From 049a93fa26358210c0c12aaecc3f1812077af806 Mon Sep 17 00:00:00 2001
From: Daniel Roth <daniel_roth@hotmail.co.uk>
Date: Mon, 19 Jan 2026 11:47:32 +0000
Subject: [PATCH] =?UTF-8?q?Create=20FileType=20enum=20=F0=9F=9F=AA?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 backend/condition/file_type.py                | 12 ++++++++++
 backend/condition/parsing/factory.py          |  9 ++++----
 backend/condition/processor.py                |  2 +-
 .../tests/parsing/test_parsing_factory.py     | 15 ++++---------
 .../condition/tests/test_detect_file_type.py  | 22 +++++++++++++++++++
 5 files changed, 43 insertions(+), 17 deletions(-)
 create mode 100644 backend/condition/file_type.py
 create mode 100644 backend/condition/tests/test_detect_file_type.py

diff --git a/backend/condition/file_type.py b/backend/condition/file_type.py
new file mode 100644
index 00000000..b9a4357f
--- /dev/null
+++ b/backend/condition/file_type.py
@@ -0,0 +1,12 @@
+from enum import Enum
+
+class FileType(Enum):
+    LBWF = "lbwf"
+
+def detect_file_type(filepath: str) -> FileType:
+    path = filepath.lower()
+
+    if "lbwf" in path:
+        return FileType.LBWF
+    
+    raise ValueError("Unrecognised file path")
\ No newline at end of file
diff --git a/backend/condition/parsing/factory.py b/backend/condition/parsing/factory.py
index 7db8383f..01dce75d 100644
--- a/backend/condition/parsing/factory.py
+++ b/backend/condition/parsing/factory.py
@@ -1,10 +1,9 @@
+from backend.condition.file_type import FileType
 from backend.condition.parsing.parser import Parser
 from backend.condition.parsing.lbwf_parser import LbwfParser
 
-def select_parser(filepath: str) -> Parser:
-    path = filepath.lower()
-
-    if "lbwf" in path:
+def select_parser(file_type: FileType) -> Parser:
+    if file_type is FileType.LBWF:
         return LbwfParser()
 
-    raise ValueError("Unrecognised file path, unable to instantiate Parser")
\ No newline at end of file
+    raise ValueError("Unrecognised file type, unable to instantiate Parser")
diff --git a/backend/condition/processor.py b/backend/condition/processor.py
index 82f1b92e..c4dcabc2 100644
--- a/backend/condition/processor.py
+++ b/backend/condition/processor.py
@@ -1,6 +1,7 @@
 from typing import BinaryIO, List
 
 from utils.logger import setup_logger
+from backend.condition.file_type import FileType
 
 def process_file(file_stream: BinaryIO, source_key: str) -> None:
     print(f"[processor] Received file: {source_key}")
@@ -9,4 +10,3 @@ def process_file(file_stream: BinaryIO, source_key: str) -> None:
     
 
     # Orchestration
-
diff --git a/backend/condition/tests/parsing/test_parsing_factory.py b/backend/condition/tests/parsing/test_parsing_factory.py
index 4e373a12..481418d7 100644
--- a/backend/condition/tests/parsing/test_parsing_factory.py
+++ b/backend/condition/tests/parsing/test_parsing_factory.py
@@ -1,22 +1,15 @@
 import pytest
 
 from backend.condition.parsing.factory import select_parser
+from backend.condition.file_type import FileType
 
 def test_selects_lbwf_parser():
     # arrange
-    file_path_str = "uploads/lbwf/Example Asset Data.xlsx"
+    file_type = FileType.LBWF
     expected_class_name = "LbwfParser"
 
     # act
-    actual_class_name = select_parser(file_path_str).__class__.__name__
+    actual_class_name = select_parser(file_type).__class__.__name__
 
     # assert
-    assert expected_class_name == actual_class_name
-
-def test_unknown_filepath_raises_value_error():
-    # arrange
-    file_path_str = "unkown/Example Asset Data.xlsx"
-
-    # act + assert
-    with pytest.raises(ValueError):
-        select_parser(file_path_str)
\ No newline at end of file
+    assert expected_class_name == actual_class_name
\ No newline at end of file
diff --git a/backend/condition/tests/test_detect_file_type.py b/backend/condition/tests/test_detect_file_type.py
new file mode 100644
index 00000000..fecf22c1
--- /dev/null
+++ b/backend/condition/tests/test_detect_file_type.py
@@ -0,0 +1,22 @@
+import pytest
+
+from backend.condition.file_type import FileType, detect_file_type
+
+def test_detects_lbwf_file_type():
+    # arrange
+    file_path_str = "uploads/lbwf/Exaple Asset Data.xlsx"
+    expected_file_type = FileType.LBWF
+
+    # act
+    actual_file_type: FileType = detect_file_type(file_path_str)
+
+    # assert
+    assert expected_file_type == actual_file_type
+
+def test_unknown_filepath_raises_value_error():
+    # arrange
+    file_path_str = "unknown/Example Asset Data.xlsx"
+
+    # act + assert
+    with pytest.raises(ValueError):
+        detect_file_type(file_path_str)
\ No newline at end of file