Proximity-based chat

This example shows how to implement an exclusive chat for users who are near each other in the game world. It extends the callback with a function using TextSource to identify the locations of a user who might be a potential message receiver. If this function returns false, it means that the user locates further than the preset valid range from the message sender, so the system doesn't deliver the message to that user.

Add the following to a Script in ServerScriptService:

Server
local TextChatService = game:GetService("TextChatService")
local Players = game:GetService("Players")

-- Get the chat channel for proximity-based chat
-- You can replace this general channel with a dedicated channel
local generalChannel: TextChannel = TextChatService:WaitForChild("TextChannels").RBXGeneral

-- Function to get the position of a user's character
local function getPositionFromUserId(userId: number)
	-- Get the player associated with the given user ID
	local targetPlayer = Players:GetPlayerByUserId(userId)

	-- If the player exists, get their character's position
	if targetPlayer then
		local targetCharacter = targetPlayer.Character
		if targetCharacter then
			return targetCharacter:GetPivot().Position
		end
	end

	-- Return a default position if the player or character cannot be found
	return Vector3.zero
end

-- Set the callback for the general channel to control message delivery
generalChannel.ShouldDeliverCallback = function(textChatMessage: TextChatMessage, targetTextSource: TextSource)
	-- Get the positions of the message sender and target
	local sourcePos = getPositionFromUserId(textChatMessage.TextSource.UserId)
	local targetPos = getPositionFromUserId(targetTextSource.UserId)

	-- Deliver message if distance between sender and target is less than 50 units
	return (targetPos - sourcePos).Magnitude < 50
end