refactors

backend/repositories/availability.py

@@ -0,0 +1,41 @@
+"""Availability repository for database queries."""
+
+from datetime import date
+
+from sqlalchemy import and_, delete, select
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from models import Availability
+
+
+class AvailabilityRepository:
+    """Repository for availability-related database queries."""
+
+    def __init__(self, db: AsyncSession):
+        self.db = db
+
+    async def get_by_date_range(
+        self, from_date: date, to_date: date
+    ) -> list[Availability]:
+        """Get availability slots for a date range."""
+        result = await self.db.execute(
+            select(Availability)
+            .where(and_(Availability.date >= from_date, Availability.date <= to_date))
+            .order_by(Availability.date, Availability.start_time)
+        )
+        return list(result.scalars().all())
+
+    async def get_by_date(self, target_date: date) -> list[Availability]:
+        """Get availability slots for a specific date."""
+        result = await self.db.execute(
+            select(Availability)
+            .where(Availability.date == target_date)
+            .order_by(Availability.start_time)
+        )
+        return list(result.scalars().all())
+
+    async def delete_by_date(self, target_date: date) -> None:
+        """Delete all availability for a specific date."""
+        await self.db.execute(
+            delete(Availability).where(Availability.date == target_date)
+        )