#!/bin/bash
# By Linc 10/1/2004
# Find the latest script at http://linc.homeunix.org:8080/scripts/bashpodder
# Last revision 07/01/2005 - Many Contributers!
# If you use this and have made improvements or have comments
# drop me an email at linc dot fessenden at gmail dot com
# I'd appreciate it!

# Revision on 07/03/2005 By Travis Nickles
# BashPodder now checks the filename of a desinated download, not the full url,
# to determine whether a file has been previously downloaded.
# This will help avoid problems with feeds with updates mirrors, like LugRadio,
# so BashPodder does not download a previously downloaded file again, 
# but this will cause a problem when different files use the same filename.
# The full url is still stored in the podcast.log file.

# Make script crontab friendly:
cd $(dirname $0)

# datadir is the directory you want podcasts saved to:
datadir=$(date +%Y-%m-%d)

# Check for and create datadir if necessary:
if test ! -d $datadir
        then
        mkdir $datadir
fi

# Delete any temp file:
rm -f temp.log

# Read the bp.conf file and wget any url not already in the podcast.log file:
while read podcast
	do
	file=$(wget -q $podcast -O - | xsltproc parse_enclosure.xsl - 2> /dev/null) || file=$(wget -q $podcast -O - | tr '\r' '\n' | tr \' \" | sed -n 's/.*enclosure.*url="\([^"]*\)".*/\1/p')
	for url in $file
		do
                filename=$(echo $url | sed -n 's\.*/\\p')
		if ! grep "$filename" podcast.log > /dev/null
			then
			wget -q -P $datadir "$url" && echo $url >> temp.log
		fi
		done
	done < bp.conf
# Move dynamically created log file to permanent log file:
cat podcast.log >> temp.log
sort temp.log | uniq > podcast.log
rm temp.log
# Create an m3u playlist:
ls $datadir | grep -v m3u > $datadir/podcast.m3u

# Discard empty podcast files / data directories (Contributer Paul Laws)
# http://linc.homeunix.org:8080/scripts/bashpodder/user_contributed/paul_laws/
[ -s $datadir/podcast.m3u ] || rm $datadir/podcast.m3u
rmdir $datadir 2>/dev/null