From 09f04d710d2b3acbd604ca1678c59c4bd5edfa78 Mon Sep 17 00:00:00 2001
From: Eugen Rochko <eugen@zeonfederated.com>
Date: Thu, 27 Oct 2022 19:17:48 +0200
Subject: [PATCH] Change `closed_registrations_message` to `message` and add
 Markdown (#19486)

---
 app/serializers/rest/instance_serializer.rb | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/app/serializers/rest/instance_serializer.rb b/app/serializers/rest/instance_serializer.rb
index 2a4da8c3b3..5ae1099d04 100644
--- a/app/serializers/rest/instance_serializer.rb
+++ b/app/serializers/rest/instance_serializer.rb
@@ -83,7 +83,7 @@ class REST::InstanceSerializer < ActiveModel::Serializer
     {
       enabled: registrations_enabled?,
       approval_required: Setting.registrations_mode == 'approved',
-      closed_registrations_message: registrations_enabled? ? nil : Setting.closed_registrations_message,
+      message: registrations_enabled? ? nil : registrations_message,
     }
   end
 
@@ -92,4 +92,16 @@ class REST::InstanceSerializer < ActiveModel::Serializer
   def registrations_enabled?
     Setting.registrations_mode != 'none' && !Rails.configuration.x.single_user_mode
   end
+
+  def registrations_message
+    if Setting.closed_registrations_message.present?
+      markdown.render(Setting.closed_registrations_message)
+    else
+      nil
+    end
+  end
+
+  def markdown
+    @markdown ||= Redcarpet::Markdown.new(Redcarpet::Render::HTML, no_images: true)
+  end
 end