// Copyright (c) 2012, 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.

part of $LIBRARYNAME;

$(ANNOTATIONS)$(NATIVESPEC)$(CLASS_MODIFIERS)class $CLASSNAME$EXTENDS$IMPLEMENTS {
$!MEMBERS
  factory Blob(List blobParts, [String$NULLABLE type,
      String$NULLABLE endings]) {
    // TODO: validate that blobParts is a JS Array and convert if not.
    // TODO: any coercions on the elements of blobParts, e.g. coerce a typed
    // array to ArrayBuffer if it is a total view.
    if (type == null && endings == null) {
      return _create_1(blobParts);
    }
    var bag = _create_bag();
    if (type != null) _bag_set(bag, 'type', type);
    if (endings != null) _bag_set(bag, 'endings', endings);
    return _create_2(blobParts, bag);
  }

  static _create_1(parts) => JS('Blob', 'new self.Blob(#)', parts);
  static _create_2(parts, bag) => JS('Blob', 'new self.Blob(#, #)', parts, bag);

  static _create_bag() => JS('var', '{}');
  static _bag_set(bag, key, value) { JS('void', '#[#] = #', bag, key, value); }
}