]> Untitled Git - lemmy.git/blobdiff - crates/apub/src/activities/voting/vote.rs
Implement federated user following (fixes #752) (#2577)
[lemmy.git] / crates / apub / src / activities / voting / vote.rs
index 5d4c9066e51f63bee436928f9964b8399e458b1d..2b60206a1c02a6f938347b4b0014b249c8d37f1b 100644 (file)
@@ -1,95 +1,46 @@
 use crate::{
   activities::{
-    community::{announce::AnnouncableActivities, send_to_community},
+    community::{announce::GetCommunity, send_activity_in_community},
     generate_activity_id,
-    verify_activity,
     verify_person_in_community,
     voting::{vote_comment, vote_post},
   },
-  context::lemmy_context,
-  fetcher::object_id::ObjectId,
+  activity_lists::AnnouncableActivities,
+  local_instance,
   objects::{community::ApubCommunity, person::ApubPerson},
+  protocol::activities::voting::vote::{Vote, VoteType},
+  ActorType,
   PostOrComment,
 };
-use activitystreams::{base::AnyBase, primitives::OneOrMany, unparsed::Unparsed};
+use activitypub_federation::{core::object_id::ObjectId, data::Data, traits::ActivityHandler};
 use anyhow::anyhow;
-use lemmy_api_common::blocking;
-use lemmy_apub_lib::{
-  data::Data,
-  traits::{ActivityFields, ActivityHandler, ActorType},
-  values::PublicUrl,
+use lemmy_db_schema::{
+  newtypes::CommunityId,
+  source::{community::Community, local_site::LocalSite, post::Post},
+  traits::Crud,
 };
-use lemmy_db_schema::{newtypes::CommunityId, source::community::Community, traits::Crud};
-use lemmy_utils::LemmyError;
+use lemmy_utils::error::LemmyError;
 use lemmy_websocket::LemmyContext;
-use serde::{Deserialize, Serialize};
-use std::{convert::TryFrom, ops::Deref};
-use strum_macros::ToString;
 use url::Url;
 
-#[derive(Clone, Debug, ToString, Deserialize, Serialize)]
-pub enum VoteType {
-  Like,
-  Dislike,
-}
-
-impl TryFrom<i16> for VoteType {
-  type Error = LemmyError;
-
-  fn try_from(value: i16) -> Result<Self, Self::Error> {
-    match value {
-      1 => Ok(VoteType::Like),
-      -1 => Ok(VoteType::Dislike),
-      _ => Err(anyhow!("invalid vote value").into()),
-    }
-  }
-}
-
-impl From<&VoteType> for i16 {
-  fn from(value: &VoteType) -> i16 {
-    match value {
-      VoteType::Like => 1,
-      VoteType::Dislike => -1,
-    }
-  }
-}
-
-#[derive(Clone, Debug, Deserialize, Serialize, ActivityFields)]
-#[serde(rename_all = "camelCase")]
-pub struct Vote {
-  actor: ObjectId<ApubPerson>,
-  to: [PublicUrl; 1],
-  pub(in crate::activities::voting) object: ObjectId<PostOrComment>,
-  cc: [ObjectId<ApubCommunity>; 1],
-  #[serde(rename = "type")]
-  pub(in crate::activities::voting) kind: VoteType,
-  id: Url,
-  #[serde(rename = "@context")]
-  context: OneOrMany<AnyBase>,
-  #[serde(flatten)]
-  unparsed: Unparsed,
-}
-
+/// Vote has as:Public value in cc field, unlike other activities. This indicates to other software
+/// (like GNU social, or presumably Mastodon), that the like actor should not be disclosed.
 impl Vote {
   pub(in crate::activities::voting) fn new(
     object: &PostOrComment,
     actor: &ApubPerson,
-    community: &ApubCommunity,
     kind: VoteType,
     context: &LemmyContext,
   ) -> Result<Vote, LemmyError> {
     Ok(Vote {
       actor: ObjectId::new(actor.actor_id()),
-      to: [PublicUrl::Public],
       object: ObjectId::new(object.ap_id()),
-      cc: [ObjectId::new(community.actor_id())],
       kind: kind.clone(),
       id: generate_activity_id(kind, &context.settings().get_protocol_and_hostname())?,
-      context: lemmy_context(),
-      unparsed: Default::default(),
     })
   }
 
