// 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)class $CLASSNAME$EXTENDS$IMPLEMENTS$NATIVESPEC {
  /**
   * Checks to see if Indexed DB is supported on the current platform.
   */
  static bool get supported {
$if DARTIUM
    return true;
$else
    return JS('bool',
        '!!(window.indexedDB || '
        'window.webkitIndexedDB || '
        'window.mozIndexedDB)');
$endif
  }

  @DomName('IDBFactory.open')
  Future<Database> open(String name,
      {int version, void onUpgradeNeeded(VersionChangeEvent),
      void onBlocked(Event)}) {
    if ((version == null) != (onUpgradeNeeded == null)) {
      return new Future.immediateError(new ArgumentError(
          'version and onUpgradeNeeded must be specified together'));
    }
    try {
      var request;
      if (version != null) {
        request = $dom_open(name, version);
      } else {
        request = $dom_open(name);
      }

      if (onUpgradeNeeded != null) {
        request.onUpgradeNeeded.listen(onUpgradeNeeded);
      }
      if (onBlocked != null) {
        request.onBlocked.listen(onBlocked);
      }
      return _completeRequest(request);
    } catch (e, stacktrace) {
      return new Future.immediateError(e, stacktrace);
    }
  }

  @DomName('IDBFactory.deleteDatabase')
  Future<IdbFactory> deleteDatabase(String name,
      {void onBlocked(Event)}) {
    try {
      var request = $dom_deleteDatabase(name);

      if (onBlocked != null) {
        request.onBlocked.listen(onBlocked);
      }
      return _completeRequest(request);
    } catch (e, stacktrace) {
      return new Future.immediateError(e, stacktrace);
    }
  }

  @DomName('IDBFactory.getDatabaseNames')
  @SupportedBrowser(SupportedBrowser.CHROME)
  @Experimental
  Future<List<String>> getDatabaseNames() {
    try {
      var request = $dom_webkitGetDatabaseNames();

      return _completeRequest(request);
    } catch (e, stacktrace) {
      return new Future.immediateError(e, stacktrace);
    }
  }

  /**
   * Checks to see if getDatabaseNames is supported by the current platform.
   */
  bool get supportsDatabaseNames {
$if DART2JS
    return supported && JS('bool',
        '!!(#.getDatabaseNames || #.webkitGetDatabaseNames)', this, this);
$else
    return true;
$endif
  }

$!MEMBERS
}


/**
 * Ties a request to a completer, so the completer is completed when it succeeds
 * and errors out when the request errors.
 */
Future _completeRequest(Request request) {
  var completer = new Completer();
  // TODO: make sure that completer.complete is synchronous as transactions
  // may be committed if the result is not processed immediately.
  request.onSuccess.listen((e) {
    completer.complete(request.result);
  });
  request.onError.listen((e) {
    completer.completeError(e);
  });
  return completer.future;
}