content_translation.module 38.5 KB
Newer Older
1 2 3 4 5 6 7
<?php

/**
 * @file
 * Allows entities to be translated into different languages.
 */

8
use Drupal\content_translation\Plugin\Derivative\ContentTranslationLocalTasks;
9
use Drupal\Core\Entity\ContentEntityInterface;
10 11
use Drupal\Core\Entity\EntityFormControllerInterface;
use Drupal\Core\Entity\EntityInterface;
12 13
use Drupal\Core\Entity\EntityTypeInterface;
use Drupal\Core\Field\FieldDefinition;
14 15 16
use Drupal\Core\Language\Language;
use Drupal\Core\Session\AccountInterface;
use Drupal\Core\TypedData\TranslatableInterface;
17
use Drupal\node\NodeInterface;
18 19 20 21

/**
 * Implements hook_help().
 */
22
function content_translation_help($path, $arg) {
23
  switch ($path) {
24
    case 'admin/help#content_translation':
25 26
      $output = '';
      $output .= '<h3>' . t('About') . '</h3>';
27
      $output .= '<p>' . t('The Content Translation module allows you to create and manage translations for your Drupal site content. You can specify which elements need to be translated at the content-type level for content items and comments, at the vocabulary level for taxonomy terms, and at the site level for user accounts. Other modules may provide additional elements that can be translated. For more information, see the online handbook entry for <a href="!url">Content Translation</a>.', array('!url' => 'http://drupal.org/documentation/modules/translation_entity')) . '</p>';
28 29 30
      $output .= '<h3>' . t('Uses') . '</h3>';
      $output .= '<dl>';
      $output .= '<dt>' . t('Enabling translation') . '</dt>';
31
      $output .= '<dd><p>' . t('Before you can translate content, there must be at least two languages added on the <a href="!url">languages administration</a> page.', array('!url' => url('admin/config/regional/language'))) . '</p>';
32
      $output .= '<p>' . t('After adding languages, <a href="!url">configure translation</a>.', array('!url' => url('admin/config/regional/content-language'))) . '</p>';
33
      $output .= '<dt>' . t('Translating content') . '</dt>';
34
      $output .= '<dd>' . t('After enabling translation you can create a new piece of content, or edit existing content and assign it a language. Then, you will see a <em>Translate</em> tab or link that will gives an overview of the translation status for the current content. From there, you can add translations and edit or delete existing translations. This process is similar for every translatable element on your site, such as taxonomy terms, comments or user accounts.') . '</dd>';
35 36 37 38 39
      $output .= '<dt>' . t('Changing source language') . '</dt>';
      $output .= '<dd>' . t('When there are two or more possible source languages, selecting a <em>Source language</em> will repopulate the form using the specified source\'s values. For example, French is much closer to Spanish than to Chinese, so changing the French translation\'s source language to Spanish can assist translators.') . '</dd>';
      $output .= '<dt>' . t('Maintaining translations') . '</dt>';
      $output .= '<dd>' . t('If editing content in one language requires that translated versions also be updated to reflect the change, use the <em>Flag other translations as outdated</em> check box to mark the translations as outdated and in need of revision.') . '</dd>';
      $output .= '<dt>' . t('Translation permissions') . '</dt>';
40
      $output .= '<dd>' . t('The Content Translation module makes a basic set of permissions available. Additional <a href="@permissions">permissions</a> are made available after translation is enabled for each translatable element.', array('@permissions' => url('admin/people/permissions', array('fragment' => 'module-content_translation')))) . '</dd>';
41 42
      $output .= '</dl>';
      return $output;
43 44 45

    case 'admin/config/regional/content-language':
      $output = '';
46
      if (!\Drupal::languageManager()->isMultilingual()) {
47
        $output .= '<br/>' . t('Before you can translate content, there must be at least two languages added on the <a href="!url">languages administration</a> page.', array('!url' => url('admin/config/regional/language')));
48 49
      }
      return $output;
50 51 52
  }
}

53 54 55
/**
 * Implements hook_module_implements_alter().
 */
56
function content_translation_module_implements_alter(&$implementations, $hook) {
57 58
  switch ($hook) {
    // Move some of our hook implementations to the end of the list.
59
    case 'entity_type_alter':
60 61 62
      $group = $implementations['content_translation'];
      unset($implementations['content_translation']);
      $implementations['content_translation'] = $group;
63 64 65 66
      break;
  }
}

67 68 69
/**
 * Implements hook_language_type_info_alter().
 */
70
function content_translation_language_types_info_alter(array &$language_types) {
71 72 73
  // Make content language negotiation configurable by removing the 'locked'
  // flag.
  $language_types[Language::TYPE_CONTENT]['locked'] = FALSE;
74
  unset($language_types[Language::TYPE_CONTENT]['fixed']);
75 76 77
}

