crates/apub/src/activities/community/mod.rs

   1 use crate::{
   2   activities::send_lemmy_activity,
   3   activity_lists::AnnouncableActivities,
   4   local_instance,
   5   objects::{community::ApubCommunity, person::ApubPerson},
   6   protocol::activities::community::announce::AnnounceActivity,
   7 };
   8 use activitypub_federation::{core::object_id::ObjectId, traits::Actor};
   9 use lemmy_db_schema::source::person::PersonFollower;
  10 use lemmy_utils::error::LemmyError;
  11 use lemmy_websocket::LemmyContext;
  12 use url::Url;
  13
  14 pub mod add_mod;
  15 pub mod announce;
  16 pub mod remove_mod;
  17 pub mod report;
  18 pub mod update;
  19
  20 /// This function sends all activities which are happening in a community to the right inboxes.
  21 /// For example Create/Page, Add/Mod etc, but not private messages.
  22 ///
  23 /// Activities are sent to the community itself if it lives on another instance. If the community
  24 /// is local, the activity is directly wrapped into Announce and sent to community followers.
  25 /// Activities are also sent to those who follow the actor (with exception of moderation activities).
  26 ///
  27 /// * `activity` - The activity which is being sent
  28 /// * `actor` - The user who is sending the activity
  29 /// * `community` - Community inside which the activity is sent
  30 /// * `inboxes` - Any additional inboxes the activity should be sent to (for example,
  31 ///               to the user who is being promoted to moderator)
  32 /// * `is_mod_activity` - True for things like Add/Mod, these are not sent to user followers
  33 pub(crate) async fn send_activity_in_community(
  34   activity: AnnouncableActivities,
  35   actor: &ApubPerson,
  36   community: &ApubCommunity,
  37   extra_inboxes: Vec<Url>,
  38   is_mod_action: bool,
  39   context: &LemmyContext,
  40 ) -> Result<(), LemmyError> {
  41   // send to extra_inboxes
  42   send_lemmy_activity(context, activity.clone(), actor, extra_inboxes, false).await?;
  43
  44   if community.local {
  45     // send directly to community followers
  46     AnnounceActivity::send(activity.clone().try_into()?, community, context).await?;
  47   } else {
  48     // send to the community, which will then forward to followers
  49     let inbox = vec![community.shared_inbox_or_inbox()];
  50     send_lemmy_activity(context, activity.clone(), actor, inbox, false).await?;
  51   }
  52
  53   // send to those who follow `actor`
  54   if !is_mod_action {
  55     let inboxes = PersonFollower::list_followers(context.pool(), actor.id)
  56       .await?
  57       .into_iter()
  58       .map(|p| ApubPerson(p).shared_inbox_or_inbox())
  59       .collect();
  60     send_lemmy_activity(context, activity, actor, inboxes, false).await?;
  61   }
  62
  63   Ok(())
  64 }
  65
  66 #[tracing::instrument(skip_all)]
  67 async fn get_community_from_moderators_url(
  68   moderators: &Url,
  69   context: &LemmyContext,
  70   request_counter: &mut i32,
  71 ) -> Result<ApubCommunity, LemmyError> {
  72   let community_id = Url::parse(&moderators.to_string().replace("/moderators", ""))?;
  73   ObjectId::new(community_id)
  74     .dereference(context, local_instance(context).await, request_counter)
  75     .await
  76 }