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849 lines
22 KiB
849 lines
22 KiB
<?php
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/*
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==============================================================================
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Dokeos - elearning and course management software
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Copyright (c) 2004-2008 Dokeos SPRL
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For a full list of contributors, see "credits.txt".
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The full license can be read in "license.txt".
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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See the GNU General Public License for more details.
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Contact address: Dokeos, rue du Corbeau, 108, B-1030 Brussels, Belgium
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Mail: info@dokeos.com
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==============================================================================
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*/
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/**
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* Exercise class: This class allows to instantiate an object of type Exercise
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* @package dokeos.exercise
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* @author Olivier Brouckaert
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* @version $Id: exercise.class.php 16072 2008-08-26 18:11:13Z juliomontoya $
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*/
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if(!class_exists('Exercise')):
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class Exercise
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{
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var $id;
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var $exercise;
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var $description;
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var $sound;
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var $type;
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var $random;
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var $active;
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var $timeLimit;
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var $attempts;
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var $questionList; // array with the list of this exercise's questions
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/**
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* constructor of the class
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*
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* @author - Olivier Brouckaert
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*/
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function Exercise()
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{
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$this->id=0;
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$this->exercise='';
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$this->description='';
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$this->sound='';
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$this->type=1;
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$this->random=0;
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$this->active=1;
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$this->questionList=array();
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$this->timeLimit = 0;
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}
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/**
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* reads exercise informations from the data base
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*
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* @author - Olivier Brouckaert
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* @param - integer $id - exercise ID
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* @return - boolean - true if exercise exists, otherwise false
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*/
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function read($id)
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{
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global $_course;
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$TBL_EXERCICE_QUESTION = Database::get_course_table(TABLE_QUIZ_TEST_QUESTION);
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$TBL_EXERCICES = Database::get_course_table(TABLE_QUIZ_TEST);
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$TBL_QUESTIONS = Database::get_course_table(TABLE_QUIZ_QUESTION);
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#$TBL_REPONSES = Database::get_course_table(TABLE_QUIZ_ANSWER);
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$sql="SELECT title,description,sound,type,random,active, results_disabled, max_attempt FROM $TBL_EXERCICES WHERE id='".Database::escape_string($id)."'";
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$result=api_sql_query($sql,__FILE__,__LINE__);
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// if the exercise has been found
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if($object=Database::fetch_object($result))
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{
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$this->id=$id;
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$this->exercise=$object->title;
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$this->description=$object->description;
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$this->sound=$object->sound;
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$this->type=$object->type;
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$this->random=$object->random;
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$this->active=$object->active;
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$this->results_disabled =$object->results_disabled;
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$this->attempts = $object->max_attempt;
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$sql="SELECT question_id, question_order FROM $TBL_EXERCICE_QUESTION,$TBL_QUESTIONS WHERE question_id=id AND exercice_id='".Database::escape_string($id)."' ORDER BY question_order";
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$result=api_sql_query($sql,__FILE__,__LINE__);
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// fills the array with the question ID for this exercise
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// the key of the array is the question position
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while($object=Database::fetch_object($result))
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{
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// makes sure that the question position is unique
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while(isset($this->questionList[$object->question_order]))
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{
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$object->question_order++;
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}
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$this->questionList[$object->question_order]=$object->question_id;
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}
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return true;
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}
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// exercise not found
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return false;
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}
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/**
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* returns the exercise ID
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*
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* @author - Olivier Brouckaert
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* @return - integer - exercise ID
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*/
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function selectId()
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{
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return $this->id;
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}
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/**
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* returns the exercise title
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*
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* @author - Olivier Brouckaert
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* @return - string - exercise title
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*/
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function selectTitle()
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{
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return $this->exercise;
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}
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/**
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* returns the number of attempts setted
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*
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* @return - numeric - exercise attempts
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*/
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function selectAttempts()
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{
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return $this->attempts;
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}
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/**
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* returns the time limit
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*/
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function selectTimeLimit()
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{
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return $this->timeLimit;
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}
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/**
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* returns the exercise description
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*
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* @author - Olivier Brouckaert
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* @return - string - exercise description
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*/
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function selectDescription()
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{
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return $this->description;
