Chamilo is a learning management system focused on ease of use and accessibility
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chamilo-lms/main/exercice/exercice_submit.php

1105 lines
42 KiB

<?php
// $Id: exercice_submit.php 22201 2009-07-17 19:57:03Z cfasanando $
/*
==============================================================================
Dokeos - elearning and course management software
Copyright (c) 2004-2008 Dokeos SPRL
Copyright (c) 2003 Ghent University (UGent)
Copyright (c) 2001 Universite catholique de Louvain (UCL)
Copyright (c) various contributors
For a full list of contributors, see "credits.txt".
The full license can be read in "license.txt".
This program 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 2
of the License, or (at your option) any later version.
See the GNU General Public License for more details.
Contact address: Dokeos, rue du Corbeau, 108, B-1030 Brussels, Belgium
Mail: info@dokeos.com
==============================================================================
*/
/**
* Exercise submission
* This script allows to run an exercise. According to the exercise type, questions
* can be on an unique page, or one per page with a Next button.
*
* One exercise may contain different types of answers (unique or multiple selection,
* matching, fill in blanks, free answer, hot-spot).
*
* Questions are selected randomly or not.
*
* When the user has answered all questions and clicks on the button "Ok",
* it goes to exercise_result.php
*
* Notice : This script is also used to show a question before modifying it by
* the administrator
* @package dokeos.exercise
* @author Olivier Brouckaert
* @author Julio Montoya multiple fill in blank option added
* @version $Id: exercice_submit.php 22201 2009-07-17 19:57:03Z cfasanando $
*/
require_once 'exercise.class.php';
require_once 'question.class.php';
require_once 'answer.class.php';
require_once 'exercise.lib.php';
// debug var. Set to 0 to hide all debug display. Set to 1 to display debug messages.
$debug = 0;
/*
// answer types
define('UNIQUE_ANSWER', 1);
define('MULTIPLE_ANSWER', 2);
define('FILL_IN_BLANKS', 3);
define('MATCHING', 4);
define('FREE_ANSWER', 5);
define('HOT_SPOT', 6);
define('HOT_SPOT_ORDER', 7);
*/
// name of the language file that needs to be included
$language_file = 'exercice';
require_once '../inc/global.inc.php';
$this_section = SECTION_COURSES;
/* ------------ ACCESS RIGHTS ------------ */
// notice for unauthorized people.
api_protect_course_script(true);
require_once api_get_path(LIBRARY_PATH) . 'text.lib.php';
$is_allowedToEdit = api_is_allowed_to_edit();
$_configuration['live_exercise_tracking'] = true;
$stat_table = Database :: get_statistic_table(TABLE_STATISTIC_TRACK_E_EXERCICES);
$exercice_attemp_table = Database :: get_statistic_table(TABLE_STATISTIC_TRACK_E_ATTEMPT);
$TBL_EXERCICE_QUESTION = Database :: get_course_table(TABLE_QUIZ_TEST_QUESTION);
$TBL_EXERCICES = Database :: get_course_table(TABLE_QUIZ_TEST);
$TBL_QUESTIONS = Database :: get_course_table(TABLE_QUIZ_QUESTION);
$TBL_REPONSES = Database :: get_course_table(TABLE_QUIZ_ANSWER);
// general parameters passed via POST/GET
if (empty ($origin)) {
$origin = $_REQUEST['origin'];
}
if (empty ($learnpath_id)) {
$learnpath_id = Security::remove_XSS($_REQUEST['learnpath_id']);
}
if (empty ($learnpath_item_id)) {
$learnpath_item_id = Security::remove_XSS($_REQUEST['learnpath_item_id']);
}
if (empty ($formSent)) {
$formSent = $_REQUEST['formSent'];
}
if (empty ($exerciseResult)) {
$exerciseResult = $_REQUEST['exerciseResult'];
}
if (empty ($exerciseResultCoordinates)) {
$exerciseResultCoordinates = $_REQUEST['exerciseResultCoordinates'];
}
if (empty ($exerciseType)) {
$exerciseType = $_REQUEST['exerciseType'];
}
if (empty ($exerciseId)) {
$exerciseId = Database::escape_string(intval($_REQUEST['exerciseId']));
}
if (empty ($choice)) {
$choice = $_REQUEST['choice'];
}
if (empty ($_REQUEST['choice'])) {
$choice = $_REQUEST['choice2'];
}
if (empty ($questionNum)) {
$questionNum = Database :: escape_string($_REQUEST['questionNum']);
}
if (empty ($nbrQuestions)) {
$nbrQuestions = Database :: escape_string($_REQUEST['nbrQuestions']);
}
if (empty ($buttonCancel)) {
$buttonCancel = $_REQUEST['buttonCancel'];
}
$error = '';
if (!isset ($exerciseType)) {
$exe_start_date = time();
$_SESSION['exercice_start_date'] = $exe_start_date;
}
// if the user has clicked on the "Cancel" button
if ($buttonCancel) {
// returns to the exercise list
header("Location: exercice.php?origin=$origin&learnpath_id=$learnpath_id&learnpath_item_id=$learnpath_item_id");
exit ();
}
if ($origin == 'learnpath' && isset ($_GET['not_multiple_attempt']) && $_GET['not_multiple_attempt'] == strval(intval($_GET['not_multiple_attempt']))) {
$not_multiple_attempt = (int) $_GET['not_multiple_attempt'];
if ($not_multiple_attempt === 1) {
require_once '../inc/reduced_header.inc.php';
echo '<div style="height:10px">&nbsp;</div>';
Display :: display_warning_message(get_lang('ReachedOneAttempt'));
exit;
}
}
if ($origin == 'builder') {
/*******************************/
/* Clears the exercise session */
/*******************************/
if (isset ($_SESSION['objExercise'])) {
api_session_unregister('objExercise');
unset ($objExercise);
}
if (isset ($_SESSION['objQuestion'])) {
api_session_unregister('objQuestion');
unset ($objQuestion);
}
if (isset ($_SESSION['objAnswer'])) {
api_session_unregister('objAnswer');
unset ($objAnswer);
}
if (isset ($_SESSION['questionList'])) {
api_session_unregister('questionList');
unset ($questionList);
}
if (isset ($_SESSION['newquestionList'])) {
api_session_unregister('newquestionList');
unset ($newquestionList);
}
if (isset ($_SESSION['exerciseResult'])) {
api_session_unregister('exerciseResult');
unset ($exerciseResult);
}
if (isset ($_SESSION['exerciseResultCoordinates'])) {
api_session_unregister('exerciseResultCoordinates');
unset ($exerciseResultCoordinates);
}
}
$safe_lp_id = ($learnpath_id == '') ? 0 : (int) $learnpath_id;
$safe_lp_item_id = ($learnpath_item_id == '') ? 0 : (int) $learnpath_item_id;
$condition = ' WHERE ' .
