No compression

About a week ago I was driving my car. When I came to a stop the car started to shake and it was getting a very rough idle. I immediately shut the car off. When I attempted to restart the car it would not start. The car cranks normally but that is it. I had the car towed back to my house and performed a scan. Several codes came up. It said that I was getting a misfire on cylinders number one and number four. It also said that I had a possible bad camshaft and crankshaft sensor. I replaced them both as well as replacing all spark plugs and coils. Still nothing. I spoke to a friend and he told me to do a compression test. I did and sure enough nothing in all four cylinders. I realize there can possibly be a broken timing chain or camshaft. My main concern is that this did not blow the engine. If the cylinders are bent then I have some major issues to deal with. How can I tell if there was any additional damage done after I confirm that the timing is bad? Do I have to pull apart the engine to confirm this or is there an easier way?