crates/apub/src/http/community.rs

   1 use crate::{
   2   activities::{community::announce::GetCommunity, verify_person_in_community},
   3   activity_lists::GroupInboxActivities,
   4   collections::{
   5     community_moderators::ApubCommunityModerators,
   6     community_outbox::ApubCommunityOutbox,
   7     CommunityContext,
   8   },
   9   context::WithContext,
  10   generate_outbox_url,
  11   http::{
  12     create_apub_response,
  13     create_apub_tombstone_response,
  14     payload_to_string,
  15     receive_activity,
  16     ActivityCommonFields,
  17   },
  18   objects::community::ApubCommunity,
  19   protocol::{
  20     activities::community::announce::AnnounceActivity,
  21     collections::group_followers::GroupFollowers,
  22   },
  23 };
  24 use actix_web::{body::Body, web, web::Payload, HttpRequest, HttpResponse};
  25 use lemmy_api_common::blocking;
  26 use lemmy_apub_lib::{object_id::ObjectId, traits::ApubObject};
  27 use lemmy_db_schema::source::community::Community;
  28 use lemmy_utils::LemmyError;
  29 use lemmy_websocket::LemmyContext;
  30 use log::info;
  31 use serde::Deserialize;
  32
  33 #[derive(Deserialize)]
  34 pub(crate) struct CommunityQuery {
  35   community_name: String,
  36 }
  37
  38 /// Return the ActivityPub json representation of a local community over HTTP.
  39 pub(crate) async fn get_apub_community_http(
  40   info: web::Path<CommunityQuery>,
  41   context: web::Data<LemmyContext>,
  42 ) -> Result<HttpResponse<Body>, LemmyError> {
  43   let community: ApubCommunity = blocking(context.pool(), move |conn| {
  44     Community::read_from_name(conn, &info.community_name)
  45   })
  46   .await??
  47   .into();
  48
  49   if !community.deleted {
  50     let apub = community.into_apub(&**context).await?;
  51
  52     Ok(create_apub_response(&apub))
  53   } else {
  54     Ok(create_apub_tombstone_response(&community.to_tombstone()?))
  55   }
  56 }
  57
  58 /// Handler for all incoming receive to community inboxes.
  59 pub async fn community_inbox(
  60   request: HttpRequest,
  61   payload: Payload,
  62   _path: web::Path<String>,
  63   context: web::Data<LemmyContext>,
  64 ) -> Result<HttpResponse, LemmyError> {
  65   let unparsed = payload_to_string(payload).await?;
  66   info!("Received community inbox activity {}", unparsed);
  67   let activity_data: ActivityCommonFields = serde_json::from_str(&unparsed)?;
  68   let activity = serde_json::from_str::<WithContext<GroupInboxActivities>>(&unparsed)?;
  69
  70   receive_group_inbox(activity.inner(), activity_data, request, &context).await?;
  71
  72   Ok(HttpResponse::Ok().finish())
  73 }
  74
  75 pub(in crate::http) async fn receive_group_inbox(
  76   activity: GroupInboxActivities,
  77   activity_data: ActivityCommonFields,
  78   request: HttpRequest,
  79   context: &LemmyContext,
  80 ) -> Result<HttpResponse, LemmyError> {
  81   let actor_id = ObjectId::new(activity_data.actor.clone());
  82   let res = receive_activity(request, activity.clone(), activity_data, context).await?;
  83
  84   if let GroupInboxActivities::AnnouncableActivities(announcable) = activity {
  85     let community = announcable.get_community(context, &mut 0).await?;
  86     verify_person_in_community(&actor_id, &community, context, &mut 0).await?;
  87     if community.local {
  88       AnnounceActivity::send(*announcable, &community, context).await?;
  89     }
  90   }
  91
  92   Ok(res)
  93 }
  94
  95 /// Returns an empty followers collection, only populating the size (for privacy).
  96 pub(crate) async fn get_apub_community_followers(
  97   info: web::Path<CommunityQuery>,
  98   context: web::Data<LemmyContext>,
  99 ) -> Result<HttpResponse<Body>, LemmyError> {
 100   let community = blocking(context.pool(), move |conn| {
 101     Community::read_from_name(conn, &info.community_name)
 102   })
 103   .await??;
 104   let followers = GroupFollowers::new(community, &context).await?;
 105   Ok(create_apub_response(&followers))
 106 }
 107
 108 /// Returns the community outbox, which is populated by a maximum of 20 posts (but no other
 109 /// activites like votes or comments).
 110 pub(crate) async fn get_apub_community_outbox(
 111   info: web::Path<CommunityQuery>,
 112   context: web::Data<LemmyContext>,
 113 ) -> Result<HttpResponse<Body>, LemmyError> {
 114   let community = blocking(context.pool(), move |conn| {
 115     Community::read_from_name(conn, &info.community_name)
 116   })
 117   .await??;
 118   let id = ObjectId::new(generate_outbox_url(&community.actor_id)?);
 119   let outbox_data = CommunityContext(community.into(), context.get_ref().clone());
 120   let outbox: ApubCommunityOutbox = id.dereference(&outbox_data, &mut 0).await?;
 121   Ok(create_apub_response(&outbox.into_apub(&outbox_data).await?))
 122 }
 123
 124 pub(crate) async fn get_apub_community_moderators(
 125   info: web::Path<CommunityQuery>,
 126   context: web::Data<LemmyContext>,
 127 ) -> Result<HttpResponse<Body>, LemmyError> {
 128   let community: ApubCommunity = blocking(context.pool(), move |conn| {
 129     Community::read_from_name(conn, &info.community_name)
 130   })
 131   .await??
 132   .into();
 133   let id = ObjectId::new(generate_outbox_url(&community.actor_id)?);
 134   let outbox_data = CommunityContext(community, context.get_ref().clone());
 135   let moderators: ApubCommunityModerators = id.dereference(&outbox_data, &mut 0).await?;
 136   Ok(create_apub_response(
 137     &moderators.into_apub(&outbox_data).await?,
 138   ))
 139 }