Create a message thread

When a user replies to a message in a channel, it creates a message thread, which refers to a collection of messages consisting of a parent message and its replies. Message threading lets users ask questions, give feedback, or add context to a specific message without disrupting the flow of conversation. It can have the following elements.

• A message can have a thread of replies.

• A message that has a thread of replies is a parent message.

• A parent message and its threaded replies are collectively called a message thread.

• Every message within a thread, whether it's parent or reply, is a threaded message.

• A message that doesn't have any replies is an unthreaded message.

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Message threading has the following limitations.

• Only 1-depth threads are supported, meaning you can only add reply messages to non-reply messages. You can't add a reply to a reply message.

• Message threading is limited to text and file messages. You can't send admin messages as replies or add replies to admin messages.

You can reply to a specific message in a channel through the sendUserMessage() or sendFileMessage() method. To do so, you should create a UserMessageCreateParams or a FileMessageCreateParams object and then specify the parentMessageId property of the object. Sending reply messages works the same way as sending regular messages to a channel except replies have an additional parentMessageId property.

When replying to a message through the sendUserMessage() method, you should specify and pass a UserMessageCreateParams object to the method as a parameter. The UserMessageCreateParams class is derived from the BaseMessageCreateParams class and can access all the methods and properties of BaseMessageCreateParams.

try {
  final params = UserMessageCreateParams(message: MESSAGE)
    ..parentMessageId = PARENT_MESSAGE_ID;

  final message = channel.sendUserMessage(params, handler: (message, e) {
    if (e != null) {
      // Handle error.
    } else {
      // A reply to a specific message in the form of a text message is successfully sent.  
    }
  });
} catch (e) {
  // Handle error.
}

This table only contains properties shown in the code above. To see the comprehensive list of all available methods and properties, see UserMessageCreateParams.

When replying with a file message through the sendFileMessage() method, you should specify and pass a FileMessageCreateParams object to the method as a parameter. The FileMessageCreateParams class is derived from the BaseMessageCreateParams class and can access all the methods and properties of BaseMessageCreateParams.

try {
  final params = FileMessageCreateParams.withFile(FILE)
    ..parentMessageId = PARENT_MESSAGE_ID;

  final message = channel.sendFileMessage(params, handler: (message, e) {
    if (e != null) {
      // Handle error.
    } else {
      // A reply to a specific message in the form of a file message is successfully sent.
    }
  });
} catch (e) {
  // Handle error.
}

This table only contains properties shown in the code above. To see the comprehensive list of all available methods and properties, see FileMessageCreateParams.