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

   1 use crate::{
   2   activities::{generate_activity_id, send_lemmy_activity, verify_person},
   3   local_instance,
   4   objects::{community::ApubCommunity, person::ApubPerson},
   5   protocol::activities::following::{follow::FollowCommunity, undo_follow::UndoFollowCommunity},
   6   ActorType,
   7 };
   8 use activitypub_federation::{
   9   core::object_id::ObjectId,
  10   data::Data,
  11   traits::{ActivityHandler, Actor},
  12   utils::verify_urls_match,
  13 };
  14 use activitystreams_kinds::activity::UndoType;
  15 use lemmy_db_schema::{
  16   source::community::{CommunityFollower, CommunityFollowerForm},
  17   traits::Followable,
  18 };
  19 use lemmy_utils::error::LemmyError;
  20 use lemmy_websocket::LemmyContext;
  21 use url::Url;
  22
  23 impl UndoFollowCommunity {
  24   #[tracing::instrument(skip_all)]
  25   pub async fn send(
  26     actor: &ApubPerson,
  27     community: &ApubCommunity,
  28     context: &LemmyContext,
  29   ) -> Result<(), LemmyError> {
  30     let object = FollowCommunity::new(actor, community, context)?;
  31     let undo = UndoFollowCommunity {
  32       actor: ObjectId::new(actor.actor_id()),
  33       object,
  34       kind: UndoType::Undo,
  35       id: generate_activity_id(
  36         UndoType::Undo,
  37         &context.settings().get_protocol_and_hostname(),
  38       )?,
  39       unparsed: Default::default(),
  40     };
  41     let inbox = vec![community.shared_inbox_or_inbox()];
  42     send_lemmy_activity(context, undo, actor, inbox, true).await
  43   }
  44 }
  45
  46 #[async_trait::async_trait(?Send)]
  47 impl ActivityHandler for UndoFollowCommunity {
  48   type DataType = LemmyContext;
  49   type Error = LemmyError;
  50
  51   fn id(&self) -> &Url {
  52     &self.id
  53   }
  54
  55   fn actor(&self) -> &Url {
  56     self.actor.inner()
  57   }
  58
  59   #[tracing::instrument(skip_all)]
  60   async fn verify(
  61     &self,
  62     context: &Data<LemmyContext>,
  63     request_counter: &mut i32,
  64   ) -> Result<(), LemmyError> {
  65     verify_urls_match(self.actor.inner(), self.object.actor.inner())?;
  66     verify_person(&self.actor, context, request_counter).await?;
  67     self.object.verify(context, request_counter).await?;
  68     Ok(())
  69   }
  70
  71   #[tracing::instrument(skip_all)]
  72   async fn receive(
  73     self,
  74     context: &Data<LemmyContext>,
  75     request_counter: &mut i32,
  76   ) -> Result<(), LemmyError> {
  77     let person = self
  78       .actor
  79       .dereference(context, local_instance(context).await, request_counter)
  80       .await?;
  81     let community = self
  82       .object
  83       .object
  84       .dereference(context, local_instance(context).await, request_counter)
  85       .await?;
  86
  87     let community_follower_form = CommunityFollowerForm {
  88       community_id: community.id,
  89       person_id: person.id,
  90       pending: false,
  91     };
  92
  93     // This will fail if they aren't a follower, but ignore the error.
  94     CommunityFollower::unfollow(context.pool(), &community_follower_form)
  95       .await
  96       .ok();
  97     Ok(())
  98   }
  99 }