lemmy/crates/apub/src/http/community.rs

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use crate::{
activity_lists::GroupInboxActivities,
collections::{
community_moderators::ApubCommunityModerators,
community_outbox::ApubCommunityOutbox,
CommunityContext,
},
generate_outbox_url,
http::{create_apub_response, create_apub_tombstone_response, receive_lemmy_activity},
local_instance,
objects::{community::ApubCommunity, person::ApubPerson},
protocol::collections::group_followers::GroupFollowers,
};
use activitypub_federation::{
core::object_id::ObjectId,
deser::context::WithContext,
traits::ApubObject,
};
use actix_web::{web, HttpRequest, HttpResponse};
use lemmy_api_common::utils::blocking;
use lemmy_db_schema::{source::community::Community, traits::ApubActor};
use lemmy_utils::error::LemmyError;
use lemmy_websocket::LemmyContext;
use serde::Deserialize;
#[derive(Deserialize)]
pub(crate) struct CommunityQuery {
community_name: String,
}
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/// Return the ActivityPub json representation of a local community over HTTP.
#[tracing::instrument(skip_all)]
pub(crate) async fn get_apub_community_http(
info: web::Path<CommunityQuery>,
context: web::Data<LemmyContext>,
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) -> Result<HttpResponse, LemmyError> {
let community: ApubCommunity = blocking(context.pool(), move |conn| {
Community::read_from_name(conn, &info.community_name)
})
.await??
.into();
if !community.deleted {
let apub = community.into_apub(&**context).await?;
Ok(create_apub_response(&apub))
} else {
Ok(create_apub_tombstone_response(community.actor_id.clone()))
}
}
/// Handler for all incoming receive to community inboxes.
#[tracing::instrument(skip_all)]
pub async fn community_inbox(
request: HttpRequest,
payload: String,
context: web::Data<LemmyContext>,
) -> Result<HttpResponse, LemmyError> {
receive_lemmy_activity::<WithContext<GroupInboxActivities>, ApubPerson>(request, payload, context)
.await
}
/// Returns an empty followers collection, only populating the size (for privacy).
pub(crate) async fn get_apub_community_followers(
info: web::Path<CommunityQuery>,
context: web::Data<LemmyContext>,
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) -> Result<HttpResponse, LemmyError> {
let community = blocking(context.pool(), move |conn| {
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Community::read_from_name(conn, &info.community_name)
})
.await??;
let followers = GroupFollowers::new(community, &context).await?;
Ok(create_apub_response(&followers))
}
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/// Returns the community outbox, which is populated by a maximum of 20 posts (but no other
/// activites like votes or comments).
pub(crate) async fn get_apub_community_outbox(
info: web::Path<CommunityQuery>,
context: web::Data<LemmyContext>,
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) -> Result<HttpResponse, LemmyError> {
let community = blocking(context.pool(), move |conn| {
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Community::read_from_name(conn, &info.community_name)
})
.await??;
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let id = ObjectId::new(generate_outbox_url(&community.actor_id)?);
let outbox_data = CommunityContext(community.into(), context.get_ref().clone());
let outbox: ApubCommunityOutbox = id
.dereference::<LemmyError>(&outbox_data, local_instance(&context), &mut 0)
.await?;
Ok(create_apub_response(&outbox.into_apub(&outbox_data).await?))
}
#[tracing::instrument(skip_all)]
pub(crate) async fn get_apub_community_moderators(
info: web::Path<CommunityQuery>,
context: web::Data<LemmyContext>,
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) -> Result<HttpResponse, LemmyError> {
let community: ApubCommunity = blocking(context.pool(), move |conn| {
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Community::read_from_name(conn, &info.community_name)
})
.await??
.into();
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let id = ObjectId::new(generate_outbox_url(&community.actor_id)?);
let outbox_data = CommunityContext(community, context.get_ref().clone());
let moderators: ApubCommunityModerators = id
.dereference::<LemmyError>(&outbox_data, local_instance(&context), &mut 0)
.await?;
Ok(create_apub_response(
&moderators.into_apub(&outbox_data).await?,
))
}