#!/bin/bash

# checking dependencies
if [[ $(aptitude search ffmpeg | grep multimedia | awk '{print $1}') = "i" && $(aptitude search lame | grep frontend | awk '{print $1}') = "i" && $(aptitude search curl | grep "Get a file" | awk '{print $1}') = "i" ]]; then
    echo "info: everything found"
else
    if [ $(whoami) = "root" ]; then
        echo "info: trying to insall missing dependencies"
        apt-get install -y ffmpeg curl lame
    else
        echo "error: permission denied"
        echo "info: install dependencies or run this scrip as superuser"
        exit 1
    fi
fi

# skip read if link is already first option
if [ -z $1 ]; then
    echo "Insert YouTube Link here:"
    read link
else
    link=$1
fi

# getting filename
file=$(ls -l /tmp | grep Flash | awk '{print $8}')
secondfile=$(echo $file | awk '{print $2}')

if [ -z "$file" ]; then
    echo "info: there is no open youtube window, starting chromium"
    chromium-browser $link
    sleep 6
    file=$(ls -l /tmp | grep Flash | awk '{print $8}')
    secondfile=$(echo $file | awk '{print $2}')
fi

# checking if there is a second flash file in /tmp
if [ -z $secondfile ]; then
    i="doitagain"
    oldsize="0"
    while [ $i = "doitagain" ]; do
        size=$(ls -l /tmp | grep $file | awk '{print $5}')
        if [ $size -gt $oldsize ];then
            echo "info: download not finished yet. waiting 5 seconds.."
            oldsize=$size
            sleep 5 
        else
            echo "info: download finished."
            i="goforit"
        fi
    done
else
    echo "error: there should just be one open video window"
    exit 1
fi

# parse link for title
curl "$link" --output tmp.txt
rawtitle=$(cat tmp.txt | grep 'meta name="title"')
rm tmp.txt
count=${#rawtitle}
length=$(($count-36))
title=${rawtitle:34:$length}

echo
echo "Parsed videotitle = $title"
echo

# here starts the actual convertion
echo "starting convertion of $title @ $link"

ffmpeg -i /tmp/$file -vn temp.wav
lame --preset 128 temp.wav "$title.mp3"
rm temp.wav

wd=$(pwd)
echo
echo "you will find the just created file in $wd"
echo "filename = $title.mp3"

exit 0