Migrated llc Lists to be nullable instead of being an empty array

packages/stream_chat/lib/src/core/models/attachment.dart

@@ -124,8 +124,7 @@ class Attachment extends Equatable {
   final String? assetUrl;
 
   /// Actions from a command
-  @JsonKey(defaultValue: [])
-  final List<Action> actions;
+  final List<Action>? actions;
 
   final Uri? localUri;
 

packages/stream_chat/lib/src/core/models/attachment.g.dart

@@ -26,9 +26,8 @@ Attachment _$AttachmentFromJson(Map<String, dynamic> json) => Attachment(
       authorIcon: json['author_icon'] as String?,
       assetUrl: json['asset_url'] as String?,
       actions: (json['actions'] as List<dynamic>?)
-              ?.map((e) => Action.fromJson(e as Map<String, dynamic>))
-              .toList() ??
-          [],
+          ?.map((e) => Action.fromJson(e as Map<String, dynamic>))
+          .toList(),
       extraData: json['extra_data'] as Map<String, dynamic>? ?? const {},
       file: json['file'] == null
           ? null
@@ -64,7 +63,7 @@ Map<String, dynamic> _$AttachmentToJson(Attachment instance) {
   writeNotNull('author_link', instance.authorLink);
   writeNotNull('author_icon', instance.authorIcon);
   writeNotNull('asset_url', instance.assetUrl);
-  val['actions'] = instance.actions.map((e) => e.toJson()).toList();
+  writeNotNull('actions', instance.actions?.map((e) => e.toJson()).toList());
   writeNotNull('file', instance.file?.toJson());
   val['upload_state'] = instance.uploadState.toJson();
   val['extra_data'] = instance.extraData;

packages/stream_chat/lib/src/core/models/channel_state.dart

@@ -7,42 +7,40 @@ import 'package:stream_chat/src/core/models/user.dart';
 
 part 'channel_state.g.dart';
 
-const _emptyPinnedMessages = <Message>[];
-
 /// The class that contains the information about a channel
 @JsonSerializable()
 class ChannelState {
   /// Constructor used for json serialization
   ChannelState({
     this.channel,
-    this.messages = const [],
-    this.members = const [],
-    this.pinnedMessages = _emptyPinnedMessages,
+    this.messages,
+    this.members,
+    this.pinnedMessages,
     this.watcherCount,
-    this.watchers = const [],
-    this.read = const [],
+    this.watchers,
+    this.read,
   });
 
   /// The channel to which this state belongs
   final ChannelModel? channel;
 
   /// A paginated list of channel messages
-  final List<Message> messages;
+  final List<Message>? messages;
 
   /// A paginated list of channel members
-  final List<Member> members;
+  final List<Member>? members;
 
   /// A paginated list of pinned messages
-  final List<Message> pinnedMessages;
+  final List<Message>? pinnedMessages;
 
   /// The count of users watching the channel
   final int? watcherCount;
 
   /// A paginated list of users watching the channel
-  final List<User> watchers;
+  final List<User>? watchers;
 
   /// The list of channel reads
-  final List<Read> read;
+  final List<Read>? read;
 
   /// Create a new instance from a json
   static ChannelState fromJson(Map<String, dynamic> json) =>
@@ -56,7 +54,7 @@ class ChannelState {
     ChannelModel? channel,
     List<Message>? messages,
     List<Member>? members,
-    List<Message> pinnedMessages = _emptyPinnedMessages,
+    List<Message>? pinnedMessages,
     int? watcherCount,
     List<User>? watchers,
     List<Read>? read,
@@ -65,11 +63,7 @@ class ChannelState {
         channel: channel ?? this.channel,
         messages: messages ?? this.messages,
         members: members ?? this.members,
-        // Hack to avoid using the default value in case nothing is provided.
-        // FIXME: Use non-nullable by default instead of empty list.
-        pinnedMessages: pinnedMessages == _emptyPinnedMessages
-            ? this.pinnedMessages
-            : pinnedMessages,
+        pinnedMessages: pinnedMessages ?? this.pinnedMessages,
         watcherCount: watcherCount ?? this.watcherCount,
         watchers: watchers ?? this.watchers,
         read: read ?? this.read,

