User:Dvorsky~enwiki/catwatch.js

/* Category watch ([[User:ais523/catwatch.js]]); adds entries on the watchlist if a page is
   added to a category (and is still in the category when the watchlist is checked). The entry
   will only appear if there is another page on the watchlist edited that day (if the addition
   was the only change on that day, it's neglected). The recategorisation of a page in a watched
   category will also trigger the watching, even if it's a different category that's added or
   removed (unless the watched category is removed); removals from the watched category can't
   be detected. Categories with more than 100 elements won't be watched for server-load reasons.
 
   Thanks to [[User:TheDJ]] for helping me make this compatible with more browsers and preference
   settings. */
 
//<source lang="javascript">
 
/*function DHTMLloadscript( url ) {
  var e = document.createElement("script");
  e.setAttribute('src', url);
  e.setAttribute('type',"text/javascript");
  e.appendChild( document.createTextNode("") ); // Safari bugfix
  document.getElementsByTagName("head")[0].appendChild(e);
};*/
 
var cwwpajax;
// From [[WP:US]] mainpage (wpajax renamed to cwwpajax)
cwwpajax={
        download:function(bundle) {
                // mandatory: bundle.url
                // mandatory: bundle.async
                // optional:  bundle.onSuccess (xmlhttprequest, bundle)
                // optional:  bundle.onFailure (xmlhttprequest, bundle)
                // optional:  bundle.otherStuff OK too, passed to onSuccess and onFailure
 
                var x = window.XMLHttpRequest ? new XMLHttpRequest() // Firefox, Safari, Opera, IE7
                : window.ActiveXObject ? new ActiveXObject("Microsoft.XMLHTTP") // IE6
                : false;
 
                if (x) {
                        x.onreadystatechange=function() {
                                x.readyState==4 && cwwpajax.downloadComplete(x,bundle);
                        };
                        x.open("GET",bundle.url,bundle.async);
                        x.send(null); 
                }
                return x;
        },
 
        downloadComplete:function(x,bundle) {
                x.status==200 && ( bundle.onSuccess && bundle.onSuccess(x,bundle) || true )
                || ( bundle.onFailure && bundle.onFailure(x,bundle) || alert(x.statusText));
        }
};
 
// Example:
// function dlComplete(xmlreq, data) {
//      alert(data.message + xmlreq.responseText);
// }
//  cwwpajax.download({url:'http://en.wikipedia.org/w/index.php?title=Thresher&action=raw', 
//                   onSuccess: dlComplete, message: "Here's what we got:\n\n" });
 
// End of [[WP:US]] quote
 
function cwOntoWatchlist(xmlreq, data)
{
  var a=xmlreq.responseText;
  var c=data.catname;
  var i;
  var diag="";
  if(a.indexOf("<error>")!=-1) return; //cat is empty, nothing to do here
  if(a.indexOf("<category next=")!=-1) return; //cat has more than 100 elements, so the results will be misleading
  a=a.split("<timestamp>");
  var latesttime=0;
  var latestpage="";
  var temp, temp2;
  for(i=0; i< a.length; i++)
  {
    temp=a[i].indexOf("</timestamp>");
    if(temp!=-1)
    {
      temp=new Number(a[i].substr(0,temp));
      if(temp>latesttime)
      {
        latesttime=temp;
        a[i]=a[i].substr(a[i].indexOf("<title>")+7);
        latestpage=a[i].substr(0,a[i].indexOf("</title>"));
      }
    }
  }
  a=document.getElementsByTagName("h4"); //get dates in the watchlist
  var monthname=new Array();
  monthname['01']="January";
  monthname['02']="February";
  monthname['03']="March";
  monthname['04']="April";
  monthname['05']="May";
  monthname['06']="June";
  monthname['07']="July";
  monthname['08']="August";
  monthname['09']="September";
  monthname['10']="October";
  monthname['11']="November";
  monthname['12']="December";
  latesttime=new String(latesttime);
 
  var mn1, mn2, mn3, mn4;
 
