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moodle/mod/quiz/attempt.php

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<?php // $Id$
/**
* This page prints a particular instance of quiz
*
* @version $Id$
* @author Martin Dougiamas and many others. This has recently been completely
* rewritten by Alex Smith, Julian Sedding and Gustav Delius as part of
* the Serving Mathematics project
* {@link http://maths.york.ac.uk/serving_maths}
* @license http://www.gnu.org/copyleft/gpl.html GNU Public License
* @package quiz
*/
require_once("../../config.php");
require_once("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)
$timestamp = time();
// Get submitted parameters.
$id = optional_param('id', 0, PARAM_INT); // Course Module ID
$q = optional_param('q', 0, PARAM_INT); // or quiz ID
$page = optional_param('page', 0, PARAM_INT);
$questionids = optional_param('questionids', '');
$finishattempt = optional_param('finishattempt', 0, PARAM_BOOL);
$timeup = optional_param('timeup', 0, PARAM_BOOL); // True if form was submitted by timer.
$forcenew = optional_param('forcenew', false, PARAM_BOOL); // Teacher has requested new preview
if ($id) {
if (! $cm = get_coursemodule_from_id('quiz', $id)) {
error("There is no coursemodule with id $id");
}
if (! $course = get_record("course", "id", $cm->course)) {
error("Course is misconfigured");
}
if (! $quiz = get_record("quiz", "id", $cm->instance)) {
error("The quiz with id $cm->instance corresponding to this coursemodule $id is missing");
}
} else {
if (! $quiz = get_record("quiz", "id", $q)) {
error("There is no quiz with id $q");
}
if (! $course = get_record("course", "id", $quiz->course)) {
error("The course with id $quiz->course that the quiz with id $q belongs to is missing");
}
if (! $cm = get_coursemodule_from_instance("quiz", $quiz->id, $course->id)) {
error("The course module for the quiz with id $q is missing");
}
}
// We treat automatically closed attempts just like normally closed attempts
if ($timeup) {
$finishattempt = 1;
}
require_login($course->id, false, $cm);
$coursecontext = get_context_instance(CONTEXT_COURSE, $cm->course); // course context
$context = get_context_instance(CONTEXT_MODULE, $cm->id);
$ispreviewing = has_capability('mod/quiz:preview', $context);
// if no questions have been set up yet redirect to edit.php
if (!$quiz->questions and has_capability('mod/quiz:manage', $context)) {
redirect($CFG->wwwroot . '/mod/quiz/edit.php?quizid=' . $quiz->id);
}
if (!$ispreviewing) {
require_capability('mod/quiz:attempt', $context);
}
/// Get number for the next or unfinished attempt
if(!$attemptnumber = (int)get_field_sql('SELECT MAX(attempt)+1 FROM ' .
"{$CFG->prefix}quiz_attempts WHERE quiz = '{$quiz->id}' AND " .
"userid = '{$USER->id}' AND timefinish > 0 AND preview != 1")) {
$attemptnumber = 1;
}
$strattemptnum = get_string('attempt', 'quiz', $attemptnumber);
$strquizzes = get_string("modulenameplural", "quiz");
$popup = $quiz->popup && !$ispreviewing; // Controls whether this is shown in a javascript-protected window.
/// Check number of attempts
$numberofpreviousattempts = count_records_select('quiz_attempts', "quiz = '{$quiz->id}' AND " .
"userid = '{$USER->id}' AND timefinish > 0 AND preview != 1");
if ($quiz->attempts and $numberofpreviousattempts >= $quiz->attempts) {
error(get_string('nomoreattempts', 'quiz'), "view.php?id={$cm->id}");
}
/// Check subnet access
if ($quiz->subnet and !address_in_subnet(getremoteaddr(), $quiz->subnet)) {
if ($ispreviewing) {
notify(get_string('subnetnotice', 'quiz'));
} else {
error(get_string("subneterror", "quiz"), "view.php?id=$cm->id");
}
}
/// Check password access
if ($ispreviewing && $forcenew) {
unset($SESSION->passwordcheckedquizzes[$quiz->id]);
}
if ($quiz->password and empty($SESSION->passwordcheckedquizzes[$quiz->id])) {
$enteredpassword = optional_param('quizpassword', '', PARAM_RAW);
if (optional_param('cancelpassword', false)) {
// User clicked cancel in the password form.
redirect($CFG->wwwroot . '/mod/quiz/view.php?q=' . $quiz->id);
} else if (strcmp($quiz->password, $enteredpassword) === 0) {
// User entered the correct password.
