drupal/core/modules/content_translation/content_translation.install

<?php

/**
 * @file
 * Installation functions for Content Translation module.
 */

use Drupal\Core\Entity\EntityTypeInterface;
use Drupal\Core\Language\LanguageInterface;
use Drupal\language\Plugin\LanguageNegotiation\LanguageNegotiationUrl;

/**
 * Implements hook_schema().
 */
function content_translation_schema() {
  $schema['content_translation'] = array(
    'description' => 'Table to track content translations',
    'fields' => array(
      'entity_type' => array(
        'type' => 'varchar',
        'length' => EntityTypeInterface::ID_MAX_LENGTH,
        'not null' => TRUE,
        'default' => '',
        'description' => 'The entity type this translation relates to',
      ),
      'entity_id' => array(
        'type' => 'varchar',
        'length' => 128,
        'not null' => TRUE,
        'default' => '',
        'description' => 'The entity id this translation relates to',
      ),
      'langcode' => array(
        'type' => 'varchar',
        'length' => 32,
        'not null' => TRUE,
        'default' => '',
        'description' => 'The target language for this translation.',
      ),
      'source' => array(
        'type' => 'varchar',
        'length' => 32,
        'not null' => TRUE,
        'default' => '',
        'description' => 'The source language from which this translation was created.',
      ),
      'outdated' => array(
        'description' => 'A boolean indicating whether this translation needs to be updated.',
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
      ),
      'uid' => array(
        'description' => 'The author of this translation.',
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
      ),
      'status' => array(
        'description' => 'Boolean indicating whether the translation is visible to non-translators.',
        'type' => 'int',
        'not null' => TRUE,
        'default' => 1,
      ),
      'created' => array(
        'description' => 'The Unix timestamp when the translation was created.',
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
      ),
      'changed' => array(
        'description' => 'The Unix timestamp when the translation was most recently saved.',
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
      ),
    ),
    'primary key' => array('entity_type', 'entity_id', 'langcode'),
  );
  return $schema;
}

/**
 * Implements hook_install().
 */
function content_translation_install() {
  // Assign a fairly low weight to ensure our implementation of
  // hook_module_implements_alter() is run among the last ones.
  module_set_weight('content_translation', 10);
  \Drupal::service('language_negotiator')->saveConfiguration(LanguageInterface::TYPE_CONTENT, array(LanguageNegotiationUrl::METHOD_ID => 0));

  $config_names = \Drupal::configFactory()->listAll('field.field.');
  foreach ($config_names as $name) {
    \Drupal::config($name)
      ->set('settings.translation_sync', FALSE)
      ->save();
  }
  $config_names = \Drupal::configFactory()->listAll('field.instance.');
  foreach ($config_names as $name) {
    \Drupal::config($name)
      ->set('settings.translation_sync', FALSE)
      ->save();
  }
}

/**
 * Implements hook_enable().
 */
function content_translation_enable() {
  // Translation works when at least two languages are added.
  if (count(\Drupal::languageManager()->getLanguages()) < 2) {
    $t_args = array('!language_url' => url('admin/config/regional/language'));
    $message = t('Be sure to <a href="!language_url">add at least two languages</a> to translate content.', $t_args);
    drupal_set_message($message, 'warning');
  }
  // Point the user to the content translation settings.
  $t_args = array('!settings_url' => url('admin/config/regional/content-language'));
  $message = t('<a href="!settings_url">Enable translation</a> for <em>content types</em>, <em>taxonomy vocabularies</em>, <em>accounts</em>, or any other element you wish to translate.', $t_args);
  drupal_set_message($message, 'warning');
}

/**
 * Implements hook_uninstall().
 */
function content_translation_uninstall() {
  $config_names = \Drupal::configFactory()->listAll('field.field.');
  foreach ($config_names as $name) {
    \Drupal::config($name)
      ->clear('settings.translation_sync')
      ->save();
  }
  $config_names = \Drupal::configFactory()->listAll('field.instance.');
  foreach ($config_names as $name) {
    \Drupal::config($name)
      ->clear('settings.translation_sync')
      ->save();
  }
}