iterating through a vcf file to add a field

contacts.rb

load 'vpim-13.11.11/lib/vpim/vcard.rb'

#read file as string
address_book = File.open('contacts.vcf')
contents = address_book.read

#load contacts
original = Vpim::Vcard.decode(contents)

#create new file
new_book = File.new("contacts_modified.vcf", "w")
new_book.write("")
new_book = File.new("contacts_modified.vcf", "a")

#loop through all contacts
original.each do |contact|
	modified = Vpim::Vcard::Maker.make2 do |maker|
		maker.copy(contact) do |field|
			field
		end
	end

	#adding IM address to vcard
	Vpim::Vcard::Maker.make2(modified) do |maker|
		first_last = contact.email[0, contact.email.index('@')]
		maker.add_x_jabber(first_last+"@spark.nextjump.com")
		puts 'Adding '+ first_last 
	end

	#append contact to file
	new_book.write(modified)
end


new_book.close
puts "done"