CspSubscriber.php in Googalytics - Google Analytics 8

Namespace

Drupal\ga\EventSubscriber

File

src/EventSubscriber/CspSubscriber.php

<?php

namespace Drupal\ga\EventSubscriber;

use Drupal\csp\CspEvents;
use Drupal\csp\Event\PolicyAlterEvent;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;

/**
 * Alter CSP policy for Google Analytics.
 */
class CspSubscriber implements EventSubscriberInterface {
  const TRACKING_DOMAIN = 'https://www.google-analytics.com';

  /**
   * {@inheritdoc}
   */
  public static function getSubscribedEvents() {
    if (!class_exists(CspEvents::class)) {
      return [];
    }
    $events[CspEvents::POLICY_ALTER] = [
      'onCspPolicyAlter',
    ];
    return $events;
  }

  /**
   * Alter CSP policy for tracking requests.
   *
   * @param \Drupal\csp\Event\PolicyAlterEvent $alterEvent
   *   The Policy Alter event.
   */
  public function onCspPolicyAlter(PolicyAlterEvent $alterEvent) {
    $policy = $alterEvent
      ->getPolicy();
    if ($policy
      ->hasDirective('img-src')) {
      $policy
        ->appendDirective('img-src', [
        self::TRACKING_DOMAIN,
      ]);
    }
    elseif ($policy
      ->hasDirective('default-src')) {
      $imgDirective = array_merge($policy
        ->getDirective('default-src'), [
        self::TRACKING_DOMAIN,
      ]);
      $policy
        ->setDirective('img-src', $imgDirective);
    }
    if ($policy
      ->hasDirective('connect-src')) {
      $policy
        ->appendDirective('connect-src', [
        self::TRACKING_DOMAIN,
      ]);
    }
    elseif ($policy
      ->hasDirective('default-src')) {
      $connectDirective = array_merge($policy
        ->getDirective('default-src'), [
        self::TRACKING_DOMAIN,
      ]);
      $policy
        ->setDirective('connect-src', $connectDirective);
    }
  }

}

Classes

Name	Description
CspSubscriber	Alter CSP policy for Google Analytics.