How to make colored system messages using TextChatService?

Help and Feedback Scripting Support
#1

I have to migrate from LegacyChatService to TextChatService and SetCore only works with Legacy. I got it to actually make messages now but I need to fix them not having colors please help thanks

local event = game.ReplicatedStorage:WaitForChild("ServerToClientChat")
local TextChatService = game:GetService("TextChatService")
local generalChannel: TextChannel = TextChatService:WaitForChild("TextChannels").RBXGeneral

event.OnClientEvent:Connect(function(givenText,givenBrickColor)

--[[ -- this was used for LegacyCHatService
	game.StarterGui:SetCore("ChatMakeSystemMessage", {
		Text = givenText;
		Font = Enum.Font.SourceSansBold;
		Color = givenBC;
		FontSize = Enum.FontSize.Size96;
	})
--]]
	
	generalChannel:DisplaySystemMessage(givenText)
end)

Edit: for any future viewers here is what i changed in the above script

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#2

You need to to use the metadata field generalChannel:DisplaySystemMessage(givenText, metadata), to then, within a function binded to TextChatService.OnIncomingMessage (or TextChannel.OnIncomingMessage, do something like this

local TextChatService = game:GetService("TextChatService")

TextChatService.OnIncomingMessage = function(message : TextChatMessage)
	
	local Metadata = message.Metadata
	
	if Metadata == "WhateverYouWantToAsignIt" then 
		local properties = TextChatService.ChatWindowConfiguration:DeriveNewMessageProperties()
		
		properties.TextColor3 = Color3.fromRGB(255, 121, 121)
		properties.FontFace = Font.fromEnum(Enum.Font.SourceSansBold)
		properties.TextSize = 96 -- This is like, really big?
		
		-- Set chat window message properties
		-- (Don't know what it does)
		message.ChatWindowMessageProperties = properties
		
		return properties
	end
end

Alternatively,

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#3

Thanks for your help! I adjusted my local script in case any viewers wants to just use mine

local event = game.ReplicatedStorage:WaitForChild("ServerToClientChat")
local TextChatService = game:GetService("TextChatService")
local generalChannel: TextChannel = TextChatService:WaitForChild("TextChannels").RBXGeneral

local nextMetaID = 1
local msgList = {} -- using a table makes sure that the given color doesnt just go to the first new message in chat instead of the target

TextChatService.OnIncomingMessage = function(message: TextChatMessage)
	-- check if new message in chat is a target message with color
	if message.Metadata == "" then -- normal chat messages wont have any metadata
		return
	end
	if msgList[message.Metadata] then
		local properties = TextChatService.ChatWindowConfiguration:DeriveNewMessageProperties()
		properties.TextColor3 = msgList[message.Metadata]
		properties.FontFace = Font.fromEnum(Enum.Font.SourceSansBold)
		message.ChatWindowMessageProperties = properties
		msgList[message.ChatWindowMessageProperties.Text] = nil -- clear entry to prevent memory leak
	end
end

event.OnClientEvent:Connect(function(givenText,givenBrickColor)
	local meta = nextMetaID
	meta = tostring(meta)
	nextMetaID+=1
	msgList[meta] = givenBrickColor -- save the text color in a list marked with the meta value
	generalChannel:DisplaySystemMessage(givenText,meta)
end)

Note: This is a local script, a server script fires a remote event to all clients with the message text and color data

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