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- <?php // $Id: question_pool.php 20451 2009-05-10 12:02:22Z ivantcholakov $
- /*
- ==============================================================================
- Dokeos - elearning and course management software
- Copyright (c) 2004-2009 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
- ==============================================================================
- */
- /**
- * Question Pool
- * This script allows administrators to manage questions and add them into their exercises.
- * One question can be in several exercises
- * @package dokeos.exercise
- * @author Olivier Brouckaert
- * @version $Id: question_pool.php 20451 2009-05-10 12:02:22Z ivantcholakov $
- */
- // name of the language file that needs to be included
- $language_file='exercice';
- include('exercise.class.php');
- include('question.class.php');
- include('answer.class.php');
- include('../inc/global.inc.php');
- $this_section=SECTION_COURSES;
- $is_allowedToEdit=api_is_allowed_to_edit(null,true);
- $TBL_EXERCICE_QUESTION = Database::get_course_table(TABLE_QUIZ_TEST_QUESTION);
- $TBL_EXERCICES = Database::get_course_table(TABLE_QUIZ_TEST);
- $TBL_QUESTIONS = Database::get_course_table(TABLE_QUIZ_QUESTION);
- $TBL_REPONSES = Database::get_course_table(TABLE_QUIZ_ANSWER);
- if ( empty ( $delete ) ) {
- $delete = intval($_GET['delete']);
- }
- if ( empty ( $recup ) ) {
- $recup = intval($_GET['recup']);
- }
- if ( empty ( $fromExercise ) ) {
- $fromExercise = intval($_GET['fromExercise']);
- }
- if(isset($_GET['exerciseId'])){
- $exerciseId = intval($_GET['exerciseId']);
- }
- if(isset($_GET['exerciseLevel'])){
- $exerciseLevel = intval($_GET['exerciseLevel']);
- }
- if(!empty($_GET['page'])){
- $page = intval($_GET['page']);
- }
- //only that type of question
- if(!empty($_GET['type'])){
- $type = intval($_GET['type']);
- }
- // maximum number of questions on a same page
- $limitQuestPage=50;
- // document path
- $documentPath=api_get_path(SYS_COURSE_PATH).$_course['path'].'/document';
- // picture path
- $picturePath=$documentPath.'/images';
- if(!($objExcercise instanceOf Exercise) && !empty($fromExercise))
- {
- $objExercise = new Exercise();
- $objExercise->read($fromExercise);
- }
- if(!($objExcercise instanceOf Exercise) && !empty($exerciseId))
- {
- $objExercise = new Exercise();
- $objExercise->read($exerciseId);
- }
- if($is_allowedToEdit)
- {
- // deletes a question from the data base and all exercises
- if($delete)
- {
- // construction of the Question object
- // if the question exists
- if($objQuestionTmp = Question::read($delete))
- {
- // deletes the question from all exercises
- $objQuestionTmp->delete();
- }
- // destruction of the Question object
- unset($objQuestionTmp);
- }
- // gets an existing question and copies it into a new exercise
- elseif($recup && $fromExercise)
- {
- // if the question exists
- if($objQuestionTmp = Question :: read($recup))
- {
- // adds the exercise ID represented by $fromExercise into the list of exercises for the current question
- $objQuestionTmp->addToList($fromExercise);
- }
- // destruction of the Question object
- unset($objQuestionTmp);
- if(!$objExcercise instanceOf Exercise)
- {
- $objExercise = new Exercise();
- $objExercise->read($fromExercise);
- }
- // adds the question ID represented by $recup into the list of questions for the current exercise
- $objExercise->addToList($recup);
- api_session_register('objExercise');
- header("Location: admin.php?exerciseId=$fromExercise");
- exit();
- }
- }
- if (isset($_SESSION['gradebook'])){
- $gradebook= $_SESSION['gradebook'];
- }
- if (!empty($gradebook) && $gradebook=='view') {
- $interbreadcrumb[]= array (
- 'url' => '../gradebook/'.$_SESSION['gradebook_dest'],
- 'name' => get_lang('Gradebook')
- );
- }
- $nameTools=get_lang('QuestionPool');
