/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

export const BYTES_IN_KILOBYTE = 1000;
export const BYTES_IN_MEGABYTE = 1000000;

export const BYTES_IN_KIBIBYTE = 1024;
export const BYTES_IN_MEBIBYTE = 1048576;

export const MeasurementUtils = {
  /**
   * Rounds byte sizes of user files in order to provide protection
   * against fingerprinting.
   *
   * @param {number} bytes Number of bytes to fuzz
   * @param {number} nearest Nearest number of bytes to round to
   * @returns {number} Number of bytes rounded to the `nearest` granularity
   *
   * @example fuzzByteSize(1500, 1000) === 2000
   * @example fuzzByteSize(1001, 1000) === 1000
   * @example fuzzByteSize(1024, 10) === 1020
   * @example fuzzByteSize(512, 1000) === 1000
   * @example fuzzByteSize(256, 1000) === 1000
   */
  fuzzByteSize(bytes, nearest) {
    const fuzzed = Math.round(bytes / nearest) * nearest;
    return Math.max(fuzzed, nearest);
  },
};