Mostly need insipiration on this topic:- Will be building one with:-
1) Google maps retaurant delivery range system
2) Food menu with infinite number of categoies, sub-categories, toppings, etc- * making the restaurant owner enter their menu will be a bit tricky. Some UI elements to seamlessly add products would be great.
3) Something like what pizza hut does now but a more generalized solution pertaining to all kinds of food stuff.
any helpful links, artilces, open-source solutions would be most appreciated