♻️ Use controller instead of state to manage history

lib/controllers/chat_history_controller.dart

@@ -0,0 +1,48 @@
+import 'package:get/get.dart';
+import 'package:solian/models/channel.dart';
+import 'package:solian/models/message.dart';
+import 'package:solian/providers/message/helper.dart';
+import 'package:solian/providers/message/history.dart';
+
+class ChatHistoryController {
+  late final MessageHistoryDb database;
+
+  final RxList<LocalMessage> currentHistory = RxList.empty(growable: true);
+  final RxInt totalHistoryCount = 0.obs;
+
+  initialize() async {
+    database = await createHistoryDb();
+    currentHistory.clear();
+  }
+
+  Future<void> getMessages(Channel channel, String scope) async {
+    totalHistoryCount.value = await database.syncMessages(channel, scope: scope);
+    await syncHistory(channel);
+  }
+
+  Future<void> syncHistory(Channel channel) async {
+    currentHistory.replaceRange(0, currentHistory.length,
+        await database.localMessages.findAllByChannel(channel.id));
+  }
+
+  receiveMessage(Message remote) async {
+    final entry = await database.receiveMessage(remote);
+    totalHistoryCount.value++;
+    currentHistory.add(entry);
+  }
+
+  void replaceMessage(Message remote) async {
+    final entry = await database.replaceMessage(remote);
+    currentHistory.replaceRange(
+      0,
+      currentHistory.length,
+      currentHistory.map((x) => x.id == entry.id ? entry : x),
+    );
+  }
+
+  void burnMessage(int id) async {
+    await database.burnMessage(id);
+    totalHistoryCount.value--;
+    currentHistory.removeWhere((x) => x.id == id);
+  }
+}