#!/bin/bash
MONDIR=/var/lib/mon

#resolution of modify times is only 2 second on some filesystems, so prevent race conditions by touching it now and sleeping 2 seconds
touch $MONDIR/.zabbix-time
echo "Sleeping..."
sleep 2

#traveled back in time? (e.g. systemclock is adjusted)
if [ $MONDIR/.zabbix-time -ot $MONDIR/zabbix-latest ]; then
	#just resend everything
	rm $MONDIR/zabbix-latest
fi

UPDATES=""

#Let zabbix rediscover all syn-3 facilities if something changed:
if [ $MONDIR/alerts -nt $MONDIR/zabbix-latest ]; then
	echo "Rediscovering services..."
	cd $MONDIR/alerts
	JSON=
	for FACILITY in *; do
		#JOBTTL=`cat $JOBNAME`
		if [ "$JSON" != "" ]; then
			JSON=$JSON', '
		fi
		JSON=$JSON'{ "{#FACILITY}": "'$FACILITY'" } '
	done
	MODIFY_TIME=`stat --format=%Y .`

	#low level discovery takes time, so send it and then wait a minute to process
	echo -en '- syn3.discovery { "data": [ '$JSON' ] }\n' | zabbix_sender -vv  -c /etc/zabbix/zabbix_agentd.conf -i - || exit 1
	echo "Waiting for zabbix to process discovery..."
	sleep 65
fi

#Find all facility states that have changed since last succesfull send
cd $MONDIR/alerts
for FACILITY in *; do
	#NOTE: msg-modifytime only changes if something actually changed, while state-modifytime always changes when syn3-state is called.
	if [ $FACILITY/msg -nt $MONDIR/zabbix-latest ]; then
		echo "Facility $FACILITY has changed since last send."
		STATE=`cat $FACILITY/state`
		MODIFY_TIME=`stat --format=%Y $FACILITY/state`
		MSG=`cat $FACILITY/msg | tr '\n' ' '`
		UPDATES="$UPDATES""- syn3.state[$FACILITY] $STATE, $MSG\n"
	fi
done


if [ "$UPDATES" != "" ]; then
	echo "Sending updates to zabbix:"
	echo -en "$UPDATES"
	if echo -en "$UPDATES" | zabbix_sender -vv  -c /etc/zabbix/zabbix_agentd.conf -i -; then
		#only if everything went ok, we update the timestamp of the latest-file. otherwise everything will be send again.
		mv $MONDIR/.zabbix-time $MONDIR/zabbix-latest
		echo "All updates sent ok."
	else
		echo "Error while sending, will try again later."
		exit 1
	fi
else
	echo "No changes found"
fi