readChat method

Future<void> readChat(
  1. ChatId chatId,
  2. ChatItemId untilId
)

Marks the specified Chat as read for the authenticated MyUser until the specified ChatItem inclusively.

There is no notion of a single ChatItem being read or not separately in a Chat. Only a whole Chat as a sequence of ChatItems can be read until some its position (concrete ChatItem). So, any ChatItem may be considered as read or not by comparing its ChatItem.at with the LastChatRead.at of the authenticated MyUser: if it's below (less or equal) then the ChatItem is read, otherwise it's unread.

This method should be called whenever the authenticated MyUser reads new ChatItems appeared in the Chat's UI and directly influences the Chat.unreadCount value.

Implementation

Future<void> readChat(ChatId chatId, ChatItemId untilId) async {
  Log.debug('readChat($chatId, $untilId)', '$runtimeType');
  await _chatRepository.readChat(chatId, untilId);
}