'exe_exo_id = ' . "'" . $exerciseId . "'" . ' AND ' .
'exe_user_id = ' . "'" . api_get_user_id() . "'" . ' AND ' .
'exe_cours_id = ' . "'" . $_course['id'] . "'" . ' AND ' .
'status = ' . "'incomplete'" . ' AND ' .
'orig_lp_id = ' . "'" . $safe_lp_id . "'" . ' AND ' .
'orig_lp_item_id = ' . "'" . $safe_lp_item_id . "'" . ' AND ' .
'session_id = ' . "'" . (int) $_SESSION['id_session'] . "'";
$TBL_EXERCICES = Database :: get_course_table(TABLE_QUIZ_TEST);
$result = api_sql_query("SELECT type,feedback_type FROM $TBL_EXERCICES WHERE id=$exerciseId", __FILE__, __LINE__);
$exercise_row = Database :: fetch_array($result);
$exerciseType = $exercise_row['type'];
$exerciseFeedbackType = $exercise_row['feedback_type'];
if ($_configuration['live_exercise_tracking'] == true && $exerciseType == 2 && $exerciseFeedbackType != 1) {
$query = 'SELECT * FROM ' . $stat_table . $condition;
$result_select = api_sql_query($query, __FILE__, __LINE__);
if (Database :: num_rows($result_select) > 0) {
$getIncomplete = Database :: fetch_array($result_select);
$exe_id = $getIncomplete['exe_id'];
if ($_SERVER['REQUEST_METHOD'] != 'POST') {
define('QUESTION_LIST_ALREADY_LOGGED', 1);
$recorded['questionList'] = explode(',', $getIncomplete['data_tracking']);
$query = 'SELECT * FROM ' . $exercice_attemp_table . ' WHERE exe_id = ' . $getIncomplete['exe_id'] . ' ORDER BY tms ASC';
$result = api_sql_query($query, __FILE__, __LINE__);
while ($row = Database :: fetch_array($result)) {
$recorded['exerciseResult'][$row['question_id']] = 1;
}
$exerciseResult = $_SESSION['exerciseResult'] = $recorded['exerciseResult'];
$exerciseType = 2;
$questionNum = count($recorded['exerciseResult']);
$questionNum++;
$questionList = $_SESSION['questionList'] = $recorded['questionList'];
}
} else {
$table_recorded_not_exist = true;
}
}
// if the user has submitted the form
if ($formSent) {
if ($debug > 0) {
echo str_repeat('&nbsp;', 0) . '$formSent was set' . "<br />\n";
}
// initializing
if (!is_array($exerciseResult)) {
$exerciseResult = array ();
$exerciseResultCoordinates = array ();
}
// if the user has answered at least one question
if (is_array($choice)) {
if ($debug > 0) {
echo str_repeat('&nbsp;', 0) . '$choice is an array' . "<br />\n";
}
if ($exerciseType == 1)
{
// $exerciseResult receives the content of the form.
