def __init__(self):
self.customers = Customers()
self.products = Products()
self.orders = Orders()
class Webshop:
def __init__(self):
self.customers = Customers()
self.products = Products()
self.orders = Orders()
def get_total_customers(self):
""" Return total number of customers
@rtype: integer
"""
return len(self.customers)
def get_total_products(self):
""" Return total number of products
@rtype: integer
"""
return len(self.products)
def get_total_orders(self):
""" Return total number of orders
@rtype: integer
"""
return len(self.orders)
def add_customer(self, email, first_name, last_name):
""" Add new customer if he/she does not exist (identified by email)
Return the new customer if successes otherwise None
@param email: email address
@type email: unicode string
@param first_name: first name
@type first_name: unicode string
@param last_name: last name
@type last_name: unicode string
@rtype: Customer
"""
if email not in self.customers:
self.customers.add(email, Customer(email, first_name, last_name))
return Customer(email, first_name, last_name)
else:
return None
def add_product(self, sku, name, description, price_ex_vat):
""" Add new product if it does not exist (identified by sku)
Return the new product if successes otherwise None
@param sku: SKU
@type sku: unicode string
@param name: name
@type name: unicode string
@param description: description
@type description: unicode string
@param price_ex_vat: price excluding vat
@type price_ex_vat: float
@rtype: Product
"""
if sku not in self.products:
self.products.add(sku, Product(sku, name, description, price_ex_vat))
return Product(sku,name ,description ,price_ex_vat)
else:
return None
def add_order(self, order_code, customer, products):
""" Add new order if it does not exist (identified by order_code)
Return the new order if successes otherwise None
@param order_code: unique code of each product
@type order_code: unicode string
@param customer: customer
@type customer: Customer
@param products: products
@type products: list of Product
@rtype: Order
"""
if order_code not in self.orders:
customer.add_order(Order(order_code, customer, products))
self.customers[customer.email].add_order(Order(order_code, customer, products))
self.orders.add(order_code, Order(order_code, customer, products))
return Order(order_code, customer, products)
else:
return None
def delete_customer(self, email):
""" Delete the customer who has the given email
Return True if successes otherwise False
@param email: email address
@type email: unicode string
@rtype: boolean
"""
if email in self.customers:
self.customers.remove(email)
return True
else:
return False
def delete_product(self, sku):
""" Delete the product which has the given sku
Return True if successes otherwise False
@param sku: SKU
@type sku: unicode string
@rtype: boolean
"""
if sku in self.products:
self.products.remove(sku)
return True
else:
return False
def delete_order(self, order_code):
""" Delete the order which has the given order_code
Return True if successes otherwise False
@param order_code: unique code of each product
@type order: unicode string
@rtype: boolean
"""
if order_code in self.orders:
self.orders.remove(order_code)
return True
else:
return False
def get_products_in_price_range(self, min_price=None, max_price=None):
""" Get products in the given range of price
@rtype: list of Product
"""
result = []
if max_price == None:
max_price = max(self.products.get_product_prices())
for product in self.products.values():
if (min_price <= product.price_ex_vat <= max_price):
result.append(product)
return result
def get_best_customers(self):
""" Return customers that have highest total price of orders
@rtype: list of Customer
"""
result = []
temp_dict = {}
for customer in self.customers.values():
for order in customer.orders:
if customer.email not in temp_dict.keys():
temp_dict[customer.email] = self.orders.total_prices_from_order(order)
else:
temp_dict[customer.email] += self.orders.total_prices_from_order(order)
max_value = max([price for price in temp_dict.values()])
for email, price_count in temp_dict.items():
if price_count == max_value:
result.append(self.customers[email])
return result
def get_orders_of_customer(self, email):
""" Get orders of the given customer
@param email: email address
@type email: unicode string
@rtype: list of Order
"""
return self.customers[email].orders
def get_customers_who_ordered_product(self, sku):
""" Get customers who ordered the given product
@param sku: SKU
@type sku: unicode string
@rtype: list of Customer
"""
result = []
for order in self.orders.values():
for product in order.products:
if product.sku == sku:
result.append(order.customer)
return result
def get_cheapest_products(self):
""" Return the cheapest products in the shop
@rtype: list of Product
"""
min_price = min(self.products.get_product_prices())
min_price_product = self.products.get_products_from_price(min_price)
return min_price_product
def get_most_expensive_products(self):
""" Return the most expensive products in the shop
@rtype: list of Product
"""
max_price = max(self.products.get_product_prices())
max_price_product = self.products.get_products_from_price(max_price)
return max_price_product
def get_top_products(self, n):
""" Return products that is ordered highest
@param n: number of products
@type n: integer
@rtype: list of Product
"""
temp_dict = {}
result = []
for order in self.orders.values():
for product in self.orders.get_products_from_order(order):
if product.sku not in temp_dict:
temp_dict[product.sku] = 1
else:
temp_dict[product.sku] += 1
i = 1
while i <= n:
max_value = max([item for item in temp_dict.values()])
for key, value in temp_dict.items():
if value == max_value:
result.append(self.products[key])
del temp_dict[key]
i += 1
return result