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# Shopping cart implementation
import uuid
import sys
cartId = "1234"
# Get the shopping cart from the cache
# Return an empty cart if not found
def getcart(id, cache):
cart = cache("get", id)
if cart is None:
return ()
return cart
# Post a new item to the cart, create a new cart if necessary
def post(item, cache):
id = str(uuid.uuid1())
cart = ((item[0], id, item[2]),) + getcart(cartId, cache)
cache("put", cartId, cart)
return id
# Return the content of the cart
def getall(cache):
return ("Your Cart", cartId) + getcart(cartId, cache)
# Find an item in the cart
def find(id, cart):
if cart == ():
return ("Item", "0", ())
elif id == cart[0][1]:
return cart[0]
else:
return find(id, cart[1:])
# Get an item from the cart
def get(id, cache):
return find(id, getcart(cartId, cache))
# Delete the whole cart
def deleteall(cache):
return cache("delete", cartId)
# Delete an item from the cart
def delete(id, cache):
return true
# Return the price of an item
def price(item):
return float(filter(lambda x: x[0] == "'price", item[2])[0][1])
# Sum the prices of a list of items
def sum(items):
if items == ():
return 0
return price(items[0]) + sum(items[1:])
# Return the total price of the items in the cart
def gettotal(cache):
cart = getcart(cartId, cache)
return sum(cart)
# TODO remove these JSON-RPC specific functions
def listMethods(cache):
return ("Service.gettotal",)
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