/*
 * Copyright (C) Sapphirecode - All Rights Reserved
 * This file is part of Utilities which is released under MIT.
 * See file 'LICENSE' for full license details.
 * Created by Timo Hocker <timo@scode.ovh>, March 2020
 */

'use strict';

/**
 * truncates a floating point number
 *
 * @param {number} num number to truncate
 * @param {number} len length to truncate to
 * @returns {number} truncated number
 */
function truncate_decimal (num, len) {
  return Math.round (num * (10 ** len)) / (10 ** len);
}

/**
 * parse json and catch invalid strings
 *
 * @param {string} text input
 * @returns {any} parsed
 */
function try_parse_json (text) {
  try {
    return JSON.parse (text);
  }
  catch (e) {
    // noop
  }
  return null;
}


/**
 * copy an object to prevent modification to the original
 *
 * @param {object} obj object to copy
 * @returns {object} copy
 */
function copy_object (obj) {
  return JSON.parse (JSON.stringify (obj));
}

/**
 * run a regular expression and callback for every result
 *
 * @param regex regular expression
 * @param data data to run on
 * @param func function to execute
 */
function run_regex (regex, data, func) {
  let res = regex.exec (data);
  while (res) {
    func (res);
    res = regex.exec (data);
  }
}



module.exports = {
  truncate_decimal,
  try_parse_json,
  copy_object,
  run_regex
};