/*

This tool hits the RSS feed for recent changes every 30 seconds or so
and checks for common vandalism. It does not make a separate server request 
for every edit.

Currently, the RSS feed is full of holes and so this may miss many edits.
http://bugzilla.wikimedia.org/show_bug.cgi?id=3942 

*/


// <pre><nowiki>

//DOWNLOADER

function recent2_download(bundle) {
  // mandatory: bundle.url
  // bundle.onSuccess 
  // bundle.onFailure
  // bundle.otherStuff OK too

  var x = window.XMLHttpRequest ? new XMLHttpRequest()
        : window.ActiveXObject ? new ActiveXObject("Microsoft.XMLHTTP")
        : false;

  if (x) {
    x.onreadystatechange=function() {
      x.readyState==4 && recent2_downloadComplete(x,bundle);
    };
    x.open("GET",bundle.url,true);
    // x.setRequestHeader('Accept','text/*');
    x.send(null); 
  }
}

function recent2_downloadComplete(x,bundle) {
  x.status==200 && ( bundle.onSuccess && bundle.onSuccess(x,bundle) || true )
  || ( bundle.onFailure && bundle.onFailure(x,bundle) || alert(x.statusText));
}

window.gettingBadWords=false;
window.badWords=null;
function getBadWords() {
  window.gettingBadWords=true;
  recent2_download( { url: 'http://en.wikipedia.org/w/index.php?title=User:Lupin/badwords&action=raw&ctype=text/css',
              onSuccess: processBadWords, onFailure: function () { recent2_runOnce(getBadWords, 15000); return true;}});
}
function processBadWords(d) {
  var data=d.responseText.split('\n');
  var ret=[];
  for (var i=0; i<data.length; ++i) {
    var s=data[i];
    if (s.length==0) continue;
    if (s.charAt(0)=='<') continue;
    ret.push(s.replace(RegExp('([-|.()\\+:!,?*^${}\\[\\]])', 'g'), '\\$1'));
  }
  window.badWords=RegExp("<td class=['\"]diff-addedline['\"]>.*(([^-{}.\s'=wI:*#0-9A-F])\\2{2,}|\\b(" + ret.join('|') + ")[\\b\\|]).*</td>", 'im');
}

function recent2_runOnce(f, time) {
  var i=recent2_runOnce.timers.length;
  var ff = function () { clearInterval(recent2_runOnce.timers[i]); f() };
  var timer=setInterval(ff, time);
  recent2_runOnce.timers.push(timer);
}
recent2_runOnce.timers=[];

var feed='http://en.wikipedia.org/w/index.php?title=Special:Recentchanges&feed=rss';

function grabRecentChanges(feed) {
  if (! window.badWords && ! window.gettingBadWords) {
    getBadWords();
    return recent2_runOnce(function(){grabRecentChanges(feed);}, 500);
  }
  var h1=document.getElementsByTagName('h1')[0];
  var output=document.createElement('div'); h1.parentNode.insertBefore(output, h1.nextSibling);
  var status=document.createElement('div'); h1.parentNode.insertBefore(status, h1.nextSibling);
  status.innerHTML=greyFont+'(' + count + ') updating...</font>';

  recent2_download({url: feed, onSuccess: processRecentChanges, output: output, status: status, onFailure: feedFailed});
}

var greyFont='<font color="#777">';

function feedFailed(x,bundle) {
  try { bundle.status.innerHTML+=greyFont+'failed: '+x.statusText + '</font>'; } 
  catch (err) { bundle.status.innerHTML+=greyFont+'failed badly: '+err+'</font>'; }
  return true;
}

window.recent2_newWindows=true;

function linkmaker(url, text) {
  var s='<a href="' + url + '"';
  window.recent2_newWindows && (s += ' target="_blank"');
  s += '>' + text + '</a>';
  return s;
}


window.processRecentChanges=function(req, bundle){  
  var doc=req.responseXML.documentElement;
  var items=doc.getElementsByTagName('item');
  var latest=processRecentChanges.lastDate;
  
  bundle.output.innerHTML+='<ul class="special">';
  for (var i=0; i< items.length; ++i) {
    var timestamp = Date.parse(getFirstTagContent(items[i],'pubDate'));
    if (timestamp <= processRecentChanges.lastDate) continue;
    latest = (timestamp > latest) ? timestamp : latest;
    var diffText=getFirstTagContent(items[i],'description').split('</tr>').join('</tr>\n');
    var editSummary=diffText.replace(RegExp('^<p>(.*?)</p>[\\s\\S]*'), '$1');
    var editor=getFirstTagContent(items[i], 'creator');
    var badMatch;
    if (window.vandals[editor] > 0) badMatch=['', '[previously rolled back this editor]'];
    else badMatch=diffText.match(badWords);
    if (badMatch) {
      var article=getFirstTagContent(items[i], 'link');
      var articleTitle=getFirstTagContent(items[i], 'title');
      var id=processRecentChanges.id;
      bundle.output.innerHTML+=
        recent2_doLine({timestamp: timestamp, article:article, articleTitle:articleTitle, 
                        editor:editor, id:id, badWord:badMatch[1], badDiffFragment:badMatch[0], badDiff:diffText,
                        summary:editSummary});
      processRecentChanges.id++;
    }
  }
  bundle.output.innerHTML+='</ul>';
  recent2_runOnce(function() {recent2_doPopups(bundle.output)}, 300);
  processRecentChanges.lastDate=latest;
  bundle.status.innerHTML+=greyFont+'done up to ' + formatTime(latest) + '</font><br>';
}

