lemmy/crates/apub/src/http/community.rs
Nutomic 61189efe72
Rewrite collections to use new fetcher (#1861)
* Merge traits ToApub and FromApub into ApubObject

* Rewrite community outbox to use new fetcher

* Rewrite community moderators collection

* Rewrite tombstone
2021-10-27 12:03:07 -04:00

158 lines
5.2 KiB
Rust

use crate::{
activities::{
community::announce::{AnnouncableActivities, AnnounceActivity},
extract_community,
following::{follow::FollowCommunity, undo::UndoFollowCommunity},
report::Report,
},
collections::{
community_moderators::ApubCommunityModerators,
community_outbox::ApubCommunityOutbox,
CommunityContext,
},
context::lemmy_context,
fetcher::object_id::ObjectId,
generate_outbox_url,
http::{
create_apub_response,
create_apub_tombstone_response,
payload_to_string,
receive_activity,
},
objects::community::ApubCommunity,
};
use activitystreams::{
base::BaseExt,
collection::{CollectionExt, UnorderedCollection},
};
use actix_web::{body::Body, web, web::Payload, HttpRequest, HttpResponse};
use lemmy_api_common::blocking;
use lemmy_apub_lib::traits::{ActivityFields, ActivityHandler, ApubObject};
use lemmy_db_schema::source::community::Community;
use lemmy_db_views_actor::community_follower_view::CommunityFollowerView;
use lemmy_utils::LemmyError;
use lemmy_websocket::LemmyContext;
use log::trace;
use serde::{Deserialize, Serialize};
#[derive(Deserialize)]
pub(crate) struct CommunityQuery {
community_name: String,
}
/// Return the ActivityPub json representation of a local community over HTTP.
pub(crate) async fn get_apub_community_http(
info: web::Path<CommunityQuery>,
context: web::Data<LemmyContext>,
) -> Result<HttpResponse<Body>, 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.to_apub(&**context).await?;
Ok(create_apub_response(&apub))
} else {
Ok(create_apub_tombstone_response(&community.to_tombstone()?))
}
}
#[derive(Clone, Debug, Deserialize, Serialize, ActivityHandler, ActivityFields)]
#[serde(untagged)]
#[activity_handler(LemmyContext)]
pub enum GroupInboxActivities {
FollowCommunity(FollowCommunity),
UndoFollowCommunity(UndoFollowCommunity),
AnnouncableActivities(AnnouncableActivities),
Report(Report),
}
/// Handler for all incoming receive to community inboxes.
pub async fn community_inbox(
request: HttpRequest,
payload: Payload,
_path: web::Path<String>,
context: web::Data<LemmyContext>,
) -> Result<HttpResponse, LemmyError> {
let unparsed = payload_to_string(payload).await?;
trace!("Received community inbox activity {}", unparsed);
let activity = serde_json::from_str::<GroupInboxActivities>(&unparsed)?;
receive_group_inbox(activity.clone(), request, &context).await?;
if let GroupInboxActivities::AnnouncableActivities(announcable) = activity {
let community = extract_community(&announcable.cc(), &context, &mut 0).await?;
if community.local {
AnnounceActivity::send(announcable, &community, vec![], &context).await?;
}
}
Ok(HttpResponse::Ok().finish())
}
pub(in crate::http) async fn receive_group_inbox(
activity: GroupInboxActivities,
request: HttpRequest,
context: &LemmyContext,
) -> Result<HttpResponse, LemmyError> {
receive_activity(request, activity.clone(), 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>,
) -> Result<HttpResponse<Body>, LemmyError> {
let community = blocking(context.pool(), move |conn| {
Community::read_from_name(conn, &info.community_name)
})
.await??;
let community_id = community.id;
let community_followers = blocking(context.pool(), move |conn| {
CommunityFollowerView::for_community(conn, community_id)
})
.await??;
let mut collection = UnorderedCollection::new();
collection
.set_many_contexts(lemmy_context())
.set_id(community.followers_url.into())
.set_total_items(community_followers.len() as u64);
Ok(create_apub_response(&collection))
}
/// 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>,
) -> Result<HttpResponse<Body>, LemmyError> {
let community = blocking(context.pool(), move |conn| {
Community::read_from_name(conn, &info.community_name)
})
.await??;
let id = ObjectId::new(generate_outbox_url(&community.actor_id)?.into_inner());
let outbox_data = CommunityContext(community.into(), context.get_ref().clone());
let outbox: ApubCommunityOutbox = id.dereference(&outbox_data, &mut 0).await?;
Ok(create_apub_response(&outbox.to_apub(&outbox_data).await?))
}
pub(crate) async fn get_apub_community_moderators(
info: web::Path<CommunityQuery>,
context: web::Data<LemmyContext>,
) -> Result<HttpResponse<Body>, LemmyError> {
let community: ApubCommunity = blocking(context.pool(), move |conn| {
Community::read_from_name(conn, &info.community_name)
})
.await??
.into();
let id = ObjectId::new(generate_outbox_url(&community.actor_id)?.into_inner());
let outbox_data = CommunityContext(community, context.get_ref().clone());
let moderators: ApubCommunityModerators = id.dereference(&outbox_data, &mut 0).await?;
Ok(create_apub_response(
&moderators.to_apub(&outbox_data).await?,
))
}