roomstates = {}

function OnExitRoom(room, coordinate)
    roomstates[coordinate] = {
        Count = room.objects.count
        Objects = {}
    }

    local myroom = roomstates[coordinate]

    for i = 1, myroom.Count do
        myroom.objects[i].Type = room.objects[i].Type
        myroom.objects[i].Position = room.objects[i].Position
        myroom.objects[i].HP = room.objects[i].HP
    end
end

function OnEnterRoom(room, coordinate)
    if roomstates[coordinate] == nil then
        return
    end

    room.objects:Clear()

    local myroom = roomstates[coordinate]

    for i = 1, myroom.Count do
        local Object = nil

        if myroom.objects[i] == "box" then
            Object = box()
        elseif myroom.objects[i] == "enemy" then
            Object = new enemy()
        end

        if Object ~= nil then
            Object.Position = myroom.objects[i].Position
            Object.HP = myroom.objects[i].HP

            room.objects:Add(Object)
        end
    end
end