gist_id.rb

require 'rubygems'
require 'nokogiri'
require 'open-uri'

class GistID
  GIST_URL = 'http://gist.github.com/'
  ALL_LIMIT = 10

  def initialize user = get_user
    @user = (user.nil? || user == :all) ? 'gists' : user
  end

  def get_user
    user = `git config --global github.user`.strip
    user.empty? ? nil : user
  end

  def recent
    extract_id GIST_URL + @user
  end

  def all
    page_size = pages
    if page_size > ALL_LIMIT
      raise 'page limit over'
    end

    urls = Array.new(page_size){ |i| i + 1}.map{ |i| "#{GIST_URL}#{@user}?page=#{i}"}
    urls.map { |i| extract_id(i) }.flatten.uniq
  end

  def extract_id url
    doc = Nokogiri::HTML read(url)
    doc.css('.file .info a').map { |i| i['href'].sub('/', '') }
  end

  def pages
    url = GIST_URL + @user
    doc = Nokogiri::HTML read(url)
    a = doc.css('.pagination a')
    if a.size < 3
      1
    else
      a[a.size - 2].inner_text.to_i
    end
  end

  def read url
    # puts url
    open(url)
  end
end

# gi = GistID.new
# p gi
# p gi.recent
# p gi.all