Refactor base use case class to really become an abstract base class

berinhard · berinhard · commit 29d3593277b4 · 2021-11-25T17:26:14.000-03:00
diff --git a/sponsors/use_cases.py b/sponsors/use_cases.py
@@ -1,22 +1,28 @@
+from abc import ABC, abstractmethod
+
 from sponsors import notifications
 from sponsors.models import Sponsorship, Contract, SponsorContact, SponsorEmailNotificationTemplate
 from sponsors.pdf import render_contract_to_pdf_file, render_contract_to_docx_file
 
 
-class BaseUseCaseWithNotifications:
+class BaseUseCaseWithNotifications(ABC):
     notifications = []
 
+    @classmethod
+    def build(cls):
+        return cls(cls.notifications)
+
+    @abstractmethod
+    def execute(self, *args, **kwargs):
+        pass
+
     def __init__(self, notifications):
         self.notifications = notifications
 
     def notify(self, **kwargs):
         for notification in self.notifications:
             notification.notify(**kwargs)
 
-    @classmethod
-    def build(cls):
-        return cls(cls.notifications)
-
 
 class CreateSponsorshipApplicationUseCase(BaseUseCaseWithNotifications):
     notifications = [
