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<?php

add_action('wpcf7_init', 'wpcf7_add_form_tag_quiz', 10, 0);
function wpcf7_add_form_tag_quiz()
{
    wpcf7_add_form_tag('quiz', 'wpcf7_quiz_form_tag_handler', array('name-attr' => true, 'do-not-store' => true, 'not-for-mail' => true));
}
function wpcf7_quiz_form_tag_handler($tag)
{
    if (empty($tag->name)) {
        return '';
    }
    $validation_error = wpcf7_get_validation_error($tag->name);
    $class = wpcf7_form_controls_class($tag->type);
    if ($validation_error) {
        $class .= ' wpcf7-not-valid';
    }
    $atts = array();
    $atts['size'] = $tag->get_size_option('40');
    $atts['maxlength'] = $tag->get_maxlength_option();
    $atts['minlength'] = $tag->get_minlength_option();
    if ($atts['maxlength'] and $atts['minlength'] and $atts['maxlength'] < $atts['minlength']) {
        unset($atts['maxlength'], $atts['minlength']);
    }
    $atts['class'] = $tag->get_class_option($class);
    $atts['id'] = $tag->get_id_option();
    $atts['tabindex'] = $tag->get_option('tabindex', 'signed_int', true);
    $atts['autocomplete'] = 'off';
    $atts['aria-required'] = 'true';
    if ($validation_error) {
        $atts['aria-invalid'] = 'true';
        $atts['aria-describedby'] = wpcf7_get_validation_error_reference($tag->name);
    } else {
        $atts['aria-invalid'] = 'false';
    }
    $pipes = $tag->pipes;
    if ($pipes instanceof WPCF7_Pipes and !$pipes->zero()) {
        $pipe = $pipes->random_pipe();
        $question = $pipe->before;
        $answer = $pipe->after;
    } else {
        $question = '1+1=?';
        $answer = '2';
    }
    $answer = wpcf7_canonicalize($answer, array('strip_separators' => true));
    $atts['type'] = 'text';
    $atts['name'] = $tag->name;
    $atts = wpcf7_format_atts($atts);
    $html = sprintf('<span class="wpcf7-form-control-wrap %1$s"><label><span class="wpcf7-quiz-label">%2$s</span> <input %3$s /></label><input type="hidden" name="_wpcf7_quiz_answer_%4$s" value="%5$s" />%6$s</span>', sanitize_html_class($tag->name), esc_html($question), $atts, $tag->name, wp_hash($answer, 'wpcf7_quiz'), $validation_error);
    return $html;
}
add_filter('wpcf7_validate_quiz', 'wpcf7_quiz_validation_filter', 10, 2);
function wpcf7_quiz_validation_filter($result, $tag)
{
    $name = $tag->name;
    $answer = isset($_POST[$name]) ? wp_unslash($_POST[$name]) : '';
    $answer = wpcf7_canonicalize($answer, array('strip_separators' => true));
    $answer_hash = wp_hash($answer, 'wpcf7_quiz');
    $expected_hash = isset($_POST['_wpcf7_quiz_answer_' . $name]) ? (string) $_POST['_wpcf7_quiz_answer_' . $name] : '';
    if (!hash_equals($expected_hash, $answer_hash)) {
        $result->invalidate($tag, wpcf7_get_message('quiz_answer_not_correct'));
    }
    return $result;
}
add_filter('wpcf7_refill_response', 'wpcf7_quiz_ajax_refill', 10, 1);
add_filter('wpcf7_feedback_response', 'wpcf7_quiz_ajax_refill', 10, 1);
function wpcf7_quiz_ajax_refill($items)
{
    if (!is_array($items)) {
        return $items;
    }
    $fes = wpcf7_scan_form_tags(array('type' => 'quiz'));
    if (empty($fes)) {
        return $items;
    }
    $refill = array();
    foreach ($fes as $fe) {
        $name = $fe['name'];
        $pipes = $fe['pipes'];
        if (empty($name)) {
            continue;
        }
        if ($pipes instanceof WPCF7_Pipes and !$pipes->zero()) {
            $pipe = $pipes->random_pipe();
            $question = $pipe->before;
            $answer = $pipe->after;
        } else {
            $question = '1+1=?';
            $answer = '2';
        }
        $answer = wpcf7_canonicalize($answer, array('strip_separators' => true));
        $refill[$name] = array($question, wp_hash($answer, 'wpcf7_quiz'));
    }
    if (!empty($refill)) {
        $items['quiz'] = $refill;
    }
    return $items;
}
add_filter('wpcf7_mail_tag_replaced_quiz', 'wpcf7_quiz_mail_tag', 10, 4);
function wpcf7_quiz_mail_tag($replaced, $submitted, $html, $mail_tag)
{
    $field_name = $mail_tag->field_name();
    $submitted = isset($_POST[$field_name]) ? $_POST[$field_name] : '';
    $replaced = $submitted;
    if ($html) {
        $replaced = esc_html($replaced);
        $replaced = wptexturize($replaced);
    }
    return $replaced;
}
add_filter('wpcf7_messages', 'wpcf7_quiz_messages', 10, 1);
function wpcf7_quiz_messages($messages)
{
    $messages = array_merge($messages, array('quiz_answer_not_correct' => array('description' => __("Sender doesn't enter the correct answer to the quiz", 'contact-form-7'), 'default' => __("The answer to the quiz is incorrect.", 'contact-form-7'))));
    return $messages;
}
add_action('wpcf7_admin_init', 'wpcf7_add_tag_generator_quiz', 40, 0);
function wpcf7_add_tag_generator_quiz()
{
    $tag_generator = WPCF7_TagGenerator::get_instance();
    $tag_generator->add('quiz', __('quiz', 'contact-form-7'), 'wpcf7_tag_generator_quiz');
}
function wpcf7_tag_generator_quiz($contact_form, $args = '')
{
    $args = wp_parse_args($args, array());
    $type = 'quiz';
    $description = __("Generate a form-tag for a question-answer pair. For more details, see %s.", 'contact-form-7');
    $desc_link = wpcf7_link(__('https://contactform7.com/quiz/', 'contact-form-7'), __('Quiz', 'contact-form-7'));
    ?>
<div class="control-box">
<fieldset>
<legend><?php 
    echo sprintf(esc_html($description), $desc_link);
    ?></legend>

</tbody>
</table>
</fieldset>
</div>

<div class="insert-box">
	<input type="text" name="<?php 
    echo $type;
    ?>" class="tag code" readonly="readonly" onfocus="this.select()" />

<div class="submitbox">
	<input type="button" class="button button-primary insert-tag" value="<?php 
    echo esc_attr(__('Insert Tag', 'contact-form-7'));
    ?>" />
	</div>
</div>
<?php 
}