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}
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/**
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* returns the exercise sound file
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*
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* @author - Olivier Brouckaert
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* @return - string - exercise description
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*/
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function selectSound()
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{
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return $this->sound;
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}
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/**
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* returns the exercise type
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*
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* @author - Olivier Brouckaert
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* @return - integer - exercise type
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*/
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function selectType()
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{
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return $this->type;
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}
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/**
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* tells if questions are selected randomly, and if so returns the draws
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*
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* @author - Olivier Brouckaert
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* @return - integer - 0 if not random, otherwise the draws
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*/
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function isRandom()
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{
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if($this->random > 0){
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return true;
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}
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else{
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return false;
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}
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}
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/**
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* Same as isRandom() but has a name applied to values different than 0 or 1
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*/
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function getShuffle()
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{
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return $this->random;
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}
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/**
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* returns the exercise status (1 = enabled ; 0 = disabled)
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*
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* @author - Olivier Brouckaert
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* @return - boolean - true if enabled, otherwise false
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*/
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function selectStatus()
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{
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return $this->active;
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}
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/**
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* returns the array with the question ID list
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*
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* @author - Olivier Brouckaert
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* @return - array - question ID list
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*/
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function selectQuestionList()
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{
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return $this->questionList;
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}
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/**
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* returns the number of questions in this exercise
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*
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* @author - Olivier Brouckaert
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* @return - integer - number of questions
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*/
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function selectNbrQuestions()
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{
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return sizeof($this->questionList);
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}
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/**
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* selects questions randomly in the question list
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*
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* @author - Olivier Brouckaert
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* @return - array - if the exercise is not set to take questions randomly, returns the question list
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* without randomizing, otherwise, returns the list with questions selected randomly
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*/
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function selectRandomList()
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{
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$nbQuestions = $this->selectNbrQuestions();
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//Not a random exercise, or if there are not at least 2 questions
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if($this->random == 0 || $nbQuestions < 2)
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{
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return $this->questionList;
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}
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$randQuestionList = array();
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$alreadyChosen = array();
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for($i=0; $i < $this->random; $i++)
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{
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if($i < $nbQuestions){
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do
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{
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$rand=rand(1,$nbQuestions);
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}
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while(in_array($rand,$alreadyChosen));
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$alreadyChosen[]=$rand;
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$randQuestionList[$rand] = $this->questionList[$rand];
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}
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}
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return $randQuestionList;
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}
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/**
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* returns 'true' if the question ID is in the question list
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*
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* @author - Olivier Brouckaert
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* @param - integer $questionId - question ID
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* @return - boolean - true if in the list, otherwise false
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*/
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function isInList($questionId)
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{
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return in_array($questionId,$this->questionList);
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}
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/**
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* changes the exercise title
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*
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* @author - Olivier Brouckaert
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* @param - string $title - exercise title
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*/
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function updateTitle($title)
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{
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$this->exercise=$title;
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}
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/**
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* changes the exercise max attempts
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*
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* @param - numeric $attempts - exercise max attempts
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*/
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function updateAttempts($attempts)
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{
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$this->attempts=$attempts;
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}
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/**
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* changes the exercise description
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*
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* @author - Olivier Brouckaert
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* @param - string $description - exercise description
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*/
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function updateDescription($description)
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{
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$this->description=$description;
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}
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/**
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* changes the exercise sound file
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*
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* @author - Olivier Brouckaert
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* @param - string $sound - exercise sound file
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* @param - string $delete - ask to delete the file
