#!/bin/sh
# description: Start or stop telegram-bash-bot
#
# example service script to run bashbot in background as specified user
#
# tested on: ubuntu, opensuse, debian
#
#### $$VERSION$$ v1.51-0-g6e66a28
# shellcheck disable=SC2009
# shellcheck disable=SC2181
# shellcheck disable=SC2250

#
### BEGIN INIT INFO
# Provides: bashbot
# Required-Start: $network $syslog
# Required-Stop: $network
# Default-Start: 2 3 5
# Default-Stop: 0 1 6
# Description: Start or stop telegram-bot-bash server
### END INIT INFO

# save default values
TERM="" # disable bashbot clear and color output
runcmd="echo Dry run:" # not activated until you edit lines below

#######################
# Configuration Section

# edit the next line to fit the user you want to run bashbot, e.g. nobody:
runas="nobody"

# uncomment one of the example lines to fit your system 
# runcmd="su ${runas} -s /bin/bash -c "      # runasuser with *su*
# runcmd="/usr/sbin/runuser ${runas} -s /bin/bash -c " # runasuser with *runuser*

# edit the values of the following lines to fit your config:
# your bot name as given to botfather, e.g. mysomething_bot
name=""
[ -z "${name}" ] && name="unknown"

# your bot installation dir
bashbotdir="/usr/local/telegram-bot-bash"
databotdir="${bashbotdir}/data-bot-bash"
FIFO="${databotdir}/webhook-fifo-${name}"

# programs to run
bashbot="cd ${bashbotdir}; ${bashbotdir}/bashbot.sh"
webhook="cd ${bashbotdir}; nohup ${bashbotdir}/bin/process_batch.sh --startbot --watch ${FIFO}"
# set additionl parameter, e.g. debug
mode=""

# select logfile for webhook start stop and script errors
hooklog="DEBUG"
hooklog="WEBHOOK"

# END Configuration
#######################


# check for bot status
ps -f -u "${runas}" | grep "${name}" | grep -qF "bashbot.sh startbot"
if [ "$?" = "0" ]; then
	# printf "bashbot (%s) is running in poll mode\n" "${name}"
	stat="poll"
else
	ps -f -u "${runas}" | grep "${name}" | grep -qF "process_batch.sh --startbot"
	if [ "$?" = "0" ]; then
		#printf "bashbot (%s) is running in webhook mode\n" "${name}"
		stat="hook"
	elif [ "${name}" != "unknown" ]; then
		#printf "bashbot (%s) is stopped\n" "${name}"
		stat="stop"
	else
		stat="unknown"
	fi
fi

case "$1" in
'start')
	[ "${stat}" != "stop" ] && printf "Warning, bot is running in mode: %s\n" "${stat}"
	$runcmd "$bashbot start $mode" # >/dev/null 2>&1 </dev/null
	RETVAL=$?
	;;
'starthook')
	[ -p "${FIFO}" ] || printf "Warning, webhook pipe not found: %s\n" "${FIFO##*/}"
	[ "${stat}" != "stop" ] && printf "Warning, bot is running in mode: %s\n" "${stat}"
	printf "Starting bashbot in webhook mode ... "
	$runcmd "$webhook $mode </dev/null &>>${bashbotdir}/logs/${hooklog}.log &" # >/dev/null 2>&1 </dev/null
	sleep 1
	$0 status
	RETVAL=$?
	;;
'stop')
	[ "${stat}" != "poll" ] && printf "Warning, bot is not in poll mode: %s\n" "${stat}"
	$runcmd "$bashbot stop $mode"
	RETVAL=$?
	;;
'stophook')
	[ "${stat}" != "hook" ] && printf "Warning, bot is not in webhook mode: %s\n" "${stat}"
	printf "Stopping bashbot webhook mode ... "
	KILLID="$(ps -f -u "${runas}" | grep "process_batch.sh --startbot" | sed -E 's/[^0-9]+([0-9]+).*/\1/' | tr -s "\r\n" "  ")"
	if [ -n "${KILLID}" ]; then
		$runcmd "kill ${KILLID}; wait ${KILLID} 2>/dev/null"
		sleep 1
	fi
	RETVAL=$?
	$0 status
	;;
'status')
	case "${stat}" in
		"poll"*) printf "bashbot (%s) is running in poll mode\n" "${name}"
			RETVAL=0
			;;
		"hook"*) printf "bashbot (%s) is running in webhook mode\n" "${name}"
			RETVAL=0
			;;
		"stop"*) printf "bashbot (%s) is not running\n" "${name}"
			RETVAL=1
			;;
		*)	printf "bashbot (%s) status is %s\n" "${name}" "${stat}"
			RETVAL=2
			;;
	esac
	;;
'restart'|'reload')
	$0 stop; $0 start 
	RETVAL=$?
	;;
'restarthook'|'reloadhook')
	$0 stophook; $0 starthook 
	RETVAL=$?
	;;
'restartback')
	$0 suspendback; $0 resumeback 
	RETVAL=$?
	;;
'suspendback'|'resumeback'|'killback')
	# shellcheck disable=SC2250
	$runcmd "$bashbot $1 $mode"
	RETVAL=$?
	# kill inotifywait from runuser
	if [ "$1" != "resumeback" ]; then 
		# shellcheck disable=SC2046
		kill -9 $(ps -u "${runas}" | grep inotifywait | sed 's/ .*//') >/dev/null 2>&1
	fi  
	;;
*)
	printf "%s\n" "Usage: $0 [ start  | stop | restart | starthook |  stophook  | restarthook ]"
	printf "%s\n" "       $0 [ status | restartback | suspendback  | resumeback | killback ]"
	RETVAL=1
	;;
esac
exit "${RETVAL}"