Contents

class CoinMarketCap::Scraper

  def self.list
    doc = Nokogiri::HTML(open("https://coinmarketcap.com/"))

    doc.search("#currencies tbody tr")[0..9].map { |coin|
      name = coin.search(".currency-name-container").text.strip
      mcap = coin.search(".market-cap").text.strip
      price = coin.search(".price").text.strip
      change = coin.search(".percent-24h").text.strip
      url = coin.search("a").attr('href') # works only with a tag
      CoinMarketCap::Coin.new(name, mcap, price, change, "https://coinmarketcap.com#{url}")
    }
  end

  def self.get_coin(coin)
    doc = Nokogiri::HTML(open(coin.url))

    # add attribute to the coin object
    attributes = {
      :volume => "$#{doc.search(".container .coin-summary-item:nth-child(2) .coin-summary-item-detail span:first-child span:first-child").text.strip}",
      :cir_supply => doc.search(".container .coin-summary-item:nth-child(4) .coin-summary-item-detail").text.strip.gsub(/\s/, ""),
      :max_supply => doc.search(".container .coin-summary-item:nth-child(5) .coin-summary-item-detail").text.strip.gsub(/\s/, ""),
      :website => doc.search("ul.list-unstyled li:first-child a").attr("href") }

    CoinMarketCap::Coin.add_attributes(coin, attributes)
  end

end

Version data entries

2 entries across 2 versions & 1 rubygems

Version	Path
da_coin_market_cap-0.1.1	lib/coin_market_cap/scraper.rb
da_coin_market_cap-0.1.0	lib/coin_market_cap/scraper.rb