User:JackSchmidt/JS CatWatch.js

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// Fancy thing to watch all articles in a category

// (c)2007 Jack Schmidt and Kathryn Lybarger available under GPL, BSD, or CC-SA

if(false) {
// This (disabled) code adds a new tab "CatWatch"...
// Which when clicked adds buttons next to all category links...
// Which when clicked lookup how many articles are in the category,
// and when clicked again add those articles to your watchlist
// and then disappears.
// You can try it out. Just add this to your main js file:

// Begin catwatch install snippet

importScript('User:JackSchmidt/JS Ajax.js');
importScript('User:JackSchmidt/JS Watchlist.js');
importScript('User:JackSchmidt/JS CatWatch.js');

$( function () { 
  mw.util.addPortletLink('p-cactions',"javascript:JS_CatWatch.AddThemAll()",
    "CatWatch", "ca-catwatch", "Add 'Watch By Category' buttons");
});

// End snippet

// And then reload an article page.  Careful not to pollute your watchlist.
}


// Code to add a lookup button to a category link,
// which finds all articles in the category, and
// makes a button to add them to your watchlist.
JS_CatWatch = {};
JS_CatWatch.AddLookupButton = function( node, catname ) {
  var but;
  but = document.createElement( "input" );
  but.type="button";
  but.value="Lookup '" + catname + "'";
  but.onclick = JS_CatWatch.LookupFunction( node, but, catname );
  node.parentNode.appendChild( but, node );
}
JS_CatWatch.LookupFunction = function( node, but, catname ) {
  return function() { return JS_CatWatch.Lookup( node, but, catname ); }
}
JS_CatWatch.Lookup = function( node, but, catname ) {
  but.value = "Looking up '" + catname + "'";
  but.onclick = null;
  JS_API(
    { action: "query", list: "categorymembers", cmtitle: catname,
      cmnamespace: "0|14", cmlimit: "500", format: "json" },
    catname,
    JS_CatWatch.CompleteFunction( node, but, catname )
  );
}
JS_CatWatch.CompleteFunction = function( node, but, catname ) {
  return function( id, txt ) { return JS_CatWatch.Complete( node, but, catname, id, txt ); }
}
JS_CatWatch.Complete = function( node, but, catname, id, txt ) {
  var p = eval("(" + txt + ")");
  but.pages = [];
  for ( var member in p["query"]["categorymembers"] ) {
    member = p["query"]["categorymembers"][member];
    but.pages.push( member["title"] );
  }
  but.value = "Watch " + but.pages.length + " arts";
  but.onclick = JS_CatWatch.WatchFunction( node, but, catname );
}
JS_CatWatch.WatchFunction = function( node, but, catname ) {
  return function() { return JS_CatWatch.Watch( node, but, catname ); }
}
JS_CatWatch.Watch = function( node, but, catname ) {
  for( var i = 0; i < but.pages.length ; i++ ) {
    JS_Watchlist.Add( but.pages[i] );
  }
  but.onclick = null;
  but.pages = null;
  but.parentNode.removeChild( but );
}

// This is a little overaggressive, but not too bad.
JS_CatWatch.AddThemAll = function(){
    var prefix = mw.config.get('wgServer') + mw.config.get('wgArticlePath').replace(/\$1/,"");
    var elements = document.getElementsByTagName('a');
    for (var j=1;j<elements.length;j++) {
        if ( (elements[j].href.match(prefix + "Category:") )
            && !(elements[j].href.match("#")) ) {
            JS_CatWatch.AddLookupButton(elements[j], elements[j].href.slice(prefix.length));
        }
    }
}