Implement workout item and set deletion endpoints, enhance API response handling for empty responses

services/logic/app/main.py

@@ -323,6 +323,61 @@ def add_workout_set(
     return workout_set
 
 
+@app.delete(
+    "/internal/workout-items/{item_id}",
+    dependencies=[InternalAuth],
+    status_code=status.HTTP_204_NO_CONTENT,
+)
+def delete_workout_item(item_id: uuid.UUID, db: Db, user_id: CurrentUserId) -> None:
+    item = db.scalar(
+        select(WorkoutItem)
+        .join(Workout)
+        .where(WorkoutItem.id == item_id, Workout.user_id == user_id)
+    )
+    if not item:
+        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Workout item not found")
+    workout = db.get(Workout, item.workout_id)
+    if workout and workout.finished_at:
+        raise HTTPException(status_code=status.HTTP_409_CONFLICT, detail="Workout already finished")
+    workout_id = item.workout_id
+    db.delete(item)
+    db.flush()
+    recalculate_workout_calories(db, workout_id)
+    db.commit()
+
+
+@app.delete(
+    "/internal/workout-items/{item_id}/sets/{set_id}",
+    dependencies=[InternalAuth],
+    status_code=status.HTTP_204_NO_CONTENT,
+)
+def delete_workout_set(
+    item_id: uuid.UUID, set_id: uuid.UUID, db: Db, user_id: CurrentUserId
+) -> None:
+    ws = db.scalar(
+        select(WorkoutSet)
+        .join(WorkoutItem)
+        .join(Workout)
+        .where(
+            WorkoutSet.id == set_id,
+            WorkoutItem.id == item_id,
+            Workout.user_id == user_id,
+        )
+    )
+    if not ws:
+        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Set not found")
+    workout = db.scalar(
+        select(Workout).join(WorkoutItem).where(WorkoutItem.id == item_id)
+    )
+    if workout and workout.finished_at:
+        raise HTTPException(status_code=status.HTTP_409_CONFLICT, detail="Workout already finished")
+    db.delete(ws)
+    db.flush()
+    if workout:
+        recalculate_workout_calories(db, workout.id)
+    db.commit()
+
+
 def estimate_set_calories(item: WorkoutItem, payload: WorkoutSetCreate) -> float:
     if item.exercise and item.exercise.default_calories_per_minute and payload.duration_seconds:
         return round(