From ce551e9c8b5a7860b1baf82a3d59fb18ece3d36d Mon Sep 17 00:00:00 2001
From: silverpill <silverpill@firemail.cc>
Date: Fri, 12 Nov 2021 14:51:03 +0000
Subject: [PATCH] Handle incoming Delete() activities

---
 src/activitypub/receiver.rs   | 11 +++++++++++
 src/activitypub/vocabulary.rs |  4 ++++
 2 files changed, 15 insertions(+)

diff --git a/src/activitypub/receiver.rs b/src/activitypub/receiver.rs
index ecdf043..ceafe38 100644
--- a/src/activitypub/receiver.rs
+++ b/src/activitypub/receiver.rs
@@ -14,6 +14,7 @@ use crate::models::posts::queries::{
     create_post,
     get_post_by_id,
     get_post_by_object_id,
+    delete_post,
 };
 use crate::models::profiles::queries::{
     get_profile_by_actor_id,
@@ -255,6 +256,16 @@ pub async fn receive_activity(
                 .map_err(|_| ValidationError("invalid object"))?;
             process_note(config, db_client, object).await?;
         },
+        (DELETE, TOMBSTONE) => {
+            let object: Object = serde_json::from_value(activity.object)
+                .map_err(|_| ValidationError("invalid object"))?;
+            let post = get_post_by_object_id(db_client, &object.id).await?;
+            let deletion_queue = delete_post(db_client, &post.id).await?;
+            let config = config.clone();
+            actix_rt::spawn(async move {
+                deletion_queue.process(&config).await;
+            });
+        },
         (LIKE, _) => {
             let author = get_or_fetch_profile_by_actor_id(
                 db_client,
diff --git a/src/activitypub/vocabulary.rs b/src/activitypub/vocabulary.rs
index a2c9e07..4f7b486 100644
--- a/src/activitypub/vocabulary.rs
+++ b/src/activitypub/vocabulary.rs
@@ -1,6 +1,9 @@
+/// https://www.w3.org/TR/activitystreams-vocabulary/
+
 // Activity types
 pub const ACCEPT: &str = "Accept";
 pub const CREATE: &str = "Create";
+pub const DELETE: &str = "Delete";
 pub const FOLLOW: &str = "Follow";
 pub const LIKE: &str = "Like";
 pub const REJECT: &str = "Reject";
@@ -15,6 +18,7 @@ pub const DOCUMENT: &str = "Document";
 pub const IMAGE: &str = "Image";
 pub const MENTION: &str = "Mention";
 pub const NOTE: &str = "Note";
+pub const TOMBSTONE: &str = "Tombstone";
 
 // Misc
 pub const PROPERTY_VALUE: &str = "PropertyValue";