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521 lines
14 KiB
521 lines
14 KiB
<?php
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/*
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DOKEOS - elearning and course management software
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For a full list of contributors, see documentation/credits.html
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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 "documentation/licence.html" more details.
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Contact:
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Dokeos
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Rue des Palais 44 Paleizenstraat
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B-1030 Brussels - Belgium
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Tel. +32 (2) 211 34 56
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*/
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/**
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* This class allows to instantiate an object of type Answer
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* 5 arrays are created to receive the attributes of each answer belonging to a specified question
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* @package dokeos.exercise
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* @author Olivier Brouckaert
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* @version $Id: answer.class.php 21172 2009-06-01 20:58:05Z darkvela $
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*/
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if(!class_exists('Answer')):
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class Answer
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{
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var $questionId;
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// these are arrays
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var $answer;
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var $correct;
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var $comment;
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var $weighting;
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var $position;
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var $hotspot_coordinates;
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var $hotspot_type;
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var $destination;
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// these arrays are used to save temporarily new answers
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// then they are moved into the arrays above or deleted in the event of cancellation
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var $new_answer;
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var $new_correct;
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var $new_comment;
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var $new_weighting;
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var $new_position;
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var $new_hotspot_coordinates;
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var $new_hotspot_type;
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var $nbrAnswers;
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var $new_nbrAnswers;
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var $new_destination; // id of the next question if feedback option is set to Directfeedback
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/**
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* constructor of the class
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*
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* @author Olivier Brouckaert
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* @param integer Question ID that answers belong to
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*/
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function Answer($questionId)
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{
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//$this->questionType=$questionType;
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$this->questionId=(int)$questionId;
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$this->answer=array();
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$this->correct=array();
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$this->comment=array();
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$this->weighting=array();
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$this->position=array();
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$this->hotspot_coordinates=array();
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$this->hotspot_type=array();
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$this->destination= array();
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// clears $new_* arrays
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$this->cancel();
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// fills arrays
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$this->read();
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}
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/**
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* clears $new_* arrays
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*
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* @author - Olivier Brouckaert
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*/
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function cancel()
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{
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$this->new_answer=array();
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$this->new_correct=array();
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$this->new_comment=array();
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$this->new_weighting=array();
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$this->new_position=array();
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$this->new_hotspot_coordinates=array();
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$this->new_hotspot_type=array();
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$this->new_nbrAnswers=0;
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$this->new_destination=array();
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}
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/**
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* reads answer informations from the data base
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*
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* @author - Olivier Brouckaert
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*/
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function read()
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{
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global $_course;
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$TBL_ANSWER = Database::get_course_table(TABLE_QUIZ_ANSWER);
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$questionId=$this->questionId;
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//$answerType=$this->selectType();
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$sql="SELECT id,answer,correct,comment,ponderation, position, hotspot_coordinates, hotspot_type, destination FROM
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$TBL_ANSWER WHERE question_id ='".Database::escape_string($questionId)."' ORDER BY position";
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$result=api_sql_query($sql,__FILE__,__LINE__);
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$i=1;
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// while a record is found
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while($object=mysql_fetch_object($result))
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{
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$this->id[$i]=$object->id;
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$this->answer[$i]=$object->answer;
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$this->correct[$i]=$object->correct;
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$this->comment[$i]=$object->comment;
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$this->weighting[$i]=$object->ponderation;
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$this->position[$i]=$object->position;
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$this->hotspot_coordinates[$i]=$object->hotspot_coordinates;
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$this->hotspot_type[$i]=$object->hotspot_type;
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$this->destination[$i]=$object->destination;
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$i++;
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}
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$this->nbrAnswers=$i-1;
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}
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/**
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* reads answer informations from the data base ordered by parameter
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* @param string Field we want to order by
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* @param string DESC or ASC
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* @author Frederic Vauthier
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*/
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function readOrderedBy($field,$order=ASC)
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{
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global $_course;
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$field = Database::escape_string($field);
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if(empty($field))
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{
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$field = 'position';
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}
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if($order != 'ASC' and $order!='DESC')
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{
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$order = 'ASC';
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}
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$TBL_ANSWER = Database::get_course_table(TABLE_QUIZ_ANSWER);
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$questionId=$this->questionId;
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//$answerType=$this->selectType();
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$sql="SELECT answer,correct,comment,ponderation,position, hotspot_coordinates, hotspot_type,destination " .
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"FROM $TBL_ANSWER WHERE question_id='".Database::escape_string($questionId)."' " .
