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- <?php
- /* For licensing terms, see /license.txt */
- /**
- * File containing the UNIQUE_ANSWER class.
- * @package chamilo.exercise
- * @author Eric Marguin
- */
- /**
- * Code
- */
- if(!class_exists('UniqueAnswer')):
- /**
- CLASS UNIQUE_ANSWER
- *
- * This class allows to instantiate an object of type UNIQUE_ANSWER (MULTIPLE CHOICE, UNIQUE ANSWER),
- * extending the class question
- *
- * @author Eric Marguin
- * @author Julio Montoya
- * @package chamilo.exercise
- **/
- class UniqueAnswer extends Question {
- static $typePicture = 'mcua.gif';
- static $explanationLangVar = 'UniqueSelect';
- /**
- * Constructor
- */
- function UniqueAnswer() {
- //this is highly important
- parent::question();
- $this -> type = UNIQUE_ANSWER;
- $this -> isContent = $this-> getIsContent();
- }
- /**
- * function which redifines Question::createAnswersForm
- * @param the formvalidator instance
- * @param the answers number to display
- */
- function createAnswersForm ($form) {
- // Getting the exercise list
- $obj_ex = $_SESSION['objExercise'];
- $editor_config = array('ToolbarSet' => 'TestProposedAnswer', 'Width' => '100%', 'Height' => '125');
- //this line define how many question by default appear when creating a choice question
- $nb_answers = isset($_POST['nb_answers']) ? (int) $_POST['nb_answers'] : 4; // The previous default value was 2. See task #1759.
- $nb_answers += (isset($_POST['lessAnswers']) ? -1 : (isset($_POST['moreAnswers']) ? 1 : 0));
- /*
- Types of Feedback
- $feedback_option[0]=get_lang('Feedback');
- $feedback_option[1]=get_lang('DirectFeedback');
- $feedback_option[2]=get_lang('NoFeedback');
- */
- $feedback_title='';
- $comment_title='';
- if ($obj_ex->selectFeedbackType() == EXERCISE_FEEDBACK_TYPE_END) {
- $comment_title = '<th>'.get_lang('Comment').'</th>';
- } elseif ($obj_ex->selectFeedbackType() == EXERCISE_FEEDBACK_TYPE_DIRECT) {
- //Scenario
- $editor_config['Width'] = '250';
- $editor_config['Height'] = '110';
- $comment_title = '<th width="500px" >'.get_lang('Comment').'</th>';
- $feedback_title = '<th width="350px" >'.get_lang('Scenario').'</th>';
- }
- $html='<table class="data_table">
- <tr style="text-align: center;">
- <th width="10px">
- '.get_lang('Number').'
- </th>
- <th width="10px" >
- '.get_lang('True').'
- </th>
- <th width="50%">
- '.get_lang('Answer').'
- </th>
- '.$comment_title.'
- '.$feedback_title.'
- <th width="50px">
- '.get_lang('Weighting').'
