content_translation.module 41.7 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 14
use Drupal\Core\Language\Language;
use Drupal\Core\Session\AccountInterface;
use Drupal\Core\TypedData\TranslatableInterface;
15
use Drupal\node\NodeInterface;
16 17 18 19

/**
 * Implements hook_help().
 */
20
function content_translation_help($path, $arg) {
21
  switch ($path) {
22
    case 'admin/help#content_translation':
23 24
      $output = '';
      $output .= '<h3>' . t('About') . '</h3>';
25
      $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>';
26 27 28
      $output .= '<h3>' . t('Uses') . '</h3>';
      $output .= '<dl>';
      $output .= '<dt>' . t('Enabling translation') . '</dt>';
29
      $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>';
30
      $output .= '<p>' . t('After adding languages, <a href="!url">configure translation</a>.', array('!url' => url('admin/config/regional/content-language'))) . '</p>';
31
      $output .= '<dt>' . t('Translating content') . '</dt>';
32
      $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>';
33 34 35 36 37
      $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>';
38
      $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>';
39 40
      $output .= '</dl>';
      return $output;
41 42 43

    case 'admin/config/regional/content-language':
      $output = '';
44
      if (!\Drupal::languageManager()->isMultilingual()) {
45
        $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')));
46 47
      }
      return $output;
48 49 50
  }
}

51 52 53
/**
 * Implements hook_module_implements_alter().
 */
54
function content_translation_module_implements_alter(&$implementations, $hook) {
55 56 57
  switch ($hook) {
    // Move some of our hook implementations to the end of the list.
    case 'menu_alter':
58
    case 'entity_type_alter':
59 60 61
      $group = $implementations['content_translation'];
      unset($implementations['content_translation']);
      $implementations['content_translation'] = $group;
62 63 64 65
      break;
  }
}

66 67 68
/**
 * Implements hook_language_type_info_alter().
 */
69
function content_translation_language_types_info_alter(array &$language_types) {
70 71 72
  // Make content language negotiation configurable by removing the 'locked'
  // flag.
  $language_types[Language::TYPE_CONTENT]['locked'] = FALSE;
73
  unset($language_types[Language::TYPE_CONTENT]['fixed']);
74 75 76
}

/**
77
 * Implements hook_entity_type_alter().
78 79
 *
 * The content translation UI relies on the entity info to provide its features.
80
 * See the documentation of hook_entity_type_build() in the Entity API documentation
81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101
 * 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
102
 */
103
function content_translation_entity_type_alter(array &$entity_types) {
104
  // Provide defaults for translation info.
105 106 107 108 109
  /** @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');
110
      }
111

112
      $translation = $entity_type->get('translation');
113 114
      if (!$translation || !isset($translation['content_translation'])) {
        $translation['content_translation'] = array();
115
      }
116

117
      if ($entity_type->hasLinkTemplate('canonical')) {
118
        // Provide default route names for the translation paths.
119 120
        if (!$entity_type->hasLinkTemplate('drupal:content-translation-overview')) {
          $entity_type->setLinkTemplate('drupal:content-translation-overview', "content_translation.translation_overview_" . $entity_type->id());
121
        }
122 123
        // @todo Remove this as soon as menu access checks rely on the
        //   controller. See https://drupal.org/node/2155787.
124
        $translation['content_translation'] += array(
125
          'access_callback' => 'content_translation_translate_access',
126 127
        );
      }
128
      $entity_type->set('translation', $translation);
129
    }
130 131
  }
}
132

133 134 135
/**
 * Implements hook_entity_bundle_info_alter().
 */
136
function content_translation_entity_bundle_info_alter(&$bundles) {
137 138
  foreach ($bundles as $entity_type => &$info) {
    foreach ($info as $bundle => &$bundle_info) {
139
      $enabled = content_translation_get_config($entity_type, $bundle, 'enabled');
140
      $bundle_info['translatable'] = !empty($enabled);
141 142 143 144
    }
  }
}

145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163
/**
 * Implements hook_entity_field_info_alter().
 */
function content_translation_entity_field_info_alter(&$info, $entity_type) {
  $translation_settings = config('content_translation.settings')->get($entity_type);

  if ($translation_settings) {
    // Currently field translatability is defined per-field but we may want to
    // make it per-instance instead, so leaving the possibility open for further
    // easier refactoring.
    $fields = array();
    foreach ($translation_settings as $bundle => $settings) {
      $fields += !empty($settings['content_translation']['fields']) ? $settings['content_translation']['fields'] : array();
    }

