tweaks

backend/app/api/mix_calculator.py

@@ -22,7 +22,7 @@ from app.services.mix_calculator_service import (
     update_mix_calculator_session,
 )
 from app.services.mix_calculator_pdf import MixCalculatorPdfUnavailableError, build_mix_calculator_pdf
-from app.services.mix_calculator_filenames import mix_calculator_pdf_filename
+from app.services.mix_calculator_filenames import mix_calculator_pdf_filename, mix_calculator_preview_pdf_filename
 
 router = APIRouter(prefix="/api/mix-calculator", tags=["mix-calculator"])
 
@@ -56,6 +56,28 @@ def preview_mix_calculator_session(
         raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail=str(exc)) from exc
 
 
+@router.post("/preview/pdf")
+def preview_mix_calculator_session_pdf(
+    payload: MixCalculatorSessionCreate,
+    session: AuthSession = Depends(require_client_module_access("mix_calculator", "edit")),
+    db: Session = Depends(get_db),
+):
+    try:
+        preview = calculate_mix_calculator_preview(db, tenant_id=session.tenant_id or "", payload=payload)
+        pdf_bytes = build_mix_calculator_pdf(preview)
+    except ValueError as exc:
+        raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail=str(exc)) from exc
+    except MixCalculatorPdfUnavailableError as exc:
+        raise HTTPException(status_code=status.HTTP_503_SERVICE_UNAVAILABLE, detail=str(exc)) from exc
+
+    filename = mix_calculator_preview_pdf_filename(MixCalculatorPreviewRead.model_validate(preview))
+    return Response(
+        content=pdf_bytes,
+        media_type="application/pdf",
+        headers={"Content-Disposition": f'attachment; filename="{filename}"'},
+    )
+
+
 @router.post("", response_model=MixCalculatorSessionRead, status_code=status.HTTP_201_CREATED)
 def create_saved_mix_calculator_session(
     payload: MixCalculatorSessionCreate,