Send download URL via API

[TrueBrain]

For new-games, anyone should be able to get the download URLs.
For savegames-only, only the author should be able to get the download URL.

[nielsmh]

Send download URL via API when... who does what?

[TrueBrain]

All good questions, of which I am pretty sure nobody has an answer yet.

This is a backend ticket, as are all the other tickets in this repo, and as that goes: only adding stuff to the backend is not useful. A PR fixing this should also be accompanied by an PR in https://github.com/OpenTTD/bananas-frontend-web to make use of this. That repo is published at https://bananas.openttd.org/package/base-graphics . Here you can see "available ingame", which should in fact be a download link, supplied by the API. This ticket is about making that possible.

Who-ever implements this should look how the rest of the API is done (hint: swaggerhub has the API specs) and find an appropriate place to add this. I would suggest to talk over the plan with me or @frosch123 before making the real implementation.

Any more information or any specifics, feel free to ask (either here or on IRC). But I think this should be enough guidance to make this happen :) To be clear, this is a relative simple / trivial ticket, about sending data already available down the pipe :)

[frosch123]

From the API point of view, the download URL should be part of the VersionMinimized structure.

• Present for all versions tagged as "available for new-games".
• Present for all versions, if authenticated as author of the package.

However, I think the download URL (read: full md5sum) is currently only known to the bananas-server, not to the bananas-api. So this is probably the hard part.