preview_link.module in Preview Link 8

Module file.

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preview_link.module

<?php

/**
 * @file
 * Module file.
 */
use Drupal\Core\Access\AccessResult;
use Drupal\Core\Entity\ContentEntityInterface;
use Drupal\Core\Entity\EntityInterface;
use Drupal\Core\Entity\EntityTypeInterface;
use Drupal\Core\Session\AccountInterface;
use Drupal\preview_link\PreviewLinkHooks;
use Drupal\preview_link\Routing\PreviewLinkRouteProvider;

/**
 * Implements hook_entity_type_alter().
 */
function preview_link_entity_type_alter(array &$entity_types) {
  $supported_entity_types = array_filter($entity_types, function (EntityTypeInterface $type) use ($entity_types) {
    return $type
      ->isRevisionable();
  });

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

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

/**
 * Implements hook_theme().
 */
function preview_link_theme($existing, $type, $theme, $path) {
  return [
    'preview_link' => [
      'path' => $path . '/templates',
      'template' => 'preview-link',
      'variables' => [
        'title' => NULL,
        'link' => NULL,
        'description' => NULL,
        'remaining_lifetime' => NULL,
      ],
    ],
  ];
}

/**
 * Implements hook_entity_access().
 */
function preview_link_entity_access(EntityInterface $entity, $operation, AccountInterface $account) {
  $neutral = AccessResult::neutral()
    ->addCacheableDependency($entity)
    ->addCacheContexts([
    'preview_link_route',
  ]);
  if ($operation !== 'view' || !$entity instanceof ContentEntityInterface) {
    return $neutral;
  }
  return \Drupal::service('access_check.preview_link')
    ->access($entity, \Drupal::routeMatch()
    ->getParameter('preview_token'));
}

Functions

Name	Description
preview_link_cron	Implements hook_cron().
preview_link_entity_access	Implements hook_entity_access().
preview_link_entity_type_alter	Implements hook_entity_type_alter().
preview_link_theme	Implements hook_theme().