From bd6f0fba3567ee37c2ba6f25c528eb6590d9dd75 Mon Sep 17 00:00:00 2001
From: Eugen Rochko <eugen@zeonfederated.com>
Date: Thu, 17 Aug 2017 22:15:37 +0200
Subject: [PATCH] Fix #4607 - Accept/reject activities use FollowRequest, which
 has inverse relations (#4616)

---
 .../activitypub/accept_follow_serializer.rb   |  2 +-
 .../activitypub/inverse_follow_serializer.rb  | 22 +++++++++++++++++++
 .../activitypub/reject_follow_serializer.rb   |  2 +-
 3 files changed, 24 insertions(+), 2 deletions(-)
 create mode 100644 app/serializers/activitypub/inverse_follow_serializer.rb

diff --git a/app/serializers/activitypub/accept_follow_serializer.rb b/app/serializers/activitypub/accept_follow_serializer.rb
index 3e23591a52..f1c9d90238 100644
--- a/app/serializers/activitypub/accept_follow_serializer.rb
+++ b/app/serializers/activitypub/accept_follow_serializer.rb
@@ -3,7 +3,7 @@
 class ActivityPub::AcceptFollowSerializer < ActiveModel::Serializer
   attributes :id, :type, :actor
 
-  has_one :object, serializer: ActivityPub::FollowSerializer
+  has_one :object, serializer: ActivityPub::InverseFollowSerializer
 
   def id
     [ActivityPub::TagManager.instance.uri_for(object.target_account), '#accepts/follows/', object.id].join
diff --git a/app/serializers/activitypub/inverse_follow_serializer.rb b/app/serializers/activitypub/inverse_follow_serializer.rb
new file mode 100644
index 0000000000..58e0eaad0b
--- /dev/null
+++ b/app/serializers/activitypub/inverse_follow_serializer.rb
@@ -0,0 +1,22 @@
+# frozen_string_literal: true
+
+class ActivityPub::InverseFollowSerializer < ActiveModel::Serializer
+  attributes :id, :type, :actor
+  attribute :virtual_object, key: :object
+
+  def id
+    [ActivityPub::TagManager.instance.uri_for(object.target_account), '#follows/', object.id].join
+  end
+
+  def type
+    'Follow'
+  end
+
+  def actor
+    ActivityPub::TagManager.instance.uri_for(object.target_account)
+  end
+
+  def virtual_object
+    ActivityPub::TagManager.instance.uri_for(object.account)
+  end
+end
diff --git a/app/serializers/activitypub/reject_follow_serializer.rb b/app/serializers/activitypub/reject_follow_serializer.rb
index 7814f4f575..9a98229143 100644
--- a/app/serializers/activitypub/reject_follow_serializer.rb
+++ b/app/serializers/activitypub/reject_follow_serializer.rb
@@ -3,7 +3,7 @@
 class ActivityPub::RejectFollowSerializer < ActiveModel::Serializer
   attributes :id, :type, :actor
 
-  has_one :object, serializer: ActivityPub::FollowSerializer
+  has_one :object, serializer: ActivityPub::InverseFollowSerializer
 
   def id
     [ActivityPub::TagManager.instance.uri_for(object.target_account), '#rejects/follows/', object.id].join