From 7c668176999c76da63e7fd24503d4653e384485c Mon Sep 17 00:00:00 2001
From: Pbhacks <priyantbanerjee@gmail.com>
Date: Sun, 8 Mar 2026 18:25:03 +0530
Subject: [PATCH] fix(filler): replace timestamp filename with uuid4 to prevent
 race condition

Resolves #198

The output PDF filename was generated using datetime.now().strftime('%Y%m%d_%H%M%S')
which has only 1-second resolution. Two concurrent requests in the same second
produced identical output paths, causing one to silently overwrite the other.

Replaced with uuid4() to guarantee globally unique filenames regardless of timing.
---
 src/filler.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/filler.py b/src/filler.py
index e31e535..c99e8e2 100644
--- a/src/filler.py
+++ b/src/filler.py
@@ -1,6 +1,6 @@
 from pdfrw import PdfReader, PdfWriter
 from src.llm import LLM
-from datetime import datetime
+from uuid import uuid4
 
 
 class Filler:
@@ -15,7 +15,7 @@ def fill_form(self, pdf_form: str, llm: LLM):
         output_pdf = (
             pdf_form[:-4]
             + "_"
-            + datetime.now().strftime("%Y%m%d_%H%M%S")
+            + str(uuid4())
             + "_filled.pdf"
         )