/**
78
 * Implements hook_entity_type_alter().
79 80
 *
 * The content translation UI relies on the entity info to provide its features.
81
 * See the documentation of hook_entity_type_build() in the Entity API documentation
82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102
 * for more details on all the entity info keys that may be defined.
 *
 * To make Content Translation automatically support an entity type some keys
 * may need to be defined, but none of them is required unless the entity path
 * is different from the usual /ENTITY_TYPE/{ENTITY_TYPE} pattern (for instance
 * "/taxonomy/term/{taxonomy_term}"), in which case at least the 'canonical' key
 * in the 'links' entity info property must be defined.
 *
 * Every entity type needs a translation controller to be translated. This can
 * be specified through the 'translation' key in the 'controllers' entity info
 * property. If an entity type is translatable and no translation controller is
 * defined, \Drupal\content_translation\ContentTranslationController will be
 * assumed. Every translation controller class must implement
 * \Drupal\content_translation\ContentTranslationControllerInterface.
 *
 * If the entity paths match the default pattern above and there is no need for
 * an entity-specific translation controller class, Content Translation will
 * provide built-in support for the entity. However enabling translation for
 * each translatable bundle will be required.
 *
 * @see \Drupal\Core\Entity\Annotation\EntityType
103
 */
104
function content_translation_entity_type_alter(array &$entity_types) {
105
  // Provide defaults for translation info.
106 107 108 109 110
  /** @var $entity_types \Drupal\Core\Entity\EntityTypeInterface[] */
  foreach ($entity_types as $entity_type) {
    if ($entity_type->isTranslatable()) {
      if (!$entity_type->hasControllerClass('translation')) {
        $entity_type->setControllerClass('translation', 'Drupal\content_translation\ContentTranslationController');
111
      }
112

113
      $translation = $entity_type->get('translation');
114 115
      if (!$translation || !isset($translation['content_translation'])) {
        $translation['content_translation'] = array();
116
      }
117

118
      if ($entity_type->hasLinkTemplate('canonical')) {
119
        // Provide default route names for the translation paths.
120 121
        if (!$entity_type->hasLinkTemplate('drupal:content-translation-overview')) {
          $entity_type->setLinkTemplate('drupal:content-translation-overview', "content_translation.translation_overview_" . $entity_type->id());
122
        }
123 124
        // @todo Remove this as soon as menu access checks rely on the
        //   controller. See https://drupal.org/node/2155787.
125
        $translation['content_translation'] += array(
126
          'access_callback' => 'content_translation_translate_access',
127 128
        );
      }
129
      $entity_type->set('translation', $translation);
130
    }
131 132
  }
}
133

134 135 136
/**
 * Implements hook_entity_bundle_info_alter().
 */
137
function content_translation_entity_bundle_info_alter(&$bundles) {
138 139
  foreach ($bundles as $entity_type => &$info) {
    foreach ($info as $bundle => &$bundle_info) {
140
      $enabled = content_translation_get_config($entity_type, $bundle, 'enabled');
141
      $bundle_info['translatable'] = !empty($enabled);
142 143 144 145
    }
  }
}

146
/**
147
 * Implements hook_entity_base_field_info_alter().
148
 */
149 150
function content_translation_entity_base_field_info_alter(&$fields, EntityTypeInterface $entity_type) {
  $translation_settings = \Drupal::config('content_translation.settings')->get($entity_type->id());
151 152 153

  if ($translation_settings) {
    // Currently field translatability is defined per-field but we may want to
154 155 156
    // make it per-instance instead. In that case, we will need to implement
    // hook_bundle_field_info_alter() instead.
    $field_settings = array();
157
    foreach ($translation_settings as $bundle => $settings) {
158
      $field_settings += !empty($settings['content_translation']['fields']) ? $settings['content_translation']['fields'] : array();
159 160
    }

161 162 163
    foreach ($field_settings as $name => $translatable) {
      if (isset($fields[$name]) && $fields[$name] instanceof FieldDefinition) {
        $fields[$name]->setTranslatable((bool) $translatable);
164 165 166 167 168
      }
    }
  }
}

169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189
/**
 * Implements hook_field_info_alter().
 *
 * Content translation extends the @FieldType annotation with following key:
 * - column_groups: contains information about the field type properties
 *   which columns should be synchronized across different translations and
 *   which are translatable. This is useful for instance to translate the
 *   "alt" and "title" textual elements of an image field, while keeping the
 *   same image on every translation.
 *
 *   @see Drupal\image\Plugin\Field\FieldType\imageItem.
 */
function content_translation_field_info_alter(&$info) {
  foreach ($info as $key => $settings) {
    // Supply the column_groups key if it's not there.
    if (empty($settings['column_groups'])) {
      $info[$key]['column_groups'] = array();
    }
  }
}

190 191 192 193 194 195 196 197
/**
 * Implements hook_entity_operation_alter().
 */
function content_translation_entity_operation_alter(array &$operations, \Drupal\Core\Entity\EntityInterface $entity) {
  // @todo Use an access permission.
  if ($entity instanceof NodeInterface && $entity->isTranslatable()) {
    $operations['translate'] = array(
      'title' => t('Translate'),
198
    ) + $entity->urlInfo('drupal:content-translation-overview')->toArray();
199 200 201
  }
}