  // Allow for different date styles:
  // January 29, 2001
  mn1=""+monthname[latesttime.substr(4,2)]+" "+new Number(latesttime.substr(6,2))+
      ", "+latesttime.substr(0,4);
  // 29 January 2001
  mn2=""+new Number(latesttime.substr(6,2))+" "+monthname[latesttime.substr(4,2)]+
      " "+latesttime.substr(0,4);
  // 2001 January 29
  mn3=""+latesttime.substr(0,4)+" "+monthname[latesttime.substr(4,2)]+
      " "+new Number(latesttime.substr(6,2));
  // 2001-01-29
  mn4=""+latesttime.substr(0,4)+"-"+latesttime.substr(4,2)+"-"+latesttime.substr(6,2);
 
  i=a.length;
  while(i--)
  {
    if(a[i].innerHTML==mn1||a[i].innerHTML==mn2||a[i].innerHTML==mn3||a[i].innerHTML==mn4)
    {
      diag+=a[i].innerHTML+":";
      temp=a[i].nextSibling.firstChild;
      if(temp==null) temp=a[i].nextSibling.nextSibling.firstChild;
      while(temp!=null)
      {
        diag+=temp.tagname+"!";
        if(temp.tagName!=null)
        if(temp.tagName.toLowerCase()=="li")
        {
          temp2=temp.innerHTML.match(/; ([0-9][0-9]):([0-9][0-9])(:[0-9][0-9])? \. \./);
          temp2=new Number(temp2[1])*100+new Number(temp2[2]);
          diag+=temp2+",";
          if(temp2<new Number(latesttime.substr(8,4))) {temp2=temp; break;}
        }
        temp2=temp; temp=temp.nextSibling;
        if(temp==null) break;
      }
      temp=document.createElement("li");
      if(temp2==null) {return;}
      if(a[i].nextSibling.firstChild!=null) // IE-like whitespace handling
        a[i].nextSibling.insertBefore(temp,temp2);
      else // Firefox-like whitespace handling
        a[i].nextSibling.nextSibling.insertBefore(temp,temp2);
 
      temp.innerHTML="(diff) (hist) . . <a "+
                     "href='http://en.wikipedia.org/wiki/Category:"+
                     encodeURI(c)+
                     "'>Category:"+c+"</a>; "+latesttime.substr(8,2)+":"+latesttime.substr(10,2)+
                     " . . (+ <a "+
                     "href='http://en.wikipedia.org/wiki/"+
                     encodeURI(latestpage)+"'>"+latestpage+"</a> "+
                     "(<a href='http://en.wikipedia.org/w/index.php?title="+encodeURI(latestpage)+
                     "&diff=last'>last</a>))";
      return;
    }
  }
}
 
var WatchedCategories;
 
//An example of a query to check a category would be
//http://en.wikipedia.org/w/query.php?what=category&cptitle=Wikipedia%20protected%20edit%20requests&cplimit=100&cpextended
addOnloadHook(function(){
  //DHTMLloadscript( 'http://en.wikipedia.org/w/index.php?title=User:'+wgUserName
  //  +'/WatchedCategories.js&action=raw&ctype=text/javascript');
  if(wgPageName=="Special:Watchlist")
  {
    if(document.getElementsByTagName("tt").length>0)
    {
      alert("You seem to be using the Javascript-enhanced watchlist, which is incompatible "+
            "with the category watchlist script at present; please uninstall it.");
      return;
    }
    // load the script using AJAX, because DHTML fails in Firefox and document.write fails in Safari
    eval(cwwpajax.download({url:'http://en.wikipedia.org/w/index.php?title=User:'+wgUserName
                               +'/WatchedCategories.js&action=raw&ctype=text/javascript',
                               async:false}).responseText);
    if(WatchedCategories==undefined)
    {
      if(confirm("You don't have a category watchlist yet. Do you want to create one?"))
        location.href='http://en.wikipedia.org/w/index.php?title=User:'+wgUserName+
        '/WatchedCategories.js&action=edit&preload=User:Ais523/WatchedCategoriesTemplate.js';
    }
    else
    {
      var i;
      for(i=0; i<WatchedCategories.length; i++)
      {
        var a=WatchedCategories[i];
        cwwpajax.download({url:'http://en.wikipedia.org/w/query.php?what=category&cptitle='
                           +encodeURI(a)+
                           '&cplimit=100&cpextended&format=xml', onSuccess:cwOntoWatchlist,
                           catname:a, async:true});
      }
    }
  }
});
 
//</source>
//[[Category:Wikipedia scripts]]