Simple USPS API for verifying addresses

usps_address.rb

class USPSAddress

  EXEMPT_ADDRESS_PARTS = ["NW", "NE", "SW", "SE"]

  def initialize
    @usps = USPS.new(USPS_USER_ID)
  end

  def parse_address(address)
    location = Location.new(address)
    response = @usps.verify_address(location)
    
    if (response[/error/])
      response
    else
      format_address(response)
    end

  end

  def format_address(full_address)
    formatted_address = ''

    address = "#{full_address[:address2]} #{full_address[:address1]}".split(' ').each { |str|
      if EXEMPT_ADDRESS_PARTS.include?(str)
        formatted_address << "#{str} "
      else
        formatted_address << "#{str.titleize} "
      end
    }

    {
      :address => formatted_address.strip, 
      :city => full_address[:city].titleize,
      :state => full_address[:state],
      :zip => full_address[:zip5]
    }
  end
end