_fixRelativeUris()

in Readability.js [457:536]

• 52 lines of code
• 9 McCabe index (conditional complexity)

  _fixRelativeUris(articleContent) {
    var baseURI = this._doc.baseURI;
    var documentURI = this._doc.documentURI;
    function toAbsoluteURI(uri) {
      // Leave hash links alone if the base URI matches the document URI:
      if (baseURI == documentURI && uri.charAt(0) == "#") {
        return uri;
      }

      // Otherwise, resolve against base URI:
      try {
        return new URL(uri, baseURI).href;
      } catch (ex) {
        // Something went wrong, just return the original:
      }
      return uri;
    }

    var links = this._getAllNodesWithTag(articleContent, ["a"]);
    this._forEachNode(links, function (link) {
      var href = link.getAttribute("href");
      if (href) {
        // Remove links with javascript: URIs, since
        // they won't work after scripts have been removed from the page.
        if (href.indexOf("javascript:") === 0) {
          // if the link only contains simple text content, it can be converted to a text node
          if (
            link.childNodes.length === 1 &&
            link.childNodes[0].nodeType === this.TEXT_NODE
          ) {
            var text = this._doc.createTextNode(link.textContent);
            link.parentNode.replaceChild(text, link);
          } else {
            // if the link has multiple children, they should all be preserved
            var container = this._doc.createElement("span");
            while (link.firstChild) {
              container.appendChild(link.firstChild);
            }
            link.parentNode.replaceChild(container, link);
          }
        } else {
          link.setAttribute("href", toAbsoluteURI(href));
        }
      }
    });

    var medias = this._getAllNodesWithTag(articleContent, [
      "img",
      "picture",
      "figure",
      "video",
      "audio",
      "source",
    ]);

    this._forEachNode(medias, function (media) {
      var src = media.getAttribute("src");
      var poster = media.getAttribute("poster");
      var srcset = media.getAttribute("srcset");

      if (src) {
        media.setAttribute("src", toAbsoluteURI(src));
      }

      if (poster) {
        media.setAttribute("poster", toAbsoluteURI(poster));
      }

      if (srcset) {
        var newSrcset = srcset.replace(
          this.REGEXPS.srcsetUrl,
          function (_, p1, p2, p3) {
            return toAbsoluteURI(p1) + (p2 || "") + p3;
          }
        );

        media.setAttribute("srcset", newSrcset);
      }
    });
  },