#!/usr/bin/env bash
# Usage: {script} TLD_FILENAME
# Update list of TLD

set -euo pipefail

declare -r IFS=$'\n'
declare -r URL="https://data.iana.org/TLD/tlds-alpha-by-domain.txt"
declare -r TEMPORARY_LIST_FILE=$(mktemp)
declare -r TEMPORARY_RULE_FILE=$(mktemp)
declare -r TLD_FILENAME="${1}"

echo "Downloading '${URL}'"
curl -s -L "${URL}" -o "${TEMPORARY_LIST_FILE}"

echo "Updating '${TLD_FILENAME}'"
{
  sed -nE '/^</,/^\{/p' "${TLD_FILENAME}"
  echo "    // List extracted from ${URL}"
  grep '^#' "${TEMPORARY_LIST_FILE}" | sed 's,#,    //,'
  echo "    protected \$tldList = ["
  grep -v '^#' "${TEMPORARY_LIST_FILE}" |
    tr '[A-Z]' '[a-z]' |
    sed -E "s,^,',; s/$/', /" |
    tr -d '\n' |
    fold -w 72 -s |
    sed 's,^,        ,g; s, $,,g'
  echo
  echo "    ];"
  echo
  sed -nE '/^    public function/,/^}/p' "${TLD_FILENAME}"
} > "${TEMPORARY_RULE_FILE}"

mv "${TEMPORARY_RULE_FILE}" "${TLD_FILENAME}"