202 203 204 205 206
/**
 * Implements hook_menu_link_defaults_alter().
 */
function content_translation_menu_link_defaults_alter(array &$links) {
  // Clarify where translation settings are located.
207
  $links['language.content_settings_page']['title'] = 'Content language and translation';
208
  $links['language.content_settings_page']['description'] = 'Configure language and translation support for content.';
209 210
}

211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228
/**
 * Convert an entity canonical link to a router path.
 *
 * @param string $link
 *   The entity link to be converted.
 *
 * @return string
 *   The resulting router path. For instance "/node/{node}" is turned into
 *   "node/%node".
 *
 * @todo Remove this and use the actual link values when all the Content
 *   Translation code is adapted to the new routing system.
 */
function _content_translation_link_to_router_path($entity_type, $link) {
  $path = preg_replace('|{([^}]+)}|', '%$1', trim($link, '/'));
  return str_replace('%id', '%' . $entity_type, $path);
}

229 230 231 232 233 234 235 236 237
/**
 * Strips out menu loaders from the given path.
 *
 * @param string $path
 *   The path to process.
 *
 * @return
 *   The given path where all the menu loaders are replaced with "%".
 */
238
function _content_translation_menu_strip_loaders($path) {
239 240 241
  return preg_replace('|%[^/]+|', '%', $path);
}

242 243 244 245 246 247
/**
 * Access callback for the translation overview page.
 *
 * @param \Drupal\Core\Entity\EntityInterface $entity
 *   The entity whose translation overview should be displayed.
 */
248
function content_translation_translate_access(EntityInterface $entity) {
249
  return $entity instanceof ContentEntityInterface && empty($entity->getUntranslated()->language()->locked) && \Drupal::languageManager()->isMultilingual() && $entity->isTranslatable() &&
250
    (user_access('create content translations') || user_access('update content translations') || user_access('delete content translations'));
251 252
}

253 254 255 256 257 258 259
/**
 * Checks whether the given user can view the specified translation.
 *
 * @param \Drupal\Core\Entity\EntityInterface $entity
 *   The entity whose translation overview should be displayed.
 * @param $langcode
 *   The language code of the translation to be displayed.
260
 * @param \Drupal\Core\Session\AccountInterface $account
261 262 263
 *   (optional) The account for which view access should be checked. Defaults to
 *   the current user.
 */
264
function content_translation_view_access(EntityInterface $entity, $langcode, AccountInterface $account = NULL) {
265 266 267 268 269
  $entity_type_id = $entity->getEntityTypeId();
  $entity_type = $entity->getEntityType();
  $permission = "translate $entity_type_id";
  if ($entity_type->getPermissionGranularity() == 'bundle') {
    $permission = "translate {$entity->bundle()} $entity_type_id";
270 271
  }
  return !empty($entity->translation[$langcode]['status']) || user_access('translate any entity', $account) || user_access($permission, $account);
272 273
}

274 275 276 277 278 279
/**
 * Access callback for the translation addition page.
 *
 * @param \Drupal\Core\Entity\EntityInterface $entity
 *   The entity being translated.
 * @param \Drupal\Core\Language\Language $source
280 281
 *   (optional) The language of the values being translated. Defaults to the
 *   entity language.
282
 * @param \Drupal\Core\Language\Language $target
283 284
 *   (optional) The language of the translated values. Defaults to the current
 *   content language.
285
 */
286
function content_translation_add_access(EntityInterface $entity, Language $source = NULL, Language $target = NULL) {
287
  $source = !empty($source) ? $source : $entity->language();
288
  $target = !empty($target) ? $target : \Drupal::languageManager()->getCurrentLanguage(Language::TYPE_CONTENT);
289
  $translations = $entity->getTranslationLanguages();
290
  $languages = \Drupal::languageManager()->getLanguages();
291
  return $source->id != $target->id && isset($languages[$source->id]) && isset($languages[$target->id]) && !isset($translations[$target->id]) && content_translation_access($entity, 'create');
292 293 294 295 296 297 298 299 300 301 302
}

/**
 * Access callback for the translation edit page.
 *
 * @param \Drupal\Core\Entity\EntityInterface $entity
 *   The entity being translated.
 * @param \Drupal\Core\Language\Language $language
 *   (optional) The language of the translated values. Defaults to the current
 *   content language.
 */
303
function content_translation_edit_access(EntityInterface $entity, Language $language = NULL) {
304
  $language = !empty($language) ? $language : \Drupal::languageManager()->getCurrentLanguage(Language::TYPE_CONTENT);
305
  $translations = $entity->getTranslationLanguages();
306
  $languages = \Drupal::languageManager()->getLanguages();
307
  return isset($languages[$language->id]) && $language->id != $entity->getUntranslated()->language()->id && isset($translations[$language->id]) && content_translation_access($entity, 'update');
308 309 310 311 312 313 314 315 316 317 318
}

