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_activity,
   6     verify_is_public,
   7     verify_person_in_community,
   8     voting::{undo_vote_comment, undo_vote_post},
   9   },
  10   activity_lists::AnnouncableActivities,
  11   objects::{community::ApubCommunity, person::ApubPerson},
  12   protocol::activities::voting::{
  13     undo_vote::UndoVote,
  14     vote::{Vote, VoteType},
  15   },
  16   PostOrComment,
  17 };
  18 use activitystreams_kinds::{activity::UndoType, public};
  19 use lemmy_api_common::utils::blocking;
  20 use lemmy_apub_lib::{
  21   data::Data,
  22   object_id::ObjectId,
  23   traits::{ActivityHandler, ActorType},
  24   verify::verify_urls_match,
  25 };
  26 use lemmy_db_schema::{newtypes::CommunityId, source::community::Community, traits::Crud};
  27 use lemmy_utils::LemmyError;
  28 use lemmy_websocket::LemmyContext;
  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 = blocking(context.pool(), move |conn| {
  43       Community::read(conn, community_id)
  44     })
  45     .await??
  46     .into();
  47
  48     let object = Vote::new(object, actor, &community, kind.clone(), context)?;
  49     let id = generate_activity_id(
  50       UndoType::Undo,
  51       &context.settings().get_protocol_and_hostname(),
  52     )?;
  53     let undo_vote = UndoVote {
  54       actor: ObjectId::new(actor.actor_id()),
  55       to: vec![community.actor_id()],
  56       object,
  57       cc: vec![public()],
  58       kind: UndoType::Undo,
  59       id: id.clone(),
  60       unparsed: Default::default(),
  61     };
  62     let activity = AnnouncableActivities::UndoVote(undo_vote);
  63     send_activity_in_community(activity, &id, actor, &community, vec![], context).await
  64   }
  65 }
  66
  67 #[async_trait::async_trait(?Send)]
  68 impl ActivityHandler for UndoVote {
  69   type DataType = LemmyContext;
  70
  71   #[tracing::instrument(skip_all)]
  72   async fn verify(
  73     &self,
  74     context: &Data<LemmyContext>,
  75     request_counter: &mut i32,
  76   ) -> Result<(), LemmyError> {
  77     verify_is_public(&self.to, &self.cc)?;
  78     verify_activity(&self.id, self.actor.inner(), &context.settings())?;
  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, context.client(), request_counter)
  95       .await?;
  96     let object = self
  97       .object
  98       .object
  99       .dereference(context, context.client(), 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 }