OOP in lua, not perfect at all but good enough lol

Class.lua

local function LightCopy(x)
	local NewT = {}
	for k,v in pairs(x) do NewT[k]=v end
	return NewT
end
function class(ClassName, Template,Extend,NotGlobal)
	if DEBUG_CLASS then
		print(
			"Creating "..
			(NotGlobal and"local "or"")..
			"class \""..ClassName..
			((Extend~=nil)and("\" extends \""..Extend:WhatIsThis().."\"")or"\"")
		)
	end
	if not Template.__meta then Template.__meta = {} end
	Template.__meta.__index = Template
	Template.__meta.__call = function(...) 
		local Args = {...} 
		table.remove(Args,1)
		Template.new(unpack(Args))
	end
	Template.new = function(...)
		local Instance = {}
		if Extend then Instance = Extend.new() end
		setmetatable(Instance,Template.__meta)
		if Template.__construct ~= nil then
			Instance:__construct(...)
		end
		return Instance
	end
	Template.WhatIsThis = function(self) return self.__inheritance[1] end
	Template.IsA = function(self,ClassName)
		for k,v in pairs(self.__inheritance) do 
			if v==ClassName then
				return true
			end
		end
		return false
	end
	if Extend~=nil then 
		setmetatable(Template,{__index=Extend})
		Template.__inheritance = LightCopy(Extend.__inheritance)
		table.insert(Template.__inheritance,1,ClassName)
	else
		Template.__inheritance = {ClassName}
	end
	if not NotGlobal then
		_G[ClassName] = Template
	end
	return Template
end