✨ 전략패턴

design_pattern_practice/strategy_pattern.py

@@ -0,0 +1,44 @@
+from abc import ABC, abstractmethod
+
+
+class Notifier(ABC):
+  @abstractmethod
+  def notify(self, recipient: str, message: str) -> None:
+    pass
+
+
+class EmailNotifier(Notifier):
+  def notify(self, recipient, message):
+    print(message)
+
+
+class PhoneNotifier(Notifier):
+  def notify(self, recipient, message):
+    print(message)
+
+
+class Product():
+  def __init__(self, name: str, owner: str):
+    self.name = name
+    self.owner = owner
+
+
+class OrderService:
+  def __init__(self, notifier: Notifier):
+    self.notifier = notifier
+
+  def set_notifier(self, notifier: Notifier):
+    self.notifier = notifier
+
+  def order(self, product: Product, quantity: int):
+    self.notifier.notify(product.owner, f"[주문알림] \"{product.name}\" 상품 {quantity}개 주문이 들어왔습니다")
+
+
+if __name__ == "__main__":
+  onion_chicken = Product("마늘 치킨", "삼성통닭")
+
+  order_service = OrderService(PhoneNotifier())
+  order_service.order(onion_chicken, 2)
+
+  order_service.set_notifier(EmailNotifier())
+  order_service.order(onion_chicken, 5)