[Client] Add profile getter

lib/src/Client.dart

@@ -38,6 +38,7 @@ import 'User.dart';
 import 'requests/SetPushersRequest.dart';
 import 'responses/ErrorResponse.dart';
 import 'responses/PushrulesResponse.dart';
+import 'utils/Profile.dart';
 
 typedef AccountDataEventCB = void Function(AccountData accountData);
 typedef PresenceCB = void Function(Presence presence);
@@ -257,6 +258,19 @@ class Client {
     await connection.clear();
   }
 
+  /// Get the combined profile information for this user. This API may be used to
+  /// fetch the user's own profile information or other users; either locally
+  /// or on remote homeservers.
+  Future<Profile> getProfileFromUserId(String userId) async {
+    final dynamic resp = await connection.jsonRequest(
+        type: HTTPType.GET, action: "/client/r0/profile/${userId}");
+    if (resp is ErrorResponse) {
+      connection.onError.add(resp);
+      return null;
+    }
+    return Profile.fromJson(resp);
+  }
+
   /// Creates a new [RoomList] object.
   RoomList getRoomList(
       {onRoomListUpdateCallback onUpdate,

lib/src/utils/Profile.dart

@@ -0,0 +1,18 @@
+import 'package:famedlysdk/src/utils/MxContent.dart';
+
+/// Represents a user profile returned by a /profile request.
+class Profile {
+  /// The user's avatar URL if they have set one, otherwise null.
+  final MxContent avatarUrl;
+
+  /// The user's display name if they have set one, otherwise null.
+  final String displayname;
+
+  /// This API may return keys which are not limited to displayname or avatar_url.
+  final Map<String, dynamic> content;
+
+  Profile.fromJson(Map<String, dynamic> json)
+      : avatarUrl = MxContent(json['avatar_url']),
+        displayname = json['displayname'],
+        content = json;
+}

test/Client_test.dart

@@ -36,6 +36,7 @@ import 'package:famedlysdk/src/sync/EventUpdate.dart';
 import 'package:famedlysdk/src/sync/RoomUpdate.dart';
 import 'package:famedlysdk/src/sync/UserUpdate.dart';
 import 'package:famedlysdk/src/utils/MatrixFile.dart';
+import 'package:famedlysdk/src/utils/Profile.dart';
 import 'package:test/test.dart';
 
 import 'FakeMatrixApi.dart';
@@ -367,6 +368,15 @@ void main() {
       expect(archive.rooms[0].membership, Membership.leave);
     });
 
+    test('getProfileFromUserId', () async {
+      final Profile profile =
+          await matrix.getProfileFromUserId("@getme:example.com");
+      expect(profile.avatarUrl.mxc, "mxc://test");
+      expect(profile.displayname, "You got me");
+      expect(profile.content["avatar_url"], profile.avatarUrl.mxc);
+      expect(profile.content["displayname"], profile.displayname);
+    });
+
     test('Logout when token is unknown', () async {
       Future<LoginState> loginStateFuture =
           matrix.connection.onLoginStateChanged.stream.first;

test/FakeMatrixApi.dart

@@ -234,6 +234,10 @@ class FakeMatrixApi extends MockClient {
 
   static final Map<String, Map<String, dynamic>> api = {
     "GET": {
+      "/client/r0/profile/@getme:example.com": (var req) => {
+            "avatar_url": "mxc://test",
+            "displayname": "You got me",
+          },
       "/client/r0/rooms/!localpart:server.abc/state/m.room.member/@getme:example.com":
           (var req) => {
                 "avatar_url": "mxc://test",