#!/bin/bash
#########################################################################
#                Script for change important parameters                 #
#                            Created by DoIT                            #
#                                  1.3                                  #
#########################################################################

#------------------------------ DEFINITION -----------------------------#
SERIAL="N"
MOD=TEST

#------------------------------- LOCAL IP ------------------------------#
check_nic(){
NICS=$(find /sys/class/net -type l ! -lname '*lo*' -printf '%f\n')
for i in $NICS;
do
CI=$(ifconfig $i | grep -w inet)
if [ ! -z "$CI" ]; then
        echo -e "- \e[1;32mActive\e[0m [\e[1;33m$i\e[0m]"
        SN=$(ifconfig $i | grep -w ether | sed 's/:/ /g' | awk '{print tolower ($5$6$7)}')
        IP=$(ifconfig $i | grep -w inet | awk '{print $2}')
fi
done
if [ -z "$IP" ]; then
        echo -e "- \e[1;31mmissing\e[0m IP address"
exit 1
else
        echo -e "- \e[1;32mIP-Address\e[0m [\e[1;33m$IP\e[0m]"
fi
OLDURL=$(cat /etc/monit/monitrc | grep "use address" | awk '{print $3}')
}

#--------------------------- UPDATE HOSTNAME ---------------------------#
update_host(){
if [[ "$SERIAL" == "Y" ]]; then
        HOST=$(cat /etc/hosts | grep "$MOD-$SN" | awk '{print $2}' | head -1)
        HNAME=$(cat /etc/hostname | grep "$MOD-$SN")

        if [[ "$MOD-$SN" != "$HOST" ]] || [[ "$MOD-$SN" != "$HNAME" ]];
        then
                echo -e "- \e[1;33mUpdating\e[0m [\e[1;34mHOST\e[0m]"
                chattr -i /etc/hostname
                echo "$MOD-$SN" > /etc/hostname
                chattr +i /etc/hostname
                chattr -i /etc/hosts
                echo "127.0.0.1 localhost" > /etc/hosts
                echo "127.0.1.1 $MOD-$SN" >> /etc/hosts
                chattr +i /etc/hosts
                hostname "$MOD-$SN"
        fi
else
        HOST=$(cat /etc/hosts | grep "$MOD" | awk '{print $2}' | head -1)
        HNAME=$(cat /etc/hostname | grep "$MOD")
        if [[ "$MOD" != "$HOST" ]] || [[ "$MOD" != "$HNAME" ]];
        then
                echo -e "- \e[1;33mUpdating\e[0m [\e[1;34mHOST\e[0m]"
                chattr -i /etc/hostname
                echo "$MOD" > /etc/hostname
                chattr +i /etc/hostname
                chattr -i /etc/hosts
                echo "127.0.0.1 localhost" > /etc/hosts
                echo "127.0.1.1 $MOD" >> /etc/hosts
                chattr +i /etc/hosts
                hostname "$MOD"
        fi
fi
}

#----------------------------- UPDATE MONIT ----------------------------#
update_monit(){
MONIT=$(cat /etc/monit/monitrc | grep "check system" | awk '{print $3}')
MONIP=$(cat /etc/monit/monitrc | grep "use address" | awk '{print $3}')
if [[ "$SERIAL" == "Y" ]]; then
        if [[ "$MOD-$SN" != "$MONIT" ]] || [[ "$IP" != "$MONIP" ]]; then
                echo -e "- \e[1;33mUpdating\e[0m [\e[1;35m/etc/monit/monitrc\e[0m]"
                sed -i "s/check system.*/check system $MOD-$SN/g" /etc/monit/monitrc
                sed -i "s/use address.*/use address $IP/g" /etc/monit/monitrc
                /etc/init.d/monit restart > /dev/null 2>&1 || systemctl restart monit > /dev/null 2>&1
        fi
else
        if [[ "$MOD" != "$MONIT" ]] || [[ "$IP" != "$MONIP" ]]; then
                echo -e "- \e[1;33mUpdating\e[0m [\e[1;35m/etc/monit/monitrc\e[0m]"
                sed -i "s/check system.*/check system $MOD/g" /etc/monit/monitrc
                sed -i "s/use address.*/use address $IP/g" /etc/monit/monitrc
                /etc/init.d/monit restart > /dev/null 2>&1 || systemctl restart monit > /dev/null 2>&1
        fi
fi
}

