Implemented bulk upload by passing a json structure. Added delete all channels, groups and priorities

app/routers/priorities.py

@@ -59,6 +59,34 @@ def get_priority(
     return priority
 
 
+@router.delete("/", status_code=status.HTTP_200_OK)
+@require_roles("admin")
+def delete_priorities(
+    db: Session = Depends(get_db),
+    user: CognitoUser = Depends(get_current_user),
+):
+    """Delete all priorities not in use by channel URLs"""
+    from app.models.db import ChannelURL
+
+    priorities = db.query(Priority).all()
+    deleted = 0
+    skipped = 0
+
+    for priority in priorities:
+        in_use = db.scalar(
+            select(ChannelURL).where(ChannelURL.priority_id == priority.id).limit(1)
+        )
+
+        if not in_use:
+            db.delete(priority)
+            deleted += 1
+        else:
+            skipped += 1
+
+    db.commit()
+    return {"deleted": deleted, "skipped": skipped}
+
+
 @router.delete("/{priority_id}", status_code=status.HTTP_204_NO_CONTENT)
 @require_roles("admin")
 def delete_priority(