courier.module

<?php

use Drupal\Core\Entity\EntityInterface;
use Drupal\courier\Entity\TemplateCollection;
use Drupal\courier\ChannelInterface;
use Drupal\Core\Entity\ContentEntityInterface;

/**
 * Implements hook_entity_insert().
 *
 * @see _courier_entity_postsave()
 */
function courier_entity_insert(EntityInterface $entity) {
  _courier_entity_postsave($entity);
}

/**
 * Implements hook_entity_update().
 *
 * @see _courier_entity_postsave()
 */
function courier_entity_update(EntityInterface $entity) {
  _courier_entity_postsave($entity);
}

/**
 * Respond to saving entities after they have been written to storage.
 */
function _courier_entity_postsave(EntityInterface $entity) {
  if ($entity instanceof ChannelInterface) {
    /** @var \Drupal\courier\Service\GlobalTemplateCollectionManagerInterface $template_collection_manager */
    $template_collection_manager = \Drupal::service('courier.manager.global_template_collection');
    $template_collection_manager->notifyTemplateChanged($entity);
  }
}

/**
 * Implements hook_entity_load().
 */
function courier_entity_load($entities, $entity_type) {
  if (!reset($entities) instanceof ChannelInterface) {
    return;
  }

  /** @var \Drupal\courier\Service\GlobalTemplateCollectionManagerInterface $template_collection_manager */
  $template_collection_manager = \Drupal::service('courier.manager.global_template_collection');
  foreach ($entities as $entity) {
    $template_collection_manager
      ->importFromGlobalCollection($entity);
  }
}

/**
 * Implements hook_entity_predelete().
 */
function courier_entity_predelete(EntityInterface $entity) {
  // Remove references from TemplateCollection when a Channel entity is deleted.
  if ($entity instanceof ChannelInterface) {
    if ($collection = TemplateCollection::getTemplateCollectionForTemplate($entity)) {
      $collection
        ->removeTemplate($entity->getEntityTypeId())
        ->save();
    }
  }

  // Postgres has strict type checks.
  // See https://github.com/dpi/rng/issues/50
  if (!$entity instanceof ContentEntityInterface) {
    return;
  }

  // Remove template collections if owner entity is deleted.
  $template_collection_storage = \Drupal::entityManager()
    ->getStorage('courier_template_collection');
  $query = $template_collection_storage->getQuery();
  $group = $query->andConditionGroup()
    ->condition('owner__target_type', $entity->getEntityTypeId(), '=')
    ->condition('owner__target_id', $entity->id(), '=');
  $query->condition($group);
  if ($ids = $query->execute()) {
    $template_collection_storage->delete($template_collection_storage->loadMultiple($ids));
  }
}