// Each choice of the student is stored into the array $choice
$exerciseResult = $choice;
// Also store hotspot spots in the session ($exerciseResultCoordinates
// will be stored in the session at the end of this script)
// The results will be stored by exercise_result.php if we are in
// an exercise of type 1 (=all on one page)
if (isset ($_POST['hotspot'])) {
$exerciseResultCoordinates = $_POST['hotspot'];
}
} else {
// gets the question ID from $choice. It is the key of the array
list ($key) = array_keys($choice);
// if the user didn't already answer this question
if (!isset ($exerciseResult[$key])) {
// stores the user answer into the array
$exerciseResult[$key] = $choice[$key];
//saving each question
if ($_configuration['live_exercise_tracking'] == true && $exerciseType == 2 && $exerciseFeedbackType != 1) {
$nro_question = $questionNum; // - 1;
//START of saving and qualifying each question submitted
//------------------------------------------------------------------------------------------
//
define('ENABLED_LIVE_EXERCISE_TRACKING', 1);
require_once 'question.class.php';
require_once 'answer.class.php';
$counter = 0;
$main_course_user_table = Database :: get_main_table(TABLE_MAIN_COURSE_USER);
$table_ans = Database :: get_course_table(TABLE_QUIZ_ANSWER);
//foreach($questionList as $questionId)
if (true) {
$exeId = $exe_id;
$questionId = $key;
$counter++;
// gets the student choice for this question
$choice = $exerciseResult[$questionId];
// creates a temporary Question object
$objQuestionTmp = Question :: read($questionId);
$questionName = $objQuestionTmp->selectTitle();
$questionDescription = $objQuestionTmp->selectDescription();
$questionWeighting = $objQuestionTmp->selectWeighting();
$answerType = $objQuestionTmp->selectType();
$quesId = $objQuestionTmp->selectId(); //added by priya saini
// destruction of the Question object
unset ($objQuestionTmp);
if (isset ($_POST['hotspot']) && isset($_POST['hotspot'][$key])) {
$exerciseResultCoordinates[$key] = $_POST['hotspot'][$key];
}
// construction of the Answer object
$objAnswerTmp = new Answer($questionId);
$nbrAnswers = $objAnswerTmp->selectNbrAnswers();
$questionScore = 0;
if ($answerType == FREE_ANSWER) {
$nbrAnswers = 1;
}
for ($answerId = 1; $answerId <= $nbrAnswers; $answerId++) {
$answer = $objAnswerTmp->selectAnswer($answerId);
$answerComment = $objAnswerTmp->selectComment($answerId);
$answerCorrect = $objAnswerTmp->isCorrect($answerId);
$answerWeighting = $objAnswerTmp->selectWeighting($answerId);
switch ($answerType) {
// for unique answer
case UNIQUE_ANSWER :
$studentChoice = ($choice == $answerId) ? 1 : 0;
if ($studentChoice) {
$questionScore += $answerWeighting;
$totalScore += $answerWeighting;
}
break;
// for multiple answers
case MULTIPLE_ANSWER :
$studentChoice = $choice[$answerId];
if ($studentChoice) {
$questionScore += $answerWeighting;
$totalScore += $answerWeighting;
}
break;
// for fill in the blanks
case FILL_IN_BLANKS :
// the question is encoded like this
// [A] B [C] D [E] F::10,10,10@1
// number 1 before the "@" means that is a switchable fill in blank question
// [A] B [C] D [E] F::10,10,10@ or [A] B [C] D [E] F::10,10,10
// means that is a normal fill blank question
// first we explode the "::"
$pre_array = explode('::', $answer);
// is switchable fill blank or not
$last = count($pre_array) - 1;
$is_set_switchable = explode('@', $pre_array[$last]);
$switchable_answer_set = false;
if (isset ($is_set_switchable[1]) && $is_set_switchable[1] == 1) {
$switchable_answer_set = true;
}
$answer = '';
for ($k = 0; $k < $last; $k++) {
$answer .= $pre_array[$k];
}
// splits weightings that are joined with a comma
$answerWeighting = explode(',', $is_set_switchable[0]);
// we save the answer because it will be modified
$temp = $answer;
// TeX parsing
// 1. find everything between the [tex] and [/tex] tags
$startlocations = strpos($temp, '[tex]');
$endlocations = strpos($temp, '[/tex]');
if ($startlocations !== false && $endlocations !== false) {
$texstring = substr($temp, $startlocations, $endlocations - $startlocations +6);
// 2. replace this by {texcode}
$temp = str_replace($texstring, '{texcode}', $temp);
}
$answer = '';
$j = 0;
//initialise answer tags
$user_tags = array ();
$correct_tags = array ();
$real_text = array ();
// the loop will stop at the end of the text
while (1) {
// quits the loop if there are no more blanks (detect '[')
if (($pos = strpos($temp, '[')) === false) {
// adds the end of the text
$answer = $temp;
// TeX parsing - replacement of texcode tags
$texstring = api_parse_tex($texstring);
$answer = str_replace("{texcode}", $texstring, $answer);
$real_text[] = $answer;
break; //no more "blanks", quit the loop
}
// adds the piece of text that is before the blank
//and ends with '[' into a general storage array
