crates/apub/src/activities/following/undo_follow.rs

   1 use crate::{
   2   activities::{generate_activity_id, send_lemmy_activity, verify_activity, verify_person},
   3   objects::{community::ApubCommunity, person::ApubPerson},
   4   protocol::activities::following::{follow::FollowCommunity, undo_follow::UndoFollowCommunity},
   5 };
   6 use activitystreams::activity::kind::UndoType;
   7 use lemmy_api_common::blocking;
   8 use lemmy_apub_lib::{
   9   data::Data,
  10   object_id::ObjectId,
  11   traits::{ActivityHandler, ActorType},
  12   verify::verify_urls_match,
  13 };
  14 use lemmy_db_schema::{
  15   source::community::{CommunityFollower, CommunityFollowerForm},
  16   traits::Followable,
  17 };
  18 use lemmy_utils::LemmyError;
  19 use lemmy_websocket::LemmyContext;
  20
  21 impl UndoFollowCommunity {
  22   pub async fn send(
  23     actor: &ApubPerson,
  24     community: &ApubCommunity,
  25     context: &LemmyContext,
  26   ) -> Result<(), LemmyError> {
  27     let object = FollowCommunity::new(actor, community, context)?;
  28     let undo = UndoFollowCommunity {
  29       actor: ObjectId::new(actor.actor_id()),
  30       to: [ObjectId::new(community.actor_id())],
  31       object,
  32       kind: UndoType::Undo,
  33       id: generate_activity_id(
  34         UndoType::Undo,
  35         &context.settings().get_protocol_and_hostname(),
  36       )?,
  37       unparsed: Default::default(),
  38     };
  39     let inbox = vec![community.shared_inbox_or_inbox_url()];
  40     send_lemmy_activity(context, &undo, &undo.id, actor, inbox, true).await
  41   }
  42 }
  43
  44 #[async_trait::async_trait(?Send)]
  45 impl ActivityHandler for UndoFollowCommunity {
  46   type DataType = LemmyContext;
  47   async fn verify(
  48     &self,
  49     context: &Data<LemmyContext>,
  50     request_counter: &mut i32,
  51   ) -> Result<(), LemmyError> {
  52     verify_activity(&self.id, self.actor.inner(), &context.settings())?;
  53     verify_urls_match(self.to[0].inner(), self.object.object.inner())?;
  54     verify_urls_match(self.actor.inner(), self.object.actor.inner())?;
  55     verify_person(&self.actor, context, request_counter).await?;
  56     self.object.verify(context, request_counter).await?;
  57     Ok(())
  58   }
  59
  60   async fn receive(
  61     self,
  62     context: &Data<LemmyContext>,
  63     request_counter: &mut i32,
  64   ) -> Result<(), LemmyError> {
  65     let actor = self.actor.dereference(context, request_counter).await?;
  66     let community = self.to[0].dereference(context, request_counter).await?;
  67
  68     let community_follower_form = CommunityFollowerForm {
  69       community_id: community.id,
  70       person_id: actor.id,
  71       pending: false,
  72     };
  73
  74     // This will fail if they aren't a follower, but ignore the error.
  75     blocking(context.pool(), move |conn| {
  76       CommunityFollower::unfollow(conn, &community_follower_form).ok()
  77     })
  78     .await?;
  79     Ok(())
  80   }
  81 }