    $keys = array('definitions', 'optional');
    foreach ($fields as $name => $translatable) {
      foreach ($keys as $key) {
        if (isset($info[$key][$name])) {
164
          $info[$key][$name]->setTranslatable((bool) $translatable);
165 166 167 168 169 170 171
          break;
        }
      }
    }
  }
}

172 173 174 175 176 177 178 179
/**
 * 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'),
180
    ) + $entity->urlInfo('drupal:content-translation-overview');
181 182 183
  }
}

184 185
/**
 * Implements hook_menu().
186 187 188
 *
 * @todo Split this into route definition and menu link definition. See
 *   https://drupal.org/node/1987882 and https://drupal.org/node/2047633.
189
 */
190
function content_translation_menu() {
191 192 193
  $items = array();

  // Create tabs for all possible entity types.
194
  foreach (\Drupal::entityManager()->getDefinitions() as $entity_type_id => $entity_type) {
195
    // Provide the translation UI only for enabled types.
196 197
    if (content_translation_enabled($entity_type_id)) {
      $path = _content_translation_link_to_router_path($entity_type_id, $entity_type->getLinkTemplate('canonical'));
198
      $entity_position = count(explode('/', $path)) - 1;
199
      $keys = array_flip(array('load_arguments'));
200
      $translation = $entity_type->get('translation');
201
      $menu_info = array_intersect_key($translation['content_translation'], $keys) + array('file' => 'content_translation.pages.inc');
202 203 204 205 206 207 208 209 210 211 212 213 214
      $item = array();

      // Plugin annotations cannot contain spaces, thus we need to restore them
      // from underscores.
      foreach ($menu_info as $key => $value) {
        $item[str_replace('_', ' ', $key)] = $value;
      }

      // Add translation callback.
      // @todo Add the access callback instead of replacing it as soon as the
      // routing system supports multiple callbacks.
      $language_position = $entity_position + 3;
      $args = array($entity_position, $language_position, $language_position + 1);
215
      $items["$path/translations/add/%language/%language"] = array(
216
        'title' => 'Add',
217
        'route_name' => "content_translation.translation_add_$entity_type_id",
218
        'weight' => 1,
219
      );
220 221 222 223 224

      // Edit translation callback.
      $args = array($entity_position, $language_position);
      $items["$path/translations/edit/%language"] = array(
        'title' => 'Edit',
225
        'route_name' => "content_translation.translation_edit_$entity_type_id",
226
        'weight' => 1,
227
      );
228 229 230 231

      // Delete translation callback.
      $items["$path/translations/delete/%language"] = array(
        'title' => 'Delete',
232
        'route_name' => "content_translation.delete_$entity_type_id",
233 234 235 236 237 238 239 240 241
      ) + $item;
    }
  }

  return $items;
}

/**
 * Implements hook_menu_alter().
242 243 244
 *
 * @todo Split this into route definition and menu link definition. See
 *   https://drupal.org/node/1987882 and https://drupal.org/node/2047633.
245
 */
246
function content_translation_menu_alter(array &$items) {
247
  // Check that the declared menu base paths are actually valid.
248 249 250
  foreach (\Drupal::entityManager()->getDefinitions() as $entity_type_id => $entity_type) {
    if (content_translation_enabled($entity_type_id)) {
      $path = _content_translation_link_to_router_path($entity_type_id, $entity_type->getLinkTemplate('canonical'));
251

252 253 254 255
      // If the base path is not defined we cannot provide the translation UI
      // for this entity type. In some cases the actual base path might not have
      // a menu loader associated, hence we need to check also for the plain "%"
      // variant. See for instance comment_menu().
256
      if (!isset($items[$path]) && !isset($items["$path/edit"])
257
          && !isset($items[_content_translation_menu_strip_loaders($path)])) {
258 259
        unset(
          $items["$path/translations"],
260
          $items["$path/translations/add/%language/%language"],
261 262
          $items["$path/translations/delete/%language"]
        );
263
        $t_args = array('@entity_type' => $entity_type->getLabel() ?: $entity_type_id);
264
        watchdog('content translation', 'The entities of type @entity_type do not define a valid base path: it will not be possible to translate them.', $t_args, WATCHDOG_WARNING);
265 266
      }
      else {
267
        $edit_path = $path . '/edit';
268 269 270 271 272 273 274 275 276 277 278

        if (isset($items[$edit_path])) {
          // If the edit path is a default local task we need to find the parent
          // item.
          $edit_path_split = explode('/', $edit_path);
          do {
            $entity_form_item = &$items[implode('/', $edit_path_split)];
            array_pop($edit_path_split);
          }
          while (!empty($entity_form_item['type']) && $entity_form_item['type'] == MENU_DEFAULT_LOCAL_TASK);

