#!/bin/bash

# Festlegen der grundvariablen
now=`date +%s`
commandfile='/usr/local/nagios/var/rw/nagios.cmd'
sqlusername=mailmonitor
sqldatabase=opsview

subject=""
comment=""
hostname=""
service=""
fromAddr=""
user=""

# Abarbeiten der StdIn Pipe
while read stdinput ; do


	# Returnpath der Mail auswerten und über E-Mailadresse UserID aus Opsview Datenbank ermitteln
	if [ $(echo $stdinput | grep -c "Return-Path:" ) -gt 0 ]; then

		# Adresse aus Mailheader ermitteln
		fromAddr=$( echo $stdinput | grep "Return-Path:" | head -1 | cut -d" " -f 2 | sed 's/<//' | sed 's/>//' )

		# Opsview UserID aus Datenbank ermitteln
		user=$( mysql -t -N -u $sqlusername $sqldatabase -e "select username from contacts where upper(email) = upper('$fromAddr');" | grep -v "+" | cut -d" " -f 2 )

		# Wenn der zurückgegebene User eine Länge von 0 Zeichen hat, dann Abbruch.
		if [ ${#user} -eq 0 ]; then
		
			exit 1;

		fi

	fi

	# Prüfen ob Mailsubject ein Acknowledge enthält
	if [ $(echo $stdinput | grep "Subject:" | grep -c "Acknowledge") -gt 0 ] && [ ${#subject} -eq 0 ]; then

		subject=$( echo $stdinput | grep "Subject:" | grep "Acknowledge" )

		if [ $(echo $subject | grep -c "-" ) -gt 0 ]; then

			comment=$( echo $subject | cut -d"-" -f 2 )

		else

			comment="Acknowledged, but no comment"
		fi

	fi

	# Ermitteln des Hostname
	if [ $( echo $stdinput | grep -c "Host:" ) -gt 0 ] && [ ${#hostname} -eq 0 ]; then

		hostname=$( echo $stdinput | grep "Host:"  | cut -d":" -f 2 | sed 's/ //' )

	fi

	# Ermitteln des Servicenamens
	if [ $( echo $stdinput | grep -c "Service:" ) -gt 0 ] && [ ${#service} -eq 0 ]; then

		service=$( echo $stdinput | grep "Service:"  | cut -d":" -f 2 | sed 's/ //' )

	fi

done

# Wenn Servicename ermittelt werden kann, Service Acknowledge durchführen.
if [ ${#service} -gt 1 ]; then

	# Serviceacknowledge senden
	ackType="Service Acknowledge"
	/usr/bin/printf "[%lu] ACKNOWLEDGE_SVC_PROBLEM;$hostname;$service;1;1;1;$user;$comment\n" $now > $commandfile

else

	# Hostacknowledge senden
	ackType="Host Acknowledge"
	/usr/bin/printf "[%lu] ACKNOWLEDGE_HOST_PROBLEM;$hostname;1;1;1;$user;$comment\n" $now > $commandfile

fi

# Ausgabe der Infos für Debuggingzwecke
echo "-----------------------------------------------"
echo "From:         $fromAddr"
echo "Username:     $user"
echo "Subject:      $subject"
echo "Hostname:     $hostname"
echo "Service:      $service"
echo "Comment:      $comment"
echo "Type:         $ackType"
echo "-----------------------------------------------"
exit 0