DEV: configurable public sidebar sections (#20303)

Extension of https://github.com/discourse/discourse/pull/20057

Admin can create a public session visible to everyone. An additional checkbox is displayed for staff members.

app/serializers/current_user_serializer.rb

@@ -77,6 +77,13 @@ class CurrentUserSerializer < BasicUserSerializer
 
   has_one :user_option, embed: :object, serializer: CurrentUserOptionSerializer
 
+  def sidebar_sections
+    SidebarSection
+      .where("public OR user_id = ?", object.id)
+      .order("(public IS TRUE) DESC")
+      .map { |section| SidebarSectionSerializer.new(section, root: false) }
+  end
+
   def groups
     owned_group_ids = GroupUser.where(user_id: id, owner: true).pluck(:group_id).to_set
 

app/serializers/sidebar_section_serializer.rb

@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 class SidebarSectionSerializer < ApplicationSerializer
-  attributes :id, :title, :links, :slug
+  attributes :id, :title, :links, :slug, :public
 
   def links
     object.sidebar_section_links.map(&:linkable)