$real_text[] = substr($temp, 0, $pos +1);
$answer .= substr($temp, 0, $pos +1);
//take the string remaining (after the last "[" we found)
$temp = substr($temp, $pos +1);
// quit the loop if there are no more blanks, and update $pos to the position of next ']'
if (($pos = strpos($temp, ']')) === false) {
// adds the end of the text
$answer .= $temp;
break;
}
$choice[$j] = trim($choice[$j]);
$user_tags[] = strtolower($choice[$j]);
//put the contents of the [] answer tag into correct_tags[]
$correct_tags[] = strtolower(substr($temp, 0, $pos));
$j++;
$temp = substr($temp, $pos +1);
//$answer .= ']';
}
$answer = '';
$real_correct_tags = $correct_tags;
$chosen_list = array ();
for ($i = 0; $i < count($real_correct_tags); $i++) {
if ($i == 0) {
$answer .= $real_text[0];
}
if (!$switchable_answer_set) {
if ($correct_tags[$i] == $user_tags[$i]) {
// gives the related weighting to the student
$questionScore += $answerWeighting[$i];
// increments total score
$totalScore += $answerWeighting[$i];
// adds the word in green at the end of the string
$answer .= $correct_tags[$i];
}
// else if the word entered by the student IS NOT the same as the one defined by the professor
elseif (!empty ($user_tags[$i])) {
// adds the word in red at the end of the string, and strikes it
$answer .= '<font color="red"><s>' . $user_tags[$i] . '</s></font>';
} else {
// adds a tabulation if no word has been typed by the student
$answer .= '&nbsp;&nbsp;&nbsp;';
}
} else {
// switchable fill in the blanks
if (in_array($user_tags[$i], $correct_tags)) {
$chosen_list[] = $user_tags[$i];
$correct_tags = array_diff($correct_tags, $chosen_list);
// gives the related weighting to the student
$questionScore += $answerWeighting[$i];
// increments total score
$totalScore += $answerWeighting[$i];
// adds the word in green at the end of the string
$answer .= $user_tags[$i];
}
elseif (!empty ($user_tags[$i])) {
// else if the word entered by the student IS NOT the same as the one defined by the professor
// adds the word in red at the end of the string, and strikes it
$answer .= '<font color="red"><s>' . $user_tags[$i] . '</s></font>';
} else {
// adds a tabulation if no word has been typed by the student
$answer .= '&nbsp;&nbsp;&nbsp;';
}
}
// adds the correct word, followed by ] to close the blank
$answer .= ' / <font color="green"><b>' . $real_correct_tags[$i] . '</b></font>]';
if (isset ($real_text[$i +1])) {
$answer .= $real_text[$i +1];
}
}
break;
// for free answer
case FREE_ANSWER :
$studentChoice = $choice;
if ($studentChoice) {
//Score is at -1 because the question has'nt been corected
$questionScore = -1;
$totalScore += 0;
}
break;
// for matching
case MATCHING :
if ($answerCorrect) {
if ($answerCorrect == $choice[$answerId]) {
$questionScore += $answerWeighting;
$totalScore += $answerWeighting;
$choice[$answerId] = $matching[$choice[$answerId]];
}
elseif (!$choice[$answerId]) {
$choice[$answerId] = '&nbsp;&nbsp;&nbsp;';
} else {
$choice[$answerId] = '<font color="red"><s>' . $matching[$choice[$answerId]] . '</s></font>';
}
} else {
$matching[$answerId] = $answer;
}
break;
// for hotspot with no order
case HOT_SPOT :
$studentChoice = $choice[$answerId];
if ($studentChoice) {
$questionScore += $answerWeighting;
$totalScore += $answerWeighting;
}
break;
// for hotspot with fixed order
case HOT_SPOT_ORDER :
$studentChoice = $choice['order'][$answerId];
if ($studentChoice == $answerId) {
$questionScore += $answerWeighting;
$totalScore += $answerWeighting;
$studentChoice = true;
} else {
$studentChoice = false;
}
break;
} // end switch Answertype
} // end for that loops over all answers of the current question
// destruction of Answer
unset ($objAnswerTmp);
$i++;
$totalWeighting += $questionWeighting;
//added by priya saini
// Store results directly in the database
// For all in one page exercises, the results will be
// stored by exercise_results.php (using the session)
if ($_configuration['tracking_enabled']) {
if (empty ($choice)) {
$choice = 0;
}
if ($answerType == MULTIPLE_ANSWER) {
if ($choice != 0) {
$reply = array_keys($choice);
for ($i = 0; $i < sizeof($reply); $i++) {
$ans = $reply[$i];
exercise_attempt($questionScore, $ans, $quesId, $exeId, $i);
}
} else {
exercise_attempt($questionScore, 0, $quesId, $exeId, 0);
}
}
elseif ($answerType == MATCHING) {
$j = sizeof($matching) + 1;
for ($i = 0; $i < sizeof($choice); $i++, $j++) {
$val = $choice[$j];
if (preg_match_all('#<font color="red"><s>([0-9a-z ]*)</s></font>#', $val, $arr1)) {
$val = $arr1[1][0];
}
$val = $val;
$val = strip_tags($val);
$sql = "select position from $table_ans where question_id='" . Database :: escape_string($questionId) . "' and answer='" . Database :: escape_string($val) . "' AND correct=0";
$res = api_sql_query($sql, __FILE__, __LINE__);
if (Database :: num_rows($res) > 0) {
