#! /usr/bin/env python

# Find podcasts recently downloaded by podget --
# everything up to the second-to-the-latest .m3u file.
# Copy the new files to an mp3 player.
# Copyright 2011 by Akkana, feel free to use or adapt under the GPLv2.

import os, time, shutil

new_podcast_dir = os.path.expanduser("~/POD")
player_dir = "/mp3"

class PodcastFile :
    """A podcast .mp3 file with its last-modified date"""
    def __init__(self, path) :
        self.pathname = path
        self.mtime = os.path.getmtime(path)

    def __str__(self) :
        return os.path.basename(self.pathname) + "\t [" + \
            time.strftime("%b %d %H:%M:%S %Y", time.localtime(self.mtime)) \
            + "]"

    def __lt__(self, other) :
        return self.mtime < other.mtime

    def __gt__(self, other) :
        return self.mtime > other.mtime

    def filename(self) :
        return os.path.basename(self.pathname)

def find_podcasts(dir) :
    """Return a list of PodcastFiles in dir --
       but only up to the second file that starts with "New".
    """
    podcasts = []
    cmd = "find %s -type f" % dir
    fp = os.popen(cmd)
    for file in fp :
        file = file.strip()
        if file.endswith(".mp3") or file.endswith(".m3u")  :
            podcasts.append(PodcastFile(file))
    fp.close()

    # Now podcasts is a list of all PodcastFiles. Sort by date:
    podcasts.sort()

    # If the last entry is an m3u, delete it:
    # podget creates a .m3u AFTER each set, so it's newer than
    # any of the downloaded files.
    if podcasts[-1].pathname.endswith(".m3u") :
        podcasts.pop(-1)
        #podcasts = podcasts[:-1]

    # Now find the previous most recent (latest in the list) .m3u file:
    # loop backward from the end of the list.
    for i in range(len(podcasts)-1, -1, -1) :
        if podcasts[i].pathname.endswith(".m3u") :
            print "Stopping at", podcasts[i]
            return podcasts[i+1:]

    return podcasts

if __name__ == '__main__' :
    podcasts = find_podcasts(new_podcast_dir)
    for podcast in podcasts :
        new_pathname = os.path.join(player_dir, podcast.filename())
        if os.path.exists(new_pathname) :
            print "Oops!", new_pathname, "already exists!"
        else :
            #print "cp %s %s" % (podcast.pathname, new_pathname)
            shutil.copy2(podcast.pathname, new_pathname)
            print "Copied", podcast