#----------------------------- UPDATE APC ------------------------------#
update_apc(){
APCD=$(cat /etc/apcupsd/apcupsd.conf | grep UPSNAME | awk '{print $2}')
APCH=$(cat /etc/apcupsd/hosts.conf | grep MONITOR | awk '{print $3}' | sed 's/"//g')
APCI=$(cat /etc/apcupsd/hosts.conf | grep MONITOR | awk '{print $2}' | sed 's/"//g')
if [[ "$SERIAL" == "Y" ]]; then
        if [[ "$MOD-$SN" != "$APCD" ]] || [[ "$MOD-$SN" != "$APCH" ]] || [[ "$IP" != "$APCI" ]]; then
                echo -e "- \e[1;33mUpdating\e[0m [\e[1;35m/etc/apcupsd/hosts.conf\e[0m]"
                echo -e "- \e[1;33mUpdating\e[0m [\e[1;35m/etc/apcupsd/apcupsd.conf\e[0m]"
                sed -i "s/UPSNAME.*/UPSNAME $MOD-$SN/g" /etc/apcupsd/apcupsd.conf
                sed -i "s/MONITOR.*/MONITOR $IP \"$MOD-$SN\"/g" /etc/apcupsd/hosts.conf
                /etc/init.d/apcupsd restart > /dev/null 2>&1 || systemctl restart monit > /dev/null 2>&1
        fi
else
        if [[ "$MOD" != "$APCD" ]] || [[ "$MOD" != "$APCH" ]] || [[ "$IP" != "$APCI" ]]; then
                echo -e "- \e[1;33mUpdating\e[0m [\e[1;35m/etc/apcupsd/hosts.conf\e[0m]"
                echo -e "- \e[1;33mUpdating\e[0m [\e[1;35m/etc/apcupsd/apcupsd.conf\e[0m]"
                sed -i "s/UPSNAME.*/UPSNAME $MOD/g" /etc/apcupsd/apcupsd.conf
                sed -i "s/MONITOR.*/MONITOR $IP \"$MOD\"/g" /etc/apcupsd/hosts.conf
                /etc/init.d/apcupsd restart > /dev/null 2>&1 || systemctl restart monit > /dev/null 2>&1
        fi
fi
}

#--------------------------- UPDATE POSTFIX ----------------------------#
update_postfix(){
POSTFIX=$(cat /etc/postfix/main.cf | grep -w "^myhostname" | awk '{print $3}')
if [[ "$SERIAL" == "Y" ]]; then
        if [[ "$MOD-$SN" != "$POSTFIX" ]]; then
                echo -e "- \e[1;33mUpdating\e[0m [\e[1;35m/etc/postfix/main.cf\e[0m]"
                sed -i "s/myhostname =.*/myhostname = $MOD-$SN/g" /etc/postfix/main.cf
                sed -i "s/mydestination = \$myhostname,.*/mydestination = \$myhostname, $MOD-$SN, localhost/g" /etc/postfix/main.cf
                newaliases
                /etc/init.d/postfix restart > /dev/null 2>&1 || systemctl restart postfix > /dev/null 2>&1
        fi
else
        if [[ "$MOD" != "$POSTFIX" ]]; then
                echo -e "- \e[1;33mUpdating\e[0m [\e[1;35m/etc/postfix/main.cf\e[0m]"
                sed -i "s/myhostname =.*/myhostname = $MOD/g" /etc/postfix/main.cf
                sed -i "s/mydestination = \$myhostname,.*/mydestination = \$myhostname, $MOD, localhost/g" /etc/postfix/main.cf
                newaliases
                /etc/init.d/postfix restart > /dev/null 2>&1 || systemctl restart postfix > /dev/null 2>&1
        fi
fi
}

#-------------------------- UPDATE WEB SOURCE --------------------------#
update_web(){
OLDURL=$(cat /var/www/index.html | grep http | awk '{print $4}' | sed 's/\/\// /g' | sed 's/\// /g' | sed 's/:/ /g' | awk '{print $2}' | sort | uniq | grep [0-9])
LST=$(find /var/www/ -name index.htm*)
if [[ "$OLDURL" != "$IP" ]]; then
echo -e "- \e[1;33mUpdating\e[0m \e[1;34mIP\e[0m [\e[1;35m$IP\e[0m]"
for w in $LST;
do
sed -i "s/$OLDURL/$IP/g" $w
done
fi
for w in $LST;
do
OLDHST=$(cat $w | grep -i TITLE | sed 's/>/ /g' | sed 's/</ /g' | awk '{print $2}')
if [[ "$SERIAL" == "Y" ]]; then
        if [[ "$OLDHST" != "$MOD-$SN" ]]; then
                echo -e "- \e[1;33mUpdating\e[0m \e[1;34mHOST\e[0m [\e[1;35m$w\e[0m]"
                sed -i "s/<TITLE>.*/<TITLE>$MOD-$SN<\/TITLE>/g" $w
                sed -i "s/<title>.*/<title>$MOD-$SN<\/title>/g" $w
#               sed -i "s/on server.*/on server [<b>$MOD-$SN<\/b>]<\/font><\/p>/g" $w
                sed -i "/on server/s/\[[^]]*\]/[$MOD-$SN]/g" $w
        fi
else
        if [[ "$OLDHST" != "$MOD" ]]; then
                echo -e "- \e[1;33mUpdating\e[0m \e[1;34mHOST\e[0m [\e[1;35m$w\e[0m]"
                sed -i "s/<TITLE>.*/<TITLE>$MOD<\/TITLE>/g" $w
                sed -i "s/<title>.*/<title>$MOD<\/title>/g" $w
#               sed -i "s/on server.*/on server [<b>$MOD<\/b>]<\/font><\/p>/g" $w
                sed -i "/on server/s/\[[^]]*\]/[$SRV]/g" $w
        fi
fi
done
}

#--------------------------------- CORE --------------------------------#
clear
check_nic
update_host
test -f /etc/monit/monitrc && update_monit
test -f /etc/postfix/main.cf && update_postfix
test -f /etc/apcupsd/apcupsd.conf && update_apc
test -d /var/www/ && update_web