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#!/usr/bin/env bash
set -euo pipefail
DOMAIN=$1
SUB_DOMAIN="${2}.${DOMAIN}"
CF_ID=$3
CF_KEY=$4
IP=
if [ -n "${5+x}" ]; then
IP=$5
else
IP=$(curl -s http://ipv4.icanhazip.com)
fi
echo "Updating DNS for ${SUB_DOMAIN}..."
ZONE=$(curl -sLX GET "https://api.cloudflare.com/client/v4/zones?name=${DOMAIN}&status=active" \
-H "X-Auth-Email: ${CF_ID}" \
-H "X-Auth-Key: ${CF_KEY}" \
-H "Content-Type: application/json" | jq -r .result[0].id)
RECORD=$(curl -sLX GET "https://api.cloudflare.com/client/v4/zones/${ZONE}/dns_records?name=${SUB_DOMAIN}" \
-H "X-Auth-Email: ${CF_ID}" \
-H "X-Auth-Key: ${CF_KEY}" \
-H "Content-Type: application/json" | jq -r .result[0].id)
echo "Got record id ${RECORD}"
if [[ "${#RECORD}" -le 10 ]]; then
RECORD=$(curl -sLX POST "https://api.cloudflare.com/client/v4/zones/${ZONE}/dns_records" \
-H "X-Auth-Email: ${CF_ID}" \
-H "X-Auth-Key: ${CF_KEY}" \
-H "Content-Type: application/json" \
--data '{"type":"A","name":"'${SUB_DOMAIN}'","content":"'${IP}'","ttl":120,"proxied":false}' | jq -r .result.id)
echo "Created record id ${RECORD}"
fi
RESULT=$(curl -sLX PUT "https://api.cloudflare.com/client/v4/zones/${ZONE}/dns_records/${RECORD}" \
-H "X-Auth-Email: ${CF_ID}" \
-H "X-Auth-Key: ${CF_KEY}" \
-H "Content-Type: application/json" \
--data '{"type":"A","name":"'${SUB_DOMAIN}'","content":"'${IP}'","ttl":120,"proxied":false}')
echo "${RESULT}"
if [[ "${RESULT}" != *"success\":true"* ]] && [[ "${RESULT}" != *"A record with those settings already exists."* ]] ; then
exit 1
fi
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