'use strict';

const assert = require('node:assert');
const { URLSerializer } = require('../fetch/data-url');
const { isValidHeaderName } = require('../fetch/util');

/**
 * @see https://url.spec.whatwg.org/#concept-url-equals
 * @param {URL} A
 * @param {URL} B
 * @param {boolean | undefined} excludeFragment
 * @returns {boolean}
 */
function urlEquals(A, B, excludeFragment = false) {
  const serializedA = URLSerializer(A, excludeFragment);

  const serializedB = URLSerializer(B, excludeFragment);

  return serializedA === serializedB;
}

/**
 * @see https://github.com/chromium/chromium/blob/694d20d134cb553d8d89e5500b9148012b1ba299/content/browser/cache_storage/cache_storage_cache.cc#L260-L262
 * @param {string} header
 */
function getFieldValues(header) {
  assert(header !== null);

  const values = [];

  for (let value of header.split(',')) {
    value = value.trim();

    if (isValidHeaderName(value)) {
      values.push(value);
    }
  }

  return values;
}

module.exports = {
  urlEquals,
  getFieldValues,
};