#!/usr/bin/env bash
# Need to add your API key below or set as env variable
apikey=${DYNU_API_KEY:-''}

# This script deletes the _acme-challenge TXT record from the dynu.com DNS entry for the domain
# usage dns_del_dynu "domain name"
# return codes are;
# 0 - success
# 1 - error in input
# 2 - error within internal processing
# 3 - error in result ( domain not found in dynu.com etc)

# After deleting the TXT record from Dynu.com it takes over 30 minutes to add a new TXT record!
# This doesn't happen when updating the TXT record, just for delete then add
# As this is used for testing, changed the delete to a no-op.

exit 0

fulldomain="${1}"

API='https://api.dynu.com/v2/dns'

# Check initial parameters
if [[ -z "$fulldomain" ]]; then
  echo "DNS script requires full domain name as first parameter"
  exit 1
fi
if [[ -z "$apikey" ]]; then
  echo "DNS script requires apikey environment variable to be set"
  exit 1
fi

curl_params=( -H "accept: application/json" -H "API-Key: $apikey" -H 'Content-Type: application/json' )

# Get domain id
# curl -X GET https://api.dynu.com/v2/dns/getroot/ubuntu-getssl.freeddns.org
resp=$(curl --silent "${curl_params[@]}" -X GET "$API/getroot/${fulldomain}")

# Match domain id
re="\"id\":([^,]*),\"domainName\":\"${fulldomain}\""
if [[ "$resp" =~ $re ]]; then
  domain_id="${BASH_REMATCH[1]}"
fi

if [[ -z "$domain_id" ]]; then
  echo 'Domain name not found on your Dynu account'
  exit 3
fi

# Check for existing _acme-challenge TXT record
# curl -X GET "https://api.dynu.com/v2/dns/record/_acme-challenge.ubuntu-getssl.freeddns.org?recordType=TXT"
resp=$(curl --silent "${curl_params[@]}" -X GET "${API}/record/_acme-challenge.${fulldomain}?recordType=TXT")
re="\"id\":([^,]*)"
if [[ "$resp" =~ $re ]]; then
  record_id="${BASH_REMATCH[1]}"
fi

if [[ -z "$record_id" ]]; then
  echo "No _acme-challenge.${fulldomain} TXT record found"
  exit 0
fi

resp=$(curl --silent \
  "${curl_params[@]}" \
  -X DELETE "${API}/${domain_id}/record/${record_id}")

# If adding record failed (exception:) then print error message
if [[ "$resp" != *"\"statusCode\":200"* ]]; then
  echo "Error: DNS challenge not added: unknown error - ${resp}"
  exit 3
fi