Add profile cache

lib/src/client.dart

@@ -373,13 +373,39 @@ class Client {
     return getProfileFromUserId(userID);
   }
 
-  /// Get the combined profile information for this user. This API may be used to
+  final Map<String, Profile> _profileCache = {};
-  /// fetch the user's own profile information or other users; either locally
+
-  /// or on remote homeservers.
+  /// Get the combined profile information for this user.
-  Future<Profile> getProfileFromUserId(String userId) async {
+  /// If [getFromRooms] is true then the profile will first be searched from the
-    final dynamic resp = await jsonRequest(
+  /// room memberships. This is unstable if the given user makes use of different displaynames
+  /// and avatars per room, which is common for some bots and bridges.
+  /// If [cache] is true then
+  /// the profile get cached for this session. Please note that then the profile may
+  /// become outdated if the user changes the displayname or avatar in this session.
+  Future<Profile> getProfileFromUserId(String userId,
+      {bool cache = true, bool getFromRooms = true}) async {
+    if (getFromRooms) {
+      final room = rooms.firstWhere(
+          (Room room) =>
+              room
+                  .getParticipants()
+                  .indexWhere((User user) => user.id == userId) !=
+              -1,
+          orElse: () => null);
+      if (room != null) {
+        final user =
+            room.getParticipants().firstWhere((User user) => user.id == userId);
+        return Profile(user.displayName, user.avatarUrl);
+      }
+    }
+    if (cache && _profileCache.containsKey(userId)) {
+      return _profileCache[userId];
+    }
+    final resp = await jsonRequest(
         type: HTTPType.GET, action: '/client/r0/profile/${userId}');
-    return Profile.fromJson(resp);
+    final profile = Profile.fromJson(resp);
+    _profileCache[userId] = profile;
+    return profile;
   }
 
   Future<List<Room>> get archive async {
@@ -635,7 +661,8 @@ class Client {
       StreamController.broadcast();
 
   /// Will be called when another device is requesting verification with this device.
-  final StreamController<KeyVerification> onKeyVerificationRequest = StreamController.broadcast();
+  final StreamController<KeyVerification> onKeyVerificationRequest =
+      StreamController.broadcast();
 
   final Map<String, KeyVerification> _keyVerificationRequests = {};
 
@@ -1065,7 +1092,9 @@ class Client {
   void _cleanupKeyVerificationRequests() {
     for (final entry in _keyVerificationRequests.entries) {
       (() async {
-        var dispose = entry.value.canceled || entry.value.state == KeyVerificationState.done || entry.value.state == KeyVerificationState.error;
+        var dispose = entry.value.canceled ||
+            entry.value.state == KeyVerificationState.done ||
+            entry.value.state == KeyVerificationState.error;
         if (!dispose) {
           dispose = !(await entry.value.verifyActivity());
         }
@@ -1119,13 +1148,18 @@ class Client {
       return;
     }
     // we have key verification going on!
-    final transactionId = KeyVerification.getTransactionId(toDeviceEvent.content);
+    final transactionId =
+        KeyVerification.getTransactionId(toDeviceEvent.content);
     if (transactionId != null) {
       if (_keyVerificationRequests.containsKey(transactionId)) {
-        _keyVerificationRequests[transactionId].handlePayload(toDeviceEvent.type, toDeviceEvent.content);
+        _keyVerificationRequests[transactionId]
+            .handlePayload(toDeviceEvent.type, toDeviceEvent.content);
       } else {
-        final newKeyRequest = KeyVerification(client: this, userId: toDeviceEvent.sender);
+        final newKeyRequest =
-        newKeyRequest.handlePayload(toDeviceEvent.type, toDeviceEvent.content).then((res) {
+            KeyVerification(client: this, userId: toDeviceEvent.sender);
+        newKeyRequest
+            .handlePayload(toDeviceEvent.type, toDeviceEvent.content)
+            .then((res) {
           if (newKeyRequest.state != KeyVerificationState.askAccept) {
             // okay, something went wrong (unknown transaction id?), just dispose it
             newKeyRequest.dispose();

lib/src/utils/profile.dart

@@ -9,8 +9,11 @@ class Profile {
   /// This API may return keys which are not limited to displayname or avatar_url.
   final Map<String, dynamic> content;
 
+  const Profile(this.displayname, this.avatarUrl, {this.content = const {}});
+
   Profile.fromJson(Map<String, dynamic> json)
-      : avatarUrl = json['avatar_url'] != null ? Uri.parse(json['avatar_url']) : null,
+      : avatarUrl =
+            json['avatar_url'] != null ? Uri.parse(json['avatar_url']) : null,
         displayname = json['displayname'],
         content = json;
 

test/client_test.dart

@@ -160,14 +160,16 @@ void main() {
       expect(
           matrix
               .rooms[1]
-              .inboundGroupSessions['ciM/JWTPrmiWPPZNkRLDPQYf9AW/I46bxyLSr+Bx5oU']
+              .inboundGroupSessions[
+                  'ciM/JWTPrmiWPPZNkRLDPQYf9AW/I46bxyLSr+Bx5oU']
               .content['session_key'],
           'AgAAAAAQcQ6XrFJk6Prm8FikZDqfry/NbDz8Xw7T6e+/9Yf/q3YHIPEQlzv7IZMNcYb51ifkRzFejVvtphS7wwG2FaXIp4XS2obla14iKISR0X74ugB2vyb1AydIHE/zbBQ1ic5s3kgjMFlWpu/S3FQCnCrv+DPFGEt3ERGWxIl3Bl5X53IjPyVkz65oljz2TZESwz0GH/QFvyOOm8ci0q/gceaF3S7Dmafg3dwTKYwcA5xkcc+BLyrLRzB6Hn+oMAqSNSscnm4mTeT5zYibIhrzqyUTMWr32spFtI9dNR/RFSzfCw');
       if (olmEnabled) {
         expect(
             matrix
                     .rooms[1]
-                    .inboundGroupSessions['ciM/JWTPrmiWPPZNkRLDPQYf9AW/I46bxyLSr+Bx5oU']
+                    .inboundGroupSessions[
+                        'ciM/JWTPrmiWPPZNkRLDPQYf9AW/I46bxyLSr+Bx5oU']
                     .inboundGroupSession !=
                 null,
             true);
@@ -464,11 +466,17 @@ void main() {
     });
 
     test('getProfileFromUserId', () async {
-      final profile = await matrix.getProfileFromUserId('@getme:example.com');
+      final profile = await matrix.getProfileFromUserId('@getme:example.com',
+          getFromRooms: false);
       expect(profile.avatarUrl.toString(), 'mxc://test');
       expect(profile.displayname, 'You got me');
       expect(profile.content['avatar_url'], profile.avatarUrl.toString());
       expect(profile.content['displayname'], profile.displayname);
+      final aliceProfile =
+          await matrix.getProfileFromUserId('@alice:example.com');
+      expect(aliceProfile.avatarUrl.toString(),
+          'mxc://example.org/SEsfnsuifSDFSSEF');
+      expect(aliceProfile.displayname, 'Alice Margatroid');
     });
 
     test('signJson', () {