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

   1 use crate::{
   2   activities::{following::follow::FollowCommunity, verify_activity, verify_person},
   3   fetcher::{community::get_or_fetch_and_upsert_community, person::get_or_fetch_and_upsert_person},
   4 };
   5 use activitystreams::activity::kind::UndoType;
   6 use lemmy_api_common::blocking;
   7 use lemmy_apub_lib::{verify_urls_match, ActivityCommonFields, ActivityHandler};
   8 use lemmy_db_queries::Followable;
   9 use lemmy_db_schema::source::community::{CommunityFollower, CommunityFollowerForm};
  10 use lemmy_utils::LemmyError;
  11 use lemmy_websocket::LemmyContext;
  12 use url::Url;
  13
  14 #[derive(Clone, Debug, serde::Deserialize, serde::Serialize)]
  15 #[serde(rename_all = "camelCase")]
  16 pub struct UndoFollowCommunity {
  17   to: Url,
  18   object: FollowCommunity,
  19   #[serde(rename = "type")]
  20   kind: UndoType,
  21   #[serde(flatten)]
  22   common: ActivityCommonFields,
  23 }
  24
  25 #[async_trait::async_trait(?Send)]
  26 impl ActivityHandler for UndoFollowCommunity {
  27   async fn verify(
  28     &self,
  29     context: &LemmyContext,
  30     request_counter: &mut i32,
  31   ) -> Result<(), LemmyError> {
  32     verify_activity(self.common())?;
  33     verify_urls_match(&self.to, &self.object.object)?;
  34     verify_urls_match(&self.common.actor, &self.object.common.actor)?;
  35     verify_person(&self.common.actor, context, request_counter).await?;
  36     self.object.verify(context, request_counter).await?;
  37     Ok(())
  38   }
  39
  40   async fn receive(
  41     &self,
  42     context: &LemmyContext,
  43     request_counter: &mut i32,
  44   ) -> Result<(), LemmyError> {
  45     let actor =
  46       get_or_fetch_and_upsert_person(&self.common.actor, context, request_counter).await?;
  47     let community = get_or_fetch_and_upsert_community(&self.to, context, request_counter).await?;
  48
  49     let community_follower_form = CommunityFollowerForm {
  50       community_id: community.id,
  51       person_id: actor.id,
  52       pending: false,
  53     };
  54
  55     // This will fail if they aren't a follower, but ignore the error.
  56     blocking(context.pool(), move |conn| {
  57       CommunityFollower::unfollow(conn, &community_follower_form).ok()
  58     })
  59     .await?;
  60     Ok(())
  61   }
  62
  63   fn common(&self) -> &ActivityCommonFields {
  64     &self.common
  65   }
  66 }