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_api_common::utils::blocking;
  16 use lemmy_db_schema::{
  17   source::community::{CommunityFollower, CommunityFollowerForm},
  18   traits::Followable,
  19 };
  20 use lemmy_utils::error::LemmyError;
  21 use lemmy_websocket::LemmyContext;
  22 use url::Url;
  23
  24 impl UndoFollowCommunity {
  25   #[tracing::instrument(skip_all)]
  26   pub async fn send(
  27     actor: &ApubPerson,
  28     community: &ApubCommunity,
  29     context: &LemmyContext,
  30   ) -> Result<(), LemmyError> {
  31     let object = FollowCommunity::new(actor, community, context)?;
  32     let undo = UndoFollowCommunity {
  33       actor: ObjectId::new(actor.actor_id()),
  34       object,
  35       kind: UndoType::Undo,
  36       id: generate_activity_id(
  37         UndoType::Undo,
  38         &context.settings().get_protocol_and_hostname(),
  39       )?,
  40       unparsed: Default::default(),
  41     };
  42     let inbox = vec![community.shared_inbox_or_inbox()];
  43     send_lemmy_activity(context, undo, actor, inbox, true).await
  44   }
  45 }
  46
  47 #[async_trait::async_trait(?Send)]
  48 impl ActivityHandler for UndoFollowCommunity {
  49   type DataType = LemmyContext;
  50   type Error = LemmyError;
  51
  52   fn id(&self) -> &Url {
  53     &self.id
  54   }
  55
  56   fn actor(&self) -> &Url {
  57     self.actor.inner()
  58   }
  59
  60   #[tracing::instrument(skip_all)]
  61   async fn verify(
  62     &self,
  63     context: &Data<LemmyContext>,
  64     request_counter: &mut i32,
  65   ) -> Result<(), LemmyError> {
  66     verify_urls_match(self.actor.inner(), self.object.actor.inner())?;
  67     verify_person(&self.actor, context, request_counter).await?;
  68     self.object.verify(context, request_counter).await?;
  69     Ok(())
  70   }
  71
  72   #[tracing::instrument(skip_all)]
  73   async fn receive(
  74     self,
  75     context: &Data<LemmyContext>,
  76     request_counter: &mut i32,
  77   ) -> Result<(), LemmyError> {
  78     let person = self
  79       .actor
  80       .dereference(context, local_instance(context), request_counter)
  81       .await?;
  82     let community = self
  83       .object
  84       .object
  85       .dereference(context, local_instance(context), request_counter)
  86       .await?;
  87
  88     let community_follower_form = CommunityFollowerForm {
  89       community_id: community.id,
  90       person_id: person.id,
  91       pending: false,
  92     };
  93
  94     // This will fail if they aren't a follower, but ignore the error.
  95     blocking(context.pool(), move |conn| {
  96       CommunityFollower::unfollow(conn, &community_follower_form).ok()
  97     })
  98     .await?;
  99     Ok(())
 100   }
 101 }