#!/usr/bin/env sh
# This file name is "dns_1984hosting.sh"
# So, here must be a method dns_1984hosting_add()
# Which will be called by acme.sh to add the txt record to your api system.
# returns 0 means success, otherwise error.

# Author: Adrian Fedoreanu
# Report Bugs here: https://github.com/acmesh-official/acme.sh
# or here... https://github.com/acmesh-official/acme.sh/issues/2851

######## Public functions #####################

# Export 1984HOSTING username and password in following variables
#
#  One984HOSTING_Username=username
#  One984HOSTING_Password=password
#
# username/password and csrftoken/sessionid cookies are saved in ~/.acme.sh/account.conf

# Usage: dns_1984hosting_add   _acme-challenge.www.domain.com   "XKrxpRBosdIKFzxW_CT3KLZNf6q0HG9i01zxXp5CPBs"
# Add a text record.
dns_1984hosting_add() {
  fulldomain=$1
  txtvalue=$2

  _info "Add TXT record using 1984Hosting."
  _debug fulldomain "$fulldomain"
  _debug txtvalue "$txtvalue"

  if ! _1984hosting_login; then
    _err "1984Hosting login failed for user $One984HOSTING_Username. Check $HTTP_HEADER file."
    return 1
  fi

  _debug "First detect the root zone."
  if ! _get_root "$fulldomain"; then
    _err "Invalid domain '$fulldomain'."
    return 1
  fi
  _debug _sub_domain "$_sub_domain"
  _debug _domain "$_domain"

  _debug "Add TXT record $fulldomain with value '$txtvalue'."
  value="$(printf '%s' "$txtvalue" | _url_encode)"
  url="https://1984.hosting/domains/entry/"

  postdata="entry=new"
  postdata="$postdata&type=TXT"
  postdata="$postdata&ttl=900"
  postdata="$postdata&zone=$_domain"
  postdata="$postdata&host=$_sub_domain"
  postdata="$postdata&rdata=%22$value%22"
  _debug2 postdata "$postdata"

  _authpost "$postdata" "$url"
  if _contains "$_response" '"haserrors": true'; then
    _err "1984Hosting failed to add TXT record for $_sub_domain bad RC from _post."
    return 1
  elif _contains "$_response" "html>"; then
    _err "1984Hosting failed to add TXT record for $_sub_domain. Check $HTTP_HEADER file."
    return 1
  elif _contains "$_response" '"auth": false'; then
    _err "1984Hosting failed to add TXT record for $_sub_domain. Invalid or expired cookie."
    return 1
  fi

  _info "Added acme challenge TXT record for $fulldomain at 1984Hosting."
  return 0
}

# Usage: fulldomain txtvalue
# Remove the txt record after validation.
dns_1984hosting_rm() {
  fulldomain=$1
  txtvalue=$2

  _info "Delete TXT record using 1984Hosting."
  _debug fulldomain "$fulldomain"
  _debug txtvalue "$txtvalue"

  if ! _1984hosting_login; then
    _err "1984Hosting login failed for user $One984HOSTING_Username. Check $HTTP_HEADER file."
    return 1
  fi

  _debug "First detect the root zone."
  if ! _get_root "$fulldomain"; then
    _err "Invalid domain '$fulldomain'."
    return 1
  fi
  _debug _sub_domain "$_sub_domain"
  _debug _domain "$_domain"
  _debug "Delete $fulldomain TXT record."

  url="https://1984.hosting/domains"
  if ! _get_zone_id "$url" "$_domain"; then
    _err "Invalid zone '$_domain'."
    return 1
  fi

  _htmlget "$url/$_zone_id" "$txtvalue"
  entry_id="$(echo "$_response" | _egrep_o 'entry_[0-9]+' | sed 's/entry_//')"
  _debug2 entry_id "$entry_id"
  if [ -z "$entry_id" ]; then
    _err "Error getting TXT entry_id for $1."
    return 1
  fi

