Allow for url uploads

ynr/apps/moderation_queue/helpers.py

@@ -49,7 +49,13 @@ def convert_image_to_png(photo):
     # Some uploaded images are CYMK, which gives you an error when
     # you try to write them as PNG, so convert to RGBA (this is
     # RGBA rather than RGB so that any alpha channel (transparency)
-    # is preserved).
+    # is preserved). At this point, the photo being passed is an opened
+    # PillowImage object
+
+    # if the photo was a url upload and is not a PillowImage object,
+    # convert it to a PillowImage object before converting
+    if not isinstance(photo, PillowImage.Image):
+        photo = PillowImage.open(photo)
     converted = photo.convert("RGBA")
     bytes_obj = BytesIO()
     converted.save(bytes_obj, "PNG")