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

<?php
/* For licensing terms, see /license.txt */
/**
 *
 *    This class allows to instantiate an object of type UNIQUE_ANSWER_IMAGE
 *    extending the class question
 *

 * @author Julio Montoya
 * @package chamilo.exercise
 **/

class UniqueAnswerImage extends UniqueAnswer
{

    static $typePicture = 'mcua.gif';
    static $explanationLangVar = 'UniqueSelect';

    /**
     * Constructor
     */
    public function UniqueAnswerImage()
    {
        //this is highly important
        parent::question();
        $this->type      = UNIQUE_ANSWER_IMAGE;
        $this->isContent = $this->getIsContent();
    }

    /**
     * function which redifines Question::createAnswersForm
     * @param FormValidator instance

     */
    public function createAnswersForm($form)
    {
        // Getting the exercise list
        $obj_ex = $this->exercise;

        $editor_config = array('ToolbarSet' => 'UniqueAnswerImage', '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));

        $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 />'.Display::return_icon('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');

        $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"', $editor_config);
            /*
            if ($obj_ex->fastEdition) {
                $form->addElement('textarea', 'answer['.$i.']', null, $this->textareaSettings);
            } else {
                $form->addElement('html_editor', 'answer['.$i.']', null, 'style="vertical-align:middle"', $editor_config);
            }*/

            $form->addRule('answer['.$i.']', get_lang('ThisFieldIsRequired'), 'required');

            if ($obj_ex->selectFeedbackType() == EXERCISE_FEEDBACK_TYPE_END) {
                if ($obj_ex->fastEdition) {
                    // feedback
                    $form->addElement(
                        'textarea',
                        'comment['.$i.']',
                        null,
                        $this->textareaSettings
                    );
                } else {
                    // 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();

        //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', $this->submitText, 'class="'.$this->submitClass.'"');
            } 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', $this->submitText, 'class="'.$this->submitClass.'"');
            }
        }
        $renderer->setElementTemplate('{element}&nbsp;', 'submitQuestion');
        $renderer->setElementTemplate('{element}&nbsp;', 'lessAnswers');
        $renderer->setElementTemplate('{element}&nbsp;', '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 FormValidator instance
     */
    public 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]);
            $goodAnswer = ($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();
    }

    /**
     * {@inheritdoc}
     */
    public function return_header($feedback_type = null, $counter = null, $score = null, $show_media = false, $hideTitle = 0)
    {
        return parent::return_header($feedback_type, $counter, $score, $show_media, $hideTitle);
    }
}