yoastseo/build/languageProcessing/researches/getLinkStatistics.js

Yoast client-side content analysis

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = _default;
var _checkNofollow = _interopRequireDefault(require("../helpers/link/checkNofollow.js"));
var _getAnchorsFromText = _interopRequireDefault(require("../helpers/link/getAnchorsFromText.js"));
var _getLinkType = _interopRequireDefault(require("../helpers/link/getLinkType.js"));
var _htmlParser = _interopRequireDefault(require("../../languageProcessing/helpers/html/htmlParser"));
function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
/**
 * @typedef {import("../../values/").Paper } Paper
 */

/**
 * @typedef LinkStatistics
 * @type {object}
 * @property {number} total The total number of links found.
 * @property {number} internalTotal The total number of links that are internal.
 * @property {number} internalDofollow The internal links without a nofollow attribute.
 * @property {number} internalNofollow The internal links with a nofollow attribute.
 * @property {number} externalTotal The total number of links that are external.
 * @property {number} externalDofollow The external links without a nofollow attribute.
 * @property {number} externalNofollow The external links with a nofollow attribute.
 * @property {number} otherTotal All links that are not HTTP or HTTPS.
 * @property {number} otherDofollow Other links without a nofollow attribute.
 * @property {number} otherNofollow Other links with a nofollow attribute.
 */

/**
 * Counts the links found in the text.
 *
 * @param {Paper} paper The paper object containing text, keyword and url.
 *
 * @returns {LinkStatistics} The object containing all link types.
 */
function _default(paper) {
  // We remove HTML blocks that should be ignored.
  const filteredText = (0, _htmlParser.default)(paper.getText());
  const anchors = (0, _getAnchorsFromText.default)(filteredText);
  /*
   * We get the site's URL (e.g., https://yoast.com) or domain (e.g., yoast.com) from the paper.
   * In case of WordPress, the variable is a URL. In case of Shopify, it is a domain.
   */
  const siteUrlOrDomain = paper.getPermalink();
  const linkCount = {
    total: anchors.length,
    internalTotal: 0,
    internalDofollow: 0,
    internalNofollow: 0,
    externalTotal: 0,
    externalDofollow: 0,
    externalNofollow: 0,
    otherTotal: 0,
    otherDofollow: 0,
    otherNofollow: 0
  };
  for (let i = 0; i < anchors.length; i++) {
    const currentAnchor = anchors[i];
    const linkType = (0, _getLinkType.default)(currentAnchor, siteUrlOrDomain);
    const linkFollow = (0, _checkNofollow.default)(currentAnchor);
    linkCount[linkType + "Total"]++;
    linkCount[linkType + linkFollow]++;
  }
  return linkCount;
}
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