require 'nokogiri'
require 'open-uri'
require 'csv'

csv = CSV.open("out.csv", "wb")

(1..100).each do |page|  # ustawic ile stron ma sciagac
  main_url = "https://allegro.pl/kategoria/samochody-osobowe-4029?order=m&p=#{page}"
  print "Pobieranie strony:#{page}  "
  data = Nokogiri::HTML(open(main_url))
  print " OK\n"
  (1..60).each do |record|  # bo 60 rekordow na stronie
    lp = ( page - 1 ) * 60 + record
    filerec = Array.new

    opis =      data.xpath("/html/body/div[2]/div[3]/div/div/div/div/div[2]/div[2]/div/div[3]/div/div/div/div/div/div/div/section[2]/section/article[#{record}]/div/div/div[2]/div[1]/h2/a").text
    przebieg =  data.xpath("/html/body/div[2]/div[3]/div/div/div/div/div[2]/div[2]/div/div[3]/div/div/div/div/div/div/div/section[2]/section/article[#{record}]/div/div/div[2]/div[1]/div/dl/dd[3]/span").text
    przebieg.gsub! ' km', ''  #wyciecie koncowki

    rocznik =   data.xpath("/html/body/div[2]/div[3]/div/div/div/div/div[2]/div[2]/div/div[3]/div/div/div/div/div/div/div/section[2]/section/article[#{record}]/div/div/div[2]/div[1]/div/dl/dd[2]/span").text

    cena =      data.xpath("/html/body/div[2]/div[3]/div/div/div/div/div[2]/div[2]/div/div[3]/div/div/div/div/div/div/div/section[2]/section/article[#{record}]/div/div/div[2]/div[2]/div/div/span/span").text
    cena.gsub!( /(,\d\d zł)/, '' )  #wywalenie koncowki
    cena.gsub!( ' ', '' ) #wywalenie pustych spacji

    csv << [ lp, przebieg, rocznik, cena, opis ]
  end
end