class GtfsExport < Export

  validates_presence_of :time_zone
  option :time_zone
  option :object_id_prefix
  
  after_initialize :init_params
  
  def references_types
    [ Chouette::Line, Chouette::Network, Chouette::Company, Chouette::StopArea ]
  end

  def init_params
    if time_zone.nil?
      self.time_zone = "Paris"
    end
  end
  
  def export_options
    opts = super.merge(:format => :gtfs, :time_zone => ActiveSupport::TimeZone.find_tzinfo(time_zone).name)
    if object_id_prefix.present?
      opts = opts.merge(:object_id_prefix => object_id_prefix)
    end
    puts opts.inspect
    opts
  end

end