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_schema::{
11 newtypes::LocalUserId,
12 source::{comment::Comment, community::Community, person::Person, post::Post},
17 request::{retry, RecvError},
18 utils::{scrape_text_for_mentions, MentionData},
21 use lemmy_websocket::LemmyContext;
25 pub mod create_or_update;
27 async fn get_notif_recipients(
28 actor: &ObjectId<Person>,
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 = actor.dereference(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);
55 pub struct MentionsAndAddresses {
57 pub inboxes: Vec<Url>,
58 pub tags: Vec<Mention>,
61 /// This takes a comment, and builds a list of to_addresses, inboxes,
62 /// and mention tags, so they know where to be sent to.
63 /// Addresses are the persons / addresses that go in the cc field.
64 pub async fn collect_non_local_mentions(
66 community: &Community,
67 context: &LemmyContext,
68 ) -> Result<MentionsAndAddresses, LemmyError> {
69 let parent_creator = get_comment_parent_creator(context.pool(), comment).await?;
70 let mut addressed_ccs = vec![community.actor_id(), parent_creator.actor_id()];
71 // Note: dont include community inbox here, as we send to it separately with `send_to_community()`
72 let mut inboxes = vec![parent_creator.shared_inbox_or_inbox_url()];
74 // Add the mention tag
75 let mut tags = Vec::new();
77 // Get the person IDs for any mentions
78 let mentions = scrape_text_for_mentions(&comment.content)
80 // Filter only the non-local ones
81 .filter(|m| !m.is_local(&context.settings().hostname))
82 .collect::<Vec<MentionData>>();
84 for mention in &mentions {
85 // TODO should it be fetching it every time?
86 if let Ok(actor_id) = fetch_webfinger_url(mention, context).await {
87 let actor_id: ObjectId<Person> = ObjectId::new(actor_id);
88 debug!("mention actor_id: {}", actor_id);
89 addressed_ccs.push(actor_id.to_owned().to_string().parse()?);
91 let mention_person = actor_id.dereference(context, &mut 0).await?;
92 inboxes.push(mention_person.shared_inbox_or_inbox_url());
94 let mut mention_tag = Mention::new();
96 .set_href(actor_id.into())
97 .set_name(mention.full_name());
98 tags.push(mention_tag);
102 let inboxes = inboxes.into_iter().unique().collect();
104 Ok(MentionsAndAddresses {
111 /// Returns the apub ID of the person this comment is responding to. Meaning, in case this is a
112 /// top-level comment, the creator of the post, otherwise the creator of the parent comment.
113 async fn get_comment_parent_creator(
116 ) -> Result<Person, LemmyError> {
117 let parent_creator_id = if let Some(parent_comment_id) = comment.parent_id {
119 blocking(pool, move |conn| Comment::read(conn, parent_comment_id)).await??;
120 parent_comment.creator_id
122 let parent_post_id = comment.post_id;
123 let parent_post = blocking(pool, move |conn| Post::read(conn, parent_post_id)).await??;
124 parent_post.creator_id
126 Ok(blocking(pool, move |conn| Person::read(conn, parent_creator_id)).await??)
129 /// Turns a person id like `@name@example.com` into an apub ID, like `https://example.com/user/name`,
131 async fn fetch_webfinger_url(
132 mention: &MentionData,
133 context: &LemmyContext,
134 ) -> Result<Url, LemmyError> {
135 let fetch_url = format!(
136 "{}://{}/.well-known/webfinger?resource=acct:{}@{}",
137 context.settings().get_protocol_string(),
142 debug!("Fetching webfinger url: {}", &fetch_url);
144 let response = retry(|| context.client().get(&fetch_url).send()).await?;
146 let res: WebfingerResponse = response
149 .map_err(|e| RecvError(e.to_string()))?;
154 .find(|l| l.type_.eq(&Some("application/activity+json".to_string())))
155 .ok_or_else(|| anyhow!("No application/activity+json link found."))?;
159 .ok_or_else(|| anyhow!("No href found.").into())