# Youtube Favorites Downloader
# By Christopher Genetti (10-5-2009)
#
# Would you like to automatically download all your favorite videos on youtube to your computer? You are in luck, 
# because this script will do just that! You need:
# 
# - Python (tested with 2.6, don't know how well it'll work in older or newer versions) - Python.org
# - Youtube-dl - http://bitbucket.org/rg3/youtube-dl/
# - Feedparser - http://feedparser.org
# 
# It's only been tested on Mac OS 10.5.8, but should work on anything that runs python and the above two libraries.
# 
# Run this script like so:
# 
# python ytdl.py -u (username) -n (total number of videos to return) -s (number of the video to start at)
# 
# It will then download all videos in the specified user's favorites up to the number provided (starting from the most recent) 
# into the same folder that ytdl.py is being run from.
# 
# ytdl.py is probably really buggy and inefficient and terrible code. I'm not an expert Python programmer, but I do know 
# that this script has worked for me! If you have any issues, suggestions, or well-wishings, forward them to genettic@gmail.com, thanks.

import feedparser
from subprocess import *
import optparse
import time

parser = optparse.OptionParser(
	usage='Usage: %prog [options] url...',
	version='INTERNAL',
	conflict_handler='resolve',
)

parser.add_option('-u', '--username', dest='username', metavar='USERNAME', help='username to query')
parser.add_option('-n', '--number', dest='number', metavar='NUMBER', help='number of results')
parser.add_option('-s', '--start', dest='start', metavar='START', help='the number of the video to start at')

(options, args) = parser.parse_args()

if options.username is None:
	print 'You need to specify a username!'
	exit()

start = options.start or 1
start = int(start)
max_results = options.number or 25
max_results = int(max_results)

while max_results > 0:

	if max_results > 50:
		num_results = 50
	else:
		num_results = max_results
		
	feed_url = r'http://gdata.youtube.com/feeds/api/users/'+str(options.username)+'/favorites?max-results='+str(num_results)+'&start-index='+str(start)+'&alt=rss'
	d = feedparser.parse(feed_url)
	
	if max_results < 50:		
		max_results = 0
	else:
		max_results = int(max_results) - 50
		start = int(start) + 50

	for video in d.entries:
		p = Popen(['youtube-dl', str(video['link']), '-t'])
		while p.poll() is None:
			time.sleep(1)