flutter: Replace sentry by catcher and remove all try...catch...

src/ui/flutter/lib/common/profile.dart

@@ -44,13 +44,8 @@ class Profile {
   Future<bool> commit() async {
     _file.create(recursive: true);
 
-    try {
     final contents = jsonEncode(_values);
     await _file.writeAsString(contents);
-    } catch (e) {
-      print('Error: $e');
-      return false;
-    }
 
     return true;
   }
@@ -59,12 +54,8 @@ class Profile {
     final docDir = await getApplicationDocumentsDirectory();
     _file = File('${docDir.path}/$fileName');
 
-    try {
     final contents = await _file.readAsString();
     _values = jsonDecode(contents);
-    } catch (e) {
-      return false;
-    }
 
     return true;
   }

src/ui/flutter/lib/engine/native_engine.dart

@@ -27,60 +27,29 @@ class NativeEngine extends AiEngine {
   static const platform = const MethodChannel('com.calcitem.sanmill/engine');
 
   Future<void> startup() async {
-    try {
     await platform.invokeMethod('startup');
-    } catch (e) {
-      print('Native startup Error: $e');
-    }
-
     await waitResponse(['uciok'], sleep: 1, times: 30);
   }
 
   Future<void> send(String command) async {
-    try {
     print("send: $command");
     await platform.invokeMethod('send', command);
-    } catch (e) {
-      print('Native sendCommand Error: $e');
-    }
   }
 
   Future<String> read() async {
-    try {
     return await platform.invokeMethod('read');
-    } catch (e) {
-      print('Native readResponse Error: $e');
-    }
-
-    return null;
   }
 
   Future<void> shutdown() async {
-    try {
     await platform.invokeMethod('shutdown');
-    } catch (e) {
-      print('Native shutdown Error: $e');
-    }
   }
 
   Future<bool> isReady() async {
-    try {
     return await platform.invokeMethod('isReady');
-    } catch (e) {
-      print('Native readResponse Error: $e');
-    }
-
-    return null;
   }
 
   Future<bool> isThinking() async {
-    try {
     return await platform.invokeMethod('isThinking');
-    } catch (e) {
-      print('Native readResponse Error: $e');
-    }
-
-    return null;
   }
 
   @override

src/ui/flutter/lib/main.dart

@@ -18,29 +18,62 @@
 
 import 'dart:io';
 
-import 'package:flutter/foundation.dart';
+import 'package:catcher/catcher.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:flutter_localizations/flutter_localizations.dart';
+import 'package:path_provider/path_provider.dart';
 import 'package:sanmill/generated/l10n.dart';
-import 'package:sentry_flutter/sentry_flutter.dart';
 
 import 'services/audios.dart';
 import 'services/player.dart';
 import 'widgets/main_menu.dart';
 
 Future<void> main() async {
-  if (kReleaseMode) {
+  var catcher = Catcher(rootWidget: SanmillApp(), ensureInitialized: true);
-    await SentryFlutter.init(
+
-      (options) {
+  //DateTime now = DateTime.now();
-        options.dsn =
+  //String formattedDate = DateFormat('yyyy-MM-dd_kk-mm').format(now);
-            'https://62c565096ba146a6b70bc57dbb72386c@o525088.ingest.sentry.io/5638585';
+  Directory externalDir = await getExternalStorageDirectory();
-      },
+  String path = externalDir.path.toString() + "/sanmill-crash-logs.txt";
-      appRunner: () => runApp(SanmillApp()),
+  print("ExternalStorageDirectory: " + externalDir.path.toString());
+  String recipients = "calcitem@outlook.com";
+
+  /// Create catcher configuration.
+  /// Debug configuration with dialog report mode and console handler.
+  /// It will show dialog and once user accepts it, error will be shown
+  /// in console.
+  //CatcherOptions debugOptions = CatcherOptions(
+  //    PageReportMode(showStackTrace: true), [ConsoleHandler()]);
+  CatcherOptions debugOptions =
+      CatcherOptions(PageReportMode(showStackTrace: true), [
+    ConsoleHandler(),
+    FileHandler(File(path), printLogs: true),
+    EmailManualHandler([recipients], printLogs: true)
+  ]);
+
+  /// Release configuration.
+  /// Same as above, but once user accepts dialog,
+  /// user will be prompted to send email with crash to support.
+  CatcherOptions releaseOptions =
+      CatcherOptions(PageReportMode(showStackTrace: true), [
+    FileHandler(File(path), printLogs: true),
+    EmailManualHandler([recipients], printLogs: true)
+  ]);
+
+  CatcherOptions profileOptions =
+      CatcherOptions(PageReportMode(showStackTrace: true), [
+    ConsoleHandler(),
+    FileHandler(File(path), printLogs: true),
+    EmailManualHandler([recipients], printLogs: true)
+  ]);
+
+  /// Pass root widget (MyApp) along with Catcher configuration:
+  catcher.updateConfig(
+    debugConfig: debugOptions,
+    releaseConfig: releaseOptions,
+    profileConfig: profileOptions,
   );
-  } else {
-    runApp(SanmillApp());
-  }
 
