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

   1 use crate::{
   2   activities::{
   3     community::{announce::GetCommunity, 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::activities::voting::{
  12     undo_vote::UndoVote,
  13     vote::{Vote, VoteType},
  14   },
  15   ActorType,
  16   PostOrComment,
  17 };
  18 use activitypub_federation::{
  19   core::object_id::ObjectId,
  20   data::Data,
  21   traits::ActivityHandler,
  22   utils::verify_urls_match,
  23 };
  24 use activitystreams_kinds::activity::UndoType;
  25 use lemmy_db_schema::{newtypes::CommunityId, source::community::Community, traits::Crud};
  26 use lemmy_utils::error::LemmyError;
  27 use lemmy_websocket::LemmyContext;
  28 use url::Url;
  29
  30 impl UndoVote {
  31   /// UndoVote has as:Public value in cc field, unlike other activities. This indicates to other
  32   /// software (like GNU social, or presumably Mastodon), that the like actor should not be
  33   /// disclosed.
  34   #[tracing::instrument(skip_all)]
  35   pub async fn send(
  36     object: &PostOrComment,
  37     actor: &ApubPerson,
  38     community_id: CommunityId,
  39     kind: VoteType,
  40     context: &LemmyContext,
  41   ) -> Result<(), LemmyError> {
  42     let community: ApubCommunity = Community::read(context.pool(), community_id).await?.into();
  43
  44     let object = Vote::new(object, actor, kind.clone(), context)?;
  45     let id = generate_activity_id(
  46       UndoType::Undo,
  47       &context.settings().get_protocol_and_hostname(),
  48     )?;
  49     let undo_vote = UndoVote {
  50       actor: ObjectId::new(actor.actor_id()),
  51       object,
  52       kind: UndoType::Undo,
  53       id: id.clone(),
  54     };
  55     let activity = AnnouncableActivities::UndoVote(undo_vote);
  56     send_activity_in_community(activity, actor, &community, vec![], false, context).await
  57   }
  58 }
  59
  60 #[async_trait::async_trait(?Send)]
  61 impl ActivityHandler for UndoVote {
  62   type DataType = LemmyContext;
  63   type Error = LemmyError;
  64
  65   fn id(&self) -> &Url {
  66     &self.id
  67   }
  68
  69   fn actor(&self) -> &Url {
  70     self.actor.inner()
  71   }
  72
  73   #[tracing::instrument(skip_all)]
  74   async fn verify(
  75     &self,
  76     context: &Data<LemmyContext>,
  77     request_counter: &mut i32,
  78   ) -> Result<(), LemmyError> {
  79     let community = self.get_community(context, request_counter).await?;
  80     verify_person_in_community(&self.actor, &community, context, request_counter).await?;
  81     verify_urls_match(self.actor.inner(), self.object.actor.inner())?;
  82     self.object.verify(context, request_counter).await?;
  83     Ok(())
  84   }
  85
  86   #[tracing::instrument(skip_all)]
  87   async fn receive(
  88     self,
  89     context: &Data<LemmyContext>,
  90     request_counter: &mut i32,
  91   ) -> Result<(), LemmyError> {
  92     let actor = self
  93       .actor
  94       .dereference(context, local_instance(context).await, request_counter)
  95       .await?;
  96     let object = self
  97       .object
  98       .object
  99       .dereference(context, local_instance(context).await, request_counter)
 100       .await?;
 101     match object {
 102       PostOrComment::Post(p) => undo_vote_post(actor, &p, context).await,
 103       PostOrComment::Comment(c) => undo_vote_comment(actor, &c, context).await,
 104     }
 105   }
 106 }
 107
 108 #[async_trait::async_trait(?Send)]
 109 impl GetCommunity for UndoVote {
 110   #[tracing::instrument(skip_all)]
 111   async fn get_community(
 112     &self,
 113     context: &LemmyContext,
 114     request_counter: &mut i32,
 115   ) -> Result<ApubCommunity, LemmyError> {
 116     self.object.get_community(context, request_counter).await
 117   }
 118 }