1 use crate::{fetcher::person::get_or_fetch_and_upsert_person, ActorType};
4 link::{LinkExt, Mention},
7 use itertools::Itertools;
8 use lemmy_api_common::{blocking, send_local_notifs, WebFingerResponse};
9 use lemmy_db_queries::{Crud, DbPool};
10 use lemmy_db_schema::{
11 source::{comment::Comment, community::Community, person::Person, post::Post},
15 request::{retry, RecvError},
16 settings::structs::Settings,
17 utils::{scrape_text_for_mentions, MentionData},
20 use lemmy_websocket::LemmyContext;
25 pub mod create_or_update;
27 async fn get_notif_recipients(
30 context: &LemmyContext,
31 request_counter: &mut i32,
32 ) -> Result<Vec<LocalUserId>, LemmyError> {
33 let post_id = comment.post_id;
34 let post = blocking(context.pool(), move |conn| Post::read(conn, post_id)).await??;
35 let actor = get_or_fetch_and_upsert_person(actor, context, request_counter).await?;
38 // Although mentions could be gotten from the post tags (they are included there), or the ccs,
39 // Its much easier to scrape them from the comment body, since the API has to do that
41 // TODO: for compatibility with other projects, it would be much better to read this from cc or tags
42 let mentions = scrape_text_for_mentions(&comment.content);
43 send_local_notifs(mentions, comment.clone(), actor, post, context.pool(), true).await
46 pub struct MentionsAndAddresses {
48 pub inboxes: Vec<Url>,
49 pub tags: Vec<Mention>,
52 /// This takes a comment, and builds a list of to_addresses, inboxes,
53 /// and mention tags, so they know where to be sent to.
54 /// Addresses are the persons / addresses that go in the cc field.
55 pub async fn collect_non_local_mentions(
57 community: &Community,
58 context: &LemmyContext,
59 ) -> Result<MentionsAndAddresses, LemmyError> {
60 let parent_creator = get_comment_parent_creator(context.pool(), comment).await?;
61 let mut addressed_ccs = vec![community.actor_id(), parent_creator.actor_id()];
62 // Note: dont include community inbox here, as we send to it separately with `send_to_community()`
63 let mut inboxes = vec![parent_creator.get_shared_inbox_or_inbox_url()];
65 // Add the mention tag
66 let mut tags = Vec::new();
68 // Get the person IDs for any mentions
69 let mentions = scrape_text_for_mentions(&comment.content)
71 // Filter only the non-local ones
72 .filter(|m| !m.is_local())
73 .collect::<Vec<MentionData>>();
75 for mention in &mentions {
76 // TODO should it be fetching it every time?
77 if let Ok(actor_id) = fetch_webfinger_url(mention, context.client()).await {
78 debug!("mention actor_id: {}", actor_id);
79 addressed_ccs.push(actor_id.to_owned().to_string().parse()?);
81 let mention_person = get_or_fetch_and_upsert_person(&actor_id, context, &mut 0).await?;
82 inboxes.push(mention_person.get_shared_inbox_or_inbox_url());
84 let mut mention_tag = Mention::new();
85 mention_tag.set_href(actor_id).set_name(mention.full_name());
86 tags.push(mention_tag);
90 let inboxes = inboxes.into_iter().unique().collect();
92 Ok(MentionsAndAddresses {
99 /// Returns the apub ID of the person this comment is responding to. Meaning, in case this is a
100 /// top-level comment, the creator of the post, otherwise the creator of the parent comment.
101 async fn get_comment_parent_creator(
104 ) -> Result<Person, LemmyError> {
105 let parent_creator_id = if let Some(parent_comment_id) = comment.parent_id {
107 blocking(pool, move |conn| Comment::read(conn, parent_comment_id)).await??;
108 parent_comment.creator_id
110 let parent_post_id = comment.post_id;
111 let parent_post = blocking(pool, move |conn| Post::read(conn, parent_post_id)).await??;
112 parent_post.creator_id
114 Ok(blocking(pool, move |conn| Person::read(conn, parent_creator_id)).await??)
117 /// Turns a person id like `@name@example.com` into an apub ID, like `https://example.com/user/name`,
119 async fn fetch_webfinger_url(mention: &MentionData, client: &Client) -> Result<Url, LemmyError> {
120 let fetch_url = format!(
121 "{}://{}/.well-known/webfinger?resource=acct:{}@{}",
122 Settings::get().get_protocol_string(),
127 debug!("Fetching webfinger url: {}", &fetch_url);
129 let response = retry(|| client.get(&fetch_url).send()).await?;
131 let res: WebFingerResponse = response
134 .map_err(|e| RecvError(e.to_string()))?;
139 .find(|l| l.type_.eq(&Some("application/activity+json".to_string())))
140 .ok_or_else(|| anyhow!("No application/activity+json link found."))?;
144 .ok_or_else(|| anyhow!("No href found.").into())