require 'net/ping'

module Janis

  module Testing

    def self.connectable?(proxy)
      host, port = proxy.split(':')
      return Net::Ping::TCP.new(host, port).ping
    end

    def self.filter_results(criteria = [], results)
      criteria.each do |criterion| # A criterion is a method that returns true or false about a proxy, like #connectable?
        results.select! { |proxy| Janis::Testing.send(criterion, "#{proxy[:ip]}:#{proxy[:port]}") }
      end
      results
    end

  end

end