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_api_common::utils::blocking;
  26 use lemmy_db_schema::{newtypes::CommunityId, source::community::Community, traits::Crud};
  27 use lemmy_utils::error::LemmyError;
  28 use lemmy_websocket::LemmyContext;
  29 use url::Url;
  30
  31 impl UndoVote {
  32   /// UndoVote has as:Public value in cc field, unlike other activities. This indicates to other
  33   /// software (like GNU social, or presumably Mastodon), that the like actor should not be
  34   /// disclosed.
  35   #[tracing::instrument(skip_all)]
  36   pub async fn send(
  37     object: &PostOrComment,
  38     actor: &ApubPerson,
  39     community_id: CommunityId,
  40     kind: VoteType,
  41     context: &LemmyContext,
  42   ) -> Result<(), LemmyError> {
  43     let community: ApubCommunity = blocking(context.pool(), move |conn| {
  44       Community::read(conn, community_id)
  45     })
  46     .await??
  47     .into();
  48
  49     let object = Vote::new(object, actor, kind.clone(), context)?;
  50     let id = generate_activity_id(
  51       UndoType::Undo,
  52       &context.settings().get_protocol_and_hostname(),
  53     )?;
  54     let undo_vote = UndoVote {
  55       actor: ObjectId::new(actor.actor_id()),
  56       object,
  57       kind: UndoType::Undo,
  58       id: id.clone(),
  59       unparsed: Default::default(),
  60     };
  61     let activity = AnnouncableActivities::UndoVote(undo_vote);
  62     send_activity_in_community(activity, actor, &community, vec![], context).await
  63   }
  64 }
  65
  66 #[async_trait::async_trait(?Send)]
  67 impl ActivityHandler for UndoVote {
  68   type DataType = LemmyContext;
  69   type Error = LemmyError;
  70
  71   fn id(&self) -> &Url {
  72     &self.id
  73   }
  74
  75   fn actor(&self) -> &Url {
  76     self.actor.inner()
  77   }
  78
  79   #[tracing::instrument(skip_all)]
  80   async fn verify(
  81     &self,
  82     context: &Data<LemmyContext>,
  83     request_counter: &mut i32,
  84   ) -> Result<(), LemmyError> {
  85     let community = self.get_community(context, request_counter).await?;
  86     verify_person_in_community(&self.actor, &community, context, request_counter).await?;
  87     verify_urls_match(self.actor.inner(), self.object.actor.inner())?;
  88     self.object.verify(context, request_counter).await?;
  89     Ok(())
  90   }
  91
  92   #[tracing::instrument(skip_all)]
  93   async fn receive(
  94     self,
  95     context: &Data<LemmyContext>,
  96     request_counter: &mut i32,
  97   ) -> Result<(), LemmyError> {
  98     let actor = self
  99       .actor
 100       .dereference(context, local_instance(context), request_counter)
 101       .await?;
 102     let object = self
 103       .object
 104       .object
 105       .dereference(context, local_instance(context), request_counter)
 106       .await?;
 107     match object {
 108       PostOrComment::Post(p) => undo_vote_post(actor, &p, context).await,
 109       PostOrComment::Comment(c) => undo_vote_comment(actor, &c, context).await,
 110     }
 111   }
 112 }
 113
 114 #[async_trait::async_trait(?Send)]
 115 impl GetCommunity for UndoVote {
 116   #[tracing::instrument(skip_all)]
 117   async fn get_community(
 118     &self,
 119     context: &LemmyContext,
 120     request_counter: &mut i32,
 121   ) -> Result<ApubCommunity, LemmyError> {
 122     self.object.get_community(context, request_counter).await
 123   }
 124 }