packages/stream_chat/lib/src/core/models/channel_state.g.dart

@@ -11,36 +11,31 @@ ChannelState _$ChannelStateFromJson(Map<String, dynamic> json) => ChannelState(
           ? null
           : ChannelModel.fromJson(json['channel'] as Map<String, dynamic>),
       messages: (json['messages'] as List<dynamic>?)
-              ?.map((e) => Message.fromJson(e as Map<String, dynamic>))
-              .toList() ??
-          const [],
+          ?.map((e) => Message.fromJson(e as Map<String, dynamic>))
+          .toList(),
       members: (json['members'] as List<dynamic>?)
-              ?.map((e) => Member.fromJson(e as Map<String, dynamic>))
-              .toList() ??
-          const [],
+          ?.map((e) => Member.fromJson(e as Map<String, dynamic>))
+          .toList(),
       pinnedMessages: (json['pinned_messages'] as List<dynamic>?)
-              ?.map((e) => Message.fromJson(e as Map<String, dynamic>))
-              .toList() ??
-          _emptyPinnedMessages,
+          ?.map((e) => Message.fromJson(e as Map<String, dynamic>))
+          .toList(),
       watcherCount: json['watcher_count'] as int?,
       watchers: (json['watchers'] as List<dynamic>?)
-              ?.map((e) => User.fromJson(e as Map<String, dynamic>))
-              .toList() ??
-          const [],
+          ?.map((e) => User.fromJson(e as Map<String, dynamic>))
+          .toList(),
       read: (json['read'] as List<dynamic>?)
-              ?.map((e) => Read.fromJson(e as Map<String, dynamic>))
-              .toList() ??
-          const [],
+          ?.map((e) => Read.fromJson(e as Map<String, dynamic>))
+          .toList(),
     );
 
 Map<String, dynamic> _$ChannelStateToJson(ChannelState instance) =>
     <String, dynamic>{
       'channel': instance.channel?.toJson(),
-      'messages': instance.messages.map((e) => e.toJson()).toList(),
-      'members': instance.members.map((e) => e.toJson()).toList(),
+      'messages': instance.messages?.map((e) => e.toJson()).toList(),
+      'members': instance.members?.map((e) => e.toJson()).toList(),
       'pinned_messages':
-          instance.pinnedMessages.map((e) => e.toJson()).toList(),
+          instance.pinnedMessages?.map((e) => e.toJson()).toList(),
       'watcher_count': instance.watcherCount,
-      'watchers': instance.watchers.map((e) => e.toJson()).toList(),
-      'read': instance.read.map((e) => e.toJson()).toList(),
+      'watchers': instance.watchers?.map((e) => e.toJson()).toList(),
+      'read': instance.read?.map((e) => e.toJson()).toList(),
     };

packages/stream_chat/lib/src/core/models/message.g.dart

@@ -49,6 +49,9 @@ Message _$MessageFromJson(Map<String, dynamic> json) => Message(
       updatedAt: json['updated_at'] == null
           ? null
           : DateTime.parse(json['updated_at'] as String),
+      deletedAt: json['deleted_at'] == null
+          ? null
+          : DateTime.parse(json['deleted_at'] as String),
       user: json['user'] == null
           ? null
           : User.fromJson(json['user'] as Map<String, dynamic>),
@@ -63,9 +66,6 @@ Message _$MessageFromJson(Map<String, dynamic> json) => Message(
           ? null
           : User.fromJson(json['pinned_by'] as Map<String, dynamic>),
       extraData: json['extra_data'] as Map<String, dynamic>? ?? const {},
-      deletedAt: json['deleted_at'] == null
-          ? null
-          : DateTime.parse(json['deleted_at'] as String),
       i18n: (json['i18n'] as Map<String, dynamic>?)?.map(
         (k, e) => MapEntry(k, e as String),
       ),
@@ -99,6 +99,7 @@ Map<String, dynamic> _$MessageToJson(Message instance) {
   val['silent'] = instance.silent;
   writeNotNull('shadowed', readonly(instance.shadowed));
   writeNotNull('command', readonly(instance.command));
+  writeNotNull('deleted_at', readonly(instance.deletedAt));
   writeNotNull('created_at', readonly(instance.createdAt));
   writeNotNull('updated_at', readonly(instance.updatedAt));
   writeNotNull('user', readonly(instance.user));
@@ -107,7 +108,6 @@ Map<String, dynamic> _$MessageToJson(Message instance) {
   val['pin_expires'] = instance.pinExpires?.toIso8601String();
   val['pinned_by'] = readonly(instance.pinnedBy);
   val['extra_data'] = instance.extraData;
-  writeNotNull('deleted_at', readonly(instance.deletedAt));
   writeNotNull('i18n', instance.i18n);
   return val;
 }