$SESSION->passwordcheckedquizzes[$quiz->id] = true;
} else {
// User entered the wrong password, or has not entered one yet.
$url = $CFG->wwwroot . '/mod/quiz/attempt.php?q=' . $quiz->id;
if (empty($popup)) {
print_header('', '', '', 'quizpassword');
}
if (trim(strip_tags($quiz->intro))) {
$formatoptions->noclean = true;
print_box(format_text($quiz->intro, FORMAT_MOODLE, $formatoptions), 'generalbox', 'intro');
}
print_box_start('generalbox', 'passwordbox');
if (!empty($enteredpassword)) {
echo '<p class="notifyproblem">', get_string('passworderror', 'quiz'), '</p>';
}
?>
<p><?php print_string('requirepasswordmessage', 'quiz'); ?></p>
<form id="passwordform" method="post" action="<?php echo $url; ?>" onclick="this.autocomplete='off'">
<div>
<label for="quizpassword"><?php print_string('password'); ?></label>
<input name="quizpassword" id="quizpassword" type="password" value=""/>
<input type="submit" value="<?php print_string('ok'); ?>" />
<input type="submit" name="cancelpassword" value="<?php print_string('cancel'); ?>" />
</div>
</form>
<?php
print_box_end();
if (empty($popup)) {
print_footer();
}
exit;
}
}
if ($quiz->delay1 or $quiz->delay2) {
//quiz enforced time delay
if ($attempts = quiz_get_user_attempts($quiz->id, $USER->id)) {
$numattempts = count($attempts);
} else {
$numattempts = 0;
}
$timenow = time();
$lastattempt_obj = get_record_select('quiz_attempts', "quiz = $quiz->id AND attempt = $numattempts AND userid = $USER->id", 'timefinish');
if ($lastattempt_obj) {
$lastattempt = $lastattempt_obj->timefinish;
}
if ($numattempts == 1 && $quiz->delay1) {
if ($timenow - $quiz->delay1 < $lastattempt) {
error(get_string('timedelay', 'quiz'), 'view.php?q='.$quiz->id);
}
} else if($numattempts > 1 && $quiz->delay2) {
if ($timenow - $quiz->delay2 < $lastattempt) {
error(get_string('timedelay', 'quiz'), 'view.php?q='.$quiz->id);
}
}
}
/// Load attempt or create a new attempt if there is no unfinished one
if ($ispreviewing and $forcenew) { // teacher wants a new preview
// so we set a finish time on the current attempt (if any).
// It will then automatically be deleted below
set_field('quiz_attempts', 'timefinish', $timestamp, 'quiz', $quiz->id, 'userid', $USER->id);
}
$attempt = quiz_get_user_attempt_unfinished($quiz->id, $USER->id);
$newattempt = false;
if (!$attempt) {
// Delete any previous preview attempts belonging to this user.