- </th>
- </tr>';
- $form -> addElement ('label', get_lang('Answers').'<br /> <img src="../img/fill_field.png">', $html);
- $defaults = array();
- $correct = 0;
- if(!empty($this -> id)) {
- $answer = new Answer($this -> id);
- $answer -> read();
- if(count($answer->nbrAnswers)>0 && !$form->isSubmitted()) {
- $nb_answers = $answer->nbrAnswers;
- }
- }
- $form -> addElement('hidden', 'nb_answers');
- //Feedback SELECT
- $question_list = $obj_ex->selectQuestionList();
- $select_question=array();
- $select_question[0] = get_lang('SelectTargetQuestion');
- require_once '../newscorm/learnpathList.class.php';
- if (is_array($question_list)) {
- foreach ($question_list as $key=>$questionid) {
- //To avoid warning messages
- if (!is_numeric($questionid)) {
- continue;
- }
- $question = Question::read($questionid);
- if($question) {
- $select_question[$questionid]='Q'.$key.' :'.Text::cut($question->selectTitle(),20);
- }
- }
- }
- $select_question[-1] = get_lang('ExitTest');
- $list = new LearnpathList(api_get_user_id());
- $flat_list = $list->get_flat_list();
- $select_lp_id=array();
- $select_lp_id[0]=get_lang('SelectTargetLP');
- foreach ($flat_list as $id => $details) {
- $select_lp_id[$id] = Text::cut($details['lp_name'],20);
- }
- $temp_scenario = array();
- if ($nb_answers < 1) {
- $nb_answers = 1;
- Display::display_normal_message(get_lang('YouHaveToCreateAtLeastOneAnswer'));
- }
- for ($i = 1 ; $i <= $nb_answers ; ++$i) {
- $form -> addElement ('html', '<tr>');
- if (isset($answer) && is_object($answer)) {
- if ($answer -> correct[$i]) {
- $correct = $i;
- }
- $defaults['answer['.$i.']'] = $answer->answer[$i];
- $defaults['comment['.$i.']'] = $answer->comment[$i];
- $defaults['weighting['.$i.']'] = Text::float_format($answer->weighting[$i], 1);
- $item_list=explode('@@',$answer -> destination[$i]);
- $try = $item_list[0];
- $lp = $item_list[1];
- $list_dest = $item_list[2];
- $url = $item_list[3];
- if ($try==0) {
- $try_result = 0;
- } else {
- $try_result = 1;
- }
- if ($url==0) {
- $url_result='';
- } else {
- $url_result = $url;
- }
- $temp_scenario['url'.$i] = $url_result;
- $temp_scenario['try'.$i] = $try_result;
- $temp_scenario['lp'.$i] = $lp;
- $temp_scenario['destination'.$i]= $list_dest;
- } else {
- $defaults['answer[1]'] = get_lang('DefaultUniqueAnswer1');
- $defaults['weighting[1]'] = 10;
- $defaults['answer[2]'] = get_lang('DefaultUniqueAnswer2');
- $defaults['weighting[2]'] = 0;
- $temp_scenario['destination'.$i] = array('0');
- $temp_scenario['lp'.$i] = array('0');
- }
- $defaults['scenario'] = $temp_scenario;
- $renderer = $form->defaultRenderer();
- $renderer->setElementTemplate('<td><!-- BEGIN error --><span class="form_error">{error}</span><!-- END error --><br/>{element}</td>', 'correct');
- $renderer->setElementTemplate('<td><!-- BEGIN error --><span class="form_error">{error}</span><!-- END error --><br/>{element}</td>', 'counter['.$i.']');
- $renderer->setElementTemplate('<td><!-- BEGIN error --><span class="form_error">{error}</span><!-- END error --><br/>{element}</td>', 'answer['.$i.']');
- $renderer->setElementTemplate('<td><!-- BEGIN error --><span class="form_error">{error}</span><!-- END error --><br/>{element}</td>', 'comment['.$i.']');
- $renderer->setElementTemplate('<td><!-- BEGIN error --><span class="form_error">{error}</span><!-- END error --><br/>{element}</td>', 'weighting['.$i.']');
- $answer_number = $form->addElement('text', 'counter['.$i.']',null,' value = "'.$i.'"');
- $answer_number->freeze();
- $form->addElement('radio', 'correct', null, null, $i, 'class="checkbox" style="margin-left: 0em;"');
- $form->addElement('html_editor', 'answer['.$i.']', null, 'style="vertical-align:middle"', $editor_config);
- $form->addRule('answer['.$i.']', get_lang('ThisFieldIsRequired'), 'required');
