#!/bin/bash
PATH=/usr/local/bin:/usr/bin:/usr/local/sbin:/usr/sbin:/bin:/sbin
RTFILE=/usr/local/bin/rt
home="/home/$SUDO_USER"

installed() {
hash $1 2>/dev/null
}

get_scripts() {
local script_name=$1
local script_dest=$2
local no_err=1
local attempts=0
until [ $no_err = 0 ]
  do
    rm -f $script_name
    wget --no-check-certificate https://raw.githubusercontent.com/arakasi72/rtinst/master/$script_name
    no_err=$?
    attempts=$(( $attempts + 1 ))
    if [ $attempts = 20 ]; then
      echo "There is a problem downloading the scripts. Please check your network or there may be an issue with the github website"
      echo "If the Github website is down, you can try again later"
      exit 1
    fi
  done

if ! [ -z "$script_dest" ]; then
  mv -f $script_name $script_dest
fi
}

ask_version() {
    while true
      do
      echo "Select version to upgrade/downgrade to"
      echo "1. libtorrent 0.13.2/rtorrent 0.9.2"
      echo "2. libtorrent 0.13.3/rtorrent 0.9.3"
      echo "3. libtorrent 0.13.4/rtorrent 0.9.4"
      echo "4. libtorrent 0.13.6/rtorrent 0.9.6"
      echo "5. Quit"
      read -p "Select an option " answer
      case $answer in [1] ) libvers="libtorrent-0.13.2" && rtvers="rtorrent-0.9.2" && return 0 ;;
                      [2] ) libvers="libtorrent-0.13.3" && rtvers="rtorrent-0.9.3" && return 0 ;;
                      [3] ) libvers="libtorrent-0.13.4" && rtvers="rtorrent-0.9.4" && return 0 ;;
                      [4] ) libvers="libtorrent-0.13.6" && rtvers="rtorrent-0.9.6" && return 0 ;;
                      [5] ) exit ;;
                          * ) echo "Enter 1-5";;
      esac
    done
}

confirm_answer() {
while true
      do
      read -p "Sure you wish to install $libvers/$rtvers? " answer
      case $answer in [Yy]* ) return 0 ;;
                      [Nn]* ) exit ;;
                          * ) echo "Enter y or n";;
      esac
    done

}

if [ -z "$SUDO_USER" -o "$SUDO_USER" = "root" ]; then
  echo "Must be run using sudo"
  exit
fi

if ( installed rtorrent ); then
  echo "rtorrent detected"
  echo
else
  echo "rtorrent NOT installed"
  echo "This script is for upgrading/downgrading only, not for initial install"
  exit 1
fi


ask_version
confirm_answer

echo
echo "Installing $libvers/$rtvers"

if ! [ -x $RTFILE ]; then
  get_scripts rt /usr/local/bin/rt
fi

cd $home
if [ -d source ]; then
  cd source
else
  mkdir source && cd source
fi
rm -r libtorrent* rtorrent*

echo "Fetching source files"
curl -# http://rtorrent.net/downloads/$libvers.tar.gz | tar xz
curl -# http://rtorrent.net/downloads/$rtvers.tar.gz | tar xz

echo "Compiling libtorrent"
cd $home/source/$libvers
./autogen.sh >> /dev/null 2>&1
./configure --prefix=/usr >> /dev/null 2>&1
make -j2 >> /dev/null 2>&1
make install >> /dev/null 2>&1

echo "Compiling rtorrent"
cd $home/source/$rtvers
./autogen.sh >> /dev/null 2>&1
./configure --prefix=/usr --with-xmlrpc-c >> /dev/null 2>&1
make -j2 >> /dev/null 2>&1
make install >> /dev/null 2>&1
ldconfig

cd /var/www/rutorrent/conf/users
user_list=*

for user in $user_list
  do
    echo "Restarting rtorrent for $user"
    su $user -c 'rt restart >> /dev/null 2>&1'
  done

cd $home

echo
echo "$libvers/$rtvers installed"
echo
echo "Your .rtorrent.rc file, and download, watch, and .session directories have not been altered in any way"