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