/**
 * Access callback for the translation delete page.
 *
 * @param \Drupal\Core\Entity\EntityInterface $entity
 *   The entity being translated.
 * @param \Drupal\Core\Language\Language $language
 *   (optional) The language of the translated values. Defaults to the current
 *   content language.
 */
319
function content_translation_delete_access(EntityInterface $entity, Language $language = NULL) {
320
  $language = !empty($language) ? $language : \Drupal::languageManager()->getCurrentLanguage(Language::TYPE_CONTENT);
321
  $translations = $entity->getTranslationLanguages();
322
  $languages = \Drupal::languageManager()->getLanguages();
323
  return isset($languages[$language->id]) && $language->id != $entity->getUntranslated()->language()->id && isset($translations[$language->id]) && content_translation_access($entity, 'delete');
324 325 326
}

/**
327
 * Returns the key name used to store the configuration setting.
328
 *
329 330
 * Based on the entity type and bundle, the keys used to store configuration
 * will have a common root name.
331 332 333 334 335 336 337 338 339
 *
 * @param string $entity_type
 *   The type of the entity the setting refers to.
 * @param string $bundle
 *   The bundle of the entity the setting refers to.
 * @param string $setting
 *   The name of the setting.
 *
 * @return string
340
 *   The key name of the configuration setting.
341 342 343 344
 *
 * @todo Generalize this logic so that it is available to any module needing
 *   per-bundle configuration.
 */
345
function content_translation_get_config_key($entity_type, $bundle, $setting) {
346 347
  $entity_type = preg_replace('/[^0-9a-zA-Z_]/', "_", $entity_type);
  $bundle = preg_replace('/[^0-9a-zA-Z_]/', "_", $bundle);
348
  return $entity_type . '.' . $bundle . '.content_translation.' . $setting;
349 350 351 352 353 354 355 356 357 358 359 360 361 362 363
}

/**
 * Retrieves the value for the specified setting.
 *
 * @param string $entity_type
 *   The type of the entity the setting refer to.
 * @param string $bundle
 *   The bundle of the entity the setting refer to.
 * @param string $setting
 *   The name of the setting.
 *
 * @returns mixed
 *   The stored value for the given setting.
 */
364 365
function content_translation_get_config($entity_type, $bundle, $setting) {
  $key = content_translation_get_config_key($entity_type, $bundle, $setting);
366
  return \Drupal::config('content_translation.settings')->get($key);
367 368 369 370 371 372 373 374 375 376 377 378 379 380
}

/**
 * Stores the given value for the specified setting.
 *
 * @param string $entity_type
 *   The type of the entity the setting refer to.
 * @param string $bundle
 *   The bundle of the entity the setting refer to.
 * @param string $setting
 *   The name of the setting.
 * @param $value
 *   The value to be stored for the given setting.
 */
381 382
function content_translation_set_config($entity_type, $bundle, $setting, $value) {
  $key = content_translation_get_config_key($entity_type, $bundle, $setting);
383
  return \Drupal::config('content_translation.settings')->set($key, $value)->save();
384 385 386 387 388 389 390 391 392 393 394 395 396 397
}

/**
 * Determines whether the given entity type is translatable.
 *
 * @param string $entity_type
 *   The type of the entity.
 * @param string $bundle
 *   (optional) The bundle of the entity. If no bundle is provided, all the
 *   available bundles are checked.
 *
 * @returns
 *   TRUE if the specified bundle is translatable. If no bundle is provided
 *   returns TRUE if at least one of the entity bundles is translatable.
398 399
 *
 * @todo Move to \Drupal\content_translation\ContentTranslationManager.
400
 */
401
function content_translation_enabled($entity_type, $bundle = NULL) {
402 403
  $enabled = FALSE;

404
  if (\Drupal::service('content_translation.manager')->isSupported($entity_type)) {
405 406
    $bundles = !empty($bundle) ? array($bundle) : array_keys(entity_get_bundles($entity_type));
    foreach ($bundles as $bundle) {
407
      if (content_translation_get_config($entity_type, $bundle, 'enabled')) {
408 409 410
        $enabled = TRUE;
        break;
      }
411 412 413
    }
  }

414
  return $enabled;
415 416 417
}

/**
418
 * Content translation controller factory.
419
 *
420
 * @param string $entity_type_id
421 422
 *   The type of the entity being translated.
 *
423 424
 * @return \Drupal\content_translation\ContentTranslationControllerInterface
 *   An instance of the content translation controller interface.
425 426
 *
 * @todo Move to \Drupal\content_translation\ContentTranslationManager.
427
 */
428 429
function content_translation_controller($entity_type_id) {
  $entity_type = \Drupal::entityManager()->getDefinition($entity_type_id);
430
  // @todo Throw an exception if the key is missing.
431 432
  $class = $entity_type->getControllerClass('translation');
  return new $class($entity_type);
433 434 435 436 437 438 439 440 441
}

