From be202f9377fecfc801befac0be6d11d9f0039c5d Mon Sep 17 00:00:00 2001
From: Eugen Rochko <eugen@zeonfederated.com>
Date: Tue, 30 Oct 2018 15:03:55 +0100
Subject: [PATCH] Accept the same payload in multiple inboxes and deliver
 (#9150)

---
 app/lib/activitypub/activity/create.rb   | 20 +++++++++++++++++++-
 app/services/fan_out_on_write_service.rb |  6 ++----
 2 files changed, 21 insertions(+), 5 deletions(-)

diff --git a/app/lib/activitypub/activity/create.rb b/app/lib/activitypub/activity/create.rb
index baa05e14c..45079e2b3 100644
--- a/app/lib/activitypub/activity/create.rb
+++ b/app/lib/activitypub/activity/create.rb
@@ -10,7 +10,12 @@ class ActivityPub::Activity::Create < ActivityPub::Activity
     RedisLock.acquire(lock_options) do |lock|
       if lock.acquired?
         @status = find_existing_status
-        process_status if @status.nil?
+
+        if @status.nil?
+          process_status
+        elsif @options[:delivered_to_account_id].present?
+          postprocess_audience_and_deliver
+        end
       else
         raise Mastodon::RaceConditionError
       end
@@ -99,6 +104,19 @@ class ActivityPub::Activity::Create < ActivityPub::Activity
     @params[:visibility] = :limited
   end
 
+  def postprocess_audience_and_deliver
+    return if @status.mentions.find_by(account_id: @options[:delivered_to_account_id])
+
+    delivered_to_account = Account.find(@options[:delivered_to_account_id])
+
+    @status.mentions.create(account: delivered_to_account, silent: true)
+    @status.update(visibility: :limited) if @status.direct_visibility?
+
+    return unless delivered_to_account.following?(@account)
+
+    FeedInsertWorker.perform_async(@status.id, delivered_to_account.id, :home)
+  end
+
   def attach_tags(status)
     @tags.each do |tag|
       status.tags << tag
diff --git a/app/services/fan_out_on_write_service.rb b/app/services/fan_out_on_write_service.rb
index 7f2a91775..f3e9c855d 100644
--- a/app/services/fan_out_on_write_service.rb
+++ b/app/services/fan_out_on_write_service.rb
@@ -58,10 +58,8 @@ class FanOutOnWriteService < BaseService
   def deliver_to_mentioned_followers(status)
     Rails.logger.debug "Delivering status #{status.id} to limited followers"
 
-    status.mentions.includes(:account).each do |mention|
-      mentioned_account = mention.account
-      next if !mentioned_account.local? || !mentioned_account.following?(status.account) || FeedManager.instance.filter?(:home, status, mention.account_id)
-      FeedManager.instance.push_to_home(mentioned_account, status)
+    FeedInsertWorker.push_bulk(status.mentions.includes(:account).map(&:account).select { |mentioned_account| mentioned_account.local? && mentioned_account.following?(status.account) }) do |follower|
+      [status.id, follower.id, :home]
     end
   end