openproject/app/models/custom_style.rb

class CustomStyle < ActiveRecord::Base
  mount_uploader :logo, OpenProject::Configuration.file_uploader
  mount_uploader :favicon, OpenProject::Configuration.file_uploader
  mount_uploader :touch_icon, OpenProject::Configuration.file_uploader

  class << self
    def current
      RequestStore.fetch(:current_custom_style) do
        custom_style = CustomStyle.order('created_at DESC').first
        if custom_style.nil?
          return nil
        else
          custom_style
        end
      end
    end
  end

  def digest
    updated_at.to_i
  end

  %i(favicon touch_icon logo).each do |name|
    define_method "#{name}_path" do
      image = send(name)

      if image.readable?
        image.local_file.path
      end
    end
  end
end