#!/usr/bin/bash
#
# Original script is dns_selhost.sh by Marvin Edeler, https://github.com/Marvo2011/acme.sh/
# Bug-report here: https://github.com/acmesh-official/acme.sh/issues/4291
#
# Modified by CHECKIP.NET to use with Get-Your-Free-DYNDNS and named as dns_checkipnet.sh
# Bug-report per email to: dyndns-checkipnet@email4me.info
# Save as /root/acme.sh/dnsapi/dns_checkipnet.sh
#
# Mit Nutzung von dns_checkipnet.sh stimmst Du zu, dass die Zugriffsdaten in Logdateien und Deine Daten in einer Datenbank gespeichert werden!
#
# By using dns_checkipnet.sh you agree that the access data will be stored in log files and your data in a database!
#
# Last Edit: 08.06.2023



dns_checkipnet_add() {
  fulldomain=$1
  txt=$2
  _info "Calling acme-dns on checkipnet $fulldomain"
  _debug fulldomain "$fulldomain"
  _debug txtvalue "$txt"

  CHECKIPNETDNS_UPDATE_URL="https://dyndns.checkip.net/acme/"

  # Get values, but don't save until we successfully validated
  CHECKIPNETDNS_ID="${CHECKIPNETDNS_ID:-$(_readaccountconf_mutable CHECKIPNETDNS_ID)}"
  # These values are domain dependent, so read them from there
  CHECKIPNETDNS_MAP="${CHECKIPNETDNS_MAP:-$(_readdomainconf CHECKIPNETDNS_MAP)}"
  # checkipnet api can't dynamically add TXT record,
  # so we have to store the last used RID of the domain to support a second RID for wildcard domains
  # (format: 'fulldomainA:lastRid fulldomainB:lastRid ...')
  CHECKIPNETDNS_MAP_LAST_USED_INTERNAL=$(_readdomainconf CHECKIPNETDNS_MAP_LAST_USED_INTERNAL)

  if [ -z "${CHECKIPNETDNS_ID:-}" ] ; then
    _err "CHECKIPNETDNS_ID"
    return 1
  fi

  # get the domain entry from CHECKIPNETDNS_MAP
  # full domains must be wich-dyndns.dyndns.checkip.net,
  # must exact CHECKIPNETDNS_MAP=wich-dyndns.dyndns.checkip.net:rid1:rid2

  mapEntry=$(echo "$CHECKIPNETDNS_MAP" | sed -n -E "s/(^|^.*[[:space:]])(_acme-challenge.t6t6t6t6.checkip.net:.*+)(.*)/\2/p")
  _debug2 mapEntry "$mapEntry"
  if test -z "$mapEntry"; then
    _err "SELFHOSTDNS_MAP must contain the fulldomain incl. prefix and at least one RID"
    return 1
  fi

  # get the RIDs from the map entry
  rid1=$(echo "$mapEntry" | cut -d: -f2)
  rid2=$(echo "$mapEntry" | cut -d: -f3)

  # read last used rid domain
  lastUsedRidForDomainEntry=$CHECKIPNETDNS_MAP_LAST_USED_INTERNAL

  _debug2 lastUsedRidForDomainEntry "$lastUsedRidForDomainEntry"
  lastUsedRidForDomain=$(echo "$lastUsedRidForDomainEntry" | cut -d: -f2)

  rid="$rid1"
  if [ "$lastUsedRidForDomain" = "$rid" ] && ! test -z "$rid2"; then
    rid="$rid2"
  fi

  _info "Trying to add $txt on checkipnet for rid: $rid"

  data="?id=$CHECKIPNETDNS_ID&rid=$rid&content=$txt"
  response="$(_get "$CHECKIPNETDNS_UPDATE_URL$data")"

  if [ "$response" != "0" ]; then
    _err "Invalid response of acme-dns for checkipnet"
    return 1
  fi

  # write last used rid domain
  newLastUsedRidForDomainEntry="$fulldomain:$rid"
  if ! test -z "$lastUsedRidForDomainEntry"; then
    # replace last used rid entry for domain
    CHECKIPNETDNS_MAP_LAST_USED_INTERNAL=$(echo "$CHECKIPNETDNS_MAP_LAST_USED_INTERNAL" | sed -n -E "s/$lastUsedRidForDomainEntry/$newLastUsedRidForDomainEntry/p")
  else
    # add last used rid entry for domain
    if test -z "$CHECKIPNETDNS_MAP_LAST_USED_INTERNAL"; then
      CHECKIPNETDNS_MAP_LAST_USED_INTERNAL="$newLastUsedRidForDomainEntry"
    else
      CHECKIPNETDNS_MAP_LAST_USED_INTERNAL="$CHECKIPNETDNS_MAP_LAST_USED_INTERNAL $newLastUsedRidForDomainEntry"
    fi
  fi

  # Now that we know the values are good, save them
  _saveaccountconf_mutable CHECKIPNETDNS_ID "$CHECKIPNETDNS_ID"
  # These values are domain dependent, so store them there
  _savedomainconf CHECKIPNETDNS_MAP "$CHECKIPNETDNS_MAP"
  _savedomainconf CHECKIPNETDNS_MAP_LAST_USED_INTERNAL "$CHECKIPNETDNS_MAP_LAST_USED_INTERNAL"
}

dns_checkipnet_rm() {
  fulldomain=$1
  txt=$2
  _debug fulldomain "$fulldomain"
  _debug txtvalue "$txt"
  _info "Creating and removing of records is not supported by CHECKIPNET API, will not delete anything."
}