presence [nfc]: Use RealmStore for server/realm settings

Author: gnprice

lib/model/presence.dart

@@ -6,7 +6,7 @@ import 'package:flutter/widgets.dart';
 import '../api/model/events.dart';
 import '../api/model/model.dart';
 import '../api/route/users.dart';
-import 'store.dart';
+import 'realm.dart';
 
 /// The model for tracking which users are online, idle, and offline.
 ///
@@ -16,21 +16,12 @@ import 'store.dart';
 /// so callers need to remember to add a listener (and remove it on dispose).
 /// In particular, [PerAccountStoreWidget] doesn't subscribe a widget subtree
 /// to updates.
-class Presence extends PerAccountStoreBase with ChangeNotifier {
+class Presence extends HasRealmStore with ChangeNotifier {
   Presence({
-    required super.core,
-    required this.serverPresencePingInterval,
-    required this.serverPresenceOfflineThresholdSeconds,
-    required this.realmPresenceDisabled,
+    required super.realm,
     required Map<int, PerUserPresence> initial,
   }) : _map = initial;
 
-  final Duration serverPresencePingInterval;
-  final int serverPresenceOfflineThresholdSeconds;
-  // TODO(#668): update this realm setting (probably by accessing it from a new
-  //   realm/server-settings substore that gets passed to Presence)
-  final bool realmPresenceDisabled;
-
   Map<int, PerUserPresence> _map;
 
   AppLifecycleListener? _appLifecycleListener;

lib/model/store.dart

@@ -504,10 +504,7 @@ class PerAccountStore extends PerAccountStoreBase with
       users: UserStoreImpl(core: core, initialSnapshot: initialSnapshot),
       typingStatus: TypingStatus(core: core,
         typingStartedExpiryPeriod: Duration(milliseconds: initialSnapshot.serverTypingStartedExpiryPeriodMilliseconds)),
-      presence: Presence(core: core,
-        serverPresencePingInterval: Duration(seconds: initialSnapshot.serverPresencePingIntervalSeconds),
-        serverPresenceOfflineThresholdSeconds: initialSnapshot.serverPresenceOfflineThresholdSeconds,
-        realmPresenceDisabled: initialSnapshot.realmPresenceDisabled,
+      presence: Presence(realm: realm,
         initial: initialSnapshot.presences),
       channels: channels,
       messages: MessageStoreImpl(realm: realm),