Ruby Secret Santa

invisible.rb

# Ruby Secret Santa
# Javier Aranda <jaranda@nosolosoftware.es>
# MIT license

# friends list
@friends = [
  { name: 'Jesús Taguas', alias: 'jtaguas' },
  { name: 'Rafa García', alias: 'rgarcia' },
  { name: 'Jesús González', alias: 'jgonzalez' },
  { name: 'Paco Hidalgo', alias: 'fhidalgo' },
  { name: 'Juan Antonio Galisteo', alias: 'jgalisteo' },
  { name: 'Alberto Galisteo', alias: 'agalisteo' },
  { name: 'Luis Ciudad', alias: 'lciudad' },
  { name: 'Javier Aranda', alias: 'jaranda' },
  { name: 'Rafael Perez', alias: 'rperez' },
  { name: 'Rafael Jurado', alias: 'rjurado' },
  { name: 'Carlos Barasona', alias: 'cbarasona' },
  { name: 'Francisco Aranda', alias: 'faranda' },
  { name: 'Juan Manuel Jurado', alias: 'jjurado' },
  { name: 'Shelma Hayoun', alias: 'shayoun' },
  { name: 'Teresa Prieto', alias: 'tprieto' },
  { name: 'Pedro Navajas', alias: 'pnavajas' },
  { name: 'Francisco Vena', alias: 'fvena' }
]

@max = @friends.count

# already selected friends
@selected_for_give_present = []
@selected_for_receive_present = []

@giver = nil
@receiver = nil

loop do
  break if @selected_for_give_present.count == @max

  # select available giver
  loop do
    @giver = Random.rand(@max)
    break if not @selected_for_give_present.include? @giver
  end

  # select available receiver
  loop do
    @receiver = Random.rand(@max)
    break if not @selected_for_receive_present.include? @receiver and @giver != @receiver
  end

  # notify pair
  puts "#{@friends[@giver - 1][:name]} (giver) => #{@friends[@receiver - 1][:name]} (receiver)"

  # TODO: remove puts and notify by email (givers only)

  # adds pair to selected arrays
  @selected_for_give_present << @giver
  @selected_for_receive_present << @receiver
end