✨ Handle more chat server events

lib/i18n/app_en.arb

@@ -28,6 +28,7 @@
   "takeVideo": "Record video",
   "newMoment": "Record a moment",
   "newComment": "Leave a comment",
+  "connectingServer": "Connecting to server...",
   "postIdentityNotify": "You will create this post as",
   "postContentPlaceholder": "What's happened?!",
   "postDeleteConfirm": "Are you sure you want to delete this post? This operation cannot be revert!",

lib/i18n/app_zh.arb

@@ -28,6 +28,7 @@
   "takeVideo": "拍摄视频",
   "newMoment": "记录时刻",
   "newComment": "留下评论",
+  "connectingServer": "正在连接至服务器……",
   "postIdentityNotify": "你将会以该身份发表本帖子",
   "postContentPlaceholder": "发生什么事了？！",
   "postDeleteConfirm": "你确定要删除这篇帖子吗？这意味着这个帖子将永远被我们丢弃在硬盘海中！该操作不可被反转！",

lib/screens/chat/chat.dart

@@ -79,10 +79,20 @@ class _ChatScreenState extends State<ChatScreen> {
   }
 
   void addMessage(Message item) {
-    WidgetsBinding.instance.addPostFrameCallback((_) {
     setState(() {
       _pagingController.itemList?.insert(0, item);
     });
+  }
+
+  void updateMessage(Message item) {
+    setState(() {
+      _pagingController.itemList = _pagingController.itemList?.map((x) => x.id == item.id ? item : x).toList();
+    });
+  }
+
+  void deleteMessage(Message item) {
+    setState(() {
+      _pagingController.itemList = _pagingController.itemList?.where((x) => x.id != item.id).toList();
     });
   }
 
@@ -138,7 +148,9 @@ class _ChatScreenState extends State<ChatScreen> {
             ChatMessageEditor(channel: widget.alias),
           ],
         ),
-        onNewMessage: (message) => addMessage(message),
+        onInsertMessage: (message) => addMessage(message),
+        onUpdateMessage: (message) => updateMessage(message),
+        onDeleteMessage: (message) => deleteMessage(message),
       ),
     );
   }

lib/widgets/chat/maintainer.dart

@@ -6,33 +6,65 @@ import 'package:solian/models/message.dart';
 import 'package:solian/models/packet.dart';
 import 'package:solian/providers/auth.dart';
 import 'package:solian/providers/chat.dart';
+import 'package:flutter_gen/gen_l10n/app_localizations.dart';
 
 class ChatMaintainer extends StatefulWidget {
   final Widget child;
-  final Function(Message val) onNewMessage;
+  final Function(Message val) onInsertMessage;
+  final Function(Message val) onUpdateMessage;
+  final Function(Message val) onDeleteMessage;
 
-  const ChatMaintainer({super.key, required this.child, required this.onNewMessage});
+  const ChatMaintainer({
+    super.key,
+    required this.child,
+    required this.onInsertMessage,
+    required this.onUpdateMessage,
+    required this.onDeleteMessage,
+  });
 
   @override
   State<ChatMaintainer> createState() => _ChatMaintainerState();
 }
 
 class _ChatMaintainerState extends State<ChatMaintainer> {
-  @override
+  void connect() {
-  void initState() {
+    final notify = ScaffoldMessenger.of(context).showSnackBar(
-    Future.delayed(Duration.zero, () {
+      SnackBar(
+        content: Text(AppLocalizations.of(context)!.connectingServer),
+        duration: const Duration(days: 1),
+      ),
+    );
+
     final auth = context.read<AuthProvider>();
     final chat = context.read<ChatProvider>();
 
     chat.connect(auth).then((snapshot) {
-        snapshot!.stream.listen((event) {
+      snapshot!.stream.listen(
+        (event) {
           final result = NetworkPackage.fromJson(jsonDecode(event));
           switch (result.method) {
             case 'messages.new':
-              widget.onNewMessage(Message.fromJson(result.payload!));
+              widget.onInsertMessage(Message.fromJson(result.payload!));
+              break;
+            case 'messages.update':
+              widget.onUpdateMessage(Message.fromJson(result.payload!));
+              break;
+            case 'messages.burnt':
+              widget.onDeleteMessage(Message.fromJson(result.payload!));
+              break;
           }
+        },
+        onError: (_, __) => connect(),
+      );
+
+      notify.close();
     });
-      });
+  }
+
+  @override
+  void initState() {
+    Future.delayed(Duration.zero, () {
+      connect();
     });
 
     super.initState();