// Copyright (c) 2020, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

typedef UrlEncoder = Future<String> Function(String url);

/// A reader for Dart sources and related source maps.
abstract class AssetReader {
  /// Returns the contents for a source map at the provided server path, or
  /// null if the resource does not exist.
  Future<String?> sourceMapContents(String serverPath);

  /// Returns the contents for a dart source at the provided server path, or
  /// null if the resource does not exist.
  Future<String?> dartSourceContents(String serverPath);

  /// Returns the contents for the merged metadata output at the provided path,
  /// or null if the resource does not exist.
  Future<String?> metadataContents(String serverPath);

  /// Closes connections
  Future<void> close();
}