/home/$USER/bin/mp

#!/bin/bash
#mpd/mpc manager for non root users of mpd + mpc
#v0.3
#built heavily from the init.d script 'mpd'
#@depends mpd, mpc
#Matlock


#check to see if user has setup the placement of their config file, if not
#prompt to do so
if [ ! -f /home/$USER/.mpdconffile ]; then
  echo "Please enter path to mpd config file (example /home/$USER/.mpdconf)"
  read -p ">$" mpdconfpath
  echo $mpdconfpath > /home/$USER/.mpdconffile
else
  mpdconfpath="`cat /home/$USER/.mpdconffile`"
fi

#this gobbledegook specifies magic things
dbfile=$(sed -n 's/^[[:space:]]*db_file[[:space:]]*"\?\([^"]*\)\"\?/\1/p' $mpdconfpath)
pidfile=$(sed -n 's/^[[:space:]]*pid_file[[:space:]]*"\?\([^"]*\)\"\?/\1/p' $mpdconfpath)


#Begin function block

#return PID of process if running
function mpd_pid {
  if [ -f /home/$USER/.mpd/pid ]; then
    pid=`cat /home/$USER/.mpd/pid`
  else
    pid=`ps aux |grep mpd |grep -v grep |grep -v man |grep -v pts |tr -s [:space:] |cut -d' ' -f2`
  fi
}

#start the daemon
function start_mpd {
  echo -n "Now starting mpd..."
  if [ "$FORCE_CREATE_DB" ]; then
    mv $dbfile $dbfile-old
  fi
  mpd
  sleep 2
  mpd_pid
  echo "mpd started with pid $pid"
}

#attempt to stop the daemon normally if it refuses, sigterm
function stop_mpd {
  mpd_pid
  echo -n "Now killing mpd process $pid..."
  mpd --kill
  sleep 1
  if [ "`ps aux |grep $pid |grep -v grep`" ]; then
    echo -n "it didn't die normally, now executing..."
    kill -9 $pid
  fi
  echo "mpd should be dead."
  sleep 1
}

function update {
  mpc update >> /dev/null
  echo "Now updating database, if mpd stalls, please issue $0 restart"
}

function playlist {
  clear
  echo 'Available Playlists:'
  declare -a array
  IN=`mpc lsplaylists`
  set -- "$IN"
  IFS=$'\n'; declare -a array=($*)
  j=0
  for i in "${array[@]}"; do
    echo $(($j+1))": "${array[$j]}
    let " j = $j + 1"
  done


  echo ------------------------------
  echo -n "Plese enter your selection and press enter (1-"$(($j))"): "
  read confirm
  if [ $confirm -gt $j ] || [[ ! $confirm = *[[:digit:]]* ]]; then
    exit 1
  else
    selection=${array[$(($confirm-1))]}
    echo "Now replacing playlist, if mpd stalls, press $0 restart"
    mpc clear >> /dev/null
    mpc load "$selection" >> /dev/null
    mpc play >> /dev/null
    sleep 3
    np
  fi
}
#End function block


#here is where the actual parameters that are passed are evaluated.
case "$1" in
    start)
        start_mpd
        ;;
    stop)
        stop_mpd
        ;;
    restart)
        stop_mpd
        start_mpd
        ;;
    create-db)
        FORCE_CREATE_DB=1
        start_mpd
        ;;
    pid)
        mpd_pid
        echo "mpd process id is $pid"
        ;;
    update)
        update
        ;;
    playlist)
        playlist
        ;;
    *)
        echo "Usage: $0 {create-db|update|start|stop|restart|playlist|pid}"
        exit 2
        ;;
esac