Added file_upload file

app/api/routers/file_upload.py

@@ -0,0 +1,34 @@
+from typing import Annotated
+from fastapi import FastAPI, File, UploadFile
+from app.categorization.file_processing import process_file, save_results
+from app.categorization.config import CATEGORY_REFERENCE_OUTPUT_FILE 
+import asyncio
+import os
+
+app = FastAPI()
+
+@app.post("/v1/file_upload")
+async def create_file(file: Annotated[bytes, File()]):
+    try:
+        with open(file.filename, 'wb') as f:
+            # Create directory to store all uploaded .csv files
+            file_upload_directory_path = "data/tx_data/input"
+            if not os.path.exists(file_upload_directory_path):
+                os.makedirs(file_upload_directory_path)
+
+            # Write items of .csv filte to directory
+            with open(os.path.join(file_upload_directory_path, file.filename)):
+                f.write(f.readlines)
+
+            # with the newly created file and it's path, process and save it for embedding
+            processed_file = process_file(os.path.realpath(file.filename))
+            result = await asyncio.gather(processed_file)
+            save_results(result)
+
+    except Exception:
+        return {"message": "There was an error uploading this file. Ensure you have a .csv file with the following columns:"
+        "\n source, date, type, category, description, amount"}
+    finally:
+        file.file.close()
+    
+    return {"message": f"Successfully uploaded {file.filename}"}