require "drexed/datetime/version"

module Drexed
  module Datetime
    class Engine < ::Rails::Engine
      ## Time.datetime_to("yyyy-mm-dd") => "2012-03-04"
      def datetime_to(tach)
        delineators = tach.scan /\W+/
        formatters  = tach.scan /[a-z]+/i
        units       = { "yy"   => "y",
                        "yyyy" => "Y",
                        "m"    => "-m",
                        "mm"   => "m",
                        "M"    => "b",
                        "MM"   => "B",
                        "d"    => "-d",
                        "dd"   => "d",
                        "D"    => "a",
                        "DD"   => "A",
                        "h"    => "-I",
                        "hh"   => "I",
                        "H"    => "-H",
                        "HH"   => "H",
                        "mi"   => "M",
                        "p"    => "P",
                        "P"    => "p" }
        strftime(formatters.map{ |f| "%#{units[f]}#{delineators.shift || ""}" }.join)
      end
    end
  end
end

Time.send :include, Drexed::Datetime
Date.send :include, Drexed::Datetime
DateTime.send :include, Drexed::Datetime