Support instances with a different federation domain

[RealOrangeOne]

For example, my Mastodon instance federates as theorangeone.net, but is deployed at mastodon.theorangeone.net. This results in the wrong (but still valid) handle being shown:

Instead, it should be @jake@theorangeone.net - although I'm only assuming this information is available from the APIs.

[anze3db]

Hm... this is all the data that I have on your account:

id	username	acct	display_name	locked	bot	discoverable	group	noindex	created_at	last_status_at	last_sync_at	followers_count	following_count	statuses_count	note	url	avatar	avatar_static	header	header_static	emojis	roles	fields	instance	account_id	moved
2943694	jake	jake	Jake Howard	f	f	t	f	f	2022-11-06 00:00:00+00	2024-06-18 01:00:00+01	2024-06-18 10:23:23.116262+01	187	184	142	Part Developer, Part SysAdmin, Part InfoSec. Avid self-hoster, lover of #OpenSource. All things systems @ Torchbox. Core, Security & Performance @ Wagtail. Mostly writing :python: and :django:, but I do love :rust:! Opinions are a belief or construct held with confidence.	https://mastodon.theorangeone.net/@jake	https://mastodon.theorangeone.net/system/accounts/avatars/109/298/767/812/734/272/original/8e22d82522289933.png	https://mastodon.theorangeone.net/system/accounts/avatars/109/298/767/812/734/272/original/8e22d82522289933.png	https://mastodon.theorangeone.net/system/accounts/headers/109/298/767/812/734/272/original/92a2538671ecacc7.webp	https://mastodon.theorangeone.net/system/accounts/headers/109/298/767/812/734/272/original/92a2538671ecacc7.webp	[{"url": "https://mastodon.theorangeone.net/system/custom_emojis/images/000/013/205/original/a1a7b9de197e9c7b.png", "shortcode": "python", "static_url": "https://mastodon.theorangeone.net/system/custom_emojis/images/000/013/205/static/a1a7b9de197e9c7b.png", "visible_in_picker": true}, {"url": "https://mastodon.theorangeone.net/system/custom_emojis/images/000/013/206/original/75d98a48af14145f.png", "shortcode": "django", "static_url": "https://mastodon.theorangeone.net/system/custom_emojis/images/000/013/206/static/75d98a48af14145f.png", "visible_in_picker": true}, {"url": "https://mastodon.theorangeone.net/system/custom_emojis/images/000/013/207/original/62ad06a884dd16dd.png", "shortcode": "rust", "static_url": "https://mastodon.theorangeone.net/system/custom_emojis/images/000/013/207/static/62ad06a884dd16dd.png", "visible_in_picker": true}]	[{"id": "3", "name": "Owner", "color": ""}]	[{"name": "Website", "value": "<a href=\"https://theorangeone.net\" target=\"_blank\" rel=\"nofollow noopener noreferrer me\" translate=\"no\"><span class=\"invisible\">https://<span class=\"\">theorangeone.net<span class=\"invisible\">", "verified_at": "2023-07-21T07:56:08.178+00:00"}, {"name": "GitHub", "value": "<a href=\"https://github.com/RealOrangeOne\" target=\"_blank\" rel=\"nofollow noopener noreferrer me\" translate=\"no\"><span class=\"invisible\">https://<span class=\"\">github.com/RealOrangeOne<span class=\"invisible\">", "verified_at": null}, {"name": "Twiter", "value": "<a href=\"https://twitter.com/RealOrangeOne\" target=\"_blank\" rel=\"nofollow noopener noreferrer me\" translate=\"no\"><span class=\"invisible\">https://<span class=\"\">twitter.com/RealOrangeOne<span class=\"invisible\">", "verified_at": null}]	mastodon.theorangeone.net	109298767812734272

(all of this is from the public API of your instance, but let me know if you prefer if I remove it from this comment).

As you can see, all the fields point to mastodon.theorangeone.net. Can you check if there is a way for you to adjust the fields on your end? I don't have my own Mastodon instance so I don't know what options are there.

[RealOrangeOne]

It's something which is configured when you deploy Mastodon, as opposed to in the UI. However, I think I've found the solution.

It looks like you've made the assumption that the domain of the instance is the federating domain (example). In fact, there's an API you should use per-instance to get this information:

https://mastodon.theorangeone.net/api/v2/instance shows the domain key as being theorangeone.net (as it should), whereas for a simpler server (https://fosstodon.org/api/v2/instance), it's still fosstodon.org. Unfortunately, it's another API call, but it can be done once per server. A person's username then becomes {acct}@{domain} if you're pulling the user's details directly from the instance. There's a tiny footnote here about that. Unfortunately, that might be a large change :sweat_smile:

[anze3db]

If it's just one API call per instance to figure this out it shouldn't be a big deal. I'll get it done, but only in a couple of days because I'm getting swamped at work and in personal life right now 😅

(I also want to contribute to your Django Tasks project, but just hadn't had the time yet!)

[RealOrangeOne]

Absolutely no rush :grin: It seems to work as-is now - it's just a nice optimisation.

[anze3db]

@RealOrangeOne sorry this took so long, but it's finally done 🎉