+  #[tracing::instrument(skip_all)]
   pub async fn send(
     object: &PostOrComment,
     actor: &ApubPerson,
@@ -97,42 +48,83 @@ impl Vote {
     kind: VoteType,
     context: &LemmyContext,
   ) -> Result<(), LemmyError> {
-    let community = blocking(context.pool(), move |conn| {
-      Community::read(conn, community_id)
-    })
-    .await??
-    .into();
-    let vote = Vote::new(object, actor, &community, kind, context)?;
-    let vote_id = vote.id.clone();
+    let community = Community::read(context.pool(), community_id).await?.into();
+    let vote = Vote::new(object, actor, kind, context)?;
 
     let activity = AnnouncableActivities::Vote(vote);
-    send_to_community(activity, &vote_id, actor, &community, vec![], context).await
+    send_activity_in_community(activity, actor, &community, vec![], false, context).await
   }
 }
 
 #[async_trait::async_trait(?Send)]
 impl ActivityHandler for Vote {
   type DataType = LemmyContext;
+  type Error = LemmyError;
+
+  fn id(&self) -> &Url {
+    &self.id
+  }
+
+  fn actor(&self) -> &Url {
+    self.actor.inner()
+  }
+
+  #[tracing::instrument(skip_all)]
   async fn verify(
     &self,
     context: &Data<LemmyContext>,
     request_counter: &mut i32,
   ) -> Result<(), LemmyError> {
-    verify_activity(self, &context.settings())?;
-    verify_person_in_community(&self.actor, &self.cc[0], context, request_counter).await?;
+    let community = self.get_community(context, request_counter).await?;
+    verify_person_in_community(&self.actor, &community, context, request_counter).await?;
+    let enable_downvotes = LocalSite::read(context.pool())
+      .await
+      .map(|l| l.enable_downvotes)
+      .unwrap_or(true);
+    if self.kind == VoteType::Dislike && !enable_downvotes {
+      return Err(anyhow!("Downvotes disabled").into());
+    }
     Ok(())
   }
 
+  #[tracing::instrument(skip_all)]
   async fn receive(
     self,
     context: &Data<LemmyContext>,
     request_counter: &mut i32,
   ) -> Result<(), LemmyError> {
-    let actor = self.actor.dereference(context, request_counter).await?;
-    let object = self.object.dereference(context, request_counter).await?;
+    let actor = self
+      .actor
+      .dereference(context, local_instance(context).await, request_counter)
+      .await?;
+    let object = self
+      .object
+      .dereference(context, local_instance(context).await, request_counter)
+      .await?;
     match object {
-      PostOrComment::Post(p) => vote_post(&self.kind, actor, p.deref(), context).await,
+      PostOrComment::Post(p) => vote_post(&self.kind, actor, &p, context).await,
       PostOrComment::Comment(c) => vote_comment(&self.kind, actor, &c, context).await,
     }
   }
 }
+
+#[async_trait::async_trait(?Send)]
+impl GetCommunity for Vote {
+  #[tracing::instrument(skip_all)]
+  async fn get_community(
+    &self,
+    context: &LemmyContext,
+    request_counter: &mut i32,
+  ) -> Result<ApubCommunity, LemmyError> {
+    let object = self
+      .object
+      .dereference(context, local_instance(context).await, request_counter)
+      .await?;
+    let cid = match object {
+      PostOrComment::Post(p) => p.community_id,
+      PostOrComment::Comment(c) => Post::read(context.pool(), c.post_id).await?.community_id,
+    };
+    let community = Community::read(context.pool(), cid).await?;
+    Ok(community.into())
+  }
+}