#!/bin/bash

#####################################################
# Podcatcher Script
#
# you must first make a text file in the same directory
# that contains the feeds and name the text file podlist.txt
# 
# Made By : Ibrahim Riad
#####################################################

#####################################################
# Declaring variables
#####################################################

main_directory="$HOME/Podcast"
podcast_directory="$main_directory/podcasts"
download_directory="$main_directory/shows"
archive_directory="$main_directory/archive"

#!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
#NOTE: Dont put the history file in the podcast_directory
#or the download_directory as it will be deleted
#!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

history="$main_directory/downloaded_history.txt"
podcast_number="3"
alarm="/usr/lib/openoffice/share/gallery/sounds/applause.wav"
multimedia_player="xmms"
stream_player="kaffeine"

function clean_up {

	# Perform program exit housekeeping

        echo ""
	echo ""
	echo -e "\033[0;31mThe script was exited unexpectatly\033[0m"
	echo ""
	echo -e "\033[0;31mTemp files removed\033[0m"
	echo ""
	sleep 1
	rm "$podcast_directory"/* 2>/dev/null
	exit
}

trap clean_up SIGHUP SIGINT SIGTERM

#<--------------------------------------------------->

#####################################################
# Specifying options
#####################################################

while [ "$1" != "" ];do
   case $1 in
             -n|--podcast_number ) podcast_number="$2"
	                 ;;
             -c|--clean ) rm "$download_directory"/* 2>/dev/null
	                rm "$podcast_directory"/* 2>/dev/null
			echo -e "\033[0;31mDirectory Cleaned\033[0m"
			exit
                         ;;
	     -a|--archive ) if [ ! -d "$archive_directory" ];then
				echo -e "\033[0;32mMaking archive directory\033[0m"
				echo ""
				mkdir "$archive_directory"
			fi
			cp "$download_directory"/*.mp3 "$archive_directory" 2>/dev/null
			cp "$download_directory"/*.ogg "$archive_directory" 2>/dev/null
			echo -e "\033[0;31mPodcasts archived\033[0m"
			exit
                         ;;
	     -p|--play ) $multimedia_player "$download_directory/latest.m3u" &
			exit
			;;
	     -d|--download ) download="y"
                        ;;
	     -h|--help ) echo "
Usage: $0 [OPTIONS]

Options are:
        -n, --podcast_number            Specify the number of podcast per each stream to be downloaded
        -c, --clean                     Delete the podcasts and playlist
        -p, --play                      Play the playlist
        -d, --download                  Downloads aoutomatically new podcasts
        -h, --help                      Display this text and exit

Examples:
        $0 -n 1                         Will download the latest podcasts
        $0 -n 1 -d                      Will download the latest podcasts without confirmation
"
                            exit
                         ;;
   esac
   shift
done

#<--------------------------------------------------->

clear

#####################################################
# Checking directories
#####################################################

echo "#################################"
echo "# Checking directories"
echo "#################################"
echo ""

if [ -d "$main_directory" ];then
	echo -e "\033[0;32mMain directory exists\033[0m"
	echo ""
else
	echo -e "\033[0;32mMaking main directory\033[0m"
	echo ""
	mkdir "$main_directory"
fi

if [ -d "$podcast_directory" ];then
	echo -e "\033[0;32mPodcast directory exists\033[0m"
	echo ""
else
	echo -e "\033[0;32mMaking podcast directory\033[0m"
	echo ""
	mkdir "$podcast_directory"
fi

if [ -d "$download_directory" ];then
	echo -e "\033[0;32mDownload directory exists\033[0m"
	echo ""
else
	echo -e "\033[0;32mMaking download directory\033[0m"
	echo ""
	mkdir "$download_directory"
fi

#<--------------------------------------------------->

#####################################################
# Downloading feeds
#####################################################

echo "#################################"
echo "# Downloading feeds"
echo "#################################"
echo ""

if [ ! -f "$main_directory/podlist.txt" ];then
    echo -e "\033[0;31mFile podlist.txt doesnt exists\033[0m"
    echo ""
    echo -n "Create one ? (y/n) : "
    read cpod
    echo ""
    if [ $cpod == "y" ];then
	touch "$main_directory/podlist.txt"
	echo "It's created but its empty now , you could check out

http://www.podcast.net/
http://www.podcastalley.com/

for some feeds"

	echo ""
	rm "$main_directory/lock"
	exit
    else
	rm "$main_directory/lock"
	exit
    fi
fi

if [ ! -s "$main_directory/podlist.txt" ];then
	echo "The podlist.txt file is empty , you could check out

http://www.podcast.net/
http://www.podcastalley.com/

for some feeds"

	echo ""
	rm "$main_directory/lock"
	exit
fi

echo ""

for i in `cat "$main_directory/podlist.txt"`
do
    echo -e "\033[0;32mDownloading feed ....\033[0m"
    echo ""
    wget -t 2 -P "$podcast_directory" "$i"
done

#<--------------------------------------------------->

#####################################################
# Filter the feeds from the mp3 and ogg parts
#####################################################

cd "$podcast_directory"

for p in `ls`
do
    cat $p | grep audio/mpeg > $p.log
    cat $p | grep audio/ogg >> $p.log
done

#<--------------------------------------------------->

#####################################################
# Clean the output of the filter
#####################################################

for x in `ls *.log`
do
    cat "$x" | head -n $podcast_number | tr '\r' '\n' | tr \' \" | sed -n 's/.*url="\([^"]*\)".*/\1/p' >> final.txt
done

#<--------------------------------------------------->

clear

#####################################################
# Download the podcast and keep a history of it
#####################################################

echo "#################################"
echo "# Download or stream the podcast"
echo "#################################"
echo ""

for d in `cat final.txt`
do
    temp=$(cat "$history" | grep "$d") 2>/dev/null
    exists=$(echo $?)
    echo ""
    if [ $exists -eq 1 ];then
	
	if [ "$download" == "y"  ];then
           choise="d"
	else
           read -s -n1 -p "Download or Stream : $d (d/s/n) ? " choise
	fi
	
	echo ""
	if [ $choise == "d" ] || [ $choise == "D" ] || [ $choise == "y" ];then
	    echo -e "\033[0;32mDownloading : \033[0m" "$d"
	    echo ""
	    wget -c -P "$download_directory" "$d" && echo "$d" >> "$history" && cat "$alarm" > /dev/dsp
	elif [ $choise == "s" ] || [ $choise == "S" ];then
	    echo -e "\033[0;32mStreaming : \033[0m" "$d"
	    echo ""
	    echo "$d" >> "$history"
	    $stream_player "$d" &
	else
	    echo -e "\033[0;31mSkipping : \033[0m" "$d"
	    echo ""
	fi
     else
	echo -e "\033[0;31mYou already downloaded \033[0m" "$d"
	echo ""
	continue
     fi
done

#<--------------------------------------------------->

#####################################################
# Create an m3u playlist
#####################################################

ls -1rc "$download_directory" | grep -v m3u > "$download_directory/latest.m3u"

#<--------------------------------------------------->

#####################################################
# Cleanup
#####################################################

rm * 2>/dev/null


echo "#################################"
echo -e "#""\033[0;32m Done \033[0m"
echo "#################################"
echo ""