/**
 * Returns the entity form controller for the given form.
 *
 * @param array $form_state
 *   The form state array holding the entity form controller.
 *
 * @return \Drupal\Core\Entity\EntityFormControllerInterface;
442
 *   An instance of the content translation form interface or FALSE if not an
443
 *   entity form.
444 445
 *
 * @todo Move to \Drupal\content_translation\ContentTranslationManager.
446
 */
447
function content_translation_form_controller(array $form_state) {
448 449 450 451
  return isset($form_state['controller']) && $form_state['controller'] instanceof EntityFormControllerInterface ? $form_state['controller'] : FALSE;
}

/**
452
 * Checks whether a content translation is accessible.
453 454 455
 *
 * @param \Drupal\Core\Entity\EntityInterface $entity
 *   The entity to be accessed.
456 457 458 459 460 461
 * @param $op
 *   The operation to be performed on the translation. Possible values are:
 *   - "view"
 *   - "update"
 *   - "delete"
 *   - "create"
462 463 464
 *
 * @return
 *   TRUE if the current user is allowed to view the translation.
465 466
 *
 * @todo Move to \Drupal\content_translation\ContentTranslationManager.
467
 */
468
function content_translation_access(EntityInterface $entity, $op) {
469
  return content_translation_controller($entity->getEntityTypeId())->getTranslationAccess($entity, $op) ;
470 471 472 473 474
}

/**
 * Implements hook_permission().
 */
475
function content_translation_permission() {
476
  $permission = array(
477
    'administer content translation' => array(
478
      'title' => t('Administer translation settings'),
479
      'description' => t('Configure translatability of entities and fields.'),
480
    ),
481
    'create content translations' => array(
482 483
      'title' => t('Create translations'),
    ),
484
    'update content translations' => array(
485 486
      'title' => t('Edit translations'),
    ),
487
    'delete content translations' => array(
488 489
      'title' => t('Delete translations'),
    ),
490 491 492 493 494
    'translate any entity' => array(
      'title' => t('Translate any entity'),
    ),
  );

495 496
  // Create a translate permission for each enabled entity type and (optionally)
  // bundle.
497 498 499
  foreach (\Drupal::entityManager()->getDefinitions() as $entity_type_id => $entity_type) {
    if ($permission_granularity = $entity_type->getPermissionGranularity()) {
      $t_args = array('@entity_label' => $entity_type->getLowercaseLabel());
500

501
      switch ($permission_granularity) {
502
        case 'bundle':
503 504
          foreach (entity_get_bundles($entity_type_id) as $bundle => $bundle_info) {
            if (content_translation_enabled($entity_type_id, $bundle)) {
505
              $t_args['%bundle_label'] = isset($bundle_info['label']) ? $bundle_info['label'] : $bundle;
506
              $permission["translate $bundle $entity_type_id"] = array(
507
                'title' => t('Translate %bundle_label @entity_label', $t_args),
508 509 510 511 512 513
              );
            }
          }
          break;

        case 'entity_type':
514 515
          if (content_translation_enabled($entity_type_id)) {
            $permission["translate $entity_type_id"] = array(
516 517 518 519 520
              'title' => t('Translate @entity_label', $t_args),
            );
          }
          break;
      }
521 522 523 524 525 526 527 528 529
    }
  }

  return $permission;
}

/**
 * Implements hook_form_alter().
 */
530
function content_translation_form_alter(array &$form, array &$form_state) {
531 532 533 534
  $form_controller = content_translation_form_controller($form_state);
  $entity = $form_controller ? $form_controller->getEntity() : NULL;

  if ($entity instanceof ContentEntityInterface && $entity->isTranslatable() && count($entity->getTranslationLanguages()) > 1) {
535
    $controller = content_translation_controller($entity->getEntityTypeId());
536 537 538 539 540 541 542 543 544 545
    $controller->entityFormAlter($form, $form_state, $entity);

    // @todo Move the following lines to the code generating the property form
    //   elements once we have an official #multilingual FAPI key.
    $translations = $entity->getTranslationLanguages();
    $form_langcode = $form_controller->getFormLangcode($form_state);

    // Handle fields shared between translations when there is at least one
    // translation available or a new one is being created.
    if (!$entity->isNew() && (!isset($translations[$form_langcode]) || count($translations) > 1)) {
546
      foreach ($entity->getFieldDefinitions() as $property_name => $definition) {
547
        if (isset($form[$property_name])) {
548
          $form[$property_name]['#multilingual'] = $definition->isTranslatable();
549 550 551 552 553 554 555
        }
      }
    }

  }
}

556
/**
557
 * Implements hook_language_fallback_candidates_OPERATION_alter().
558 559 560
 *
 * Performs language fallback for unaccessible translations.
 */
561 562 563 564 565
function content_translation_language_fallback_candidates_entity_view_alter(&$candidates, $context) {
  $entity = $context['data'];
  foreach ($entity->getTranslationLanguages() as $langcode => $language) {
    if (!content_translation_view_access($entity, $langcode)) {
      unset($candidates[$langcode]);
566 567 568 569
    }
  }
}

570 571 572
/**
 * Implements hook_entity_load().
 */
573
function content_translation_entity_load(array $entities, $entity_type) {
574 575
  $enabled_entities = array();

