#!/bin/sh
# Copyright (C) 2006 OpenWrt.org
#
# $1 - command add/del, $2 job key/index, $3 job string for add

START=12

CRONTAB_DIR=/tmp/crontabs
CRONTAB_FILE=$CRONTAB_DIR/root
CRONTAB_CFG=/tmp/crontabs.cfg
CRONTAB_SECT=crontab

create_db() {
	echo "!" > $CRONTAB_CFG
}

boot(){
	mkdir -p $CRONTAB_DIR
	rm -f $CRONTAB_FILE
	create_db
	start
}

start () {
#	loglevel=$(uci_get "system.@system[0].cronloglevel")
#	[ -z "$(ls /etc/crontabs/)" ] && exit 1
#	mkdir -p /var/spool/cron
#	ln -s /etc/crontabs /var/spool/cron/ 2>/dev/null
#	crond -c /etc/crontabs -l ${loglevel:-5}
	crond -c $CRONTAB_DIR -l 8
}

stop() {
	pkill -9 crond
}

restart() {
	stop
	start
}

export_job() {

	rm -f $CRONTAB_FILE
	touch $CRONTAB_FILE

	job=`umngcli -f $CRONTAB_CFG getfirst @${CRONTAB_SECT}`
	while [ -n "$job" ] ; do
		key=`echo "${job}" | cut -d '=' -f 1`
		val=`echo "${job}" | cut -d '=' -f 2`
		if [ -n "$val" ] ; then
			echo "$val" >> $CRONTAB_FILE
		fi
		if [ -z "$key" ] ; then
			break
		fi
		job=`umngcli -f $CRONTAB_CFG getnext ${key}@${CRONTAB_SECT}`
	done
}

# $1 - key
# $2 - cron job string
add() {
	if [ -z "$2" ] ; then
		return 0
	fi

	if ! [ -f "$CRONTAB_CFG" ] ; then
		create_db
	fi

	if [ "`umngcli -f $CRONTAB_CFG get ${1}@${CRONTAB_SECT}`" == "$2" ] ; then
		return 0
	fi

	umngcli -f $CRONTAB_CFG set ${1}@${CRONTAB_SECT}="$2"

	export_job

	restart
}

# $1 - key
del() {
	if [ -z "$1" ] ; then
		return 0
	fi

	if ! [ -f "$CRONTAB_CFG" ] ; then
		create_db
	fi

	if [ -z "`umngcli -f $CRONTAB_CFG get ${1}@${CRONTAB_SECT}`" ] ; then
		return 0
	fi

	umngcli -f $CRONTAB_CFG unset ${1}@${CRONTAB_SECT}

	export_job

	restart
}


case "$1" in
	"boot")		boot; exit 0	;;
	"start")	start; exit 0	;;
	"stop")		stop; exit 0	;;
	"restart")	restart; exit 0	;;
	"add")
				if [ -n "$3" ] ; then
					add $2 "$3"
					exit 0
				fi
				;;
	"del")
				if [ -n "$2" ] ; then
					del $2
					exit 0
				fi
				;;
	"list")
				crontask=`umngcli -f ${CRONTAB_CFG}  getfirst @${CRONTAB_SECT}`
				while [ -n "$crontask" ] ; do
					echo "$crontask"
					crontask=`echo $crontask | cut -d '=' -f 1`
					if [ -n "$crontask" ] ; then
						crontask=`umngcli -f ${CRONTAB_CFG} getnext ${crontask}@${CRONTAB_SECT}`
					fi
				done
				exit 0
				;;
	"listrun")
				cat $CRONTAB_FILE
				exit 0
				;;
esac

echo $0 'boot                      - setup and start cron function'
echo $0 'start                     - start cron function'
echo $0 'stop                      - stop cron function'
echo $0 'add <key> <cron_command>  - add cron function'
echo $0 'del <key>                 - del cron function'
echo $0 'list                      - list configured cron task'
echo $0 'listrun                   - list real cron task'