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476 lines
17 KiB
476 lines
17 KiB
<?php
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/* For licensing terms, see /license.txt */
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/**
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* Class UniqueAnswer
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*
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* This class allows to instantiate an object of type UNIQUE_ANSWER
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* (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.png';
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static $explanationLangVar = 'UniqueSelect';
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/**
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* Constructor
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*/
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public function __construct()
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{
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//this is highly important
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parent::__construct();
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$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 redefines Question::createAnswersForm
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* @param FormValidator $form
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*/
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public function createAnswersForm($form)
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{
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// Getting the exercise list
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$obj_ex = $_SESSION['objExercise'];
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$editor_config = array(
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'ToolbarSet' => 'TestProposedAnswer',
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'Width' => '100%',
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'Height' => '125'
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);
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//this line defines how many questions by default appear when creating a choice question
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// The previous default value was 2. See task #1759.
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$nb_answers = isset($_POST['nb_answers']) ? (int) $_POST['nb_answers'] : 4;
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$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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if ($obj_ex->selectFeedbackType() == EXERCISE_FEEDBACK_TYPE_DIRECT) {
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//Scenario
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$comment_title = '<th width="20%">' . get_lang('Comment') . '</th>';
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$feedback_title = '<th width="20%">' . get_lang('Scenario') . '</th>';
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} else {
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$comment_title = '<th width="40%">' . get_lang('Comment') . '</th>';
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}
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$html = '<table class="table table-striped table-hover">
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<thead>
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<tr style="text-align: center;">
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<th width="5%">' . get_lang('Number') . '</th>
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<th width="5%"> ' . get_lang('True') . '</th>
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<th width="40%">' . get_lang('Answer') . '</th>
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' . $comment_title . '
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' . $feedback_title . '
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<th width="10%">' . get_lang('Weighting') . '</th>
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</tr>
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</thead>
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<tbody>';
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$form->addHeader(get_lang('Answers'));
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$form->addHtml($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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$select_question[$questionid] = 'Q' . $key . ' :' . cut(
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$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[$id] = cut($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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$nb_answers = 1;
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Display::display_normal_message(
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get_lang('YouHaveToCreateAtLeastOneAnswer')
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);
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}
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for ($i = 1; $i <= $nb_answers; ++$i) {
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$form->addHtml('<tr>');
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if (isset($answer) && is_object($answer)) {
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if ($answer->correct[$i]) {
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$correct = $i;
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}
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$defaults['answer[' . $i . ']'] = $answer->answer[$i];
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$defaults['comment[' . $i . ']'] = $answer->comment[$i];
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$defaults['weighting[' . $i . ']'] = float_format(
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$answer->weighting[$i],
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1
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);
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$item_list = explode('@@', $answer->destination[$i]);
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$try = isset($item_list[0]) ? $item_list[0] : '';
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$lp = isset($item_list[1]) ? $item_list[1] : '';
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$list_dest = isset($item_list[2]) ? $item_list[2] : '';
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$url = isset($item_list[3]) ? $item_list[3] : '';
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if ($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] = $list_dest;
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} else {
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$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(
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'text', 'counter[' . $i . ']', null, ' value = "' . $i . '"'
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);
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$answer_number->freeze();
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$form->addElement(
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'radio', 'correct', null, null, $i, 'class="checkbox"'
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);
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$form->addHtmlEditor('answer[' . $i . ']', null, null, true, $editor_config);
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$form->addRule(
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'answer[' . $i . ']', get_lang('ThisFieldIsRequired'), 'required'
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);
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if ($obj_ex->selectFeedbackType() == EXERCISE_FEEDBACK_TYPE_DIRECT) {
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$form->addHtmlEditor('comment[' . $i . ']', null, null, false, $editor_config);
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// Direct feedback
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//Adding extra feedback fields
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$group = array();
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$group['try' . $i] = $form->createElement(
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'checkbox',
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'try' . $i,
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null,
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get_lang('TryAgain')
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);
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$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' . $i,
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get_lang('Other') . ': ',
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array(
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'class' => 'col-md-2',
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'placeholder' => get_lang('Other')
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)
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);
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$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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} else {
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$form->addHtmlEditor('comment[' . $i . ']', null, null, false, $editor_config);
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}
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$form->addText('weighting[' . $i . ']', null, null, array('value' => '0'));
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$form->addHtml('</tr>');
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}
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$form->addHtml('</tbody>');
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$form->addHtml('</table>');
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global $text;
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$buttonGroup = [];
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//ie6 fix
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if ($obj_ex->edit_exercise_in_lp == true) {
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//setting the save button here and not in the question class.php
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$buttonGroup[] = $form->addButtonDelete(get_lang('LessAnswer'), 'lessAnswers', true);
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$buttonGroup[] = $form->addButtonCreate(get_lang('PlusAnswer'), 'moreAnswers', true);
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$buttonGroup[] = $form->addButtonSave($text, 'submitQuestion', true);
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$form->addGroup($buttonGroup);
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}
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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 ($this->isContent == 1) {
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// Default sample content.