- $interbreadcrumb[]=array("url" => "exercice.php","name" => get_lang('Exercices'));
- // if admin of course
- if($is_allowedToEdit)
- {
- Display::display_header($nameTools,"Exercise");
- ?>
- <h3><?php echo $nameTools; ?></h3>
- <div class="actions">
- <?php
- if(!empty($fromExercise)) {
- echo '<a href="admin.php?',api_get_cidreq(),'&exerciseId=',$fromExercise,'">'.Display::return_icon('quiz.gif', get_lang('GoBackToEx')),get_lang('GoBackToEx'),'</a>';
- } else {
- echo '<a href="admin.php?',api_get_cidreq(),'&newQuestion=yes">'.Display::return_icon('new_test.gif'),get_lang('NewQu'),'</a>';
- }
- if (isset($type)) {
- $url = api_get_self().'?type=1';
- } else {
- $url = api_get_self();
- }
- ?>
- <form method="get" action="<?php echo $url; ?>" style="display:inline;">
- <?php
- if (isset($type)) {
- echo '<input type="hidden" name="type" value="1">';
- }
- ?>
- <input type="hidden" name="fromExercise" value="<?php echo $fromExercise; ?>">
- <?php echo get_lang('Filter'); ?> :
- <select name="exerciseId">
- <option value="0">-- <?php echo get_lang('AllExercises'); ?> --</option>
- <option value="-1" <?php if($exerciseId == -1) echo 'selected="selected"'; ?>>-- <?php echo get_lang('OrphanQuestions'); ?> --</option>
- <?php
- $sql="SELECT id,title FROM $TBL_EXERCICES WHERE id<>'".Database::escape_string($fromExercise)."' AND active<>'-1' ORDER BY id";
- $result=Database::query($sql,__FILE__,__LINE__);
- // shows a list-box allowing to filter questions
- while($row=Database::fetch_array($result)) {
- ?>
- <option value="<?php echo $row['id']; ?>" <?php if($exerciseId == $row['id']) echo 'selected="selected"'; ?>><?php echo $row['title']; ?></option>
- <?php
- }
- ?>
- </select>
-
- <?php
- echo get_lang('Difficulty');
- echo ' : <select name="exerciseLevel">';
- //echo '<option value="-1">-- '.get_lang('AllExercises').' --</option>';
- //level difficulty only from 1 to 5
- if (!isset($exerciseLevel)) $exerciseLevel = -1;
- for ($level = -1; $level <=5; $level++) {
- $selected ='';
- if ($level!=0) {
- if ($exerciseLevel == $level)
- $selected = ' selected="selected" ';
- if ($level==-1) {
- echo '<option value="'.$level.'" '.$selected.'>-- '.get_lang('AllExercises').' --</option>';
- } else {
- echo '<option value="'.$level.'" '.$selected.'>'.$level.'</option>';
- }
- }
- }
- echo '</select> ';
- ?>
- <button class="save" type="submit" name="name" value="<?php echo get_lang('Ok') ?>"><?php echo get_lang('Ok') ?></button>
- </form>
- </div>
- <table class="data_table">
- <?php
- $from=$page*$limitQuestPage;
- // if we have selected an exercise in the list-box 'Filter'
- if ($exerciseId > 0) {
- //$sql="SELECT id,question,type FROM $TBL_EXERCICE_QUESTION,$TBL_QUESTIONS WHERE question_id=id AND exercice_id='".Database::escape_string($exerciseId)."' ORDER BY question_order LIMIT $from, ".($limitQuestPage + 1);
- $where = '';
- if (isset($type) && $type==1) {
- $where = ' type = 1 AND ';
- }
- if (isset($exerciseLevel) && $exerciseLevel != -1) {
- $where .= ' level='.$exerciseLevel.' AND ';
- }
- $sql="SELECT id,question,type,level
- FROM $TBL_EXERCICE_QUESTION,$TBL_QUESTIONS
- WHERE $where question_id=id AND exercice_id='".Database::escape_string($exerciseId)."'
- ORDER BY question_order";
- } elseif($exerciseId == -1) {
- // if we have selected the option 'Orphan questions' in the list-box 'Filter'
- // 1. Old logic: When a test is deleted, the correspondent records in 'quiz' and 'quiz_rel_question' tables are deleted.
- //$sql='SELECT id, question, type, exercice_id FROM '.$TBL_QUESTIONS.' as questions LEFT JOIN '.$TBL_EXERCICE_QUESTION.' as quizz_questions ON questions.id=quizz_questions.question_id WHERE exercice_id IS NULL LIMIT $from, '.($limitQuestPage + 1);
- // 2. New logic: When a test is deleted, the field 'active' takes value -1 (it is in the correspondent record in 'quiz' table).
