added update to comments with characters counter

backend/app/main.py

@@ -3,7 +3,7 @@
 from fastapi import FastAPI
 from fastapi.middleware.cors import CORSMiddleware
 
-from app.routers import address, contact, proposal, dewar, shipment
+from app.routers import address, contact, proposal, dewar, shipment, upload
 from app.database import Base, engine, SessionLocal, load_sample_data
 
 app = FastAPI()
@@ -35,6 +35,7 @@ app.include_router(address.router, prefix="/addresses", tags=["addresses"])
 app.include_router(proposal.router, prefix="/proposals", tags=["proposals"])
 app.include_router(dewar.router, prefix="/dewars", tags=["dewars"])
 app.include_router(shipment.router, prefix="/shipments", tags=["shipments"])
+app.include_router(upload.router, tags=["upload"])  # Removed the trailing '/' from the prefix
 
 if __name__ == "__main__":
     import uvicorn

backend/app/routers/upload.py

@@ -0,0 +1,35 @@
+# app/routers/upload.py
+
+from fastapi import APIRouter, UploadFile, File, HTTPException
+import os
+
+router = APIRouter()
+
+
+@router.post("/upload")
+async def upload_file(file: UploadFile = File(...)):
+    if not file.filename.endswith('.xlsx'):
+        raise HTTPException(status_code=400, detail="Invalid file format. Please upload an .xlsx file.")
+
+    save_path = os.path.join("uploads", file.filename)
+    os.makedirs(os.path.dirname(save_path), exist_ok=True)
+    with open(save_path, "wb") as buffer:
+        buffer.write(await file.read())
+
+    # Validate the file (add your validation logic here)
+    is_valid, summary, error = validate_file(save_path)
+    if not is_valid:
+        raise HTTPException(status_code=400, detail=error)
+
+    return summary
+
+
+def validate_file(file_path: str):
+    # Implement your file validation logic here
+    # For demo purpose, assuming it always succeeds
+    summary = {
+        "dewars": 5,
+        "pucks": 10,
+        "samples": 100,
+    }
+    return True, summary, None