279
          // Make the "Translate" tab follow the "Edit" one when possible.
280 281 282 283 284 285 286 287 288
          if (isset($entity_form_item['weight'])) {
            $items["$path/translations"]['weight'] = $entity_form_item['weight'] + 0.01;
          }
        }
      }
    }
  }
}

289 290 291 292 293
/**
 * Implements hook_menu_link_defaults_alter().
 */
function content_translation_menu_link_defaults_alter(array &$links) {
  // Clarify where translation settings are located.
294 295
  $links['language.admin.language.content_settings_page']['link_title'] = 'Content language and translation';
  $links['language.admin.language.content_settings_page']['description'] = 'Configure language and translation support for content.';
296 297
}

298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315
/**
 * 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);
}

316 317 318 319 320 321 322 323 324
/**
 * Strips out menu loaders from the given path.
 *
 * @param string $path
 *   The path to process.
 *
 * @return
 *   The given path where all the menu loaders are replaced with "%".
 */
325
function _content_translation_menu_strip_loaders($path) {
326 327 328
  return preg_replace('|%[^/]+|', '%', $path);
}

329 330 331 332 333 334
/**
 * Access callback for the translation overview page.
 *
 * @param \Drupal\Core\Entity\EntityInterface $entity
 *   The entity whose translation overview should be displayed.
 */
335
function content_translation_translate_access(EntityInterface $entity) {
336
  return $entity instanceof ContentEntityInterface && empty($entity->getUntranslated()->language()->locked) && \Drupal::languageManager()->isMultilingual() && $entity->isTranslatable() &&
337
    (user_access('create content translations') || user_access('update content translations') || user_access('delete content translations'));
338 339
}

340 341 342 343 344 345 346
/**
 * 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.
347
 * @param \Drupal\Core\Session\AccountInterface $account
348 349 350
 *   (optional) The account for which view access should be checked. Defaults to
 *   the current user.
 */
351
function content_translation_view_access(EntityInterface $entity, $langcode, AccountInterface $account = NULL) {
352 353 354 355 356
  $entity_type_id = $entity->getEntityTypeId();
  $entity_type = $entity->getEntityType();
  $permission = "translate $entity_type_id";
  if ($entity_type->getPermissionGranularity() == 'bundle') {
    $permission = "translate {$entity->bundle()} $entity_type_id";
357 358
  }
  return !empty($entity->translation[$langcode]['status']) || user_access('translate any entity', $account) || user_access($permission, $account);
359 360
}

361 362 363 364 365 366
/**
 * Access callback for the translation addition page.
 *
 * @param \Drupal\Core\Entity\EntityInterface $entity
 *   The entity being translated.
 * @param \Drupal\Core\Language\Language $source
367 368
 *   (optional) The language of the values being translated. Defaults to the
 *   entity language.
369
 * @param \Drupal\Core\Language\Language $target
370 371
 *   (optional) The language of the translated values. Defaults to the current
 *   content language.
372
 */
373
function content_translation_add_access(EntityInterface $entity, Language $source = NULL, Language $target = NULL) {
374
  $source = !empty($source) ? $source : $entity->language();
375
  $target = !empty($target) ? $target : language(Language::TYPE_CONTENT);
376 377
  $translations = $entity->getTranslationLanguages();
  $languages = language_list();
378
  return $source->id != $target->id && isset($languages[$source->id]) && isset($languages[$target->id]) && !isset($translations[$target->id]) && content_translation_access($entity, 'create');
379 380 381 382 383 384 385 386 387 388 389
}