- if ($obj_ex->selectFeedbackType() == EXERCISE_FEEDBACK_TYPE_END) {
- // feedback
- $form->addElement('html_editor', 'comment['.$i.']', null, 'style="vertical-align:middle"', $editor_config);
- } elseif ($obj_ex->selectFeedbackType() == EXERCISE_FEEDBACK_TYPE_DIRECT) {
- $form->addElement('html_editor', 'comment['.$i.']', null, 'style="vertical-align:middle"', $editor_config);
- // Direct feedback
- //Adding extra feedback fields
- $group = array();
- $group['try'.$i] = $form->createElement('checkbox', 'try'.$i, null , get_lang('TryAgain'));
- $group['lp'.$i] = $form->createElement('select', 'lp'.$i, get_lang('SeeTheory').': ', $select_lp_id);
- $group['destination'.$i]= $form->createElement('select', 'destination'.$i, get_lang('GoToQuestion').': ' , $select_question);
- $group['url'.$i] = $form->createElement('text', 'url'.$i, get_lang('Other').': ', array('class'=>'span2', 'placeholder' => get_lang('Other')));
- $form->addGroup($group, 'scenario');
- $renderer->setElementTemplate('<td><!-- BEGIN error --><span class="form_error">{error}</span><!-- END error --><br/>{element}', 'scenario');
- }
- $form->addElement('text', 'weighting['.$i.']', null, array('class' => "span1", 'value' => '0'));
- $form->addElement ('html', '</tr>');
- }
- $form -> addElement ('html', '</table>');
- $form -> addElement ('html', '<br />');
- $navigator_info = api_get_navigator();
- global $text, $class;
- //ie6 fix
- if ($obj_ex->edit_exercise_in_lp == true) {
- if ($navigator_info['name']=='Internet Explorer' && $navigator_info['version']=='6') {
- $form->addElement('submit', 'lessAnswers', get_lang('LessAnswer'),'class="btn minus"');
- $form->addElement('submit', 'moreAnswers', get_lang('PlusAnswer'),'class="btn plus"');
- $form->addElement('submit','submitQuestion',$text, 'class="'.$class.'"');
- } else {
- //setting the save button here and not in the question class.php
- $form->addElement('style_submit_button', 'lessAnswers', get_lang('LessAnswer'),'class="btn minus"');
- $form->addElement('style_submit_button', 'moreAnswers', get_lang('PlusAnswer'),'class="btn plus"');
- $form->addElement('style_submit_button', 'submitQuestion',$text, 'class="'.$class.'"');
- }
- }
- $renderer->setElementTemplate('{element} ','submitQuestion');
- $renderer->setElementTemplate('{element} ','lessAnswers');
- $renderer->setElementTemplate('{element} ','moreAnswers');
- $form->addElement('html', '</div></div>');
- //We check the first radio button to be sure a radio button will be check
- if ($correct==0) {
- $correct=1;
- }
- $defaults['correct'] = $correct;
- if (!empty($this -> id)) {
- $form -> setDefaults($defaults);
- } else {
- if ($this -> isContent == 1) {
- $form -> setDefaults($defaults);
- }
- }
- $form->setConstants(array('nb_answers' => $nb_answers));
- }
- /**
- * abstract function which creates the form to create / edit the answers of the question
- * @param the formvalidator instance
- * @param the answers number to display
- */
- function processAnswersCreation($form) {
- $questionWeighting = $nbrGoodAnswers = 0;
- $correct = $form -> getSubmitValue('correct');
- $objAnswer = new Answer($this->id);
- $nb_answers = $form->getSubmitValue('nb_answers');
- for ($i=1 ; $i <= $nb_answers ; $i++) {
- $answer = trim($form -> getSubmitValue('answer['.$i.']'));
- $comment = trim($form -> getSubmitValue('comment['.$i.']'));
- $weighting = trim($form -> getSubmitValue('weighting['.$i.']'));
- $scenario = $form -> getSubmitValue('scenario');
- //$list_destination = $form -> getSubmitValue('destination'.$i);
- //$destination_str = $form -> getSubmitValue('destination'.$i);
- $try = $scenario['try'.$i];
- $lp = $scenario['lp'.$i];
- $destination = $scenario['destination'.$i];
- $url = trim($scenario['url'.$i]);
- /*
- How we are going to parse the destination value