  _authpost "entry=$entry_id" "$url/delentry/"
  if ! _contains "$_response" '"ok": true'; then
    _err "1984Hosting failed to delete TXT record for $entry_id bad RC from _post."
    return 1
  fi

  _info "Deleted acme challenge TXT record for $fulldomain at 1984Hosting."
  return 0
}

####################  Private functions below ##################################
_1984hosting_login() {
  if ! _check_credentials; then return 1; fi

  if _check_cookies; then
    _debug "Already logged in."
    return 0
  fi

  _debug "Login to 1984Hosting as user $One984HOSTING_Username."
  username=$(printf '%s' "$One984HOSTING_Username" | _url_encode)
  password=$(printf '%s' "$One984HOSTING_Password" | _url_encode)
  url="https://1984.hosting/accounts/checkuserauth/"

  _get "https://1984.hosting/accounts/login/" | grep "csrfmiddlewaretoken"
  csrftoken="$(grep -i '^set-cookie:' "$HTTP_HEADER" | _egrep_o 'csrftoken=[^;]*;' | tr -d ';')"
  sessionid="$(grep -i '^set-cookie:' "$HTTP_HEADER" | _egrep_o 'sessionid=[^;]*;' | tr -d ';')"

  if [ -z "$csrftoken" ] || [ -z "$sessionid" ]; then
    _err "One or more cookies are empty: '$csrftoken', '$sessionid'."
    return 1
  fi

  export _H1="Cookie: $csrftoken; $sessionid"
  export _H2="Referer: https://1984.hosting/accounts/login/"
  csrf_header=$(echo "$csrftoken" | sed 's/csrftoken=//' | _head_n 1)
  export _H3="X-CSRFToken: $csrf_header"

  response="$(_post "username=$username&password=$password&otpkey=" $url)"
  response="$(echo "$response" | _normalizeJson)"
  _debug2 response "$response"

  if _contains "$response" '"loggedin": true'; then
    One984HOSTING_SESSIONID_COOKIE="$(grep -i '^set-cookie:' "$HTTP_HEADER" | _egrep_o 'sessionid=[^;]*;' | tr -d ';')"
    One984HOSTING_CSRFTOKEN_COOKIE="$(grep -i '^set-cookie:' "$HTTP_HEADER" | _egrep_o 'csrftoken=[^;]*;' | tr -d ';')"
    export One984HOSTING_SESSIONID_COOKIE
    export One984HOSTING_CSRFTOKEN_COOKIE
    _saveaccountconf_mutable One984HOSTING_Username "$One984HOSTING_Username"
    _saveaccountconf_mutable One984HOSTING_Password "$One984HOSTING_Password"
    _saveaccountconf_mutable One984HOSTING_SESSIONID_COOKIE "$One984HOSTING_SESSIONID_COOKIE"
    _saveaccountconf_mutable One984HOSTING_CSRFTOKEN_COOKIE "$One984HOSTING_CSRFTOKEN_COOKIE"
    return 0
  fi
  return 1
}

_check_credentials() {
  One984HOSTING_Username="${One984HOSTING_Username:-$(_readaccountconf_mutable One984HOSTING_Username)}"
  One984HOSTING_Password="${One984HOSTING_Password:-$(_readaccountconf_mutable One984HOSTING_Password)}"
  if [ -z "$One984HOSTING_Username" ] || [ -z "$One984HOSTING_Password" ]; then
    One984HOSTING_Username=""
    One984HOSTING_Password=""
    _clearaccountconf_mutable One984HOSTING_Username
    _clearaccountconf_mutable One984HOSTING_Password
    _err "You haven't specified 1984Hosting username or password yet."
    _err "Please export as One984HOSTING_Username / One984HOSTING_Password and try again."
    return 1
  fi
  return 0
}

