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- <?php // $Id: question.class.php 22257 2009-07-20 17:50:09Z juliomontoya $
-
- /*
- ==============================================================================
- 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
- ==============================================================================
- */
- /**
- * File containing the Question class.
- * @package dokeos.exercise
- * @author Olivier Brouckaert
- * @version $Id: question.class.php 22257 2009-07-20 17:50:09Z juliomontoya $
- */
- if(!class_exists('Question')):
- // 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);
- /**
- CLASS QUESTION
- *
- * This class allows to instantiate an object of type Question
- *
- * @author Olivier Brouckaert, original author
- * @author Patrick Cool, LaTeX support
- * @package dokeos.exercise
- */
- abstract class Question
- {
- var $id;
- var $question;
- var $description;
- var $weighting;
- var $position;
- var $type;
- var $level;
- var $picture;
- var $exerciseList; // array with the list of exercises which this question is in
- static $typePicture = 'new_question.png';
- static $explanationLangVar = '';
- static $questionTypes = array(
- UNIQUE_ANSWER => array('unique_answer.class.php' , 'UniqueAnswer'),
- MULTIPLE_ANSWER => array('multiple_answer.class.php' , 'MultipleAnswer'),
- FILL_IN_BLANKS => array('fill_blanks.class.php' , 'FillBlanks'),
- MATCHING => array('matching.class.php' , 'Matching'),
- FREE_ANSWER => array('freeanswer.class.php' , 'FreeAnswer'),
- HOT_SPOT => array('hotspot.class.php' , 'HotSpot')
- );
- /**
- * constructor of the class
- *
- * @author - Olivier Brouckaert
- */
- function Question()
- {
- $this->id=0;
- $this->question='';
- $this->description='';
- $this->weighting=0;
- $this->position=1;
- $this->picture='';
- $this->level = 1;
- $this->exerciseList=array();
- }
- /**
- * reads question informations from the data base
- *
- * @author - Olivier Brouckaert
- * @param - integer $id - question ID
- * @return - boolean - true if question exists, otherwise false
- */
- static function read($id)
- {
- global $_course;
- $TBL_EXERCICES = Database::get_course_table(TABLE_QUIZ_TEST);
- $TBL_QUESTIONS = Database::get_course_table(TABLE_QUIZ_QUESTION);
- $TBL_EXERCICE_QUESTION = Database::get_course_table(TABLE_QUIZ_TEST_QUESTION);
- $sql="SELECT question,description,ponderation,position,type,picture,level FROM $TBL_QUESTIONS WHERE id='".Database::escape_string($id)."'";
- $result=api_sql_query($sql,__FILE__,__LINE__);
- // if the question has been found
- if($object=mysql_fetch_object($result))
- {
- $objQuestion = Question::getInstance($object->type);
- $objQuestion->id=$id;
- $objQuestion->question=$object->question;
- $objQuestion->description=$object->description;
- $objQuestion->weighting=$object->ponderation;
- $objQuestion->position=$object->position;
- $objQuestion->type=$object->type;
- $objQuestion->picture=$object->picture;
- $objQuestion->level=(int) $object->level;
- $sql="SELECT exercice_id FROM $TBL_EXERCICE_QUESTION WHERE question_id='".intval($id)."'";
- $result=api_sql_query($sql,__FILE__,__LINE__);
- // fills the array with the exercises which this question is in
- while($object=mysql_fetch_object($result))
- {
- $objQuestion->exerciseList[]=$object->exercice_id;
- }
- return $objQuestion;
- }
- // question not found
- return false;
- }
- /**
- * returns the question ID
- *
- * @author - Olivier Brouckaert
- * @return - integer - question ID
- */
- function selectId()
- {
- return $this->id;
- }
- /**
- * returns the question title
- *
- * @author - Olivier Brouckaert
- * @return - string - question title
- */
- function selectTitle()
- {
- $this->question=api_parse_tex($this->question);
- return $this->question;
- }
- /**
- * returns the question description
- *
- * @author - Olivier Brouckaert
- * @return - string - question description
- */
- function selectDescription()
- {
- $this->description=api_parse_tex($this->description);
- return $this->description;
- }
- /**
- * returns the question weighting
- *
- * @author - Olivier Brouckaert
- * @return - integer - question weighting
- */
- function selectWeighting()
- {
- return $this->weighting;
- }
- /**
- * returns the question position
- *
- * @author - Olivier Brouckaert
- * @return - integer - question position
- */
- function selectPosition()
- {
- return $this->position;
- }
- /**
- * returns the answer type
- *
- * @author - Olivier Brouckaert
- * @return - integer - answer type
- */
- function selectType()
- {
- return $this->type;
- }
- /**
- * returns the level of the question
- *
- * @author - Nicolas Raynaud
- * @return - integer - level of the question, 0 by default.
