aggregate 2

latest.py

@@ -0,0 +1,57 @@
+
+class Outbreak:
+    #Aggregate root
+    def change_latest(self, time):
+        try:
+            if Timeline.latest != time:
+                return Latest()
+            else:
+                raise ValueError
+        except ValueError:
+            print("latest data is not changed")
+
+
+##########################################################################################
+
+class Timeline(BaseModel):
+    """
+    Timeline model.
+    """
+
+    timeline: Dict[str, int] = {}
+
+    @validator("timeline")
+    @classmethod
+    def sort_timeline(cls, value):
+        """Sort the timeline history before inserting into the model"""
+        return dict(sorted(value.items()))
+
+    @property
+    def latest(self):
+        """Get latest available history value."""
+        return list(self.timeline.values())[-1] if self.timeline else 0
+
+    def serialize(self):
+        """
+        Serialize the model into dict
+        TODO: override dict() instead of using serialize
+        """
+        return {**self.dict(), "latest": self.latest}
+
+
+class Latest(BaseModel):
+    """
+    Latest model.
+    """
+
+    confirmed: int
+    deaths: int
+    recovered: int
+
+
+class LatestResponse(BaseModel):
+    """
+    Response for latest.
+    """
+
+    latest: Latest