class Itinerary < ActiveRecord::Base
  has_many :events
  
  def duration
    # ... omitted for clarity
  end
  
  def visited_ports
    # ... omitted for clarity
  end
  
  def depart(port, time_spec)
    events.build(:code => 'D', :port => port, 
      :event_date => Chronic.parse(time_spec))
  end
  
  def arrive(port, time_spec)
    events.build(:code => 'A', :port => port, 
      :event_date => Chronic.parse(time_spec))
  end
end