added null safety for llc

packages/stream_chat/lib/src/models/action.dart

@@ -12,19 +12,19 @@ class Action {
   factory Action.fromJson(Map<String, dynamic> json) => _$ActionFromJson(json);
 
   /// The name of the action
-  final String name;
+  final String? name;
 
   /// The style of the action
-  final String style;
+  final String? style;
 
   /// The test of the action
-  final String text;
+  final String? text;
 
   /// The type of the action
-  final String type;
+  final String? type;
 
   /// The value of the action
-  final String value;
+  final String? value;
 
   /// Serialize to json
   Map<String, dynamic> toJson() => _$ActionToJson(this);

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

@@ -13,10 +13,10 @@ part 'attachment.g.dart';
 class Attachment {
   /// Constructor used for json serialization
   Attachment({
-    String id,
+    String? id,
     this.type,
     this.titleLink,
-    String title,
+    String? title,
     this.thumbUrl,
     this.text,
     this.pretext,
@@ -34,10 +34,10 @@ class Attachment {
     this.actions,
     this.extraData,
     this.file,
-    UploadState uploadState,
+    UploadState? uploadState,
   })  : id = id ?? const Uuid().v4(),
         title = title ?? file?.name,
-        localUri = file?.path != null ? Uri.parse(file.path) : null {
+        localUri = file?.path != null ? Uri.parse(file!.path!) : null {
     this.uploadState = uploadState ??
         ((assetUrl != null || imageUrl != null)
             ? const UploadState.success()
@@ -47,68 +47,68 @@ class Attachment {
   /// Create a new instance from a json
   factory Attachment.fromJson(Map<String, dynamic> json) =>
       _$AttachmentFromJson(
-          Serialization.moveToExtraDataFromRoot(json, topLevelFields));
+          Serialization.moveToExtraDataFromRoot(json, topLevelFields)!);
 
   /// Create a new instance from a db data
   factory Attachment.fromData(Map<String, dynamic> json) =>
       _$AttachmentFromJson(Serialization.moveToExtraDataFromRoot(
-          json, topLevelFields + dbSpecificTopLevelFields));
+          json, topLevelFields + dbSpecificTopLevelFields)!);
 
   ///The attachment type based on the URL resource. This can be: audio,
   ///image or video
-  final String type;
+  final String? type;
 
   ///The link to which the attachment message points to.
-  final String titleLink;
+  final String? titleLink;
 
   /// The attachment title
-  final String title;
+  final String? title;
 
   /// The URL to the attached file thumbnail. You can use this to represent the
   /// attached link.
-  final String thumbUrl;
+  final String? thumbUrl;
 
   /// The attachment text. It will be displayed in the channel next to the
   /// original message.
-  final String text;
+  final String? text;
 
   /// Optional text that appears above the attachment block
-  final String pretext;
+  final String? pretext;
 
   /// The original URL that was used to scrape this attachment.
-  final String ogScrapeUrl;
+  final String? ogScrapeUrl;
 
   /// The URL to the attached image. This is present for URL pointing to an
   /// image article (eg. Unsplash)
-  final String imageUrl;
-  final String footerIcon;
-  final String footer;
+  final String? imageUrl;
+  final String? footerIcon;
+  final String? footer;
   final dynamic fields;
-  final String fallback;
-  final String color;
+  final String? fallback;
+  final String? color;
 
   /// The name of the author.
-  final String authorName;
-  final String authorLink;
-  final String authorIcon;
+  final String? authorName;
+  final String? authorLink;
+  final String? authorIcon;
 
   /// The URL to the audio, video or image related to the URL.
-  final String assetUrl;
+  final String? assetUrl;
 
   /// Actions from a command
-  final List<Action> actions;
+  final List<Action>? actions;
 
-  final Uri localUri;
+  final Uri? localUri;
 
   /// The file present inside this attachment.
-  final AttachmentFile file;
+  final AttachmentFile? file;
 
   /// The current upload state of the attachment
-  UploadState uploadState;
+  UploadState? uploadState;
 
   /// Map of custom channel extraData
   @JsonKey(includeIfNull: false)
-  final Map<String, dynamic> extraData;
+  final Map<String, dynamic>? extraData;
 
   /// The attachment ID.
   ///
@@ -156,28 +156,28 @@ class Attachment {
       _$AttachmentToJson(this), topLevelFields + dbSpecificTopLevelFields);
 
   Attachment copyWith({
-    String id,
-    String type,
-    String titleLink,
-    String title,
-    String thumbUrl,
-    String text,
-    String pretext,
-    String ogScrapeUrl,
-    String imageUrl,
-    String footerIcon,
-    String footer,
+    String? id,
+    String? type,
+    String? titleLink,
+    String? title,
+    String? thumbUrl,
+    String? text,
+    String? pretext,
+    String? ogScrapeUrl,
+    String? imageUrl,
+    String? footerIcon,
+    String? footer,
     dynamic fields,
-    String fallback,
-    String color,
-    String authorName,
-    String authorLink,
-    String authorIcon,
-    String assetUrl,
-    List<Action> actions,
-    AttachmentFile file,
-    UploadState uploadState,
-    Map<String, dynamic> extraData,
+    String? fallback,
+    String? color,
+    String? authorName,
+    String? authorLink,
+    String? authorIcon,
+    String? assetUrl,
+    List<Action>? actions,
+    AttachmentFile? file,
+    UploadState? uploadState,
+    Map<String, dynamic>? extraData,
   }) =>
       Attachment(
         id: id ?? this.id,

packages/stream_chat/lib/src/models/attachment_file.dart

@@ -19,7 +19,7 @@ abstract class UploadState with _$UploadState {
   const factory UploadState.success() = Success;
 
