#!/bin/bash
# /etc/init.d/minecraft
# version 0.3.2 2011-01-27 (YYYY-MM-DD)
 
  ### BEGIN INIT INFO
  # Provides:   minecraft
  # Required-Start: $local_fs $remote_fs
  # Required-Stop:  $local_fs $remote_fs
  # Should-Start:   $network
  # Should-Stop:    $network
  # Default-Start:  2 3 4 5
  # Default-Stop:   0 1 6
  # Short-Description:    Minecraft server
  # Description:    Starts the minecraft server
  ### END INIT INFO
 
#Settings
SERVICE='craftbukkit-0.0.1-SNAPSHOT.jar'
USERNAME="mine"
MCPATH='/home/mine/mcone'
INVOCATION='java -Xmx1024M -Xms1024M -jar craftbukkit-0.0.1-SNAPSHOT.jar nogui'
BACKUPPATH='/home/mine/backup'
 
ME=`whoami`
as_user() {
  if [ "$ME" ===== "$USERNAME" ] ; then
    bash -c "$1"
  else
    su - $USERNAME -c "$1"
  fi
}
 
mc_start() {
  if ps ax | grep -v grep | grep -v -i SCREEN | grep $SERVICE > /dev/null
  then
    echo "Tried to start but $SERVICE was already running!"
  else
    echo "$SERVICE was not running... starting."
    cd $MCPATH
    as_user "cd $MCPATH && screen -dmS minecraft $INVOCATION"
    sleep 7
    if ps ax | grep -v grep | grep -v -i SCREEN | grep $SERVICE > /dev/null
    then
      echo "$SERVICE is now running."
    else
      echo "Could not start $SERVICE."
    fi
  fi
}
 
mc_saveoff() {
        if ps ax | grep -v grep | grep -v -i SCREEN | grep $SERVICE > /dev/null
	then
		echo "$SERVICE is running... suspending saves"
		as_user "screen -p 0 -S minecraft -X eval 'stuff \"say SERVER BACKUP STARTING. Server going readonly...\"\015'"
                as_user "screen -p 0 -S minecraft -X eval 'stuff \"save-off\"\015'"
                as_user "screen -p 0 -S minecraft -X eval 'stuff \"save-all\"\015'"
                sync
		sleep 10
	else
                echo "$SERVICE was not running. Not suspending saves."
	fi
}
 
mc_saveon() {
        if ps ax | grep -v grep | grep -v -i SCREEN | grep $SERVICE > /dev/null
	then
		echo "$SERVICE is running... re-enabling saves"
                as_user "screen -p 0 -S minecraft -X eval 'stuff \"save-on\"\015'"
                as_user "screen -p 0 -S minecraft -X eval 'stuff \"say SERVER BACKUP ENDED. Server going read-write...\"\015'"
	else
                echo "$SERVICE was not running. Not resuming saves."
	fi
}
 
mc_stop() {
        if ps ax | grep -v grep | grep -v -i SCREEN | grep $SERVICE > /dev/null
        then
                echo "$SERVICE is running... stopping."
                as_user "screen -p 0 -S minecraft -X eval 'stuff \"say SERVER SHUTTING DOWN IN 30 SECONDS. Saving map...\"\015'"
                as_user "screen -p 0 -S minecraft -X eval 'stuff \"save-all\"\015'"
                sleep 30
                as_user "screen -p 0 -S minecraft -X eval 'stuff \"stop\"\015'"
                sleep 7
        else
                echo "$SERVICE was not running."
        fi
        if ps ax | grep -v grep | grep -v -i SCREEN | grep $SERVICE > /dev/null
        then
                echo "$SERVICE could not be shut down... still running."
        else
                echo "$SERVICE is shut down."
        fi
}
 
 
mc_update() {
  if ps ax | grep -v grep | grep -v -i SCREEN | grep $SERVICE > /dev/null
  then
    echo "$SERVICE is running! Will not start update."
  else
    MC_SERVER_URL=http://minecraft.net/`wget -q -O - http://www.minecraft.net/download.jsp | grep minecraft_server.jar\</a\> | cut -d \" -f 2`
    as_user "cd $MCPATH && wget -q -O $MCPATH/minecraft_server.jar.update $MC_SERVER_URL"
    if [ -f $MCPATH/minecraft_server.jar.update ]
    then
      as_user "mv $MCPATH/minecraft_server.jar.update $MCPATH/minecraft_server.jar"
      echo "Minecraft successfully updated."
    else
      echo "Minecraft update could not be downloaded."
    fi
  fi
}
 
mc_backup() {
  if ps ax | grep -v grep | grep -v -i SCREEN | grep $SERVICE > /dev/null
  then
#    echo "$SERVICE is running! Will not start backup."
#  else
    echo "Backing up minecraft data"
    if [ -d $BACKUPPATH/world_`date "+%m.%d.%Y"` ]
    then
      for i in 1 2 3 4 5 6
      do
        if [ -d $BACKUPPATH/world_`date "+%m.%d.%Y"`-$i ]
        then
          continue
        else
          as_user "cd $MCPATH && cp -r world $BACKUPPATH/world_`date "+%m.%d.%Y"`-$i"
          break
        fi
      done
    else
      as_user "cd $MCPATH && cp -r world $BACKUPPATH/world_`date "+%m.%d.%Y"`"
    fi
    echo "Backing up the minecraft server executable"
    if [ -f "$BACKUPPATH/minecraft_server_`date "+%m.%d.%Y"`.jar" ]
    then
      for i in 1 2 3 4 5 6
      do
        if [ -f "$BACKUPPATH/minecraft_server_`date "+%m.%d.%Y"`-$i.jar" ]
        then
          continue
        else
          as_user "cd $MCPATH && cp minecraft_server.jar \"$BACKUPPATH/minecraft_server_`date "+%m.%d.%Y"`-$i.jar\""
          break
        fi
      done
    else
      as_user "cd $MCPATH && cp minecraft_server.jar \"$BACKUPPATH/minecraft_server_`date "+%m.%d.%Y"`.jar\""
    fi
  fi
  echo "Backup complete"
}
 
 
#Start-Stop here
case "$1" in
  start)
    mc_start
    ;;
  stop)
    mc_stop
    ;;
  restart)
    mc_stop
    mc_start
    ;;
  update)
    mc_stop
    mc_backup
    mc_update
    mc_start
    ;;
  backup)
    mc_saveoff
    mc_backup
    mc_saveon
    ;;
  status)
    if ps ax | grep -v grep | grep -v -i SCREEN | grep $SERVICE > /dev/null
    then
      echo "$SERVICE is running."
    else
      echo "$SERVICE is not running."
    fi
    ;;
 
  *)
  echo "Usage: /etc/init.d/minecraft {start|stop|update|backup|status|restart}"
  exit 1
  ;;
esac
 
exit 0

# m h  dom mon dow   command
*/5 * * * * bash /home/mine/save_world.sh & >>  /home/mine/mc.log
52 */6 * * * bash /etc/init.d/minecraft restart >> /home/mine/mc.log
32 */24 * * * bash /etc/init.d/minecraft fullbackup >> /home/mine/mc.log
*/9 * * * * bash /etc/init.d/minecraft saveall