A simple Point-of-sale (POS) API
Terminal terminal = new Terminal();
terminal.addItem("A", 4.57); // $4.57 for single item
terminal.setDeal("A", 4, 15.00); // $15.00 for every 4
terminal.addItem("B", 10.00); // $10.00 for single item, no sale/bulk price
// Ring up a customer with AAAABBB
terminal.clearCart(); // Just to be safe
terminal.scan("A", 4);
termianl.scan("B", 3);
terminal.printTotal(); // Total: $45.00
// Whoops! Customer only wanted 2 B's
terminal.voidItem("B");
terminal.printTotal(); // Total: $35.00
Item a = new Item("A", 4.57);
a.getName(); // "A"
a.getBasePrice(); // 4.57
a.getTotalCost(2); // 9.14
a.getTotalCost(10); // 45.70
a.getVolumeQuantity(); // 2147483647 (default to make modulus arithmetic work)
a.getVolumeCost(); // 0
a.setVolumePrice(4, 15.00);
a.getTotalCost(10); // 39.14
- allow different kinds of deals
- bulk price w/o modulus (buy 4+, get each for $3)
- buy one, get one free/half off or similar
- coupon scan (% off an item, $ off an item) --> Coupon class
- allow payments and receipts (cash, credit, debit, gift cards)
- refactor for MVC
- ("M") Item should only have
nameandbasePrice - ("V") Terminal should only have standard methods
scanItemvoidItemgetItemPricescanCouponapplyDiscountprintTotalclearCartupdateTotal
- ("C") Maintains items, coupons, and several deal types associated with items.
addItemsetDealclearItems
- ("M") Item should only have