#! /usr/bin/env python
# -*- encoding: utf-8 -*-
# Generate MP3 playlists for Zixia music site 
# Copyright (c) 2004-2007 Pan Yongzhi http://pan.cdut.cn/izixia
#
# izixia 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 2 of
# the License, or (at your option) any later version.
# 
# izixia 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.
# 
# You should have received a copy of the GNU General Public License along
# with iZixia; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

import os.path
import sys

def escape(url):
    # some characters need to be escaped
    escape_table = {' ': '%20',
                    '#': '%23',
                    '%': '%25',
                    "'": '%27',}
    # some characters should not be escaped are {, }, ^, &...
    # so i cannot use urllib.quote
    for orig_char, escaped_char in escape_table.iteritems():
        url = url.replace(orig_char, escaped_char)
    return url

if len(sys.argv) != 2:
    print 'Usage: %s <lftp find output file>' % sys.argv[0]
    sys.exit()
# in lftp, use `find [dir] ... > all.lftp' to get this file
lftp_find_output = sys.argv[1]
# you may choose server = 'http://iris.trueice.net:8000/'
# or server = 'http://202.199.171.158:8000/ which is the ip
server = 'http://166.111.18.98:8000/'

for line in file(lftp_find_output, 'r'):
    # readlines appends \n to line end
    line = line.rstrip('\n')
    # if not mp3 file, skip it
    if not line.lower().endswith('.mp3'):
        continue
    dir_long = os.path.dirname(line)
    url = server + escape(line)
    # this assumes all.lftp is utf8 encoded
    url = url.decode('utf8').encode('gbk')
    # some file name contais :, using except so that izixia 
    # wont't stop here under windows
    if not os.path.exists(dir_long):
        try:
            os.makedirs(dir_long)
        except:
            pass
    single = line.replace('.mp3', '.m3u')
    # write magic bytes for m3u file
    # some file name contais ?, using except so that izixia 
    # wont't stop here under windows
    try:
        file(single, 'w').write('#EXTM3U\n%s' % url)
    except:
        pass

    dirlist = dir_long.split('/')
    while dirlist:
        dirname = '/'.join(dirlist)
        # to aviod name conflict between an album and a single song
        album_name = '__ALBUM__' + dirlist[-1] + '.m3u'
        # Every dir has an M3U file which contains all the
        # MP3's in this dir and its sub dirs
        m3ufile = os.path.join(dirname, album_name)
        if not os.path.exists(m3ufile):
            file(m3ufile, 'w').write('#EXTM3U\n')
        file(m3ufile, 'a').write('%s\n'%url)
        dirlist.pop()