<?php

/**
 * @file
 * Update scripts for the Metatag Open Graph module.
 */

use Drupal\Core\Entity\ContentEntityBase;
use Drupal\Core\Language\LanguageInterface;
use Drupal\metatag\Entity\MetatagDefaults;

/**
 * Implementsations of hook_update_N().
 */

/**
 * The "article:tags" meta tag was renamed to the correct "article:tag".
 */
function metatag_open_graph_update_8101() {
  /* @var $configs Drupal\metatag\Entity\MetatagDefaults */
  $configs = MetatagDefaults::loadMultiple();

  foreach ($configs as $config) {
    $tags = $config->get('tags');

    if (array_key_exists("article_tags", $tags)) {
      $tags['article_tag'] = $tags['article_tags'];
      unset($tags['article_tags']);
      $config->set("tags", $tags);
      $config->save();
    }
  }
}

/**
 * The "article_tags" tag config was renamed "article_tag" on content entities.
 */
function metatag_open_graph_update_8102(&$sandbox) {
  // Update existing content with reference to old article_tags.
  $etm = Drupal::entityTypeManager();

  if (empty($sandbox)) {

    $field_map = Drupal::getContainer()->get('entity_field.manager')->getFieldMap();
    $sandbox['todo'] = [];
    $sandbox['done'] = 0;
    $sandbox['max'] = 0;
    $sandbox['#finished'] = 0;

    foreach ($field_map as $entity_type => $fields) {
      foreach ($fields as $field_name => $field_def) {
        if ($field_def['type'] == "metatag") {
          // We found a metatag field, so query for all the entities of this
          // type that have "article_tags" in the serialized array.
          $q = \Drupal::entityQuery($entity_type);
          $q->condition($field_name, "article_tags", "CONTAINS");
          $count = $q->count()->execute();

          if ($count > 0) {
            $sandbox['todo'][$entity_type][$field_name] = 0;
            $sandbox['max'] += $count;
          }
        }
      }
    }

    if ($sandbox['max'] == 0) {
      // Nothing to do.
      $sandbox['#finished'] = 1;
      return;
    }
  }

  foreach ($sandbox['todo'] as $entity_type => $fields) {

    /* @var $def Drupal\Core\Entity\ContentEntityType */
    $def = Drupal::entityTypeManager()->getDefinition($entity_type);

    // Grab the primary key field for this entity type
    // so we can filter and order by it.
    $id_col = $def->getKey("id");

    foreach ($fields as $field_name => $last) {
      $q = \Drupal::entityQuery($entity_type);
      $q->condition($field_name, "article_tags", "CONTAINS");
      $q->condition($id_col, $last, ">");
      $q->sort($id_col);
      $q->pager(20);
      $res = $q->execute();

      if (empty($res)) {
        unset($sandbox['todo'][$entity_type][$field_name]);
        continue;
      }

      $entities = $etm->getStorage($entity_type)->loadMultiple($res);

      foreach ($entities as $entity) {
        /* @var $entity ContentEntityBase */
        if ($entity instanceof ContentEntityBase) {
          if ($entity->hasField($field_name)) {
            /* @var LanguageInterface $langcode */
            foreach ($entity->getTranslationLanguages() as $langcode) {
              // For each translation of this entity (including the source)...
              $trans = $entity->getTranslation($langcode->getId());
              $tags_serialized = $trans->get($field_name)->value;
              if ($tags_serialized) {
                // Change key from article_tags to article_tag.
                $tags = unserialize($tags_serialized);
                if (array_key_exists("article_tags", $tags)) {
                  $tags['article_tag'] = $tags['article_tags'];
                  unset($tags['article_tags']);
                  $trans->set($field_name, serialize($tags));
                  $trans->save();
                }
              }
            }
          }
        }

        // Store the last pk per entity type and field name.
        $sandbox['todo'][$entity_type][$field_name] = $entity->id();
        $sandbox['done']++;
        $sandbox['#finished'] = $sandbox['done'] / $sandbox['max'];
      }
    }
  }
}