TranslationHelper.php in Inline Entity Form 8

Namespace

Drupal\inline_entity_form

File

src/TranslationHelper.php

<?php

namespace Drupal\inline_entity_form;

use Drupal\Core\Entity\ContentEntityInterface;
use Drupal\Core\Form\FormStateInterface;

/**
 * Provides content translation helpers.
 */
class TranslationHelper {

  /**
   * Prepares the inline entity for translation.
   *
   * @param \Drupal\Core\Entity\ContentEntityInterface $entity
   *   The inline entity.
   * @param \Drupal\Core\Form\FormStateInterface $form_state
   *   The form state.
   *
   * @return \Drupal\Core\Entity\ContentEntityInterface
   *   The prepared entity.
   *
   * @see \Drupal\Core\Entity\ContentEntityForm::initFormLangcodes()
   */
  public static function prepareEntity(ContentEntityInterface $entity, FormStateInterface $form_state) {
    $form_langcode = $form_state
      ->get('langcode');
    if (empty($form_langcode) || !$entity
      ->isTranslatable()) {
      return $entity;
    }
    $entity_langcode = $entity
      ->language()
      ->getId();
    if (self::isTranslating($form_state) && !$entity
      ->hasTranslation($form_langcode)) {

      // Create a translation from the source language values.
      $source = $form_state
        ->get([
        'content_translation',
        'source',
      ]);
      $source_langcode = $source ? $source
        ->getId() : $entity_langcode;
      if (!$entity
        ->hasTranslation($source_langcode)) {
        $entity
          ->addTranslation($source_langcode, $entity
          ->toArray());
      }
      $source_translation = $entity
        ->getTranslation($source_langcode);
      $entity
        ->addTranslation($form_langcode, $source_translation
        ->toArray());
      $translation = $entity
        ->getTranslation($form_langcode);
      $translation
        ->set('content_translation_source', $source_langcode);

      // Make sure we do not inherit the affected status from the source values.
      if ($entity
        ->getEntityType()
        ->isRevisionable()) {
        $translation
          ->setRevisionTranslationAffected(NULL);
      }
    }
    if ($entity_langcode != $form_langcode && $entity
      ->hasTranslation($form_langcode)) {

      // Switch to the needed translation.
      $entity = $entity
        ->getTranslation($form_langcode);
    }
    return $entity;
  }

  /**
   * Updates the entity langcode to match the form langcode.
   *
   * Called on submit to allow the user to select a different language through
   * the langcode form element, which is then transferred to form state.
   *
   * @param \Drupal\Core\Entity\ContentEntityInterface $entity
   *   The entity.
   * @param \Drupal\Core\Form\FormStateInterface $form_state
   *   The current state of the form.
   *
   * @return bool
   *   TRUE if the entity langcode was updated, FALSE otherwise.
   */
  public static function updateEntityLangcode(ContentEntityInterface $entity, FormStateInterface $form_state) {
    $changed = FALSE;

    // This method is first called during form validation, at which point
    // the 'langcode' form state flag hasn't been updated with the new value.
    $form_langcode = $form_state
      ->getValue([
      'langcode',
      0,
      'value',
    ], $form_state
      ->get('langcode'));
    if (empty($form_langcode) || !$entity
      ->isTranslatable()) {
      return $changed;
    }
    $entity_langcode = $entity
      ->language()
      ->getId();
    if ($entity_langcode != $form_langcode && !$entity
      ->hasTranslation($form_langcode)) {
      $langcode_key = $entity
        ->getEntityType()
        ->getKey('langcode');
      $entity
        ->set($langcode_key, $form_langcode);
      $changed = TRUE;
    }
    return $changed;
  }

  /**
   * Determines whether there's a translation in progress.
   *
   * If the root entity is being translated, then all of the inline entities
   * are candidates for translating as well.
   *
   * @param \Drupal\Core\Form\FormStateInterface $form_state
   *   The form state.
   *
   * @return bool
   *   TRUE if translating is in progress, FALSE otherwise.
   *
   * @see \Drupal\Core\Entity\ContentEntityForm::initFormLangcodes()
   */
  public static function isTranslating(FormStateInterface $form_state) {
    $form_langcode = $form_state
      ->get('langcode');
    $default_langcode = $form_state
      ->get('entity_default_langcode');
    if (empty($form_langcode) && empty($default_langcode)) {

      // The top-level form is not a content entity form.
      return FALSE;
    }
    else {
      return $form_langcode != $default_langcode;
    }
  }

}

Classes

Name	Description
TranslationHelper	Provides content translation helpers.