def listen(self):
print(f'Listening in {self.host}:{self.port}...\n\n')
with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as sock:
sock.bind((self.host, self.port))
while True:
sock.listen()
conn, addr = sock.accept()
with conn:
while True:
data = conn.recv(1024)
if not data:
raise Exception('Client disconnected')
print(f'Received: {data}')
try:
message_resp = self.message_handler(message=Message.deserialize(data))
except:
message_resp = MessageManager.create_invalid_message()
conn.sendall(str.encode(f'{message_resp.serialize()}'))
break
def message_handler(self, message):
"""
Message handler. Translate every received message in a valid manager action and returns a valid message
with the response of the action.
message: MessageItem object
return: MessageItem object
"""
if message.code == Message.CREATE_BASKET_MESSAGE:
basket_code = self.manager.create()
return MessageManager.create_basket_message(basket_code)
if message.code == Message.REMOVE_BASKET_MESSAGE:
basket_code = message.content['basket_code']
self.manager.remove(basket_code)
return MessageManager.create_ack_message()
if message.code == Message.ADD_PRODUCT_MESSAGE:
basket_code = message.content['basket_code']
product_code = message.content['product_code']
self.manager.add_product(basket_code, product_code)
return MessageManager.create_ack_message()
if message.code == Message.REMOVE_PRODUCT_MESSAGE:
basket_code = message.content['basket_code']
product_code = message.content['product_code']
self.manager.remove_product(basket_code, product_code)
return MessageManager.create_ack_message()
if message.code == Message.GET_PRODUCTS_MESSAGE:
basket_code = message.content['basket_code']
products = self.manager.get_products(basket_code)
return MessageManager.get_products_message(products=products)
if message.code == Message.GET_CHECKOUT_MESSAGE:
basket_code = message.content['basket_code']
total = self.manager.checkout(basket_code)
return MessageManager.get_checkout_message(total=total)
return MessageManager.create_invalid_message()