silverback_preview_link.module

<?php

use Drupal\Core\Access\AccessResult;
use Drupal\Core\Access\AccessResultInterface;
use Drupal\Core\Field\FieldDefinitionInterface;
use Drupal\Core\Field\FieldItemListInterface;
use Drupal\Core\Session\AccountInterface;
use Drupal\silverback_preview_link\PreviewLinkHooks;
use Drupal\silverback_preview_link\PreviewLinkUtility;
use Drupal\silverback_preview_link\Routing\PreviewLinkRouteProvider;

/**
 * Implements hook_entity_type_alter().
 */
function silverback_preview_link_entity_type_alter(array &$entity_types): void {
  $supported_entity_types = array_filter(
    $entity_types,
    [PreviewLinkUtility::class, 'isEntityTypeSupported'],
  );

  /** @var \Drupal\Core\Entity\ContentEntityType $type */
  foreach ($supported_entity_types as $type) {
    $providers = $type->getRouteProviderClasses() ?: [];
    if (count($providers['silverback_preview_link'] ?? []) === 0) {
      $providers['silverback_preview_link'] = PreviewLinkRouteProvider::class;
      $type->setHandlerClass('route_provider', $providers);
    }

    if (!$type->hasLinkTemplate('preview-link-generate')) {
      $type->setLinkTemplate('preview-link-generate', $type->getLinkTemplate('canonical') . '/generate-preview-link');
    }
  }
}

/**
 * Implements hook_cron().
 */
function silverback_preview_link_cron(): void {
  \Drupal::classResolver(PreviewLinkHooks::class)->cron();
}

/**
 * Implements hook_theme().
 */
function silverback_preview_link_theme(array $existing, string $type, string $theme, string $path): array {
  return [
    'preview_link' => [
      'path' => $path . '/templates',
      'template' => 'preview-link',
      'variables' => [
        'title' => NULL,
        'preview_link_has_expired' => FALSE,
        'preview_url' => NULL,
        'preview_qr_code_url' => NULL,
        'preview_qr_code_fallback' => NULL,
        'expiry_description' => NULL,
        'actions_description' => NULL,
        'display_gif' => FALSE,
      ],
    ],
  ];
}

/**
 * Implements hook_entity_field_access().
 */
function silverback_preview_link_entity_field_access(string $operation, FieldDefinitionInterface $field_definition, AccountInterface $account, FieldItemListInterface $items = NULL): AccessResultInterface {
  $storageDefinition = $field_definition->getFieldStorageDefinition();
  if ($storageDefinition->getTargetEntityTypeId() !== 'silverback_preview_link') {
    return AccessResult::neutral();
  }

  if ($storageDefinition->getName() === 'entities' && $operation === 'edit') {
    return AccessResult::forbiddenIf(\Drupal::configFactory()->get('silverback_preview_link.settings')->get('multiple_entities') !== TRUE)
      ->addCacheTags(['config:preview_link.settings']);
  }

  return AccessResult::neutral();
}