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