Quietube Auto-Redirect

By Cyranix — Last update Jun 28, 2009 — Installed 1,574 times.
There are 18 previous versions of this script.
// ==UserScript==
// @name           Quietube Auto-Redirect
// @namespace      cyranix
// @description    Auto-redirect YouTube, Vimeo, and Viddler videos to Quietube.
// @include        *
// ==/UserScript==



// Determines whether the current site is Quietube.
function isQuietube() {
  var quietube = /^http:\/\/(www\.)?quietube\.com\/v\.php\/(.)+/.test(document.URL);

  return quietube;
}

// Determines whether a given URL points to a Quietube-supported video site.
function isSupported(url) {
  var youtube = /^http:\/\/(www\.)?youtube\.com\/watch\?v=(.)+/.test(url);
  var vimeo = /^http:\/\/(www\.)?vimeo\.com\/(\d)+$/.test(url.split("?")[0]);
  var viddler = /^http:\/\/(www\.)?viddler\.com\/explore\/(.)+\/videos\/(.)+/.test(url);
  var bbc = /^http:\/\/(www\.)?bbc\.co\.uk\/iplayer\/episode\/(.)+/.test(url);

  return (youtube || vimeo || viddler || bbc);
}

// Determines whether a given URL should be exempt from redirection. Method extracted in case I want to modify it later.
function preventRedirect(url) {
  var prevent = /redirect=0/.test(url);

  return prevent;
}

// Aggressively converts relevant links to supported video sites to their Quietube counterparts, as a form of "pre-direction".
function convertLinks() {
  var links = document.evaluate("//a[@href]", document, null, XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE, null);
  for (var i = 0; i < links.snapshotLength; i++) {
    var link = links.snapshotItem(i);
    if (isSupported(link.href)) {
      link.href = "http://quietube.com/v.php/" + link.href;
    }
  }
}

// More robust way to get the Original Page link.
function getOriginalPageLink() {
  var arrayLinks = document.getElementsByTagName("a");
  for (var i = 0; i < arrayLinks.length; i++) {
    var current = arrayLinks[i];
    if (current.innerHTML == "Original Page") {
      return current;
    }
  }
}





var doConvert = true; // set to false in order to disable aggressive link modification

// If site is Quietube, alter the Original Page link to include the no-redirect parameter.
if (isQuietube()) {
  var original = getOriginalPageLink();
  original.href = (/youtube\.com/.test(document.URL)) ? original.href + "&redirect=0" : original.href + "?redirect=0";
}

// If site is a supported video site and doesn't have the no-redirect parameter, redirect to Quietube.
else if (isSupported(document.URL) && !preventRedirect(document.URL)) {
  window.location.href = "http://quietube.com/v.php/" + window.location.href;
}

// If site is neither a supported video site nor Quietube, attempt to preemptively alter links to supported video sites.
else if (doConvert) {
  convertLinks();
}