- here we parse the destination value which is a string
- 1@@3@@2;4;4;@@http://www.chamilo.org
- where: try_again@@lp_id@@selected_questions@@url
- try_again = is 1 || 0
- lp_id = id of a learning path (0 if dont select)
- selected_questions= ids of questions
- url= an url
- $destination_str='';
- foreach ($list_destination as $destination_id)
- {
- $destination_str.=$destination_id.';';
- }*/
- $goodAnswer = ($correct == $i) ? true : false;
- if ($goodAnswer) {
- $nbrGoodAnswers++;
- $weighting = abs($weighting);
- if($weighting > 0) {
- $questionWeighting += $weighting;
- }
- }
- if (empty($try)) {
- $try = 0;
- }
- if (empty($lp)) {
- $lp = 0;
- }
- if (empty($destination)) {
- $destination=0;
- }
- if ($url=='') {
- $url=0;
- }
- //1@@1;2;@@2;4;4;@@http://www.chamilo.org
- $dest = $try.'@@'.$lp.'@@'.$destination.'@@'.$url;
- $objAnswer->createAnswer($answer, $goodAnswer, $comment, $weighting, $i, null, null, $dest);
- }
- // saves the answers into the data base
- $objAnswer->save();
- // sets the total weighting of the question
- $this->updateWeighting($questionWeighting);
- $this->save();
- }
- function return_header($feedback_type = null, $counter = null, $score = null, $show_media = false) {
- $header = parent::return_header($feedback_type, $counter, $score, $show_media);
- $header .= '<table class="'.$this->question_table_class .'">
- <tr>
- <th>'.get_lang("Choice").'</th>
- <th>'. get_lang("ExpectedChoice").'</th>
- <th>'. get_lang("Answer").'</th>';
- if ($feedback_type != EXERCISE_FEEDBACK_TYPE_EXAM) {
- $header .= '<th>'.get_lang("Comment").'</th>';
- } else {
- $header .= '<th> </th>';
- }
- $header .= '</tr>';
- return $header;
- }
- /**
- * Create database record for the given answer
- * @param int The answer ID (technically 1 is OK if you don't know)
- * @param int The question this answer is attached to
- * @param string The answer itself
- * @param string The answer comment (shown as feedback if enabled)
- * @param float Score given by this answer if selected (can be negative)
- * @param int Whether this answer is considered correct (1) or not (0)
- * @param int The course ID - if not provided, will be guessed from the context
- * @return void
- * @assert (1,null,'a','',1,1,null) === false
- * @assert (1,1,'','',1,1,null) === false
- */
- function create_answer($id=1, $question_id, $answer_title, $comment = '', $score = 0, $correct = 0, $course_id = null) {
- if (empty($question_id) or empty($answer_title)) { return false; }
- $tbl_quiz_answer = Database::get_course_table(TABLE_QUIZ_ANSWER);
- $tbl_quiz_question = Database::get_course_table(TABLE_QUIZ_QUESTION);
- if (empty($course_id)) {
- $course_id = api_get_course_int_id();
- }
- $position = 1;
- $question_id = filter_var($question_id,FILTER_SANITIZE_NUMBER_INT);
- $score = filter_var($score,FILTER_SANITIZE_NUMBER_FLOAT);
- $correct = filter_var($correct,FILTER_SANITIZE_NUMBER_INT);
- // Get the max position
- $sql = "SELECT max(position) as max_position FROM $tbl_quiz_answer "
- ." WHERE c_id = $course_id AND question_id = $question_id";
- $rs_max = Database::query($sql);
- $row_max = Database::fetch_object($rs_max);
- $position = $row_max->max_position + 1;
- // Insert a new answer
- $sql = "INSERT INTO $tbl_quiz_answer "
- ."(c_id, id, question_id,answer,correct,comment,ponderation,position,destination)"
- ."VALUES ($course_id, $id,$question_id,'".Database::escape_string($answer_title)."',"
- ."$correct,'".Database::escape_string($comment)."',$score,$position, "
- ." '0@@0@@0@@0')";
- $rs = Database::query($sql);
- if ($correct) {
- $sql = "UPDATE $tbl_quiz_question "
- ." SET ponderation = (ponderation + $score) WHERE c_id = $course_id AND id = ".$question_id;
- $rs = Database::query($sql);
- return $rs;
- }
- }
- }
- endif;
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