#!/usr/bin/env python
#http://danse.us/trac/engdiffraction/wiki/InternalTraining/UnifiedModelingLanguage

from employees import PizzaRobot, Server

class Customer:
    def __init__(self, name):
        self.name = name
    def order(self, server):
        print self.name, "orders from", server
    def pay(self, server):
        print self.name, "pays for item to", server

class Oven:
    def bake(self):
        print "oven bakes"

class PizzaShop:
    def __init__(self):
        self.server = Server('Pat')         # embed other objects
        self.chef   = PizzaRobot('Bob')     # a robot named bob
        self.oven   = Oven()

    def order(self, name):
        customer = Customer(name)           # activate other objects
        customer.order(self.server.name)    # customer orders from server
        self.chef.work()
        self.oven.bake()
        customer.pay(self.server.name)

if __name__ == "__main__":
    scene = PizzaShop()                     # make the composite
    scene.order('Homer')                    # simulate Homer's order
    print '...'
    scene.order('Shaggy')                   # simulate Shaggy's order
    
# Output
"""
Homer orders from Pat
Bob makes pizza
oven bakes
Homer pays for item to Pat
...
Shaggy orders from Pat
Bob makes pizza
oven bakes
Shaggy pays for item to Pat
"""