Fazer download dos vídeos de Dragon Ball Super do site de animes http://www.animakai.tv/

download_videos.rb

require 'open-uri'
require 'open_uri_redirections'
require 'nokogiri'
require 'pry'

LINKS_FILE = 'links.txt'
BASE_URL = 'http://www.animakai.tv'
NAMESPACE = 'anime/1877'
VIDEOS_DIRECTORY = 'videos'

URL = "#{BASE_URL}/#{NAMESPACE}"

def download_video(link, file_name)
	puts "Downloading video #{file_name}..."

	File.open("#{VIDEOS_DIRECTORY}/#{file_name}.mp4", 'wb') do |file|
		file << open(link, allow_redirections: :safe).read
	end

	puts "Donwload complete\n"
end

unless File.file?(LINKS_FILE)
	home_html = Nokogiri::HTML(open(URL))

	episode_links = []

	home_html.css('.item-pg-anime').each do |item_pg_anime|
		link = item_pg_anime.at_css('a:first-child')
		episode_links << link['href']
	end

	download_links = []

	episode_links.each do |episode_link|
		episode_num = episode_link.split('/').last
		episode_url = "#{BASE_URL}#{episode_link}"
		episode_html = Nokogiri::HTML(open(episode_url))

		download_link = episode_html.at_css("source[type^='video/mp4']")
		download_links << [download_link['src'], episode_num]
		puts download_link['src']
	end

	Dir.mkdir VIDEOS_DIRECTORY unless Dir.exist?(VIDEOS_DIRECTORY)

	download_links.delete_if { |link| link[0].strip.empty? }

	download_links.each do |link|
		File.open(LINKS_FILE, 'a') { |file| file.puts("#{link[0]}, #{link[1]}") }
	end

	download_links.each { |link| download_video(link[0], link[1]) }
else
	File.foreach(LINKS_FILE) do |line|
		link, file_name = line.split(',').map(&:strip)
		download_video(link, file_name)
	end
end