How can I implement the mediator pattern in my project?

How can I implement the mediator pattern in my project?

The mediator pattern is a behavioral design pattern that allows objects to communicate through a central mediator instead of directly. This reduces dependencies between objects. Would you like a code example?

Yes, please provide a code example in Python.

Sure! Here's a simple example:

class Mediator:
    def notify(self, sender, event):
        pass

class ConcreteMediator(Mediator):
    def __init__(self, component1, component2):
        self.component1 = component1
        self.component1.mediator = self
        self.component2 = component2
        self.component2.mediator = self

    def notify(self, sender, event):
        if event == "A":
            print("Mediator reacts on A and triggers:")
            self.component2.do_c()

class Component:
    def __init__(self, mediator):
        self.mediator = mediator

class Component1(Component):
    def do_a(self):
        print("Component 1 does A.")
        self.mediator.notify(self, "A")

class Component2(Component):
    def do_c(self):
        print("Component 2 does C.")

# Usage
c1 = Component1(None)
c2 = Component2(None)
mediator = ConcreteMediator(c1, c2)

c1.do_a()

This code demonstrates how components communicate through a mediator.

That's a great example! How do I decide when to use the mediator pattern?

You should consider using the mediator pattern when you have a complex set of interactions between objects that can lead to tight coupling. It helps to simplify communication and reduce dependencies.