class AccessTest

class AccessTest extends KernelTestBase {
    use UserCreationTrait;
    use TestFileCreationTrait;
    
    /**
     * Modules to enable.
     *
     * @var array
     */
    protected static $modules = [
        'file',
        'system',
        'user',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        $this->installEntitySchema('file');
        $this->installEntitySchema('user');
        $this->installSchema('file', [
            'file_usage',
        ]);
    }
    
    /**
     * Tests 'update' and 'delete' access to file entities.
     */
    public function testFileAccess() : void {
        // Create a user so the tested users do not have the magic ID of user 1.
        $this->createUser();
        $user_any = $this->createUser([
            'delete any file',
        ]);
        $this->assertGreaterThan(1, (int) $user_any->id());
        $user_own = $this->createUser([
            'delete own files',
        ]);
        $test_files = $this->getTestFiles('text');
        $file1 = File::create((array) $test_files[0]);
        $file1->set('uid', $user_any->id());
        $file1->save();
        $file2 = File::create((array) $test_files[1]);
        $file2->set('uid', $user_own->id());
        $file2->save();
        // User with "* any file" permissions should delete all files and update
        // their own.
        $this->assertTrue($file1->access('delete', $user_any));
        $this->assertTrue($file1->access('update', $user_any));
        $this->assertTrue($file2->access('delete', $user_any));
        $this->assertFalse($file2->access('update', $user_any));
        // User with "* own files" permissions should access only own files.
        $this->assertFalse($file1->access('delete', $user_own));
        $this->assertFalse($file1->access('update', $user_own));
        $this->assertTrue($file2->access('delete', $user_own));
        $this->assertTrue($file2->access('update', $user_own));
        // Ensure cacheability metadata is correct.
        
        /** @var \Drupal\Core\Access\AccessResult $access */
        $access = $file2->access('delete', $user_any, TRUE);
        $this->assertSame([
            'user.permissions',
        ], $access->getCacheContexts());
        $this->assertSame([], $access->getCacheTags());
        
        /** @var \Drupal\Core\Access\AccessResult $access */
        $access = $file2->access('delete', $user_own, TRUE);
        $this->assertSame([
            'user.permissions',
            'user',
        ], $access->getCacheContexts());
        $this->assertSame([
            'file:2',
        ], $access->getCacheTags());
        
        /** @var \Drupal\Core\Access\AccessResult $access */
        $access = $file2->access('update', $user_any, TRUE);
        $this->assertSame([], $access->getCacheContexts());
        $this->assertSame([], $access->getCacheTags());
        
        /** @var \Drupal\Core\Access\AccessResult $access */
        $access = $file2->access('update', $user_own, TRUE);
        $this->assertSame([], $access->getCacheContexts());
        $this->assertSame([], $access->getCacheTags());
        // User without permissions should not be able to delete files even if they
        // are the owner.
        $user_none = $this->createUser();
        $file3 = File::create([
            'uid' => $user_none->id(),
            'filename' => 'druplicon.txt',
            'filemime' => 'text/plain',
        ]);
        $this->assertFalse($file3->access('delete', $user_none));
        $this->assertTrue($file3->access('update', $user_none));
        // Create a file with no user entity.
        $file4 = File::create([
            'filename' => 'druplicon.txt',
            'filemime' => 'text/plain',
        ]);
        $this->assertFalse($file4->access('delete', $user_own));
        $this->assertFalse($file4->access('update', $user_own));
        $this->assertTrue($file4->access('delete', $user_any));
        $this->assertFalse($file4->access('update', $user_any));
    }
    
    /**
     * Tests file entity field access.
     *
     * @see \Drupal\file\FileAccessControlHandler::checkFieldAccess()
     */
    public function testCheckFieldAccess() : void {
        $this->setUpCurrentUser();
        
        /** @var \Drupal\file\FileInterface $file */
        $file = File::create([
            'uri' => 'public://test.png',
        ]);
        // While creating a file entity access will be allowed for create-only
        // fields.
        $this->assertTrue($file->get('uri')
            ->access('edit'));
        $this->assertTrue($file->get('filemime')
            ->access('edit'));
        $this->assertTrue($file->get('filesize')
            ->access('edit'));
        // Access to the status field is denied whilst creating a file entity.
        $this->assertFalse($file->get('status')
            ->access('edit'));
        $file->save();
        // After saving the entity is no longer new and, therefore, access to
        // create-only fields and the status field will be denied.
        $this->assertFalse($file->get('uri')
            ->access('edit'));
        $this->assertFalse($file->get('filemime')
            ->access('edit'));
        $this->assertFalse($file->get('filesize')
            ->access('edit'));
        $this->assertFalse($file->get('status')
            ->access('edit'));
    }
    
    /**
     * Tests create access is always denied even for user 1.
     *
     * @see \Drupal\file\FileAccessControlHandler::checkCreateAccess()
     */
    public function testCreateAccess() : void {
        $user1 = $this->createUser([
            'delete own files',
        ]);
        $this->assertSame('1', $user1->id());
        $file = File::create([
            'uid' => $user1->id(),
            'filename' => 'druplicon.txt',
            'filemime' => 'text/plain',
        ]);
        $this->assertFalse($file->access('create'));
        \Drupal::currentUser()->setAccount($user1);
        $this->assertFalse($file->access('create'));
    }
    
    /**
     * Tests cacheability metadata.
     */
    public function testFileCacheability() : void {
        $file = File::create([
            'filename' => 'green-scarf',
            'uri' => 'private://green-scarf',
            'filemime' => 'text/plain',
        ]);
        $file->setPermanent();
        $file->save();
        \Drupal::service('session')->set('anonymous_allowed_file_ids', [
            $file->id() => $file->id(),
        ]);
        $account = User::getAnonymousUser();
        $file->setOwnerId($account->id())
            ->save();
        $this->assertSame([
            'session',
            'user',
        ], $file->access('view', $account, TRUE)
            ->getCacheContexts());
        $this->assertSame([
            'session',
            'user',
        ], $file->access('download', $account, TRUE)
            ->getCacheContexts());
        $account = $this->createUser();
        $file->setOwnerId($account->id())
            ->save();
        $this->assertSame([
            'user',
        ], $file->access('view', $account, TRUE)
            ->getCacheContexts());
        $this->assertSame([
            'user',
        ], $file->access('download', $account, TRUE)
            ->getCacheContexts());
    }

}