| // Copyright (c) 2022, 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. |
| |
| @JS() |
| library messaging; |
| |
| import 'dart:async'; |
| import 'dart:convert'; |
| |
| import 'package:js/js.dart'; |
| |
| import 'chrome_api.dart'; |
| import 'data_serializers.dart'; |
| import 'logger.dart'; |
| |
| enum Script { |
| background, |
| debuggerPanel, |
| detector; |
| |
| factory Script.fromString(String value) { |
| return Script.values.byName(value); |
| } |
| } |
| |
| enum MessageType { |
| isAuthenticated, |
| connectFailure, |
| debugInfo, |
| debugStateChange, |
| devToolsUrl, |
| multipleAppsDetected; |
| |
| factory MessageType.fromString(String value) { |
| return MessageType.values.byName(value); |
| } |
| } |
| |
| class Message { |
| final Script to; |
| final Script from; |
| final MessageType type; |
| final String body; |
| final String? error; |
| |
| Message({ |
| required this.to, |
| required this.from, |
| required this.type, |
| required this.body, |
| this.error, |
| }); |
| |
| factory Message.fromJSON(String json) { |
| final decoded = jsonDecode(json) as Map<String, dynamic>; |
| |
| return Message( |
| to: Script.fromString(decoded['to'] as String), |
| from: Script.fromString(decoded['from'] as String), |
| type: MessageType.fromString(decoded['type'] as String), |
| body: decoded['body'] as String, |
| error: decoded['error'] as String?, |
| ); |
| } |
| |
| String toJSON() { |
| return jsonEncode({ |
| 'to': to.name, |
| 'from': from.name, |
| 'type': type.name, |
| 'body': body, |
| if (error != null) 'error': error, |
| }); |
| } |
| } |
| |
| void interceptMessage<T>({ |
| required String? message, |
| required MessageType expectedType, |
| required Script expectedSender, |
| required Script expectedRecipient, |
| required void Function(T message) messageHandler, |
| }) { |
| if (message == null) return; |
| try { |
| final decodedMessage = Message.fromJSON(message); |
| if (decodedMessage.type != expectedType || |
| decodedMessage.to != expectedRecipient || |
| decodedMessage.from != expectedSender) { |
| return; |
| } |
| if (T == String) { |
| messageHandler(decodedMessage.body as T); |
| } else { |
| messageHandler( |
| serializers.deserialize(jsonDecode(decodedMessage.body)) as T); |
| } |
| } catch (error) { |
| debugError( |
| 'Error intercepting $expectedType from $expectedSender to $expectedRecipient: $error'); |
| } |
| } |
| |
| Future<bool> sendRuntimeMessage( |
| {required MessageType type, |
| required String body, |
| required Script sender, |
| required Script recipient}) { |
| final message = Message( |
| to: recipient, |
| from: sender, |
| type: type, |
| body: body, |
| ); |
| final completer = Completer<bool>(); |
| chrome.runtime.sendMessage( |
| /*id*/ null, |
| message.toJSON(), |
| /*options*/ null, |
| allowInterop(() { |
| final error = chrome.runtime.lastError; |
| if (error != null) { |
| debugError( |
| 'Error sending $type to $recipient from $sender: ${error.message}'); |
| } |
| completer.complete(error != null); |
| }), |
| ); |
| return completer.future; |
| } |