feat: Store presences in database

lib/src/client.dart

@@ -1791,12 +1791,13 @@ class Client extends MatrixApi {
         await _handleRooms(leave, direction: direction);
       }
     }
-    for (final newPresence in sync.presence ?? []) {
+    for (final newPresence in sync.presence ?? <Presence>[]) {
       final cachedPresence = CachedPresence.fromMatrixEvent(newPresence);
       presences[newPresence.senderId] = cachedPresence;
       // ignore: deprecated_member_use_from_same_package
       onPresence.add(newPresence);
       onPresenceChanged.add(cachedPresence);
+      await database?.storePresence(newPresence.senderId, cachedPresence);
     }
     for (final newAccountData in sync.accountData ?? []) {
       await database?.storeAccountData(
@@ -2924,6 +2925,25 @@ class Client extends MatrixApi {
     return;
   }
 
+  /// The newest presence of this user if there is any. Fetches it from the
+  /// database first and then from the server if necessary or returns offline.
+  Future<CachedPresence> fetchCurrentPresence(String userId) async {
+    final cachedPresence = presences[userId];
+    if (cachedPresence != null) {
+      return cachedPresence;
+    }
+
+    final dbPresence = await database?.getPresence(userId);
+    if (dbPresence != null) return presences[userId] = dbPresence;
+
+    try {
+      final newPresence = await getPresence(userId);
+      return CachedPresence.fromPresenceResponse(newPresence, userId);
+    } catch (e) {
+      return CachedPresence.neverSeen(userId);
+    }
+  }
+
   bool _disposed = false;
   bool _aborted = false;
   Future _currentTransaction = Future.sync(() => {});

lib/src/database/database_api.dart

@@ -312,4 +312,8 @@ abstract class DatabaseApi {
   Future<String> exportDump();
 
   Future<bool> importDump(String export);
+
+  Future<void> storePresence(String userId, CachedPresence presence);
+
+  Future<CachedPresence?> getPresence(String userId);
 }

lib/src/database/hive_collections_database.dart

@@ -1478,6 +1478,18 @@ class HiveCollectionsDatabase extends DatabaseApi {
     return raw;
   }
 
+  @override
+  Future<void> storePresence(String userId, CachedPresence presence) =>
+      _presencesBox.put(userId, presence.toJson());
+
+  @override
+  Future<CachedPresence?> getPresence(String userId) async {
+    final rawPresence = await _presencesBox.get(userId);
+    if (rawPresence == null) return null;
+
+    return CachedPresence.fromJson(copyMap(rawPresence));
+  }
+
   @override
   Future<String> exportDump() async {
     final dataMap = {

lib/src/database/hive_database.dart

@@ -1450,6 +1450,18 @@ class FamedlySdkHiveDatabase extends DatabaseApi {
     return raw as String;
   }
 
+  @override
+  Future<void> storePresence(String userId, CachedPresence presence) =>
+      _presencesBox.put(userId, presence.toJson());
+
+  @override
+  Future<CachedPresence?> getPresence(String userId) async {
+    final rawPresence = await _presencesBox.get(userId);
+    if (rawPresence == null) return null;
+
+    return CachedPresence.fromJson(copyMap(rawPresence));
+  }
+
   @override
   Future<String> exportDump() {
     // see no need to implement this in a deprecated part

lib/src/presence.dart

@@ -25,6 +25,36 @@ class CachedPresence {
   bool? currentlyActive;
   String userid;
 
+  factory CachedPresence.fromJson(Map<String, Object?> json) =>
+      CachedPresence._(
+        presence: PresenceType.values
+            .singleWhere((type) => type.name == json['presence']),
+        lastActiveTimestamp: json['last_active_timestamp'] != null
+            ? DateTime.fromMillisecondsSinceEpoch(
+                json['last_active_timestamp'] as int)
+            : null,
+        statusMsg: json['status_msg'] as String?,
+        currentlyActive: json['currently_active'] as bool?,
+        userid: json['user_id'] as String,
+      );
+
+  Map<String, Object?> toJson() => {
+        'user_id': userid,
+        'presence': presence.name,
+        if (lastActiveTimestamp != null)
+          'last_active_timestamp': lastActiveTimestamp?.millisecondsSinceEpoch,
+        if (statusMsg != null) 'status_msg': statusMsg,
+        if (currentlyActive != null) 'currently_active': currentlyActive,
+      };
+
+  CachedPresence._({
+    required this.userid,
+    required this.presence,
+    this.lastActiveTimestamp,
+    this.statusMsg,
+    this.currentlyActive,
+  });
+
   CachedPresence(this.presence, int? lastActiveAgo, this.statusMsg,
       this.currentlyActive, this.userid) {
     if (lastActiveAgo != null) {
@@ -49,7 +79,7 @@ class CachedPresence {
 
   Presence toPresence() {
     final content = <String, dynamic>{
-      'presence': presence.toString(),
+      'presence': presence.name.toString(),
     };
     if (currentlyActive != null) content['currently_active'] = currentlyActive!;
     if (lastActiveTimestamp != null) {

lib/src/user.dart

@@ -155,20 +155,10 @@ class User extends Event {
   @Deprecated('Use fetchCurrentPresence() instead')
   Future<CachedPresence> get currentPresence => fetchCurrentPresence();
 
-  /// The newest presence of this user if there is any. Fetches it from the server if necessary or returns offline.
+  /// The newest presence of this user if there is any. Fetches it from the
-  Future<CachedPresence> fetchCurrentPresence() async {
+  /// database first and then from the server if necessary or returns offline.
-    final cachedPresence = room.client.presences[id];
+  Future<CachedPresence> fetchCurrentPresence() =>
-    if (cachedPresence != null) {
+      room.client.fetchCurrentPresence(id);
-      return cachedPresence;
-    }
-
-    try {
-      final newPresence = await room.client.getPresence(id);
-      return CachedPresence.fromPresenceResponse(newPresence, id);
-    } catch (e) {
-      return CachedPresence.neverSeen(id);
-    }
-  }
 
   /// Whether the client is able to ban/unban this user.
   bool get canBan => room.canBan && powerLevel < room.ownPowerLevel;

test/database_api_test.dart

@@ -457,6 +457,25 @@ void testDatabase(
       'deviceId',
     );
   });
+  test('getStorePresences', () async {
+    const userId = '@alice:example.com';
+    final presence = CachedPresence(
+      PresenceType.online,
+      100,
+      'test message',
+      true,
+      '@alice:example.com',
+    );
+    await database.storePresence(
+      userId,
+      presence,
+    );
+    final storedPresence = await database.getPresence(userId);
+    expect(
+      presence.toJson(),
+      storedPresence?.toJson(),
+    );
+  });
 
   // Clearing up from here
   test('clearSSSSCache', () async {