custom_elements-8.x-2.x-dev/tests/modules/custom_elements_test_paragraphs/custom_elements_test_paragraphs.module

<?php

/**
 * @file
 * Contains hook implementations for testing Custom elements module.
 */

use Drupal\Core\Access\AccessResult;
use Drupal\Core\Field\FieldDefinitionInterface;
use Drupal\Core\Field\FieldItemListInterface;
use Drupal\Core\Session\AccountInterface;

/**
 * Implements hook_entity_field_access().
 *
 * @see \Drupal\Tests\rest\Functional\EntityResource\EntityResourceTestBase::setUp()
 */
function custom_elements_test_paragraphs_entity_field_access($operation, FieldDefinitionInterface $field_definition, AccountInterface $account, ?FieldItemListInterface $items = NULL) {
  // @see \Drupal\Tests\custom_elements\Functional\CustomElementsRenderMarkupTest::doTestImageParagraph()
  // @see \Drupal\Tests\custom_elements\Functional\CustomElementsRenderMarkupTest::testNodeRendering()
  if ($field_definition->getName() === 'field_teaser_text' || $field_definition->getName() === 'field_source') {
    switch ($operation) {
      case 'view':
        // Never ever allow this field to be viewed: this lets
        // EntityResourceTestBase::testGet() test in a "vanilla" way.
        return AccessResult::forbidden();

      case 'edit':
        return AccessResult::forbidden();
    }
  }

  // No opinion.
  return AccessResult::neutral();
}