/**
 * 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.
 */
390
function content_translation_edit_access(EntityInterface $entity, Language $language = NULL) {
391
  $language = !empty($language) ? $language : language(Language::TYPE_CONTENT);
392 393
  $translations = $entity->getTranslationLanguages();
  $languages = language_list();
394
  return isset($languages[$language->id]) && $language->id != $entity->getUntranslated()->language()->id && isset($translations[$language->id]) && content_translation_access($entity, 'update');
395 396 397 398 399 400 401 402 403 404 405
}

/**
 * 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.
 */
406
function content_translation_delete_access(EntityInterface $entity, Language $language = NULL) {
407
  $language = !empty($language) ? $language : language(Language::TYPE_CONTENT);
408 409
  $translations = $entity->getTranslationLanguages();
  $languages = language_list();
410
  return isset($languages[$language->id]) && $language->id != $entity->getUntranslated()->language()->id && isset($translations[$language->id]) && content_translation_access($entity, 'delete');
411 412 413
}

/**
414
 * Returns the key name used to store the configuration setting.
415
 *
416 417
 * Based on the entity type and bundle, the keys used to store configuration
 * will have a common root name.
418 419 420 421 422 423 424 425 426
 *
 * @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 $setting
 *   The name of the setting.
 *
 * @return string
427
 *   The key name of the configuration setting.
428 429 430 431
 *
 * @todo Generalize this logic so that it is available to any module needing
 *   per-bundle configuration.
 */
432
function content_translation_get_config_key($entity_type, $bundle, $setting) {
433 434
  $entity_type = preg_replace('/[^0-9a-zA-Z_]/', "_", $entity_type);
  $bundle = preg_replace('/[^0-9a-zA-Z_]/', "_", $bundle);
435
  return $entity_type . '.' . $bundle . '.content_translation.' . $setting;
436 437 438 439 440 441 442 443 444 445 446 447 448 449 450
}

/**
 * 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 $setting
 *   The name of the setting.
 *
 * @returns mixed
 *   The stored value for the given setting.
 */
451 452
function content_translation_get_config($entity_type, $bundle, $setting) {
  $key = content_translation_get_config_key($entity_type, $bundle, $setting);
453
  return \Drupal::config('content_translation.settings')->get($key);
454 455 456 457 458 459 460 461 462 463 464 465 466 467
}

/**
 * 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 $value
 *   The value to be stored for the given setting.
 */
468 469
function content_translation_set_config($entity_type, $bundle, $setting, $value) {
  $key = content_translation_get_config_key($entity_type, $bundle, $setting);
470
  return \Drupal::config('content_translation.settings')->set($key, $value)->save();
471 472 473 474 475 476 477 478 479 480 481 482 483 484
}

/**
 * Determines whether the given entity type is translatable.
 *
 * @param string $entity_type
 *   The type of the entity.
 * @param string $bundle
 *   (optional) The bundle of the entity. If no bundle is provided, all the
 *   available bundles are checked.
 *
 * @returns
 *   TRUE if the specified bundle is translatable. If no bundle is provided
 *   returns TRUE if at least one of the entity bundles is translatable.
485 486
 *
 * @todo Move to \Drupal\content_translation\ContentTranslationManager.
487
 */
488
function content_translation_enabled($entity_type, $bundle = NULL) {
489 490
  $enabled = FALSE;

491
  if (\Drupal::service('content_translation.manager')->isSupported($entity_type)) {
492 493
    $bundles = !empty($bundle) ? array($bundle) : array_keys(entity_get_bundles($entity_type));
    foreach ($bundles as $bundle) {
494
      if (content_translation_get_config($entity_type, $bundle, 'enabled')) {
495 496 497
        $enabled = TRUE;
        break;
      }
498 499 500
    }
  }

501
  return $enabled;
502 503 504
}

/**
505
 * Content translation controller factory.
506
 *
507
 * @param string $entity_type_id
508 509
 *   The type of the entity being translated.
 *
510 511
 * @return \Drupal\content_translation\ContentTranslationControllerInterface
 *   An instance of the content translation controller interface.
512 513
 *
 * @todo Move to \Drupal\content_translation\ContentTranslationManager.
514
 */
515 516
function content_translation_controller($entity_type_id) {
  $entity_type = \Drupal::entityManager()->getDefinition($entity_type_id);
517
  // @todo Throw an exception if the key is missing.
518 519
  $class = $entity_type->getControllerClass('translation');
  return new $class($entity_type);
520 521 522 523 524 525 526 527 528
}

