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

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use crate::{
activities::send_lemmy_activity,
activity_lists::AnnouncableActivities,
local_instance,
objects::{community::ApubCommunity, person::ApubPerson},
protocol::activities::community::announce::AnnounceActivity,
};
use activitypub_federation::{core::object_id::ObjectId, traits::Actor};
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use lemmy_api_common::LemmyContext;
use lemmy_db_schema::source::person::PersonFollower;
use lemmy_utils::error::LemmyError;
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use url::Url;
pub mod add_mod;
pub mod announce;
pub mod remove_mod;
pub mod report;
pub mod update;
/// This function sends all activities which are happening in a community to the right inboxes.
/// For example Create/Page, Add/Mod etc, but not private messages.
///
/// Activities are sent to the community itself if it lives on another instance. If the community
/// is local, the activity is directly wrapped into Announce and sent to community followers.
/// Activities are also sent to those who follow the actor (with exception of moderation activities).
///
/// * `activity` - The activity which is being sent
/// * `actor` - The user who is sending the activity
/// * `community` - Community inside which the activity is sent
/// * `inboxes` - Any additional inboxes the activity should be sent to (for example,
/// to the user who is being promoted to moderator)
/// * `is_mod_activity` - True for things like Add/Mod, these are not sent to user followers
pub(crate) async fn send_activity_in_community(
activity: AnnouncableActivities,
actor: &ApubPerson,
community: &ApubCommunity,
extra_inboxes: Vec<Url>,
is_mod_action: bool,
context: &LemmyContext,
) -> Result<(), LemmyError> {
// send to extra_inboxes
send_lemmy_activity(context, activity.clone(), actor, extra_inboxes, false).await?;
if community.local {
// send directly to community followers
AnnounceActivity::send(activity.clone().try_into()?, community, context).await?;
} else {
// send to the community, which will then forward to followers
let inbox = vec![community.shared_inbox_or_inbox()];
send_lemmy_activity(context, activity.clone(), actor, inbox, false).await?;
}
// send to those who follow `actor`
if !is_mod_action {
let inboxes = PersonFollower::list_followers(context.pool(), actor.id)
.await?
.into_iter()
.map(|p| ApubPerson(p).shared_inbox_or_inbox())
.collect();
send_lemmy_activity(context, activity, actor, inboxes, false).await?;
}
Ok(())
}
#[tracing::instrument(skip_all)]
pub(crate) async fn get_community_from_moderators_url(
moderators: &Url,
context: &LemmyContext,
request_counter: &mut i32,
) -> Result<ApubCommunity, LemmyError> {
let community_id = Url::parse(&moderators.to_string().replace("/moderators", ""))?;
ObjectId::new(community_id)
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.dereference(context, local_instance(context).await, request_counter)
.await
}