class FileResourceTestBase

abstract class FileResourceTestBase extends EntityResourceTestBase {
    use BcTimestampNormalizerUnixTestTrait;
    
    /**
     * {@inheritdoc}
     */
    public static $modules = [
        'file',
        'user',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected static $entityTypeId = 'file';
    
    /**
     * @var \Drupal\file\FileInterface
     */
    protected $entity;
    
    /**
     * {@inheritdoc}
     */
    protected static $patchProtectedFieldNames = [
        'uri' => NULL,
        'filemime' => NULL,
        'filesize' => NULL,
        'status' => NULL,
        'changed' => NULL,
    ];
    
    /**
     * @var \Drupal\user\UserInterface
     */
    protected $author;
    
    /**
     * {@inheritdoc}
     */
    protected function setUpAuthorization($method) {
        switch ($method) {
            case 'GET':
                $this->grantPermissionsToTestedRole([
                    'access content',
                ]);
                break;
            case 'PATCH':
            case 'DELETE':
                // \Drupal\file\FileAccessControlHandler::checkAccess() grants 'update'
                // and 'delete' access only to the user that owns the file. So there is
                // no permission to grant: instead, the file owner must be changed from
                // its default (user 1) to the current user.
                $this->makeCurrentUserFileOwner();
                break;
        }
    }
    
    /**
     * {@inheritdoc}
     */
    protected function grantPermissionsToTestedRole(array $permissions) {
        // testPatch() and testDelete() test the 'bc_entity_resource_permissions' BC
        // layer; also call makeCurrentUserFileOwner() then.
        if ($permissions === [
            'restful patch entity:file',
        ] || $permissions === [
            'restful delete entity:file',
        ]) {
            $this->makeCurrentUserFileOwner();
        }
        parent::grantPermissionsToTestedRole($permissions);
    }
    
    /**
     * Makes the current user the file owner.
     */
    protected function makeCurrentUserFileOwner() {
        $account = static::$auth ? User::load(2) : User::load(0);
        $this->entity
            ->setOwnerId($account->id());
        $this->entity
            ->setOwner($account);
        $this->entity
            ->save();
    }
    
    /**
     * {@inheritdoc}
     */
    protected function createEntity() {
        $this->author = User::load(1);
        $file = File::create();
        $file->setOwnerId($this->author
            ->id());
        $file->setFilename('drupal.txt');
        $file->setMimeType('text/plain');
        $file->setFileUri('public://drupal.txt');
        $file->set('status', FILE_STATUS_PERMANENT);
        $file->save();
        file_put_contents($file->getFileUri(), 'Drupal');
        return $file;
    }
    
    /**
     * {@inheritdoc}
     */
    protected function getExpectedNormalizedEntity() {
        return [
            'changed' => [
                $this->formatExpectedTimestampItemValues($this->entity
                    ->getChangedTime()),
            ],
            'created' => [
                $this->formatExpectedTimestampItemValues((int) $this->entity
                    ->getCreatedTime()),
            ],
            'fid' => [
                [
                    'value' => 1,
                ],
            ],
            'filemime' => [
                [
                    'value' => 'text/plain',
                ],
            ],
            'filename' => [
                [
                    'value' => 'drupal.txt',
                ],
            ],
            'filesize' => [
                [
                    'value' => (int) $this->entity
                        ->getSize(),
                ],
            ],
            'langcode' => [
                [
                    'value' => 'en',
                ],
            ],
            'status' => [
                [
                    'value' => TRUE,
                ],
            ],
            'uid' => [
                [
                    'target_id' => (int) $this->author
                        ->id(),
                    'target_type' => 'user',
                    'target_uuid' => $this->author
                        ->uuid(),
                    'url' => base_path() . 'user/' . $this->author
                        ->id(),
                ],
            ],
            'uri' => [
                [
                    'url' => base_path() . $this->siteDirectory . '/files/drupal.txt',
                    'value' => 'public://drupal.txt',
                ],
            ],
            'uuid' => [
                [
                    'value' => $this->entity
                        ->uuid(),
                ],
            ],
        ];
    }
    
    /**
     * {@inheritdoc}
     */
    protected function getNormalizedPostEntity() {
        return [
            'uid' => [
                [
                    'target_id' => $this->author
                        ->id(),
                ],
            ],
            'filename' => [
                [
                    'value' => 'drupal.txt',
                ],
            ],
        ];
    }
    
    /**
     * {@inheritdoc}
     */
    protected function getNormalizedPatchEntity() {
        return array_diff_key($this->getNormalizedPostEntity(), [
            'uid' => TRUE,
        ]);
    }
    
    /**
     * {@inheritdoc}
     */
    protected function getExpectedCacheContexts() {
        return [
            'user.permissions',
        ];
    }
    
    /**
     * {@inheritdoc}
     */
    public function testPost() {
        // Drupal does not allow creating file entities independently. It allows you
        // to create file entities that are referenced from another entity (e.g. an
        // image for a node's image field).
        // For that purpose, there is the "file_upload" REST resource plugin.
        // @see \Drupal\file\FileAccessControlHandler::checkCreateAccess()
        // @see \Drupal\file\Plugin\rest\resource\FileUploadResource
        $this->markTestSkipped();
    }
    
    /**
     * {@inheritdoc}
     */
    protected function getExpectedUnauthorizedAccessMessage($method) {
        if ($this->config('rest.settings')
            ->get('bc_entity_resource_permissions')) {
            if ($method === 'DELETE') {
                return 'Only the file owner can update or delete the file entity.';
            }
            return parent::getExpectedUnauthorizedAccessMessage($method);
        }
        if ($method === 'GET') {
            return "The 'access content' permission is required.";
        }
        if ($method === 'PATCH' || $method === 'DELETE') {
            return 'Only the file owner can update or delete the file entity.';
        }
        return parent::getExpectedUnauthorizedAccessMessage($method);
    }

}