576
  if (content_translation_enabled($entity_type)) {
577
    foreach ($entities as $entity) {
578
      if ($entity instanceof ContentEntityInterface && $entity->isTranslatable()) {
579 580 581 582 583 584
        $enabled_entities[$entity->id()] = $entity;
      }
    }
  }

  if (!empty($enabled_entities)) {
585
    content_translation_load_translation_metadata($enabled_entities, $entity_type);
586 587 588 589 590 591 592 593 594 595 596
  }
}

/**
 * Loads translation data into the given entities.
 *
 * @param array $entities
 *   The entities keyed by entity ID.
 * @param string $entity_type
 *   The type of the entities.
 */
597 598
function content_translation_load_translation_metadata(array $entities, $entity_type) {
  $query = 'SELECT * FROM {content_translation} te WHERE te.entity_type = :entity_type AND te.entity_id IN (:entity_id)';
599
  $result = db_query($query, array(':entity_type' => $entity_type, ':entity_id' => array_keys($entities)));
600
  $exclude = array('entity_type', 'entity_id', 'langcode');
601 602 603
  foreach ($result as $record) {
    $entity = $entities[$record->entity_id];
    // @todo Declare these as entity (translation?) properties.
604 605
    foreach ($record as $field_name => $value) {
      if (!in_array($field_name, $exclude)) {
606 607 608 609 610
        $langcode = $record->langcode;
        $entity->translation[$langcode][$field_name] = $value;
        if (!$entity->hasTranslation($langcode)) {
          $entity->initTranslation($langcode);
        }
611 612
      }
    }
613 614 615 616 617 618
  }
}

/**
 * Implements hook_entity_insert().
 */
619
function content_translation_entity_insert(EntityInterface $entity) {
620
  // Only do something if translation support for the given entity is enabled.
621
  if (!($entity instanceof ContentEntityInterface) || !$entity->isTranslatable()) {
622 623 624
    return;
  }

625
  $fields = array('entity_type', 'entity_id', 'langcode', 'source', 'outdated', 'uid', 'status', 'created', 'changed');
626
  $query = db_insert('content_translation')->fields($fields);
627 628

  foreach ($entity->getTranslationLanguages() as $langcode => $language) {
629 630 631 632
    $translation = isset($entity->translation[$langcode]) ? $entity->translation[$langcode] : array();

    $translation += array(
      'source' => '',
633
      'uid' => \Drupal::currentUser()->id(),
634 635 636 637 638 639
      'outdated' => FALSE,
      'status' => TRUE,
      'created' => REQUEST_TIME,
      'changed' => REQUEST_TIME,
    );

640
    $translation['entity_type'] = $entity->getEntityTypeId();
641 642 643 644 645 646 647 648 649 650
    $translation['entity_id'] = $entity->id();
    $translation['langcode'] = $langcode;

    // Reorder values to match the schema.
    $values = array();
    foreach ($fields as $field_name) {
      $value = is_bool($translation[$field_name]) ? intval($translation[$field_name]) : $translation[$field_name];
      $values[$field_name] = $value;
    }
    $query->values($values);
651 652 653 654 655 656 657 658
  }

  $query->execute();
}

/**
 * Implements hook_entity_delete().
 */
659
function content_translation_entity_delete(EntityInterface $entity) {
660
  // Only do something if translation support for the given entity is enabled.
661
  if (!($entity instanceof ContentEntityInterface) || !$entity->isTranslatable()) {
662 663 664
    return;
  }

665
  db_delete('content_translation')
666
    ->condition('entity_type', $entity->getEntityTypeId())
667 668 669 670 671 672 673
    ->condition('entity_id', $entity->id())
    ->execute();
}

/**
 * Implements hook_entity_update().
 */
674
function content_translation_entity_update(EntityInterface $entity) {
675
  // Only do something if translation support for the given entity is enabled.
676
  if (!($entity instanceof ContentEntityInterface) || !$entity->isTranslatable()) {
677 678 679
    return;
  }

680
  // Delete and create to ensure no stale value remains behind.
681 682
  content_translation_entity_delete($entity);
  content_translation_entity_insert($entity);
683 684 685
}

/**
686
 * Implements hook_entity_extra_field_info().
687
 */
688
function content_translation_entity_extra_field_info() {
689 690
  $extra = array();

