.gitignore

@@ -42,3 +42,6 @@ app.*.map.json
 /android/app/debug
 /android/app/profile
 /android/app/release
+
+# Custom ignores
+deploy-web.sh

lib/api/register.dart

@@ -1,3 +1,4 @@
+import 'package:shared_preferences/shared_preferences.dart';
 import 'package:uuid/uuid.dart';
 
 class PlayerInfo {
@@ -25,6 +26,42 @@ class PlayerInfo {
         'lobbyID': lobbyID,
         'passphrase': passphrase,
       };
+
+  void store() async {
+    final SharedPreferences prefs = await SharedPreferences.getInstance();
+
+    await prefs.setBool("contains", true);
+    await prefs.setString("playerID", playerID.toString());
+    await prefs.setString("lobbyID", lobbyID.toString());
+    await prefs.setString("passphrase", passphrase.toString());
+  }
+
+  void delete() async {
+    final SharedPreferences prefs = await SharedPreferences.getInstance();
+
+    await prefs.setBool("contains", false);
+  }
+
+  Future<PlayerInfo?> get() async {
+    final SharedPreferences prefs = await SharedPreferences.getInstance();
+    var contains = prefs.getBool("contains");
+    var playerID = prefs.getString("playerID");
+    var lobbyID = prefs.getString("lobbyID");
+    var passphrase = prefs.getString("passphrase");
+
+    if (contains == null ||
+        !contains ||
+        playerID == null ||
+        lobbyID == null ||
+        passphrase == null) {
+      return null;
+    }
+
+    return PlayerInfo(
+        playerID: UuidValue.fromString(playerID),
+        lobbyID: UuidValue.fromString(lobbyID),
+        passphrase: passphrase);
+  }
 }
 
 class WebsocketMessageIdentifyPlayer {

lib/pages/chess_game.dart

@@ -85,4 +85,18 @@ class ChessGameArguments {
     required this.playerID,
     required this.passphrase,
   });
+
+  bool isValid() {
+    try {
+      lobbyID.validate();
+      playerID.validate();
+    } catch (e) {
+      return false;
+    }
+
+    if (passphrase == null) return false;
+    if (passphrase!.isEmpty) return false;
+
+    return true;
+  }
 }

lib/pages/host_game.dart

@@ -26,6 +26,9 @@ class _HostGameWidgetState extends State<HostGameWidget> {
   @override
   void initState() {
     registerResponse = hostPrivateGame();
+    registerResponse.then((value) {
+      value?.store();
+    });
     connectToWebsocket(registerResponse);
 
     super.initState();

lib/pages/join_game.dart

@@ -1,118 +0,0 @@
-import 'dart:convert';
-import 'dart:developer';
-
-import 'package:flutter/foundation.dart';
-import 'package:flutter/material.dart';
-import 'package:go_router/go_router.dart';
-import 'package:http/http.dart' as http;
-import 'package:http/http.dart';
-import 'package:mchess/api/register.dart';
-import 'package:mchess/connection_cubit/connection_cubit.dart';
-import 'package:mchess/pages/chess_game.dart';
-
-class JoinGameWidget extends StatefulWidget {
-  const JoinGameWidget({
-    super.key,
-  });
-
-  @override
-  State<JoinGameWidget> createState() => _JoinGameWidgetState();
-}
-
-class _JoinGameWidgetState extends State<JoinGameWidget> {
-  final myController = TextEditingController();
-  late Future<PlayerInfo?> joinGameFuture;
-
-  @override
-  void initState() {
-    super.initState();
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    return Scaffold(
-      body: TextField(
-        controller: myController,
-        decoration: InputDecoration(
-            hintText: 'Enter passphrase here',
-            suffixIcon: IconButton(
-              onPressed: () {
-                joinGameFuture = joinPrivateGame();
-                switchToGame(joinGameFuture);
-              },
-              icon: const Icon(Icons.check),
-            )),
-      ),
-      floatingActionButton: FloatingActionButton(
-        onPressed: () {
-          context.push('/');
-        },
-        child: const Icon(Icons.cancel),
-      ),
-    );
-  }
-
-  void switchToGame(Future<PlayerInfo?> resp) {
-    resp.then((value) {
-      if (value == null) return;
-
-      var chessGameArgs = ChessGameArguments(
-          lobbyID: value.lobbyID!,
-          playerID: value.playerID!,
-          passphrase: value.passphrase);
-
-      ConnectionCubit.getInstance().connect(
-        value.playerID!.uuid,
-        value.lobbyID!.uuid,
-        value.passphrase,
-      );
-
-      context.push('/game', extra: chessGameArgs);
-    });
-  }
-
-  Future<PlayerInfo?> joinPrivateGame() async {
-    String addr;
-    Response response;
-
-    // server expects us to send the passphrase
-    var info = PlayerInfo(
-        playerID: null, lobbyID: null, passphrase: myController.text);
-
-    if (kDebugMode) {
-      addr = 'http://localhost:8080/api/joinPrivate';
-    } else {
-      addr = 'https://chess.sw-gross.de:9999/api/joinPrivate';
-    }
-
-    try {
-      response = await http.post(Uri.parse(addr),
-          body: jsonEncode(info), headers: {"Accept": "application/json"});
-    } catch (e) {
-      log(e.toString());
-
-      if (!context.mounted) return null;
-
-      const snackBar = SnackBar(
-        backgroundColor: Colors.amberAccent,
-        content: Text("mChess server is not responding. Try again or give up"),
-      );
-      Future.delayed(const Duration(seconds: 2), () {
-        ScaffoldMessenger.of(context).clearSnackBars();
-        ScaffoldMessenger.of(context).showSnackBar(snackBar);
-        context.push('/'); // We go back to lobby selector
-      });
-      return null;
-    }
-
-    if (response.statusCode == 200) {
-      var info = PlayerInfo.fromJson(jsonDecode(response.body));
-      log('Player info received from server: ');
-      log('lobbyID: ${info.lobbyID}');
-      log('playerID: ${info.playerID}');
-      log('passphrase: ${info.passphrase}');
-      return info;
-    }
-    return null;
-  }
-}

