require 'rubygems'
require_gem 'activesupport'
require 'active_support'
require 'date'

class String
  def time_string_parse
    time_string = downcase.strip.gsub(/\s+/, ' ')
    time = Time.now

    case time_string
    when /\btomorrow\b/
      time += 86400
    end

    case time_string
    when /\bat (\d+)(am|pm)\b/
      time = Time.local(time.year, time.month, time.day, $1.to_i + ($2 == 'pm' ? 12 : 0), 0, 0)
    end

    time
  end
end