tools/take_test.php

   1 <?php
   2 /****************************************************************/
   3 /* ATutor                                                                                                               */
   4 /****************************************************************/
   5 /* Copyright (c) 2002-2008 by Greg Gay & Joel Kronenberg        */
   6 /* Adaptive Technology Resource Centre / University of Toronto  */
   7 /* http://atutor.ca                                                                                             */
   8 /*                                                              */
   9 /* This program is free software. You can redistribute it and/or*/
  10 /* modify it under the terms of the GNU General Public License  */
  11 /* as published by the Free Software Foundation.                                */
  12 /****************************************************************/
  13 // $Id$
  14 define('AT_INCLUDE_PATH', '../include/');
  15 require(AT_INCLUDE_PATH.'vitals.inc.php');
  16 require(AT_INCLUDE_PATH.'lib/test_result_functions.inc.php');
  17 require(AT_INCLUDE_PATH.'classes/testQuestions.class.php');
  18
  19 $tid = intval($_REQUEST['tid']);
  20 if (isset($_REQUEST['gid'])) $gid = $addslashes($_REQUEST['gid']);
  21
  22 //make sure max attempts not reached, and still on going
  23 $sql            = "SELECT *, UNIX_TIMESTAMP(start_date) AS start_date, UNIX_TIMESTAMP(end_date) AS end_date FROM ".TABLE_PREFIX."tests WHERE test_id=".$tid." AND course_id=".$_SESSION['course_id'];
  24 $result= mysql_query($sql, $db);
  25 $test_row = mysql_fetch_assoc($result);
  26 /* check to make sure we can access this test: */
  27 if (!$test_row['guests'] && ($_SESSION['enroll'] == AT_ENROLL_NO || $_SESSION['enroll'] == AT_ENROLL_ALUMNUS)) {
  28         require(AT_INCLUDE_PATH.'header.inc.php');
  29         $msg->printInfos('NOT_ENROLLED');
  30
  31         require(AT_INCLUDE_PATH.'footer.inc.php');
  32         exit;
  33 }
  34
  35 if (!$test_row['guests'] && !authenticate_test($tid)) {
  36         header('Location: '.url_rewrite('tools/my_tests.php', AT_PRETTY_URL_IS_HEADER));
  37         exit;
  38 }
  39
  40 // checks one/all questions per page, and forward user to the correct one
  41 if ($test_row['display']) {
  42         header('Location: '.url_rewrite('tools/take_test_q.php?tid='.$tid, AT_PRETTY_URL_IS_HEADER));
  43 }
  44
  45 $out_of = $test_row['out_of'];
  46
  47 $sql            = "SELECT COUNT(*) AS cnt FROM ".TABLE_PREFIX."tests_results WHERE status=1 AND test_id=".$tid." AND member_id='".$_SESSION['member_id']."'";
  48 $takes_result= mysql_query($sql, $db);
  49 $takes = mysql_fetch_assoc($takes_result);
  50
  51 if ( (($test_row['start_date'] > time()) || ($test_row['end_date'] < time())) ||
  52    ( ($test_row['num_takes'] != AT_TESTS_TAKE_UNLIMITED) && ($takes['cnt'] >= $test_row['num_takes']) )  ) {
  53         require(AT_INCLUDE_PATH.'header.inc.php');
  54         $msg->printErrors('MAX_ATTEMPTS');
  55
  56         require(AT_INCLUDE_PATH.'footer.inc.php');
  57         exit;
  58 }
  59
  60 if (isset($_POST['submit'])) {
  61         // insert
  62         if (!isset($_POST['gid'])) {
  63                 $sql    = "SELECT result_id FROM ".TABLE_PREFIX."tests_results WHERE test_id=$tid AND member_id='$_SESSION[member_id]' AND status=0";
  64                 $result = mysql_query($sql, $db);
  65                 $row    = mysql_fetch_assoc($result);
  66                 $result_id = $row['result_id'];
  67         } else {
  68                 $sql    = "INSERT INTO ".TABLE_PREFIX."tests_results VALUES (NULL, $tid, '".$_POST["gid"]."', NOW(), '', 0, NOW(), 0)";
  69                 $result = mysql_query($sql, $db);
  70                 $result_id = mysql_insert_id($db);
  71         }
  72
  73         $final_score     = 0;
  74         $set_final_score = TRUE; // whether or not to save the final score in the results table.