   SystemChrome.setPreferredOrientations(
     [DeviceOrientation.portraitUp, DeviceOrientation.portraitDown],
@@ -70,14 +103,15 @@ class _SanmillAppState extends State<SanmillApp> {
   @override
   void initState() {
     super.initState();
-    //Audios.loopBgm('bg_music.mp3');
     Player.loadProfile();
   }
 
   @override
   Widget build(BuildContext context) {
-    //
     return MaterialApp(
+      /// Add navigator key from Catcher.
+      /// It will be used to navigate user to report page or to show dialog.
+      navigatorKey: Catcher.navigatorKey,
       navigatorObservers: [routeObserver],
       localizationsDelegates: [
         // ... app-specific localization delegate[s] here

src/ui/flutter/lib/services/audios.dart

@@ -26,19 +26,15 @@ class Audios {
   static AudioCache _bgmPlayer, _tonePlayer;
 
   static loopBgm(String fileName) async {
-    //
-    try {
     if (_bgmPlayer == null) {
       _fixedBgmPlayer = AudioPlayer();
-        _bgmPlayer =
+      _bgmPlayer = AudioCache(prefix: 'audios/', fixedPlayer: _fixedBgmPlayer);
-            AudioCache(prefix: 'audios/', fixedPlayer: _fixedBgmPlayer);
 
       //await _bgmPlayer.loadAll(['bg_music.mp3']);
     }
 
     _fixedBgmPlayer.stop();
     _bgmPlayer.loop(fileName);
-    } catch (e) {}
   }
 
   static playTone(String fileName) async {
@@ -46,7 +42,6 @@ class Audios {
       return;
     }
 
-    try {
     if (_tonePlayer == null) {
       //
       _fixedTonePlayer = AudioPlayer();
@@ -72,23 +67,18 @@ class Audios {
     await _fixedTonePlayer.seek(Duration.zero);
     //await release();
     await _tonePlayer.play(fileName);
-    } catch (e) {}
   }
 
   static stopBgm() {
-    try {
     if (_fixedBgmPlayer != null) _fixedBgmPlayer.stop();
-    } catch (e) {}
   }
 
   static Future<void> release() async {
-    try {
     if (_fixedBgmPlayer != null) {
       await _fixedBgmPlayer.release();
     }
     if (_fixedTonePlayer != null) {
       await _fixedTonePlayer.release();
     }
-    } catch (e) {}
   }
 }

src/ui/flutter/lib/widgets/game_page.dart

@@ -285,13 +285,6 @@ class _GamePageState extends State<GamePage> with RouteAware {
         msg: S.of(context).analyzing, position: ToastPostion.bottom);
 
     setState(() => _searching = true);
-
-    try {} catch (e) {
-      Toast.toast(context,
-          msg: S.of(context).error + ": $e", position: ToastPostion.bottom);
-    } finally {
-      setState(() => _searching = false);
-    }
   }
 
   showAnalyzeItems(

src/ui/flutter/lib/widgets/main_menu.dart

@@ -58,17 +58,13 @@ class _MainMenuState extends State<MainMenu> with TickerProviderStateMixin {
       if (status == AnimationStatus.completed) shadowController.reverse();
     });
 
-    /// use 'try...catch' to avoid exception -
+    /// TODO: use 'try...catch' to avoid exception -
     /// 'setState() or markNeedsBuild() called during build.'
     inAnimation.addListener(() {
-      try {
       setState(() {});
-      } catch (e) {}
     });
     shadowAnimation.addListener(() {
-      try {
       setState(() {});
-      } catch (e) {}
     });
 
     inController.forward();

src/ui/flutter/pubspec.yaml

@@ -19,7 +19,7 @@ dependencies:
   url_launcher: ^5.7.10
   intl: ^0.16.1
   flutter_socket_io: ^0.6.0
-  sentry_flutter: ^4.0.4
+  catcher: ^0.4.1
 
 dev_dependencies:
   flutter_test: