ChannelUserMessageSendRequest constructor Null safety

Implementation

ChannelUserMessageSendRequest({
  required this.channelType,
  required this.channelUrl,
  required this.params,
}) : super() {
  //
  payload.addAll({
    'channel_url': channelUrl,
    'message': params.message,
    'data': params.data,
    'custom_type': params.customType
  });

  if (params.targetLanguages.isNotEmpty) {
    payload['target_langs'] = params.targetLanguages;
    payload['translations'] = {for (var e in params.targetLanguages) e: ''};
  }

  if (params.pushOption == PushNotificationDeliveryOption.suppress) {
    payload['push_option'] = params.pushOption.asString();
  }

  payload['mention_type'] = params.mentionType?.asString();
  if (params.mentionType == MentionType.users) {
    payload['mentioned_user_ids'] = params.mentionedUserIds;
  }

  payload['created_at'] = DateTime.now().millisecondsSinceEpoch;
  payload['metaarray'] = params.metaArrays?.map((e) => e.toJson()).toList();

  if (params.parentMessageId != null) {
    payload['parent_message_id'] = params.parentMessageId;
    payload['root_message_id'] = params.parentMessageId;
  }

  payload.removeWhere((key, value) => value == null);
}