crates/apub/src/http/community.rs

   1 use crate::{
   2   extensions::context::lemmy_context,
   3   http::{create_apub_response, create_apub_tombstone_response},
   4   objects::ToApub,
   5   ActorType,
   6 };
   7 use activitystreams::{
   8   base::{AnyBase, BaseExt},
   9   collection::{CollectionExt, OrderedCollection, UnorderedCollection},
  10 };
  11 use actix_web::{body::Body, web, HttpResponse};
  12 use lemmy_api_structs::blocking;
  13 use lemmy_db_queries::source::{activity::Activity_, community::Community_};
  14 use lemmy_db_schema::source::{activity::Activity, community::Community};
  15 use lemmy_db_views_actor::community_follower_view::CommunityFollowerView;
  16 use lemmy_utils::LemmyError;
  17 use lemmy_websocket::LemmyContext;
  18 use serde::Deserialize;
  19
  20 #[derive(Deserialize)]
  21 pub struct CommunityQuery {
  22   community_name: String,
  23 }
  24
  25 /// Return the ActivityPub json representation of a local community over HTTP.
  26 pub async fn get_apub_community_http(
  27   info: web::Path<CommunityQuery>,
  28   context: web::Data<LemmyContext>,
  29 ) -> Result<HttpResponse<Body>, LemmyError> {
  30   let community = blocking(context.pool(), move |conn| {
  31     Community::read_from_name(conn, &info.community_name)
  32   })
  33   .await??;
  34
  35   if !community.deleted {
  36     let apub = community.to_apub(context.pool()).await?;
  37
  38     Ok(create_apub_response(&apub))
  39   } else {
  40     Ok(create_apub_tombstone_response(&community.to_tombstone()?))
  41   }
  42 }
  43
  44 /// Returns an empty followers collection, only populating the size (for privacy).
  45 pub async fn get_apub_community_followers(
  46   info: web::Path<CommunityQuery>,
  47   context: web::Data<LemmyContext>,
  48 ) -> Result<HttpResponse<Body>, LemmyError> {
  49   let community = blocking(context.pool(), move |conn| {
  50     Community::read_from_name(&conn, &info.community_name)
  51   })
  52   .await??;
  53
  54   let community_id = community.id;
  55   let community_followers = blocking(context.pool(), move |conn| {
  56     CommunityFollowerView::for_community(&conn, community_id)
  57   })
  58   .await??;
  59
  60   let mut collection = UnorderedCollection::new();
  61   collection
  62     .set_many_contexts(lemmy_context()?)
  63     .set_id(community.followers_url.into())
  64     .set_total_items(community_followers.len() as u64);
  65   Ok(create_apub_response(&collection))
  66 }
  67
  68 /// Returns the community outbox, which is populated by a maximum of 20 posts (but no other
  69 /// activites like votes or comments).
  70 pub async fn get_apub_community_outbox(
  71   info: web::Path<CommunityQuery>,
  72   context: web::Data<LemmyContext>,
  73 ) -> Result<HttpResponse<Body>, LemmyError> {
  74   let community = blocking(context.pool(), move |conn| {
  75     Community::read_from_name(&conn, &info.community_name)
  76   })
  77   .await??;
  78
  79   let community_actor_id = community.actor_id.to_owned();
  80   let activities = blocking(context.pool(), move |conn| {
  81     Activity::read_community_outbox(conn, &community_actor_id)
  82   })
  83   .await??;
  84
  85   let activities = activities
  86     .iter()
  87     .map(AnyBase::from_arbitrary_json)
  88     .collect::<Result<Vec<AnyBase>, serde_json::Error>>()?;
  89   let len = activities.len();
  90   let mut collection = OrderedCollection::new();
  91   collection
  92     .set_many_items(activities)
  93     .set_many_contexts(lemmy_context()?)
  94     .set_id(community.get_outbox_url()?)
  95     .set_total_items(len as u64);
  96   Ok(create_apub_response(&collection))
  97 }
  98
  99 pub async fn get_apub_community_inbox(
 100   info: web::Path<CommunityQuery>,
 101   context: web::Data<LemmyContext>,
 102 ) -> Result<HttpResponse<Body>, LemmyError> {
 103   let community = blocking(context.pool(), move |conn| {
 104     Community::read_from_name(&conn, &info.community_name)
 105   })
 106   .await??;
 107
 108   let mut collection = OrderedCollection::new();
 109   collection
 110     .set_id(format!("{}/inbox", community.actor_id).parse()?)
 111     .set_many_contexts(lemmy_context()?);
 112   Ok(create_apub_response(&collection))
 113 }