   /// Failed state of the union
-  const factory UploadState.failed({@required String error}) = Failed;
+  const factory UploadState.failed({required String error}) = Failed;
 
   /// Creates a new instance from a json
   factory UploadState.fromJson(Map<String, dynamic> json) =>
@@ -27,7 +27,7 @@ abstract class UploadState with _$UploadState {
 }
 
 /// Helper extension for UploadState
-extension UploadStateX on UploadState {
+extension UploadStateX on UploadState? {
   /// Returns true if state is [Preparing]
   bool get isPreparing => this is Preparing;
 
@@ -65,21 +65,21 @@ class AttachmentFile {
   /// ```
   /// final File myFile = File(platformFile.path);
   /// ```
-  final String path;
+  final String? path;
 
   /// File name including its extension.
-  final String name;
+  final String? name;
 
   /// Byte data for this file. Particularly useful if you want to manipulate
   /// its data or easily upload to somewhere else.
   @JsonKey(toJson: _toString, fromJson: _fromString)
-  final Uint8List bytes;
+  final Uint8List? bytes;
 
   /// The file size in bytes.
-  final int size;
+  final int? size;
 
   /// File extension for this file.
-  String get extension => name?.split('.')?.last;
+  String? get extension => name?.split('.')?.last;
 
   /// Serialize to json
   Map<String, dynamic> toJson() => _$AttachmentFileToJson(this);

packages/stream_chat/lib/src/models/channel_config.dart

@@ -30,52 +30,52 @@ class ChannelConfig {
       _$ChannelConfigFromJson(json);
 
   /// Moderation configuration
-  final String automod;
+  final String? automod;
 
   /// List of available commands
-  final List<Command> commands;
+  final List<Command>? commands;
 
   /// True if the channel should send connect events
-  final bool connectEvents;
+  final bool? connectEvents;
 
   /// Date of channel creation
-  final DateTime createdAt;
+  final DateTime? createdAt;
 
   /// Date of last channel update
-  final DateTime updatedAt;
+  final DateTime? updatedAt;
 
   /// Max channel message length
-  final int maxMessageLength;
+  final int? maxMessageLength;
 
   /// Duration of message retention
-  final String messageRetention;
+  final String? messageRetention;
 
   /// True if users can be muted
-  final bool mutes;
+  final bool? mutes;
 
   /// Name of the channel
-  final String name;
+  final String? name;
 
   /// True if reaction are active for this channel
-  final bool reactions;
+  final bool? reactions;
 
   /// True if readEvents are active for this channel
-  final bool readEvents;
+  final bool? readEvents;
 
   /// True if reply message are active for this channel
-  final bool replies;
+  final bool? replies;
 
   /// True if it's possible to perform a search in this channel
-  final bool search;
+  final bool? search;
 
   /// True if typing events should be sent for this channel
-  final bool typingEvents;
+  final bool? typingEvents;
 
   /// True if it's possible to upload files to this channel
-  final bool uploads;
+  final bool? uploads;
 
   /// True if urls appears as attachments
-  final bool urlEnrichment;
+  final bool? urlEnrichment;
 
   /// Serialize to json
   Map<String, dynamic> toJson() => _$ChannelConfigToJson(this);

packages/stream_chat/lib/src/models/channel_model.dart

@@ -26,59 +26,59 @@ class ChannelModel {
   });
 
   /// Create a new instance from a json
-  factory ChannelModel.fromJson(Map<String, dynamic> json) =>
+  factory ChannelModel.fromJson(Map<String, dynamic>? json) =>
       _$ChannelModelFromJson(
-          Serialization.moveToExtraDataFromRoot(json, topLevelFields));
+          Serialization.moveToExtraDataFromRoot(json, topLevelFields)!);
 
   /// The id of this channel
-  final String id;
+  final String? id;
 
   /// The type of this channel
-  final String type;
+  final String? type;
 
   /// The cid of this channel
   @JsonKey(includeIfNull: false, toJson: Serialization.readOnly)
-  final String cid;
+  final String? cid;
 
   /// The channel configuration data
   @JsonKey(includeIfNull: false, toJson: Serialization.readOnly)
-  final ChannelConfig config;
+  final ChannelConfig? config;
 
   /// The user that created this channel
   @JsonKey(includeIfNull: false, toJson: Serialization.readOnly)
-  final User createdBy;
+  final User? createdBy;
 
   /// True if this channel is frozen
   @JsonKey(includeIfNull: false)
-  final bool frozen;
+  final bool? frozen;
 
   /// The date of the last message
   @JsonKey(includeIfNull: false, toJson: Serialization.readOnly)
-  final DateTime lastMessageAt;
+  final DateTime? lastMessageAt;
 
   /// The date of channel creation
   @JsonKey(includeIfNull: false, toJson: Serialization.readOnly)
-  final DateTime createdAt;
+  final DateTime? createdAt;
 
   /// The date of the last channel update
   @JsonKey(includeIfNull: false, toJson: Serialization.readOnly)
-  final DateTime updatedAt;
+  final DateTime? updatedAt;
 
   /// The date of channel deletion
   @JsonKey(includeIfNull: false, toJson: Serialization.readOnly)
-  final DateTime deletedAt;
+  final DateTime? deletedAt;
 
   /// The count of this channel members
   @JsonKey(includeIfNull: false, toJson: Serialization.readOnly)
-  final int memberCount;
+  final int? memberCount;
 
   /// Map of custom channel extraData
   @JsonKey(includeIfNull: false)
-  final Map<String, dynamic> extraData;
+  final Map<String, dynamic>? extraData;
 
   /// The team the channel belongs to
   @JsonKey(includeIfNull: false, toJson: Serialization.readOnly)
-  final String team;
+  final String? team;
 
   /// Known top level fields.
   /// Useful for [Serialization] methods.
@@ -98,8 +98,8 @@ class ChannelModel {
   ];
 
   /// Shortcut for channel name
-  String get name =>
-      extraData?.containsKey('name') == true ? extraData['name'] : cid;
+  String? get name =>
+      extraData?.containsKey('name') == true ? extraData!['name'] : cid;
 
   /// Serialize to json
   Map<String, dynamic> toJson() => Serialization.moveFromExtraDataToRoot(
@@ -109,19 +109,19 @@ class ChannelModel {
 
   /// Creates a copy of [ChannelModel] with specified attributes overridden.
   ChannelModel copyWith({
-    String id,
-    String type,
-    String cid,
-    ChannelConfig config,
-    User createdBy,
-    bool frozen,
-    DateTime lastMessageAt,
-    DateTime createdAt,
-    DateTime updatedAt,
-    DateTime deletedAt,
-    int memberCount,
-    Map<String, dynamic> extraData,
-    String team,
+    String? id,
+    String? type,
+    String? cid,
+    ChannelConfig? config,
+    User? createdBy,
+    bool? frozen,
+    DateTime? lastMessageAt,
+    DateTime? createdAt,
+    DateTime? updatedAt,
+    DateTime? deletedAt,
+    int? memberCount,
+    Map<String, dynamic>? extraData,
+    String? team,
   }) =>
       ChannelModel(
         id: id ?? this.id,
@@ -141,7 +141,7 @@ class ChannelModel {
 
   /// Returns a new [ChannelModel] that is a combination of this channelModel
   /// and the given [other] channelModel.
-  ChannelModel merge(ChannelModel other) {
+  ChannelModel merge(ChannelModel? other) {
     if (other == null) return this;
     return copyWith(
       id: other.id,

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

@@ -22,42 +22,42 @@ class ChannelState {
   });
 
   /// The channel to which this state belongs
-  final ChannelModel channel;
+  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;
+  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) =>
-      _$ChannelStateFromJson(json);
+  static ChannelState fromJson(Map<String, dynamic>? json) =>
+      _$ChannelStateFromJson(json!);
 
   /// Serialize to json
   Map<String, dynamic> toJson() => _$ChannelStateToJson(this);
 
   /// Creates a copy of [ChannelState] with specified attributes overridden.
   ChannelState copyWith({
-    ChannelModel channel,
-    List<Message> messages,
-    List<Member> members,
-    List<Message> pinnedMessages,
-    int watcherCount,
-    List<User> watchers,
-    List<Read> read,
+    ChannelModel? channel,
+    List<Message>? messages,
+    List<Member?>? members,
+    List<Message>? pinnedMessages,
+    int? watcherCount,
+    List<User>? watchers,
+    List<Read>? read,
   }) =>
       ChannelState(
         channel: channel ?? this.channel,

packages/stream_chat/lib/src/models/command.dart

@@ -17,13 +17,13 @@ class Command {
       _$CommandFromJson(json);
 
   /// The name of the command
-  final String name;
+  final String? name;
 
   /// The description explaining the command
-  final String description;
+  final String? description;
 
   /// The arguments of the command
-  final String args;
+  final String? args;
 
   /// Serialize to json
   Map<String, dynamic> toJson() => _$CommandToJson(this);

packages/stream_chat/lib/src/models/device.dart

@@ -15,10 +15,10 @@ class Device {
   factory Device.fromJson(Map<String, dynamic> json) => _$DeviceFromJson(json);
 
   /// The id of the device
-  final String id;
+  final String? id;
 
   /// The notification push provider
-  final String pushProvider;
+  final String? pushProvider;
 
   /// Serialize to json
   Map<String, dynamic> toJson() => _$DeviceToJson(this);

packages/stream_chat/lib/src/models/event.dart

@@ -31,68 +31,68 @@ class Event {
   }) : isLocal = true;
 
   /// Create a new instance from a json
-  factory Event.fromJson(Map<String, dynamic> json) =>
+  factory Event.fromJson(Map<String, dynamic>? json) =>
       _$EventFromJson(Serialization.moveToExtraDataFromRoot(
         json,
         topLevelFields,
-      ))
+      )!)
         ..isLocal = false;
 
   /// The type of the event
   /// [EventType] contains some predefined constant types
-  final String type;
+  final String? type;
 
   /// The channel cid to which the event belongs
-  final String cid;
+  final String? cid;
 
   /// The channel id to which the event belongs
-  final String channelId;
+  final String? channelId;
 
   /// The channel type to which the event belongs
-  final String channelType;
+  final String? channelType;
 
   /// The connection id in which the event has been sent
-  final String connectionId;
+  final String? connectionId;
 
   /// The date of creation of the event
-  final DateTime createdAt;
+  final DateTime? createdAt;
 
   /// User object of the health check user
-  final OwnUser me;
+  final OwnUser? me;
 
   /// User object of the current user
-  final User user;
+  final User? user;
 
   /// The message sent with the event
-  final Message message;
+  final Message? message;
 
   /// The channel sent with the event
-  final EventChannel channel;
+  final EventChannel? channel;
 
   /// The member sent with the event
-  final Member member;
+  final Member? member;
 
   /// The reaction sent with the event
-  final Reaction reaction;
+  final Reaction? reaction;
 
   /// The number of unread messages for current user
-  final int totalUnreadCount;
+  final int? totalUnreadCount;
 
   /// User total unread channels
-  final int unreadChannels;
+  final int? unreadChannels;
 
   /// Online status
-  final bool online;
+  final bool? online;
 
   /// The id of the parent message of a thread
-  final String parentId;
+  final String? parentId;
 
   /// True if the event is generated by this client
-  bool isLocal;
+  bool? isLocal;
 
   /// Map of custom channel extraData
   @JsonKey(includeIfNull: false)
-  final Map<String, dynamic> extraData;
+  final Map<String, dynamic>? extraData;
 
   /// Known top level fields.
   /// Useful for [Serialization] methods.
@@ -124,23 +124,23 @@ class Event {
 
   /// Creates a copy of [Event] with specified attributes overridden.
   Event copyWith({
-    String type,
-    String cid,
-    String channelId,
-    String channelType,
-    String connectionId,
-    DateTime createdAt,
-    OwnUser me,
-    User user,
-    Message message,
-    EventChannel channel,
-    Member member,
-    Reaction reaction,
-    int totalUnreadCount,
-    int unreadChannels,
-    bool online,
-    String parentId,
-    Map<String, dynamic> extraData,
+    String? type,
+    String? cid,
+    String? channelId,
+    String? channelType,
+    String? connectionId,
+    DateTime? createdAt,
+    OwnUser? me,
+    User? user,
+    Message? message,
+    EventChannel? channel,
+    Member? member,
+    Reaction? reaction,
+    int? totalUnreadCount,
+    int? unreadChannels,
+    bool? online,
+    String? parentId,
+    Map<String, dynamic>? extraData,
   }) =>
       Event(
         type: type ?? this.type,
@@ -169,18 +169,18 @@ class EventChannel extends ChannelModel {
   /// Constructor used for json serialization
   EventChannel({
     this.members,
-    String id,
-    String type,
-    String cid,
-    ChannelConfig config,
-    User createdBy,
-    bool frozen,
-    DateTime lastMessageAt,
-    DateTime createdAt,
-    DateTime updatedAt,
-    DateTime deletedAt,
-    int memberCount,
-    Map<String, dynamic> extraData,
+    String? id,
+    String? type,
+    String? cid,
+    ChannelConfig? config,
+    User? createdBy,
+    bool? frozen,
+    DateTime? lastMessageAt,
+    DateTime? createdAt,
+    DateTime? updatedAt,
+    DateTime? deletedAt,
+    int? memberCount,
+    Map<String, dynamic>? extraData,
   }) : super(
           id: id,
           type: type,
@@ -197,14 +197,14 @@ class EventChannel extends ChannelModel {
         );
 
   /// Create a new instance from a json
-  factory EventChannel.fromJson(Map<String, dynamic> json) =>
+  factory EventChannel.fromJson(Map<String, dynamic>? json) =>
       _$EventChannelFromJson(Serialization.moveToExtraDataFromRoot(
         json,
         topLevelFields,
-      ));
+      )!);
 
   /// A paginated list of channel members
-  final List<Member> members;
+  final List<Member>? members;
 
   /// Known top level fields.
   /// Useful for [Serialization] methods.

packages/stream_chat/lib/src/models/member.dart

@@ -31,51 +31,51 @@ class Member {
   }
 
   /// The interested user
-  final User user;
+  final User? user;
 
   /// The date in which the user accepted the invite to the channel
-  final DateTime inviteAcceptedAt;
+  final DateTime? inviteAcceptedAt;
 
   /// The date in which the user rejected the invite to the channel
-  final DateTime inviteRejectedAt;
+  final DateTime? inviteRejectedAt;
 
   /// True if the user has been invited to the channel
-  final bool invited;
+  final bool? invited;
 
   /// The role of the user in the channel
-  final String role;
+  final String? role;
 
   /// The id of the interested user
-  final String userId;
+  final String? userId;
 
   /// True if the user is a moderator of the channel
-  final bool isModerator;
+  final bool? isModerator;
 
   /// True if the member is banned from the channel
-  final bool banned;
+  final bool? banned;
 
   /// True if the member is shadow banned from the channel
-  final bool shadowBanned;
+  final bool? shadowBanned;
 
   /// The date of creation
-  final DateTime createdAt;
+  final DateTime? createdAt;
 
   /// The last date of update
-  final DateTime updatedAt;
+  final DateTime? updatedAt;
 
   /// Creates a copy of [Member] with specified attributes overridden.
   Member copyWith({
-    User user,
-    DateTime inviteAcceptedAt,
-    DateTime inviteRejectedAt,
-    bool invited,
-    String role,
-    String userId,
-    bool isModerator,
-    DateTime createdAt,
-    DateTime updatedAt,
-    bool banned,
-    bool shadowBanned,
+    User? user,
+    DateTime? inviteAcceptedAt,
+    DateTime? inviteRejectedAt,
+    bool? invited,
+    String? role,
+    String? userId,
+    bool? isModerator,
+    DateTime? createdAt,
+    DateTime? updatedAt,
+    bool? banned,
+    bool? shadowBanned,
   }) =>
       Member(
         user: user ?? this.user,

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

@@ -44,7 +44,7 @@ enum MessageSendingStatus {
 class Message {
   /// Constructor used for json serialization
   Message({
-    String id,
+    String? id,
     this.text,
     this.type,
     this.attachments,
@@ -67,7 +67,7 @@ class Message {
     this.user,
     this.pinned = false,
     this.pinnedAt,
-    DateTime pinExpires,
+    DateTime? pinExpires,
     this.pinnedBy,
     this.extraData,
     this.deletedAt,
@@ -77,15 +77,15 @@ class Message {
         pinExpires = pinExpires?.toUtc();
 
   /// Create a new instance from a json
-  factory Message.fromJson(Map<String, dynamic> json) => _$MessageFromJson(
-      Serialization.moveToExtraDataFromRoot(json, topLevelFields));
+  factory Message.fromJson(Map<String, dynamic>? json) => _$MessageFromJson(
+      Serialization.moveToExtraDataFromRoot(json, topLevelFields)!);
 
   /// The message ID. This is either created by Stream or set client side when
   /// the message is added.
   final String id;
 
   /// The text of this message
-  final String text;
+  final String? text;
 
   /// The status of a sending message
   @JsonKey(ignore: true)
@@ -93,99 +93,99 @@ class Message {
 
   /// The message type
   @JsonKey(includeIfNull: false, toJson: Serialization.readOnly)
-  final String type;
+  final String? type;
 
   /// The list of attachments, either provided by the user or generated from a
   /// command or as a result of URL scraping.
   @JsonKey(includeIfNull: false)
-  final List<Attachment> attachments;
+  final List<Attachment>? attachments;
 
   /// The list of user mentioned in the message
   @JsonKey(toJson: Serialization.userIds)
-  final List<User> mentionedUsers;
+  final List<User>? mentionedUsers;
 
   /// A map describing the count of number of every reaction
   @JsonKey(includeIfNull: false, toJson: Serialization.readOnly)
-  final Map<String, int> reactionCounts;
+  final Map<String?, int>? reactionCounts;
 
   /// A map describing the count of score of every reaction
   @JsonKey(includeIfNull: false, toJson: Serialization.readOnly)
-  final Map<String, int> reactionScores;
+  final Map<String?, int>? reactionScores;
 
   /// The latest reactions to the message created by any user.
   @JsonKey(includeIfNull: false, toJson: Serialization.readOnly)
-  final List<Reaction> latestReactions;
+  final List<Reaction>? latestReactions;
 
   /// The reactions added to the message by the current user.
   @JsonKey(includeIfNull: false, toJson: Serialization.readOnly)
-  final List<Reaction> ownReactions;
+  final List<Reaction>? ownReactions;
 
   /// The ID of the parent message, if the message is a thread reply.
-  final String parentId;
+  final String? parentId;
 
   /// A quoted reply message
   @JsonKey(toJson: Serialization.readOnly)
-  final Message quotedMessage;
+  final Message? quotedMessage;
 
   /// The ID of the quoted message, if the message is a quoted reply.
-  final String quotedMessageId;
+  final String? quotedMessageId;
 
   /// Reserved field indicating the number of replies for this message.
   @JsonKey(includeIfNull: false, toJson: Serialization.readOnly)
-  final int replyCount;
+  final int? replyCount;
 
   /// Reserved field indicating the thread participants for this message.
   @JsonKey(includeIfNull: false, toJson: Serialization.readOnly)
-  final List<User> threadParticipants;
+  final List<User>? threadParticipants;
 
   /// Check if this message needs to show in the channel.
-  final bool showInChannel;
+  final bool? showInChannel;
 
   /// If true the message is silent
-  final bool silent;
+  final bool? silent;
 
   /// If true the message will not send a push notification
-  final bool skipPush;
+  final bool? skipPush;
 
   /// If true the message is shadowed
   @JsonKey(includeIfNull: false, toJson: Serialization.readOnly)
-  final bool shadowed;
+  final bool? shadowed;
 
   /// A used command name.
   @JsonKey(includeIfNull: false, toJson: Serialization.readOnly)
-  final String command;
+  final String? command;
 
   /// Reserved field indicating when the message was created.
   @JsonKey(includeIfNull: false, toJson: Serialization.readOnly)
-  final DateTime createdAt;
+  final DateTime? createdAt;
 
   /// Reserved field indicating when the message was updated last time.
   @JsonKey(includeIfNull: false, toJson: Serialization.readOnly)
-  final DateTime updatedAt;
+  final DateTime? updatedAt;
 
   /// User who sent the message
   @JsonKey(includeIfNull: false, toJson: Serialization.readOnly)
-  final User user;
+  final User? user;
 
   /// If true the message is pinned
-  final bool pinned;
+  final bool? pinned;
 
   /// Reserved field indicating when the message was pinned
   @JsonKey(toJson: Serialization.readOnly)
-  final DateTime pinnedAt;
+  final DateTime? pinnedAt;
 
   /// Reserved field indicating when the message will expire
   ///
   /// if `null` message has no expiry
-  final DateTime pinExpires;
+  final DateTime? pinExpires;
 
   /// Reserved field indicating who pinned the message
   @JsonKey(toJson: Serialization.readOnly)
-  final User pinnedBy;
+  final User? pinnedBy;
 
   /// Message custom extraData
   @JsonKey(includeIfNull: false)
-  final Map<String, dynamic> extraData;
+  final Map<String, dynamic>? extraData;
 
   /// True if the message is a system info
   bool get isSystem => type == 'system';
@@ -198,7 +198,7 @@ class Message {
 
   /// Reserved field indicating when the message was deleted.
   @JsonKey(includeIfNull: false, toJson: Serialization.readOnly)
-  final DateTime deletedAt;
+  final DateTime? deletedAt;
 
   /// Known top level fields.
   /// Useful for [Serialization] methods.
@@ -239,35 +239,35 @@ class Message {
 
   /// Creates a copy of [Message] with specified attributes overridden.
   Message copyWith({
-    String id,
-    String text,
-    String type,
-    List<Attachment> attachments,
-    List<User> mentionedUsers,
-    Map<String, int> reactionCounts,
-    Map<String, int> reactionScores,
-    List<Reaction> latestReactions,
-    List<Reaction> ownReactions,
-    String parentId,
-    Message quotedMessage,
-    String quotedMessageId,
-    int replyCount,
-    List<User> threadParticipants,
-    bool showInChannel,
-    bool shadowed,
-    bool silent,
-    String command,
-    DateTime createdAt,
-    DateTime updatedAt,
-    DateTime deletedAt,
-    User user,
-    bool pinned,
-    DateTime pinnedAt,
-    Object pinExpires = _pinExpires,
-    User pinnedBy,
-    Map<String, dynamic> extraData,
-    MessageSendingStatus status,
-    bool skipPush,
+    String? id,
+    String? text,
+    String? type,
+    List<Attachment>? attachments,
+    List<User>? mentionedUsers,
+    Map<String?, int>? reactionCounts,
+    Map<String?, int>? reactionScores,
+    List<Reaction>? latestReactions,
+    List<Reaction>? ownReactions,
+    String? parentId,
+    Message? quotedMessage,
+    String? quotedMessageId,
+    int? replyCount,
+    List<User>? threadParticipants,
+    bool? showInChannel,
+    bool? shadowed,
+    bool? silent,
+    String? command,
+    DateTime? createdAt,
+    DateTime? updatedAt,
+    DateTime? deletedAt,
+    User? user,
+    bool? pinned,
+    DateTime? pinnedAt,
+    Object? pinExpires = _pinExpires,
+    User? pinnedBy,
+    Map<String, dynamic>? extraData,
+    MessageSendingStatus? status,
+    bool? skipPush,
   }) {
     assert(() {
       if (pinExpires is! DateTime &&
@@ -305,7 +305,8 @@ class Message {
       pinned: pinned ?? this.pinned,
       pinnedAt: pinnedAt ?? this.pinnedAt,
       pinnedBy: pinnedBy ?? this.pinnedBy,
-      pinExpires: pinExpires == _pinExpires ? this.pinExpires : pinExpires,
+      pinExpires:
+          pinExpires == _pinExpires ? this.pinExpires : pinExpires as DateTime?,
       skipPush: skipPush ?? this.skipPush,
     );
   }
@@ -355,13 +356,13 @@ class TranslatedMessage extends Message {
   TranslatedMessage(this.i18n);
 
   /// Create a new instance from a json
-  factory TranslatedMessage.fromJson(Map<String, dynamic> json) =>
+  factory TranslatedMessage.fromJson(Map<String, dynamic>? json) =>
       _$TranslatedMessageFromJson(
-        Serialization.moveToExtraDataFromRoot(json, topLevelFields),
+        Serialization.moveToExtraDataFromRoot(json, topLevelFields)!,
       );
 
