forked from CatalinStefan/python-design-patterns
-
Notifications
You must be signed in to change notification settings - Fork 0
/
mediator.py
44 lines (30 loc) · 963 Bytes
/
mediator.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
from __future__ import annotations
class ChatUser:
mediator = None
def __init__(self, name: str):
self.name = name
def set_mediator(self, med: Mediator):
self.mediator = med
def send(self, msg: str):
print(f"{self.name}: Sending message {msg}")
self.mediator.send_message(msg, self)
def receive(self, msg: str):
print(f"{self.name}: Receiving message {msg}")
class Mediator:
users = []
def add_user(self, user: ChatUser):
self.users.append(user)
user.set_mediator(self)
def send_message(self, msg: str, user: ChatUser):
for u in self.users:
if u != user:
u.receive(msg)
if __name__ == '__main__':
mediator = Mediator()
alice = ChatUser("Alice")
bob = ChatUser("Bob")
carol = ChatUser("Carol")
mediator.add_user(alice)
mediator.add_user(bob)
mediator.add_user(carol)
carol.send("Hi everyone!")