  75
  76         $sql    = "SELECT TQA.weight, TQA.question_id, TQ.type, TQ.answer_0, TQ.answer_1, TQ.answer_2, TQ.answer_3, TQ.answer_4, TQ.answer_5, TQ.answer_6, TQ.answer_7, TQ.answer_8, TQ.answer_9 FROM ".TABLE_PREFIX."tests_questions_assoc TQA INNER JOIN ".TABLE_PREFIX."tests_questions TQ USING (question_id) WHERE TQA.test_id=$tid ORDER BY TQA.ordering, TQ.question_id";
  77         $result = mysql_query($sql, $db);
  78         while ($row = mysql_fetch_assoc($result)) {
  79                 if (isset($_POST['answers'][$row['question_id']])) {
  80                         $obj = TestQuestions::getQuestion($row['type']);
  81                         $score = $obj->mark($row);
  82
  83                         if (!isset($_POST["gid"])) {
  84                                 $sql    = "UPDATE ".TABLE_PREFIX."tests_answers SET answer='{$_POST[answers][$row[question_id]]}', score='$score' WHERE result_id=$result_id AND question_id=$row[question_id]";
  85                         } else {
  86                                 $sql    = "INSERT INTO ".TABLE_PREFIX."tests_answers VALUES ($result_id, $row[question_id], 0, '{$_POST[answers][$row[question_id]]}', '$score', '')";
  87                         }
  88                         mysql_query($sql, $db);
  89
  90                         $final_score += $score;
  91                 }
  92         }
  93
  94         // update the final score
  95         // update status to complate to fix refresh test issue.
  96         $sql    = "UPDATE ".TABLE_PREFIX."tests_results SET final_score=$final_score, date_taken=date_taken, status=1, end_time=NOW() WHERE result_id=$result_id";
  97         $result = mysql_query($sql, $db);
  98
  99         $msg->addFeedback('ACTION_COMPLETED_SUCCESSFULLY');
 100         if (!$_SESSION['enroll'] || $test_row['result_release']==AT_RELEASE_IMMEDIATE) {
 101                 header('Location: '.url_rewrite('tools/view_results.php?tid='.$tid.SEP.'rid='.$result_id, AT_PRETTY_URL_IS_HEADER));
 102                 exit;
 103         }
 104         header('Location: '.url_rewrite('tools/my_tests.php', AT_PRETTY_URL_IS_HEADER));
 105         exit;
 106 }
 107
 108 if (defined('AT_FORCE_GET_FILE') && AT_FORCE_GET_FILE) {
 109         $content_base_href = 'get.php/';
 110 } else {
 111         $course_base_href = 'content/' . $_SESSION['course_id'] . '/';
 112 }
 113
 114 require(AT_INCLUDE_PATH.'header.inc.php');
 115
 116 /* Retrieve the content_id of this test */
 117 $num_questions = $test_row['num_questions'];
 118 $content_id = $test_row['content_id'];
 119 $anonymous = $test_row['anonymous'];
 120 $instructions = $test_row['instructions'];
 121 $title = $test_row['title'];
 122
 123 $_letters = array(_AT('A'), _AT('B'), _AT('C'), _AT('D'), _AT('E'), _AT('F'), _AT('G'), _AT('H'), _AT('I'), _AT('J'));
 124
 125 // first check if there's an 'in progress' test.
 126 // this is the only place in the code that makes sure there is only ONE 'in progress' test going on.
