def __init__(self, category, item_name='item'):
Component.__init__(self, Item.item_id, item_name)
Item.item_id += 1
self.item_name = item_name
self.category = category
self.orders_of_item = set()
if not self.category:
raise CategoryIsNotDefine()
else:
self.category.items_of_category.add(Component.__str__(self))
Item.all_items.add(Component.__str__(self))
def __str__(self):
return '\n{0} \n{1}'.format(Component.__str__(self),
('includes items:\n' +
Component.show_items(
self.items_of_category)) if
self.items_of_category else
"hasn't got items")
def __str__(self):
return '\n{0} \n{1}\n'.format(Component.__str__(self),
('is included in orders:\n' +
Component.show_items(
self.orders_of_item) if
self.orders_of_item else
"hasn't been included in any orders"))
def __init__(self, customer=None, first_item=None, order_name='order'):
Component.__init__(self, Order.order_id, order_name)
Order.order_id += 1
self.order_name = order_name
self.items_of_order = set()
if not customer:
raise CustomerIsNotDefine()
else:
self.customer = customer
self.customer.orders_of_customer.add(Component.__str__(self))
if not first_item:
raise FirstItemIsNotDefine()
else:
self.first_item = first_item
self.items_of_order.add(Component.__str__(self.first_item))
self.first_item.orders_of_item.add(Component.__str__(self))
Order.all_orders.add(Component.__str__(self))
def __init__(self, category_name='Category'):
Component.__init__(self, Category.category_id, category_name)
Category.category_id += 1
self.category_name = category_name
self.items_of_category = set()
Category.all_categories.add(Component.__str__(self))
def remove(self, item):
self.items_of_category.remove(Component.__str__(item))
def add_item(self, item):
self.items_of_category.add(Component.__str__(item))
def __str__(self):
return '\n{0}\nowner: {1}\nordered items:\n{2}'.format(
Component.__str__(self), Component.__str__(self.customer),
Component.show_items(self.items_of_order))
def remove_item(self, removing_item):
self.items_of_order.remove(Component.__str__(removing_item))
if not self.items_of_order:
raise FirstItemIsNotDefine()
removing_item.orders_of_item.remove(Component.__str__(self))
def add_item(self, new_item):
self.items_of_order.add(Component.__str__(new_item))
new_item.orders_of_item.add(Component.__str__(self))
def __init__(self, customer_name='Customer'):
Component.__init__(self, Customer.customer_id, customer_name)
Customer.customer_id += 1
self.customer_name = customer_name
self.orders_of_customer = set()
Customer.all_customers.add(Component.__str__(self))
def __str__(self):
return '\n{0}\n{1}\n'.format(
Component.__str__(self),
('has made orders:\n' +
Component.show_items(self.orders_of_customer)
if self.orders_of_customer else "hasn't got orders"))
def add_order(self, first_item):
new_order = Order(self, first_item)
self.orders_of_customer.add(Component.__str__(new_order))
def change_category(self, new_category):
new_category.items_of_category.add(Component.__str__(self))
self.category.items_of_category.remove(Component.__str__(self))
self.category = new_category
