MTO Ordering System HENRY, HAYDEN, AND KELLIE

Purpose  Our project modeled an ordering system similar to Sheetz  It allowed a user to order a variety of food and drinks by clicking buttons on a screen

Key Components  GUI – Hayden  State, factory, and façade patterns  Ordering – Kellie  State, singleton, and observer patterns  Food Options – Henry  Strategy, decorator, and template patterns

Development Process  First we decided on a general UML and then assigned parts to each person so that each person had three patterns  Each person came up with their own UMLs for their patterns  We coded our own parts and resolved conflicts as we put it together

Ordering  Singleton pattern for the order so you can not have more than one order at a time  Observer pattern for the receipt printer so the order can notify the printer when a receipt needs to be printed  State pattern for the order so different actions can happen when it is in different states

State Pattern for Ordering  Three States:  Idle State  In the idle state, you can just begin the order and this takes you to the ordering state  Ordering State  In the ordering state, you can add items.  You can also cancel the order which brings you back to idle and complete the order which brings you to the complete state  Complete Order State  In the complete order state you can pay for the order or cancel your order, both bring you back to the idle state This pattern is completed in the code

Inventory  State pattern to keep track of availbility of product.  OutOfStockState would prevent the order from using the product if we ran out of that product.

User Interface  Façade pattern used to simplify the ordering process for the user.  Factory pattern used to create the screens as we needed for the menu system.

Food Options  Strategy Pattern to control restrictions on the order  Template Pattern to build the food Order  Decorator Pattern to add toppings to the food order

Decorator Pattern for Food Orders  Adds Toppings/Condiments to the food order  Allows for toppings to be added to any food item, within that items restrictions, without having an individual class for each possible combination  Allows for easy addition of more toppings, or food options