eksplicit mapping af envs

backend/app/services/stats_service.py

@@ -0,0 +1,60 @@
+from datetime import UTC, date, datetime
+
+import sqlalchemy as sa
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.models.db_models import DailyStat, InterestCategoryCount
+from app.services.session_service import count_active_sessions
+
+
+async def get_stats(db: AsyncSession) -> dict:
+    """Return anonymised aggregate stats for the admin dashboard."""
+    today = date.today()
+
+    row = await db.scalar(
+        sa.select(DailyStat).where(DailyStat.date == today)
+    )
+
+    top_categories_rows = await db.scalars(
+        sa.select(InterestCategoryCount)
+        .where(InterestCategoryCount.date == today)
+        .order_by(InterestCategoryCount.count.desc())
+        .limit(5)
+    )
+    top_categories = [r.category for r in top_categories_rows]
+    active = await count_active_sessions()
+
+    return {
+        "total_sessions_today": row.total_sessions if row else 0,
+        "total_matches_today": row.total_matches if row else 0,
+        "active_sessions_now": active,
+        "top_interest_categories": top_categories,
+    }
+
+
+async def increment_sessions(db: AsyncSession) -> None:
+    """Increment daily session counter. Called when a new session is created."""
+    today = date.today()
+    await db.execute(
+        sa.dialects.postgresql.insert(DailyStat)
+        .values(date=today, total_sessions=1, total_matches=0)
+        .on_conflict_do_update(
+            index_elements=["date"],
+            set_={"total_sessions": DailyStat.total_sessions + 1},
+        )
+    )
+    await db.commit()
+
+
+async def increment_matches(db: AsyncSession) -> None:
+    """Increment daily match counter. Called on a successful match."""
+    today = date.today()
+    await db.execute(
+        sa.dialects.postgresql.insert(DailyStat)
+        .values(date=today, total_sessions=0, total_matches=1)
+        .on_conflict_do_update(
+            index_elements=["date"],
+            set_={"total_matches": DailyStat.total_matches + 1},
+        )
+    )
+    await db.commit()