/**
 * 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;
529
 *   An instance of the content translation form interface or FALSE if not an
530
 *   entity form.
531 532
 *
 * @todo Move to \Drupal\content_translation\ContentTranslationManager.
533
 */
534
function content_translation_form_controller(array $form_state) {
535 536 537 538
  return isset($form_state['controller']) && $form_state['controller'] instanceof EntityFormControllerInterface ? $form_state['controller'] : FALSE;
}

/**
539
 * Checks whether a content translation is accessible.
540 541 542
 *
 * @param \Drupal\Core\Entity\EntityInterface $entity
 *   The entity to be accessed.
543 544 545 546 547 548
 * @param $op
 *   The operation to be performed on the translation. Possible values are:
 *   - "view"
 *   - "update"
 *   - "delete"
 *   - "create"
549 550 551
 *
 * @return
 *   TRUE if the current user is allowed to view the translation.
552 553
 *
 * @todo Move to \Drupal\content_translation\ContentTranslationManager.
554
 */
555
function content_translation_access(EntityInterface $entity, $op) {
556
  return content_translation_controller($entity->getEntityTypeId())->getTranslationAccess($entity, $op) ;
557 558 559 560 561
}

/**
 * Implements hook_permission().
 */
562
function content_translation_permission() {
563
  $permission = array(
564
    'administer content translation' => array(
565
      'title' => t('Administer translation settings'),
566
      'description' => t('Configure translatability of entities and fields.'),
567
    ),
568
    'create content translations' => array(
569 570
      'title' => t('Create translations'),
    ),
571
    'update content translations' => array(
572 573
      'title' => t('Edit translations'),
    ),
574
    'delete content translations' => array(
575 576
      'title' => t('Delete translations'),
    ),
577 578 579 580 581
    'translate any entity' => array(
      'title' => t('Translate any entity'),
    ),
  );

582 583
  // Create a translate permission for each enabled entity type and (optionally)
  // bundle.
584 585 586
  foreach (\Drupal::entityManager()->getDefinitions() as $entity_type_id => $entity_type) {
    if ($permission_granularity = $entity_type->getPermissionGranularity()) {
      $t_args = array('@entity_label' => $entity_type->getLowercaseLabel());
587

588
      switch ($permission_granularity) {
589
        case 'bundle':
590 591
          foreach (entity_get_bundles($entity_type_id) as $bundle => $bundle_info) {
            if (content_translation_enabled($entity_type_id, $bundle)) {
592
              $t_args['%bundle_label'] = isset($bundle_info['label']) ? $bundle_info['label'] : $bundle;
593
              $permission["translate $bundle $entity_type_id"] = array(
594
                'title' => t('Translate %bundle_label @entity_label', $t_args),
595 596 597 598 599 600
              );
            }
          }
          break;

        case 'entity_type':
601 602
          if (content_translation_enabled($entity_type_id)) {
            $permission["translate $entity_type_id"] = array(
603 604 605 606 607
              'title' => t('Translate @entity_label', $t_args),
            );
          }
          break;
      }
608 609 610 611 612 613 614 615 616
    }
  }

  return $permission;
}

/**
 * Implements hook_form_alter().
 */
617
function content_translation_form_alter(array &$form, array &$form_state) {
618 619 620 621
  $form_controller = content_translation_form_controller($form_state);
  $entity = $form_controller ? $form_controller->getEntity() : NULL;

  if ($entity instanceof ContentEntityInterface && $entity->isTranslatable() && count($entity->getTranslationLanguages()) > 1) {
622
    $controller = content_translation_controller($entity->getEntityTypeId());
623 624 625 626 627 628 629 630 631 632
    $controller->entityFormAlter($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)) {
633
      foreach ($entity->getFieldDefinitions() as $property_name => $definition) {
634
        if (isset($form[$property_name])) {
635
          $form[$property_name]['#multilingual'] = $definition->isTranslatable();
636 637 638 639 640 641 642
        }
      }
    }

  }
}

643
/**
644
 * Implements hook_language_fallback_candidates_OPERATION_alter().
645 646 647
 *
 * Performs language fallback for unaccessible translations.
 */
648 649 650 651 652
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]);
653 654 655 656
    }
  }
}

657 658 659
/**
 * Implements hook_entity_load().
 */
660
function content_translation_entity_load(array $entities, $entity_type) {
661 662
  $enabled_entities = array();

