add invite support

Closes #82

lib/models/content/membership.dart

@@ -20,6 +20,7 @@ sealed class MembershipContent extends Content with _$MembershipContent {
     @JsonKey(name: "membership") required MembershipStatus status,
     Uri? avatarUrl,
     String? reason,
+    @Default(false) bool isDirect,
   }) = _MembershipContent;
 
   factory MembershipContent.fromJson(Map<String, Object?> json) =>

lib/models/invited_room.dart

@@ -0,0 +1,16 @@
+import "package:fast_immutable_collections/fast_immutable_collections.dart";
+import "package:freezed_annotation/freezed_annotation.dart";
+import "package:nexus/models/matrix_event.dart";
+
+part "invited_room.freezed.dart";
+part "invited_room.g.dart";
+
+@Freezed(toJson: false, fromJson: false)
+@JsonSerializable(createToJson: false)
+class const InvitedRoom({
+  required final String roomId,
+  final IList<MatrixEvent> inviteState = const .empty(),
+}) with _$InvitedRoom {
+  factory InvitedRoom.fromJson(Map<String, Object?> json) =>
+      _$InvitedRoomFromJson(json);
+}

lib/models/matrix_event.dart

@@ -0,0 +1,28 @@
+import "package:freezed_annotation/freezed_annotation.dart";
+import "package:nexus/models/content/content.dart";
+import "package:nexus/models/epoch_date_time_converter.dart";
+
+part "matrix_event.freezed.dart";
+part "matrix_event.g.dart";
+
+/// A plain Matrix event, as sent by the server (e.g. stripped invite state).
+///
+/// Unlike [Event], this isn't stored in the gomuks database, so it has no row
+/// IDs or local content.
+@Freezed(toJson: false, fromJson: false)
+@JsonSerializable(createToJson: false)
+class const MatrixEvent({
+  required final String type,
+  final String? stateKey,
+  final String? sender,
+  final String? eventId,
+  final String? roomId,
+  @JsonKey(name: "origin_server_ts")
+  @EpochDateTimeConverter()
+  final DateTime? timestamp,
+  required final Content content,
+}) with _$MatrixEvent {
+  factory MatrixEvent.fromJson(Map<String, dynamic> json) =>
+      _$MatrixEventFromJson(json)
+          .copyWith(content: .fromEventJson(json["content"], json["type"]));
+}

lib/models/nav_page.dart

@@ -4,5 +4,6 @@ import "package:flutter_riverpod/flutter_riverpod.dart";
 abstract class const NavPage({super.key}) extends Widget {
   String get title;
   IconData get icon;
-  Future<int>? badgeBuilder(WidgetRef ref) => null;
+
+  int? badgeCount(WidgetRef ref) => null;
 }

lib/models/requests/join_room.dart

@@ -9,6 +9,9 @@ part "join_room.g.dart";
 class const JoinRoomRequest({
   required final String roomIdOrAlias,
   final IList<String> via = const IList.empty(),
+
+  /// Set when accepting an invite, so gomuks can mark DMs as such.
+  final bool fromInvite = false,
 }) with _$JoinRoomRequest {
   Map<String, Object?> toJson() => _$JoinRoomRequestToJson(this);
 

lib/models/room_summary.dart

@@ -1,12 +1,14 @@
 import "package:freezed_annotation/freezed_annotation.dart";
 import "package:nexus/models/content/create.dart";
+import "package:nexus/models/content/membership.dart";
 import "package:nexus/models/join_rule.dart";
+import "package:nexus/models/membership_status.dart";
 
 part "room_summary.freezed.dart";
 part "room_summary.g.dart";
 
 @Freezed(toJson: false, fromJson: false)
-@JsonSerializable()
+@JsonSerializable(createToJson: false)
 class const RoomSummary({
   required final String roomId,
   @JsonKey(name: "num_joined_members") final int? joinedMembers,
@@ -17,9 +19,24 @@ class const RoomSummary({
   final String? topic,
   final String? roomVersion,
   @JsonKey(unknownEnumValue: RoomType.room) final RoomType? roomType,
-}) with _$RoomSummary {
-  Map<String, Object?> toJson() => _$RoomSummaryToJson(this);
 
+  /// The encryption algorithm, if the room is encrypted.
+  final String? encryption,
+  final bool? worldReadable,
+
+  /// The current user's membership in the room, if any.
+  @JsonKey(unknownEnumValue: JsonKey.nullForUndefinedEnumValue)
+  final MembershipStatus? membership,
+
+  /// Who invited the current user, for invites.
+  @JsonKey(includeFromJson: false) final String? invitedBy,
+
+  /// The inviter's membership, for their display name and avatar.
+  @JsonKey(includeFromJson: false) final MembershipContent? inviterProfile,
+
+  /// Whether this is an invite to a direct message.
+  @JsonKey(includeFromJson: false) final bool isDirect = false,
+}) with _$RoomSummary {
   factory RoomSummary.fromJson(Map<String, Object?> json) =>
       _$RoomSummaryFromJson(json);
 }

lib/models/sidebar_page.dart

@@ -0,0 +1 @@
+enum SidebarPage { rooms, notifications, invites }

lib/models/sync_data.dart

@@ -1,5 +1,6 @@
 import "package:fast_immutable_collections/fast_immutable_collections.dart";
 import "package:freezed_annotation/freezed_annotation.dart";
+import "package:nexus/models/invited_room.dart";
 import "package:nexus/models/room.dart";
 import "package:nexus/models/space_edge.dart";
 
@@ -7,17 +8,16 @@ part "sync_data.freezed.dart";
 part "sync_data.g.dart";
 
 @Freezed(toJson: false, fromJson: false)
-@JsonSerializable()
+@JsonSerializable(createToJson: false)
 class const SyncData({
   final bool clearState = false,
   final IMap<String, IMap<String, dynamic>> accountData = const IMap.empty(),
   final IMap<String, Room> rooms = const IMap.empty(),
   final ISet<String> leftRooms = const ISet.empty(),
+  final IList<InvitedRoom> invitedRooms = const IList.empty(),
   final IMap<String, IList<SpaceEdge>>? spaceEdges,
   final IList<String>? topLevelSpaces,
 }) with _$SyncData {
-  Map<String, Object?> toJson() => _$SyncDataToJson(this);
-
   factory SyncData.fromJson(Map<String, Object?> json) =>
       _$SyncDataFromJson(json);
 }