Adds a TextSource to the TextChannel given userId of the user (with Player.UserId). Can only be used in a Script.

If a TextSource representing the user does not exist, this adds a TextSource.

If a TextSource representing the user does exist, this returns the TextSource.

If the user has chat off or isn't in the server, this returns a tuple nil, false.

The TextChannel will only deliver messages to users that can send direct messages to the DirectChatRequester. This property can only be set using SetDirectChatRequester().

Displays a system message to user. Can only be used in a LocalScript, or in a Script with RunContext of RunContext.Client. Messages are only visible to that user and aren't automatically filtered or localized.

Like TextChatService.MessageReceived, fires when TextChannel:DisplaySystemMessage() is invoked on the client, or when the client receives a valid TextChannel:SendAsync() response from the server. This event is only fired on the client.

If the server's TextChannel.ShouldDeliverCallback property is bound and returns false, the client will not fire TextChannel.MessageReceived.

Use the TextChatMessage parameter to get the TextSource and the text of the message (with TextChatMessage.Text).

The TextChatMessage parameter is the final result of any functions bound to TextChatService.OnIncomingMessage or TextChannel.OnIncomingMessage.

Called when TextChannel is receiving an incoming message. Can only be implemented on the client.

Use this to decorate TextChatMessages. If this callback returns a TextChatMessageProperties, those properties are merged with the TextChatMessage parameter to create a new TextChatMessage.

When bound to the client sending a message, this callback is run twice; first when the message is initially sent and received locally, and again when the client receives the result of the filtered message from the server.

TextChannel.OnIncomingMessage callbacks always run after the TextChatService.OnIncomingMessage callback.

This should be defined only once per TextChannel in the source code. Multiple bindings to the same channel will override one another in a nondeterministic manner.

When TextChatService:CreateDefaultTextChannels() is true, those default TextChannels have their TextChannel.OnIncomingMessage callbacks assigned internally in order to exhibit special default behavior.

Sends a TextChatMessage to the server. Can only be used in a LocalScript, or in a Script with RunContext of RunContext.Client.

The metadata argument has a limit of 200 characters. If this is called with a metadata argument that has more than 200 characters, the message will not be sent to other users. Instead, the sender will receive a TextChatMessage with the TextChatMessage.Metadata and TextChatMessage.Text properties set to empty strings.

Sets the DirectChatRequester for the TextChannel. This method is only available for use in server scripts.

Use this API if you are working with TextChatService and have a custom implementation of direct chat outside of the default text channels.

When called on a TextChannel that is parented to TextChatService and has no existing TextSources, SetDirectChatRequester adds the requested users as a TextSource and set the DirectChatRequester property for the channel.

When DirectChatRequester is set, only messages between users that can direct chat with the DirectChatRequester are delivered.

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local function createWhisperChannel(fromPlayer, toPlayer)
  local whisperChannel = Instance.new("TextChannel")
  whisperChannel:SetDirectChatRequester(fromPlayer)
  whisperChannel:AddUserAsync(toPlayer.UserId)
  -- The TextChannel instance now has two TextSource instances.
  return whisperChannel
end

Called for each client when TextChannel is receiving an incoming message to determine whether or not it should be delivered to that client. Can only be defined on the server.

Once defined, this callback needs to return a truthy value such as true, 1, or "hello" to deliver the message to said client. If the callback returns anything else (including nil), the message won't be delivered to that client, although the sender will see the message regardless.

The sender can be referenced by TextChatMessage.TextSource, while the receiver is the textSource argument. Note that the sender and receiver can be the same, as the callback iterates through all possible receivers. In Roblox Studio, you will be the only sender and recipient of a message while in solo Play mode.