- //$sql='SELECT questions.id, questions.question, questions.type, quizz_questions.exercice_id FROM '.$TBL_QUESTIONS.
- // ' as questions LEFT JOIN '.$TBL_EXERCICE_QUESTION.' as quizz_questions ON questions.id=quizz_questions.question_id LEFT JOIN '.$TBL_EXERCICES.
- // ' as exercices ON exercice_id=exercices.id WHERE exercices.active = -1 LIMIT $from, '.($limitQuestPage + 1);
- // 3. This is more safe to changes, it is a mix between old and new logic.
- /*$sql='SELECT questions.id, questions.question, questions.type, quizz_questions.exercice_id FROM '.$TBL_QUESTIONS.
- ' as questions LEFT JOIN '.$TBL_EXERCICE_QUESTION.' as quizz_questions ON questions.id=quizz_questions.question_id LEFT JOIN '.$TBL_EXERCICES.
- ' as exercices ON exercice_id=exercices.id WHERE quizz_questions.exercice_id IS NULL OR exercices.active = -1 LIMIT '.$from.', '.($limitQuestPage + 1);
- */
- /* 4. Query changed because of the Level feature implemented
- $sql='SELECT id, question, type, exercice_id,level FROM '.$TBL_QUESTIONS.' as questions LEFT JOIN '.$TBL_EXERCICE_QUESTION.' as quizz_questions
- ON questions.id=quizz_questions.question_id AND exercice_id IS NULL '.
- (!is_null($exerciseLevel) && $exerciseLevel >= 0 ? 'WHERE level=\''.$exerciseLevel.'\' ' : '');
- */
- // 5. this is the combination of the 3 and 4 query because of the level feature implementation
- // we filter the type of question, because in the DirectFeedback we can only add questions with type=1 = UNIQUE_ANSWER
- $type_where= '';
- if (isset($type) && $type==1) {
- $type_where = ' AND questions.type = 1 ';
- }
- $level_where = '';
- if (isset($exerciseLevel) && $exerciseLevel!= -1 ) {
- $level_where = ' level='.$exerciseLevel.' AND ';
- }
- $sql='SELECT questions.id, questions.question, questions.type, quizz_questions.exercice_id , level
- FROM '.$TBL_QUESTIONS.' as questions LEFT JOIN '.$TBL_EXERCICE_QUESTION.' as quizz_questions
- ON questions.id=quizz_questions.question_id LEFT JOIN '.$TBL_EXERCICES.' as exercices
- ON exercice_id=exercices.id
- WHERE '.$level_where.' (quizz_questions.exercice_id IS NULL OR exercices.active = -1 ) '.$type_where.'
- LIMIT '.$from.', '.($limitQuestPage + 1);
- } else {
- // if we have not selected any option in the list-box 'Filter'
- //$sql="SELECT id,question,type FROM $TBL_QUESTIONS LIMIT $from, ".($limitQuestPage + 1);
- $where = '';
- if (isset($type)&& $type==1){
- $where = ' WHERE type = 1 ';
- }
- if (isset($exerciseLevel) && $exerciseLevel != -1) {
- if (strlen($where)>0)
- $where .= ' AND level='.$exerciseLevel.' ';
- else
- $where = ' WHERE level='.$exerciseLevel.' ';
- }
- $sql="SELECT id,question,type,level FROM $TBL_QUESTIONS $where ";
- // forces the value to 0
- //echo $sql;
- $exerciseId=0;
- }
- $result=Database::query($sql,__FILE__,__LINE__);
- $nbrQuestions=Database::num_rows($result);
- echo '<tr>',
- '<td colspan="',($fromExercise?3:3),'">',
- '<table border="0" cellpadding="0" cellspacing="0" width="100%">',
- '<tr>',
- '<td>';
- echo '</td>',
- '<td align="right">';
- if(!empty($page)) {
- echo '<a href="',api_get_self(),'?',api_get_cidreq(),'&exerciseId=',$exerciseId,'&fromExercise=',$fromExercise,'&page=',($page-1),'"><< ',get_lang('PreviousPage'),'</a> |';
- } elseif($nbrQuestions > $limitQuestPage) {
- echo '<< ',get_lang('PreviousPage'),' |';
- }
- if($nbrQuestions > $limitQuestPage) {