- */
- function selectLevel()
- {
- return $this->level;
- }
- /**
- * returns the picture name
- *
- * @author - Olivier Brouckaert
- * @return - string - picture name
- */
- function selectPicture()
- {
- return $this->picture;
- }
- /**
- * returns the array with the exercise ID list
- *
- * @author - Olivier Brouckaert
- * @return - array - list of exercise ID which the question is in
- */
- function selectExerciseList()
- {
- return $this->exerciseList;
- }
- /**
- * returns the number of exercises which this question is in
- *
- * @author - Olivier Brouckaert
- * @return - integer - number of exercises
- */
- function selectNbrExercises()
- {
- return sizeof($this->exerciseList);
- }
- /**
- * changes the question title
- *
- * @author - Olivier Brouckaert
- * @param - string $title - question title
- */
- function updateTitle($title)
- {
- $this->question=$title;
- }
- /**
- * changes the question description
- *
- * @author - Olivier Brouckaert
- * @param - string $description - question description
- */
- function updateDescription($description)
- {
- $this->description=$description;
- }
- /**
- * changes the question weighting
- *
- * @author - Olivier Brouckaert
- * @param - integer $weighting - question weighting
- */
- function updateWeighting($weighting)
- {
- $this->weighting=$weighting;
- }
- /**
- * changes the question position
- *
- * @author - Olivier Brouckaert
- * @param - integer $position - question position
- */
- function updatePosition($position)
- {
- $this->position=$position;
- }
- /**
- * changes the question level
- *
- * @author - Nicolas Raynaud
- * @param - integer $level - question level
- */
- function updateLevel($level)
- {
- $this->level=$level;
- }
- /**
- * changes the answer type. If the user changes the type from "unique answer" to "multiple answers"
- * (or conversely) answers are not deleted, otherwise yes
- *
- * @author - Olivier Brouckaert
- * @param - integer $type - answer type
- */
- function updateType($type)
- {
- global $TBL_REPONSES;
- // if we really change the type
- if($type != $this->type)
- {
- // if we don't change from "unique answer" to "multiple answers" (or conversely)
- if(!in_array($this->type,array(UNIQUE_ANSWER,MULTIPLE_ANSWER)) || !in_array($type,array(UNIQUE_ANSWER,MULTIPLE_ANSWER)))
- {
- // removes old answers
- $sql="DELETE FROM $TBL_REPONSES WHERE question_id='".Database::escape_string($this->id)."'";
- api_sql_query($sql,__FILE__,__LINE__);
- }
- $this->type=$type;
- }
- }
- /**
- * adds a picture to the question
- *
- * @author - Olivier Brouckaert
- * @param - string $Picture - temporary path of the picture to upload
- * @param - string $PictureName - Name of the picture
- * @return - boolean - true if uploaded, otherwise false
- */
- function uploadPicture($Picture,$PictureName)
- {
- global $picturePath, $_course, $_user;
- // if the question has got an ID
- if($this->id)
- {
-
- $extension = pathinfo($PictureName, PATHINFO_EXTENSION);
- $this->picture='quiz-'.$this->id.'.jpg';
- if($extension == 'gif' || $extension == 'png')
- {
- $o_img = new image($Picture);
- $o_img->send_image('JPG',$picturePath.'/'.$this->picture);
- $document_id = add_document($_course, '/images/'.$this->picture, 'file', filesize($picturePath.'/'.$this->picture),$this->picture);
- }
- else
- {
- move_uploaded_file($Picture,$picturePath.'/'.$this->picture)?true:false;
- }
- $document_id = add_document($_course, '/images/'.$this->picture, 'file', filesize($picturePath.'/'.$this->picture),$this->picture);
- if($document_id)
- {
- return api_item_property_update($_course, TOOL_DOCUMENT, $document_id, 'DocumentAdded', $_user['user_id']);
- }
- }
- return false;
- }
- /**
- * Resizes a picture || Warning!: can only be called after uploadPicture, or if picture is already available in object.
- *
- * @author - Toon Keppens
- * @param - string $Dimension - Resizing happens proportional according to given dimension: height|width|any
- * @param - integer $Max - Maximum size
- * @return - boolean - true if success, false if failed
- */
- function resizePicture($Dimension, $Max)
- {
- global $picturePath;
- // if the question has an ID
- if($this->id)
- {
- // Get dimensions from current image.
- $current_img = imagecreatefromjpeg($picturePath.'/'.$this->picture);
- $current_image_size = getimagesize($picturePath.'/'.$this->picture);
- $current_height = imagesy($current_img);
- $current_width = imagesx($current_img);
- if($current_image_size[0] < $Max && $current_image_size[1] <$Max)
- return true;
- elseif($current_height == "")
- return false;
- // Resize according to height.
