⚡ User channel profile cache

lib/controllers/chat_message_controller.dart

@@ -8,6 +8,7 @@ import 'package:flutter/material.dart';
 import 'package:provider/provider.dart';
 import 'package:surface/database/database.dart';
 import 'package:surface/logger.dart';
+import 'package:surface/providers/channel.dart';
 import 'package:surface/providers/database.dart';
 import 'package:surface/providers/keypair.dart';
 import 'package:surface/providers/sn_attachment.dart';
@@ -26,6 +27,7 @@ class ChatMessageController extends ChangeNotifier {
   late final WebSocketProvider _ws;
   late final SnAttachmentProvider _attach;
   late final DatabaseProvider _dt;
+  late final ChatChannelProvider _ct;
   late final KeyPairProvider _kp;
 
   StreamSubscription? _wsSubscription;
@@ -35,6 +37,7 @@ class ChatMessageController extends ChangeNotifier {
     _ud = context.read<UserDirectoryProvider>();
     _ws = context.read<WebSocketProvider>();
     _attach = context.read<SnAttachmentProvider>();
+    _ct = context.read<ChatChannelProvider>();
     _dt = context.read<DatabaseProvider>();
     _kp = context.read<KeyPairProvider>();
   }
@@ -65,10 +68,7 @@ class ChatMessageController extends ChangeNotifier {
     channel = chan;
 
     // Fetch channel profile
-    final resp = await _sn.client.get(
-      '/cgi/im/channels/${chan.keyPath}/me',
-    );
-    profile = SnChannelMember.fromJson(resp.data);
+    profile = await _ct.getChannelProfile(channel!);
 
     _wsSubscription = _ws.pk.stream.listen((event) {
       switch (event.method) {

lib/providers/channel.dart

@@ -8,6 +8,7 @@ import 'package:surface/providers/database.dart';
 import 'package:surface/providers/sn_network.dart';
 import 'package:surface/providers/sn_realm.dart';
 import 'package:surface/providers/user_directory.dart';
+import 'package:surface/providers/userinfo.dart';
 import 'package:surface/types/chat.dart';
 
 class ChatChannelProvider extends ChangeNotifier {
@@ -15,12 +16,14 @@ class ChatChannelProvider extends ChangeNotifier {
 
   late final SnNetworkProvider _sn;
   late final UserDirectoryProvider _ud;
+  late final UserProvider _ua;
   late final DatabaseProvider _dt;
   late final SnRealmProvider _rels;
 
   ChatChannelProvider(BuildContext context) {
     _sn = context.read<SnNetworkProvider>();
     _ud = context.read<UserDirectoryProvider>();
+    _ua = context.read<UserProvider>();
     _dt = context.read<DatabaseProvider>();
     _rels = context.read<SnRealmProvider>();
   }
@@ -149,4 +152,60 @@ class ChatChannelProvider extends ChangeNotifier {
     await _ud.listAccount(out.map((ele) => ele.sender.accountId).toSet());
     return out;
   }
+
+  Future<void> _saveMemberToLocal(Iterable<SnChannelMember> members) async {
+    final queries = members.map((ele) {
+      return _dt.db.snLocalChannelMember.insertOne(
+        SnLocalChannelMemberCompanion.insert(
+          id: Value(ele.id),
+          channelId: ele.channelId,
+          accountId: ele.accountId,
+          content: ele,
+          cacheExpiredAt: DateTime.now().add(const Duration(days: 7)),
+        ),
+        onConflict: DoUpdate(
+          (_) => SnLocalChannelMemberCompanion.custom(
+            content: Constant(jsonEncode(ele.toJson())),
+            cacheExpiredAt:
+                Constant(DateTime.now().add(const Duration(days: 7))),
+          ),
+        ),
+      );
+    });
+    await Future.wait(queries);
+  }
+
+  Future<void> removeLocalChannel(SnChannel channel) async {
+    await _dt.db.transaction(() async {
+      await (_dt.db.snLocalChannelMember.delete()
+            ..where((e) => e.channelId.equals(channel.id)))
+          .go();
+      await (_dt.db.snLocalChatChannel.delete()
+            ..where((e) => e.id.equals(channel.id)))
+          .go();
+      await (_dt.db.snLocalChatMessage.delete()
+            ..where((e) => e.channelId.equals(channel.id)))
+          .go();
+    });
+  }
+
+  Future<void> updateChannelProfile(SnChannelMember member) {
+    return _saveMemberToLocal([member]);
+  }
+
+  Future<SnChannelMember> getChannelProfile(SnChannel channel) async {
+    if (_ua.user == null) throw Exception('User not logged in');
+    final local = await (_dt.db.snLocalChannelMember.select()
+          ..where((e) => e.channelId.equals(channel.id))
+          ..where((e) => e.accountId.equals(_ua.user!.id)))
+        .getSingleOrNull();
+    if (local != null) {
+      return local.content;
+    }
+
+    final resp = await _sn.client.get('/cgi/im/channels/${channel.keyPath}/me');
+    final out = SnChannelMember.fromJson(resp.data);
+    _saveMemberToLocal([out]);
+    return out;
+  }
 }

lib/screens/chat/channel_detail.dart

@@ -57,11 +57,9 @@ class _ChannelDetailScreenState extends State<ChannelDetailScreen> {
     setState(() => _isBusy = true);
 
     try {
-      final sn = context.read<SnNetworkProvider>();
-      final resp =
-          await sn.client.get('/cgi/im/channels/${_channel!.keyPath}/me');
-      _profile = SnChannelMember.fromJson(resp.data);
-      _notifyLevel = _profile!.notify;
+      final ct = context.read<ChatChannelProvider>();
+      final resp = await ct.getChannelProfile(_channel!);
+      _notifyLevel = resp.notify;
       if (!mounted) return;
       final ud = context.read<UserDirectoryProvider>();
       await ud.getAccount(_profile!.accountId);
@@ -103,10 +101,12 @@ class _ChannelDetailScreenState extends State<ChannelDetailScreen> {
     if (!mounted) return;
 
     try {
+      final ct = context.read<ChatChannelProvider>();
       final sn = context.read<SnNetworkProvider>();
       await sn.client.delete(
         '/cgi/im/channels/${_channel!.realm?.alias ?? 'global'}/${_channel!.alias}/me',
       );
+      await ct.removeLocalChannel(_channel!);
       if (!mounted) return;
       Navigator.pop(context, false);
     } catch (err) {
@@ -130,12 +130,14 @@ class _ChannelDetailScreenState extends State<ChannelDetailScreen> {
     setState(() => _isUpdatingNotifyLevel = true);
 
     try {
+      final ct = context.read<ChatChannelProvider>();
       final sn = context.read<SnNetworkProvider>();
       await sn.client.put(
         '/cgi/im/channels/${_channel!.keyPath}/members/me/notify',
         data: {'notify_level': value},
       );
       _notifyLevel = value;
+      await ct.updateChannelProfile(_profile!);
       if (!mounted) return;
       context.showSnackbar('channelNotifyLevelApplied'.tr());
     } catch (err) {