_check_cookies() {
  One984HOSTING_SESSIONID_COOKIE="${One984HOSTING_SESSIONID_COOKIE:-$(_readaccountconf_mutable One984HOSTING_SESSIONID_COOKIE)}"
  One984HOSTING_CSRFTOKEN_COOKIE="${One984HOSTING_CSRFTOKEN_COOKIE:-$(_readaccountconf_mutable One984HOSTING_CSRFTOKEN_COOKIE)}"
  if [ -z "$One984HOSTING_SESSIONID_COOKIE" ] || [ -z "$One984HOSTING_CSRFTOKEN_COOKIE" ]; then
    _debug "No cached cookie(s) found."
    return 1
  fi

  _authget "https://1984.hosting/accounts/loginstatus/"
  if _contains "$_response" '"ok": true'; then
    _debug "Cached cookies still valid."
    return 0
  fi

  _debug "Cached cookies no longer valid. Clearing cookies."
  One984HOSTING_SESSIONID_COOKIE=""
  One984HOSTING_CSRFTOKEN_COOKIE=""
  _clearaccountconf_mutable One984HOSTING_SESSIONID_COOKIE
  _clearaccountconf_mutable One984HOSTING_CSRFTOKEN_COOKIE
  return 1
}

# _acme-challenge.www.domain.com
# Returns
#  _sub_domain=_acme-challenge.www
#  _domain=domain.com
_get_root() {
  domain="$1"
  i=1
  p=1
  while true; do
    h=$(printf "%s" "$domain" | cut -d . -f "$i"-100)

    # not valid
    if [ -z "$h" ]; then
      return 1
    fi

    _authget "https://1984.hosting/domains/soacheck/?zone=$h&nameserver=ns0.1984.is."
    if _contains "$_response" "serial" && ! _contains "$_response" "null"; then
      _sub_domain=$(printf "%s" "$domain" | cut -d . -f 1-"$p")
      _domain="$h"
      return 0
    fi
    p=$i
    i=$(_math "$i" + 1)
  done
  return 1
}

# Usage: _get_zone_id url domain.com
# Returns zone id for domain.com
_get_zone_id() {
  url=$1
  domain=$2
  _htmlget "$url" "$domain"
  _zone_id="$(echo "$_response" | _egrep_o 'zone\/[0-9]+' | _head_n 1)"
  _debug2 _zone_id "$_zone_id"
  if [ -z "$_zone_id" ]; then
    _err "Error getting _zone_id for $2."
    return 1
  fi
  return 0
}

# Add extra headers to request
_authget() {
  export _H1="Cookie: $One984HOSTING_CSRFTOKEN_COOKIE; $One984HOSTING_SESSIONID_COOKIE"
  _response=$(_get "$1" | _normalizeJson)
  _debug2 _response "$_response"
}

# Truncate huge HTML response
# Echo: Argument list too long
_htmlget() {
  export _H1="Cookie: $One984HOSTING_CSRFTOKEN_COOKIE; $One984HOSTING_SESSIONID_COOKIE"
  _response=$(_get "$1" | grep "$2")
  if _contains "$_response" "@$2"; then
    _response=$(echo "$_response" | grep -v "[@]" | _head_n 1)
  fi
  _debug2 _response "$_response"
}

# Add extra headers to request
_authpost() {
  url="https://1984.hosting/domains"
  _get_zone_id "$url" "$_domain"
  csrf_header="$(echo "$One984HOSTING_CSRFTOKEN_COOKIE" | _egrep_o "=[^=][0-9a-zA-Z]*" | tr -d "=")"
  export _H1="Cookie: $One984HOSTING_CSRFTOKEN_COOKIE; $One984HOSTING_SESSIONID_COOKIE"
  export _H2="Referer: https://1984.hosting/domains/$_zone_id"
  export _H3="X-CSRFToken: $csrf_header"
  _response="$(_post "$1" "$2" | _normalizeJson)"
  _debug2 _response "$_response"
}