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

   1 use crate::{
   2   activities::{
   3     community::send_activity_in_community,
   4     generate_activity_id,
   5     verify_person_in_community,
   6     voting::{vote_comment, vote_post},
   7   },
   8   activity_lists::AnnouncableActivities,
   9   local_instance,
  10   objects::{community::ApubCommunity, person::ApubPerson},
  11   protocol::{
  12     activities::voting::vote::{Vote, VoteType},
  13     InCommunity,
  14   },
  15   ActorType,
  16   PostOrComment,
  17 };
  18 use activitypub_federation::{core::object_id::ObjectId, data::Data, traits::ActivityHandler};
  19 use anyhow::anyhow;
  20 use lemmy_db_schema::{
  21   newtypes::CommunityId,
  22   source::{community::Community, local_site::LocalSite},
  23   traits::Crud,
  24 };
  25 use lemmy_utils::error::LemmyError;
  26 use lemmy_websocket::LemmyContext;
  27 use url::Url;
  28
  29 /// Vote has as:Public value in cc field, unlike other activities. This indicates to other software
  30 /// (like GNU social, or presumably Mastodon), that the like actor should not be disclosed.
  31 impl Vote {
  32   pub(in crate::activities::voting) fn new(
  33     object: &PostOrComment,
  34     actor: &ApubPerson,
  35     community: &ApubCommunity,
  36     kind: VoteType,
  37     context: &LemmyContext,
  38   ) -> Result<Vote, LemmyError> {
  39     Ok(Vote {
  40       actor: ObjectId::new(actor.actor_id()),
  41       object: ObjectId::new(object.ap_id()),
  42       kind: kind.clone(),
  43       id: generate_activity_id(kind, &context.settings().get_protocol_and_hostname())?,
  44       audience: Some(ObjectId::new(community.actor_id())),
  45     })
  46   }
  47
  48   #[tracing::instrument(skip_all)]
  49   pub async fn send(
  50     object: &PostOrComment,
  51     actor: &ApubPerson,
  52     community_id: CommunityId,
  53     kind: VoteType,
  54     context: &LemmyContext,
  55   ) -> Result<(), LemmyError> {
  56     let community = Community::read(context.pool(), community_id).await?.into();
  57     let vote = Vote::new(object, actor, &community, kind, context)?;
  58
  59     let activity = AnnouncableActivities::Vote(vote);
  60     send_activity_in_community(activity, actor, &community, vec![], false, context).await
  61   }
  62 }
  63
  64 #[async_trait::async_trait(?Send)]
  65 impl ActivityHandler for Vote {
  66   type DataType = LemmyContext;
  67   type Error = LemmyError;
  68
  69   fn id(&self) -> &Url {
  70     &self.id
  71   }
  72
  73   fn actor(&self) -> &Url {
  74     self.actor.inner()
  75   }
  76
  77   #[tracing::instrument(skip_all)]
  78   async fn verify(
  79     &self,
  80     context: &Data<LemmyContext>,
  81     request_counter: &mut i32,
  82   ) -> Result<(), LemmyError> {
  83     let community = self.community(context, request_counter).await?;
  84     verify_person_in_community(&self.actor, &community, context, request_counter).await?;
  85     let enable_downvotes = LocalSite::read(context.pool())
  86       .await
  87       .map(|l| l.enable_downvotes)
  88       .unwrap_or(true);
  89     if self.kind == VoteType::Dislike && !enable_downvotes {
  90       return Err(anyhow!("Downvotes disabled").into());
  91     }
  92     Ok(())
  93   }
  94
  95   #[tracing::instrument(skip_all)]
  96   async fn receive(
  97     self,
  98     context: &Data<LemmyContext>,
  99     request_counter: &mut i32,
 100   ) -> Result<(), LemmyError> {
 101     let actor = self
 102       .actor
 103       .dereference(context, local_instance(context).await, request_counter)
 104       .await?;
 105     let object = self
 106       .object
 107       .dereference(context, local_instance(context).await, request_counter)
 108       .await?;
 109     match object {
 110       PostOrComment::Post(p) => vote_post(&self.kind, actor, &p, context).await,
 111       PostOrComment::Comment(c) => vote_comment(&self.kind, actor, &c, context).await,
 112     }
 113   }
 114 }