691
  foreach (\Drupal::entityManager()->getDefinitions() as $entity_type => $info) {
692
    foreach (entity_get_bundles($entity_type) as $bundle => $bundle_info) {
693
      if (content_translation_enabled($entity_type, $bundle)) {
694 695 696 697 698 699 700 701 702 703 704 705 706
        $extra[$entity_type][$bundle]['form']['translation'] = array(
          'label' => t('Translation'),
          'description' => t('Translation settings'),
          'weight' => 10,
        );
      }
    }
  }

  return $extra;
}

/**
707
 * Implements hook_form_FORM_ID_alter() for 'field_ui_field_edit_form'.
708
 */
709
function content_translation_form_field_ui_field_edit_form_alter(array &$form, array &$form_state, $form_id) {
710 711 712
  $field = $form['#field'];
  $bundle = $form['#bundle'];
  $bundle_is_translatable = content_translation_enabled($field->entity_type, $bundle);
713 714 715
  $form['field']['translatable'] = array(
    '#type' => 'checkbox',
    '#title' => t('Users may translate this field.'),
716
    '#default_value' => $field->isTranslatable(),
717
    '#weight' => 20,
718
    '#disabled' => !$bundle_is_translatable,
719
  );
720
  $form['#submit'][] = 'content_translation_form_field_ui_field_edit_form_submit';
721 722 723 724 725 726 727 728 729 730

  // Provide helpful pointers for administrators.
  if (\Drupal::currentUser()->hasPermission('administer content translation') &&  !$bundle_is_translatable) {
    $toggle_url = url('admin/config/regional/content-language', array(
      'query' => drupal_get_destination(),
    ));
    $form['field']['translatable']['#description'] = t('To enable translation of this field, <a href="@language-settings-url">enable language support</a> for this type.', array(
      '@language-settings-url' => $toggle_url,
    ));
  }
731 732 733 734 735 736 737 738 739 740 741
}

/**
 * Form submission handler for 'field_ui_field_edit_form'.
 */
function content_translation_form_field_ui_field_edit_form_submit($form, array &$form_state) {
  $instance = $form_state['instance'];
  $value = content_translation_get_config($instance->entity_type, $instance->bundle, 'fields');
  if (!isset($value)) {
    $value = array();
  }
742
  $value[$instance->getField()->getName()] = $form_state['values']['field']['translatable'];
743 744 745 746 747
  // Store the same value for all bundles as translatability is tracked per
  // field.
  foreach (entity_get_bundles($instance->entity_type) as $bundle => $info) {
    content_translation_set_config($instance->entity_type, $bundle, 'fields', $value);
  }
748 749
}

750
/**
751
 * Implements hook_form_FORM_ID_alter() for 'field_ui_field_instance_edit_form'.
752
 */
753
function content_translation_form_field_ui_field_instance_edit_form_alter(array &$form, array &$form_state, $form_id) {
754
  if ($form['#field']->isTranslatable()) {
755
    module_load_include('inc', 'content_translation', 'content_translation.admin');
756
    $element = content_translation_field_sync_widget($form['#field']);
757 758 759 760 761 762 763
    if ($element) {
      $form['instance']['settings']['translation_sync'] = $element;
    }
  }
}

/**
764
 * Implements hook_entity_presave().
765
 */
766
function content_translation_entity_presave(EntityInterface $entity) {
767 768 769 770 771 772 773 774 775 776
  // By default no column has to be synchronized.
  // @todo Replace with own storage in https://drupal.org/node/2224761
  if ($entity->getEntityTypeId() === 'field_config') {
    $entity->settings += array('translation_sync' => FALSE);
  }
  // Synchronization can be enabled per instance.
  // @todo Replace with own storage in https://drupal.org/node/2224761
  if ($entity->getEntityTypeId() === 'field_instance_config') {
    $entity->settings += array('translation_sync' => FALSE);
  }
777
  if ($entity instanceof ContentEntityInterface && $entity->isTranslatable()) {
778 779
    // @todo Avoid using request attributes once translation metadata become
    //   regular fields.
780 781
    $attributes = \Drupal::request()->attributes;
    \Drupal::service('content_translation.synchronizer')->synchronizeFields($entity, $entity->language()->id, $attributes->get('source_langcode'));
782 783 784
  }
}

785 786 787
/**
 * Implements hook_element_info_alter().
 */
788
function content_translation_element_info_alter(&$type) {
789
  if (isset($type['language_configuration'])) {
790
    $type['language_configuration']['#process'][] = 'content_translation_language_configuration_element_process';
791 792
  }
}
793

794
/**
795
 * Returns a widget to enable content translation per entity bundle.
796 797 798 799 800 801 802 803 804 805 806 807 808 809 810
 *
 * Backward compatibility layer to support entities not using the language
 * configuration form element.
 *
 * @todo Remove once all core entities have language configuration.
 *
 * @param string $entity_type
 *   The type of the entity being configured for translation.
 * @param string $bundle
 *   The bundle of the entity being configured for translation.
 * @param array $form
 *   The configuration form array.
 * @param array $form_state
 *   The configuration form state array.
 */
811 812
function content_translation_enable_widget($entity_type, $bundle, array &$form, array &$form_state) {
  $key = $form_state['content_translation']['key'];
813 814 815 816
  if (!isset($form_state['language'][$key])) {
    $form_state['language'][$key] = array();
  }
  $form_state['language'][$key] += array('entity_type' => $entity_type, 'bundle' => $bundle);
817 818
  $element = content_translation_language_configuration_element_process(array('#name' => $key), $form_state, $form);
  unset($element['content_translation']['#element_validate']);
819 820 821 822 823 824 825 826 827 828 829 830
  return $element;
}