$answer = Database :: result($res, 0, "position");
} else {
$answer = '';
}
exercise_attempt($questionScore, $answer, $quesId, $exeId, $j);
}
} elseif ($answerType == FREE_ANSWER) {
$answer = $choice;
exercise_attempt($questionScore, $answer, $quesId, $exeId, 0);
} elseif ($answerType == UNIQUE_ANSWER) {
$sql = "select id from $table_ans where question_id='" . Database :: escape_string($questionId) . "' and position='" . Database :: escape_string($choice) . "'";
$res = api_sql_query($sql, __FILE__, __LINE__);
$answer = Database :: result($res, 0, "id");
exercise_attempt($questionScore, $answer, $quesId, $exeId, 0);
} elseif ($answerType == HOT_SPOT) {
exercise_attempt($questionScore, $answer, $quesId, $exeId, 0);
if (is_array($exerciseResultCoordinates[$key])) {
foreach($exerciseResultCoordinates[$key] as $idx => $val) {
exercise_attempt_hotspot($exeId,$quesId,$idx,$choice[$idx],$val);
}
}
} else {
exercise_attempt($questionScore, $answer, $quesId, $exeId, 0);
}
}
}
// end huge foreach() block that loops over all questions
//at loops over all questions
if (isset($exe_id)) {
$sql_update = 'UPDATE ' . $stat_table . ' SET exe_result = exe_result + ' . (int) $totalScore . ',exe_weighting = exe_weighting + ' . (int) $totalWeighting . ' WHERE exe_id = ' . Database::escape_string($exe_id);
api_sql_query($sql_update, __FILE__, __LINE__);
}
//END of saving and qualifying
//------------------------------------------------------------------------------------------
//
}
}
}
if ($debug > 0) {
echo str_repeat('&nbsp;', 0) . '$choice is an array - end' . "<br />\n";
}
}
// the script "exercise_result.php" will take the variable $exerciseResult from the session
api_session_register('exerciseResult');
api_session_register('exerciseResultCoordinates');
define('ALL_ON_ONE_PAGE',1);
define('ONE_PER_PAGE',2);
// if all questions on one page OR if it is the last question (only for an exercise with one question per page)
if ($exerciseType == ALL_ON_ONE_PAGE || $questionNum >= $nbrQuestions) {
if ($debug > 0) {
echo str_repeat('&nbsp;', 0) . 'Redirecting to exercise_result.php - Remove debug option to let this happen' . "<br />\n";
}
// goes to the script that will show the result of the exercise
if ($exerciseType == ALL_ON_ONE_PAGE) {
header("Location: exercise_result.php?id=$exe_id&exerciseType=$exerciseType&origin=$origin&learnpath_id=$learnpath_id&learnpath_item_id=$learnpath_item_id");
} else {
if ($exe_id != '') {
//clean incomplete
$update_query = 'UPDATE ' . $stat_table . ' SET ' . "status = '', data_tracking='', exe_date = '" . date('Y-m-d H:i:s') . "'" . ' WHERE exe_id = ' . Database::escape_string($exe_id);
api_sql_query($update_query, __FILE__, __LINE__);
}
header("Location: exercise_show.php?id=$exe_id&exerciseType=$exerciseType&origin=$origin&learnpath_id=$learnpath_id&learnpath_item_id=$learnpath_item_id");
}
exit ();
}
if ($debug > 0) {
echo str_repeat('&nbsp;', 0) . '$formSent was set - end' . "<br />\n";
}
}
// if the object is not in the session
//why destroying the exercise when a LP is loaded ?
//if (!isset($_SESSION['objExercise']) || $origin == 'learnpath' || $_SESSION['objExercise']->id != $_REQUEST['exerciseId']) {
if (!isset ($_SESSION['objExercise']) || $_SESSION['objExercise']->id != $_REQUEST['exerciseId']) {
if ($debug > 0) {
echo str_repeat('&nbsp;', 0) . '$_SESSION[objExercise] was unset' . "<br />\n";
}
// construction of Exercise
$objExercise = new Exercise();
unset ($_SESSION['questionList']);
// if the specified exercise doesn't exist or is disabled
if (!$objExercise->read($exerciseId) || (!$objExercise->selectStatus() && !$is_allowedToEdit && ($origin != 'learnpath'))) {
unset ($objExercise);
$error = get_lang('ExerciseNotFound');
//die(get_lang('ExerciseNotFound'));
} else {
// saves the object into the session
api_session_register('objExercise');
if ($debug > 0) {
echo str_repeat('&nbsp;', 0) . '$_SESSION[objExercise] was unset - set now - end' . "<br />\n";
}
}
}
if (!isset ($objExcercise) && isset ($_SESSION['objExercise'])) {
$objExercise = $_SESSION['objExercise'];
}
if (!is_object($objExercise)) {
header('Location: exercice.php');
exit ();
}
$Exe_starttime = $objExercise->start_time;
$Exe_endtime = $objExercise->end_time;
$quizID = $objExercise->selectId();
$exerciseAttempts = $objExercise->selectAttempts();
$exerciseTitle = $objExercise->selectTitle();
$exerciseDescription = $objExercise->selectDescription();
$exerciseDescription = $exerciseDescription;
$exerciseSound = $objExercise->selectSound();
$randomQuestions = $objExercise->isRandom();
$exerciseType = $objExercise->selectType();
$table_quiz_test = Database :: get_course_table(TABLE_QUIZ_TEST);
//if (!isset($_SESSION['questionList']) || $origin == 'learnpath') {
//in LP's is enabled the "remember question" feature?
