Fixes EMDL-606 EMDL-605 EMDL-604 EMDL-578

attempt.php

@@ -134,7 +134,7 @@
 
 $userid = '-u' . $USER->id;
 
-$wifisettings = $DB->get_record('quizaccess_wifiresilience', array('quizid' => $attemptobj->get_quizid()));
+$wifisettings = get_config('quizaccess_wifiresilience');
 
 $displaytecherrors = 0;
 $displaynavdetails = 0;

serviceworker.php

@@ -42,7 +42,7 @@
     die;
 }
 
-$wifisettings = $DB->get_record('quizaccess_wifiresilience', array('quizid' => $quizid));
+$wifisettings = get_config('quizaccess_wifiresilience');
 
 $rev = md5('offline.html');
 $precahcedfilesstr =

styles.css

@@ -322,5 +322,6 @@ textarea.inspectresponse {
 
 #page-mod-quiz-attempt .submitbtns {
     text-align: center !important;
+    display: block;
 }
 /* stylelint-enable declaration-no-important  */

time.php

@@ -0,0 +1,91 @@
+<?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/>.
+
+/**
+ * This script processes ajax timer equests during the quiz.
+ *
+ * @package   quizaccess_wifiresilience
+ * @copyright 2017 ETH Zurich ([email protected])
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+define('AJAX_SCRIPT', true);
+
+require_once(__DIR__ . '/../../../../config.php');
+require_once($CFG->dirroot . '/mod/quiz/locallib.php');
+
+// Remember the current time as the time any responses were submitted.
+// (so as to make sure students don't get penalized for slow processing on this page).
+$timenow = time();
+
+// Get submitted parameters.
+$attemptid = required_param('attempt',  PARAM_INT);
+
+$transaction = $DB->start_delegated_transaction();
+$attemptobj = quiz_attempt::create($attemptid);
+
+// Check login.
+if (!isloggedin() || !confirm_sesskey()) {
+    echo json_encode(array('result' => 'lostsession'));
+    die;
+}
+require_login($attemptobj->get_course(), false, $attemptobj->get_cm());
+require_sesskey();
+
+// Check that this attempt belongs to this user.
+if ($attemptobj->get_userid() != $USER->id) {
+    throw new moodle_quiz_exception($attemptobj->get_quizobj(), 'notyourattempt');
+}
+
+// Check capabilities.
+if (!$attemptobj->is_preview_user()) {
+    $attemptobj->require_capability('mod/quiz:attempt');
+}
+$options = $attemptobj->get_display_options(false);
+
+// If the attempt is already closed, send them to the review page.
+if ($attemptobj->is_finished()) {
+    throw new moodle_quiz_exception($attemptobj->get_quizobj(),
+            'attemptalreadyclosed', null, $attemptobj->review_url());
+}
+
+$accessmanager = $attemptobj->get_quizobj()->get_access_manager(time());
+$endtime = $accessmanager->get_end_time($attemptobj);
+
+if ($endtime === false) {
+    $endtime = 0;
+}
+
+$timeleft = $attemptobj->get_time_left_display(time());
+
+if ($timeleft !== false) {
+    $ispreview = $attemptobj->is_preview();
+    $timerstartvalue = $timeleft;
+    if (!$ispreview) {
+        /*
+        Make sure the timer starts just above zero. If $timeleft was <= 0, then
+        this will just have the effect of causing the quiz to be submitted immediately.
+        */
+        $timerstartvalue = max($timerstartvalue, 1);
+    }
+} else {
+    $timerstartvalue = 0;
+}
+$result = array();
+$result['result'] = 'OK';
+$result['timerstartvalue'] = $timerstartvalue;
+$result['timelimit'] = $endtime;
+echo json_encode($result);