use crate::{ activities::{ community::announce::{AnnouncableActivities, AnnounceActivity}, extract_community, following::{follow::FollowCommunity, undo::UndoFollowCommunity}, report::Report, }, context::lemmy_context, generate_moderators_url, generate_outbox_url, http::{ create_apub_response, create_apub_tombstone_response, payload_to_string, receive_activity, }, objects::community::ApubCommunity, }; use activitystreams::{ base::{AnyBase, BaseExt}, collection::{CollectionExt, OrderedCollection, UnorderedCollection}, url::Url, }; use actix_web::{body::Body, web, web::Payload, HttpRequest, HttpResponse}; use lemmy_api_common::blocking; use lemmy_apub_lib::traits::{ActivityFields, ActivityHandler, ToApub}; use lemmy_db_schema::source::{activity::Activity, community::Community}; use lemmy_db_views_actor::{ community_follower_view::CommunityFollowerView, community_moderator_view::CommunityModeratorView, }; 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, context: web::Data, ) -> Result, 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.pool()).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, context: web::Data, ) -> Result { let unparsed = payload_to_string(payload).await?; trace!("Received community inbox activity {}", unparsed); let activity = serde_json::from_str::(&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 { 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, context: web::Data, ) -> Result, 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, context: web::Data, ) -> Result, LemmyError> { let community = blocking(context.pool(), move |conn| { Community::read_from_name(conn, &info.community_name) }) .await??; let community_actor_id = community.actor_id.to_owned(); let activities = blocking(context.pool(), move |conn| { Activity::read_community_outbox(conn, &community_actor_id) }) .await??; let activities = activities .iter() .map(AnyBase::from_arbitrary_json) .collect::, serde_json::Error>>()?; let len = activities.len(); let mut collection = OrderedCollection::new(); collection .set_many_items(activities) .set_many_contexts(lemmy_context()) .set_id(generate_outbox_url(&community.actor_id)?.into()) .set_total_items(len as u64); Ok(create_apub_response(&collection)) } pub(crate) async fn get_apub_community_inbox( info: web::Path, context: web::Data, ) -> Result, LemmyError> { let community = blocking(context.pool(), move |conn| { Community::read_from_name(conn, &info.community_name) }) .await??; let mut collection = OrderedCollection::new(); collection .set_id(community.inbox_url.into()) .set_many_contexts(lemmy_context()); Ok(create_apub_response(&collection)) } pub(crate) async fn get_apub_community_moderators( info: web::Path, context: web::Data, ) -> Result, LemmyError> { let community: ApubCommunity = blocking(context.pool(), move |conn| { Community::read_from_name(conn, &info.community_name) }) .await?? .into(); // The attributed to, is an ordered vector with the creator actor_ids first, // then the rest of the moderators // TODO Technically the instance admins can mod the community, but lets // ignore that for now let cid = community.id; let moderators = blocking(context.pool(), move |conn| { CommunityModeratorView::for_community(conn, cid) }) .await??; let moderators: Vec = moderators .into_iter() .map(|m| m.moderator.actor_id.into()) .collect(); let mut collection = OrderedCollection::new(); collection .set_id(generate_moderators_url(&community.actor_id)?.into()) .set_total_items(moderators.len() as u64) .set_many_items(moderators) .set_many_contexts(lemmy_context()); Ok(create_apub_response(&collection)) }