add gs

RCCService2021/ExtraContent/LuaPackages/AppTempCommon/Common/Signal.lua

@@ -0,0 +1,75 @@
+--[[
+	A limited, simple implementation of a Signal.
+
+	Handlers are fired in order, and (dis)connections are properly handled when
+	executing an event.
+
+	Signal uses Immutable to avoid invalidating the 'Fire' loop iteration.
+]]
+
+local Immutable = require(script.Parent.Immutable)
+
+local Signal = {}
+
+Signal.__index = Signal
+
+function Signal.new()
+	local self = {
+		_listeners = {}
+	}
+
+	setmetatable(self, Signal)
+
+	return self
+end
+
+function Signal:connect(callback)
+	local listener = {
+		callback = callback,
+		isConnected = true,
+	}
+	self._listeners = Immutable.Append(self._listeners, listener)
+
+	local function disconnect()
+		listener.isConnected = false
+		self._listeners = Immutable.RemoveValueFromList(self._listeners, listener)
+	end
+
+	return {
+		Disconnect = function()
+			warn(string.format(
+				"Connection:Disconnect() has been deprecated, use Connection:disconnect()\n%s]",
+				debug.traceback()
+			))
+			disconnect()
+		end,
+		disconnect = disconnect,
+	}
+end
+
+function Signal:fire(...)
+	for _, listener in ipairs(self._listeners) do
+		if listener.isConnected then
+			listener.callback(...)
+		end
+	end
+end
+
+function Signal:Connect(...)
+	warn(string.format(
+		"Signal:Connect() has been deprecated, use Signal:connect()\n%s]",
+		debug.traceback()
+	))
+	return self:connect(...)
+end
+
+function Signal:Fire(...)
+	warn(string.format(
+		"Signal:Fire() has been deprecated, use Signal:fire()\n%s]",
+		debug.traceback()
+	))
+	self:fire(...)
+end
+
+
+return Signal