- if ($Dimension == "height")
- {
- $resize_scale = $current_height / $Max;
- $new_height = $Max;
- $new_width = ceil($current_width / $resize_scale);
- }
- // Resize according to width
- if ($Dimension == "width")
- {
- $resize_scale = $current_width / $Max;
- $new_width = $Max;
- $new_height = ceil($current_height / $resize_scale);
- }
- // Resize according to height or width, both should not be larger than $Max after resizing.
- if ($Dimension == "any")
- {
- if ($current_height > $current_width || $current_height == $current_width)
- {
- $resize_scale = $current_height / $Max;
- $new_height = $Max;
- $new_width = ceil($current_width / $resize_scale);
- }
- if ($current_height < $current_width)
- {
- $resize_scale = $current_width / $Max;
- $new_width = $Max;
- $new_height = ceil($current_height / $resize_scale);
- }
- }
- // Create new image
- $new_img = imagecreatetruecolor($new_width, $new_height);
- $bgColor = imagecolorallocate($new_img, 255,255,255);
- imagefill($new_img , 0,0 , $bgColor);
- // Resize image
- imagecopyresized($new_img, $current_img, 0, 0, 0, 0, $new_width, $new_height, $current_width, $current_height);
- // Write image to file
- $result = imagejpeg($new_img, $picturePath.'/'.$this->picture, 100);
- // Delete temperory images, clear memory
- imagedestroy($current_img);
- imagedestroy($new_img);
- if ($result)
- {
- return true;
- }
- else
- {
- return false;
- }
- }
- }
- /**
- * deletes the picture
- *
- * @author - Olivier Brouckaert
- * @return - boolean - true if removed, otherwise false
- */
- function removePicture()
- {
- global $picturePath;
- // if the question has got an ID and if the picture exists
- if($this->id)
- {
- $picture=$this->picture;
- $this->picture='';
- return @unlink($picturePath.'/'.$picture)?true:false;
- }
- return false;
- }
- /**
- * exports a picture to another question
- *
- * @author - Olivier Brouckaert
- * @param - integer $questionId - ID of the target question
- * @return - boolean - true if copied, otherwise false
- */
- function exportPicture($questionId)
- {
- global $TBL_QUESTIONS, $picturePath;
- // if the question has got an ID and if the picture exists
- if($this->id && !empty($this->picture))
- {
- $picture=explode('.',$this->picture);
- $Extension=$picture[sizeof($picture)-1];
- $picture='quiz-'.$questionId.'.'.$Extension;
- $sql="UPDATE $TBL_QUESTIONS SET picture='".Database::escape_string($picture)."' WHERE id='".Database::escape_string($questionId)."'";
- api_sql_query($sql,__FILE__,__LINE__);
- return @copy($picturePath.'/'.$this->picture,$picturePath.'/'.$picture)?true:false;
- }
- return false;
- }
- /**
- * saves the picture coming from POST into a temporary file
- * Temporary pictures are used when we don't want to save a picture right after a form submission.
- * For example, if we first show a confirmation box.
- *
- * @author - Olivier Brouckaert
- * @param - string $Picture - temporary path of the picture to move
- * @param - string $PictureName - Name of the picture
- */
- function setTmpPicture($Picture,$PictureName)
- {
- global $picturePath;
- $PictureName=explode('.',$PictureName);
- $Extension=$PictureName[sizeof($PictureName)-1];
- // saves the picture into a temporary file
- @move_uploaded_file($Picture,$picturePath.'/tmp.'.$Extension);
- }
- /**
- * moves the temporary question "tmp" to "quiz-$questionId"
- * Temporary pictures are used when we don't want to save a picture right after a form submission.
- * For example, if we first show a confirmation box.
