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

   1 use crate::{
   2   activities::{
   3     generate_activity_id,
   4     verify_person_in_community,
   5     voting::{vote_comment, vote_post},
   6   },
   7   local_instance,
   8   objects::{community::ApubCommunity, person::ApubPerson},
   9   protocol::{
  10     activities::voting::vote::{Vote, VoteType},
  11     InCommunity,
  12   },
  13   ActorType,
  14   PostOrComment,
  15 };
  16 use activitypub_federation::{core::object_id::ObjectId, data::Data, traits::ActivityHandler};
  17 use anyhow::anyhow;
  18 use lemmy_api_common::context::LemmyContext;
  19 use lemmy_db_schema::source::local_site::LocalSite;
  20 use lemmy_utils::error::LemmyError;
  21 use url::Url;
  22
  23 impl Vote {
  24   pub(in crate::activities::voting) fn new(
  25     object_id: ObjectId<PostOrComment>,
  26     actor: &ApubPerson,
  27     community: &ApubCommunity,
  28     kind: VoteType,
  29     context: &LemmyContext,
  30   ) -> Result<Vote, LemmyError> {
  31     Ok(Vote {
  32       actor: ObjectId::new(actor.actor_id()),
  33       object: object_id,
  34       kind: kind.clone(),
  35       id: generate_activity_id(kind, &context.settings().get_protocol_and_hostname())?,
  36       audience: Some(ObjectId::new(community.actor_id())),
  37     })
  38   }
  39 }
  40
  41 #[async_trait::async_trait(?Send)]
  42 impl ActivityHandler for Vote {
  43   type DataType = LemmyContext;
  44   type Error = LemmyError;
  45
  46   fn id(&self) -> &Url {
  47     &self.id
  48   }
  49
  50   fn actor(&self) -> &Url {
  51     self.actor.inner()
  52   }
  53
  54   #[tracing::instrument(skip_all)]
  55   async fn verify(
  56     &self,
  57     context: &Data<LemmyContext>,
  58     request_counter: &mut i32,
  59   ) -> Result<(), LemmyError> {
  60     let community = self.community(context, request_counter).await?;
  61     verify_person_in_community(&self.actor, &community, context, request_counter).await?;
  62     let enable_downvotes = LocalSite::read(context.pool())
  63       .await
  64       .map(|l| l.enable_downvotes)
  65       .unwrap_or(true);
  66     if self.kind == VoteType::Dislike && !enable_downvotes {
  67       return Err(anyhow!("Downvotes disabled").into());
  68     }
  69     Ok(())
  70   }
  71
  72   #[tracing::instrument(skip_all)]
  73   async fn receive(
  74     self,
  75     context: &Data<LemmyContext>,
  76     request_counter: &mut i32,
  77   ) -> Result<(), LemmyError> {
  78     let actor = self
  79       .actor
  80       .dereference(context, local_instance(context).await, request_counter)
  81       .await?;
  82     let object = self
  83       .object
  84       .dereference(context, local_instance(context).await, request_counter)
  85       .await?;
  86     match object {
  87       PostOrComment::Post(p) => vote_post(&self.kind, actor, &p, context).await,
  88       PostOrComment::Comment(c) => vote_comment(&self.kind, actor, &c, context).await,
  89     }
  90   }
  91 }