$my_exe_id = Security :: remove_XSS($_GET['exerciseId']);
if (!isset ($_SESSION['questionList'])) {
if ($debug > 0) {
echo str_repeat('&nbsp;', 0) . '$_SESSION[questionList] was unset' . "<br />\n";
}
// selects the list of question ID
$my_question_list = array ();
$questionList = ($randomQuestions ? $objExercise->selectRandomList() : $objExercise->selectQuestionList());
// saves the question list into the session
$sql = 'SELECT random FROM ' . $table_quiz_test . ' WHERE id="' . Database :: escape_string($my_exe_id) . '";';
$rs = api_sql_query($sql, __FILE__, __LINE__);
$row_number = Database :: fetch_array($rs);
$z = 0;
if ($row_number['random'] <> 0) {
foreach ($questionList as $infoquestionList) {
if ($z < $row_number['random']) {
$my_question_list[$z] = $infoquestionList;
} else {
break;
}
$z++;
}
// $questionList=array();
$questionList = $my_question_list;
}
api_session_register('questionList');
if ($debug > 0) {
echo str_repeat('&nbsp;', 0) . '$_SESSION[questionList] was unset - set now - end' . "<br />\n";
}
}
if (!isset ($objExcercise) && isset ($_SESSION['objExercise'])) {
$questionList = $_SESSION['questionList'];
}
$quizStartTime = time();
api_session_register('quizStartTime');
$nbrQuestions = sizeof($questionList);
// if questionNum comes from POST and not from GET
if (!$questionNum || $_POST['questionNum']) {
// only used for sequential exercises (see $exerciseType)
if (!$questionNum) {
$questionNum = 1;
} else {
$questionNum++;
}
}
if (!empty ($_GET['gradebook']) && $_GET['gradebook'] == 'view') {
$_SESSION['gradebook'] = Security :: remove_XSS($_GET['gradebook']);
$gradebook = $_SESSION['gradebook'];
}
elseif (empty ($_GET['gradebook'])) {
unset ($_SESSION['gradebook']);
$gradebook = '';
}
if (!empty ($gradebook) && $gradebook == 'view') {
$interbreadcrumb[] = array (
'url' => '../gradebook/' . $_SESSION['gradebook_dest'],
'name' => get_lang('Gradebook')
);
}
//$nameTools=get_lang('Exercice');
$interbreadcrumb[] = array (
"url" => "exercice.php?gradebook=$gradebook",
"name" => get_lang('Exercices')
);
$interbreadcrumb[] = array (
"url" => api_get_self()."?gradebook=$gradebook",
"name" => $exerciseTitle
);
if ($origin != 'learnpath') { //so we are not in learnpath tool
$htmlHeadXtra[] = "<script type=\"text/javascript\" src=\"../plugin/hotspot/JavaScriptFlashGateway.js\"></script>
<script src=\"../plugin/hotspot/hotspot.js\" type=\"text/javascript\"></script>
<script language=\"JavaScript\" type=\"text/javascript\">
<!--
// -----------------------------------------------------------------------------
// Globals
// Major version of Flash required
var requiredMajorVersion = 7;
// Minor version of Flash required
var requiredMinorVersion = 0;
// Minor version of Flash required
var requiredRevision = 0;
// the version of javascript supported
var jsVersion = 1.0;
// -----------------------------------------------------------------------------
// -->
</script>
<script language=\"VBScript\" type=\"text/vbscript\">
<!-- // Visual basic helper required to detect Flash Player ActiveX control version information
Function VBGetSwfVer(i)
on error resume next
Dim swControl, swVersion
swVersion = 0
set swControl = CreateObject(\"ShockwaveFlash.ShockwaveFlash.\" + CStr(i))
if (IsObject(swControl)) then
swVersion = swControl.GetVariable(\"\$version\")
end if
VBGetSwfVer = swVersion
End Function
// -->
</script>
<script language=\"JavaScript1.1\" type=\"text/javascript\">
<!-- // Detect Client Browser type
var isIE = (navigator.appVersion.indexOf(\"MSIE\") != -1) ? true : false;
var isWin = (navigator.appVersion.toLowerCase().indexOf(\"win\") != -1) ? true : false;
var isOpera = (navigator.userAgent.indexOf(\"Opera\") != -1) ? true : false;
jsVersion = 1.1;
// JavaScript helper required to detect Flash Player PlugIn version information
function JSGetSwfVer(i){
// NS/Opera version >= 3 check for Flash plugin in plugin array
if (navigator.plugins != null && navigator.plugins.length > 0) {
if (navigator.plugins[\"Shockwave Flash 2.0\"] || navigator.plugins[\"Shockwave Flash\"]) {
var swVer2 = navigator.plugins[\"Shockwave Flash 2.0\"] ? \" 2.0\" : \"\";
var flashDescription = navigator.plugins[\"Shockwave Flash\" + swVer2].description;
descArray = flashDescription.split(\" \");
tempArrayMajor = descArray[2].split(\".\");
versionMajor = tempArrayMajor[0];
versionMinor = tempArrayMajor[1];
if ( descArray[3] != \"\" ) {
tempArrayMinor = descArray[3].split(\"r\");
} else {
tempArrayMinor = descArray[4].split(\"r\");
}
versionRevision = tempArrayMinor[1] > 0 ? tempArrayMinor[1] : 0;
flashVer = versionMajor + \".\" + versionMinor + \".\" + versionRevision;
} else {
flashVer = -1;
}
}
// MSN/WebTV 2.6 supports Flash 4
else if (navigator.userAgent.toLowerCase().indexOf(\"webtv/2.6\") != -1) flashVer = 4;
// WebTV 2.5 supports Flash 3
else if (navigator.userAgent.toLowerCase().indexOf(\"webtv/2.5\") != -1) flashVer = 3;