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*/
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function updateSound($sound,$delete)
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{
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global $audioPath, $documentPath,$_course, $_user;
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$TBL_DOCUMENT = Database::get_course_table(TABLE_DOCUMENT);
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$TBL_ITEM_PROPERTY = Database::get_course_table(TABLE_ITEM_PROPERTY);
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if($sound['size'] && (strstr($sound['type'],'audio') || strstr($sound['type'],'video')))
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{
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$this->sound=$sound['name'];
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if(@move_uploaded_file($sound['tmp_name'],$audioPath.'/'.$this->sound))
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{
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$query="SELECT 1 FROM $TBL_DOCUMENT "
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." WHERE path='".str_replace($documentPath,'',$audioPath).'/'.$this->sound."'";
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$result=api_sql_query($query,__FILE__,__LINE__);
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if(!mysql_num_rows($result))
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{
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/*$query="INSERT INTO $TBL_DOCUMENT(path,filetype) VALUES "
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." ('".str_replace($documentPath,'',$audioPath).'/'.$this->sound."','file')";
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api_sql_query($query,__FILE__,__LINE__);*/
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$id = add_document($_course,str_replace($documentPath,'',$audioPath).'/'.$this->sound,'file',$sound['size'],$sound['name']);
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//$id = Database::get_last_insert_id();
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//$time = time();
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//$time = date("Y-m-d H:i:s", $time);
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// insert into the item_property table, using default visibility of "visible"
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/*$query = "INSERT INTO $TBL_ITEM_PROPERTY "
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."(tool, ref, insert_user_id,to_group_id, insert_date, lastedit_date, lastedit_type) "
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." VALUES "
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."('".TOOL_DOCUMENT."', $id, $_user['user_id'], 0, '$time', '$time', 'DocumentAdded' )";
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api_sql_query($query,__FILE__,__LINE__);*/
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api_item_property_update($_course, TOOL_DOCUMENT, $id, 'DocumentAdded',$_user['user_id']);
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item_property_update_on_folder($_course,str_replace($documentPath,'',$audioPath),$_user['user_id']);
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}
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}
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}
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elseif($delete && is_file($audioPath.'/'.$this->sound))
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{
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$this->sound='';
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}
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}
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/**
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* changes the exercise type
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*
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* @author - Olivier Brouckaert
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* @param - integer $type - exercise type
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*/
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function updateType($type)
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{
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$this->type=$type;
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}
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/**
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* sets to 0 if questions are not selected randomly
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* if questions are selected randomly, sets the draws
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*
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* @author - Olivier Brouckaert
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* @param - integer $random - 0 if not random, otherwise the draws
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*/
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function setRandom($random)
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{
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$this->random=$random;
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}
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/**
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* enables the exercise
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*
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* @author - Olivier Brouckaert
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*/
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function enable()
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{
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$this->active=1;
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}
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/**
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* disables the exercise
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*
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* @author - Olivier Brouckaert
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*/
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function disable()
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{
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$this->active=0;
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}
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function disable_results()
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{
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$this->results_disabled = true;
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}
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function enable_results()
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{
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$this->results_disabled = false;
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}
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/**
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* updates the exercise in the data base
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*
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* @author - Olivier Brouckaert
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*/
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function save()
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{
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$TBL_EXERCICES = Database::get_course_table(TABLE_QUIZ_TEST);
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$TBL_QUESTIONS = Database::get_course_table(TABLE_QUIZ_QUESTION);
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$TBL_QUIZ_QUESTION= Database::get_course_table(TABLE_QUIZ_TEST_QUESTION);
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$id=$this->id;
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$exercise=addslashes($this->exercise);
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$description=addslashes($this->description);
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$sound=addslashes($this->sound);
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$type=$this->type;
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$attempts=$this->attempts;
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$random=$this->random;
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$active=$this->active;
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$results_disabled = intval($this->results_disabled);
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// exercise already exists
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if($id)
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{
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$sql="UPDATE $TBL_EXERCICES SET
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title='".Database::escape_string($exercise)."',
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description='".Database::escape_string($description)."',
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sound='".Database::escape_string($sound)."',
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type='".Database::escape_string($type)."',
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random='".Database::escape_string($random)."',
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active='".Database::escape_string($active)."',
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max_attempt='".Database::escape_string($attempts)."', " .
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"results_disabled='".Database::escape_string($results_disabled)."'
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WHERE id='".Database::escape_string($id)."'";
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api_sql_query($sql,__FILE__,__LINE__);
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}
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// creates a new exercise
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else
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{
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$sql="INSERT INTO $TBL_EXERCICES(title,description,sound,type,random,active, results_disabled, max_attempt)
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VALUES(
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'".Database::escape_string($exercise)."',
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'".Database::escape_string($description)."',
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'".Database::escape_string($sound)."',
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'".Database::escape_string($type)."',
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'".Database::escape_string($random)."',
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'".Database::escape_string($active)."',
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'".Database::escape_string($results_disabled)."',
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'".Database::escape_string($attempts)."'
