#!/bin/bash

PIDOF_CMD=/sbin/pidof
ECHO_CMD=/usr/bin/echo
SLEEP_CMD=/usr/bin/sleep
KILL_CMD=/bin/kill

NAME=graylog-sidecar
GRAYLOG_CMD=${GRAYLOG_CMD-/usr/bin/${NAME}}

graylog_sidecar_start() {
  if [ -n "$($PIDOF_CMD graylog-sidecar)" ]; then
    $ECHO_CMD "Graylog Sidecar seems to be already running."
    return
  fi

  $ECHO_CMD "Starting Graylog Sidecar."
  $GRAYLOG_CMD & 
}

graylog_sidecar_stop() {
  if [ -z "$($PIDOF_CMD graylog-sidecar)" ]; then
    $ECHO_CMD "Graylog Sidecar does not seem to be running."
    return
  fi

  $ECHO_CMD "Stopping Graylog Sidecar."
  $KILL_CMD $($PIDOF_CMD graylog-sidecar)
}

graylog_sidecar_restart() {
  $ECHO_CMD "Restarting Graylog Sidecar."
  graylog_sidecar_stop
  $SLEEP_CMD 5
  graylog_sidecar_start
}

case "$1" in
'start')
  graylog_sidecar_start
  ;;
'stop')
  graylog_sidecar_stop
  ;;
'restart')
  graylog_sidecar_restart
  ;;
*)
  echo "usage: $0 start|stop|restart"
esac