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"ORDER BY $field $order";
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$result=api_sql_query($sql,__FILE__,__LINE__);
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$i=1;
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// while a record is found
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while($object=mysql_fetch_object($result))
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{
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$this->answer[$i]=$object->answer;
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$this->correct[$i]=$object->correct;
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$this->comment[$i]=$object->comment;
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$this->weighting[$i]=$object->ponderation;
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$this->position[$i]=$object->position;
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$this->destination[$i]=$object->destination;
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$i++;
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}
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$this->nbrAnswers=$i-1;
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}
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/**
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* returns the number of answers in this question
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*
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* @author - Olivier Brouckaert
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* @return - integer - number of answers
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*/
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function selectNbrAnswers()
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{
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return $this->nbrAnswers;
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}
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/**
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* returns the question ID which the answers belong to
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*
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* @author - Olivier Brouckaert
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* @return - integer - the question ID
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*/
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function selectQuestionId()
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{
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return $this->questionId;
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}
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/**
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* returns the question ID of the destination question
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*
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* @author - Julio Montoya
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* @return - integer - the question ID
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*/
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function selectDestination($id)
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{
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return $this->destination[$id];
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}
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/**
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* returns the answer title
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*
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* @author - Olivier Brouckaert
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* @param - integer $id - answer ID
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* @return - string - answer title
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*/
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function selectAnswer($id)
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{
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return $this->answer[$id];
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}
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/**
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* returns the answer title from an answer's position
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*
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* @author - Yannick Warnier
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* @param - integer $id - answer ID
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* @return - string - answer title
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*/
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function selectAnswerIdByPosition($pos)
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{
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foreach ($this->position as $k => $v) {
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if ($v != $pos) { continue; }
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return $k;
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}
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return false;
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}
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/**
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* Returns a list of answers
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* @author Yannick Warnier <ywarnier@beeznest.org>
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* @return array List of answers where each answer is an array of (id, answer, comment, grade) and grade=weighting
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*/
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function getAnswersList()
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{
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$list = array();
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for($i = 1; $i<=$this->nbrAnswers;$i++){
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if(!empty($this->answer[$i])){
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$list[] = array(
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'id'=>$i,
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'answer'=>$this->answer[$i],
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'comment'=>$this->comment[$i],
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'grade' => $this->weighting[$i],
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'hotspot_coord' => $this->hotspot_coordinates[$i],
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'hotspot_type' => $this->hotspot_type[$i],
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'correct' => $this->correct[$i],
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'destination' => $this->destination[$i]
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);
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}
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}
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return $list;
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}
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/**
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* Returns a list of grades
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* @author Yannick Warnier <ywarnier@beeznest.org>
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* @return array List of grades where grade=weighting (?)
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*/
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function getGradesList()
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{
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$list = array();
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for($i = 0; $i<$this->nbrAnswers;$i++){
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if(!empty($this->answer[$i])){
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$list[$i] = $this->weighting[$i];
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}
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}
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return $list;
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}
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/**
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* Returns the question type
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* @author Yannick Warnier <ywarnier@beeznest.org>
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* @return integer The type of the question this answer is bound to
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*/
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function getQuestionType()
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{
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$TBL_QUESTIONS = Database::get_course_table(TABLE_QUIZ_QUESTION);
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$sql = "SELECT * FROM $TBL_QUESTIONS WHERE id = '".Database::escape_string($this->questionId)."'";
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$res = api_sql_query($sql,__FILE__,__LINE__);
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if(Database::num_rows($res)<=0){
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return null;
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}
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$row = Database::fetch_array($res);
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return $row['type'];
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}
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/**
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* tells if answer is correct or not
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*
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* @author - Olivier Brouckaert
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* @param - integer $id - answer ID
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* @return - integer - 0 if bad answer, not 0 if good answer
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*/
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function isCorrect($id)
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{
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return $this->correct[$id];
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}
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/**
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* returns answer comment
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*
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* @author - Olivier Brouckaert
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* @param - integer $id - answer ID
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* @return - string - answer comment
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*/
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function selectComment($id)
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{
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return $this->comment[$id];
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}
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/**
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* returns answer weighting
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*
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* @author - Olivier Brouckaert
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* @param - integer $id - answer ID
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* @return - integer - answer weighting
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*/
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function selectWeighting($id)
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{
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return $this->weighting[$id];
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}
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/**
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* returns answer position
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*
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* @author - Olivier Brouckaert
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* @param - integer $id - answer ID
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* @return - integer - answer position
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*/
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function selectPosition($id)
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{
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return $this->position[$id];
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}
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/**
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* returns answer hotspot coordinates
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*
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* @author Olivier Brouckaert
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* @param integer Answer ID
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* @return integer Answer position
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*/
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function selectHotspotCoordinates($id)
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{
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return $this->hotspot_coordinates[$id];
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}
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/**
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* returns answer hotspot type
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*
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* @author Toon Keppens
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* @param integer Answer ID
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* @return integer Answer position
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*/
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function selectHotspotType($id)
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{
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return $this->hotspot_type[$id];
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}
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/**
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* creates a new answer
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*
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* @author Olivier Brouckaert
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* @param string answer title
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* @param integer 0 if bad answer, not 0 if good answer
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* @param string answer comment
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* @param integer answer weighting
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* @param integer answer position
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* @param coordinates Coordinates for hotspot exercises (optional)
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* @param integer Type for hotspot exercises (optional)
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*/
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function createAnswer($answer,$correct,$comment,$weighting,$position,$new_hotspot_coordinates = NULL, $new_hotspot_type = NULL,$destination='')
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{
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$this->new_nbrAnswers++;
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$id=$this->new_nbrAnswers;
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$this->new_answer[$id]=$answer;
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$this->new_correct[$id]=$correct;
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$this->new_comment[$id]=$comment;
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$this->new_weighting[$id]=$weighting;
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$this->new_position[$id]=$position;
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$this->new_hotspot_coordinates[$id]=$new_hotspot_coordinates;
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$this->new_hotspot_type[$id]=$new_hotspot_type;
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$this->new_destination[$id]=$destination;
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}
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/**
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* updates an answer
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*
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* @author Toon Keppens
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* @param string Answer title
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* @param string Answer comment
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* @param integer Answer weighting
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* @param integer Answer position
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*/
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function updateAnswers($answer,$comment,$weighting,$position,$destination)
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{
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global $TBL_REPONSES;
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$questionId=$this->questionId;
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$sql = "UPDATE $TBL_REPONSES SET " .
