class ProxyFinder

# File lib/proxy_finder.rb, line 6
def initialize
  @progressbar
end

# File lib/proxy_finder.rb, line 10
def start(files)

  infile = File.open(files[:infile], 'r')
  outfile = File.open(files[:outfile], 'a')

  # Get number of lines in file to set the progress bar's width
  # Rewind the file pointer because apparently `count` advances it to the end
  lines = infile.count
  infile.rewind

  @progressbar = ProgressBar.create(title: 'Checking hosts...',
                                    format: '%a |%b>>%i| %p%% %t',
                                    length: 80,
                                    total: lines)

  infile.readlines.map {|line| line.rstrip}.each do |host|

    # Displaying progress
    @progressbar

    # Extracting IP Address and Port from host
    ip, port = host.split(':')
    port = 80 if port.nil?

    # Carriage return, blanking up to last host length, carriage return
    if Net::Ping::HTTP.new(ip, port).ping?
      outfile.puts host
    end

    @progressbar.increment

  end

  infile.close
  outfile.close

end