You have a raspberry pi connected to all the sensors and a code running to trigger if the sensors are triggered. Each sensor and keypad would run to a different input on the pi. They should al be able to be powered with a single cell lipo. Is that what you are asking?
Answer:
add the following code to your bar class
Explanation:
public Bar(Commands n) { }
Answer:
immmm ....
I know the answer but I won't tell..lolllll
The answer is C Excel. Excel allows you to make spreadsheets.
Hope this helps :-)