#!/usr/bin/ruby -w
#
# whatever-dl, a script to download online (web-based) videos.
#
# Copyright Michael Orlitzky
#
# http://michael.orlitzky.com/
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# http://www.fsf.org/licensing/licenses/gpl.html
#

# All of the website classes are located in one
# directory, so we can 'require' them automatically.
Dir.glob('src/websites/*.rb').each do |r|
  require r
end


# Only actually do something if this script was called
# directly (i.e. not from the tests).
if (__FILE__ == $0) then
  if (ARGV.length < 1) then
    # If the user didn't give us a URL, yell
    # at him or her.
    puts 'Usage: whatever-dl <url>'
    Kernel.exit(1)
  end

  # Check the URL against each website's class.
  # The class will know whether or not the URL
  # "belongs" to its website.

  site = nil
  
  Website.subclasses.each do |w|
    if w.owns_url?(ARGV[0])
      site = w.new()
      break
    end
  end

  if site.nil?
    puts 'Invalid URL.'
    exit(1)
  end
  
  video_url = site.get_video_url(ARGV[0])

  if video_url.nil?
    puts 'Error retrieving video URL.'
    exit(2)
  end

  # *classy*
  Kernel.exec("wget \"#{video_url}\"")
end