chamilo-lms2/main/exercise/unique_answer_no_option.class.php

<?php
/* For licensing terms, see /license.txt */

use ChamiloSession as Session;

/**
 * Class UniqueAnswerNoOption
 * 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 UniqueAnswerNoOption extends Question
{
	public static $typePicture = 'mcuao.png';
	public static $explanationLangVar = 'UniqueAnswerNoOption';

	/**
	 * Constructor
	 */
	public function __construct()
    {
		parent::__construct();
		$this -> type = UNIQUE_ANSWER_NO_OPTION;
		$this -> isContent = $this-> getIsContent();
	}

	/**
     * function which redifines Question::createAnswersForm
     * @param the formvalidator instance
     * @param the answers number to display
     */
    public function createAnswersForm($form)
    {
        // getting the exercise list
        $obj_ex = Session::read('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'] : 3;  // 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() == 1) {
            $editor_config['Width'] = '250';
            $editor_config['Height'] = '110';
            $comment_title = '<th width="50%" >' . get_lang('Comment') . '</th>';
            $feedback_title = '<th width="50%" >' . get_lang('Scenario') . '</th>';
        } else {
            $comment_title = '<th width="50%">' . get_lang('Comment') . '</th>';
        }

        $html = '<table class="table table-striped table-hover">';
        $html .= '<thead>';
        $html .= '<tr>';
        $html .= '<th>' . get_lang('Number') . '</th>';
        $html .= '<th>' . get_lang('True') . '</th>';
        $html .= '<th width="50%">' . get_lang('Answer') . '</th>';
        $html .= $comment_title . $feedback_title;
        $html .= '<th>' . get_lang('Weighting') . '</th>';
        $html .= '</tr>';
        $html .= '</thead>';
        $html .= '<tbody>';

        $form->addHeader(get_lang('Answers'));
        $form->addHtml($html);

        $defaults = array();
        $correct = 0;
        $answer = false;
        if (!empty($this->id)) {
            $answer = new Answer($this->id);
            $answer->read();
            if (count($answer->nbrAnswers) > 0 && !$form->isSubmitted()) {
                $nb_answers = $answer->nbrAnswers;
            }
        }

        $temp_scenario = array();

        if ($nb_answers < 1) {
            $nb_answers = 1;
            Display::display_normal_message(get_lang('YouHaveToCreateAtLeastOneAnswer'));
        }
        $editQuestion = isset($_GET['editQuestion']) ? $_GET['editQuestion'] : false;
        if ($editQuestion) {
            //fixing $nb_answers
            $new_list = array();
            $count = 1;
            if (isset($_POST['lessAnswers'])) {
                $lessFromSession = Session::read('less_answer');
                if (!isset($lessFromSession)) {
                    Session::write('less_answer', $this->id);
                    $nb_answers--;
                }
            }
            for ($k = 1; $k <= $nb_answers; ++$k) {
                if ($answer->position[$k] != '666') {
                    $new_list[$count] = $count;
                    $count++;
                }
            }
        } else {
            for ($k = 1; $k <= $nb_answers; ++$k) {
                $new_list[$k] = $k;
            }
        }

        $i = 1;
        //for ($k = 1 ; $k <= $real_nb_answers; $k++) {
        foreach ($new_list as $key) {
            $i = $key;
            $form->addElement('html', '<tr>');

            if (is_object($answer)) {
                if ($answer->position[$i] == 666) {
                    //we set nothing
                } else {
                    if ($answer->correct[$i]) {
                        $correct = $i;
                    }
                    $answer_result = $answer->answer[$i];
                    $weight_result = float_format($answer->weighting[$i], 1);
                    if ($nb_answers == $i) {
                        $weight_result = '0';
                    }

                    $defaults['answer[' . $i . ']'] = $answer_result;
                    $defaults['comment[' . $i . ']'] = $answer->comment[$i];
                    $defaults['weighting[' . $i . ']'] = $weight_result;

                    $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;
                }
            }

            $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->addHtmlEditor('answer[' . $i . ']', null, array(), false, $editor_config);

            $form->addHtmlEditor('comment[' . $i . ']', null, array(), false, $editor_config);
            $form->addElement('text', 'weighting[' . $i . ']', null, array('style' => 'width: 60px;', 'value' => '0'));
            $form->addElement('html', '</tr>');
            $i++;
        }

        if (empty($this->id)) {
            $form->addElement('hidden', 'new_question', 1);
        }

        //Adding the "I don't know" question answer
        //if (empty($this -> id)) {
        $i = 666;
        $form->addHtml('<tr>');

        $defaults["counter[$i]"] = '-';
        $defaults['answer[' . $i . ']'] = get_lang('DontKnow');
        $defaults['weighting[' . $i . ']'] = '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="-"');
        $answer_number->freeze();

        $form->addElement('hidden', 'position[' . $i . ']', '666');

        $form->addElement('radio', 'correct', null, null, $i, 'class="checkbox" style="margin-left: 0em;"');
        $form->addHtmlEditor('answer[' . $i . ']', null, array(), false, $editor_config);

        $form->addRule('answer[' . $i . ']', get_lang('ThisFieldIsRequired'), 'required');
        $form->addHtmlEditor('comment[' . $i . ']', null, array(), false, $editor_config);

        //$form->addElement('select', 'destination'.$i, get_lang('SelectQuestion').' : ',$select_question,'multiple');

        $form->addText("weighting[$i]", null, false, ['style' => 'width: 60px;', 'value' => 0, 'readonly' => 'readonly']);

        $form->addHTml('</tr>');
        $form->addHtml('</tbody></table>');

        $buttonGroup = [];

        global $text, $class;
        //ie6 fix
        if ($obj_ex->edit_exercise_in_lp == true) {
            //setting the save button here and not in the question class.php
            $buttonGroup[] = $form->addButtonDelete(get_lang('LessAnswer'), 'lessAnswers', true);
            $buttonGroup[] = $form->addButtonCreate(get_lang('PlusAnswer'), 'moreAnswers', true);
            $buttonGroup[] = $form->addButtonSave($text, 'submitQuestion', true);

            $form->addGroup($buttonGroup);
        }

        //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 {
            $form->setDefaults($defaults);
        }

        $form->addElement('hidden', 'nb_answers');
        $form->setConstants(array('nb_answers' => $nb_answers));
    }

    /**
	 * 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');
		$minus = 1;
		if ($form -> getSubmitValue('new_question')) {
		    $minus = 0;
		}

		for ($i=1 ; $i <= $nb_answers - $minus; $i++) {
		    $position   = trim($form -> getSubmitValue('position['.$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);
        }

        //Create 666 answer
        $i = 666;
        $answer     = trim($form -> getSubmitValue('answer['.$i.']'));
        $comment    = trim($form -> getSubmitValue('comment['.$i.']'));
        $weighting  = trim($form -> getSubmitValue('weighting['.$i.']'));
        $goodAnswer= ($correct == $i) ? true : false;
        $dest       = '';

        $objAnswer -> createAnswer($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)
    {
	    $header = parent::return_header($feedback_type, $counter, $score);
	    $header .= '<table class="'.$this->question_table_class .'">
			<tr>
				<th>'.get_lang("Choice").'</th>
				<th>'. get_lang("ExpectedChoice").'</th>
				<th>'. get_lang("Answer").'</th>';
        $header .= '<th>'.get_lang("Comment").'</th>';
        $header .= '</tr>';
        return $header;
	}
}