- echo '<a href="',api_get_self(),'?',api_get_cidreq(),'&exerciseId=',$exerciseId,'&fromExercise=',$fromExercise,'&page=',($page+1),'">',get_lang('NextPage'),' >></a>';
- } elseif($page) {
- echo ' ',get_lang('NextPage'),' >>';
- }
- echo '</td>
- </tr>
- </table>
- </td>
- </tr>
- <tr bgcolor="#e6e6e6">';
- if(!empty($fromExercise)) {
- echo '<th>',get_lang('Question'),'</th>',
- '<th>',get_lang('Level'),'</th>',
- '<th>',get_lang('Reuse'),'</th>';
- } else {
- echo '<td width="60%" align="center">',get_lang('Question'),'</td>',
- '<td width="20%" align="center">',get_lang('Modify'),'</td>',
- '<td width="20%" align="center">',get_lang('Delete'),'</td>';
- }
- echo '</tr>';
- $i=1;
- echo '<pre>';
- echo '</pre>';
- while ($row = Database::fetch_array($result)) {
- // if we come from the exercise administration to get a question,
- // don't show the questions already used by that exercise
- /*if (!$fromExercise) {echo '1'; }
- if (!isset($objExercise)){echo '2';}
- if (!($objExercise instanceOf Exercise)){echo '3';}
- if (!$objExercise->isInList($row['id'])) {echo '4';}
- */
- // original recipe -
- //if (!$fromExercise || !isset($objExercise) || !($objExercise instanceOf Exercise) || (!$objExercise->isInList($row['id'])))
- if (!$fromExercise || !isset($objExercise) || !($objExercise instanceOf Exercise) || (is_array($objExercise->questionList)) ) {
- echo '<tr ',($i%2==0?'class="row_odd"':'class="row_even"'),'>';
- echo ' <td><a href="admin.php?',api_get_cidreq(),'&editQuestion=',$row['id'],'&fromExercise=',$fromExercise,'">',$row['question'],'</a></td>';
- echo ' <td align="center" >';
- if (empty($fromExercise)) {
- echo '<a href="admin.php?'.api_get_cidreq().'&editQuestion=',$row['id'],'"><img src="../img/edit.gif" border="0" alt="',get_lang('Modify'),'"></a>',
- '</td>',
- '<td align="center">',
- '<a href="',api_get_self(),'?',api_get_cidreq(),'&exerciseId=',$exerciseId,'&delete=',$row['id'],'" onclick="javascript:if(!confirm(\'',addslashes(api_htmlentities(get_lang('ConfirmYourChoice'),ENT_QUOTES,$charset)),'\')) return false;"><img src="../img/delete.gif" border="0" alt="',get_lang('Delete'),'"></a>';
- //'<a href="',api_get_self(),'?',api_get_cidreq(),'&exerciseId=',$exerciseId,'&delete=',$row['id'],'" onclick="javascript:if(!confirm(\'',addslashes(api_htmlentities(get_lang('ConfirmYourChoice'),ENT_QUOTES,$charset)),'\')) return false;"><img src="../img/delete.gif" border="0" alt="',get_lang('Delete'),'"></a>';
- } else {
- //echo $row['level'],'</td>',
- // '<td><a href="',api_get_self(),'?',api_get_cidreq(),'&recup=',$row['id'],'&fromExercise=',$fromExercise,'"><img src="../img/view_more_stats.gif" border="0" alt="',get_lang('Reuse'),'"></a>';
- echo $row['level'],'</td>',
- '<td align="center" ><a href="',api_get_self(),'?',api_get_cidreq(),'&recup=',$row['id'],'&fromExercise=',$fromExercise,'">' .
- '<img src="../img/view_more_stats.gif" border="0" alt="',get_lang('Reuse'),'"></a>';
- }
- echo '</td>';
- echo '</tr>';
- // skips the last question, that is only used to know if we have or not to create a link "Next page"
- if($i == $limitQuestPage) {
- break;
- }
- $i++;
- }
- }
- if (!$nbrQuestions) {
- echo '<tr>',
- '<td colspan="',($fromExercise?3:3),'">',get_lang('NoQuestion'),'</td>',
- '</tr>';
- }
- echo '</table>';
- Display::display_footer();
- } else {
- // if not admin of course
- api_not_allowed(true);
- }
- ?>
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