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$form->setDefaults($defaults);
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} else {
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$form->setDefaults(array('correct' => 1));
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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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* Receives the unique answer question type creation form data and creates
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* or updates the answers from that question
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* @param FormValidator $form
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*/
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public function processAnswersCreation($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 $destination_id)
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{
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$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(
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$answer,
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$goodAnswer,
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$comment,
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$weighting,
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$i,
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null,
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null,
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$dest
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);
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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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/**
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* Helper function to print the column titles in the answers edition form
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* @param null $feedback_type The type of feedback influences what columns are shown to the editor
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* @param null $counter The number of answers to show, in case there should be pagination
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* @param null $score The maximum score for the question
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* @return string HTML string for a table header + a wrapper before it
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*/
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public function return_header(
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$feedback_type = null,
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$counter = null,
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$score = null
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) {
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$header = parent::return_header($feedback_type, $counter, $score);
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$header .= '<table class="' . $this->question_table_class . '">
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<tr>
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<th>' . get_lang("Choice") . '</th>
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<th>' . get_lang("ExpectedChoice") . '</th>
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<th>' . get_lang("Answer") . '</th>';
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$header .= '<th>' . get_lang("Comment") . '</th>';
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$header .= '</tr>';
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return $header;
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}
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/**
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* Saves one answer to the database
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* @param int $id The ID of the answer (has to be calculated for this course)
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* @param int $question_id The question ID (to which the answer is attached)
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* @param string $title The text of the answer
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* @param string $comment The feedback for the answer
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* @param double $score The score you get when picking this answer
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* @param integer $correct Whether this answer is considered *the* correct one (this is the unique answer type)
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*/
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public function addAnswer(
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$id,
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$question_id,
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$title,
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$comment,
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$score = 0.0,
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$correct = 0
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) {
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$tbl_quiz_answer = Database::get_course_table(TABLE_QUIZ_ANSWER);
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$tbl_quiz_question = Database::get_course_table(TABLE_QUIZ_QUESTION);
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$course_id = api_get_course_int_id();
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$question_id = intval($question_id);
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$score = floatval($score);
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$correct = intval($correct);
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$title = Database::escape_string($title);
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$comment = Database::escape_string($comment);
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// Get the max position.
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$sql = "SELECT max(position) as max_position
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FROM $tbl_quiz_answer
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WHERE
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c_id = $course_id AND
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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 = $row_max->max_position + 1;
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// Insert a new answer
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$params = [
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'c_id' => $course_id,
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'id' => $id,
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'question_id' => $question_id,
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'answer' => $title,
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'correct' => $correct,
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'comment' => $comment,
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'ponderation' => $score,
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'position' => $position,
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'destination' => '0@@0@@0@@0',
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];
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$id = Database::insert($tbl_quiz_answer, $params);
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if ($id) {
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$sql = "UPDATE $tbl_quiz_answer SET id = iid WHERE iid = $id";
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Database::query($sql);
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}
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if ($correct) {
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$sql = "UPDATE $tbl_quiz_question
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SET ponderation = (ponderation + $score)
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WHERE c_id = $course_id AND id = " . $question_id;
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Database::query($sql);
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}
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}
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}
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