From 102fbc25be29c56df1356f9cfae2e73b712d9d8d Mon Sep 17 00:00:00 2001
From: fef <owo@fef.moe>
Date: Sat, 3 Dec 2022 08:24:23 +0000
Subject: [PATCH] support Undo action for EmojiReaction

---
 app/lib/activitypub/activity/undo.rb | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/app/lib/activitypub/activity/undo.rb b/app/lib/activitypub/activity/undo.rb
index 9eff1b71c9..54cda1947f 100644
--- a/app/lib/activitypub/activity/undo.rb
+++ b/app/lib/activitypub/activity/undo.rb
@@ -11,6 +11,8 @@ class ActivityPub::Activity::Undo < ActivityPub::Activity
       undo_follow
     when 'Like'
       undo_like
+    when 'EmojiReact'
+      undo_emoji_react
     when 'Block'
       undo_block
     when nil
@@ -113,6 +115,22 @@ class ActivityPub::Activity::Undo < ActivityPub::Activity
     end
   end
 
+  def undo_emoji_react
+    name = @object['content']
+    return if name.nil?
+
+    status = status_from_uri(target_uri)
+
+    return if status.nil? || !status.account.local?
+
+    if @account.reacted?(status, name.delete(':'))
+      reaction = status.status_reactions.where(account: @account, name: name).first
+      reaction&.destroy
+    else
+      delete_later!(object_uri)
+    end
+  end
+
   def undo_block
     target_account = account_from_uri(target_uri)