islandora_iiif_hocr.module

<?php

/**
 * @file
 * Primary module hooks for Islandora IIIF hOCR module.
 */
 use Drupal\search_api\Query\QueryInterface;
 use Drupal\views\ViewExecutable;

/**
 * Implementation of hook_views_query_alter().
 *
 * Since we have to handle the Mirador's sending search queries witha 'q' parameter, which you can't
 * set as a Search API query id, we must parse the 'q' parameter and set it as the query key(s) ourselves.
 *
 * @param \Drupal\views\ViewExecutable $view
 *  The View to be modified.
 * @param \Drupal\views\Plugin\views\query\QueryPluginBase $query
 *  The Search API query.
 */
function islandora_iiif_hocr_views_query_alter(\Drupal\views\ViewExecutable $view, \Drupal\views\Plugin\views\query\QueryPluginBase $query) {

  // Bail if this is not a Search API query with the 'enable_hocr' tag.
  if (is_a($query, 'Drupal\search_api\Plugin\views\query\SearchApiQuery')
    && array_key_exists('query_tags', $query->options)
    && in_array('enable_hocr', $query->options['query_tags'])) {
    $query->setOption('islandora_hocr_properties', [
      'content' => [],
    ]);
  }
}

/**
 * Implements hook_views_pre_view().
 *
 * Handle the fact that Mirador's search always sends queries to '?q='.
 */
function islandora_iiif_hocr_views_pre_view(ViewExecutable $view, string $display_id, array $args) {
  $query_keys =  \Drupal::request()->query->get('q');
  if ($query_keys) {

    $exposed_input = $view->getExposedInput();
    $exposed_input['search_hocr'] = $query_keys;
    $view->setExposedInput($exposed_input);
  }
}