#!/usr/bin/env bash

domains=($(echo "$1"|sed -e 's/^\(\([a-zA-Z0-9.-]*\?\)\.\)*\([a-zA-Z0-9-]\+\.[a-zA-Z-]\+\)$/"\1" _acme-challenge.\2 \3/g'))
challenge="$2"

# Please, do not forget to ask for your credentials at https://eu.api.ovh.com/createToken/
# permissions needed are /domain/zone/* in GET,POST,DELETE
applicationKey=${OVH_APPLICATION_KEY:-''}
applicationSecret=${OVH_APPLICATION_SECRET:-''}
consumerKey=${OVH_CONSUMER_KEY:-''}

topDomain=${domains[2]}
subDomain=${domains[1]%%.}

function send
{
        method=$1
        url=$2
        body=$3
        ts=$(date +%s)

        sign=\$1\$$(echo -n "${applicationSecret}+${consumerKey}+${method}+https://eu.api.ovh.com/1.0${url}+${body}+${ts}"|sha1sum|cut -d" " -f1)
        curl -X "${method}" -H "Content-Type: application/json" -H "X-Ovh-Application: ${applicationKey}" -H "X-Ovh-Timestamp: ${ts}" -H "X-Ovh-Signature: ${sign}" -H "X-Ovh-Consumer: ${consumerKey}" -d "${body}" "https://eu.api.ovh.com/1.0${url}"
}

# Creation request
send POST "/domain/zone/${topDomain}/record" "{\"fieldType\":\"TXT\",\"subDomain\":\"$subDomain\",\"ttl\":60,\"target\":\"$challenge\"}"

# Refresh request
send POST "/domain/zone/${topDomain}/refresh" ""

# Pause for 10 seconds, for DNS propagation
sleep 10