splattael/structr

require 'structr'

LineItem = Struct.new(:number, :description, :price)

class Invoice
  include Structr

  converter :line_item do |*matched|
    LineItem.new(*matched)
  end

  int_accessor :number,      /#(\d+)/
  field_accessor :address,     /Address:\n(.*?)\n(.*?)\n(.*?)\n/
  date_accessor :date,        /on (\d+-\d+-\d+)/
  line_item :line_items,  /^(\d+)\.\s+(.*?)\s+(\d+,\d+)$/

  def items
    Array(@line_items)
  end
end

string = (STDIN.tty? ? DATA : STDIN).read

invoice = Invoice.structr(string)
p invoice
p invoice.items
p invoice.number

__END__
This is #23             on 2009-04-30

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# TODO
 * Subtypes? LineItem