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"answer = '".Database::escape_string($answer)."', " .
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"comment = '".Database::escape_string($comment)."', " .
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"ponderation = '".Database::escape_string($weighting)."', " .
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"position = '".Database::escape_string($position)."', " .
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"destination = '".Database::escape_string($destination)."' " .
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"WHERE id = '".Database::escape_string($position)."' " .
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"AND question_i` = '".Database::escape_string($questionId)."'";
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api_sql_query($sql,__FILE__,__LINE__);
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}
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/**
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* records answers into 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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global $TBL_REPONSES;
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$questionId=$this->questionId;
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// removes old answers before inserting of new ones
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$sql="DELETE FROM $TBL_REPONSES WHERE question_id='".Database::escape_string($questionId)."'";
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api_sql_query($sql,__FILE__,__LINE__);
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// inserts new answers into data base
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$sql="INSERT INTO $TBL_REPONSES" .
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"(id,question_id,answer,correct,comment," .
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"ponderation,position,hotspot_coordinates,hotspot_type,destination) VALUES";
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for($i=1;$i <= $this->new_nbrAnswers;$i++)
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{
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$answer = Database::escape_string($this->new_answer[$i]);
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$correct = Database::escape_string($this->new_correct[$i]);
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$comment = Database::escape_string($this->new_comment[$i]);
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$weighting = Database::escape_string($this->new_weighting[$i]);
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$position = Database::escape_string($this->new_position[$i]);
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$hotspot_coordinates = Database::escape_string($this->new_hotspot_coordinates[$i]);
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$hotspot_type = Database::escape_string($this->new_hotspot_type[$i]);
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$destination = Database::escape_string($this->new_destination[$i]);
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$sql.="('$i','$questionId','$answer','$correct','$comment',
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'$weighting','$position','$hotspot_coordinates','$hotspot_type','$destination'),";
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}
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$sql = api_substr($sql,0,-1);
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api_sql_query($sql,__FILE__,__LINE__);
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// moves $new_* arrays
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$this->answer=$this->new_answer;
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$this->correct=$this->new_correct;
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$this->comment=$this->new_comment;
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$this->weighting=$this->new_weighting;
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$this->position=$this->new_position;
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$this->hotspot_coordinates=$this->new_hotspot_coordinates;
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$this->hotspot_type=$this->new_hotspot_type;
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$this->nbrAnswers=$this->new_nbrAnswers;
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$this->destination=$this->new_destination;
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// clears $new_* arrays
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$this->cancel();
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}
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/**
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* duplicates answers by copying them into another question
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*
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* @author - Olivier Brouckaert
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* @param - integer $newQuestionId - ID of the new question
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*/
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function duplicate($newQuestionId)
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{
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global $TBL_REPONSES;
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// if at least one answer
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if($this->nbrAnswers)
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{
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// inserts new answers into data base
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$sql="INSERT INTO $TBL_REPONSES" .
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"(id,question_id,answer,correct,comment," .
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"ponderation,position,hotspot_coordinates,hotspot_type,destination) VALUES";
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for($i=1;$i <= $this->nbrAnswers;$i++)
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{
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$answer = Database::escape_string($this->answer[$i]);
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$correct = Database::escape_string($this->correct[$i]);
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$comment = Database::escape_string($this->comment[$i]);
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$weighting = Database::escape_string($this->weighting[$i]);
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$position = Database::escape_string($this->position[$i]);
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$hotspot_coordinates = Database::escape_string($this->hotspot_coordinates[$i]);
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$hotspot_type = Database::escape_string($this->hotspot_type[$i]);
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$destination = Database::escape_string($this->destination[$i]);
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$sql.="('$i','$newQuestionId','$answer','$correct','$comment'," .
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"'$weighting','$position','$hotspot_coordinates','$hotspot_type','$destination'),";
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}
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$sql=api_substr($sql,0,-1);
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api_sql_query($sql,__FILE__,__LINE__);
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}
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}
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}
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endif;
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?>
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