// older WebTV supports Flash 2
else if (navigator.userAgent.toLowerCase().indexOf(\"webtv\") != -1) flashVer = 2;
// Can't detect in all other cases
else {
flashVer = -1;
}
return flashVer;
}
// When called with reqMajorVer, reqMinorVer, reqRevision returns true if that version or greater is available
function DetectFlashVer(reqMajorVer, reqMinorVer, reqRevision)
{
reqVer = parseFloat(reqMajorVer + \".\" + reqRevision);
// loop backwards through the versions until we find the newest version
for (i=25;i>0;i--) {
if (isIE && isWin && !isOpera) {
versionStr = VBGetSwfVer(i);
} else {
versionStr = JSGetSwfVer(i);
}
if (versionStr == -1 ) {
return false;
} else if (versionStr != 0) {
if(isIE && isWin && !isOpera) {
tempArray = versionStr.split(\" \");
tempString = tempArray[1];
versionArray = tempString .split(\",\");
} else {
versionArray = versionStr.split(\".\");
}
versionMajor = versionArray[0];
versionMinor = versionArray[1];
versionRevision = versionArray[2];
versionString = versionMajor + \".\" + versionRevision; // 7.0r24 == 7.24
versionNum = parseFloat(versionString);
// is the major.revision >= requested major.revision AND the minor version >= requested minor
if ( (versionMajor > reqMajorVer) && (versionNum >= reqVer) ) {
return true;
} else {
return ((versionNum >= reqVer && versionMinor >= reqMinorVer) ? true : false );
}
}
}
}
// -->
</script>";
Display :: display_header($nameTools, "Exercise");
} else {
if (empty ($charset)) {
$charset = 'ISO-8859-15';
}
/*
* HTML HEADER
*/
Display::display_reduced_header();
echo '<div style="height:10px">&nbsp;</div>';
}
// I'm in a preview mode
if (api_is_course_admin() && $origin != 'learnpath') {
echo '<div class="actions">';
echo Display :: return_icon('quiz.gif', get_lang('GoBackToEx')) . '<a href="admin.php?' . api_get_cidreq() . '&exerciseId=' . $objExercise->id . '">' . get_lang('GoBackToEx') . '</a>';
echo Display :: return_icon('edit.gif', get_lang('ModifyExercise')) . '<a href="exercise_admin.php?modifyExercise=yes&exerciseId=' . $objExercise->id . '">' . get_lang('ModifyExercise') . '</a>';
echo '</div>';
}
$exerciseTitle = api_parse_tex($exerciseTitle);
echo "<h3>" . $exerciseTitle . "</h3>";
if ($exerciseAttempts > 0) {
$user_id = api_get_user_id();
$course_code = api_get_course_id();
$sql = "SELECT count(*) FROM $stat_table WHERE exe_exo_id = '$quizID'
AND exe_user_id = '$user_id'
AND status != 'incomplete'
AND orig_lp_id = $safe_lp_id
AND orig_lp_item_id = $safe_lp_item_id
AND exe_cours_id = '$course_code' AND session_id = '" . (int) $_SESSION['id_session'] . "'";
$aquery = api_sql_query($sql, __FILE__, __LINE__);
$attempt = Database :: fetch_array($aquery);
if ($attempt[0] >= $exerciseAttempts) {
if (!api_is_allowed_to_edit()) {
Display :: display_warning_message(sprintf(get_lang('ReachedMaxAttempts'), $exerciseTitle, $exerciseAttempts), false);
if ($origin != 'learnpath')
Display :: display_footer();
exit;
} else {
Display :: display_warning_message(sprintf(get_lang('ReachedMaxAttemptsAdmin'), $exerciseTitle, $exerciseAttempts), false);
}
}
}
if (!function_exists('convert_date_to_number')) {
function convert_date_to_number($default) {
// 2008-10-12 00:00:00 ---to--> 12345672218 (timestamp)
$parts = split(' ', $default);
list ($d_year, $d_month, $d_day) = split('-', $parts[0]);
list ($d_hour, $d_minute, $d_second) = split(':', $parts[1]);
return mktime($d_hour, $d_minute, $d_second, $d_month, $d_day, $d_year);
}
}
$limit_time_exists = (($Exe_starttime != '0000-00-00 00:00:00') || ($Exe_endtime != '0000-00-00 00:00:00')) ? true : false;
if ($limit_time_exists) {
$exercise_start_time = convert_date_to_number($Exe_starttime);
$exercise_end_time = convert_date_to_number($Exe_endtime);
$time_now = convert_date_to_number(date('Y-m-d H:i:s'));
$permission_to_start = (($time_now - $exercise_start_time) > 0) ? true : false;
if ($_SERVER['REQUEST_METHOD'] != 'POST')
$exercise_timeover = (($time_now - $exercise_end_time) > 0) ? true : false;
if ($permission_to_start == false || $exercise_timeover == true) { //
if (!api_is_allowed_to_edit()) {
$message_warning = ($permission_to_start == false) ? get_lang('ExerciseNoStartedYet') : get_lang('ReachedTimeLimit');
Display :: display_warning_message(sprintf($message_warning, $exerciseTitle, $exerciseAttempts));
Display :: display_footer();
exit;
} else {
$message_warning = ($permission_to_start == false) ? get_lang('ExerciseNoStartedAdmin') : get_lang('ReachedTimeLimitAdmin');
Display :: display_warning_message(sprintf($message_warning, $exerciseTitle, $exerciseAttempts));
}
}
}
if (!empty ($error)) {
Display :: display_error_message($error, false);
} else {
if (!empty ($exerciseSound)) {
echo "<a href=\"../document/download.php?doc_url=%2Faudio%2F" . Security::remove_XSS($exerciseSound) . "\" target=\"_blank\">", "<img src=\"../img/sound.gif\" border=\"0\" align=\"absmiddle\" alt=", get_lang('Sound') .