663
  if (content_translation_enabled($entity_type)) {
664
    foreach ($entities as $entity) {
665
      if ($entity instanceof ContentEntityInterface && $entity->isTranslatable()) {
666 667 668 669 670 671
        $enabled_entities[$entity->id()] = $entity;
      }
    }
  }

  if (!empty($enabled_entities)) {
672
    content_translation_load_translation_metadata($enabled_entities, $entity_type);
673 674 675 676 677 678 679 680 681 682 683
  }
}

/**
 * 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.
 */
684 685
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)';
686
  $result = db_query($query, array(':entity_type' => $entity_type, ':entity_id' => array_keys($entities)));
687
  $exclude = array('entity_type', 'entity_id', 'langcode');
688 689 690
  foreach ($result as $record) {
    $entity = $entities[$record->entity_id];
    // @todo Declare these as entity (translation?) properties.
691 692
    foreach ($record as $field_name => $value) {
      if (!in_array($field_name, $exclude)) {
693 694 695 696 697
        $langcode = $record->langcode;
        $entity->translation[$langcode][$field_name] = $value;
        if (!$entity->hasTranslation($langcode)) {
          $entity->initTranslation($langcode);
        }
698 699
      }
    }
700 701 702 703 704 705
  }
}

/**
 * Implements hook_entity_insert().
 */
706
function content_translation_entity_insert(EntityInterface $entity) {
707
  // Only do something if translation support for the given entity is enabled.
708
  if (!($entity instanceof ContentEntityInterface) || !$entity->isTranslatable()) {
709 710 711
    return;
  }

712
  $fields = array('entity_type', 'entity_id', 'langcode', 'source', 'outdated', 'uid', 'status', 'created', 'changed');
713
  $query = db_insert('content_translation')->fields($fields);
714 715

  foreach ($entity->getTranslationLanguages() as $langcode => $language) {
716 717 718 719
    $translation = isset($entity->translation[$langcode]) ? $entity->translation[$langcode] : array();

    $translation += array(
      'source' => '',
720
      'uid' => \Drupal::currentUser()->id(),
721 722 723 724 725 726
      'outdated' => FALSE,
      'status' => TRUE,
      'created' => REQUEST_TIME,
      'changed' => REQUEST_TIME,
    );

727
    $translation['entity_type'] = $entity->getEntityTypeId();
728 729 730 731 732 733 734 735 736 737
    $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);
738 739 740 741 742 743 744 745
  }

  $query->execute();
}

/**
 * Implements hook_entity_delete().
 */
746
function content_translation_entity_delete(EntityInterface $entity) {
747
  // Only do something if translation support for the given entity is enabled.
748
  if (!($entity instanceof ContentEntityInterface) || !$entity->isTranslatable()) {
749 750 751
    return;
  }

752
  db_delete('content_translation')
753
    ->condition('entity_type', $entity->getEntityTypeId())
754 755 756 757 758 759 760
    ->condition('entity_id', $entity->id())
    ->execute();
}

/**
 * Implements hook_entity_update().
 */
761
function content_translation_entity_update(EntityInterface $entity) {
762
  // Only do something if translation support for the given entity is enabled.
763
  if (!($entity instanceof ContentEntityInterface) || !$entity->isTranslatable()) {
764 765 766
    return;
  }

767
  // Delete and create to ensure no stale value remains behind.
768 769
  content_translation_entity_delete($entity);
  content_translation_entity_insert($entity);
770 771 772 773 774
}

/**
 * Implements hook_field_extra_fields().
 */
775
function content_translation_field_extra_fields() {
776 777
  $extra = array();

778
  foreach (\Drupal::entityManager()->getDefinitions() as $entity_type => $info) {
779
    foreach (entity_get_bundles($entity_type) as $bundle => $bundle_info) {
780
      if (content_translation_enabled($entity_type, $bundle)) {
781 782 783 784 785 786 787 788 789 790 791 792 793
        $extra[$entity_type][$bundle]['form']['translation'] = array(
          'label' => t('Translation'),
          'description' => t('Translation settings'),
          'weight' => 10,
        );
      }
    }
  }

