refactor: use map

lib/src/model/event_context.dart

@@ -34,24 +34,20 @@ class EventContext {
   EventContext.fromJson(Map<String, dynamic> json) {
     end = json['end'];
     if (json['events_after'] != null) {
-      eventsAfter = <MatrixEvent>[];
-      json['events_after'].forEach((v) {
-        eventsAfter.add(MatrixEvent.fromJson(v));
-      });
+      eventsAfter = (json['events_after'] as List)
+          .map((v) => MatrixEvent.fromJson(v))
+          .toList();
     }
     event = json['event'] != null ? MatrixEvent.fromJson(json['event']) : null;
     if (json['events_before'] != null) {
-      eventsBefore = <MatrixEvent>[];
-      json['events_before'].forEach((v) {
-        eventsBefore.add(MatrixEvent.fromJson(v));
-      });
+      eventsBefore = (json['events_before'] as List)
+          .map((v) => MatrixEvent.fromJson(v))
+          .toList();
     }
     start = json['start'];
     if (json['state'] != null) {
-      state = <MatrixEvent>[];
-      json['state'].forEach((v) {
-        state.add(MatrixEvent.fromJson(v));
-      });
+      state =
+          (json['state'] as List).map((v) => MatrixEvent.fromJson(v)).toList();
     }
   }
 

lib/src/model/login_types.dart

@@ -26,10 +26,7 @@ class LoginTypes {
 
   LoginTypes.fromJson(Map<String, dynamic> json) {
     if (json['flows'] != null) {
-      flows = <Flows>[];
-      json['flows'].forEach((v) {
-        flows.add(Flows.fromJson(v));
-      });
+      flows = (json['flows'] as List).map((v) => Flows.fromJson(v)).toList();
     }
   }
 

lib/src/model/matrix_exception.dart

@@ -88,13 +88,11 @@ class MatrixException implements Exception {
   /// doesn't need additional authentication, then this is null.
   List<AuthenticationFlow> get authenticationFlows {
     if (!raw.containsKey('flows') || !(raw['flows'] is List)) return null;
-    var flows = <AuthenticationFlow>[];
-    for (Map<String, dynamic> flow in raw['flows']) {
-      if (flow['stages'] is List) {
-        flows.add(AuthenticationFlow(List<String>.from(flow['stages'])));
-      }
-    }
-    return flows;
+    return (raw['flows'] as List)
+        .map((flow) => flow['stages'])
+        .whereType<List>()
+        .map((stages) => AuthenticationFlow(List<String>.from(stages)))
+        .toList();
   }
 
   /// This section contains any information that the client will need to know in order to use a given type

lib/src/model/notifications_query_response.dart

@@ -29,10 +29,9 @@ class NotificationsQueryResponse {
 
   NotificationsQueryResponse.fromJson(Map<String, dynamic> json) {
     nextToken = json['next_token'];
-    notifications = <Notification>[];
-    json['notifications'].forEach((v) {
-      notifications.add(Notification.fromJson(v));
-    });
+    notifications = (json['notifications'] as List)
+        .map((v) => Notification.fromJson(v))
+        .toList();
   }
 
   Map<String, dynamic> toJson() {

lib/src/model/public_rooms_response.dart

@@ -28,10 +28,7 @@ class PublicRoomsResponse {
   int totalRoomCountEstimate;
 
   PublicRoomsResponse.fromJson(Map<String, dynamic> json) {
-    chunk = <PublicRoom>[];
-    json['chunk'].forEach((v) {
-      chunk.add(PublicRoom.fromJson(v));
-    });
+    chunk = (json['chunk'] as List).map((v) => PublicRoom.fromJson(v)).toList();
     nextBatch = json['next_batch'];
     prevBatch = json['prev_batch'];
     totalRoomCountEstimate = json['total_room_count_estimate'];

lib/src/model/supported_protocol.dart

@@ -34,10 +34,9 @@ class SupportedProtocol {
     icon = json['icon'];
     fieldTypes = (json['field_types'] as Map)
         .map((k, v) => MapEntry(k, ProtocolFieldType.fromJson(v)));
-    instances = <ProtocolInstance>[];
-    json['instances'].forEach((v) {
-      instances.add(ProtocolInstance.fromJson(v));
-    });
+    instances = (json['instances'] as List)
+        .map((v) => ProtocolInstance.fromJson(v))
+        .toList();
   }
 
   Map<String, dynamic> toJson() {

lib/src/model/user_search_result.dart

@@ -28,11 +28,8 @@ class UserSearchResult {
   bool limited;
 
   UserSearchResult.fromJson(Map<String, dynamic> json) {
-    results = <Profile>[];
-    json['results'].forEach((v) {
-      results.add(Profile.fromJson(v));
-    });
-
+    results =
+        (json['results'] as List).map((v) => Profile.fromJson(v)).toList();
     limited = json['limited'];
   }
 

lib/src/model/who_is_info.dart

@@ -48,10 +48,8 @@ class DeviceInfo {
 
   DeviceInfo.fromJson(Map<String, dynamic> json) {
     if (json['sessions'] != null) {
-      sessions = <Sessions>[];
-      json['sessions'].forEach((v) {
-        sessions.add(Sessions.fromJson(v));
-      });
+      sessions =
+          (json['sessions'] as List).map((v) => Sessions.fromJson(v)).toList();
     }
   }
 
@@ -69,10 +67,9 @@ class Sessions {
 
   Sessions.fromJson(Map<String, dynamic> json) {
     if (json['connections'] != null) {
-      connections = <Connections>[];
-      json['connections'].forEach((v) {
-        connections.add(Connections.fromJson(v));
-      });
+      connections = (json['connections'] as List)
+          .map((v) => Connections.fromJson(v))
+          .toList();
     }
   }
 

lib/src/utils/map_copy_extension.dart

@@ -27,11 +27,7 @@ extension MapCopyExtension on Map<String, dynamic> {
       return value.copy();
     }
     if (value is List) {
-      final ret = [];
-      for (final val in value) {
-        ret.add(_copyValue(val));
-      }
-      return ret;
+      return value.map(_copyValue).toList();
     }
     return value;
   }