Delivery & Read Receipts

Mark Messages as Delivered

In other words, as a recipient, how do I inform the sender that I’ve received a message?

You can mark the messages for a particular conversation as read using the markAsDelivered() method. This method takes the below parameters as input:

Parameter	Information
id	The ID of the message above which all the messages for a particular conversation are to be marked as read.
receiverUid	In case of one to one conversation message’s sender UID will be the receipt’s receiver Id.
receiverType	Type of the receiver. Could be either of the two values( user or group).

Messages for both User conversation and Groups can be marked as read using this method.

Ideally, you would like to mark all the messages as delivered for any conversation when the user opens the chat window for that conversation. This includes two scenarios:

1. When the list of messages for the conversation is fetched: In this case you need to obtain the last message in the list of messages and pass the message to the markAsDelivered() method.
2. When the user is on the chat window and a real-time message is received: In this case you need to obtain the message and pass it to the markAsDelivered() method.

This method will mark all the messages before the messageId specified, for the conversation with receiverId and receiverType(user/group) as read.

In case you would like to be notified of an error if the receipts fail to go through you can use markAsDelivered() method with the callbacks as shown below:

Dart

CometChat.markAsDelivered(message, onSuccess: (String unused) {
  debugPrint("markAsDelivered : $unused ");
}, onError: (CometChatException e) {
  debugPrint("markAsDelivered unsuccessful : ${e.message} ");
});

Mark Messages as Read

In other words, as a recipient, how do I inform the sender I’ve read a message?

You can mark the messages for a particular conversation as read using the markAsRead() method. This method takes the below parameters as input:

Messages for both user and group conversations can be marked as read using this method.

Ideally, you should mark all the messages as read for any conversation when the user opens the chat window for that conversation. This includes two scenarios:

1. When the list of messages for the conversation is fetched: In this case you need to obtain the last message in the list of messages and pass the message to the markAsRead() method.
2. When the user is on the chat window and a real-time message is received: In this case you need to obtain the message and pass it to the markAsRead() method

This method will mark all the messages before the message specified, for the conversation with receiverId and receiverType (user/group) as read.

Dart

CometChat.markAsRead(message)

In case you would like to be notified of an error if the receipts fail to go through you can use the markAsRead() method with the callbacks as shown below:

Dart

CometChat.markAsRead(message, onSuccess: (String unused) {
      debugPrint("markAsRead : $unused ");
      reinitiateList();
    }, onError: (CometChatException e) {
      debugPrint("markAsRead unsuccessfull : ${e.message} ");
    });

Receive Delivery & Read Receipts

In other words, as a recipient, how do I know when a message I sent has been delivered or read by someone?

Real-time Receipts

Real-time events for messages of a conversation being read or delivered can be obtained in the onMessagesRead() and the onMessagesDelivered() methods of the MessageListener class.

Dart

class Class_Name  with MessageListener {

  //CometChat.addMessageListener("listenerId", this);
@override
  void onMessagesDelivered(MessageReceipt messageReceipt) {
    // TODO: implement onMessagesDelivered
    
  }
  
  @override
  void onMessagesRead(MessageReceipt messageReceipt) {
   // TODO: implement onMessagesRead
  }


}

You will receive events in the form of MessageReceipt objects. The message receipt contains the following parameters:

Parameter	Information
messageId	The ID of the message prior to which all the messages for that particular conversation have been marked as read.
sender	User object containing the details of the user who has marked the message as read.
receiverId	Id of the receiver whose conversation has been marked as read.
receiverType	Type of the receiver (user/group)
receiptType	Type of the receipt (read/delivered)
deliveredAt	The timestamp of the time when the message was delivered. This will only be present if the receiptType is delivered.
readAt	The timestamp of the time when the message was read. This will only be present when the receiptType is read.

Missed Receipts

You will receive message receipts when you load offline messages. For groups, we do not include the list the users that have received it. You need to call the getMessageReceipts() method for it.

While fetching messages in bulk, if the message is a part of a one-on-one conversation, the message object will have two fields viz. deliveredAt and readAt which hold the timestamp for the time the message was delivered and read respectively. Using these two variables, the delivery and read status for a one-on-one conversation message can be obtained.

However, for a group conversation message, the deliveredAt and readAt fields are set once a message is delivered to or read by all members of the group.

Receipt History for a Single Message

In order to fetch the message receipts, you can use the getMessageReceipts() method.

Dart

private int messageId = 10101;

CometChat.getMessageReceipts(messageId, new CometChat.CallbackListener<List<MessageReceipt>>() {
  @Override
    public void onSuccess(List<MessageReceipt> messageReceipts) {
    	// Handle message receipts
  }

  @Override
    public void onError(CometChatException e) {
    // Handle error
  }
});

You will receive a list of MessageReceipt objects in the onSuccess() method.