Bluesky => fediverse: some @-mention hrefs not converted

[snarfed]

Odd, we should be wrapping Bluesky @-mention tag.hrefs in our own URLs that convert them to AS2, but at least sometimes we're not. Example: https://bsky.brid.gy/convert/ap/at://did:plc:phxtnvotfvp6322ew3rlrvyl/app.bsky.feed.post/3lclqo2v5a225 , visible on https://www.threads.net/fediverse_profile/[email protected] , note the second tag has href: https://bsky.app/profile/snarfed.org:

{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {"_misskey_quote": "https://misskey-hub.net/ns#_misskey_quote"}
  ],
  "type": "Note",
  "id": "https://bsky.brid.gy/convert/ap/at://did:plc:phxtnvotfvp6322ew3rlrvyl/app.bsky.feed.post/3lclqo2v5a225",
  "url": "https://bsky.brid.gy/r/https://bsky.app/profile/did:plc:phxtnvotfvp6322ew3rlrvyl/post/3lclqo2v5a225",
  "_misskey_quote": "https://threads.net/ap/users/17841400539003309/post/18044832881277913/",
  "attributedTo": "https://bsky.brid.gy/ap/did:plc:phxtnvotfvp6322ew3rlrvyl",
  "content": "<p>OMG OMG OMG we're able to bridge our threads accounts into Blue sky via federation <a class=\"mention\" href=\"https://ap.brid.gy/ap.brid.gy\">@ap.brid.gy</a>  & <a class=\"mention\" href=\"https://bsky.app/profile/snarfed.org\">@snarfed.org</a><br><br>RE: <a href=\"https://bsky.app/profile/did:plc:4ghwklnin2mvmam4ditdwv2o/post/3lclod7ptodd2\">https://bsky.app/profile/did:plc:4ghwklnin2mvmam4ditdwv2o/post/3lclod7ptodd2</a></p>",
  "contentMap": {
    "en": "OMG OMG OMG we're able to bridge our threads accounts into Blue sky via federation @ap.brid.gy  & @snarfed.org"
  },
  "published": "2024-12-05T22:45:35.222Z",
  "quoteUrl": "https://threads.net/ap/users/17841400539003309/post/18044832881277913/",
  "tag": [
    {
      "href": "https://ap.brid.gy/ap.brid.gy",
      "name": "@ap.brid.gy",
      "type": "Mention"
    },
    {
      "href": "https://bsky.app/profile/snarfed.org",
      "name": "@snarfed.org",
      "type": "Mention"
    },
    {
      "href": "https://threads.net/ap/users/17841400539003309/post/18044832881277913/",
      "mediaType": "application/ld+json; profile=\"https://www.w3.org/ns/activitystreams\"",
      "name": "RE: https://bsky.app/profile/did:plc:4ghwklnin2mvmam4ditdwv2o/post/3lclod7ptodd2",
      "type": "Link"
    }
  ],
  "to": ["https://www.w3.org/ns/activitystreams#Public"],
  "cc": ["https://bsky.app/profile/snarfed.org"],
}

[Tamschi]

The contentMap should contain HTML too, that's another bug.

I'll have to check whether Mastodon prefers content and if that breaks auto-translate.

[snarfed]

Last I checked Mastodon was happy with this and allowed auto-translate on it.

[Tamschi]

Yes, the answers are 'Yes' and 'No.' respectively:

• https://github.com/mastodon/mastodon/blob/8dc7f8533d1819fe812f96f0f092b3e7086dffe9/app/lib/activitypub/parser/status_parser.rb#L34-L40
• https://github.com/mastodon/mastodon/blob/8dc7f8533d1819fe812f96f0f092b3e7086dffe9/app/lib/activitypub/parser/status_parser.rb#L34-L40

Which has some edge cases where it would definitely break down, but it's the safest option while they have no actual multi-language support.

I'll still file a bug because Bridgy Fed's behaviour here would break anything that does have proper post internationalisation.

[Tamschi]

There's an invalid comma in the second-to-last line above.

What's quoteUrl? It's missing from the contexts.

[snarfed]

Hah yes, feel free to ignore JSON comma issues in activities and objects I pasted in here, it's from me manually moving around fields a bit to put type, id, etc near the top.

quoteUrl came from Misskey, it was evidently mistakenly attributed to AS2, as https://www.w3.org/ns/activitystreams#quoteUrl , even though it doesn't actually exist there.

#461 (comment)
https://misskey-hub.net/ns#_misskey_quote
misskey-dev/misskey#8722 (comment)

The same question got asked in #461 (comment) back when we launched this.

So good point, you're right that quoteUrl is missing from context. It might exist in some context I could add, but I don't know what.

...having said that, to be honest, I run out of patience pretty quickly for fiddling with @context to make overly-strict JSON-LD consumers happy with unknown fields when both JSON-LD and @context are optional in AP. (I know this is a controversial point.) If some fedi software blows up and chokes on any activity with any field that isn't perfectly specified in @context, I don't have a ton of motivation personally to put a lot of effort into satisfying them. Not claiming that's right of me, just describing where my head is at.

[Tamschi]

Ah right, I remember seeing that aside in their extensions page now, must have forgotten.

It would be nice if they mentioned which other "other ActivityPub programs" require it 😕