add events

lb_common.lua

@@ -107,3 +107,20 @@ rawset(_G, "lb_mapnum_from_extended", function(map)
 
 	return mapnum
 end)
+
+local eventHandler = {}
+
+rawset(_G, "lb_hook", function(event, callback)
+	local handle = eventHandler[event] or {}
+	table.insert(handle, callback)
+	eventHandler[event] = handle
+end)
+
+rawset(_G, "lb_fire_event", function(event, ...)
+	local handle = eventHandler[event]
+	if not handle then return end
+
+	for _, callback in ipairs(handle) do
+		pcall(callback, ...)
+	end
+end)