added pdf processing

app.py

@@ -56,16 +56,15 @@ def process_text_file(file: AskFileResponse):
 
     file_extension = os.path.splitext(file.name)[1].lower()
 
-    with tempfile.NamedTemporaryFile(mode="w", delete=False, suffix=".txt") as temp_file:
+    with tempfile.NamedTemporaryFile(mode="wb", delete=False, suffix=file_extension) as temp_file:
         temp_file_path = temp_file.name
+        temp_file.write(file.content)
 
     if file_extension == ".txt":
-        with open(temp_file_path, "wb") as f:
-            f.write(file.content)
-
-        text_loader = TextFileLoader(temp_file_path)
-        documents = text_loader.load_documents()
-        texts = text_splitter.split_texts(documents)
+        with open(temp_file_path, "r", encoding="utf-8") as f:
+            text_loader = TextFileLoader(temp_file_path)
+            documents = text_loader.load_documents()
+            texts = text_splitter.split_texts(documents)
 
     elif file_extension == ".pdf":
         pdf_document = fitz.open(temp_file_path)