module ApplicationHelper
  def bootstrap_class_for flash_type
    { success: "alert-success", error: "alert-danger", alert: "alert-warning", notice: "alert-info" }[flash_type.to_sym] || flash_type.to_s
  end

  def flash_messages(opts = {})
    capture do
      flash.each do |msg_type, message|
        concat(content_tag(:div, message, class: "alert #{bootstrap_class_for(msg_type)} alert-dismissible", role: 'alert') do
          concat(content_tag(:button, class: 'close', data: { dismiss: 'alert' }) do
            concat content_tag(:span, '×'.html_safe, 'aria-hidden' => true)
            concat content_tag(:span, 'Close', class: 'sr-only')
          end)
          concat message
        end)
      end
      nil
    end
  end
end