gem 'rails-settings-ui'
gem 'rails-settings-cached'
# or
gem 'rails-settings'
# or your fork of rails-settings

# adds initializer and route:
rails g rails_settings_ui:install

RailsSettingsUi.setup do |config|
  config.ignored_settings = [:company_name] # Settings not displayed in the interface
end

# engine root:
rails_settings_ui_url

class Settings < RailsSettings::CachedSettings
  defaults[:company_name] = "Company name"
  defaults[:head_name] = "Head name"
  defaults[:manager_premium] = 19
  defaults[:show_contract_fields] = true
  defaults[:launch_mode] = [:auto, :manual]
end

Rails.application.config.to_prepare do
  # Use admin layout:
  RailsSettingsUi::ApplicationController.module_eval do
    layout 'admin'
  end
  # If you are using a custom layout, you will want to make app routes available to rails-setting-ui:
  RailsSettingsUi.inline_main_app_routes!
end

RailsSettingsUi.parent_controller = 'Admin::ApplicationController' # default: '::ApplicationController'

Rails.application.config.to_prepare do
  RailsSettingsUi::ApplicationController.module_eval do
    before_filter :check_settings_permissions
  
    private
    def check_settings_permissions
       render status: 403 unless current_user && can_manage_settings?(current_user)
    end
  end
end