✨ Basic event based rendering

lib/providers/message/helper.dart

@@ -18,7 +18,7 @@ Future<MessageHistoryDb> createHistoryDb() async {
 }
 
 extension MessageHistoryHelper on MessageHistoryDb {
-  receiveEvent(Event remote) async {
+  Future<LocalEvent> receiveEvent(Event remote) async {
     final entry = LocalEvent(
       remote.id,
       remote,
@@ -46,6 +46,17 @@ extension MessageHistoryHelper on MessageHistoryDb {
     return entry;
   }
 
+  Future<LocalEvent?> getEvent(int id, Channel channel,
+      {String scope = 'global'}) async {
+    final localRecord = await localEvents.findById(id);
+    if (localRecord != null) return localRecord;
+
+    final remoteRecord = await _getRemoteEvent(id, channel, scope);
+    if (remoteRecord == null) return null;
+
+    return await receiveEvent(remoteRecord);
+  }
+
   Future<(List<Event>, int)?> syncEvents(Channel channel,
       {String scope = 'global', depth = 10, offset = 0}) async {
     final lastOne = await localEvents.findLastByChannel(channel.id);
@@ -70,6 +81,25 @@ extension MessageHistoryHelper on MessageHistoryDb {
     return data;
   }
 
+  Future<Event?> _getRemoteEvent(int id, Channel channel, String scope) async {
+    final AuthProvider auth = Get.find();
+    if (!await auth.isAuthorized) return null;
+
+    final client = auth.configureClient('messaging');
+
+    final resp = await client.get(
+      '/api/channels/$scope/${channel.alias}/events/$id',
+    );
+
+    if (resp.statusCode == 404) {
+      return null;
+    } else if (resp.statusCode != 200) {
+      throw Exception(resp.bodyString);
+    }
+
+    return Event.fromJson(resp.body);
+  }
+
   Future<(List<Event>, int)?> _getRemoteEvents(
     Channel channel,
     String scope, {