/**
 * Process callback: Expands the language_configuration form element.
 *
 * @param array $element
 *   Form API element.
 *
 * @return
 *   Processed language configuration element.
 */
831 832 833
function content_translation_language_configuration_element_process(array $element, array &$form_state, array &$form) {
  if (empty($element['#content_translation_skip_alter']) && user_access('administer content translation')) {
    $form_state['content_translation']['key'] = $element['#name'];
834
    $context = $form_state['language'][$element['#name']];
835

836
    $element['content_translation'] = array(
837 838
      '#type' => 'checkbox',
      '#title' => t('Enable translation'),
839 840
      '#default_value' => content_translation_enabled($context['entity_type'], $context['bundle']),
      '#element_validate' => array('content_translation_language_configuration_element_validate'),
841 842
      '#prefix' => '<label>' . t('Translation') . '</label>',
    );
843

844
    $form['actions']['submit']['#submit'][] = 'content_translation_language_configuration_element_submit';
845
  }
846 847 848 849
  return $element;
}

/**
850
 * Form validation handler for element added with content_translation_language_configuration_element_process().
851 852 853 854 855
 *
 * Checks whether translation can be enabled: if language is set to one of the
 * special languages and language selector is not hidden, translation cannot be
 * enabled.
 *
856
 * @see content_translation_language_configuration_element_submit()
857
 */
858 859
function content_translation_language_configuration_element_validate($element, array &$form_state, array $form) {
  $key = $form_state['content_translation']['key'];
860
  $values = $form_state['values'][$key];
861
  if (!$values['language_show'] && $values['content_translation'] && \Drupal::languageManager()->isLanguageLocked($values['langcode'])) {
862
    foreach (\Drupal::languageManager()->getLanguages(Language::STATE_LOCKED) as $language) {
863 864 865 866 867
      $locked_languages[] = $language->name;
    }
    // @todo Set the correct form element name as soon as the element parents
    //   are correctly set. We should be using NestedArray::getValue() but for
    //   now we cannot.
868
    form_set_error('', $form_state, t('"Show language selector" is not compatible with translating content that has default language: %choice. Either do not hide the language selector or pick a specific language.', array('%choice' => $locked_languages[$values['langcode']])));
869 870 871 872
  }
}

/**
873
 * Form submission handler for element added with content_translation_language_configuration_element_process().
874
 *
875
 * Stores the content translation settings.
876
 *
877
 * @see content_translation_language_configuration_element_validate()
878
 */
879 880
function content_translation_language_configuration_element_submit(array $form, array &$form_state) {
  $key = $form_state['content_translation']['key'];
881
  $context = $form_state['language'][$key];
882
  $enabled = $form_state['values'][$key]['content_translation'];
883

884 885
  if (content_translation_enabled($context['entity_type'], $context['bundle']) != $enabled) {
    content_translation_set_config($context['entity_type'], $context['bundle'], 'enabled', $enabled);
886
    entity_info_cache_clear();
887
    \Drupal::service('router.builder')->setRebuildNeeded();
888 889
  }
}
890 891 892 893

/**
 * Implements hook_form_FORM_ID_alter() for language_content_settings_form().
 */
894 895 896
function content_translation_form_language_content_settings_form_alter(array &$form, array &$form_state) {
  module_load_include('inc', 'content_translation', 'content_translation.admin');
  _content_translation_form_language_content_settings_form_alter($form, $form_state);
897 898
}

899 900 901
/**
 * Implements hook_preprocess_HOOK() for theme_language_content_settings_table().
 */
902 903 904
function content_translation_preprocess_language_content_settings_table(&$variables) {
  module_load_include('inc', 'content_translation', 'content_translation.admin');
  _content_translation_preprocess_language_content_settings_table($variables);
905 906
}

907
/**
908
 * Stores content translation settings.
909 910 911 912 913 914 915 916 917
 *
 * @param array $settings
 *   An associative array of settings keyed by entity type and bundle. At bundle
 *   level the following keys are available:
 *   - translatable: The bundle translatability status, which is a bool.
 *   - settings: An array of language configuration settings as defined by
 *     language_save_default_configuration().
 *   - fields: An associative array with field names as keys and a boolean as
 *     value, indicating field translatability.
918 919
 *   - columns: An associative array of translation synchronization settings
 *     keyed by field names.
920
 */
921
function content_translation_save_settings($settings) {
922 923
  foreach ($settings as $entity_type => $entity_settings) {
    foreach ($entity_settings as $bundle => $bundle_settings) {
924 925 926
      // The 'translatable' value is set only if it is possible to enable.
      if (isset($bundle_settings['translatable'])) {
        // Store whether a bundle has translation enabled or not.
927
        content_translation_set_config($entity_type, $bundle, 'enabled', $bundle_settings['translatable']);
928

929 930 931 932 933
        // Store whether fields are translatable or not.
        if (!empty($bundle_settings['fields'])) {
          content_translation_set_config($entity_type, $bundle, 'fields', $bundle_settings['fields']);
        }