feat: subs and views

src/usecase/views/get_views_history.py

@@ -0,0 +1,37 @@
+import logging
+from typing import TYPE_CHECKING
+
+from src import domain, dto
+
+if TYPE_CHECKING:
+    from .. import Usecase
+
+log = logging.getLogger(__name__)
+
+
+async def get_views_history(self: 'Usecase', input: dto.GetViewsHistoryInput) -> dto.GetViewsHistoryOutput:
+    """Получить историю просмотров для закупа."""
+    async with self.database.transaction():
+        purchase = await self.database.get_purchase(input.user_id, input.purchase_id)
+        if not purchase:
+            log.warning('Purchase %s not found for user %s', input.purchase_id, input.user_id)
+            raise domain.PurchaseNotFound(input.purchase_id)
+
+        snapshots = await self.database.get_views_history(
+            input.purchase_id,
+            from_date=input.from_date,
+            to_date=input.to_date,
+        )
+
+    return dto.GetViewsHistoryOutput(
+        snapshots=[
+            dto.ViewsSnapshotOutput(
+                id=snapshot.id,
+                purchase_id=snapshot.purchase_id,
+                views_count=snapshot.views_count,
+                fetched_at=snapshot.fetched_at,
+                created_at=snapshot.created_at,
+            )
+            for snapshot in snapshots
+        ]
+    )