if ($oldattempts = get_records_select('quiz_attempts', "quiz = '$quiz->id'
AND userid = '$USER->id' AND preview = 1")) {
foreach ($oldattempts as $oldattempt) {
quiz_delete_attempt($oldattempt, $quiz);
}
}
$newattempt = true;
// Start a new attempt and initialize the question sessions
$attempt = quiz_create_attempt($quiz, $attemptnumber);
// If this is an attempt by a teacher mark it as a preview
if ($ispreviewing) {
$attempt->preview = 1;
}
// Save the attempt
if (!$attempt->id = insert_record('quiz_attempts', $attempt)) {
error('Could not create new attempt');
}
// make log entries
if ($ispreviewing) {
add_to_log($course->id, 'quiz', 'preview',
"attempt.php?id=$cm->id",
"$quiz->id", $cm->id);
} else {
add_to_log($course->id, 'quiz', 'attempt',
"review.php?attempt=$attempt->id",
"$quiz->id", $cm->id);
}
} else {
// log continuation of attempt only if some time has lapsed
if (($timestamp - $attempt->timemodified) > 600) { // 10 minutes have elapsed
add_to_log($course->id, 'quiz', 'continue attemp', // this action used to be called 'continue attempt' but the database field has only 15 characters
"review.php?attempt=$attempt->id",
"$quiz->id", $cm->id);
}
}
if (!$attempt->timestart) { // shouldn't really happen, just for robustness
debugging('timestart was not set for this attempt. That should be impossible.', DEBUG_DEVELOPER);
$attempt->timestart = $timestamp - 1;
}
/// Load all the questions and states needed by this script
// list of questions needed by page
$pagelist = quiz_questions_on_page($attempt->layout, $page);
if ($newattempt) {
$questionlist = quiz_questions_in_quiz($attempt->layout);
} else {
$questionlist = $pagelist;
}
// add all questions that are on the submitted form
if ($questionids) {
$questionlist .= ','.$questionids;
}
if (!$questionlist) {
error(get_string('noquestionsfound', 'quiz'), 'view.php?q='.$quiz->id);
}
$sql = "SELECT q.*, i.grade AS maxgrade, i.id AS instance".
" FROM {$CFG->prefix}question q,".
" {$CFG->prefix}quiz_question_instances i".
" WHERE i.quiz = '$quiz->id' AND q.id = i.question".
" AND q.id IN ($questionlist)";
// Load the questions
if (!$questions = get_records_sql($sql)) {
error(get_string('noquestionsfound', 'quiz'), 'view.php?q='.$quiz->id);
}
// Load the question type specific information
if (!get_question_options($questions)) {
error('Could not load question options');
}
// If the new attempt is to be based on a previous attempt find its id
$lastattemptid = false;
if ($newattempt and $attempt->attempt > 1 and $quiz->attemptonlast and !$attempt->preview) {
// Find the previous attempt
if (!$lastattemptid = get_field('quiz_attempts', 'uniqueid', 'quiz', $attempt->quiz, 'userid', $attempt->userid, 'attempt', $attempt->attempt-1)) {
error('Could not find previous attempt to build on');
}
}
// Restore the question sessions to their most recent states
// creating new sessions where required
if (!$states = get_question_states($questions, $quiz, $attempt, $lastattemptid)) {
error('Could not restore question sessions');
}
// Save all the newly created states
if ($newattempt) {
foreach ($questions as $i => $question) {
save_question_session($questions[$i], $states[$i]);
}
}
/// Process form data /////////////////////////////////////////////////
if ($responses = data_submitted() and empty($_POST['quizpassword'])) {
// set the default event. This can be overruled by individual buttons.
$event = (array_key_exists('markall', $responses)) ? QUESTION_EVENTSUBMIT :
($finishattempt ? QUESTION_EVENTCLOSE : QUESTION_EVENTSAVE);
// Unset any variables we know are not responses
unset($responses->id);
unset($responses->q);
unset($responses->oldpage);
unset($responses->newpage);
unset($responses->review);
unset($responses->questionids);
unset($responses->saveattempt); // responses get saved anway
unset($responses->finishattempt); // same as $finishattempt
unset($responses->markall);
unset($responses->forcenewattempt);
// extract responses
// $actions is an array indexed by the questions ids
$actions = question_extract_responses($questions, $responses, $event);
// Process each question in turn
$questionidarray = explode(',', $questionids);
foreach($questionidarray as $i) {
if (!isset($actions[$i])) {
$actions[$i]->responses = array('' => '');
$actions[$i]->event = QUESTION_EVENTOPEN;
}
$actions[$i]->timestamp = $timestamp;
question_process_responses($questions[$i], $states[$i], $actions[$i], $quiz, $attempt);
save_question_session($questions[$i], $states[$i]);
}
$attempt->timemodified = $timestamp;
// We have now finished processing form data
}
/// Finish attempt if requested
if ($finishattempt) {
// Set the attempt to be finished
$attempt->timefinish = $timestamp;
// load all the questions
$closequestionlist = quiz_questions_in_quiz($attempt->layout);
$sql = "SELECT q.*, i.grade AS maxgrade, i.id AS instance".