- *
- * @author - Olivier Brouckaert
- * @return - boolean - true if moved, otherwise false
- */
- function getTmpPicture()
- {
- global $picturePath;
- // if the question has got an ID and if the picture exists
- if($this->id)
- {
- if(file_exists($picturePath.'/tmp.jpg'))
- {
- $Extension='jpg';
- }
- elseif(file_exists($picturePath.'/tmp.gif'))
- {
- $Extension='gif';
- }
- elseif(file_exists($picturePath.'/tmp.png'))
- {
- $Extension='png';
- }
- $this->picture='quiz-'.$this->id.'.'.$Extension;
- return @rename($picturePath.'/tmp.'.$Extension,$picturePath.'/'.$this->picture)?true:false;
- }
- return false;
- }
- /**
- * updates the question in the data base
- * if an exercise ID is provided, we add that exercise ID into the exercise list
- *
- * @author - Olivier Brouckaert
- * @param - integer $exerciseId - exercise ID if saving in an exercise
- */
- function save($exerciseId=0) {
- global $_course,$_user;
-
- $TBL_EXERCICE_QUESTION = Database::get_course_table(TABLE_QUIZ_TEST_QUESTION);
- $TBL_QUESTIONS = Database::get_course_table(TABLE_QUIZ_QUESTION);
-
- $id=$this->id;
- $question=$this->question;
- $description=$this->description;
- $weighting=$this->weighting;
- $position=$this->position;
- $type=$this->type;
- $picture=$this->picture;
- $level=$this->level;
- // question already exists
- if(!empty($id)) {
- $sql="UPDATE $TBL_QUESTIONS SET
- question ='".Database::escape_string(Security::remove_XSS($question))."',
- description ='".Database::escape_string(Security::remove_XSS(api_html_entity_decode($description),COURSEMANAGERLOWSECURITY))."',
- ponderation ='".Database::escape_string($weighting)."',
- position ='".Database::escape_string($position)."',
- type ='".Database::escape_string($type)."',
- picture ='".Database::escape_string($picture)."',
- level ='".Database::escape_string($level)."'
- WHERE id='".Database::escape_string($id)."'";
- api_sql_query($sql,__FILE__,__LINE__);
- if(!empty($exerciseId)) {
- api_item_property_update($_course, TOOL_QUIZ, $id,'QuizQuestionUpdated',$_user['user_id']);
- }
- if (api_get_setting('search_enabled')=='true') {
- if ($exerciseId != 0) {
- $this -> search_engine_edit($exerciseId);
- } else {
- /**
- * actually there is *not* an user interface for
- * creating questions without a relation with an exercise
- */
- }
- }
- } else {// creates a new question
- $sql="SELECT max(position) FROM $TBL_QUESTIONS as question, $TBL_EXERCICE_QUESTION as test_question WHERE question.id=test_question.question_id AND test_question.exercice_id='".Database::escape_string($exerciseId)."'";
- $result=api_sql_query($sql);
- $current_position=Database::result($result,0,0);
- $this -> updatePosition($current_position+1);
- $position = $this -> position;
-
- $sql="INSERT INTO $TBL_QUESTIONS(question,description,ponderation,position,type,picture,level) VALUES(
- '".Database::escape_string(Security::remove_XSS($question))."',
- '".Database::escape_string(Security::remove_XSS(api_html_entity_decode($description),COURSEMANAGERLOWSECURITY))."',
- '".Database::escape_string($weighting)."',
- '".Database::escape_string($position)."',
- '".Database::escape_string($type)."',
- '".Database::escape_string($picture)."',
- '".Database::escape_string($level)."'
- )";
- api_sql_query($sql,__FILE__,__LINE__);
- $this->id=Database::get_last_insert_id();
-
- api_item_property_update($_course, TOOL_QUIZ, $this->id,'QuizQuestionAdded',$_user['user_id']);
-
- // If hotspot, create first answer
- if ($type == HOT_SPOT || $type == HOT_SPOT_ORDER) {
- $TBL_ANSWERS = Database::get_course_table(TABLE_QUIZ_ANSWER);
- $sql="INSERT INTO $TBL_ANSWERS (`id` , `question_id` , `answer` , `correct` , `comment` , `ponderation` , `position` , `hotspot_coordinates` , `hotspot_type` ) VALUES ('1', '".Database::escape_string($this->id)."', '', NULL , '', '10' , '1', '0;0|0|0', 'square')";
- api_sql_query($sql,__FILE__,__LINE__);
-
- }
- if (api_get_setting('search_enabled')=='true') {
- if ($exerciseId != 0) {
- $this -> search_engine_edit($exerciseId, TRUE);
- } else {
- /**
- * actually there is *not* an user interface for
- * creating questions without a relation with an exercise
- */
- }
- }
- }
- // if the question is created in an exercise
- if($exerciseId) {
- /*
- $sql = 'UPDATE '.Database::get_course_table(TABLE_LP_ITEM).'
- SET max_score = '.intval($weighting).'
- WHERE item_type = "'.TOOL_QUIZ.'"
