@ThiefMaster I'd need some help here.

1. Do you have an exhaustive list of cases? I made my own, but I bet it's not accurate.
2. There are other cases out of the event scope, like ImportMembersCSVForm. How should we handle the event-specific CSVFieldDelimiter enum? I was thinking to place it in a generic place, but again I think you'd definitely know the best place for it.

1. I think searching the code for accepted_file_types='.csv gives you all the locations.
2. You mean where to have the CSVFieldDelimiter definition? I've keep it where it is now. Even the category roles stuff is currently in the events module even though it's also reused by the categories module... one of those "could be improved in the future" things. But I think adding a new indico/util/csv.py or whatever would be overkill just to put that enum there.

Ugh I just realized that CSVFieldDelimiter isn't just event scoped but event/registration scoped. That makes it a bit uglier...

Maybe indico/util/spreadsheets.py is not a completely bad place for it?

@ThiefMaster thanks, that helped a lot. All yours 😄