Add undos for delete community, post, and comment.

1 files changed, 44 insertions, 0 deletions

diff --git a/server/src/apub/community.rs b/server/src/apub/community.rs
index 336aa24f..c4d9bf83 100644
--- a/server/src/apub/community.rs
+++ b/server/src/apub/community.rs
@@ -137,6 +137,50 @@ impl ActorType for Community {
     Ok(())
   }
 
+  fn send_undo_delete(&self, creator: &User_, conn: &PgConnection) -> Result<(), Error> {
+    let group = self.to_apub(conn)?;
+    let id = format!("{}/delete/{}", self.actor_id, uuid::Uuid::new_v4());
+
+    let mut delete = Delete::default();
+    populate_object_props(&mut delete.object_props, &self.get_followers_url(), &id)?;
+
+    delete
+      .delete_props
+      .set_actor_xsd_any_uri(creator.actor_id.to_owned())?
+      .set_object_base_box(group)?;
+
+    // Undo that fake activity
+    let undo_id = format!("{}/undo/delete/{}", self.actor_id, uuid::Uuid::new_v4());
+    let mut undo = Undo::default();
+
+    populate_object_props(&mut undo.object_props, &self.get_followers_url(), &undo_id)?;
+
+    undo
+      .undo_props
+      .set_actor_xsd_any_uri(creator.actor_id.to_owned())?
+      .set_object_base_box(delete)?;
+
+    // Insert the sent activity into the activity table
+    let activity_form = activity::ActivityForm {
+      user_id: self.creator_id,
+      data: serde_json::to_value(&undo)?,
+      local: true,
+      updated: None,
+    };
+    activity::Activity::create(&conn, &activity_form)?;
+
+    // Note: For an accept, since it was automatic, no one pushed a button,
+    // the community was the actor.
+    // But for delete, the creator is the actor, and does the signing
+    send_activity(
+      &undo,
+      &creator.private_key.as_ref().unwrap(),
+      &creator.actor_id,
+      self.get_follower_inboxes(&conn)?,
+    )?;
+    Ok(())
+  }
+
   /// For a given community, returns the inboxes of all followers.
   fn get_follower_inboxes(&self, conn: &PgConnection) -> Result<Vec<String>, Error> {
     Ok(