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<?php
/*
 * Copyright (C) 2017-present, Meta, Inc.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License.
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

/**
 * @package FacebookPixelPlugin
 */

namespace FacebookPixelPlugin\Integration;

defined('ABSPATH') or die('Direct access not allowed');

use FacebookPixelPlugin\Core\FacebookPluginUtils;
use FacebookPixelPlugin\Core\FacebookServerSideEvent;
use FacebookPixelPlugin\Core\FacebookWordPressOptions;
use FacebookPixelPlugin\Core\ServerEventFactory;
use FacebookPixelPlugin\Core\PixelRenderer;
use FacebookAds\Object\ServerSide\Event;
use FacebookAds\Object\ServerSide\UserData;

class FacebookWordpressContactForm7 extends FacebookWordpressIntegrationBase {
  const PLUGIN_FILE = 'contact-form-7/wp-contact-form-7.php';
  const TRACKING_NAME = 'contact-form-7';

public static function injectPixelCode() {
    add_action(
      'wpcf7_submit',
      array(__CLASS__, 'trackServerEvent'),
      10, 2);
    add_action(
      'wp_footer',
      array(__CLASS__, 'injectMailSentListener'),
      10, 2);
  }

public static function injectMailSentListener(){
    ob_start();
    ?>
    
    <script type='text/javascript'>
        document.addEventListener( 'wpcf7mailsent', function( event ) {
        if( "fb_pxl_code" in event.detail.apiResponse){
          eval(event.detail.apiResponse.fb_pxl_code);
        }
      }, false );
    </script>
    
    <?php
    $listenerCode = ob_get_clean();
    echo $listenerCode;
  }

public static function trackServerEvent($form, $result) {
    $isInternalUser = FacebookPluginUtils::isInternalUser();
    $submitFailed = $result['status'] !== 'mail_sent';
    if ($isInternalUser || $submitFailed) {
      return $result;
    }

$server_event = ServerEventFactory::safeCreateEvent(
      'Lead',
      array(__CLASS__, 'readFormData'),
      array($form),
      self::TRACKING_NAME,
      true
    );
    FacebookServerSideEvent::getInstance()->track($server_event);

add_action(
      'wpcf7_feedback_response',
      array(__CLASS__, 'injectLeadEvent'),
      20, 2);

return $result;
  }

public static function injectLeadEvent($response, $result) {
    if (FacebookPluginUtils::isInternalUser()) {
      return $response;
    }

$events = FacebookServerSideEvent::getInstance()->getTrackedEvents();
    if( count($events) == 0 ){
      return $response;
    }
    $event_id = $events[0]->getEventId();
    $fbq_calls = PixelRenderer::render($events, self::TRACKING_NAME, false);
    $code = sprintf("
if( typeof window.pixelLastGeneratedLeadEvent === 'undefined'
  || window.pixelLastGeneratedLeadEvent != '%s' ){
  window.pixelLastGeneratedLeadEvent = '%s';
  %s
}
      ",
      $event_id ,
      $event_id ,
      $fbq_calls);

$response['fb_pxl_code'] = $code;
    return $response;
  }

public static function readFormData($form) {
    if (empty($form)) {
      return array();
    }

$form_tags = $form->scan_form_tags();
    $name = self::getName($form_tags);

return array(
      'email' => self::getEmail($form_tags),
      'first_name' => $name[0],
      'last_name' => $name[1],
      'phone' => self::getPhone($form_tags)
    );
  }

private static function getEmail($form_tags) {
    if (empty($form_tags)) {
      return null;
    }

foreach ($form_tags as $tag) {
      if ($tag->basetype == "email") {
        return $_POST[$tag->name];
      }
    }

return null;
  }

private static function getName($form_tags) {
    if (empty($form_tags)) {
      return null;
    }

foreach ($form_tags as $tag) {
      if ($tag->basetype === "text"
        && strpos(strtolower($tag->name), 'name') !== false) {
        return ServerEventFactory::splitName($_POST[$tag->name]);
      }
    }

return null;
  }

private static function getPhone($form_tags) {
    if (empty($form_tags)) {
      return null;
    }

foreach ($form_tags as $tag) {
      if ($tag->basetype === "tel") {
        return $_POST[$tag->name];
      }
    }

return null;
  }

}