protected function AbstractSearchApiSolrMultilingualBackend::preQuery in Search API Multilingual Solr Search 8

Modify the query before it is sent to solr.

Replaces all language unspecific fulltext query fields by language specific ones.

Parameters

\Solarium\Core\Query\QueryInterface $solarium_query: The Solarium select query object.

\Drupal\search_api\Query\QueryInterface $query: The \Drupal\search_api\Query\Query object representing the executed search query.

File

src/Plugin/search_api/backend/AbstractSearchApiSolrMultilingualBackend.php, line 183

Class

AbstractSearchApiSolrMultilingualBackend

A abstract base class for all multilingual Solr Search API backends.

Namespace

Drupal\search_api_solr_multilingual\Plugin\search_api\backend

Code

protected function preQuery(SolariumQueryInterface $solarium_query, QueryInterface $query) {

  // Do not modify 'Server index status' queries.
  // @see https://www.drupal.org/node/2668852
  if ($query
    ->hasTag('server_index_status')) {
    return;
  }
  parent::preQuery($solarium_query, $query);
  $language_ids = $query
    ->getLanguages();
  if (!empty($language_ids)) {
    $mlt = $query
      ->hasTag('mlt');
    $edismax = NULL;
    $hl = NULL;
    $solr_fields = NULL;
    $highlighted_fields = [];
    if ($mlt) {

      /** @var \Solarium\QueryType\MoreLikeThis\Query $solarium_query */
      $solr_fields = implode(' ', $solarium_query
        ->getMltFields());
    }
    else {

      /** @var \Solarium\QueryType\Select\Query\Query $solarium_query */
      $edismax = $solarium_query
        ->getEDisMax();
      $solr_fields = $edismax
        ->getQueryFields();
      $hl = $solarium_query
        ->getHighlighting();
      $highlighted_fields = $hl
        ->getFields();
    }
    $index = $query
      ->getIndex();
    $fulltext_fields = $this
      ->getQueryFulltextFields($query);
    $field_names = $this
      ->getSolrFieldNames($index);
    foreach ($fulltext_fields as $fulltext_field) {
      $field_name = $field_names[$fulltext_field];
      $boost = '';
      if (preg_match('@' . $field_name . '(\\^[\\d.]+)@', $solr_fields, $matches)) {
        $boost = $matches[1];
      }
      $language_specific_fields = [];
      $language_specific_fields_boosted = [];
      foreach ($language_ids as $language_id) {
        $language_specific_field = SearchApiSolrUtility::encodeSolrName(Utility::getLanguageSpecificSolrDynamicFieldNameForSolrDynamicFieldName($field_name, $language_id));
        $language_specific_fields[] = $language_specific_field;
        $language_specific_fields_boosted[] = $language_specific_field . $boost;
      }
      $solr_fields = str_replace($field_name . $boost, implode(' ', array_unique($language_specific_fields_boosted)), $solr_fields);
      if (isset($highlighted_fields[$field_name])) {
        foreach ($language_specific_fields as $language_specific_field) {

          // Copy the already set highlighting options over to the langauge
          // specific fields.
          $highlighted_field = $hl
            ->getField($language_specific_field);
          $highlighted_field
            ->setOptions($highlighted_fields[$field_name]
            ->getOptions());
          $highlighted_field
            ->setName($language_specific_field);
        }
        $hl
          ->removeField($field_name);
      }
    }
    if ($mlt) {
      $solarium_query
        ->setMltFields(explode(' ', $solr_fields));
    }
    else {
      $edismax
        ->setQueryFields($solr_fields);
    }
    if (empty($this->configuration['retrieve_data'])) {

      // We need the language to be part of the result to modify the result
      // accordingly in extractResults().
      $solarium_query
        ->addField($field_names[SEARCH_API_LANGUAGE_FIELD_NAME]);
    }
  }
}