Channel link autocomplete

lib/api/model/events.dart

@@ -616,9 +616,14 @@ class ChannelDeleteEvent extends ChannelEvent {
   @JsonKey(includeToJson: true)
   String get op => 'delete';
 
-  final List<ZulipStream> streams;
+  final List<ZulipStreamId>? streams; // TODO(server-10): remove
+  final List<int>? streamIds; // TODO(server-10): remove nullability
 
-  ChannelDeleteEvent({required super.id, required this.streams});
+  ChannelDeleteEvent({
+    required super.id,
+    required this.streams,
+    required this.streamIds,
+  }) : assert(streams != null || streamIds != null);
 
   factory ChannelDeleteEvent.fromJson(Map<String, dynamic> json) =>
     _$ChannelDeleteEventFromJson(json);
@@ -627,6 +632,18 @@ class ChannelDeleteEvent extends ChannelEvent {
   Map<String, dynamic> toJson() => _$ChannelDeleteEventToJson(this);
 }
 
+@JsonSerializable(fieldRename: FieldRename.snake)
+class ZulipStreamId {
+  final int streamId;
+
+  ZulipStreamId({required this.streamId});
+
+  factory ZulipStreamId.fromJson(Map<String, dynamic> json) =>
+    _$ZulipStreamIdFromJson(json);
+
+  Map<String, dynamic> toJson() => _$ZulipStreamIdToJson(this);
+}
+
 /// A [ChannelEvent] with op `update`: https://zulip.com/api/get-events#stream-update
 @JsonSerializable(fieldRename: FieldRename.snake)
 class ChannelUpdateEvent extends ChannelEvent {
@@ -683,6 +700,8 @@ class ChannelUpdateEvent extends ChannelEvent {
         return value as int?;
       case ChannelPropertyName.channelPostPolicy:
         return ChannelPostPolicy.fromApiValue(value as int);
+      case ChannelPropertyName.isRecentlyActive:
+        return value as bool?;
       case ChannelPropertyName.folderId:
         return value as int?;
       case ChannelPropertyName.canAddSubscribersGroup:

lib/api/model/model.dart

@@ -652,6 +652,7 @@ class ZulipStream {
   @JsonKey(name: 'stream_post_policy')
   ChannelPostPolicy? channelPostPolicy; // TODO(server-10) remove
   // final bool isAnnouncementOnly; // deprecated for `channelPostPolicy`; ignore
+  bool? isRecentlyActive; // TODO(server-10)
 
   GroupSettingValue? canAddSubscribersGroup; // TODO(server-10)
   GroupSettingValue? canDeleteAnyMessageGroup; // TODO(server-11)
@@ -675,6 +676,7 @@ class ZulipStream {
     required this.historyPublicToSubscribers,
     required this.messageRetentionDays,
     required this.channelPostPolicy,
+    required this.isRecentlyActive,
     required this.folderId,
     required this.canAddSubscribersGroup,
     required this.canDeleteAnyMessageGroup,
@@ -699,6 +701,7 @@ class ZulipStream {
       historyPublicToSubscribers: subscription.historyPublicToSubscribers,
       messageRetentionDays: subscription.messageRetentionDays,
       channelPostPolicy: subscription.channelPostPolicy,
+      isRecentlyActive: subscription.isRecentlyActive,
       folderId: subscription.folderId,
       canAddSubscribersGroup: subscription.canAddSubscribersGroup,
       canDeleteAnyMessageGroup: subscription.canDeleteAnyMessageGroup,
@@ -736,6 +739,7 @@ enum ChannelPropertyName {
   messageRetentionDays,
   @JsonValue('stream_post_policy')
   channelPostPolicy,
+  isRecentlyActive,
   folderId,
   canAddSubscribersGroup,
   canDeleteAnyMessageGroup,
@@ -821,6 +825,7 @@ class Subscription extends ZulipStream {
     required super.historyPublicToSubscribers,
     required super.messageRetentionDays,
     required super.channelPostPolicy,
+    required super.isRecentlyActive,
     required super.folderId,
     required super.canAddSubscribersGroup,
     required super.canDeleteAnyMessageGroup,

lib/basic.dart

@@ -66,3 +66,6 @@ class OptionSome<T> extends Option<T> {
   @override
   String toString() => 'OptionSome($value)';
 }
+
+/// Returns [object] as [T] if it matches the type, otherwise `null`.
+T? tryCast<T>(dynamic object) => object is T ? object : null;