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

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