Support IceShrimp.NETs reply backfill feature via exposing a replies collection in activities

What feature would you like implemented? IceShrimp.NET now has a feature where it can use the replies collection on activities in order to backfill replies. At the moment Misskey and its forks do not support this property, forgoing it entirely, likely due to the complexities of correctly implementing ActivityPub collections.

Why should we add this feature? Adding this would start to pave the way for a wider, standardized means for instances to backfill replies, which is a feature I hear talked about time and time again by end users. If we could get this upstreamed, implementations could finally have a reliable means to backfill replies across all major fediverse implementations without having to rely on hacks like using the unauthenticated mastodon API (much like rebased uses to bypass secure fetch, I might add).

Version 2024.8.2.1-eepy

Instance eepy.moe

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added enhancement label

marked this issue as related to #266

I'd like to add that this is an existing feature in mastodon. Here is the difference between our AP representation of a note.

Ours (stripped one of the inline contexts out):

{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    "https://w3id.org/security/v1",
    {
    }
  ],
  "id": "https://kitsunes.club/notes/a0r5o73ka9",
  "type": "Note",
  "attributedTo": "https://kitsunes.club/users/9y8o9tb53d",
  "content": "<p>test</p>",
  "_misskey_content": "test",
  "source": {
    "content": "test",
    "mediaType": "text/x.misskeymarkdown"
  },
  "published": "2024-11-18T22:22:34.736Z",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "cc": [
    "https://kitsunes.club/users/9y8o9tb53d/followers"
  ],
  "inReplyTo": null,
  "attachment": [],
  "sensitive": false,
  "tag": []
}

Mastodon's (stripped of inline context object).

{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
    }
  ],
  "id": "https://fedi.rrr.sh/users/inquisitiveuprising/statuses/113506321772940061",
  "type": "Note",
  "summary": null,
  "inReplyTo": null,
  "published": "2024-11-18T22:30:21Z",
  "url": "https://fedi.rrr.sh/@inquisitiveuprising/113506321772940061",
  "attributedTo": "https://fedi.rrr.sh/users/inquisitiveuprising",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "cc": [
    "https://fedi.rrr.sh/users/inquisitiveuprising/followers"
  ],
  "sensitive": false,
  "atomUri": "https://fedi.rrr.sh/users/inquisitiveuprising/statuses/113506321772940061",
  "inReplyToAtomUri": null,
  "conversation": "tag:rrr.sh,2024-11-18:objectId=2584345:objectType=Conversation",
  "content": "<p>im alive</p>",
  "contentMap": {
    "en": "<p>im alive</p>"
  },
  "attachment": [],
  "tag": [],
  "replies": {
    "id": "https://fedi.rrr.sh/users/inquisitiveuprising/statuses/113506321772940061/replies",
    "type": "Collection",
    "first": {
      "type": "CollectionPage",
      "next": "https://fedi.rrr.sh/users/inquisitiveuprising/statuses/113506321772940061/replies?only_other_accounts=true&page=true",
      "partOf": "https://fedi.rrr.sh/users/inquisitiveuprising/statuses/113506321772940061/replies",
      "items": []
    }
  }
}

I can't believe we were beat by mastodon on a feature. Anyway, saw this and decided to give actual representations for reference in the future.

Shit, forgot to remove the ostatus specific attributes. It's safe to ignore "atomUri", "InReplyToAtomUri", and "conversation".

marked this issue as related to #205

marked this issue as related to #249

marked this issue as related to #948 (closed)

added federation label

assigned to @fEmber

mentioned in merge request !918 (merged)

mentioned in commit 9fa3be82

closed with merge request !918 (merged)