"\" /></a>";
}
// Get number of hotspot questions for javascript validation
$number_of_hotspot_questions = 0;
$onsubmit = '';
$i = 0;
//i have a doubt in this line cvargas
//var_dump($questionList);
if (!strcmp($questionList[0], '') === 0) {
foreach ($questionList as $questionId) {
$i++;
$objQuestionTmp = Question :: read($questionId);
// for sequential exercises
if ($exerciseType == 2) {
// if it is not the right question, goes to the next loop iteration
if ($questionNum != $i) {
continue;
} else {
if ($objQuestionTmp->selectType() == HOT_SPOT) {
$number_of_hotspot_questions++;
}
break;
}
} else {
if ($objQuestionTmp->selectType() == HOT_SPOT) {
$number_of_hotspot_questions++;
}
}
}
}
if ($number_of_hotspot_questions > 0) {
$onsubmit = "onsubmit=\"return validateFlashVar('" . $number_of_hotspot_questions . "', '" . get_lang('HotspotValidateError1') . "', '" . get_lang('HotspotValidateError2') . "');\"";
}
$s = "<p>$exerciseDescription</p>";
if ($exerciseType == 2)
{
$s2 = "&exerciseId=" . $exerciseId;
}
$s .= " <form method='post' action='" . api_get_self() . "?autocomplete=off&gradebook=$gradebook" . $s2 . "' name='frm_exercise' $onsubmit>
<input type='hidden' name='formSent' value='1' />
<input type='hidden' name='exerciseType' value='" . $exerciseType . "' />
<input type='hidden' name='exerciseId' value='" . $exerciseId . "' />
<input type='hidden' name='questionNum' value='" . $questionNum . "' />
<input type='hidden' name='nbrQuestions' value='" . $nbrQuestions . "' />
<input type='hidden' name='origin' value='" . $origin . "' />
<input type='hidden' name='learnpath_id' value='" . $learnpath_id . "' />
<input type='hidden' name='learnpath_item_id' value='" . $learnpath_item_id . "' />
<table width='100%' border='0' cellpadding='1' cellspacing='0'>
<tr>
<td>
<table width='100%' cellpadding='3' cellspacing='0' border='0'>";
echo $s;
$i = 1;
foreach ($questionList as $questionId) {
// for sequential exercises
if ($exerciseType == 2) {
// if it is not the right question, goes to the next loop iteration
if ($questionNum != $i) {
$i++;
continue;
} else {
if ($exerciseFeedbackType != 1) {
// if the user has already answered this question
if (isset ($exerciseResult[$questionId])) {
// construction of the Question object
$objQuestionTmp = Question :: read($questionId);
$questionName = $objQuestionTmp->selectTitle();
// destruction of the Question object
unset ($objQuestionTmp);
Display :: display_normal_message(get_lang('AlreadyAnswered'));
$i++;
//echo '<tr><td>'.get_lang('AlreadyAnswered').' &quot;'.$questionName.'&quot;</td></tr>';
break;
}
}
}
}
// shows the question and its answers
showQuestion($questionId, false, $origin, $i, $nbrQuestions);
$i++;
// for sequential exercises
if ($exerciseType == 2) {
// quits the loop
break;
}
}
// end foreach()
echo "<!-- <button type='submit' name='buttonCancel' class='cancel'>" . get_lang('Cancel') . "</button>
&nbsp;&nbsp; //--><br />";
echo '<div style="padding-left:10px; margin-top:-10px;">';
$submit_btn = "<button class='next' type='submit' name='submit'>";
// $submit_btn.=get_lang('ValidateAnswer');
if ($objExercise->selectFeedbackType() == 1 && $_SESSION['objExercise']->selectType() == 2) {
$submit_btn = '';
echo '<script src="' . api_get_path(WEB_LIBRARY_PATH) . 'javascript/thickbox.js" type="text/javascript"></script>';
echo '<style type="text/css" media="all">@import "' . api_get_path(WEB_LIBRARY_PATH) . 'javascript/thickbox.css";</style>';
$hotspot_get = $_POST['hotspot'];
// Show a hidden div
echo "<script>$(document).ready( function(){
$('.rounded').corners();
$('.rounded_inner').corners();
});</script>";
//echo '<br /><span class="rounded" style="width: 300px; margin-top: 10px; padding: 3px; background-color:#ccc;"><span style="width: 300px" class="rounded_inner" ><a href="exercise_submit_modal.php?hotspot='.$hotspot_get.'&nbrQuestions='.$nbrQuestions.'&questionnum='.$questionNum.'&exerciseType='.$exerciseType.'&exerciseId='.$exerciseId.'&placeValuesBeforeTB_=savedValues&TB_iframe=true&height=480&width=640&modal=true" title="" class="thickbox" id="validationButton">'.get_lang('ValidateAnswer').'</a></span></span><br /><br /><br />';
} else {
if ($exerciseType == 1 || $nbrQuestions == $questionNum) {
$submit_btn .= get_lang('ValidateAnswer');
} else {
$submit_btn .= get_lang('NextQuestion');
}
$submit_btn .= "</button>";
}
echo $submit_btn;
echo "</table>
</td>
</tr>
</table></form>";
$b = 2;
}
echo '</div>';
if ($_configuration['live_exercise_tracking'] == true && $exerciseFeedbackType != 1) {
//if($questionNum < 2){
if ($table_recorded_not_exist) {
if ($exerciseType == 2) {
api_sql_query("INSERT INTO $stat_table(exe_exo_id,exe_user_id,exe_cours_id,status,session_id,data_tracking,start_date,orig_lp_id,orig_lp_item_id)
VALUES('$exerciseId','" . api_get_user_id() . "','" . $_course['id'] . "','incomplete','" . api_get_session_id() . "','" . implode(',', $questionList) . "','" . date('Y-m-d H:i:s') . "',$safe_lp_id,$safe_lp_item_id)", __FILE__, __LINE__);
} else {
api_sql_query("INSERT INTO $stat_table (exe_exo_id,exe_user_id,exe_cours_id,status,session_id,start_date,orig_lp_id,orig_lp_item_id)
VALUES('$exerciseId','" . api_get_user_id() . "','" . $_course['id'] . "','incomplete','" . api_get_session_id() . "','" . date('Y-m-d H:i:s') . "',$safe_lp_id,$safe_lp_item_id)", __FILE__, __LINE__);
}
}
}
if ($origin != 'learnpath') {
//so we are not in learnpath tool
Display :: display_footer();
}