  return $extra;
}

/**
794
 * Implements hook_form_FORM_ID_alter() for 'field_ui_field_edit_form'.
795
 */
796
function content_translation_form_field_ui_field_edit_form_alter(array &$form, array &$form_state, $form_id) {
797 798 799
  $field = $form['#field'];
  $bundle = $form['#bundle'];
  $bundle_is_translatable = content_translation_enabled($field->entity_type, $bundle);
800 801 802
  $form['field']['translatable'] = array(
    '#type' => 'checkbox',
    '#title' => t('Users may translate this field.'),
803
    '#default_value' => $field->isTranslatable(),
804
    '#weight' => 20,
805
    '#disabled' => !$bundle_is_translatable,
806
  );
807
  $form['#submit'][] = 'content_translation_form_field_ui_field_edit_form_submit';
808 809 810 811 812 813 814 815 816 817

  // 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,
    ));
  }
818 819 820 821 822 823 824 825 826 827 828
}

/**
 * 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();
  }
829
  $value[$instance->getField()->getName()] = $form_state['values']['field']['translatable'];
830 831 832 833 834
  // Store the same value for all bundles as translatability is tracked per
  // field.
  foreach (entity_get_bundles($instance->entity_type) as $bundle => $info) {
    content_translation_set_config($instance->entity_type, $bundle, 'fields', $value);
  }
835 836
}

837
/**
838
 * Implements hook_form_FORM_ID_alter() for 'field_ui_field_instance_edit_form'.
839
 */
840
function content_translation_form_field_ui_field_instance_edit_form_alter(array &$form, array &$form_state, $form_id) {
841
  if ($form['#field']->isTranslatable()) {
842
    module_load_include('inc', 'content_translation', 'content_translation.admin');
843
    $element = content_translation_field_sync_widget($form['#field']);
844 845 846 847 848 849 850 851 852
    if ($element) {
      $form['instance']['settings']['translation_sync'] = $element;
    }
  }
}

/**
 * Implements hook_field_info_alter().
 */
853
function content_translation_field_info_alter(&$info) {
854
  foreach ($info as &$field_type_info) {
855 856 857 858 859 860 861 862
    // By default no column has to be synchronized.
    $field_type_info['settings'] += array('translation_sync' => FALSE);
    // Synchronization can be enabled per instance.
    $field_type_info['instance_settings'] += array('translation_sync' => FALSE);
  }
}

/**
863
 * Implements hook_entity_presave().
864
 */
865
function content_translation_entity_presave(EntityInterface $entity) {
866
  if ($entity instanceof ContentEntityInterface && $entity->isTranslatable()) {
867 868
    // @todo Avoid using request attributes once translation metadata become
    //   regular fields.
869 870
    $attributes = \Drupal::request()->attributes;
    \Drupal::service('content_translation.synchronizer')->synchronizeFields($entity, $entity->language()->id, $attributes->get('source_langcode'));
871 872 873
  }
}

874 875 876
/**
 * Implements hook_element_info_alter().
 */
877
function content_translation_element_info_alter(&$type) {
878
  if (isset($type['language_configuration'])) {
879
    $type['language_configuration']['#process'][] = 'content_translation_language_configuration_element_process';
880 881
  }
}
882

883
/**
884
 * Returns a widget to enable content translation per entity bundle.
885 886 887 888 889 890 891 892 893 894 895 896 897 898 899
 *
 * 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 $form_state
 *   The configuration form state array.
 */
900 901
function content_translation_enable_widget($entity_type, $bundle, array &$form, array &$form_state) {
  $key = $form_state['content_translation']['key'];
902 903 904 905
  if (!isset($form_state['language'][$key])) {
    $form_state['language'][$key] = array();
  }
  $form_state['language'][$key] += array('entity_type' => $entity_type, 'bundle' => $bundle);
906 907
  $element = content_translation_language_configuration_element_process(array('#name' => $key), $form_state, $form);
  unset($element['content_translation']['#element_validate']);
908 909 910 911 912 913 914 915 916 917 918 919
  return $element;
}

/**
 * Process callback: Expands the language_configuration form element.
 *
 * @param array $element
 *   Form API element.
 *
 * @return
 *   Processed language configuration element.
 */
920 921 922
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'];
923
    $context = $form_state['language'][$element['#name']];
924

