Use audience field to federate items in groups (fixes #2464) (#2584)

[lemmy.git] / crates / apub / src / protocol / activities / deletion / undo_delete.rs

diff --git a/crates/apub/src/protocol/activities/deletion/undo_delete.rs b/crates/apub/src/protocol/activities/deletion/undo_delete.rs
index 02cbf1785f44f40a821beb8e4714d1dd37115b6e..c4946850a1896e55ce848466de407ced7886e42a 100644 (file)
--- a/crates/apub/src/protocol/activities/deletion/undo_delete.rs
+++ b/crates/apub/src/protocol/activities/deletion/undo_delete.rs
@@ -1,9 +1,18 @@
-use crate::{objects::person::ApubPerson, protocol::activities::deletion::delete::Delete};
+use crate::{
+  activities::verify_community_matches,
+  local_instance,
+  objects::{community::ApubCommunity, person::ApubPerson},
+  protocol::{activities::deletion::delete::Delete, InCommunity},
+};
 use activitypub_federation::{core::object_id::ObjectId, deser::helpers::deserialize_one_or_many};
 use activitystreams_kinds::activity::UndoType;
+use lemmy_utils::error::LemmyError;
+use lemmy_websocket::LemmyContext;
 use serde::{Deserialize, Serialize};
+use serde_with::skip_serializing_none;
 use url::Url;
 
+#[skip_serializing_none]
 #[derive(Clone, Debug, Deserialize, Serialize)]
 #[serde(rename_all = "camelCase")]
 pub struct UndoDelete {
@@ -14,8 +23,29 @@ pub struct UndoDelete {
   #[serde(rename = "type")]
   pub(crate) kind: UndoType,
   pub(crate) id: Url,
+  pub(crate) audience: Option<ObjectId<ApubCommunity>>,
 
   #[serde(deserialize_with = "deserialize_one_or_many", default)]
   #[serde(skip_serializing_if = "Vec::is_empty")]
   pub(crate) cc: Vec<Url>,
 }
+
+#[async_trait::async_trait(?Send)]
+impl InCommunity for UndoDelete {
+  async fn community(
+    &self,
+    context: &LemmyContext,
+    request_counter: &mut i32,
+  ) -> Result<ApubCommunity, LemmyError> {
+    let object_community = self.object.community(context, request_counter).await?;
+    if let Some(audience) = &self.audience {
+      let audience = audience
+        .dereference(context, local_instance(context).await, request_counter)
+        .await?;
+      verify_community_matches(&audience, object_community.id)?;
+      Ok(audience)
+    } else {
+      Ok(object_community)
+    }
+  }
+}