Extract common functionality into reusable function.

1 files changed, 25 insertions, 7 deletions

diff --git a/uploader/monadic_requests.py b/uploader/monadic_requests.py
index aa34951..c492df5 100644
--- a/uploader/monadic_requests.py
+++ b/uploader/monadic_requests.py
@@ -5,13 +5,12 @@ from typing import Union, Optional, Callable
 import requests
 from requests.models import Response
 from pymonad.either import Left, Right, Either
-from flask import (
-    flash,
-    request,
-    redirect,
-    render_template,
-    current_app as app,
-    escape as flask_escape)
+from flask import (flash,
+                   request,
+                   redirect,
+                   render_template,
+                   current_app as app,
+                   escape as flask_escape)
 
 # HTML Status codes indicating a successful request.
 SUCCESS_CODES = (200, 201, 202, 203, 204, 205, 206, 207, 208, 226)
@@ -84,3 +83,22 @@ def post(url, data=None, json=None, **kwargs) -> Either:
         return Left(resp)
     except requests.exceptions.RequestException as exc:
         return Left(exc)
+
+
+def make_either_error_handler(msg):
+    """Make generic error handler for pymonads Either objects."""
+    def __fail__(error):
+        if issubclass(type(error), Exception):
+            app.logger.debug("\n\n%s (Exception)\n\n", msg, exc_info=True)
+            raise error
+        if issubclass(type(error), Response):
+            try:
+                _data = error.json()
+            except Exception as _exc:
+                raise Exception(error.content) from _exc
+            raise Exception(_data)
+
+        app.logger.debug("\n\n%s\n\n", msg)
+        raise Exception(error)
+
+    return __fail__