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_received_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       to: Some([community.id().into()]),
  36       object,
  37       kind: UndoType::Undo,
  38       id: generate_activity_id(
  39         UndoType::Undo,
  40         &context.settings().get_protocol_and_hostname(),
  41       )?,
  42     };
  43     let inbox = vec![community.shared_inbox_or_inbox()];
  44     send_lemmy_activity(context, undo, actor, inbox, true).await
  45   }
  46 }
  47
  48 #[async_trait::async_trait]
  49 impl ActivityHandler for UndoFollow {
  50   type DataType = LemmyContext;
  51   type Error = LemmyError;
  52
  53   fn id(&self) -> &Url {
  54     &self.id
  55   }
  56
  57   fn actor(&self) -> &Url {
  58     self.actor.inner()
  59   }
  60
  61   #[tracing::instrument(skip_all)]
  62   async fn verify(&self, context: &Data<LemmyContext>) -> Result<(), LemmyError> {
  63     insert_received_activity(&self.id, context).await?;
  64     verify_urls_match(self.actor.inner(), self.object.actor.inner())?;
  65     verify_person(&self.actor, context).await?;
  66     self.object.verify(context).await?;
  67     if let Some(to) = &self.to {
  68       verify_urls_match(to[0].inner(), self.object.object.inner())?;
  69     }
  70     Ok(())
  71   }
  72
  73   #[tracing::instrument(skip_all)]
  74   async fn receive(self, context: &Data<LemmyContext>) -> Result<(), LemmyError> {
  75     let person = self.actor.dereference(context).await?;
  76     let object = self.object.object.dereference(context).await?;
  77
  78     match object {
  79       UserOrCommunity::User(u) => {
  80         let form = PersonFollowerForm {
  81           person_id: u.id,
  82           follower_id: person.id,
  83           pending: false,
  84         };
  85         PersonFollower::unfollow(&mut context.pool(), &form).await?;
  86       }
  87       UserOrCommunity::Community(c) => {
  88         let form = CommunityFollowerForm {
  89           community_id: c.id,
  90           person_id: person.id,
  91           pending: false,
  92         };
  93         CommunityFollower::unfollow(&mut context.pool(), &form).await?;
  94       }
  95     }
  96
  97     Ok(())
  98   }
  99 }