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quiz.timeclose,
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quiz.timelimit,
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quiz.graceperiod,
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quo.timeclose,
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quo.timelimit
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) group_by_results
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JOIN {quiz_attempts} quiza ON quiza.id = group_by_results.attemptid
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WHERE (state = 'inprogress' AND (:timenow1 > usertimeclose OR
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:timenow2 > quiza.timestart + usertimelimit))
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OR (state = 'overdue' AND (:timenow3 > graceperiod + usertimeclose OR
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:timenow4 > graceperiod + quiza.timestart + usertimelimit))
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ORDER BY course, quiz",
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array('processfrom' => $processfrom, 'processto' => $processto,
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'timenow1' => $processto, 'timenow2' => $processto,
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'timenow3' => $processto, 'timenow4' => $processto));
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}
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}
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