- AND path='.intval($exerciseId);
- api_sql_query($sql,__FILE__,__LINE__);
- */
- // adds the exercise into the exercise list of this question
- $this->addToList($exerciseId, TRUE);
- }
- }
- function search_engine_edit($exerciseId, $addQs=FALSE, $rmQs=FALSE) {
- // update search engine and its values table if enabled
- if (api_get_setting('search_enabled')=='true' && extension_loaded('xapian')) {
- $course_id = api_get_course_id();
- // get search_did
- $tbl_se_ref = Database::get_main_table(TABLE_MAIN_SEARCH_ENGINE_REF);
- if ($addQs || $rmQs) {
- //there's only one row per question on normal db and one document per question on search engine db
- $sql = 'SELECT * FROM %s WHERE course_code=\'%s\' AND tool_id=\'%s\' AND ref_id_second_level=%s LIMIT 1';
- $sql = sprintf($sql, $tbl_se_ref, $course_id, TOOL_QUIZ, $this->id);
- } else {
- $sql = 'SELECT * FROM %s WHERE course_code=\'%s\' AND tool_id=\'%s\' AND ref_id_high_level=%s AND ref_id_second_level=%s LIMIT 1';
- $sql = sprintf($sql, $tbl_se_ref, $course_id, TOOL_QUIZ, $exerciseId, $this->id);
- }
- $res = api_sql_query($sql, __FILE__, __LINE__);
- if (Database::num_rows($res) > 0 || $addQs) {
- require_once(api_get_path(LIBRARY_PATH) . 'search/DokeosIndexer.class.php');
- require_once(api_get_path(LIBRARY_PATH) . 'search/IndexableChunk.class.php');
- $di = new DokeosIndexer();
- if ($addQs) {
- $question_exercises = array((int)$exerciseId);
- } else {
- $question_exercises = array();
- }
- isset($_POST['language'])? $lang=Database::escape_string($_POST['language']): $lang = 'english';
- $di->connectDb(NULL, NULL, $lang);
- // retrieve others exercise ids
- $se_ref = Database::fetch_array($res);
- $se_doc = $di->get_document((int)$se_ref['search_did']);
- if ($se_doc !== FALSE) {
- if ( ($se_doc_data=$di->get_document_data($se_doc)) !== FALSE ) {
- $se_doc_data = unserialize($se_doc_data);
- if (isset($se_doc_data[SE_DATA]['type']) && $se_doc_data[SE_DATA]['type'] == SE_DOCTYPE_EXERCISE_QUESTION) {
- if (isset($se_doc_data[SE_DATA]['exercise_ids']) && is_array($se_doc_data[SE_DATA]['exercise_ids'])) {
- foreach ($se_doc_data[SE_DATA]['exercise_ids'] as $old_value) {
- if (!in_array($old_value, $question_exercises)) {
- $question_exercises[] = $old_value;
- }
- }
- }
- }
- }
- }
- if ($rmQs) {
- while ( ($key=array_search($exerciseId, $question_exercises)) !== FALSE) {
- unset($question_exercises[$key]);
- }
- }
- // build the chunk to index
- $ic_slide = new IndexableChunk();
- $ic_slide->addValue("title", $this->question);
- $ic_slide->addCourseId($course_id);
- $ic_slide->addToolId(TOOL_QUIZ);
- $xapian_data = array(
- SE_COURSE_ID => $course_id,
- SE_TOOL_ID => TOOL_QUIZ,
- SE_DATA => array('type' => SE_DOCTYPE_EXERCISE_QUESTION, 'exercise_ids' => $question_exercises, 'question_id' => (int)$this->id),
- SE_USER => (int)api_get_user_id(),
- );
- $ic_slide->xapian_data = serialize($xapian_data);
- $ic_slide->addValue("content", $this->description);
- //TODO: index answers, see also form validation on question_admin.inc.php
- $di->remove_document((int)$se_ref['search_did']);
- $di->addChunk($ic_slide);
- //index and return search engine document id
- if (!empty($question_exercises)) { // if empty there is nothing to index
- $did = $di->index();
- unset($di);
- }
- if ($did || $rmQs) {
- // save it to db
- if ($addQs || $rmQs) {
- $sql = 'DELETE FROM %s WHERE course_code=\'%s\' AND tool_id=\'%s\' AND ref_id_second_level=\'%s\'';
- $sql = sprintf($sql, $tbl_se_ref, $course_id, TOOL_QUIZ, $this->id);
- } else {
- $sql = 'DELETE FROM %s WHERE course_code=\'%s\' AND tool_id=\'%s\' AND ref_id_high_level=\'%s\' AND ref_id_second_level=\'%s\'';
- $sql = sprintf($sql, $tbl_se_ref, $course_id, TOOL_QUIZ, $exerciseId, $this->id);
- }
- api_sql_query($sql,__FILE__,__LINE__);
- if ($rmQs) {
- if (!empty($question_exercises)) {
- $sql = 'INSERT INTO %s (id, course_code, tool_id, ref_id_high_level, ref_id_second_level, search_did)
- VALUES (NULL , \'%s\', \'%s\', %s, %s, %s)';
- $sql = sprintf($sql, $tbl_se_ref, $course_id, TOOL_QUIZ, array_shift($question_exercises), $this->id, $did);
- api_sql_query($sql,__FILE__,__LINE__);
- }
- } else {
- $sql = 'INSERT INTO %s (id, course_code, tool_id, ref_id_high_level, ref_id_second_level, search_did)