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)";
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api_sql_query($sql,__FILE__,__LINE__);
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$this->id=mysql_insert_id();
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}
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// updates the question position
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foreach($this->questionList as $position=>$questionId)
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{
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//$sql="UPDATE $TBL_QUESTIONS SET position='".Database::escape_string($position)."' WHERE id='".Database::escape_string($questionId)."'";
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$sql="UPDATE $TBL_QUIZ_QUESTION SET question_order='".Database::escape_string($position)."' " .
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"WHERE question_id='".Database::escape_string($questionId)."' and exercice_id='".Database::escape_string($id)."'";
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api_sql_query($sql,__FILE__,__LINE__);
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}
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}
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/**
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* moves a question up in the list
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*
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* @author - Olivier Brouckaert
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* @author - Julio Montoya (rewrote the code)
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* @param - integer $id - question ID to move up
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*/
|
|
function moveUp($id)
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{
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// there is a bug with some version of PHP with the key and prev functions
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// the script commented was tested in dev.dokeos.com with no success
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// Instead of using prev and next this was change with arrays.
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/*
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foreach($this->questionList as $position=>$questionId)
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{
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// if question ID found
|
|
if($questionId == $id)
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{
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// position of question in the array
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echo $pos1=$position; //1
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echo "<br>";
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prev($this->questionList);
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prev($this->questionList);
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// position of previous question in the array
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$pos2=key($this->questionList);
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//if the cursor of the array hit the end
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// then we must reset the array to get the previous key
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if($pos2===null)
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{
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end($this->questionList);
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prev($this->questionList);
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$pos2=key($this->questionList);
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}
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// error, can't move question
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if(!$pos2)
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{
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//echo 'cant move!';
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$pos2=key($this->questionList);
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reset($this->questionList);
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}
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$id2=$this->questionList[$pos2];
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// exits foreach()
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break;
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}
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$i++;
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}
|
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*/
|
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$question_list =array();
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foreach($this->questionList as $position=>$questionId)
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{
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$question_list[]= $questionId;
|
|
}
|
|
$len=count($question_list);
|
|
$orderlist=array_keys($this->questionList);
|
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for($i=0;$i<$len;$i++)
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{
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$questionId = $question_list[$i];
|
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if($questionId == $id)
|
|
{
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// position of question in the array
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|
$pos1=$orderlist[$i];
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$pos2=$orderlist[$i-1];
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|
if($pos2===null)
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|
{
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|
$pos2 = $orderlist[$len-1];
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|
}
|
|
// error, can't move question
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|
if(!$pos2)
|
|
{
|
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$pos2=$orderlist[0];
|
|
$i=0;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
// permutes questions in the array
|
|
$temp=$this->questionList[$pos2];
|
|
$this->questionList[$pos2]=$this->questionList[$pos1];
|
|
$this->questionList[$pos1]=$temp;
|
|
}
|
|
|
|
/**
|
|
* moves a question down in the list
|
|
*
|
|
* @author - Olivier Brouckaert
|
|
* @param - integer $id - question ID to move down
|
|
*/
|
|
function moveDown($id)
|
|
{
|
|
// there is a bug with some version of PHP with the key and prev functions
|
|
// the script commented was tested in dev.dokeos.com with no success
|
|
// Instead of using prev and next this was change with arrays.
