#!/bin/bash
# By Linc 10/1/2004
# Find the original script at http://linc.homeunix.org:8080/scripts/bashpodder
# 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!

# Added various functionality 03/2005 B. O'Steen
# The file continuing is a little bit beta....
# ben at maysubdivide dot org

# for the crontab
cd $(dirname $0)

# Possible directorys to store the podcasts. Will use
# the first valid directory.
# (For those who sometimes store their 'casts straight
# to their player, but not always.)
datadirs="/media/removeable/podcasts /mnt/usb/podcasts /music/podcasts"

datadir="placeholder"

# All mp3's are downloaded one at a time to $tmpdir and then moved. 
# They are moved as soon as they have been downloaded however.
# This cuts down on the amount of writing to a portable player, 
# as they don't seem to be fond of repeated additions to files... 
#			especially flash players. 
# This is IMO that is. My iRiver does burn less battery power when connected up in this way.
tmpdir="/tmp"

dateum=$(date +%F)

#Appended -c flag to wget. Turn this to 1 to not attempt a download if a file with the same name is found.
overwritefiles=0

#defaults: Don't stream, update log and try to continue files that have been logged as downloaded or exist in the target directory.

# NB Sorry that I have used counter intuitive truths.... (I was thinking about return codes at the time, 'exit 0')
# 0 - True
# 1 - False

streamxmms=1
updatelog=0
ignorelog=1
retainnames=0

#Verbose?
verbose=1

for args in $@
do
	if test -d $args
		then
		datadirs=$args
	else
		case $args in
			# Create m3u list and pass it to xmms. Do not log the files
			"-stream" | "-Stream" | "-STREAM" | "-s" | "-S" )
			streamxmms=0
			updatelog=1
			;;
			# Update log file. Useful with xmms streaming if you want to not
			# download the same file you just heard.
			"-log" | "-Log" | "-LOG" | "-l" | "-L" )
			updatelog=0
			;;
			#Update log file and create a stream m3u for xmms
			"-logStream" | "-logstream" | "-streamlog" | "-streamLog" | "-STREAMLOG" | "-sl" | "-SL" | "-ls" | "-LS" )
			streamxmms=0
			updatelog=0
			;;
			# A bit of an outdated flag feature.... might remove this soon.
			"-continuelog" | "-CONTINUELOG" | "-continue" | "-CONTINUE" | "-c" | "-C" )
			# Was caught short running this program last time, so update log first with
			# And then carry on
			if test -e temp.log 
				then
				cat ~/podcast.log >> $tmpdir/temp.log
				sort $tmpdir/temp.log | uniq > ~/podcast.log
			fi
			;;
			
			# ignore the log file and look at all valid urls in the rss feeds
			"-ignore" | "-IGNORE" | "-ignorelog" | "-IGNORELOG" )
				ignorelog=0
			;;

			# keep the urls in the filenames of the files downloaded. Useful if your bp.conf goes bang
			"-k" | "-K" | "-keepurls" )
				retainnames=1
			;;
			
			#Verbose?
			"-v" | "-V" | "-verbose" )
				verbose=0
			;;
			
			# Show help dialog
			"-h" | "-H" | "--h" | "--H" | "-help" | "-HELP" | "--help" | "--HELP" )
				echo "Podding tool. Can download and stream rss pocasts"
				echo ""
				echo "Usage:"
				echo ""
				echo "-stream (-s)"
				echo "	Create m3u list and pass it to xmms."
				echo "	(Doesnt log which files.)"
				echo "-keepurls (-k)"
				echo "	Compact the url and use this as the filename instead."
				echo "	Useful for keeping tabs on which 'cast came from where"
				echo "	without having to listen to it or checking its id3 tag"
				echo "-logstream (-ls)"
				echo "	Create m3u list and pass it to xmms."
				echo "	Does log which files."
				echo "-log (-l)"
				echo "	Update log at end of operation."
				echo "-continuelog (-c)"
				echo "	Continue with temp log if bashpodder"
				echo "	was halted midway"
				echo "-ignorelog"
				echo "	Ignores the log and downloads all files"
				echo "	that do not exist in target directory"
				echo "-verbose (-v)"
				echo "	Echo which feeds are being checked and"
				echo "	downloaded"
				echo "-help (-h)"
				echo "	Shows this dialog"
				echo "---------"
				echo "/place/my/feeds/here"
				echo "	Pass a directory to have the feeds downloaded"
				echo "	there. Useful with -ignorelog to create a"
				echo "	snapshot of the feeds"
				exit 0
			;;
		esac
	fi
done


