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

   1 use crate::{
   2   activities::{generate_activity_id, send_lemmy_activity, verify_person},
   3   fetcher::user_or_community::UserOrCommunity,
   4   insert_activity,
   5   objects::{community::ApubCommunity, person::ApubPerson},
   6   protocol::activities::following::{follow::Follow, undo_follow::UndoFollow},
   7 };
   8 use activitypub_federation::{
   9   config::Data,
  10   kinds::activity::UndoType,
  11   protocol::verification::verify_urls_match,
  12   traits::{ActivityHandler, Actor},
  13 };
  14 use lemmy_api_common::context::LemmyContext;
  15 use lemmy_db_schema::{
  16   source::{
  17     community::{CommunityFollower, CommunityFollowerForm},
  18     person::{PersonFollower, PersonFollowerForm},
  19   },
  20   traits::Followable,
  21 };
  22 use lemmy_utils::error::LemmyError;
  23 use url::Url;
  24
  25 impl UndoFollow {
  26   #[tracing::instrument(skip_all)]
  27   pub async fn send(
  28     actor: &ApubPerson,
  29     community: &ApubCommunity,
  30     context: &Data<LemmyContext>,
  31   ) -> Result<(), LemmyError> {
  32     let object = Follow::new(actor, community, context)?;
  33     let undo = UndoFollow {
  34       actor: actor.id().into(),
  35       object,
  36       kind: UndoType::Undo,
  37       id: generate_activity_id(
  38         UndoType::Undo,
  39         &context.settings().get_protocol_and_hostname(),
  40       )?,
  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]
  48 impl ActivityHandler for UndoFollow {
  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(&self, context: &Data<LemmyContext>) -> Result<(), LemmyError> {
  62     verify_urls_match(self.actor.inner(), self.object.actor.inner())?;
  63     verify_person(&self.actor, context).await?;
  64     self.object.verify(context).await?;
  65     Ok(())
  66   }
  67
  68   #[tracing::instrument(skip_all)]
  69   async fn receive(self, context: &Data<LemmyContext>) -> Result<(), LemmyError> {
  70     insert_activity(&self.id, &self, false, true, context).await?;
  71     let person = self.actor.dereference(context).await?;
  72     let object = self.object.object.dereference(context).await?;
  73
  74     match object {
  75       UserOrCommunity::User(u) => {
  76         let form = PersonFollowerForm {
  77           person_id: u.id,
  78           follower_id: person.id,
  79           pending: false,
  80         };
  81         PersonFollower::unfollow(context.pool(), &form).await?;
  82       }
  83       UserOrCommunity::Community(c) => {
  84         let form = CommunityFollowerForm {
  85           community_id: c.id,
  86           person_id: person.id,
  87           pending: false,
  88         };
  89         CommunityFollower::unfollow(context.pool(), &form).await?;
  90       }
  91     }
  92
  93     Ok(())
  94   }
  95 }