[Refactoring] Make analyzer happy.

lib/src/Connection.dart

@@ -251,8 +251,6 @@ class Connection {
   Future<void> _sync() async {
     if (client.isLogged() == false) return;
 
-    dynamic args = {};
-
     String action = "/client/r0/sync?filters=$_firstSyncFilters";
 
     if (client.prevBatch != null) {
@@ -383,8 +381,6 @@ class Connection {
                     is Map<String, dynamic> &&
                 events[i]["content"][e]["m.read"]["ts"] is num)) return;
 
-            num timestamp = events[i]["content"][e]["m.read"]["ts"];
-
             _handleEvent(events[i], id, "ephemeral");
           });
         });
@@ -410,7 +406,8 @@ class Connection {
 
   void _handleGlobalEvents(List<dynamic> events, String type) {
     for (int i = 0; i < events.length; i++)
-      if (events[i]["type"] is String && events[i]["content"] is dynamic) {
+      if (events[i]["type"] is String &&
+          events[i]["content"] is Map<String, dynamic>) {
         UserUpdate update = UserUpdate(
           eventType: events[i]["type"],
           type: type,
@@ -422,7 +419,7 @@ class Connection {
   }
 
   void _handleEvent(Map<String, dynamic> event, String roomID, String type) {
-    if (event["type"] is String && event["content"] is dynamic) {
+    if (event["type"] is String && event["content"] is Map<String, dynamic>) {
       EventUpdate update = EventUpdate(
         eventType: event["type"],
         roomID: roomID,

lib/src/Event.dart

@@ -123,6 +123,7 @@ class Event {
             return EventTypes.Location;
         }
     }
+    return EventTypes.Text;
   }
 
   /// Generate a new Event object from a json string, mostly a table row.

lib/src/RoomList.dart

@@ -82,8 +82,6 @@ class RoomList {
     // Does the chat already exist in the list rooms?
     if (!found && chatUpdate.membership != "leave") {
       num position = chatUpdate.membership == "invite" ? 0 : j;
-      ChatTime timestamp =
-          chatUpdate.membership == "invite" ? ChatTime.now() : ChatTime(0);
       // Add the new chat to the list
       Room newRoom = Room(
           id: chatUpdate.id,
@@ -97,7 +95,7 @@ class RoomList {
     }
     // If the membership is "leave" then remove the item and stop here
     else if (found && chatUpdate.membership == "leave") {
-      final Room removed = rooms.removeAt(j);
+      rooms.removeAt(j);
       if (onRemove != null) onRemove(j);
     }
     // Update notification and highlight count
@@ -132,7 +130,6 @@ class RoomList {
 
     if (eventUpdate.type == "timeline") {
       // Update the last message preview
-      String body = eventUpdate.content["content"]["body"] ?? "";
       rooms[j].lastEvent = Event(
         eventUpdate.content["id"],
         User(eventUpdate.content["sender"]),

lib/src/Store.dart

@@ -144,6 +144,7 @@ class Store {
   Future<void> storePrevBatch(dynamic sync) {
     txn.rawUpdate("UPDATE Clients SET prev_batch=? WHERE client=?",
         [client.prevBatch, client.clientName]);
+    return null;
   }
 
   /// Stores a RoomUpdate object in the database. Must be called inside of
@@ -172,14 +173,12 @@ class Store {
       txn.rawUpdate("UPDATE Rooms SET prev_batch=? WHERE id=?",
           [roomUpdate.prev_batch, roomUpdate.id]);
     }
+    return null;
   }
 
   /// Stores an UserUpdate object in the database. Must be called inside of
   /// [transaction].
   Future<void> storeUserEventUpdate(UserUpdate userUpdate) {
-    dynamic eventContent = userUpdate.content;
-    String type = userUpdate.type;
-
     switch (userUpdate.eventType) {
       case "m.direct":
         if (userUpdate.content["content"] is Map<String, dynamic>) {
@@ -195,6 +194,7 @@ class Store {
         }
         break;
     }
+    return null;
   }
 
   /// Stores an EventUpdate object in the database. Must be called inside of
@@ -412,6 +412,7 @@ class Store {
         }
         break;
     }
+    return null;
   }
 
   /// Returns a User object by a given Matrix ID and a Room.

lib/src/User.dart

@@ -22,7 +22,6 @@
  */
 
 import 'package:famedlysdk/src/responses/ErrorResponse.dart';
-import 'package:famedlysdk/src/Client.dart';
 import 'package:famedlysdk/src/utils/MxContent.dart';
 import 'package:famedlysdk/src/Room.dart';
 
@@ -74,7 +73,7 @@ class User {
   /// Returns the displayname or the local part of the Matrix ID if the user
   /// has no displayname.
   String calcDisplayname() => displayName.isEmpty
-      ? mxid.replaceFirst("@", "").split(":")[0]
+      ? id.replaceFirst("@", "").split(":")[0]
       : displayName;
 
   /// Creates a new User object from a json string like a row from the database.
@@ -129,7 +128,7 @@ class User {
   /// Returns null on error.
   Future<String> startDirectChat() async {
     // Try to find an existing direct chat
-    String roomID = await room.client?.store.getDirectChatRoomID(id);
+    String roomID = await room.client?.store?.getDirectChatRoomID(id);
     if (roomID != null) return roomID;
 
     // Start a new direct chat

lib/src/utils/ChatTime.dart

@@ -77,9 +77,8 @@ class ChatTime {
       }
     } else if (sameYear) {
       return DateFormat('dd.MM').format(dateTime);
-    } else {
-      return DateFormat('dd.MM.yyyy').format(dateTime);
     }
+    return DateFormat('dd.MM.yyyy').format(dateTime);
   }
 
   /// Returns the milliseconds since the Unix epoch.

test/Client_test.dart

@@ -249,7 +249,7 @@ void main() {
     test('Logout when token is unknown', () async {
       Future<LoginState> loginStateFuture =
           matrix.connection.onLoginStateChanged.stream.first;
-      final resp = await matrix.connection
+      await matrix.connection
           .jsonRequest(type: "DELETE", action: "/unknown/token");
 
       LoginState state = await loginStateFuture;

test/RoomList_test.dart

@@ -23,10 +23,7 @@
 
 import 'package:flutter_test/flutter_test.dart';
 import 'package:famedlysdk/src/Client.dart';
-import 'package:famedlysdk/src/Event.dart';
-import 'package:famedlysdk/src/Room.dart';
 import 'package:famedlysdk/src/RoomList.dart';
-import 'package:famedlysdk/src/User.dart';
 import 'package:famedlysdk/src/sync/EventUpdate.dart';
 import 'package:famedlysdk/src/sync/RoomUpdate.dart';
 import 'package:famedlysdk/src/utils/ChatTime.dart';