 127 $in_progress = false;
 128 $sql = "SELECT result_id FROM ".TABLE_PREFIX."tests_results WHERE member_id='{$_SESSION['member_id']}' AND test_id=$tid AND status=0";
 129
 130 $result  = mysql_query($sql);
 131 if ($row = mysql_fetch_assoc($result)) {
 132         $result_id = $row['result_id'];
 133         $in_progress = true;
 134
 135         // retrieve the test questions that were saved to `tests_answers`
 136
 137         $sql    = "SELECT R.*, A.*, Q.* FROM ".TABLE_PREFIX."tests_answers R INNER JOIN ".TABLE_PREFIX."tests_questions_assoc A USING (question_id) INNER JOIN ".TABLE_PREFIX."tests_questions Q USING (question_id) WHERE R.result_id=$result_id AND A.test_id=$tid ORDER BY Q.question_id";
 138
 139 } else if ($test_row['random']) {
 140         /* Retrieve 'num_questions' question_id randomly choosed from those who are related to this test_id*/
 141
 142         $non_required_questions = array();
 143         $required_questions     = array();
 144
 145         $sql    = "SELECT question_id, required FROM ".TABLE_PREFIX."tests_questions_assoc WHERE test_id=$tid";
 146         $result = mysql_query($sql, $db);
 147
 148         while ($row = mysql_fetch_assoc($result)) {
 149                 if ($row['required'] == 1) {
 150                         $required_questions[] = $row['question_id'];
 151                 } else {
 152                         $non_required_questions[] = $row['question_id'];
 153                 }
 154         }
 155
 156         $num_required = count($required_questions);
 157         if ($num_required < max(1, $num_questions)) {
 158                 shuffle($non_required_questions);
 159                 $required_questions = array_merge($required_questions, array_slice($non_required_questions, 0, $num_questions - $num_required));
 160         }
 161
 162         $random_id_string = implode(',', $required_questions);
 163
 164         $sql = "SELECT TQ.*, TQA.* FROM ".TABLE_PREFIX."tests_questions TQ INNER JOIN ".TABLE_PREFIX."tests_questions_assoc TQA USING (question_id) WHERE TQ.course_id=$_SESSION[course_id] AND TQA.test_id=$tid AND TQA.question_id IN ($random_id_string) ORDER BY TQ.question_id";
 165 } else {
 166         $sql    = "SELECT TQ.*, TQA.* FROM ".TABLE_PREFIX."tests_questions TQ INNER JOIN ".TABLE_PREFIX."tests_questions_assoc TQA USING (question_id) WHERE TQ.course_id=$_SESSION[course_id] AND TQA.test_id=$tid ORDER BY TQA.ordering, TQA.question_id";
 167 }
 168
 169 $result = mysql_query($sql, $db);
 170
 171 $questions = array();
 172 while ($row = mysql_fetch_assoc($result)) {
 173         $questions[] = $row;
 174 }
 175
 176 if (!$result || !$questions) {
 177         echo '<p>'._AT('no_questions').'</p>';
 178         require(AT_INCLUDE_PATH.'footer.inc.php');
 179         exit;
 180 }
 181
 182 // save $questions with no response, and set status to 'in progress' in test_results <---
 183 if (!isset($_REQUEST['gid']) && !$in_progress) {
 184         $sql    = "INSERT INTO ".TABLE_PREFIX."tests_results VALUES (NULL, $tid, '$_SESSION[member_id]', NOW(), '', 0, NOW(), 0)";
 185         $result = mysql_query($sql, $db);
 186         $result_id = mysql_insert_id($db);
 187 }
 188 ?>
 189 <form method="post" action="<?php echo $_SERVER['PHP_SELF']; ?>">
 190 <input type="hidden" name="tid" value="<?php echo $tid; ?>" />
 191 <?php if (isset($_REQUEST['gid'])): ?>
 192 <input type="hidden" name="gid" value="<?php echo $gid; ?>" />
 193 <?php endif; ?>
 194
 195 <div class="input-form" style="width:80%">
 196         <fieldset class="group_form"><legend class="group_form"><?php echo $title ?></legend>
 197
 198
 199         <?php if ($instructions!=''): ?>
 200                 <div style="background-color: #f3f3f3; padding: 5px 10px; margin: 0px; border-top: 1px solid">
 201                         <strong><?php echo _AT('instructions'); ?></strong>
 202                 </div>
 203                 <div class="row" style="padding-bottom: 20px"><?php echo $instructions; ?></div>
 204         <?php endif; ?>
 205
 206         <?php if ($anonymous): ?>
 207                 <div class="row"><em><strong><?php echo _AT('test_anonymous'); ?></strong></em></div>
 208         <?php endif; ?>
 209
 210         <?php
 211         foreach ($questions as $row) {
 212                 if (!isset($_POST["gid"]) && !$in_progress) {
 213                         $sql    = "INSERT INTO ".TABLE_PREFIX."tests_answers VALUES ($result_id, $row[question_id], $_SESSION[member_id], '', '', '')";
 214                         mysql_query($sql, $db);
 215                 }
 216
 217                 $obj = TestQuestions::getQuestion($row['type']);
 218                 $obj->display($row);
 219         }
 220         ?>
 221         <div style="background-color: #f3f3f3; padding: 5px 10px; margin: 0px; border-top: 1px solid">
 222                 <strong><?php echo _AT('done'); ?>!</strong>
 223         </div>
 224         <div class="row buttons">
 225                 <input type="submit" name="submit" value="<?php echo _AT('submit'); ?>" accesskey="s" />
 226         </div>
 227 </div>
 228 </form>
 229 <script type="text/javascript">
 230 //<!--
 231 function iframeSetHeight(id, height) {
 232         document.getElementById("qframe" + id).style.height = (height + 20) + "px";
 233 }
 234 //-->
 235 </script>
 236 <?php require(AT_INCLUDE_PATH.'footer.inc.php'); ?>