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