<?php

<?php

namespace Drupal\rl_migrates\Plugin\migrate\source;

use Drupal\migrate_drupal\Plugin\migrate\source\ContentEntity;

/**
 * ContentEntity migration source that accepts multiple bundles.
 *
 * This is a stop gap measure for:
 * https://www.drupal.org/project/drupal/issues/2746541?page=1#comment-13715441
 *
 * @MigrateSource(
 *   id = "bundles_kontent_entity",
 *   source_module = "migrate_drupal",
 *   deriver = "\Drupal\migrate_drupal\Plugin\migrate\source\ContentEntityDeriver",
 * )
 */
class BundlesKontentEntity extends ContentEntity {

  /**
   * Query to retrieve the entities.
   *
   * @return \Drupal\Core\Entity\Query\QueryInterface
   *   The query.
   */
  public function query() {
    $query = $this->entityTypeManager
      ->getStorage($this->entityType->id())
      ->getQuery()
      ->accessCheck(FALSE);
    if (!empty($this->configuration['bundles'])) {
      $query->condition($this->entityType->getKey('bundle'), $this->configuration['bundles'], 'IN');
    }
    if (!empty($this->configuration['include_allrevisions'])) {
      $query->allRevisions();
    }
    return $query;
  }

  /**
   * {@inheritdoc}
   */
  public function getIds() {
    $id_key = $this->entityType->getKey('id');
    $ids[$id_key] = $this->getDefinitionFromEntity($id_key);
    if ($this->entityType->isRevisionable()) {
      $revision_key = $this->entityType->getKey('revision');
      $ids[$revision_key] = $this->getDefinitionFromEntity($revision_key);
    }
    if ($this->entityType->isTranslatable()) {
      $langcode_key = $this->entityType->getKey('langcode');
      $ids[$langcode_key] = $this->getDefinitionFromEntity($langcode_key);
    }
    return $ids;
  }

  /**
   * Initializes the iterator with the source data.
   *
   * @return \Generator
   *   A data generator for this source.
   */
  protected function initializeIterator() {
    $ids = $this->query()->execute();
    $highWater = $this->getHighWater();
    $highWaterProperty = $this->getHighWaterProperty();
    $highWaterField = $this->getHighWaterField();
    $shouldUseHighWater = (!empty($highWaterProperty) && !empty($highWater));
    // Closure to check wheter intention is to do only-new or update all.
    $intendsUpdateAll = function () : bool {
      $shouldSkip = FALSE;
      $arguments = $GLOBALS['argv'] ?? [];
      foreach ($arguments as $argument) {
        $shouldSkip = (strpos($argument, '--update') !== FALSE) ? TRUE : $shouldSkip;
      }
      return $shouldSkip;
    };
    // Array of ids is usually index by revision_id to a value of base_id.
    $targetVariable = (in_array($highWaterField, ['revision_id', 'vid'])) ? 'key' : 'element';
    // Filter only the array of ids that is higher than highwater.
    $parsedIds = ($shouldUseHighWater && !$intendsUpdateAll()) ? array_filter($ids, function ($element, $key) use ($highWater, $targetVariable) {
      $target = ${$targetVariable};
      $isHigher = ($highWater <= $target);
      return $isHigher;
    }, ARRAY_FILTER_USE_BOTH) : $ids;
    $outputYield = (!empty($this->configuration['include_allrevisions']) && method_exists($this, 'yieldEntityRevisions')) ? $this->yieldEntityRevisions($parsedIds) : $this->yieldEntities($parsedIds);
    return $outputYield;
  }

  /**
   * Loads and yields entities, one at a time.
   *
   * @param array $ids
   *   The entity IDs.
   *
   * @return \Generator
   *   An iterable of the loaded entities.
   */
  protected function yieldEntities(array $ids) {
    $storage = $this->entityTypeManager
      ->getStorage($this->entityType->id());
    foreach ($ids as $id) {
      /** @var \Drupal\Core\Entity\ContentEntityInterface $entity */
      $entity = $storage->load($id);
      yield $this->toArray($entity);
      if ($this->configuration['include_translations']) {
        foreach ($entity->getTranslationLanguages(FALSE) as $language) {
          yield $this->toArray($entity->getTranslation($language->getId()));
        }
      }
    }
  }

  /**
   * Loads and yields entities-revision sensitive., one at a time.
   *
   * @param array $ids
   *   The entity vid and entity ids.
   *
   * @return \Generator
   *   An iterable of the loaded entities.
   */
  protected function yieldEntityRevisions(array $ids) {
    $storage = $this->entityTypeManager
      ->getStorage($this->entityType->id());
    foreach ($ids as $vid => $id) {
      /** @var \Drupal\Core\Entity\ContentEntityInterface $entity */
      $entity = $storage->loadRevision($vid);
      yield $this->toArray($entity);
      if ($this->configuration['include_translations']) {
        foreach ($entity->getTranslationLanguages(FALSE) as $language) {
          yield $this->toArray($entity->getTranslation($language->getId()));
        }
      }
    }
  }

}