Download afp video

afp_video.rb

require 'open-uri'
require 'fileutils'

def add_log(recode)
  recode = [Time.now, recode + "\n"].join(",\s")
  File.write(File.join(__dir__, 'downlod.log'), recode, mode: 'a')
end

def load_log
  File.open(File.join(__dir__, 'downlod.log')).read
end

def downlod(url)
  dldir = File.join(__dir__, '/mp4')
  Dir.mkdir(dldir) unless Dir.exist?(dldir)
  Dir.chdir(dldir)

  cmd = ['youtube-dl', url]
  system(*cmd)
end

def scan_video_articles
  url = 'https://www.afpbb.com/subcategory/m_afp_afpmov'
  html = URI.open(url).read
  reg = %r[a href="/articles/-/(\d{7})" class="block move">]
  html.scan(reg).uniq.flatten
end

saved_video_ids = load_log
video_articles = scan_video_articles.reject { |article_id| saved_video_ids.include?(article_id) }

puts("Download #{video_articles.size}video")
video_articles.each do |article_id|
  url = "https://www.afpbb.com/articles/-/#{article_id}"
  downlod(url) || add_log(article_id)
end