Fix snackbar in host/join dialog

lib/pages/lobby_selector.dart

@@ -1,5 +1,6 @@
 import 'dart:convert';
 import 'dart:developer';
+import 'dart:io';
 
 import 'package:flutter/material.dart';
 import 'package:go_router/go_router.dart';
@@ -58,26 +59,27 @@ class _LobbySelectorState extends State<LobbySelector> {
   Future<void> buildJoinOrHostDialog(BuildContext context) {
     return showDialog<void>(
       context: context,
-      builder: (BuildContext context) {
+      builder: (BuildContext builderContext) {
         return Scaffold(
           body: AlertDialog(
             title: const Text('Host or join?'),
             actions: <Widget>[
               TextButton(
                 child: const Text('Cancel'),
-                onPressed: () => context.pop(),
+                onPressed: () => builderContext.pop(),
               ),
               TextButton(
                   child: const Text('Host'),
                   onPressed: () {
-                    context.pop(); //close dialog before going to host
+                    builderContext.pop(); //close dialog before going to host
-                    context.goNamed('host');
+                    builderContext.goNamed('host');
                   }),
               TextButton(
                 child: const Text('Join'),
                 onPressed: () {
-                  context.pop(); //close dialog before going to next dialog
+                  builderContext
-                  buildEnterPassphraseDialog(context);
+                      .pop(); //close dialog before going to next dialog
+                  buildEnterPassphraseDialog(builderContext);
                 },
               ),
             ],
@@ -91,7 +93,11 @@ class _LobbySelectorState extends State<LobbySelector> {
     return showDialog<void>(
       context: context,
       builder: (BuildContext context) {
-        return AlertDialog(
+        return ScaffoldMessenger(
+          child: Builder(builder: (builderContext) {
+            return Scaffold(
+              backgroundColor: Colors.transparent,
+              body: AlertDialog(
                 title: const Text('Enter the passphrase here:'),
                 content: TextField(
                   controller: phraseController,
@@ -99,11 +105,11 @@ class _LobbySelectorState extends State<LobbySelector> {
                       hintText: 'Enter passphrase here',
                       suffixIcon: IconButton(
                         onPressed: () {
-                    joinGameFuture = joinPrivateGame();
+                          joinGameFuture = joinPrivateGame(builderContext);
                           joinGameFuture.then((value) {
                             if (value != null) {
                               phraseController.clear();
-                        context.pop();
+                              builderContext.pop();
                               switchToGame(value);
                             }
                           });
@@ -115,10 +121,13 @@ class _LobbySelectorState extends State<LobbySelector> {
                   TextButton(
                     child: const Text('Cancel'),
                     onPressed: () {
-                context.pop();
+                      builderContext.pop();
                     },
                   ),
                 ],
+              ),
+            );
+          }),
         );
       },
     );
@@ -144,12 +153,14 @@ class _LobbySelectorState extends State<LobbySelector> {
       );
       ScaffoldMessenger.of(context).clearSnackBars();
       ScaffoldMessenger.of(context).showSnackBar(snackBar);
+
+      return;
     }
 
     context.goNamed('game', extra: chessGameArgs);
   }
 
-  Future<PlayerInfo?> joinPrivateGame() async {
+  Future<PlayerInfo?> joinPrivateGame(BuildContext context) async {
     http.Response response;
 
     // server expects us to send the passphrase
@@ -168,14 +179,25 @@ class _LobbySelectorState extends State<LobbySelector> {
         backgroundColor: Colors.amberAccent,
         content: Text("mChess server is not responding. Try again or give up"),
       );
-      if (mounted) {
       ScaffoldMessenger.of(context).clearSnackBars();
       ScaffoldMessenger.of(context).showSnackBar(snackBar);
-      }
       return null;
     }
 
-    if (response.statusCode == 200) {
+    if (response.statusCode == HttpStatus.notFound) {
+      const snackBar = SnackBar(
+        backgroundColor: Colors.amberAccent,
+        content: Text("Passphrase could not be found."),
+      );
+
+      if (!context.mounted) return null;
+
+      ScaffoldMessenger.of(context).clearSnackBars();
+      ScaffoldMessenger.of(context).showSnackBar(snackBar);
+      return null;
+    }
+
+    if (response.statusCode == HttpStatus.ok) {
       var info = PlayerInfo.fromJson(jsonDecode(response.body));
       log('Player info received from server: ');
       log('lobbyID: ${info.lobbyID}');

lib/utils/config.dart

@@ -1,12 +1,12 @@
 const prodURL = 'chess.sw-gross.de:9999';
 const debugURL = 'localhost:8080';
 
-const dbgUrl = false;
+const useDbgUrl = false;
 
 String getHostURL() {
   var prot = 'https';
   var domain = prodURL;
-  if (dbgUrl) {
+  if (useDbgUrl) {
     prot = 'http';
     domain = debugURL;
   }
@@ -16,7 +16,7 @@ String getHostURL() {
 String getJoinURL() {
   var prot = 'https';
   var domain = prodURL;
-  if (dbgUrl) {
+  if (useDbgUrl) {
     prot = 'http';
     domain = debugURL;
   }
@@ -26,7 +26,7 @@ String getJoinURL() {
 String getWebsocketURL() {
   var prot = 'wss';
   var domain = prodURL;
-  if (dbgUrl) {
+  if (useDbgUrl) {
     prot = 'ws';
     domain = debugURL;
   }