lib/pages/lobby_selector.dart

@@ -1,13 +1,36 @@
+import 'dart:convert';
+import 'dart:developer';
+
+import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:go_router/go_router.dart';
+import 'package:http/http.dart' as http;
+import 'package:mchess/api/register.dart';
+import 'package:mchess/connection_cubit/connection_cubit.dart';
+import 'package:mchess/pages/chess_game.dart';
+import 'package:shared_preferences/shared_preferences.dart';
 
-class LobbySelector extends StatelessWidget {
+class LobbySelector extends StatefulWidget {
   const LobbySelector({super.key});
 
+  @override
+  State<LobbySelector> createState() => _LobbySelectorState();
+}
+
+class _LobbySelectorState extends State<LobbySelector> {
   final buttonStyle = const ButtonStyle();
+  final myController = TextEditingController();
+  late Future<PlayerInfo?> joinGameFuture;
 
   @override
   Widget build(BuildContext context) {
+    SharedPreferences.getInstance().then((prefs) {
+      final playerID = prefs.getString("playerID");
+      final lobbyID = prefs.getString("lobbyID");
+      final passphrase = prefs.getString("passphrase");
+      log("lobbyID: $lobbyID and playerID: $playerID and passphrase: $passphrase");
+    });
+
     return Scaffold(
       body: Center(
         child: Column(
@@ -15,7 +38,7 @@ class LobbySelector extends StatelessWidget {
           children: [
             ElevatedButton(
               onPressed: () {
-                _dialogBuilder(context);
+                buildJoinOrHostDialog(context);
               },
               child: const Row(
                 mainAxisSize: MainAxisSize.min,
@@ -34,23 +57,65 @@ class LobbySelector extends StatelessWidget {
     );
   }
 
