user_access_test.module

<?php


/**
 * @file
 * Dummy module implementing hook_user_access() to test if entity access is respected.
 */
use Drupal\Core\Access\AccessResult;
use Drupal\Core\Field\FieldDefinitionInterface;
use Drupal\Core\Field\FieldItemListInterface;
use Drupal\Core\Session\AccountInterface;
use Drupal\user\Entity\User;

/**
 * Implements hook_ENTITY_TYPE_access() for entity type "user".
 */
function user_access_test_user_access(User $entity, $operation, $account) {
    if ($entity->getAccountName() == "no_edit" && $operation == "update") {
        // Deny edit access.
        return AccessResult::forbidden();
    }
    if ($entity->getAccountName() == "no_delete" && $operation == "delete") {
        // Deny delete access.
        return AccessResult::forbidden();
    }
    // Account with role sub-admin can manage users with no roles.
    if (count($entity->getRoles()) == 1) {
        return AccessResult::allowedIfHasPermission($account, 'sub-admin');
    }
    return AccessResult::neutral();
}

/**
 * Implements hook_entity_create_access().
 */
function user_access_test_entity_create_access(AccountInterface $account, array $context, $entity_bundle) {
    if ($context['entity_type_id'] != 'user') {
        return AccessResult::neutral();
    }
    // Account with role sub-admin can create users.
    return AccessResult::allowedIfHasPermission($account, 'sub-admin');
}

/**
 * Implements hook_entity_field_access().
 */
function user_access_test_entity_field_access($operation, FieldDefinitionInterface $field_definition, AccountInterface $account, FieldItemListInterface $items = NULL) {
    // Account with role sub-admin can view the status, init and mail fields for
    // user with no roles.
    if ($field_definition->getTargetEntityTypeId() == 'user' && $operation === 'view' && in_array($field_definition->getName(), [
        'status',
        'init',
        'mail',
    ])) {
        if ($items == NULL || count($items->getEntity()
            ->getRoles()) == 1) {
            return AccessResult::allowedIfHasPermission($account, 'sub-admin');
        }
    }
    return AccessResult::neutral();
}