From 0397c58b61d8a364ff488fc5631bfc751903c242 Mon Sep 17 00:00:00 2001
From: Eugen Rochko <eugen@zeonfederated.com>
Date: Sat, 26 Aug 2017 18:52:53 +0200
Subject: [PATCH] Forward ActivityPub deletes to followers of rebloggers
 (#4706)

---
 app/lib/activitypub/activity/delete.rb        | 19 ++++++++++++++-
 .../activitypub/raw_distribution_worker.rb    | 23 +++++++++++++++++++
 2 files changed, 41 insertions(+), 1 deletion(-)
 create mode 100644 app/workers/activitypub/raw_distribution_worker.rb

diff --git a/app/lib/activitypub/activity/delete.rb b/app/lib/activitypub/activity/delete.rb
index a1598dfd32..e7eb53a020 100644
--- a/app/lib/activitypub/activity/delete.rb
+++ b/app/lib/activitypub/activity/delete.rb
@@ -8,7 +8,24 @@ class ActivityPub::Activity::Delete < ActivityPub::Activity
     if status.nil?
       delete_later!(object_uri)
     else
-      RemoveStatusService.new.call(status)
+      forward_for_reblogs(status)
+      delete_now!(status)
     end
   end
+
+  private
+
+  def forward_for_reblogs(status)
+    ActivityPub::RawDistributionWorker.push_bulk(status.reblogs.includes(:account).references(:account).merge(Account.local).pluck(:account_id)) do |account|
+      [payload, account.id]
+    end
+  end
+
+  def delete_now!(status)
+    RemoveStatusService.new.call(status)
+  end
+
+  def payload
+    @payload ||= Oj.dump(@json)
+  end
 end
diff --git a/app/workers/activitypub/raw_distribution_worker.rb b/app/workers/activitypub/raw_distribution_worker.rb
new file mode 100644
index 0000000000..d73466f6e5
--- /dev/null
+++ b/app/workers/activitypub/raw_distribution_worker.rb
@@ -0,0 +1,23 @@
+# frozen_string_literal: true
+
+class ActivityPub::RawDistributionWorker
+  include Sidekiq::Worker
+
+  sidekiq_options queue: 'push'
+
+  def perform(json, source_account_id)
+    @account = Account.find(source_account_id)
+
+    ActivityPub::DeliveryWorker.push_bulk(inboxes) do |inbox_url|
+      [json, @account.id, inbox_url]
+    end
+  rescue ActiveRecord::RecordNotFound
+    true
+  end
+
+  private
+
+  def inboxes
+    @inboxes ||= @account.followers.inboxes
+  end
+end