dgi_image_discovery.module

<?php

/**
 * @file
 * General hook implementations.
 */

use Drupal\Core\Entity\EntityTypeInterface;
use Drupal\Core\Field\BaseFieldDefinition;
use Drupal\dgi_image_discovery\DIDImageItemList;

/**
 * Implements hook_entity_base_field_info().
 */
function dgi_image_discovery_entity_base_field_info(EntityTypeInterface $entity_type) {

  if ($entity_type->id() === 'node') {
    $fields = [];

    $fields['did_image'] = BaseFieldDefinition::create('did_image')
      ->setName('did_image')
      ->setLabel(t('DGI Image Discovery Discovered Image'))
      ->setDescription(t('Image to represent the given node.'))
      ->setComputed(TRUE)
      ->setClass(DIDImageItemList::class)
      ->setDisplayConfigurable('view', TRUE)
      ->setSetting('target_type', 'media');

    return $fields;
  }
}

/**
 * Implements hook_field_formatter_info_alter().
 */
function dgi_image_discovery_field_formatter_info_alter(array &$info) {
  $info['media_thumbnail']['field_types'][] = 'did_image';
}

/**
 * Implements hook_views_data_alter().
 */
function dgi_image_discovery_views_data_alter(array &$data) {
  $table = 'node';
  if (isset($data[$table])) {
    $data[$table]['did_image'] = [
      'title' => t('DGI Image Discovery Discovered Image'),
      'field' => [
        'id' => 'did_image',
        'field_name' => 'did_image',
      ],
    ];
  }
}