-  Future<void> _dialogBuilder(BuildContext context) {
+  Future<void> buildJoinOrHostDialog(BuildContext context) {
+    return showDialog<void>(
+      context: context,
+      builder: (BuildContext context) {
+        return Scaffold(
+          body: AlertDialog(
+            title: const Text('Host or join?'),
+            actions: <Widget>[
+              TextButton(
+                child: const Text('Cancel'),
+                onPressed: () {
+                  context.pop();
+                },
+              ),
+              TextButton(
+                child: const Text('Host'),
+                onPressed: () {
+                  context.push('/host');
+                },
+              ),
+              TextButton(
+                child: const Text('Join'),
+                onPressed: () {
+                  buildEnterPassphraseDialog(context);
+                },
+              ),
+            ],
+          ),
+        );
+      },
+    );
+  }
+
+  Future<void> buildEnterPassphraseDialog(BuildContext context) {
     return showDialog<void>(
       context: context,
       builder: (BuildContext context) {
         return AlertDialog(
-          title: const Text('Host or join?'),
+          title: const Text('Enter the passphrase here:'),
+          content: TextField(
+            controller: myController,
+            decoration: InputDecoration(
+                hintText: 'Enter passphrase here',
+                suffixIcon: IconButton(
+                  onPressed: () {
+                    joinGameFuture = joinPrivateGame();
+                    joinGameFuture.then((value) {
+                      if (value == null) return;
+                      switchToGame(value);
+                    });
+                  },
+                  icon: const Icon(Icons.check),
+                )),
+          ),
           actions: <Widget>[
             TextButton(
-              child: const Text('Host'),
+              child: const Text('Cancel'),
               onPressed: () {
-                context.push('/host');
+                context.pop();
-              },
-            ),
-            TextButton(
-              child: const Text('Join'),
-              onPressed: () {
-                context.push('/join');
               },
             ),
           ],
@@ -58,4 +123,73 @@ class LobbySelector extends StatelessWidget {
       },
     );
   }
+
+  void switchToGame(PlayerInfo info) {
+    var chessGameArgs = ChessGameArguments(
+        lobbyID: info.lobbyID!,
+        playerID: info.playerID!,
+        passphrase: info.passphrase);
+
+    ConnectionCubit.getInstance().connect(
+      info.playerID!.uuid,
+      info.lobbyID!.uuid,
+      info.passphrase,
+    );
+
+    if (!chessGameArgs.isValid()) {
+      context.push('/');
+      const snackBar = SnackBar(
+        backgroundColor: Colors.amberAccent,
+        content: Text("Game information is corrupted"),
+      );
+      ScaffoldMessenger.of(context).clearSnackBars();
+      ScaffoldMessenger.of(context).showSnackBar(snackBar);
+    }
+
+    context.push('/game', extra: chessGameArgs);
+  }
+
+  Future<PlayerInfo?> joinPrivateGame() async {
+    String addr;
+    http.Response response;
+
+    // server expects us to send the passphrase
+    var info = PlayerInfo(
+        playerID: null, lobbyID: null, passphrase: myController.text);
+
+    if (kDebugMode) {
+      addr = 'http://localhost:8080/api/joinPrivate';
+    } else {
+      addr = 'https://chess.sw-gross.de:9999/api/joinPrivate';
+    }
+
+    try {
+      response = await http.post(Uri.parse(addr),
+          body: jsonEncode(info), headers: {"Accept": "application/json"});
+    } catch (e) {
+      log(e.toString());
+
+      if (!context.mounted) return null;
+
+      const snackBar = SnackBar(
+        backgroundColor: Colors.amberAccent,
+        content: Text("mChess server is not responding. Try again or give up"),
+      );
+      ScaffoldMessenger.of(context).clearSnackBars();
+      ScaffoldMessenger.of(context).showSnackBar(snackBar);
+      return null;
+    }
+
+    if (response.statusCode == 200) {
+      var info = PlayerInfo.fromJson(jsonDecode(response.body));
+      log('Player info received from server: ');
+      log('lobbyID: ${info.lobbyID}');
+      log('playerID: ${info.playerID}');
+      log('passphrase: ${info.passphrase}');
+
+      return info;
+    }
+
+    return null;
+  }
 }

lib/utils/chess_router.dart

@@ -1,6 +1,5 @@
 import 'package:go_router/go_router.dart';
 import 'package:mchess/pages/chess_game.dart';
-import 'package:mchess/pages/join_game.dart';
 import 'package:mchess/pages/lobby_selector.dart';
 import 'package:mchess/pages/host_game.dart';
 import 'package:mchess/pages/prepare_random_game.dart';
@@ -35,12 +34,6 @@ class ChessAppRouter {
           builder: (context, state) {
             return const HostGameWidget();
           }),
-      GoRoute(
-          path: '/join',
-          name: 'join',
-          builder: (context, state) {
-            return const JoinGameWidget();
-          }),
       GoRoute(
         path: '/game',
         name: 'game',

macos/Flutter/GeneratedPluginRegistrant.swift

@@ -5,6 +5,8 @@
 import FlutterMacOS
 import Foundation
 
+import shared_preferences_foundation
 
 func RegisterGeneratedPlugins(registry: FlutterPluginRegistry) {
+  SharedPreferencesPlugin.register(with: registry.registrar(forPlugin: "SharedPreferencesPlugin"))
 }

