1 use crate::objects::{comment::ApubComment, community::ApubCommunity, person::ApubPerson};
2 use activitypub_federation::{
4 fetch::{object_id::ObjectId, webfinger::webfinger_resolve_actor},
5 kinds::link::MentionType,
8 use lemmy_api_common::context::LemmyContext;
10 source::{comment::Comment, person::Person, post::Post},
16 utils::mention::{scrape_text_for_mentions, MentionData},
18 use serde::{Deserialize, Serialize};
19 use serde_json::Value;
22 #[derive(Clone, Debug, Deserialize, Serialize)]
24 pub enum MentionOrValue {
29 #[derive(Clone, Debug, Deserialize, Serialize)]
33 #[serde(rename = "type")]
34 pub kind: MentionType,
37 pub struct MentionsAndAddresses {
39 pub tags: Vec<MentionOrValue>,
42 /// This takes a comment, and builds a list of to_addresses, inboxes,
43 /// and mention tags, so they know where to be sent to.
44 /// Addresses are the persons / addresses that go in the cc field.
45 #[tracing::instrument(skip(comment, community_id, context))]
46 pub async fn collect_non_local_mentions(
47 comment: &ApubComment,
48 community_id: ObjectId<ApubCommunity>,
49 context: &Data<LemmyContext>,
50 ) -> Result<MentionsAndAddresses, LemmyError> {
51 let parent_creator = get_comment_parent_creator(context.pool(), comment).await?;
52 let mut addressed_ccs: Vec<Url> = vec![community_id.into(), parent_creator.id()];
54 // Add the mention tag
55 let parent_creator_tag = Mention {
56 href: parent_creator.actor_id.clone().into(),
60 &parent_creator.id().domain().expect("has domain")
62 kind: MentionType::Mention,
64 let mut tags = vec![parent_creator_tag];
66 // Get the person IDs for any mentions
67 let mentions = scrape_text_for_mentions(&comment.content)
69 // Filter only the non-local ones
70 .filter(|m| !m.is_local(&context.settings().hostname))
71 .collect::<Vec<MentionData>>();
73 for mention in &mentions {
74 let identifier = format!("{}@{}", mention.name, mention.domain);
75 let person = webfinger_resolve_actor::<LemmyContext, ApubPerson>(&identifier, context).await;
76 if let Ok(person) = person {
77 addressed_ccs.push(person.actor_id.to_string().parse()?);
79 let mention_tag = Mention {
81 name: Some(mention.full_name()),
82 kind: MentionType::Mention,
84 tags.push(mention_tag);
88 let tags = tags.into_iter().map(MentionOrValue::Mention).collect();
89 Ok(MentionsAndAddresses {
95 /// Returns the apub ID of the person this comment is responding to. Meaning, in case this is a
96 /// top-level comment, the creator of the post, otherwise the creator of the parent comment.
97 #[tracing::instrument(skip(pool, comment))]
98 async fn get_comment_parent_creator(
101 ) -> Result<ApubPerson, LemmyError> {
102 let parent_creator_id = if let Some(parent_comment_id) = comment.parent_comment_id() {
103 let parent_comment = Comment::read(pool, parent_comment_id).await?;
104 parent_comment.creator_id
106 let parent_post_id = comment.post_id;
107 let parent_post = Post::read(pool, parent_post_id).await?;
108 parent_post.creator_id
110 Ok(Person::read(pool, parent_creator_id).await?.into())