|
|
|
|
/*
|
|
foreach($this->questionList as $position=>$questionId)
|
|
{
|
|
// if question ID found
|
|
if($questionId == $id)
|
|
{
|
|
// position of question in the array
|
|
$pos1=$position;
|
|
|
|
//next($this->questionList);
|
|
|
|
// position of next question in the array
|
|
$pos2=key($this->questionList);
|
|
|
|
// error, can't move question
|
|
if(!$pos2)
|
|
{
|
|
//echo 'cant move!';
|
|
return;
|
|
}
|
|
|
|
$id2=$this->questionList[$pos2];
|
|
|
|
// exits foreach()
|
|
break;
|
|
}
|
|
}
|
|
*/
|
|
|
|
$question_list =array();
|
|
foreach($this->questionList as $position=>$questionId)
|
|
{
|
|
$question_list[]= $questionId;
|
|
}
|
|
$len=count($question_list);
|
|
$orderlist=array_keys($this->questionList);
|
|
|
|
for($i=0;$i<$len;$i++)
|
|
{
|
|
$questionId = $question_list[$i];
|
|
if($questionId == $id)
|
|
{
|
|
$pos1=$orderlist[$i+1];
|
|
$pos2 =$orderlist[$i];
|
|
if(!$pos2)
|
|
{
|
|
//echo 'cant move!';
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
// permutes questions in the array
|
|
$temp=$this->questionList[$pos2];
|
|
$this->questionList[$pos2]=$this->questionList[$pos1];
|
|
$this->questionList[$pos1]=$temp;
|
|
}
|
|
|
|
/**
|
|
* adds a question into the question list
|
|
*
|
|
* @author - Olivier Brouckaert
|
|
* @param - integer $questionId - question ID
|
|
* @return - boolean - true if the question has been added, otherwise false
|
|
*/
|
|
function addToList($questionId)
|
|
{
|
|
// checks if the question ID is not in the list
|
|
if(!$this->isInList($questionId))
|
|
{
|
|
// selects the max position
|
|
if(!$this->selectNbrQuestions())
|
|
{
|
|
$pos=1;
|
|
}
|
|
else
|
|
{
|
|
$pos=max(array_keys($this->questionList))+1;
|
|
}
|
|
|
|
$this->questionList[$pos]=$questionId;
|
|
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* removes a question from the question list
|
|
*
|
|
* @author - Olivier Brouckaert
|
|
* @param - integer $questionId - question ID
|
|
* @return - boolean - true if the question has been removed, otherwise false
|
|
*/
|
|
function removeFromList($questionId)
|
|
{
|
|
// searches the position of the question ID in the list
|
|
$pos=array_search($questionId,$this->questionList);
|
|
|
|
// question not found
|
|
if($pos === false)
|
|
{
|
|
return false;
|
|
}
|
|
else
|
|
{
|
|
// deletes the position from the array containing the wanted question ID
|
|
unset($this->questionList[$pos]);
|
|
|
|
return true;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* deletes the exercise from the database
|
|
* Notice : leaves the question in the data base
|
|
*
|
|
* @author - Olivier Brouckaert
|
|
*/
|
|
function delete(){
|
|
$TBL_EXERCICES = Database::get_course_table(TABLE_QUIZ_TEST);
|
|
$sql="UPDATE $TBL_EXERCICES SET active='-1' WHERE id='".Database::escape_string($this->id)."'";
|
|
api_sql_query($sql);
|
|
}
|
|
|
|
/**
|
|
* Creates the form to create / edit an exercise
|
|
* @param FormValidator $form the formvalidator instance (by reference)
|
|
*/
|
|
function createForm ($form)
|
|
{
|
|
|
|
// title
|
|
$form -> addElement('text', 'exerciseTitle', get_lang('ExerciseName').' : ','class="input_titles"');
|
|
|
|
// fck editor
|
|
global $fck_attribute;
|
|
$fck_attribute = array();
|
|
$fck_attribute['Height'] = '250';
|
|
$fck_attribute['Width'] = '100%';
|
|
$fck_attribute['ToolbarSet'] = 'NewTest';
|
|
|
|
$fck_attribute['Config']['InDocument'] = false;
|
|
$fck_attribute['Config']['CreateDocumentDir'] = '../../courses/'.api_get_course_path().'/document/';
|
|
|
|
//$fck_attribute['Config']['CreateDocumentWebDir'] = api_get_path('WEB_COURSE_PATH').$_course['path'].'/document/';
|
|
|
|
|
|
|
|
$form -> addElement ('html_editor', 'exerciseDescription', get_lang('ExerciseDescription').' : ');
|
|
|
|
// type
|
|
$radios = array();
|
|
$radios[] = FormValidator :: createElement ('radio', 'exerciseType', null, get_lang('SimpleExercise'),'1');
|
|
$radios[] = FormValidator :: createElement ('radio', 'exerciseType', null, get_lang('SequentialExercise'),'2');
|
|
$form -> addGroup($radios, null, get_lang('ExerciseType').' : ', '<br />');
|
|
|
|
$form -> addElement('html','<div class="row">
|
|
<div class="label"> </div>
|
|
<div class="formw">
|
|
<a href="javascript://" onclick="if(document.getElementById(\'options\').style.display == \'none\'){document.getElementById(\'options\').style.display = \'block\';}else{document.getElementById(\'options\').style.display = \'none\';}"><img src="../img/add_na.gif" alt="" />'.get_lang('AdvancedParameters').'</a>
|
|
</div>
|
|
</div>');
|
|
|
|
// Random questions
|
|
$form -> addElement('html','<div id="options" style="display: none;">');
|
|
$random = array();
|
|
|
|
$option=array();
|
|
|
|
$option[0]=get_lang('DoNotRandomize');
|
|
|
|
$count_list=10;
|
|
if ($this->id>0)
|
|
{
|
|
$count_list = $this->selectNbrQuestions();
|
|
}
|
|
for($i=1 ; $i<=$count_list; ++$i)
|
|
{
|
|
$option[$i] = $i; // fill the array with A, B, C.....