pubspec.lock

@@ -81,6 +81,22 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.3.1"
+  ffi:
+    dependency: transitive
+    description:
+      name: ffi
+      sha256: "7bf0adc28a23d395f19f3f1eb21dd7cfd1dd9f8e1c50051c069122e6853bc878"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.0"
+  file:
+    dependency: transitive
+    description:
+      name: file
+      sha256: "5fc22d7c25582e38ad9a8515372cd9a93834027aacf1801cf01164dac0ffa08c"
+      url: "https://pub.dev"
+    source: hosted
+    version: "7.0.0"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -208,6 +224,30 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.0.1"
+  path_provider_linux:
+    dependency: transitive
+    description:
+      name: path_provider_linux
+      sha256: f7a1fe3a634fe7734c8d3f2766ad746ae2a2884abe22e241a8b301bf5cac3279
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.2.1"
+  path_provider_platform_interface:
+    dependency: transitive
+    description:
+      name: path_provider_platform_interface
+      sha256: "94b1e0dd80970c1ce43d5d4e050a9918fce4f4a775e6142424c30a29a363265c"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.1"
+  path_provider_windows:
+    dependency: transitive
+    description:
+      name: path_provider_windows
+      sha256: "8bc9f22eee8690981c22aa7fc602f5c85b497a6fb2ceb35ee5a5e5ed85ad8170"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.2.1"
   petitparser:
     dependency: transitive
     description:
@@ -216,6 +256,22 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "6.0.2"
+  platform:
+    dependency: transitive
+    description:
+      name: platform
+      sha256: "0a279f0707af40c890e80b1e9df8bb761694c074ba7e1d4ab1bc4b728e200b59"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.1.3"
+  plugin_platform_interface:
+    dependency: transitive
+    description:
+      name: plugin_platform_interface
+      sha256: f4f88d4a900933e7267e2b353594774fc0d07fb072b47eedcd5b54e1ea3269f8
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.7"
   provider:
     dependency: transitive
     description:
@@ -232,6 +288,62 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "3.2.1"
+  shared_preferences:
+    dependency: "direct main"
+    description:
+      name: shared_preferences
+      sha256: "81429e4481e1ccfb51ede496e916348668fd0921627779233bd24cc3ff6abd02"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.2.2"
+  shared_preferences_android:
+    dependency: transitive
+    description:
+      name: shared_preferences_android
+      sha256: "8568a389334b6e83415b6aae55378e158fbc2314e074983362d20c562780fb06"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.2.1"
+  shared_preferences_foundation:
+    dependency: transitive
+    description:
+      name: shared_preferences_foundation
+      sha256: "7bf53a9f2d007329ee6f3df7268fd498f8373602f943c975598bbb34649b62a7"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.3.4"
+  shared_preferences_linux:
+    dependency: transitive
+    description:
+      name: shared_preferences_linux
+      sha256: "9f2cbcf46d4270ea8be39fa156d86379077c8a5228d9dfdb1164ae0bb93f1faa"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.3.2"
+  shared_preferences_platform_interface:
+    dependency: transitive
+    description:
+      name: shared_preferences_platform_interface
+      sha256: d4ec5fc9ebb2f2e056c617112aa75dcf92fc2e4faaf2ae999caa297473f75d8a
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.3.1"
+  shared_preferences_web:
+    dependency: transitive
+    description:
+      name: shared_preferences_web
+      sha256: "7b15ffb9387ea3e237bb7a66b8a23d2147663d391cafc5c8f37b2e7b4bde5d21"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.2.2"
+  shared_preferences_windows:
+    dependency: transitive
+    description:
+      name: shared_preferences_windows
+      sha256: "841ad54f3c8381c480d0c9b508b89a34036f512482c407e6df7a9c4aa2ef8f59"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.3.2"
   sky_engine:
     dependency: transitive
     description: flutter
@@ -305,10 +417,10 @@ packages:
     dependency: "direct main"
     description:
       name: uuid
-      sha256: df5a4d8f22ee4ccd77f8839ac7cb274ebc11ef9adcce8b92be14b797fe889921
+      sha256: "22c94e5ad1e75f9934b766b53c742572ee2677c56bc871d850a57dad0f82127f"
       url: "https://pub.dev"
     source: hosted
-    version: "4.2.1"
+    version: "4.2.2"
   vector_graphics:
     dependency: transitive
     description:
@@ -357,6 +469,22 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.4.0"
+  win32:
+    dependency: transitive
+    description:
+      name: win32
+      sha256: b0f37db61ba2f2e9b7a78a1caece0052564d1bc70668156cf3a29d676fe4e574
+      url: "https://pub.dev"
+    source: hosted
+    version: "5.1.1"
+  xdg_directories:
+    dependency: transitive
+    description:
+      name: xdg_directories
+      sha256: "589ada45ba9e39405c198fe34eb0f607cddb2108527e658136120892beac46d2"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.3"
   xml:
     dependency: transitive
     description:
@@ -367,4 +495,4 @@ packages:
     version: "6.5.0"
 sdks:
   dart: ">=3.2.0 <4.0.0"
-  flutter: ">=3.10.0"
+  flutter: ">=3.16.0"

pubspec.yaml

@@ -44,6 +44,7 @@ dependencies:
   go_router: ^12.0.0
   http: ^1.0.0
   uuid: ^4.0.0
+  shared_preferences: ^2.2.2
 
 dev_dependencies:
   flutter_test: