crates/apub/src/activities/voting/undo_vote.rs

   1 use crate::{
   2   activities::{
   3     community::send_activity_in_community,
   4     generate_activity_id,
   5     verify_person_in_community,
   6     voting::{undo_vote_comment, undo_vote_post},
   7   },
   8   activity_lists::AnnouncableActivities,
   9   local_instance,
  10   objects::{community::ApubCommunity, person::ApubPerson},
  11   protocol::{
  12     activities::voting::{
  13       undo_vote::UndoVote,
  14       vote::{Vote, VoteType},
  15     },
  16     InCommunity,
  17   },
  18   ActorType,
  19   PostOrComment,
  20 };
  21 use activitypub_federation::{
  22   core::object_id::ObjectId,
  23   data::Data,
  24   traits::ActivityHandler,
  25   utils::verify_urls_match,
  26 };
  27 use activitystreams_kinds::activity::UndoType;
  28 use lemmy_db_schema::{newtypes::CommunityId, source::community::Community, traits::Crud};
  29 use lemmy_utils::error::LemmyError;
  30 use lemmy_websocket::LemmyContext;
  31 use url::Url;
  32
  33 impl UndoVote {
  34   /// UndoVote has as:Public value in cc field, unlike other activities. This indicates to other
  35   /// software (like GNU social, or presumably Mastodon), that the like actor should not be
  36   /// disclosed.
  37   #[tracing::instrument(skip_all)]
  38   pub async fn send(
  39     object: &PostOrComment,
  40     actor: &ApubPerson,
  41     community_id: CommunityId,
  42     kind: VoteType,
  43     context: &LemmyContext,
  44   ) -> Result<(), LemmyError> {
  45     let community: ApubCommunity = Community::read(context.pool(), community_id).await?.into();
  46
  47     let object = Vote::new(object, actor, &community, kind.clone(), context)?;
  48     let id = generate_activity_id(
  49       UndoType::Undo,
  50       &context.settings().get_protocol_and_hostname(),
  51     )?;
  52     let undo_vote = UndoVote {
  53       actor: ObjectId::new(actor.actor_id()),
  54       object,
  55       kind: UndoType::Undo,
  56       id: id.clone(),
  57       audience: Some(ObjectId::new(community.actor_id())),
  58     };
  59     let activity = AnnouncableActivities::UndoVote(undo_vote);
  60     send_activity_in_community(activity, actor, &community, vec![], false, context).await
  61   }
  62 }
  63
  64 #[async_trait::async_trait(?Send)]
  65 impl ActivityHandler for UndoVote {
  66   type DataType = LemmyContext;
  67   type Error = LemmyError;
  68
  69   fn id(&self) -> &Url {
  70     &self.id
  71   }
  72
  73   fn actor(&self) -> &Url {
  74     self.actor.inner()
  75   }
  76
  77   #[tracing::instrument(skip_all)]
  78   async fn verify(
  79     &self,
  80     context: &Data<LemmyContext>,
  81     request_counter: &mut i32,
  82   ) -> Result<(), LemmyError> {
  83     let community = self.community(context, request_counter).await?;
  84     verify_person_in_community(&self.actor, &community, context, request_counter).await?;
  85     verify_urls_match(self.actor.inner(), self.object.actor.inner())?;
  86     self.object.verify(context, request_counter).await?;
  87     Ok(())
  88   }
  89
  90   #[tracing::instrument(skip_all)]
  91   async fn receive(
  92     self,
  93     context: &Data<LemmyContext>,
  94     request_counter: &mut i32,
  95   ) -> Result<(), LemmyError> {
  96     let actor = self
  97       .actor
  98       .dereference(context, local_instance(context).await, request_counter)
  99       .await?;
 100     let object = self
 101       .object
 102       .object
 103       .dereference(context, local_instance(context).await, request_counter)
 104       .await?;
 105     match object {
 106       PostOrComment::Post(p) => undo_vote_post(actor, &p, context).await,
 107       PostOrComment::Comment(c) => undo_vote_comment(actor, &c, context).await,
 108     }
 109   }
 110 }