- VALUES (NULL , \'%s\', \'%s\', %s, %s, %s)';
- $sql = sprintf($sql, $tbl_se_ref, $course_id, TOOL_QUIZ, $exerciseId, $this->id, $did);
- api_sql_query($sql,__FILE__,__LINE__);
- }
- }
- }
- }
- }
- /**
- * adds an exercise into the exercise list
- *
- * @author - Olivier Brouckaert
- * @param - integer $exerciseId - exercise ID
- * @param - boolean $fromSave - comming from $this->save() or not
- */
- function addToList($exerciseId, $fromSave=FALSE) {
- global $TBL_EXERCICE_QUESTION;
- $id=$this->id;
- // checks if the exercise ID is not in the list
- if(!in_array($exerciseId,$this->exerciseList)) {
- $this->exerciseList[]=$exerciseId;
- $sql="INSERT INTO $TBL_EXERCICE_QUESTION (question_id, exercice_id) VALUES('".Database::escape_string($id)."','".Database::escape_string($exerciseId)."')";
- api_sql_query($sql,__FILE__,__LINE__);
- // we do not want to reindex if we had just saved adnd indexed the question
- if (!$fromSave) {
- $this->search_engine_edit($exerciseId, TRUE);
- }
- }
- }
- /**
- * removes an exercise from the exercise list
- *
- * @author - Olivier Brouckaert
- * @param - integer $exerciseId - exercise ID
- * @return - boolean - true if removed, otherwise false
- */
- function removeFromList($exerciseId) {
- global $TBL_EXERCICE_QUESTION;
- $id=$this->id;
- // searches the position of the exercise ID in the list
- $pos=array_search($exerciseId,$this->exerciseList);
- // exercise not found
- if($pos === false) {
- return false;
- } else {
- // deletes the position in the array containing the wanted exercise ID
- unset($this->exerciseList[$pos]);
- //update order of other elements
- $sql = "SELECT question_order FROM $TBL_EXERCICE_QUESTION WHERE question_id='".Database::escape_string($id)."' AND exercice_id='".Database::escape_string($exerciseId)."'";
- $res = api_sql_query($sql,__FILE__,__LINE__);
- if (Database::num_rows($res)>0) {
- $row = Database::fetch_array($res);
- if (!empty($row['question_order'])) {
- $sql = "UPDATE $TBL_EXERCICE_QUESTION SET question_order = question_order-1 WHERE exercice_id='".Database::escape_string($exerciseId)."' AND question_order > ".$row['question_order'];
- $res = api_sql_query($sql,__FILE__,__LINE__);
- }
- }
- $sql="DELETE FROM $TBL_EXERCICE_QUESTION WHERE question_id='".Database::escape_string($id)."' AND exercice_id='".Database::escape_string($exerciseId)."'";
- api_sql_query($sql,__FILE__,__LINE__);
- return true;
- }
- }
- /**
- * deletes a question from the database
- * the parameter tells if the question is removed from all exercises (value = 0),
- * or just from one exercise (value = exercise ID)
- *
- * @author - Olivier Brouckaert
- * @param - integer $deleteFromEx - exercise ID if the question is only removed from one exercise
- */
- function delete($deleteFromEx=0) {
- global $_course,$_user;
-
- $TBL_EXERCICE_QUESTION = Database::get_course_table(TABLE_QUIZ_TEST_QUESTION);
- $TBL_QUESTIONS = Database::get_course_table(TABLE_QUIZ_QUESTION);
- $TBL_REPONSES = Database::get_course_table(TABLE_QUIZ_ANSWER);
-
- $id=$this->id;
- // if the question must be removed from all exercises
- if(!$deleteFromEx)
- {
- //update the question_order of each question to avoid inconsistencies
- $sql = "SELECT exercice_id, question_order FROM $TBL_EXERCICE_QUESTION WHERE question_id='".Database::escape_string($id)."'";
- $res = api_sql_query($sql,__FILE__,__LINE__);
- if (Database::num_rows($res)>0) {
- while ($row = Database::fetch_array($res)) {
- if (!empty($row['question_order'])) {
- $sql = "UPDATE $TBL_EXERCICE_QUESTION SET question_order = question_order-1 WHERE exercice_id='".Database::escape_string($row['exercice_id'])."' AND question_order > ".$row['question_order'];
- $res = api_sql_query($sql,__FILE__,__LINE__);
- }
- }
- }
- $sql="DELETE FROM $TBL_EXERCICE_QUESTION WHERE question_id='".Database::escape_string($id)."'";
- api_sql_query($sql,__FILE__,__LINE__);
- $sql="DELETE FROM $TBL_QUESTIONS WHERE id='".Database::escape_string($id)."'";
- api_sql_query($sql,__FILE__,__LINE__);
- $sql="DELETE FROM $TBL_REPONSES WHERE question_id='".Database::escape_string($id)."'";
- api_sql_query($sql,__FILE__,__LINE__);
-
- api_item_property_update($_course, TOOL_QUIZ, $id,'QuizQuestionDeleted',$_user['user_id']);
- $this->removePicture();
- // resets the object
- $this->Question();
- }
- // just removes the exercise from the list
- else
- {
- $this->removeFromList($deleteFromEx);
- if (api_get_setting('search_enabled')=='true' && extension_loaded('xapian')) {
- // disassociate question with this exercise
- $this -> search_engine_edit($deleteFromEx, FALSE, TRUE);
- }
- api_item_property_update($_course, TOOL_QUIZ, $id,'QuizQuestionDeleted',$_user['user_id']);
- }
- }
- /**
- * duplicates the question
- *
- * @author - Olivier Brouckaert
- * @return - integer - ID of the new question
- */
- function duplicate() {
- global $TBL_QUESTIONS, $picturePath;
- $question=$this->question;
- $description=$this->description;
- $weighting=$this->weighting;
- $position=$this->position;
- $type=$this->type;
- $sql="INSERT INTO $TBL_QUESTIONS(question,description,ponderation,position,type) VALUES('".Database::escape_string($question)."','".Database::escape_string($description)."','".Database::escape_string($weighting)."','".Database::escape_string($position)."','".Database::escape_string($type)."')";
- api_sql_query($sql,__FILE__,__LINE__);
- $id=Database::get_last_insert_id();
- // duplicates the picture
- $this->exportPicture($id);
- return $id;
- }
- /**
- * Returns an instance of the class corresponding to the type
- * @param integer $type the type of the question
- * @return an instance of a Question subclass (or of Questionc class by default)
- */
- static function getInstance ($type) {
- if (!is_null($type)) {
- list($file_name,$class_name) = self::$questionTypes[$type];
- include_once($file_name);
- if (class_exists($class_name)) {
- return new $class_name();
- } else {
- echo 'Can\'t instanciate class '.$class_name.' of type '.$type;
- return null;
- }
- }
- }
- /**
- * Creates the form to create / edit a question
- * A subclass can redifine this function to add fields...
- * @param FormValidator $form the formvalidator instance (by reference)
- */
- function createForm (&$form,$fck_config=0)
- {
- echo ' <style>
- div.row div.label{ width: 10%; }
- div.row div.formw{ width: 89%; }
- </style>';
-
- echo '<script>
- function show_media()
- {
- if(document.getElementById(\'media\').style.display == \'none\') {
- document.getElementById(\'media\').style.display = \'block\';
- document.getElementById(\'media_icon\').innerHTML=\' <img style="vertical-align: middle;" src="../img/looknfeelna.png" alt="" /> '.get_lang('EnrichQuestion').'\';
- } else {
- document.getElementById(\'media\').style.display = \'none\';
- document.getElementById(\'media_icon\').innerHTML=\' <img style="vertical-align: middle;" src="../img/looknfeel.png" alt="" /> '.get_lang('EnrichQuestion').'\';
- }
- }
- </script>';
-
- $renderer = $form->defaultRenderer();
- $form->addElement('html','<div class="form">');
- // question name
- $form->addElement('text','questionName','<span class="form_required">*</span> '.get_lang('Question'),'size="80"');
- //$form->applyFilter('questionName','html_filter');
-
- //$radios_results_enabled[] = $form->createElement('static', null, null, null);
- //$test=FormValidator :: createElement ('text', 'questionName');
- //$radios_results_enabled[]=$test;
- // question level
-
- $select_level = array (1,2,3,4,5);
- //$radios_results_enabled[] =
- foreach($select_level as $val) {
- $radios_results_enabled[] = FormValidator :: createElement ('radio', null, null,$val,$val);
- }
- $form->addGroup($radios_results_enabled,'questionLevel',get_lang('Difficulty'));
-
- $renderer->setElementTemplate('<div class="row"><div class="label">{label}</div><div class="formw" >{element}</div></div>','questionName');
- $renderer->setElementTemplate('<div class="row"><div class="label">{label}</div><div class="formw">{element}</div></div>','questionLevel');
- $form->addRule('questionName', get_lang('GiveQuestion'), 'required');
- // question type
- $answerType= intval($_REQUEST['answerType']);
- $form->addElement('hidden','answerType',$_REQUEST['answerType']);
- // html editor
- $editor_config = array('ToolbarSet' => 'TestQuestionDescription', 'Width' => '100%', 'Height' => '150');
- if(is_array($fck_config)){
- $editor_config = array_merge($editor_config, $fck_config);
- }
- if(!api_is_allowed_to_edit()) $editor_config['UserStatus'] = 'student';