   /// A Map of
-  final Map<String, String> i18n;
+  final Map<String, String>? i18n;
 
   /// Known top level fields.
   /// Useful for [Serialization] methods.

packages/stream_chat/lib/src/models/mute.dart

@@ -16,19 +16,19 @@ class Mute {
 
   /// The user that performed the muting action
   @JsonKey(includeIfNull: false, toJson: Serialization.readOnly)
-  final User user;
+  final User? user;
 
   /// The target user
   @JsonKey(includeIfNull: false, toJson: Serialization.readOnly)
-  final ChannelModel channel;
+  final ChannelModel? channel;
 
   /// The date in which the use was muted
   @JsonKey(includeIfNull: false, toJson: Serialization.readOnly)
-  final DateTime createdAt;
+  final DateTime? createdAt;
 
   /// The date of the last update
   @JsonKey(includeIfNull: false, toJson: Serialization.readOnly)
-  final DateTime updatedAt;
+  final DateTime? updatedAt;
 
   /// Serialize to json
   Map<String, dynamic> toJson() => _$MuteToJson(this);

packages/stream_chat/lib/src/models/own_user.dart

@@ -17,14 +17,14 @@ class OwnUser extends User {
     this.totalUnreadCount,
     this.unreadChannels,
     this.channelMutes,
-    String id,
-    String role,
-    DateTime createdAt,
-    DateTime updatedAt,
-    DateTime lastActive,
-    bool online,
-    Map<String, dynamic> extraData,
-    bool banned,
+    String? id,
+    String? role,
+    DateTime? createdAt,
+    DateTime? updatedAt,
+    DateTime? lastActive,
+    bool? online,
+    Map<String, dynamic>? extraData,
+    bool? banned,
   }) : super(
           id: id,
           role: role,
@@ -37,28 +37,28 @@ class OwnUser extends User {
         );
 
   /// Create a new instance from a json
-  factory OwnUser.fromJson(Map<String, dynamic> json) => _$OwnUserFromJson(
-      Serialization.moveToExtraDataFromRoot(json, topLevelFields));
+  factory OwnUser.fromJson(Map<String, dynamic>? json) => _$OwnUserFromJson(
+      Serialization.moveToExtraDataFromRoot(json, topLevelFields)!);
 
   /// List of user devices
   @JsonKey(includeIfNull: false, toJson: Serialization.readOnly)
-  final List<Device> devices;
+  final List<Device>? devices;
 
   /// List of users muted by the user
   @JsonKey(includeIfNull: false, toJson: Serialization.readOnly)
-  final List<Mute> mutes;
+  final List<Mute>? mutes;
 
   /// List of users muted by the user
   @JsonKey(includeIfNull: false, toJson: Serialization.readOnly)
-  final List<Mute> channelMutes;
+  final List<Mute>? channelMutes;
 
   /// Total unread messages by the user
   @JsonKey(includeIfNull: false, toJson: Serialization.readOnly)
-  final int totalUnreadCount;
+  final int? totalUnreadCount;
 
   /// Total unread channels by the user
   @JsonKey(includeIfNull: false, toJson: Serialization.readOnly)
-  final int unreadChannels;
+  final int? unreadChannels;
 
   /// Known top level fields.
   /// Useful for [Serialization] methods.

packages/stream_chat/lib/src/models/reaction.dart

@@ -13,39 +13,39 @@ class Reaction {
     this.createdAt,
     this.type,
     this.user,
-    String userId,
+    String? userId,
     this.score,
     this.extraData,
   }) : userId = userId ?? user?.id;
 
   /// Create a new instance from a json
-  factory Reaction.fromJson(Map<String, dynamic> json) => _$ReactionFromJson(
-      Serialization.moveToExtraDataFromRoot(json, topLevelFields));
+  factory Reaction.fromJson(Map<String, dynamic>? json) => _$ReactionFromJson(
+      Serialization.moveToExtraDataFromRoot(json, topLevelFields)!);
 
   /// The messageId to which the reaction belongs
-  final String messageId;
+  final String? messageId;
 
   /// The type of the reaction
-  final String type;
+  final String? type;
 
   /// The date of the reaction
   @JsonKey(includeIfNull: false, toJson: Serialization.readOnly)
-  final DateTime createdAt;
+  final DateTime? createdAt;
 
   /// The user that sent the reaction
   @JsonKey(includeIfNull: false, toJson: Serialization.readOnly)
-  final User user;
+  final User? user;
 
   /// The score of the reaction (ie. number of reactions sent)
-  final int score;
+  final int? score;
 
   /// The userId that sent the reaction
   @JsonKey(includeIfNull: false, toJson: Serialization.readOnly)
-  final String userId;
+  final String? userId;
 
   /// Reaction custom extraData
   @JsonKey(includeIfNull: false)
-  final Map<String, dynamic> extraData;
+  final Map<String, dynamic>? extraData;
 
   /// Map of custom user extraData
   static const topLevelFields = [
@@ -63,13 +63,13 @@ class Reaction {
 
