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<?php

namespace Drupal\Tests\migrate\Kernel;

use Drupal\KernelTests\KernelTestBase;
use Drupal\language\Entity\ConfigurableLanguage;
use Drupal\migrate\Plugin\migrate\destination\EntityContentBase;
use Drupal\migrate\Plugin\MigrateIdMapInterface;
use Drupal\migrate\Plugin\MigrationInterface;
use Drupal\migrate\Row;

/**
 * Tests the EntityContentBase destination.
 *
 * @group migrate
 */
class MigrateEntityContentBaseTest extends KernelTestBase {

  /**
   * Modules to enable.
   *
   * @var array
   */
  public static $modules = ['migrate', 'user', 'language', 'entity_test'];

  /**
   * The storage for entity_test_mul.
   *
   * @var \Drupal\Core\Entity\ContentEntityStorageInterface
   */
  protected $storage;

  /**
   * A content migrate destination.
   *
   * @var \Drupal\migrate\Plugin\MigrateDestinationInterface
   */
  protected $destination;

  /**
   * {@inheritdoc}
   */
  protected function setUp() {
    parent::setUp();
    $this->installEntitySchema('entity_test_mul');

    ConfigurableLanguage::createFromLangcode('en')->save();
    ConfigurableLanguage::createFromLangcode('fr')->save();

    $this->storage = $this->container->get('entity.manager')->getStorage('entity_test_mul');
  }

  /**
   * Check the existing translations of an entity.
   *
   * @param int $id
   *   The entity ID.
   * @param string $default
   *   The expected default translation language code.
   * @param string[] $others
   *   The expected other translation language codes.
   */
  protected function assertTranslations($id, $default, $others = []) {
    $entity = $this->storage->load($id);
    $this->assertTrue($entity, "Entity exists");
    $this->assertEquals($default, $entity->language()->getId(), "Entity default translation");
    $translations = array_keys($entity->getTranslationLanguages(FALSE));
    sort($others);
    sort($translations);
    $this->assertEquals($others, $translations, "Entity translations");
  }

  /**
   * Create the destination plugin to test.
   *
   * @param array $configuration
   *   The plugin configuration.
   */
  protected function createDestination(array $configuration) {
    $this->destination = new EntityContentBase(
      $configuration,
      'fake_plugin_id',
      [],
      $this->getMock(MigrationInterface::class),
      $this->storage,
      [],
      $this->container->get('entity.manager'),
      $this->container->get('plugin.manager.field.field_type')
    );
  }

  /**
   * Test importing and rolling back translated entities.
   */
  public function testTranslated() {
    // Create a destination.
    $this->createDestination(['translations' => TRUE]);

    // Create some pre-existing entities.
    $this->storage->create(['id' => 1, 'langcode' => 'en'])->save();
    $this->storage->create(['id' => 2, 'langcode' => 'fr'])->save();
    $translated = $this->storage->create(['id' => 3, 'langcode' => 'en']);
    $translated->save();
    $translated->addTranslation('fr')->save();

    // Pre-assert that things are as expected.
    $this->assertTranslations(1, 'en');
    $this->assertTranslations(2, 'fr');
    $this->assertTranslations(3, 'en', ['fr']);
    $this->assertFalse($this->storage->load(4));

    $destination_rows = [
      // Existing default translation.
      ['id' => 1, 'langcode' => 'en', 'action' => MigrateIdMapInterface::ROLLBACK_PRESERVE],
      // New translation.
      ['id' => 2, 'langcode' => 'en', 'action' => MigrateIdMapInterface::ROLLBACK_DELETE],
      // Existing non-default translation.
      ['id' => 3, 'langcode' => 'fr', 'action' => MigrateIdMapInterface::ROLLBACK_PRESERVE],
      // Brand new row.
      ['id' => 4, 'langcode' => 'fr', 'action' => MigrateIdMapInterface::ROLLBACK_DELETE],
    ];
    $rollback_actions = [];

    // Import some rows.
    foreach ($destination_rows as $idx => $destination_row) {
      $row = new Row([], []);
      foreach ($destination_row as $key => $value) {
        $row->setDestinationProperty($key, $value);
      }
      $this->destination->import($row);

      // Check that the rollback action is correct, and save it.
      $this->assertEquals($destination_row['action'], $this->destination->rollbackAction());
      $rollback_actions[$idx] = $this->destination->rollbackAction();
    }

    $this->assertTranslations(1, 'en');
    $this->assertTranslations(2, 'fr', ['en']);
    $this->assertTranslations(3, 'en', ['fr']);
    $this->assertTranslations(4, 'fr');

    // Rollback the rows.
    foreach ($destination_rows as $idx => $destination_row) {
      if ($rollback_actions[$idx] == MigrateIdMapInterface::ROLLBACK_DELETE) {
        $this->destination->rollback($destination_row);
      }
    }

    // No change, update of existing translation.
    $this->assertTranslations(1, 'en');
    // Remove added translation.
    $this->assertTranslations(2, 'fr');
    // No change, update of existing translation.
    $this->assertTranslations(3, 'en', ['fr']);
    // No change, can't remove default translation.
    $this->assertTranslations(4, 'fr');
  }

}