- $form -> addElement('html','<div class="row">
- <div class="label"></div>
- <div class="formw" style="height:50px">
- <a href="javascript://" onclick=" return show_media()"> <span id="media_icon"> <img style="vertical-align: middle;" src="../img/looknfeel.png" alt="" /> '.get_lang('EnrichQuestion').'</span></a>
- </div>
- </div>');
- $form -> addElement ('html','<div id="media" style="display:none;">');
- $form->add_html_editor('questionDescription', get_lang('langQuestionDescription'), false, false, $editor_config);
- $form -> addElement ('html','</div>');
- $renderer->setElementTemplate('<div class="row"><div class="label">{label}</div><div class="formw">{element}</div></div>','questionDescription');
- // hidden values
- $form->addElement('hidden','myid',$_REQUEST['myid']);
- switch($answerType) {
- case 1: $this->question = get_lang('langDefaultUniqueQuestion'); break;
- case 2: $this->question = get_lang('langDefaultMultipleQuestion'); break;
- case 3: $this->question = get_lang('langDefaultFillBlankQuestion'); break;
- case 4: $this->question = get_lang('langDefaultMathingQuestion'); break;
- case 5: $this->question = get_lang('langDefaultOpenQuestion'); break;
- }
- $form->addElement('html','</div>');
- // default values
- $defaults = array();
- $defaults['questionName'] = $this -> question;
- $defaults['questionDescription'] = $this -> description;
- $defaults['questionLevel'] = $this -> level;
- $form -> setDefaults($defaults);
- }
- /**
- * function which process the creation of questions
- * @param FormValidator $form the formvalidator instance
- * @param Exercise $objExercise the Exercise instance
- */
- function processCreation ($form, $objExercise) {
- $this -> updateTitle($form->getSubmitValue('questionName'));
- $this -> updateDescription($form->getSubmitValue('questionDescription'));
- $this -> updateLevel($form->getSubmitValue('questionLevel'));
- $this -> save($objExercise -> id);
- // modify the exercise
- $objExercise->addToList($this -> id);
- $objExercise->update_question_positions();
- }
- /**
- * abstract function which creates the form to create / edit the answers of the question
- * @param the formvalidator instance
- */
- abstract function createAnswersForm ($form);
- /**
- * abstract function which process the creation of answers
- * @param the formvalidator instance
- */
- abstract function processAnswersCreation ($form);
- /**
- * Displays the menu of question types
- */
- static function display_type_menu ($feedbacktype = 0)
- {
- global $exerciseId;
- // 1. by default we show all the question types
- $question_type_custom_list = self::$questionTypes;
-
- if (!isset($feedbacktype)) $feedbacktype=0;
- if ($feedbacktype==1) {
- //2. but if it is a feedback DIRECT we only show the UNIQUE_ANSWER type that is currently available
- $question_type_custom_list = array ( UNIQUE_ANSWER => self::$questionTypes[UNIQUE_ANSWER]);
- }
- echo '<ul class="question_menu" style="padding:0px; margin:-2px;">';
- foreach ($question_type_custom_list as $i=>$a_type) {
- // include the class of the type
- include_once($a_type[0]);
- // get the picture of the type and the langvar which describes it
- eval('$img = '.$a_type[1].'::$typePicture;');
- eval('$explanation = get_lang('.$a_type[1].'::$explanationLangVar);');
- echo '<li>';
- echo '<div class="icon_image_content">';
- echo '<a href="admin.php?newQuestion=yes&answerType='.$i.'">'.Display::return_icon($img, $explanation).'</a>';
- echo '<br>';
- echo '<a href="admin.php?newQuestion=yes&answerType='.$i.'">'.$explanation.'</a>';
- echo '</div>';
- echo '</li>';
- }
- echo '<li>';
- echo '<div class="icon_image_content">';
- if ($feedbacktype==1) {
- echo $url = '<a href="question_pool.php?type=1&fromExercise='.$exerciseId.'">';
- } else {
- echo $url = '<a href="question_pool.php?fromExercise='.$exerciseId.'">';
- }
- echo Display::return_icon('database.png', get_lang('GetExistingQuestion'), '');
- echo '</a><br>';
- echo $url;
- echo get_lang('GetExistingQuestion');
- echo '</a>';
- echo '</div></li>';
- echo '</ul>';
- }
-
- static function get_types_information()
- {
- return self::$questionTypes;
- }
- }
- endif;
- ?>
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