<?php

/**
 * @file
 * Materio Mailjet: webhook support and simplenews-to-Mailjet list sync.
 */

use Drupal\simplenews\Entity\Subscriber;

/**
 * Invoked if a subscriber is subscribed to a newsletter.
 *
 * Pushes the subscription to every Mailjet list mapped to the newsletter
 * in materio_mailjet.settings.
 */
function materio_mailjet_simplenews_subscribe(Subscriber $subscriber, string $subscription) {
  \Drupal::service('materio_mailjet.sync')->subscribeToNewsletter($subscription, (string) $subscriber->getMail());
}

/**
 * Invoked if a subscriber is unsubscribed from a newsletter.
 *
 * Removes the subscription from every Mailjet list mapped to the newsletter.
 */
function materio_mailjet_simplenews_unsubscribe(Subscriber $subscriber, string $subscription) {
  \Drupal::service('materio_mailjet.sync')->unsubscribeFromNewsletter($subscription, (string) $subscriber->getMail());
}

/**
 * Act after a subscriber is updated.
 *
 * When the email changes, the old email is removed from the mapped lists
 * and the new one is added.
 */
function materio_mailjet_simplenews_subscriber_update(Subscriber $subscriber) {
  $new_mail = $subscriber->getMail();
  $original_mail = $subscriber->original->getMail();
  if ($new_mail === $original_mail) {
    return;
  }

  $new_subscriptions = $subscriber->getSubscribedNewsletterIds();
  $original_subscriptions = $subscriber->original->getSubscribedNewsletterIds();
  $sync = \Drupal::service('materio_mailjet.sync');

  $mapping = \Drupal::config('materio_mailjet.settings')->get('list_mapping') ?? [];
  foreach ($mapping as $list_id => $newsletter_id) {
    if (in_array($newsletter_id, $original_subscriptions)) {
      $sync->unsubscribeFromList((string) $list_id, (string) $original_mail);
    }
    if (in_array($newsletter_id, $new_subscriptions)) {
      $sync->subscribeToList((string) $list_id, (string) $new_mail);
    }
  }
}

/**
 * Act after a subscriber has been deleted.
 *
 * Removes the email from every mapped Mailjet list.
 */
function materio_mailjet_simplenews_subscriber_delete(Subscriber $subscriber) {
  \Drupal::service('materio_mailjet.sync')->unsubscribeFromAllLists((string) $subscriber->getMail());
}