bootstrap alert helper method

application_helper.rb

module ApplicationHelper

  def flash_class(level)
    case level
      when :notice then "info"
      when :success then "success"
      when :error then "danger"
      when :alert then "warning"
      # else "info"
    end
  end

  def alert_box(kind="warning", message="Warnings occurred")
    flash_kind = flash_class(kind.to_sym)
    content_tag(:div, class:"alert alert-#{flash_kind} alert-dismissible", role: "alert") do
      concat(content_tag(:button, type: 'button', class: 'close', data: {dismiss: 'alert'}) do
        concat content_tag(:span, raw('×'), "aria-hidden"=>"true")
        concat content_tag(:span, "Close", class:"sr-only")
      end)
      concat fa_icon('info-circle')
      concat " "
      concat content_tag(:strong, kind.capitalize + '!')
      concat " "
      concat message
    end
  end

  def flash_box(flash_hash)
    capture do
      flash_hash.map do | key, value |
        concat alert_box(key, value)
      end
    end
  end

end