925
    $element['content_translation'] = array(
926 927
      '#type' => 'checkbox',
      '#title' => t('Enable translation'),
928 929
      '#default_value' => content_translation_enabled($context['entity_type'], $context['bundle']),
      '#element_validate' => array('content_translation_language_configuration_element_validate'),
930 931
      '#prefix' => '<label>' . t('Translation') . '</label>',
    );
932

933
    $form['actions']['submit']['#submit'][] = 'content_translation_language_configuration_element_submit';
934
  }
935 936 937 938
  return $element;
}

/**
939
 * Form validation handler for element added with content_translation_language_configuration_element_process().
940 941 942 943 944
 *
 * 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.
 *
945
 * @see content_translation_language_configuration_element_submit()
946
 */
947 948
function content_translation_language_configuration_element_validate($element, array &$form_state, array $form) {
  $key = $form_state['content_translation']['key'];
949
  $values = $form_state['values'][$key];
950
  if (!$values['language_show'] && $values['content_translation'] && \Drupal::languageManager()->isLanguageLocked($values['langcode'])) {
951
    foreach (language_list(Language::STATE_LOCKED) as $language) {
952 953 954 955 956
      $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.
957
    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']])));
958 959 960 961
  }
}

/**
962
 * Form submission handler for element added with content_translation_language_configuration_element_process().
963
 *
964
 * Stores the content translation settings.
965
 *
966
 * @see content_translation_language_configuration_element_validate()
967
 */
968 969
function content_translation_language_configuration_element_submit(array $form, array &$form_state) {
  $key = $form_state['content_translation']['key'];
970
  $context = $form_state['language'][$key];
971
  $enabled = $form_state['values'][$key]['content_translation'];
972

973 974
  if (content_translation_enabled($context['entity_type'], $context['bundle']) != $enabled) {
    content_translation_set_config($context['entity_type'], $context['bundle'], 'enabled', $enabled);
975 976 977 978
    entity_info_cache_clear();
    menu_router_rebuild();
  }
}
979 980 981 982

/**
 * Implements hook_form_FORM_ID_alter() for language_content_settings_form().
 */
983 984 985
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);
986 987
}

988 989 990
/**
 * Implements hook_preprocess_HOOK() for theme_language_content_settings_table().
 */
991 992 993
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);
994 995
}

996
/**
997
 * Stores content translation settings.
998 999 1000 1001 1002 1003 1004 1005 1006
 *
 * @param array $settings
 *   An associative array of settings keyed by entity type and bundle. At bundle
 *   level the following keys are available:
 *   - translatable: The bundle translatability status, which is a bool.
 *   - settings: An array of language configuration settings as defined by
 *     language_save_default_configuration().
 *   - fields: An associative array with field names as keys and a boolean as
 *     value, indicating field translatability.
1007 1008
 *   - columns: An associative array of translation synchronization settings
 *     keyed by field names.
1009
 */
1010
function content_translation_save_settings($settings) {
1011 1012
  foreach ($settings as $entity_type => $entity_settings) {
    foreach ($entity_settings as $bundle => $bundle_settings) {
1013 1014 1015
      // The 'translatable' value is set only if it is possible to enable.
      if (isset($bundle_settings['translatable'])) {
        // Store whether a bundle has translation enabled or not.
1016
        content_translation_set_config($entity_type, $bundle, 'enabled', $bundle_settings['translatable']);
1017

1018 1019 1020 1021 1022
        // Store whether fields are translatable or not.
        if (!empty($bundle_settings['fields'])) {
          content_translation_set_config($entity_type, $bundle, 'fields', $bundle_settings['fields']);
        }

1023 1024 1025 1026
        // Store whether fields have translation enabled or not.
        if (!empty($bundle_settings['columns'])) {
          foreach ($bundle_settings['columns'] as $field_name => $column_settings) {
            $instance = field_info_instance($entity_type, $field_name, $bundle);
1027
            if ($instance->isTranslatable()) {
1028
              $instance->settings['translation_sync'] = $column_settings;
1029 1030 1031 1032
            }
            // If the field does not have translatable enabled we need to reset
            // the sync settings to their defaults.
            else {
1033
              unset($instance->settings['translation_sync']);
1034
            }
1035
            $instance->save();
1036 1037 1038
          }
        }
      }
1039 1040
    }
  }
1041

1042 1043 1044 1045
  // Ensure entity and menu router information are correctly rebuilt.
  entity_info_cache_clear();
  menu_router_rebuild();
}