chamilo-lms2/main/exercice/fill_blanks.class.php

<?php
/* For licensing terms, see /license.txt */
/**
 *    File containing the FillBlanks class.
 * @package chamilo.exercise
 * @author Eric Marguin
 * @author Julio Montoya Armas switchable fill in blank option added
 * @version $Id: admin.php 10680 2007-01-11 21:26:23Z pcool $
 */
/**
 * Code
 */

/**
 *   CLASS FillBlanks
 *
 *    This class allows to instantiate an object of type MULTIPLE_ANSWER (MULTIPLE CHOICE, MULTIPLE ANSWER),
 *    extending the class question
 *
 * @author Eric Marguin
 * @author Julio Montoya multiple fill in blank option added
 * @package chamilo.exercise
 **/

class FillBlanks extends Question
{
    static $typePicture = 'fill_in_blanks.gif';
    static $explanationLangVar = 'FillBlanks';

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

    /**
     * function which redifines Question::createAnswersForm
     * @param \FormValidator instance
     */
    public function createAnswersForm($form)
    {
        $defaults     = array();
        $a_weightings = null;

        if (!empty($this->id)) {
            $objAnswer = new Answer($this->id);

            // the question is encoded like this.
            // [A] B [C] D [E] F::10,10,10@1
            // number 1 before the "@" means that is a switchable fill in blank question
            // [A] B [C] D [E] F::10,10,10@ or  [A] B [C] D [E] F::10,10,10
            // means that is a normal fill blank question

            $answer_id = $objAnswer->getRealAnswerIdFromList(1);
            $pre_array = explode('::', $objAnswer->selectAnswer($answer_id));

            //make sure we only take the last bit to find special marks
            $sz                = count($pre_array);
            $is_set_switchable = explode('@', $pre_array[$sz - 1]);
            if ($is_set_switchable[1]) {
                $defaults['multiple_answer'] = 1;
            } else {
                $defaults['multiple_answer'] = 0;
            }

            //take the complete string except after the last '::'
            $defaults['answer'] = '';
            for ($i = 0; $i < ($sz - 1); $i++) {
                $defaults['answer'] .= $pre_array[$i];
            }
            $a_weightings = explode(',', $is_set_switchable[0]);
        } else {
            $defaults['answer'] = get_lang('DefaultTextInBlanks');
        }

        // javascript
        echo '<script>

            function processFields(answer) {
                var blanks = answer.match(/\[[^\]]*\]/g);
                var fields = "<div class=\"control-group\"><label class=\"control-label\">'.get_lang('Weighting').'</label><div class=\"controls\"><table>";

                if (blanks!=null) {
                    for (i=0 ; i<blanks.length ; i++){
                        if (document.getElementById("weighting["+i+"]")) {
                            value = document.getElementById("weighting["+i+"]").value;
                        } else {
                            value = "10";
                        }
                        fields += "<tr><td>"+blanks[i]+"</td><td><input style=\"margin-left: 0em;\" size=\"5\" value=\""+value+"\" type=\"text\" id=\"weighting["+i+"]\" name=\"weighting["+i+"]\" /></td></tr>";
                    }
                    document.getElementById("blanks_weighting").innerHTML = fields + "</table></div></div>";
                }
            }

            function updateBlanks() {
                var answer = "";
                var editor = CKEDITOR.instances["answer"];
                if (editor) {
                    editor.on("instanceReady", function(){
                        answer = editor.getData();
                        processFields(answer);
                        this.document.on("keyup", function() {
                            answer = editor.getData();
                            processFields(answer);
                        });
                    });
                } else {
                    field = document.getElementById("answer");
                    answer = field.value;
                    processFields(answer);
                }
			';
        if (count($a_weightings) > 0) {
            foreach ($a_weightings as $i => $weighting) {
                echo '$("#weighting['.$i.']").attr("value", "'.$weighting.'");';
            }
        }
        echo '
            }
            window.onload = updateBlanks;
		</script>';

        // answer
        $form->addElement(
            'label',
            null,
            '<br /><br />'.get_lang('TypeTextBelow').', '.get_lang('And').' '.get_lang('UseTagForBlank')
        );

        $form->addElement('html_editor','answer', Display::return_icon('fill_field.png'), 'id="answer" cols="122" rows="6" onkeyup="javascript: updateBlanks(this);"', array('ToolbarSet' => 'TestQuestionDescription', 'Width' => '100%', 'Height' => '350'));

        $form->addRule('answer', get_lang('GiveText'), 'required');
        $form->addRule('answer', get_lang('DefineBlanks'), 'regex', '/\[.*\]/');

        //added multiple answers
        $form->addElement('checkbox', 'multiple_answer', '', get_lang('FillInBlankSwitchable'));

        $form->addElement('html', '<div id="blanks_weighting"></div>');

        // setting the save button here and not in the question class.php
        $form->addElement('style_submit_button', 'submitQuestion', $this->submitText, 'class="'.$this->submitClass.'"');

        if (!empty($this->id)) {
            $form->setDefaults($defaults);
        } else {
            if ($this->isContent == 1) {
                $form->setDefaults($defaults);
            }
        }
    }


    /**
     * abstract function which creates the form to create / edit the answers of the question
     * @param the formvalidator instance
     */
    function processAnswersCreation($form)
    {
        global $charset;

        $answer = $form->getSubmitValue('answer');
        //Due the fckeditor transform the elements to their HTML value
        $answer = api_html_entity_decode($answer, ENT_QUOTES, $charset);

        //remove the :: eventually written by the user
        $answer = str_replace('::', '', $answer);

        // get the blanks weightings
        $nb = preg_match_all('/\[[^\]]*\]/', $answer, $blanks);
        if (isset($_GET['editQuestion'])) {
            $this->weighting = 0;
        }

        if ($nb > 0) {
            $answer .= '::';
            for ($i = 0; $i < $nb; ++$i) {
                $answer .= $form->getSubmitValue('weighting['.$i.']').',';
                $this->weighting += $form->getSubmitValue('weighting['.$i.']');
            }
            $answer = api_substr($answer, 0, -1);
        }
        $is_multiple = $form->getSubmitValue('multiple_answer');
        $answer .= '@'.$is_multiple;

        $this->save();
        $objAnswer = new answer($this->id);
        $objAnswer->createAnswer($answer, 0, '', 0, '');
        $objAnswer->save();
    }

    /**
     * {@inheritdoc}
     */
    function return_header($feedback_type = null, $counter = null, $score = null, $show_media = false, $hideTitle = 0)
    {
        $header = parent::return_header($feedback_type, $counter, $score, $show_media, $hideTitle);
        $header .= '<table class="'.$this->question_table_class.'">
			<tr>
                <th>'.get_lang("Answer").'</th>
			</tr>';

        return $header;
    }
}