block: try to unify the mirror block modules

app/models/__init__.py

@@ -78,18 +78,32 @@ class AbstractResource(db.Model):  # type: ignore
     def brn(self) -> BRN:
         raise NotImplementedError()
 
-    def deprecate(self, *, reason: str) -> None:
+    def deprecate(self, *, reason: str) -> bool:
+        """
+        Marks the resource as deprecated. In the event that the resource was already
+        deprecated, no change will be recorded and the function will return False.
+
+        :param reason: an opaque string that records the deprecation reason
+        :return: if the proxy was deprecated
+        """
         if self.deprecated is not None:
             logging.info("Deprecating %s (reason=%s)", self.brn, reason)
             self.deprecated = datetime.utcnow()
             self.deprecation_reason = reason
             self.updated = datetime.utcnow()
+            return True
         else:
             logging.info("Not deprecating %s (reason=%s) because it's already deprecated", self.brn, reason)
+            return False
 
     def destroy(self) -> None:
+        """
+        Marks the resource for destruction.
+
+        :return: None
+        """
         if self.deprecated is None:
-            self.deprecated = datetime.utcnow()
+            self.deprecate(reason="destroyed")
         self.destroyed = datetime.utcnow()
         self.updated = datetime.utcnow()