User:Splarka/fetchredirects.js

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// ==================================================
//  Fetch and Show redirects in content sub (test)
// ==================================================
// Yes, is ugly. This is just a test.
// Someone else do it better.
 
var rdlist = document.createElement('span');
var getReq;
 
addOnloadHook(getRedirectsButton);
function getRedirectsButton() {
  addPortletLink('p-tb','javascript:getRedirects();','get redirects','t-getredirects')
}
 
function getRedirects() {
  rdlist.appendChild(document.createElement('br'));
  rdlist.appendChild(document.createTextNode('fetching...'));
  document.getElementById('contentSub').appendChild(rdlist);
  var url = wgServer + wgScript + '?title=Special:Whatlinkshere/' + wgPageName + '&limit=1000';
  getXML(url,getRedirectsStateChange);
  document.getElementById('t-getredirects').style.display='none';
}
 
function getRedirectsStateChange() {
  switch (getReq.readyState) {
    case 1: break;
    case 2: break;
    case 3: break;
    case 4:
      if (getReq.status == 200) { // OK response
        clearNode(rdlist);
        var txt = getReq.responseText;
        var rdp = /\<a[^>]*>[^<]*\<\/a\> \(redirect page\)/ig;
        rdlist.appendChild(document.createElement('br'));
        rdlist.appendChild(document.createTextNode('Redirects to this page:'));
        rdlist.appendChild(document.createElement('br'));
        var redir = txt.match(rdp);
        if(redir) {
          for(var i=0;i<redir.length;i++) {
          //just a test, should replace with proper DOM if going to be used
          rdlist.innerHTML += redir[i] + '<br>';
          }
        }
      } else {
        rdlist.appendChild(document.createTextNode('** Problem ** ' + getReq.statusText))
      }
      break;
  }
}
 
function clearNode(obj) {
  while(obj.firstChild) obj.removeChild(obj.firstChild);
}
 
function getText(obj) {
  if (obj.nodeType == 3) return obj.nodeValue;
  var txt = new Array();
  var i=0;
  while(obj.childNodes[i]) {
    txt[txt.length] = getText(obj.childNodes[i]);
    i++;
  }
  return txt.join('');
}
 
function getXML(url,func) {
  if (window.XMLHttpRequest) { // Non-IE browsers
    getReq = new XMLHttpRequest();
  } else if (window.ActiveXObject) { // IE
    getReq = new ActiveXObject('Microsoft.XMLHTTP');
  }
  if (getReq) {
    getReq.onreadystatechange = func;
    try {
      getReq.open('GET', url, true);
      getReq.send('');
    } catch (e) {
      alert(e);
    }
  } else {
    alert('XMLHTTPRequest not supported');
  }
}