fix: wrong types in spaces hierarchy API

BREAKING CHANGE (because from is now optional, so it can't be specified
conditionally)

See also:

- matrix-org/matrix-spec#1110
- matrix-org/matrix-spec#1097

generated/api.dart

@@ -98,10 +98,7 @@ class Api {
   /// [from] A pagination token from a previous result. If specified, `max_depth` and `suggested_only` cannot
   /// be changed from the first request.
   Future<GetSpaceHierarchyResponse> getSpaceHierarchy(String roomId,
-      {bool? suggestedOnly,
-      double? limit,
-      double? maxDepth,
-      String? from}) async {
+      {bool? suggestedOnly, int? limit, int? maxDepth, String? from}) async {
     final requestUri = Uri(
         path:
             '_matrix/client/v1/rooms/${Uri.encodeComponent(roomId)}/hierarchy',
@@ -3234,6 +3231,10 @@ class Api {
   /// by a previous request to this endpoint, though servers are not
   /// required to support this. Clients should not rely on the behaviour.
   ///
+  /// If it is not provided, the homeserver shall return a list of messages
+  /// from the first or last (per the value of the `dir` parameter) visible
+  /// event in the room history for the requesting user.
+  ///
   /// [to] The token to stop returning events at. This token can be obtained from
   /// a `prev_batch` or `next_batch` token returned by the `/sync` endpoint,
   /// or from an `end` token returned by a previous request to this endpoint.
@@ -3246,13 +3247,12 @@ class Api {
   /// [limit] The maximum number of events to return. Default: 10.
   ///
   /// [filter] A JSON RoomEventFilter to filter returned events with.
-  Future<GetRoomEventsResponse> getRoomEvents(
-      String roomId, String from, Direction dir,
-      {String? to, int? limit, String? filter}) async {
+  Future<GetRoomEventsResponse> getRoomEvents(String roomId, Direction dir,
+      {String? from, String? to, int? limit, String? filter}) async {
     final requestUri = Uri(
         path: '_matrix/client/v3/rooms/${Uri.encodeComponent(roomId)}/messages',
         queryParameters: {
-          'from': from,
+          if (from != null) 'from': from,
           if (to != null) 'to': to,
           'dir': dir.name,
           if (limit != null) 'limit': limit.toString(),

generated/model.dart

@@ -164,18 +164,21 @@ class PublicRoomsChunk {
 class SpaceRoomsChunkBase {
   SpaceRoomsChunkBase({
     required this.childrenState,
-    required this.roomType,
+    this.roomType,
   });
 
   SpaceRoomsChunkBase.fromJson(Map<String, dynamic> json)
       : childrenState = (json['children_state'] as List)
             .map((v) => MatrixEvent.fromJson(v))
             .toList(),
-        roomType = json['room_type'] as String;
-  Map<String, dynamic> toJson() => {
-        'children_state': childrenState.map((v) => v.toJson()).toList(),
-        'room_type': roomType,
-      };
+        roomType = ((v) => v != null ? v as String : null)(json['room_type']);
+  Map<String, dynamic> toJson() {
+    final roomType = this.roomType;
+    return {
+      'children_state': childrenState.map((v) => v.toJson()).toList(),
+      if (roomType != null) 'room_type': roomType,
+    };
+  }
 
   /// The [`m.space.child`](#mspacechild) events of the space-room, represented
   /// as [Stripped State Events](#stripped-state) with an added `origin_server_ts` key.
@@ -184,7 +187,7 @@ class SpaceRoomsChunkBase {
   List<MatrixEvent> childrenState;
 
   /// The `type` of room (from [`m.room.create`](https://spec.matrix.org/unstable/client-server-api/#mroomcreate)), if any.
-  String roomType;
+  String? roomType;
 }
 
 @_NameSource('rule override generated')
@@ -200,7 +203,7 @@ class SpaceRoomsChunk implements PublicRoomsChunk, SpaceRoomsChunkBase {
     this.topic,
     required this.worldReadable,
     required this.childrenState,
-    required this.roomType,
+    this.roomType,
   });
 
   SpaceRoomsChunk.fromJson(Map<String, dynamic> json)
@@ -218,13 +221,14 @@ class SpaceRoomsChunk implements PublicRoomsChunk, SpaceRoomsChunkBase {
         childrenState = (json['children_state'] as List)
             .map((v) => MatrixEvent.fromJson(v))
             .toList(),
-        roomType = json['room_type'] as String;
+        roomType = ((v) => v != null ? v as String : null)(json['room_type']);
   Map<String, dynamic> toJson() {
     final avatarUrl = this.avatarUrl;
     final canonicalAlias = this.canonicalAlias;
     final joinRule = this.joinRule;
     final name = this.name;
     final topic = this.topic;
+    final roomType = this.roomType;
     return {
       if (avatarUrl != null) 'avatar_url': avatarUrl.toString(),
       if (canonicalAlias != null) 'canonical_alias': canonicalAlias,
@@ -236,7 +240,7 @@ class SpaceRoomsChunk implements PublicRoomsChunk, SpaceRoomsChunkBase {
       if (topic != null) 'topic': topic,
       'world_readable': worldReadable,
       'children_state': childrenState.map((v) => v.toJson()).toList(),
-      'room_type': roomType,
+      if (roomType != null) 'room_type': roomType,
     };
   }
 
@@ -277,7 +281,7 @@ class SpaceRoomsChunk implements PublicRoomsChunk, SpaceRoomsChunkBase {
   List<MatrixEvent> childrenState;
 
   /// The `type` of room (from [`m.room.create`](https://spec.matrix.org/unstable/client-server-api/#mroomcreate)), if any.
-  String roomType;
+  String? roomType;
 }
 
 @_NameSource('generated')