nodmgarea={{1,2,2,3},{4,4,4,4},{2,6,4,8},{0,13,1,15},{4,11,9,16},{9,1,15,2},{9,4,11,6},{8,8,11,8}}

addhook("hit","a7x_is_cool")
function a7x_is_cool(id,s)
	local tx,ty = player(id,"tilex"),player(id,"tiley")
	for k,v in pairs(nodmgarea) do
		local m,n = v[2] - v[4], v[1] - v[3]
		local disx,disy = v[1] - tx, v[2] - ty
		if disx <= 0 and disy <= 0 then
			if disx >= n and disy >= m then
				msg2(s,"You can't attack other player who is in the safe zone!")
				return 1
			end
		end
	end
	return 0
end

PropertyRegistry = {}

function PropertyExists(name)
	return PropertyRegistry[name] ~= nil
end

function PropertyOwned(name)
	if PropertyExists(name) then
		return PropertyRegistry[name].owner > 0
	end
end

function BuyProperty(playerid,name)
	if PropertyExists(name) then
		if rp_money[playerid] >= PropertyRegistry[name].price then
			if not PropertyOwned(name) then
				if player(playerid,"usgn") > 0 then
					rp_money[playerid] = rp_money[playerid] - PropertyRegistry[name].price
					PropertyRegistry[name].owner = player(playerid, "usgn")
				else
					-- PLAYER IS NOT REGISTERED
				end
			else
				-- PROPERTY ALREADY BOUGHT
			end
		else
			-- NOT ENOUGH MONEY
		end
	else
		-- PROPERTY DOESN'T EXIST
	end
end

function PropertyAtPos(x,y)
	for name, prop in pairs(PropertyRegistry) do
		if x >= prop.areaStartX and y >= prop.areaStartY and x <= prop.areaEndX and y <= prop.areaEndY then
			return name
		end
	end
end

addhook("trigger","onTrigger")
function onTrigger(name)
	if LockedEntity[name] then
		LockedEntity[name] = false
		return 1
	end
end

LockedEntity = {}
addhook("use","onUse")
function onUse(id,event,data,x,y)
	if event == 100 then
		local property_name = PropertyAtPos(x, y)
		if PropertyExists(property_name) then
			if PropertyRegistry[property_name].owner == player(id, "usgn") then
				-- Triggered by owner, proceed normally
			else
				-- Not triggered by owner, lock the trigger name
				LockedEntity[entity(x, y, "name")] = true
				
				-- Do buy action
				menu(id, "Buy property ["..property_name.."],Yes|-$"..PropertyRegistry[property_name].price..",No")
			end
		end
	end
end

addhook("menu","onMenu")
function onMenu(id,title,selection)
	if string.sub(title, 1, 12) == "Buy Property" then
		local property_name = string.sub(title, 15, string.len(title)-1)
		if string.len(property_name) > 0 and selection == 1 then
			BuyProperty(id, property_name)
		end
	end
end

function MakeProperty(name)
	return function (area)
		return function (triggers)
			return function (price)
				PropertyRegistry[name] = {
					areaStartX = area[1],
					areaStartY = area[2],
					areaEndX = area[3],
					areaEndY = area[4],
					triggers = triggers,
					price = price[1],
					
					-- USGN owner
					owner = 0,
				}
			end
		end
	end
end

-- EXAMPLE
MakeProperty"House1"{15,20,30,35}{"door1","door2","door3"}{1500}