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

   1 use crate::{
   2   activities::{
   3     generate_activity_id,
   4     verify_person_in_community,
   5     voting::{undo_vote_comment, undo_vote_post},
   6   },
   7   local_instance,
   8   objects::{community::ApubCommunity, person::ApubPerson},
   9   protocol::{
  10     activities::voting::{undo_vote::UndoVote, vote::Vote},
  11     InCommunity,
  12   },
  13   ActorType,
  14   PostOrComment,
  15 };
  16 use activitypub_federation::{
  17   core::object_id::ObjectId,
  18   data::Data,
  19   traits::ActivityHandler,
  20   utils::verify_urls_match,
  21 };
  22 use activitystreams_kinds::activity::UndoType;
  23 use lemmy_api_common::context::LemmyContext;
  24 use lemmy_utils::error::LemmyError;
  25 use url::Url;
  26
  27 impl UndoVote {
  28   pub(in crate::activities::voting) fn new(
  29     vote: Vote,
  30     actor: &ApubPerson,
  31     community: &ApubCommunity,
  32     context: &LemmyContext,
  33   ) -> Result<Self, LemmyError> {
  34     Ok(UndoVote {
  35       actor: ObjectId::new(actor.actor_id()),
  36       object: vote,
  37       kind: UndoType::Undo,
  38       id: generate_activity_id(
  39         UndoType::Undo,
  40         &context.settings().get_protocol_and_hostname(),
  41       )?,
  42       audience: Some(ObjectId::new(community.actor_id())),
  43     })
  44   }
  45 }
  46
  47 #[async_trait::async_trait(?Send)]
  48 impl ActivityHandler for UndoVote {
  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(
  62     &self,
  63     context: &Data<LemmyContext>,
  64     request_counter: &mut i32,
  65   ) -> Result<(), LemmyError> {
  66     let community = self.community(context, request_counter).await?;
  67     verify_person_in_community(&self.actor, &community, context, request_counter).await?;
  68     verify_urls_match(self.actor.inner(), self.object.actor.inner())?;
  69     self.object.verify(context, request_counter).await?;
  70     Ok(())
  71   }
  72
  73   #[tracing::instrument(skip_all)]
  74   async fn receive(
  75     self,
  76     context: &Data<LemmyContext>,
  77     request_counter: &mut i32,
  78   ) -> Result<(), LemmyError> {
  79     let actor = self
  80       .actor
  81       .dereference(context, local_instance(context).await, request_counter)
  82       .await?;
  83     let object = self
  84       .object
  85       .object
  86       .dereference(context, local_instance(context).await, request_counter)
  87       .await?;
  88     match object {
  89       PostOrComment::Post(p) => undo_vote_post(actor, &p, context).await,
  90       PostOrComment::Comment(c) => undo_vote_comment(actor, &c, context).await,
  91     }
  92   }
  93 }