/* Doorverwijspagina lookup-script
http://nl.wikipedia.org/wiki/Gebruiker:Silver Spoon/dpzoeker.js
Dit script is een vertaling naar het Nederlands van het "Disambiguation lookup script, version [0.2.8]"-script
van User:Splarka dat op de Engelstalige Wikipedia gebruikt wordt. Zie: http://en.wikipedia.org/wiki/User:Splarka/dabfinder.js

In deze Nederlandse versie van het script is het highlighten van redirects verwijderd aangezien een ieder dit simpel aan zijn
eigen css instellingen kan toevoegen.

Hieronder staan de oorspronkelijke Engelstalige-gegevens van het script:
 
Notes:
* Uses the API using head/appendchild(script) and callback to avoid ajax.
* Alt command finds and hilights redirects with simple CSS append (class="mw-redirect").
* Per http://svn.wikimedia.org/viewvc/mediawiki?view=rev&revision=37270 we are limited to 500 subtemplates
** The query-continue seems to work fine even as a generator. Built a re-query system to do this automatically.
 
Operation:
* Adds portlet button (or works with URI parameter &finddab=true)
** Makes call to MediaWiki:Disambiguationspage links, generates array of these.
*** Makes call to generator=links / prop=templates on page title.
**** Builds array of registered links that link to disambiguation pages (that contain a disambiguation template).
***** Iterates over all <a> link objects on page, matching any that link to disambiguation, and applies green border.
***** .dablink descendant links are given a dashed border, all other found links are given a solid border.
*** Repeats call with tlcontinue if more than 500 templates have been returned in previous query.
 
This is a bit messy but at the time was the easiest and most thorough way to do it I could think of.
Of course, a bot might be much more efficient, but this is handy for quick on-the-fly live checking.
 
To do:
* test it
* centralized link list in contentSub?
* test unicode support
*/

var dabnames = new Array();
var dabfound = 0;
if(mw.config.get('wgNamespaceNumber') != -1) $(findDABsButton)
function findDABsButton() {
  if(!queryString('oldid') && !queryString('diff') && (mw.config.get('wgAction') == 'view' || mw.config.get('wgAction') == 'purge')) {
    mw.util.addPortletLink('p-tb','javascript:findDABs()','Vind doorverwijspagina\'s','t-dab');
    if(queryString('finddab')=='true') findDABs();
  }
}
 
function findDABs() {
  var dab = document.getElementById('t-dab');
  if(dab) injectSpinner(dab,'dab');
  var url = wgScriptPath + '/api.php?maxage=86400&smaxage=86400&action=query&rawcontinue=1&prop=links&pllimit=500&tlnamespace=10&indexpageids&format=json&callback=findDABsCB&titles=MediaWiki:Disambiguationspage';
  mw.loader.load(url);
}
 
function findDABsCB(obj) {
  if(!obj['query'] || !obj['query']['pages'] || !obj['query']['pageids']) return
  var links = obj['query']['pages'][obj['query']['pageids'][0]]['links']
  if(!links) return
  for(var i=0;i<links.length;i++) {
    dabnames.push(links[i]['title']);
  }
  findDABsQuery();
}
 
function findDABsQuery(qcont) {
  var url = mw.config.get('wgScriptPath') + '/api.php?maxage=300&smaxage=300&action=query&rawcontinue=1&redirects&generator=links&gpllimit=500&prop=templates&tllimit=500&indexpageids&format=json&callback=findDABlinksCB&titles=' + encodeURIComponent(mw.config.get('wgPageName'));
  if(qcont) url += '&tlcontinue=' + encodeURIComponent(qcont)
  mw.loader.load(url);
}

function findDABlinksCB(obj) {
  var dablinks = new Array();
  if(!obj['query'] || !obj['query']['pages'] || !obj['query']['pageids']) return
  mw.util.addCSS('.dablink-found {background-color: #E6E6FA; border: 2px solid #6A5ACD}\n .dablink .dablink-found {background-color:#E6E6FA; border: 2px solid #6A5ACD}');
 
  var ids = obj['query']['pageids'];
  var links = new Array()
  for(var i=0;i<ids.length;i++) {
    var templates = obj['query']['pages'][ids[i]]['templates'];
    if(!templates) continue
    for(var j=0;j<templates.length;j++) {
      var tpl = templates[j]['title'];
      for(var k=0;k<dabnames.length;k++) {
        if(tpl == dabnames[k]) {
          dablinks.push(obj['query']['pages'][ids[i]]['title']);
          continue;
        }
      }
    }
  }
  if(obj['query']['redirects']) {
    var dablen = dablinks.length;
    var redirects = obj['query']['redirects'];
    if(redirects) {
      for(var i=0;i<redirects.length;i++) {
        for(var j=0;j<dablen;j++) {
          if(obj['query']['redirects'][i]['to'] == dablinks[j]) {
            dablinks.push(obj['query']['redirects'][i]['from']);
            continue;
          }
        }
      }
    }
  }
  var docobj = document.getElementById('bodyContent') || document.getElementById('content') || document.body;
  var links = docobj.getElementsByTagName('a')
  for(var i=0;i<links.length;i++) {
    for(var j=0;j<dablinks.length;j++) {
      var dablink = dablinks[j].replace(/ /g,'_');
      var chklink = (links[i].hasAttribute('href')) ? links[i].getAttribute('href', 2).replace(/\#.*/,'') : ''
      chklink = chklink.replace(mw.config.get('wgArticlePath').replace(/\$1/,''),'');
      chklink = decodeURIComponent(chklink);
      if(chklink == dablink && links[i].className.indexOf('dablink-found') == -1) {
        links[i].className += ' dablink-found';
        dabfound++;
      }
    }
  }
 
  var dab = document.getElementById('t-dab');
  if(obj['query-continue'] && obj['query-continue']['templates']) {
    if(dab) {
      dab.appendChild(document.createElement('br'));
      dab.appendChild(document.createTextNode('zoeken...'));
    }
    findDABsQuery(obj['query-continue']['templates']['tlcontinue']);
  } else {
    if(dab) {
      removeSpinner('dab');
      dab.appendChild(document.createElement('br'));
      if(dabfound > 0) {
        var span = document.createElement('span');
        span.appendChild(document.createTextNode(dabfound + ' links naar DPs gevonden.'));
        span.className = 'dablink-found';
        dab.appendChild(span);
      } else {
        dab.appendChild(document.createTextNode('Geen DP-links gevonden.'));
      }
    } else {
      alert(dabfound + ' links naar DPs gevonden.');
    }
  }
}
 
function queryString(p) {
  var re = RegExp('[&?]' + p + '=([^&]*)');
  var matches;
  if (matches = re.exec(document.location)) {
    try { 
      return decodeURI(matches[1]);
    } catch (e) {
    }
  }
  return null;
}