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

   1 use crate::activities::{following::follow::FollowCommunity, verify_activity, verify_person};
   2 use activitystreams::activity::kind::UndoType;
   3 use lemmy_api_common::blocking;
   4 use lemmy_apub::fetcher::{
   5   community::get_or_fetch_and_upsert_community,
   6   person::get_or_fetch_and_upsert_person,
   7 };
   8 use lemmy_apub_lib::{verify_urls_match, ActivityCommonFields, ActivityHandler};
   9 use lemmy_db_queries::Followable;
  10 use lemmy_db_schema::source::community::{CommunityFollower, CommunityFollowerForm};
  11 use lemmy_utils::LemmyError;
  12 use lemmy_websocket::LemmyContext;
  13 use url::Url;
  14
  15 #[derive(Clone, Debug, serde::Deserialize, serde::Serialize)]
  16 #[serde(rename_all = "camelCase")]
  17 pub struct UndoFollowCommunity {
  18   to: Url,
  19   object: FollowCommunity,
  20   #[serde(rename = "type")]
  21   kind: UndoType,
  22   #[serde(flatten)]
  23   common: ActivityCommonFields,
  24 }
  25
  26 #[async_trait::async_trait(?Send)]
  27 impl ActivityHandler for UndoFollowCommunity {
  28   async fn verify(
  29     &self,
  30     context: &LemmyContext,
  31     request_counter: &mut i32,
  32   ) -> Result<(), LemmyError> {
  33     verify_activity(self.common())?;
  34     verify_urls_match(&self.to, &self.object.object)?;
  35     verify_urls_match(&self.common.actor, &self.object.common.actor)?;
  36     verify_person(&self.common.actor, context, request_counter).await?;
  37     self.object.verify(context, request_counter).await?;
  38     Ok(())
  39   }
  40
  41   async fn receive(
  42     &self,
  43     context: &LemmyContext,
  44     request_counter: &mut i32,
  45   ) -> Result<(), LemmyError> {
  46     let actor =
  47       get_or_fetch_and_upsert_person(&self.common.actor, context, request_counter).await?;
  48     let community = get_or_fetch_and_upsert_community(&self.to, context, request_counter).await?;
  49
  50     let community_follower_form = CommunityFollowerForm {
  51       community_id: community.id,
  52       person_id: actor.id,
  53       pending: false,
  54     };
  55
  56     // This will fail if they aren't a follower, but ignore the error.
  57     blocking(context.pool(), move |conn| {
  58       CommunityFollower::unfollow(conn, &community_follower_form).ok()
  59     })
  60     .await?;
  61     Ok(())
  62   }
  63
  64   fn common(&self) -> &ActivityCommonFields {
  65     &self.common
  66   }
  67 }