Remove json translations approach, add example for adding language

Signed-off-by: Sahil Kumar <[email protected]>

packages/stream_chat_flutter/example/lib/main.dart

@@ -1,10 +1,35 @@
+import 'package:flutter/cupertino.dart';
+import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
+import 'package:flutter_localizations/flutter_localizations.dart';
 import 'package:stream_chat_flutter/stream_chat_flutter.dart';
-import 'package:stream_chat_persistence/stream_chat_persistence.dart';
+import 'package:stream_chat_localizations/stream_chat_localizations.dart';
 
-final chatPersistentClient = StreamChatPersistenceClient(
-  logLevel: Level.INFO,
-);
+/// A custom set of localizations for the 'hi' locale.
+class StreamChatLocalizationsHi extends GlobalStreamChatLocalizations {
+  const StreamChatLocalizationsHi() : super(localeName: 'hi');
+
+  static const LocalizationsDelegate<StreamChatLocalizations> delegate =
+      _HindiStreamChatLocalizationsDelegate();
+
+  @override
+  String get launchUrlError => 'URL लॉन्च नहीं कर सकता';
+}
+
+class _HindiStreamChatLocalizationsDelegate
+    extends LocalizationsDelegate<StreamChatLocalizations> {
+  const _HindiStreamChatLocalizationsDelegate();
+
+  @override
+  bool isSupported(Locale locale) => locale.languageCode == 'hi';
+
+  @override
+  Future<StreamChatLocalizations> load(Locale locale) =>
+      SynchronousFuture(const StreamChatLocalizationsHi());
+
+  @override
+  bool shouldReload(_HindiStreamChatLocalizationsDelegate old) => false;
+}
 
 void main() async {
   WidgetsFlutterBinding.ensureInitialized();
@@ -14,7 +39,7 @@ void main() async {
   final client = StreamChatClient(
     's2dxdhpxd94g',
     logLevel: Level.INFO,
-  )..chatPersistenceClient = chatPersistentClient;
+  );
 
   /// Set the current user and connect the websocket. In a production scenario, this should be done using
   /// a backend to generate a user token using our server SDK.
@@ -58,6 +83,17 @@ class MyApp extends StatelessWidget {
       theme: ThemeData.light(),
       darkTheme: ThemeData.dark(),
       themeMode: ThemeMode.system,
+      supportedLocales: [
+        Locale('en', 'US'),
+        Locale('hi', 'IN'),
+      ],
+      localizationsDelegates: [
+        GlobalStreamChatLocalizations.delegate,
+        GlobalCupertinoLocalizations.delegate,
+        GlobalMaterialLocalizations.delegate,
+        GlobalWidgetsLocalizations.delegate,
+        StreamChatLocalizationsHi.delegate,
+      ],
       builder: (context, widget) {
         return StreamChat(
           client: client,

packages/stream_chat_flutter/example/pubspec.yaml

@@ -29,6 +29,8 @@ dependencies:
 #    path: ../../stream_chat_flutter_core
   stream_chat_flutter:
     path: ../
+  stream_chat_localizations:
+    path: ../../stream_chat_localizations
   stream_chat_persistence: 
     path: ../../stream_chat_persistence
 

packages/stream_chat_flutter/lib/src/extension.dart

@@ -104,11 +104,7 @@ extension BuildContextX on BuildContext {
   double get textScaleFactor =>
       MediaQuery.maybeOf(this)?.textScaleFactor ?? 1.0;
 
-  String translate({
-    required String key,
-    required String defaultValue,
-  }) =>
-      StreamChatLocalizations.of(this)?.translate(key) ?? defaultValue;
+  StreamChatLocalizations? get translations => StreamChatLocalizations.of(this);
 }
 
 /// Extension on [BorderRadius]

packages/stream_chat_flutter/lib/src/message_text.dart

@@ -3,6 +3,7 @@ import 'package:flutter/material.dart';
 import 'package:flutter_markdown/flutter_markdown.dart';
 import 'package:stream_chat_flutter/stream_chat_flutter.dart';
 import 'package:stream_chat_flutter_core/stream_chat_flutter_core.dart';
+import 'package:stream_chat_flutter/src/extension.dart';
 
 /// Text widget to display in message
 class MessageText extends StatelessWidget {
@@ -29,6 +30,8 @@ class MessageText extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
+    final texts = context.translations?.launchUrlError ?? 'defaultValue';
+    return Text(texts);
     final text = _replaceMentions(message.text ?? '').replaceAll('\n', '\n\n');
 
     final themeData = Theme.of(context);

packages/stream_chat_flutter/lib/src/stream_chat_localizations.dart

@@ -71,9 +71,6 @@ import 'package:flutter/widgets.dart';
 ///  * [GlobalStreamChatLocalizations], which provides material localizations
 ///    for many languages.
 abstract class StreamChatLocalizations {
-  ///
-  String? translate(String key);
-
   /// The `StreamChatLocalizations` from the closest [Localizations] instance
   /// that encloses the given context.
   ///
@@ -94,4 +91,6 @@ abstract class StreamChatLocalizations {
         context,
         StreamChatLocalizations,
       );
+
+  String get launchUrlError;
 }

packages/stream_chat_flutter/pubspec.yaml

@@ -7,6 +7,7 @@ issue_tracker: https://github.com/GetStream/stream-chat-flutter/issues
 
 environment:
   sdk: '>=2.12.0 <3.0.0'
+  flutter: ">=1.17.0"
 
 dependencies:
   cached_network_image: ^3.0.0