" FROM {$CFG->prefix}question q,".
" {$CFG->prefix}quiz_question_instances i".
" WHERE i.quiz = '$quiz->id' AND q.id = i.question".
" AND q.id IN ($closequestionlist)";
if (!$closequestions = get_records_sql($sql)) {
error('Questions missing');
}
// Load the question type specific information
if (!get_question_options($closequestions)) {
error('Could not load question options');
}
// Restore the question sessions
if (!$closestates = get_question_states($closequestions, $quiz, $attempt)) {
error('Could not restore question sessions');
}
foreach($closequestions as $key => $question) {
$action->event = QUESTION_EVENTCLOSE;
$action->responses = $closestates[$key]->responses;
$action->timestamp = $closestates[$key]->timestamp;
question_process_responses($question, $closestates[$key], $action, $quiz, $attempt);
save_question_session($question, $closestates[$key]);
}
add_to_log($course->id, 'quiz', 'close attempt',
"review.php?attempt=$attempt->id",
"$quiz->id", $cm->id);
}
/// Update the quiz attempt and the overall grade for the quiz
if ($responses || $finishattempt) {
if (!update_record('quiz_attempts', $attempt)) {
error('Failed to save the current quiz attempt!');
}
if (($attempt->attempt > 1 || $attempt->timefinish > 0) and !$attempt->preview) {
quiz_save_best_grade($quiz);
}
}
/// Send emails to those who have the capability set
if ($finishattempt && !$attempt->preview) {
quiz_send_notification_emails($course, $quiz, $attempt, $context, $cm);
}
/// Check access to quiz page
// check the quiz times
if ($timestamp < $quiz->timeopen || ($quiz->timeclose and $timestamp > $quiz->timeclose)) {
if ($ispreviewing) {
notify(get_string('notavailabletostudents', 'quiz'));
} else {
notice(get_string('notavailable', 'quiz'), "view.php?id={$cm->id}");
}
}
if ($finishattempt) {
if (!empty($SESSION->passwordcheckedquizzes[$quiz->id])) {
unset($SESSION->passwordcheckedquizzes[$quiz->id]);
}
redirect($CFG->wwwroot . '/mod/quiz/review.php?attempt='.$attempt->id, 0);
}
/// Print the quiz page ////////////////////////////////////////////////////////
// Print the page header
require_js($CFG->wwwroot . '/mod/quiz/quiz.js');
$pagequestions = explode(',', $pagelist);
$headtags = get_html_head_contributions($pagequestions, $questions, $states);
if (!empty($popup)) {
define('MESSAGE_WINDOW', true); // This prevents the message window coming up
print_header($course->shortname.': '.format_string($quiz->name), '', '', '', $headtags, false, '', '', false, '');
include('protect_js.php');
} else {
$strupdatemodule = has_capability('moodle/course:manageactivities', $coursecontext)
? update_module_button($cm->id, $course->id, get_string('modulename', 'quiz'))
: "";
$navigation = build_navigation($strattemptnum, $cm);
print_header_simple(format_string($quiz->name), "", $navigation, "", $headtags, true, $strupdatemodule);
}
echo '<div id="overDiv" style="position:absolute; visibility:hidden; z-index:1000;"></div>'; // for overlib
// Print the quiz name heading and tabs for teacher, etc.
