dl_parser.rb

require 'rubygems'
require 'date'

class DriverLicenseParser

  attr_accessor :first_name, :last_name, :middle_name, :address_1, :city, :state, :zip, :birth_month, :birth_year, :birth_day, :license_class, :sex, :hair_color, :eyes_color, :lbs

  def initialize(license = [])
    @license = license
    parse_mag_strip
  end

  def date_of_birth
    date = "#{birth_year}-#{birth_month}-#{birth_day}"
    Date.parse(date)
  end

  def expires
    date = "20#{@expires_year}-#{birth_month}-#{birth_day}"
    Date.parse(date)
  end

  def license_class
    @license_class
  end

  def license_number
    "#{@dl_letter}#{@license_num}"
  end

  def dimension
    { :feet => @ft, :inches => @in }
  end

  def to_s
    "Drivers License: #{license_number}\nFirst Name: #{first_name} \nLast Name: #{last_name} \nAddress: #{address_1} \nCity: #{city} \nState: #{state} \nZip: #{zip} \nDOB: #{date_of_birth} \nExpires: #{expires} \nLicense Class: #{license_class} \nSex: #{sex} \nHair Color: #{hair_color} \nEyes Color: #{eyes_color} \nDimension: #{dimension[:feet]}' #{dimension[:inches]}\" \nWeight: #{lbs}\n\n"
  end

  def days_old
    (Date.today - date_of_birth).to_i    
  end

  def years_old
    days_old.to_i / 365
  end

  def can_drink?
    years_old >= 21 ? true : false
  end

  def can_smoke?
    years_old >= 18 ? true : false
  end

  private

  def parse_mag_strip
    trk = @license.split('?')
    flds = trk[0].split('^')
    @state = flds[0][1,2]  
    @city = flds[0][3,99]      
    name = flds[1].split('$')
    @last_name = name[0]
    @first_name = name[1]
    @middle_name= name[2]
    @zip = trk[2][3,10]
    @street_address = flds[2]

    @date_of_birth = trk[1][19..24]
    @birth_month = @date_of_birth[0..1]
    @birth_year = @date_of_birth[2..5]
    @birth_day = trk[1][27..29]
    @expires_year = trk[1][17..18]
    @license_num = trk[1][9..15]

    other_info = trk[2].gsub(/ /,'')

    @license_class = other_info[8..8]
    @sex = other_info[9..9]
    @ft = other_info[10..10]
    @in = other_info[11..12]

    @hair_color = other_info[16..18]
    @eyes_color = other_info[19..21]
    @dl_letter = other_info[22..22]
    @lbs = other_info[13..15]
  end

end