   /// Creates a copy of [Reaction] with specified attributes overridden.
   Reaction copyWith({
-    String messageId,
-    DateTime createdAt,
-    String type,
-    User user,
-    String userId,
-    int score,
-    Map<String, dynamic> extraData,
+    String? messageId,
+    DateTime? createdAt,
+    String? type,
+    User? user,
+    String? userId,
+    int? score,
+    Map<String, dynamic>? extraData,
   }) =>
       Reaction(
         messageId: messageId ?? this.messageId,

packages/stream_chat/lib/src/models/read.dart

@@ -17,22 +17,22 @@ class Read {
   factory Read.fromJson(Map<String, dynamic> json) => _$ReadFromJson(json);
 
   /// Date of the read event
-  final DateTime lastRead;
+  final DateTime? lastRead;
 
   /// User who sent the event
-  final User user;
+  final User? user;
 
   /// Number of unread messages
-  final int unreadMessages;
+  final int? unreadMessages;
 
   /// Serialize to json
   Map<String, dynamic> toJson() => _$ReadToJson(this);
 
   /// Creates a copy of [Read] with specified attributes overridden.
   Read copyWith({
-    DateTime lastRead,
-    User user,
-    int unreadMessages,
+    DateTime? lastRead,
+    User? user,
+    int? unreadMessages,
   }) =>
       Read(
         lastRead: lastRead ?? this.lastRead,

packages/stream_chat/lib/src/models/serialization.dart

@@ -10,12 +10,12 @@ class Serialization {
   static const Function readOnly = readonly;
 
   /// List of users to list of userIds
-  static List<String> userIds(List<User> users) =>
+  static List<String?>? userIds(List<User>? users) =>
       users?.map((u) => u.id)?.toList();
 
   /// Takes unknown json keys and puts them in the `extra_data` key
-  static Map<String, dynamic> moveToExtraDataFromRoot(
-    Map<String, dynamic> json,
+  static Map<String, dynamic>? moveToExtraDataFromRoot(
+    Map<String, dynamic>? json,
     List<String> topLevelFields,
   ) {
     if (json == null) return null;

packages/stream_chat/lib/src/models/user.dart

@@ -20,8 +20,8 @@ class User {
   });
 
   /// Create a new instance from a json
-  factory User.fromJson(Map<String, dynamic> json) => _$UserFromJson(
-      Serialization.moveToExtraDataFromRoot(json, topLevelFields));
+  factory User.fromJson(Map<String, dynamic>? json) => _$UserFromJson(
+      Serialization.moveToExtraDataFromRoot(json, topLevelFields)!);
 
   /// Use this named constructor to create a new user instance
   User.init(
@@ -49,47 +49,47 @@ class User {
   ];
 
   /// User id
-  final String id;
+  final String? id;
 
   /// User role
   @JsonKey(includeIfNull: false, toJson: Serialization.readOnly)
-  final String role;
+  final String? role;
 
   /// User role
   @JsonKey(includeIfNull: false, toJson: Serialization.readOnly)
-  final List<String> teams;
+  final List<String>? teams;
 
   /// Date of user creation
   @JsonKey(includeIfNull: false, toJson: Serialization.readOnly)
-  final DateTime createdAt;
+  final DateTime? createdAt;
 
   /// Date of last user update
   @JsonKey(includeIfNull: false, toJson: Serialization.readOnly)
-  final DateTime updatedAt;
+  final DateTime? updatedAt;
 
   /// Date of last user connection
   @JsonKey(includeIfNull: false, toJson: Serialization.readOnly)
-  final DateTime lastActive;
+  final DateTime? lastActive;
 
   /// True if user is online
   @JsonKey(includeIfNull: false, toJson: Serialization.readOnly)
-  final bool online;
+  final bool? online;
 
   /// True if user is banned from the chat
   @JsonKey(includeIfNull: false, toJson: Serialization.readOnly)
-  final bool banned;
+  final bool? banned;
 
   /// Map of custom user extraData
   @JsonKey(includeIfNull: false)
-  final Map<String, dynamic> extraData;
+  final Map<String, dynamic>? extraData;
 
   @override
   int get hashCode => id.hashCode;
 
   /// Shortcut for user name
-  String get name =>
-      (extraData?.containsKey('name') == true && extraData['name'] != '')
-          ? extraData['name']
+  String? get name =>
+      (extraData?.containsKey('name') == true && extraData!['name'] != '')
+          ? extraData!['name']
           : id;
 
   @override
@@ -103,15 +103,15 @@ class User {
 
   /// Creates a copy of [User] with specified attributes overridden.
   User copyWith({
-    String id,
-    String role,
-    DateTime createdAt,
-    DateTime updatedAt,
-    DateTime lastActive,
-    bool online,
-    Map<String, dynamic> extraData,
-    bool banned,
-    List<String> teams,
+    String? id,
+    String? role,
+    DateTime? createdAt,
+    DateTime? updatedAt,
+    DateTime? lastActive,
+    bool? online,
+    Map<String, dynamic>? extraData,
+    bool? banned,
+    List<String>? teams,
   }) =>
       User(
         id: id ?? this.id,