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restore file

Isaac Flores 15 years ago
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295832efe2
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      main/exercice/exercice_submit.php

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main/exercice/exercice_submit.php

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+<?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;
+  $htmlHeadXtra[] = '<script src="'.api_get_path(WEB_LIBRARY_PATH).'javascript/jquery.js" type="text/javascript" language="javascript"></script>'; //jQuery
+if (api_get_setting('show_glossary_in_extra_tools') == 'true') {
+  $htmlHeadXtra[] = '<script src="'.api_get_path(WEB_LIBRARY_PATH).'javascript/glossary.js" type="text/javascript" language="javascript"></script>'; //Glossary
+  $htmlHeadXtra[] = '<script src="'.api_get_path(WEB_LIBRARY_PATH).'javascript/jquery.highlight.js" type="text/javascript" language="javascript"></script>'; 
+ }
+ $htmlHeadXtra[] = '<script src="'.api_get_path(WEB_LIBRARY_PATH).'javascript/jquery.corners.min.js" type="text/javascript"></script>';
+/* ------------	ACCESS RIGHTS ------------ */
+// notice for unauthorized people.
+api_protect_course_script(true);
+
+require_once api_get_path(LIBRARY_PATH) . 'text.lib.php';
+
+$is_allowedToEdit = api_is_allowed_to_edit(null,true);
+
+$_configuration['live_exercise_tracking'] = true;
+$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 = Database::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;
+	$result_select = Database::query($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';
+			$result = Database::query($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";
+									$res = Database::query($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) {
+								$answer = $choice;
+								exercise_attempt($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);
+						Database::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";
+		}
+		if ( api_is_allowed_to_session_edit() ) {
+			// 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);
+					Database::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 ();
+		} else {
+			header("Location: exercice_submit.php?exerciseId=$exerciseId");
+			exit;
+		}
+	}
+	if ($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) . '";';
+	$rs = Database::query($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");
+		if (!api_is_allowed_to_session_edit() ) {
+			Display :: display_warning_message(get_lang('SessionIsReadOnly'));
+		}
+} 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=' . $objExercise->id . '">' . get_lang('ModifyExercise') . '</a>';
+	echo '</div>';
+}
+
+echo '<div id="highlight-plugin" class="glossary-content">';
+$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'] . "'";
+
+	$aquery = Database::query($sql, __FILE__, __LINE__);
+	$attempt = Database :: fetch_array($aquery);
+
+	if ($attempt[0] >= $exerciseAttempts) {
+		if (!api_is_allowed_to_edit(null,true)) {
+			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(null,true)) {
+			$message_warning = ($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 (api_is_allowed_to_session_edit() ) {
+			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) {
+			Database::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 {
+			Database::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
+  echo '</div>'; //End glossary div
+	Display :: display_footer();
+} else {
+	echo '</body></html>';
+}