How to find the quiz id on the page template?

[advcha]

I created a simple plugin to set and get a pdf path like this:

<?php
...
add_action('wpProQuiz_quizEdit_tab_content_plugins', 'pdf_path');

function pdf_path()
{
    $quizId = isset($_GET['quizId']) ? (int)$_GET['quizId'] : 0;
    $pdf_path = '';
    if($quizId){
        $quiz = new WpProQuiz_Model_QuizMapper();
        $quiz_data = $quiz->fetch($quizId);
        $quiz_plugin = $quiz_data->getPluginContainer();
        if($quiz_plugin){
            $pdf_path = $quiz_plugin->get("'pdf_path'");
        }
    }
?>
    <div class="postbox">
        <h3 class="hndle">PDF Handbook (Optional)</h3>

        <div class="inside">
            <p class="description">
                Please upload the pdf handbook file first via <a href="<?php echo admin_url(); ?>upload.php">media upload</a> then copy the path on the box below.                
            </p>
            <div>
                Pdf Handbook Path : <input type="text" name="plugin['pdf_path']" size="100" value="<?php echo $pdf_path; ?>">
            </div>
        </div>
    </div>
<?php
}
?>

but on the page template (frontpage) I can't find a way to get the current quiz id. I put the quiz shortcode on the page with customized template but I dont know how to find put the quiz id. it should be like this:

<?php
            $quizId = 1; //hardcoded. how to get the current quiz id???
            $pdf_path = '';
            
            $quiz = new WpProQuiz_Model_QuizMapper();
            $quiz_data = $quiz->fetch($quizId);
            $quiz_plugin = $quiz_data->getPluginContainer();
            if($quiz_plugin){
                $pdf_path = $quiz_plugin->get("'pdf_path'");
            }
            
            if($pdf_path){
        ?>

Also I found a problem on Wp-Pro-Quiz/lib/model/WpProQuiz_Model_PluginContainer.php. the 'exists' function supposed to be like this

    public function exists($name)
    {
        //return isset($name);//--> not correct
        return isset($this->_data[$name]);
    }