|
|
}
|
|
|
|
$attempt_option=array();
|
|
$attempt_option[0]=get_lang('Infinite');
|
|
|
|
for($i=1 ; $i<=10; ++$i)
|
|
{
|
|
$attempt_option[$i] = $i; // fill the array with A, B, C.....
|
|
}
|
|
$random[] = FormValidator :: createElement ('static', 'help','help','<span style="font-style: italic;">'.get_lang('RandomQuestionsHelp').'</span>');
|
|
$random[] = FormValidator :: createElement ('select', 'randomQuestions',null,$option);
|
|
|
|
//$random[] = FormValidator :: createElement ('text', 'randomQuestions', null,null,'0');
|
|
$form -> addGroup($random,null,get_lang('RandomQuestions').' : ','<br />');
|
|
|
|
// Exercise attempts
|
|
//$form -> addElement('text', 'exerciseAttempts', get_lang('ExerciseAttempts').' : ',array('size'=>'2'));
|
|
$form -> addElement('select', 'exerciseAttempts',get_lang('ExerciseAttempts').' : ',$attempt_option);
|
|
|
|
$form -> addElement('html','</div>');
|
|
|
|
// submit
|
|
$form -> addElement('submit', 'submitExercise', get_lang('Ok'));
|
|
|
|
// rules
|
|
$form -> addRule ('exerciseTitle', get_lang('GiveExerciseName'), 'required');
|
|
$form -> addRule ('exerciseAttempts', get_lang('Numeric'), 'numeric');
|
|
|
|
// defaults
|
|
$defaults = array();
|
|
if($this -> id > 0)
|
|
{
|
|
if ($this -> random > $this->selectNbrQuestions())
|
|
{
|
|
$defaults['randomQuestions'] = $this->selectNbrQuestions();
|
|
}
|
|
else
|
|
{
|
|
$defaults['randomQuestions'] = $this -> random;
|
|
}
|
|
|
|
$defaults['exerciseType'] = $this -> selectType();
|
|
$defaults['exerciseTitle'] = $this -> selectTitle();
|
|
$defaults['exerciseDescription'] = $this -> selectDescription();
|
|
$defaults['exerciseAttempts'] = $this->selectAttempts();
|
|
}
|
|
else
|
|
{
|
|
$defaults['exerciseType'] = 1;
|
|
$defaults['exerciseAttempts'] = 0;
|
|
$defaults['randomQuestions'] = 0;
|
|
$defaults['exerciseDescription'] = '';
|
|
}
|
|
$form -> setDefaults($defaults);
|
|
}
|
|
|
|
|
|
/**
|
|
* function which process the creation of exercises
|
|
* @param FormValidator $form the formvalidator instance
|
|
*/
|
|
function processCreation($form)
|
|
{
|
|
$this -> updateAttempts($form -> getSubmitValue('exerciseAttempts'));
|
|
$this -> updateTitle($form -> getSubmitValue('exerciseTitle'));
|
|
$this -> updateDescription($form -> getSubmitValue('exerciseDescription'));
|
|
$this -> updateType($form -> getSubmitValue('exerciseType'));
|
|
$this -> setRandom($form -> getSubmitValue('randomQuestions'));
|
|
$this -> save();
|
|
|
|
}
|
|
}
|
|
|
|
endif;
|
|
?>
|
|
|