#!/bin/bash
# requires: wget, ca-certificates, grep, jq
#rm -f /tmp/cookies.txt

COOKIEFILE="/tmp/cookies.txt"

#USERNAME=""
#PASSWORD=""




# fake user agent
UA="Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:75.0) Gecko/20100101 Firefox/75.0"

# * * * NO MORE CHANGES DOWN HERE * * * 


# parse parameters
DOMAIN=$(echo $1 | sed -r 's/^.*\.(.+\..+)$/\1/')
SUBDOMAIN=$(echo $1 | sed -r 's/^(.+)\..+\..+$/\1/')

if [ "$DOMAIN" == "$SUBDOMAIN" ]; then
  SUBDOMAIN=""
fi

echo "DOMAIN=${DOMAIN}"
echo "SUBDOMAIN=${SUBDOMAIN}"

IPV4=$2

#################################################

# GET LOGIN PAGE
#csrf tokens for login + language xmlhttprequest required to login (nice try blocking my API access, UD)
OUT=$(wget -U "$UA" \
	--save-cookies $COOKIEFILE \
	--keep-session-cookies \
	-qO- "https://www.united-domains.de/login/")

CSRF=$(echo "$OUT" | /bin/grep -oP -m 2 "(?<=<input type=\"hidden\" name=\"csrf\" value=\")[^\"]*(?=\"( /)?>)" | tail -1)
echo "CSRF=${CSRF}"
CSRFMETA=$(echo "$OUT" | /bin/grep -oP -m 1 "(?<=<meta name=\"csrf\" content=\")[^\"]*(?=\"( /)?>)")
echo "CSRFMETA=${CSRFMETA}"
CSRFSCRIPT=$(echo "$OUT" | /bin/grep -oP -m 1 "(?<=\"CSRF_TOKEN\":\")[^\"]*(?=\")")
echo "CSRFSCRIPT=${CSRFSCRIPT}"

wget -U "$UA" \
	--load-cookies $COOKIEFILE \
	--save-cookies $COOKIEFILE \
	--keep-session-cookies \
	--delete-after \
	--post-data "language=en-US" \
	--header="HTTP-X-CSRF-TOKEN: $CSRFMETA" \
	--header="X-Csrf-Token: $CSRFSCRIPT" \
	--header="X-Requested-With: XMLHttpRequest" \
	-qO- "https://www.united-domains.de/set-user-language"


# DO THE LOGIN
echo 'login'
OUT=$(wget -U "$UA" \
	--load-cookies $COOKIEFILE \
	--save-cookies $COOKIEFILE \
	--keep-session-cookies \
	--post-data "csrf=$CSRF&email=$USERNAME&pwd=$PASSWORD&selector=login&loginBtn=Login" \
	-qO- "https://www.united-domains.de/login/")

####################################################################################################
# WE'RE IN

# get domain list in order to determine the DOMAIN_ID for the given DOMAIN
echo 'get domain list'
OUT=$(wget -U "$UA" \
        --load-cookies $COOKIEFILE \
        --save-cookies $COOKIEFILE \
        --keep-session-cookies \
	-qO- 'https://www.united-domains.de/pfapi/dns/domain-list')
if [ "$OUT" = "" ] ; then
  echo "Login not successful"
  exit 1
else
  # parse output for the DOMAIN_ID
  DOMAIN_ID=$(echo "$OUT" | jq -cM --arg v "${DOMAIN}" '.data[] | select(.domain == $v) | .id')
  echo "DOMAIN_ID=${DOMAIN_ID}"
fi


#get current dns record json object & modify ip
echo "get current dns record json object"
current=$(wget -U " $UA" \
	--load-cookies $COOKIEFILE \
	--save-cookies $COOKIEFILE \
	--keep-session-cookies \
	-qO- "https://www.united-domains.de/pfapi/dns/domain/$DOMAIN_ID/records")
#echo "CURRENT: $current"

#record=$(echo $current |
#	jq -cM ".data.A | map(select(.id == $RECORD_ID)) | .[0]" | \
#	sed "s/ //g" | \
#	sed "s/\"address\":\"[0-9.]\+\"/\"address\":\"$ipv4\",\"formId\":${RECORD_ID}/g")


RECORD_ID=$(echo $current | \
	jq -cM --arg v "${SUBDOMAIN}" '.data.A | map(select(.sub_domain == $v)) | .[0].id')

record=$(echo $current |
	jq -cM --arg v "${SUBDOMAIN}" '.data.A | map(select(.sub_domain == $v)) | .[0]' | \
	sed "s/ //g" | \
	sed "s/\"address\":\"[0-9.]\+\"/\"address\":\"${IPV4}\",\"formId\":${RECORD_ID}/g")
echo "NEW: $record"



# load the DNS page for the given DOMAIN_ID to get the latest csrf code
#dnspage=$(wget -U " $UA" \
#	--load-cookies $COOKIEFILE \
#    --save-cookies $COOKIEFILE \
#    --keep-session-cookies \
#    -qO- "https://www.united-domains.de/portfolio/a/domain-admin/dns/$DOMAIN_ID")

#csrfscript=$(echo "$loginpage" | /bin/grep -oP -m 1 "(?<=\"CSRF_TOKEN\":\")[^\"]*(?=\")")
#echo "csrfscript=${csrfscript}"


#send changes
echo "send changes"
#echo -ne "PUT ${url}\n${payload}\n"

PAYLOAD="{\"record\":$record,\"domain_lock_state\":{\"domain_locked\":false,\"email_locked\":false}}"
OUT=$(wget -U " $UA" \
	--load-cookies $COOKIEFILE \
	--save-cookies $COOKIEFILE \
	--keep-session-cookies \
	--method=PUT \
	--header="Accept: application/json" \
	--header="Accept-Encoding: gzip, deflate, br" \
	--header="Accept-Language: de-DE,de;q=0.8,en-US;q=0.5,en;q=0.3" \
	--header="Content-Type: application/json;charset=utf-8" \
	--header="Referer: https://www.united-DOMAINs.de/portfolio/a/DOMAIN-admin/dns/$DOMAIN_ID" \
	--header="Origin: https://www.united-DOMAINs.de" \
	--header="Http-X-Csrf-Token: $CSRFSCRIPT" \
	--body-data=$PAYLOAD \
    -O- "https://www.united-domains.de/pfapi/dns/domain/$DOMAIN_ID/records" 2>&1)
#echo "UD answered: $OUT"

#echo $OUT | /bin/grep "$IPV4" >/dev/null 2>&1

SUCCESS=$?
echo "Retval: $SUCCESS"

exit $SUCCESS