# Check for datadir if not streaming:
if [ $streamxmms -eq 1 ]
	then
	for rsslocation in $datadirs; do
	if test -d $rsslocation
	        then
		datadir=$rsslocation
		if test ! -d $datadir/$dateum
			then
			mkdir $datadir/$dateum
		fi
		if [ $verbose -eq 0 ]
			then
			echo "Feed placed in $datadir"
		fi
		break 2
	fi
	done
	
	if [[ $datadir = "placeholder" ]]
		then
		echo "No valid location available. Edit the datadirs"
		echo "variable in the script to suit your system"
		echo "datadirs is currently $datadirs"
		echo "Alternatively, you can pass a valid directory on the command line"
		echo ""
		echo "	[user@localhost]$ rsspodder /mnt/usb/podcasts"
		echo ""
		echo "for example."
		exit 65
	fi
fi

# Delete any temp file:
rm -f $tmpdir/temp.log
rm -f $tmpdir/tempm3u.m3u

# Go through the podcasts in bp.conf, ignoring those with a '#' at the beginning
grep -v "^#" ~/bp.conf > $tmpdir/filtered.feeds

while read podcast
do

if [ $verbose -eq 0 ]
	then
	echo "Checking $podcast"
fi

file=$(wget -q $podcast -O - | tr '\r' '\n' | tr \' \" | sed -n 's/.*url="\([^"]*\)".*/\1/p')
for url in $file
	do
	# Consult log?
	ignore=0
	if [ $ignorelog -eq 1 ]
		then
		if grep "$url" ~/podcast.log > /dev/null 
			then
			ignore=1
		fi
	fi

	if [ $ignore -eq 0 ]
		then
		
		#Does the file exist already and if so, should it be overwritten?
		downloadthisurl=1
		filenametocheck=""
		if [ $retainnames -eq 1 ]
			then
			sanitised=`echo ${url/%".mp3"/} | tr -d / | tr -d \: | tr -d .`
			filenametocheck=$sanitised.mp3
			else
			t=${url%/}
			filenametocheck=${t##*/}
		fi
		
		verboseAddition=""
		
		if test -e $datadir/$dateum/$filenametocheck
			then
			if [ $overwritefiles -eq 0 ]
				then
				downloadthisurl=0
				verboseAddition=" - file found. Trying to continue."
			else
				downloadthisurl=1
			fi
		else
			downloadthisurl=0
		fi
		finalfilename=""
		if [ $downloadthisurl -eq 0 ]
			then
			if [ $streamxmms -eq 1 ]
				then
				if [ $verbose -eq 0 ]
					then
					echo $verboseAddition
					wget -c "$url" -P $tmpdir
					else
					wget -q -c "$url" -P $tmpdir
				fi
				if [ $retainnames -eq 1 ]
					then
					t=${url%/}
					savedfilename=${t##*/}
					sanitised=`echo ${url/%".mp3"/} | tr -d / | tr -d \: | tr -d .`
					finalfilename=$sanitised.mp3
					mv $tmpdir/$savedfilename $datadir/$dateum/$finalfilename
				else
					t=${url%/}
					finalfilename=${t##*/}
					mv $tmpdir/$finalfilename $datadir/$dateum/$finalfilename
				fi
			else
				echo "$url" >> $tmpdir/tempm3u.m3u
			fi
		fi
		
		# update log?
		if [ $updatelog -eq 0 ]
			then
			echo $url >> $tmpdir/temp.log
		fi
	fi
	done
done < $tmpdir/filtered.feeds

# Update the logfile?
if [ $updatelog -eq 0 ]
	then
	cat ~/podcast.log >> $tmpdir/temp.log
	sort $tmpdir/temp.log | uniq > ~/podcast.log
fi

if [ $streamxmms -eq 0 ]
	then
	#send it to 
	xmms $tmpdir/tempm3u.m3u &
fi

#Clean up temporary files
rm -f $tmpdir/filtered.feeds
rm -f $tmpdir/temp.mp3

exit 0