#!/bin/sh
# Created by Lehman Black - http://dosnlinux.wordpress.com

# podthingy - the podcatching thingy
# name suggestions welcome ;)

CWD=`pwd`

# TODO: make an "unlistened" folder
# TODO: integrate into SVN repo

# podcasts should be stored in separate folders under $PODCAST_ROOT
# each podcast directory should have a *.list and *.info file

# sample info file
#PODCAST="The Java Posse"
#TOPIC="Java news"
#HOMEPAGE="http://javaposse.com"
#FEED="http://feeds.feedburner.com/javaposse"
#LICENSE="Creative Commons"
#ALBUM="The Java Posse"
#ARTIST="Tor Norbye, Carl Quinn, Joe Nuxoll, Dick Wall"
#GENRE="Podcast"
# end info file

PODCAST_ROOT=$HOME

# make sure it works on folders only
for PODCAST in $PODCAST_ROOT/*/ 
do
	if ! [ -f $PODCAST/*.info ]
	then
		# skip if this is not a podcast directory
		continue
	fi

	INFO_FILE=$PODCAST/*.info
	LIST_FILE=$PODCAST/*.list

	PODNAME=`grep PODCAST $INFO_FILE | cut -d \" -f2`

	echo "Podcast: $PODNAME"
	echo

	# preserve origional *.list until everything's finished downloading
	TMP=`mktemp -t podcast.XXXXXX`
	cat $LIST_FILE > $TMP

	echo -e "\tScanning feed for new episodes..."
	echo

	FEED=`grep FEED $INFO_FILE | cut -d \" -f2`
	FEED_ITEMS=`wget -q -O - $FEED | \
				awk -F '<' '/url=/{print $NF}' | \
				grep 'url=' | \
				sed -e 's/.*url=\"//' \
					-e 's/\".*//'`
	NEW_ITEMS=""
	
	for NEW in $FEED_ITEMS
	do
		if ! ( grep -q $NEW $LIST_FILE )
		then
			echo -e "\tNEW: $NEW"
			NEW_ITEMS="$NEW_ITEMS $NEW"
		fi
	done

	# TODO count number of new episodes

	# skip if there are no podcasts to download
	if [ -z `echo $NEW_ITEMS | tr -d '[:space:]'` ]
	then
		echo "Podcast up to date"
		echo

		rm $TMP

		continue
	fi

	echo

	# download the new episodes
	for EPISODE in $NEW_ITEMS
	do
		echo -ne "\tDownloading $EPISODE... "

		wget --random-wait -q -c $EPISODE -P $PODCAST
		echo $EPISODE >> $TMP

		echo "Done."
	done

	# put the most recent podcast at the beginning -- hopefully
	echo -e "\tUpdating list file"
	sort -r $TMP > $LIST_FILE

	rm $TMP

	echo
	echo "Podcast up to date"
	echo
done