1 use crate::fetcher::object_id::ObjectId;
4 link::{LinkExt, Mention},
7 use itertools::Itertools;
8 use lemmy_api_common::{blocking, send_local_notifs};
9 use lemmy_apub_lib::{traits::ActorType, 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 utils::{scrape_text_for_mentions, MentionData},
20 use lemmy_websocket::LemmyContext;
24 pub mod create_or_update;
26 async fn get_notif_recipients(
27 actor: &ObjectId<Person>,
29 context: &LemmyContext,
30 request_counter: &mut i32,
31 ) -> Result<Vec<LocalUserId>, LemmyError> {
32 let post_id = comment.post_id;
33 let post = blocking(context.pool(), move |conn| Post::read(conn, post_id)).await??;
34 let actor = actor.dereference(context, request_counter).await?;
37 // Although mentions could be gotten from the post tags (they are included there), or the ccs,
38 // Its much easier to scrape them from the comment body, since the API has to do that
40 // TODO: for compatibility with other projects, it would be much better to read this from cc or tags
41 let mentions = scrape_text_for_mentions(&comment.content);
54 pub struct MentionsAndAddresses {
56 pub inboxes: Vec<Url>,
57 pub tags: Vec<Mention>,
60 /// This takes a comment, and builds a list of to_addresses, inboxes,
61 /// and mention tags, so they know where to be sent to.
62 /// Addresses are the persons / addresses that go in the cc field.
63 pub async fn collect_non_local_mentions(
65 community: &Community,
66 context: &LemmyContext,
67 ) -> Result<MentionsAndAddresses, LemmyError> {
68 let parent_creator = get_comment_parent_creator(context.pool(), comment).await?;
69 let mut addressed_ccs = vec![community.actor_id(), parent_creator.actor_id()];
70 // Note: dont include community inbox here, as we send to it separately with `send_to_community()`
71 let mut inboxes = vec![parent_creator.shared_inbox_or_inbox_url()];
73 // Add the mention tag
74 let mut tags = Vec::new();
76 // Get the person IDs for any mentions
77 let mentions = scrape_text_for_mentions(&comment.content)
79 // Filter only the non-local ones
80 .filter(|m| !m.is_local(&context.settings().hostname))
81 .collect::<Vec<MentionData>>();
83 for mention in &mentions {
84 // TODO should it be fetching it every time?
85 if let Ok(actor_id) = fetch_webfinger_url(mention, context).await {
86 let actor_id: ObjectId<Person> = ObjectId::new(actor_id);
87 debug!("mention actor_id: {}", actor_id);
88 addressed_ccs.push(actor_id.to_owned().to_string().parse()?);
90 let mention_person = actor_id.dereference(context, &mut 0).await?;
91 inboxes.push(mention_person.shared_inbox_or_inbox_url());
93 let mut mention_tag = Mention::new();
95 .set_href(actor_id.into())
96 .set_name(mention.full_name());
97 tags.push(mention_tag);
101 let inboxes = inboxes.into_iter().unique().collect();
103 Ok(MentionsAndAddresses {
110 /// Returns the apub ID of the person this comment is responding to. Meaning, in case this is a
111 /// top-level comment, the creator of the post, otherwise the creator of the parent comment.
112 async fn get_comment_parent_creator(
115 ) -> Result<Person, LemmyError> {
116 let parent_creator_id = if let Some(parent_comment_id) = comment.parent_id {
118 blocking(pool, move |conn| Comment::read(conn, parent_comment_id)).await??;
119 parent_comment.creator_id
121 let parent_post_id = comment.post_id;
122 let parent_post = blocking(pool, move |conn| Post::read(conn, parent_post_id)).await??;
123 parent_post.creator_id
125 Ok(blocking(pool, move |conn| Person::read(conn, parent_creator_id)).await??)
128 /// Turns a person id like `@name@example.com` into an apub ID, like `https://example.com/user/name`,
130 async fn fetch_webfinger_url(
131 mention: &MentionData,
132 context: &LemmyContext,
133 ) -> Result<Url, LemmyError> {
134 let fetch_url = format!(
135 "{}://{}/.well-known/webfinger?resource=acct:{}@{}",
136 context.settings().get_protocol_string(),
141 debug!("Fetching webfinger url: {}", &fetch_url);
143 let response = retry(|| context.client().get(&fetch_url).send()).await?;
145 let res: WebfingerResponse = response
148 .map_err(|e| RecvError(e.to_string()))?;
153 .find(|l| l.type_.eq(&Some("application/activity+json".to_string())))
154 .ok_or_else(|| anyhow!("No application/activity+json link found."))?;
158 .ok_or_else(|| anyhow!("No href found.").into())