crates/apub/src/activities/voting/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::{vote_comment, vote_post},
   9   },
  10   activity_lists::AnnouncableActivities,
  11   objects::{community::ApubCommunity, person::ApubPerson},
  12   protocol::activities::voting::vote::{Vote, VoteType},
  13   PostOrComment,
  14 };
  15 use activitystreams_kinds::public;
  16 use anyhow::anyhow;
  17 use lemmy_api_common::blocking;
  18 use lemmy_apub_lib::{
  19   data::Data,
  20   object_id::ObjectId,
  21   traits::{ActivityHandler, ActorType},
  22 };
  23 use lemmy_db_schema::{
  24   newtypes::CommunityId,
  25   source::{community::Community, post::Post, site::Site},
  26   traits::Crud,
  27 };
  28 use lemmy_utils::LemmyError;
  29 use lemmy_websocket::LemmyContext;
  30
  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       to: vec![public()],
  42       object: ObjectId::new(object.ap_id()),
  43       cc: vec![community.actor_id()],
  44       kind: kind.clone(),
  45       id: generate_activity_id(kind, &context.settings().get_protocol_and_hostname())?,
  46       unparsed: Default::default(),
  47     })
  48   }
  49
  50   #[tracing::instrument(skip_all)]
  51   pub async fn send(
  52     object: &PostOrComment,
  53     actor: &ApubPerson,
  54     community_id: CommunityId,
  55     kind: VoteType,
  56     context: &LemmyContext,
  57   ) -> Result<(), LemmyError> {
  58     let community = blocking(context.pool(), move |conn| {
  59       Community::read(conn, community_id)
  60     })
  61     .await??
  62     .into();
  63     let vote = Vote::new(object, actor, &community, kind, context)?;
  64     let vote_id = vote.id.clone();
  65
  66     let activity = AnnouncableActivities::Vote(vote);
  67     send_activity_in_community(activity, &vote_id, actor, &community, vec![], context).await
  68   }
  69 }
  70
  71 #[async_trait::async_trait(?Send)]
  72 impl ActivityHandler for Vote {
  73   type DataType = LemmyContext;
  74
  75   #[tracing::instrument(skip_all)]
  76   async fn verify(
  77     &self,
  78     context: &Data<LemmyContext>,
  79     request_counter: &mut i32,
  80   ) -> Result<(), LemmyError> {
  81     verify_is_public(&self.to, &self.cc)?;
  82     verify_activity(&self.id, self.actor.inner(), &context.settings())?;
  83     let community = self.get_community(context, request_counter).await?;
  84     verify_person_in_community(&self.actor, &community, context, request_counter).await?;
  85     let site = blocking(context.pool(), Site::read_local_site).await??;
  86     if self.kind == VoteType::Dislike && !site.enable_downvotes {
  87       return Err(anyhow!("Downvotes disabled").into());
  88     }
  89     Ok(())
  90   }
  91
  92   #[tracing::instrument(skip_all)]
  93   async fn receive(
  94     self,
  95     context: &Data<LemmyContext>,
  96     request_counter: &mut i32,
  97   ) -> Result<(), LemmyError> {
  98     let actor = self
  99       .actor
 100       .dereference(context, context.client(), request_counter)
 101       .await?;
 102     let object = self
 103       .object
 104       .dereference(context, context.client(), request_counter)
 105       .await?;
 106     match object {
 107       PostOrComment::Post(p) => vote_post(&self.kind, actor, &p, context).await,
 108       PostOrComment::Comment(c) => vote_comment(&self.kind, actor, &c, context).await,
 109     }
 110   }
 111 }
 112
 113 #[async_trait::async_trait(?Send)]
 114 impl GetCommunity for Vote {
 115   #[tracing::instrument(skip_all)]
 116   async fn get_community(
 117     &self,
 118     context: &LemmyContext,
 119     request_counter: &mut i32,
 120   ) -> Result<ApubCommunity, LemmyError> {
 121     let object = self
 122       .object
 123       .dereference(context, context.client(), request_counter)
 124       .await?;
 125     let cid = match object {
 126       PostOrComment::Post(p) => p.community_id,
 127       PostOrComment::Comment(c) => {
 128         blocking(context.pool(), move |conn| Post::read(conn, c.post_id))
 129           .await??
 130           .community_id
 131       }
 132     };
 133     let community = blocking(context.pool(), move |conn| Community::read(conn, cid)).await??;
 134     Ok(community.into())
 135   }
 136 }