#!/bin/bash
### BEGIN INIT INFO
# Provides: craftbukkit
# Required-Start: mountkernfs $local_fs $network
# Required-Stop: mountkernfs $local_fs $network
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: Craftbukkit Minecraft Server
# Description: Craftbukkit Minecraft Server
### END INIT INFO

# @TODO
# - Implement restart
# - Implement status

# Config START
USER="craftbukkit"
SRVPATH="/opt/craftbukkit"
WORLDPATH="/opt/craftbukkit/world/"
JAVAOPTS="-d64 -server -Xms1G -Xmx4G -XX:+UseG1GC -XX:+AggressiveOpts -XX:+UseFastAccessorMethods -XX:TargetSurvivorRatio=90 -XX:MaxGCPauseMillis=200 -XX:MaxPermSize=256m -Dlog4j.configurationFile=bukkit-log.xml"
JARNAME="craftbukkit.jar"
JAROPTS="--universe ${WORLDPATH}"
# Config END

# We want LSB functions here
. /lib/lsb/init-functions

case "$1" in
  start)
    if [ -z "$(pgrep -f -n $JARNAME)" ]; then
      log_daemon_msg "Starting Minecraft Server" "Craftbukkit"
      sudo -u ${USER} tmux new-session -d -s craftbukkit-console "cd ${SRVPATH}; java ${JAVAOPTS} -jar ${JARNAME}" >/dev/null 2>&1
      sleep 1
      if [ $? -gt 0 ]; then  # Tmux did not start
        log_failure_msg
        exit 1
      elif [ -z "$(pgrep -f -n $JARNAME)" ]; then  # Tmux stared, but Java did not
        log_failure_msg
        exit 1
      else
        log_success_msg
      fi
    else
      log_warning_msg "Craftbukkit is already running!"
      exit 1
    fi
    ;;

  stop)
    if [ -n "$(pgrep -f -n $JARNAME)" ]; then
      log_daemon_msg "Stopping Minecraft Server" "Craftbukkit"
      sudo -u ${USER} tmux send-keys -t craftbukkit-console "say NOTICE: Server shutting down in 5 seconds!" C-m  >/dev/null 2>&1
      sleep 5
      sudo -u ${USER} tmux send-keys -t craftbukkit-console "stop" C-m  >/dev/null 2>&1
      sleep 10
      if [ -n "$(pgrep -f -n $JARNAME)" ]; then
        log_failure_msg
        exit 1
      else
        log_success_msg
      fi
    else
      log_warning_msg "Craftbukkit is not running!"
      exit 7
    fi
    ;;

  *)
    echo "usage: $0 {start|stop|restart|status} user"
esac

exit 0