refactor

gui/lib/src/widget/page/backend/state_toggle.dart

@@ -0,0 +1,89 @@
+import 'dart:async';
+
+import 'package:fluent_ui/fluent_ui.dart';
+import 'package:get/get.dart';
+import 'package:reboot_common/common.dart';
+import 'package:reboot_launcher/src/controller/backend_controller.dart';
+import 'package:reboot_launcher/src/controller/game_controller.dart';
+import 'package:reboot_launcher/src/controller/hosting_controller.dart';
+import 'package:reboot_launcher/src/widget/snackbar/snackbar.dart';
+import 'package:reboot_launcher/src/widget/section/backend/message.dart';
+import 'package:reboot_launcher/src/util/translations.dart';
+
+class BackendButton extends StatefulWidget {
+  const BackendButton({Key? key}) : super(key: key);
+
+  @override
+  State<BackendButton> createState() => _BackendButtonState();
+}
+
+class _BackendButtonState extends State<BackendButton> {
+  final GameController _gameController = Get.find<GameController>();
+  final HostingController _hostingController = Get.find<HostingController>();
+  final BackendController _backendController = Get.find<BackendController>();
+  final StreamController<void> _textController = StreamController.broadcast();
+  late final void Function() _listener = () => _textController.add(null);
+
+  @override
+  void initState() {
+    _backendController.port.addListener(_listener);
+    super.initState();
+  }
+
+  @override
+  void dispose() {
+    _backendController.port.removeListener(_listener);
+    _textController.close();
+    super.dispose();
+  }
+
+  @override
+  Widget build(BuildContext context) => Align(
+      alignment: AlignmentDirectional.bottomCenter,
+      child: SizedBox(
+          height: 48,
+          width: double.infinity,
+          child: Button(
+              child: Align(
+                alignment: Alignment.center,
+                child: StreamBuilder(
+                    stream: _textController.stream,
+                    builder: (context, snapshot) => Obx(() => Text(_text))
+                ),
+              ),
+              onPressed: () => _backendController.toggle(
+                  eventHandler: _onEvent,
+                  errorHandler: _onError
+              )
+          )
+      )
+  );
+
+  SnackBar? _onEvent(AuthBackendType type, AuthBackendEvent event) {
+    _backendController.started.value = event.type.isStart && !event.type.isError;
+    if(event.type == AuthBackendEventType.startedImplementation) {
+      _backendController.implementation = event.implementation;
+    }
+    return onBackendResult(type, event);
+  }
+
+  void _onError(String error) {
+    if(_backendController.started.value) {
+      _backendController.stop();
+      _gameController.instance.value?.kill();
+      _hostingController.instance.value?.kill();
+      onBackendError(error);
+    }
+  }
+  
+  String get _text {
+    if(_backendController.type.value == AuthBackendType.local
+        && _backendController.port.text.trim() == kDefaultBackendPort.toString()){
+      return translations.checkServer;
+    }else if(_backendController.started.value){
+      return translations.stopServer;
+    }else {
+      return translations.startServer;
+    }
+  }
+}