if ($ispreviewing) {
$currenttab = 'preview';
include('tabs.php');
print_heading(get_string('previewquiz', 'quiz', format_string($quiz->name)));
unset($buttonoptions);
$buttonoptions['q'] = $quiz->id;
$buttonoptions['forcenew'] = true;
print_single_button($CFG->wwwroot.'/mod/quiz/attempt.php', $buttonoptions, get_string('startagain', 'quiz'));
if ($quiz->popup) {
notify(get_string('popupnotice', 'quiz'));
}
} else {
if ($quiz->attempts != 1) {
print_heading(format_string($quiz->name).' - '.$strattemptnum);
} else {
print_heading(format_string($quiz->name));
}
}
// Start the form
echo '<form id="responseform" method="post" action="attempt.php?q=', s($quiz->id), '&amp;page=', s($page),
'" enctype="multipart/form-data"' .
' onclick="this.autocomplete=\'off\'" onkeypress="return check_enter(event);">', "\n";
if($quiz->timelimit > 0) {
// Make sure javascript is enabled for time limited quizzes
?>
<script type="text/javascript">
// Do nothing, but you have to have a script tag before a noscript tag.
</script>
<noscript>
<div>
<?php print_heading(get_string('noscript', 'quiz')); ?>
</div>
</noscript>
<?php
}
echo '<div>';
/// Print the navigation panel if required
$numpages = quiz_number_of_pages($attempt->layout);
if ($numpages > 1) {
quiz_print_navigation_panel($page, $numpages);
}
/// Print all the questions
$number = quiz_first_questionnumber($attempt->layout, $pagelist);
foreach ($pagequestions as $i) {
$options = quiz_get_renderoptions($quiz->review, $states[$i]);
// Print the question
print_question($questions[$i], $states[$i], $number, $quiz, $options);
save_question_session($questions[$i], $states[$i]);
$number += $questions[$i]->length;
}
/// Print the submit buttons
$strconfirmattempt = addslashes(get_string("confirmclose", "quiz"));
$onclick = "return confirm('$strconfirmattempt')";
echo "<div class=\"submitbtns mdl-align\">\n";
echo "<input type=\"submit\" name=\"saveattempt\" value=\"".get_string("savenosubmit", "quiz")."\" />\n";
if ($quiz->optionflags & QUESTION_ADAPTIVE) {
echo "<input type=\"submit\" name=\"markall\" value=\"".get_string("markall", "quiz")."\" />\n";
}
echo "<input type=\"submit\" name=\"finishattempt\" value=\"".get_string("finishattempt", "quiz")."\" onclick=\"$onclick\" />\n";
echo "</div>";
// Print the navigation panel if required
if ($numpages > 1) {
quiz_print_navigation_panel($page, $numpages);
}
// Finish the form
echo '</div>';
echo '<input type="hidden" name="timeup" id="timeup" value="0" />';
// Add a hidden field with questionids. Do this at the end of the form, so
// if you navigate before the form has finished loading, it does not wipe all
// the student's answers.
echo '<input type="hidden" name="questionids" value="'.$pagelist."\" />\n";
echo "</form>\n";
// If the quiz has a time limit, or if we are close to the close time, include a floating timer.
$showtimer = false;
$timerstartvalue = 999999999999;
if ($quiz->timeclose) {
$timerstartvalue = min($timerstartvalue, $quiz->timeclose - time());
$showtimer = $timerstartvalue < 60*60; // Show the timer if we are less than 60 mins from the deadline.
}
if ($quiz->timelimit > 0 && !has_capability('mod/quiz:ignoretimelimits', $context, NULL, false)) {
$timerstartvalue = min($timerstartvalue, $attempt->timestart + $quiz->timelimit*60- time());
$showtimer = true;
}
if ($showtimer && (!$ispreviewing || $timerstartvalue > 0)) {
$timerstartvalue = max($timerstartvalue, 1); // Make sure it starts just above zero.
require('jstimer.php');
}
// Finish the page
if (empty($popup)) {
print_footer($course);
}
?>
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