elasticsearch_search_api-1.0.x-dev/src/Strategy/DidYouMean.php

<?php

namespace Drupal\elasticsearch_search_api\Strategy;

use Drupal\elasticsearch_search_api\SyncStrategy;
use nodespark\DESConnector\ClientInterface;

/**
 * Strategy to configure trigram on the 'title' field.
 *
 * @package Drupal\elasticsearch_search_api\Strategy
 */
class DidYouMean extends SyncStrategy {

  /**
   * {@inheritdoc}
   */
  public function execute(ClientInterface $client, array $settingsParams = [], array $mappingParams = []) {
    $response = $this->getFieldMapping($client, 'title');
    $fieldMapping = $response['mappings']['title']['mapping']['title'];

    $fieldMapping['fields']['trigram'] = [
      'type' => 'text',
      'analyzer' => 'trigram',
    ];

    $mappingParams = [
      'index' => $this->indexName,
      'body' => [
        'properties' => [
          'title' => $fieldMapping,
        ],
      ],
    ];

    $settingsParams = [
      'index' => $this->indexName,
      'body' => [
        'analysis' => [
          'filter' => [
            'shingle' => [
              'type' => 'shingle',
              'min_shingle_size' => 2,
              'max_shingle_size' => 3,
            ],
          ],
          'analyzer' => [
            'trigram' => [
              'type' => 'custom',
              'tokenizer' => 'standard',
              'filter' => [
                'lowercase',
                'shingle',
              ],
            ],
          ],
        ],
      ],
    ];

    parent::execute($client, $settingsParams, $mappingParams);
  }

}