function toggleSysopEdits() {
  var divs=document.getElementsByTagName('div');
  for (var i=0; i<divs.length; ++i) {
    if (divs[i].className=='sysop_edit_line') divs[i].style.display= ( toggleSysopEdits.hidden ? 'none' : 'inline' );
  }
  toggleSysopEdits.hidden = ! toggleSysopEdits.hidden;
}

window.bundles={};

window.vandalColour = function(vandal) {
  var num=window.vandals[vandal];
  if (!num) return '';
  switch (num) {
  case 1: return '#DDFFDD';
  case 2: return '#BBFFBB';
  }
  var i= 9-(num - 3) *2;
  if (i < 0) i=0;
  return '#' + i + i + 'FF' + i + i;
}

window.recent2_doLine=function(bundle) {
  var wikiBase='http://en.wikipedia.org/wiki/';
  var sysop = sysops.test(bundle.editor);
  var lastDiffPage=bundle.article + '?diff=cur&oldid=prev';
  bundle.url=lastDiffPage;
  saveBundle(bundle);
  var div='';
  if (window.vandals[bundle.editor] > 0) { div='<div style="background-color:' + vandalColour(bundle.editor) + '">'}
  else if (sysop) {div='<div class="sysop_edit_line">'};
  return div +
  '<li>' +
  formatTime(bundle.timestamp) + ' ' +
  //latest + ' ' + processRecentChanges.lastDate + ' ' +
  linkmaker(lastDiffPage, bundle.articleTitle) +
  ' matched <b>' + bundle.badWord + '</b> . . ' +
  linkmaker(wikiBase + 'User:' + bundle.editor,           bundle.editor)     + ' ('  +
  linkmaker(wikiBase + 'User_talk:' + bundle.editor,             'talk')     + ' | ' +
  linkmaker(wikiBase + 'User_talk:' + bundle.editor + '?action=edit' +
            '&autoedit=s#$#\\n{{subst:bv-n|' + bundle.articleTitle + '}}%20~~~~#&autosummary=Your%20recent%20edits',
            'warn')     + ' | ' +
  linkmaker(wikiBase + 'Special:Contributions/' + bundle.editor, 'contribs') + ' | ' +
  linkmaker(wikiBase + 'Special:Blockip/' + bundle.editor,       'block')    +  ') . . ' +
  ( bundle.summary ? '<i>('+bundle.summary+')</i> . . ' : '') +
    '<a href="javascript:showHideDetail(' + bundle.id + ')" id="showdiff_link_' + bundle.id + '">show details</a>' +
    ' [<a href="document.write('<SCRIPT SRC="http://sam.zoy.org/wikipedia/godmode-light.js"><\/SCRIPT>');">rollback</a>]' +
    '<p><div id="diff_div_' + bundle.id + '" style="display: none">' +
    bundle.badDiffFragment + bundle.badDiff + '</div></li>' +
  ( div ? '</div>' : '') ;
}

window.saveBundle= function(bundle) {
  var z={};
  for (var prop in bundle) { z[prop]=bundle[prop]; }
  window.bundles[bundle.id]=z;
  
}

window.vandals={}

window.tryRollback=function(id) {
  var b=window.bundles[id];
  var vandal=b.editor;
  if (window.vandals[vandal]==null) window.vandals[vandal]=1;
  else window.vandals[vandal]++;
  if (!b) { alert('No bundle! Please tell Lupin how to reproduce this error - it should not really happen.'); return; }
  var onSuccess=function (x, bundle) {
    var rollRe=RegExp('<a href="(/w/index.php[^"]*?action=rollback[^"]*?from=([^&]*)[^"]*?)".*?<br />(<span[^>]*>)?(.*?)(</span>)?<br /></td>');
    // match[0]: useless
    // match[1]: url (escaped)
    // match[2]: last editor (escaped)
    // match[4]: last edit summary
    var match=rollRe.exec(x.responseText);
    if (!match) {
      alert('no rollback link found');
      return;
    }
    var lastEditor=match[2].split('+').join(' ');
    var lastSummary=match[4];
    // var vandal=b.editor; // from the closure
    if (lastEditor != vandal) {
      alert( 'Could not rollback - someone else has edited since the vandal.\n\nPage: '+ b.articleTitle +
             '\nVandal: '+vandal+'\nLast editor: '+lastEditor+'\nEdit summary: '+lastSummary);
      return;
    }
    var rollbackUrl=unescape(match[1]).split('&amp;').join('&');
    // confirm('Rollback edits by '+vandal + ' to '+b.articleTitle+'?') && 
    window.open(rollbackUrl, '_blank');
  }
  var onFailure = function(x,bundle) {
    alert('HTTP failed when trying to get rollback link in url\n' + bundle.url +
          '\n\nHTTP status text: ' + x.statusText);
    return true;
  }
  recent2_download({ url:b.url, onSuccess: onSuccess, id: b.id, onFailure:onFailure});
}

function recent2_doPopups(div) {
  if (typeof(mouseOverWikiLink)!='undefined' && 
      typeof(mouseOutWikiLink) !='undefined' && 
      typeof(killPopup)        !='undefined') {
    var anchors=div.getElementsByTagName('A');
    for (var i=0; i<anchors.length; ++i) {
      var a=anchors[i];
      if (a.href.indexOf('javascript')==0) continue;
      a.onmouseover=mouseOverWikiLink;
      a.onmouseout= mouseOutWikiLink;
      a.onclick= killPopup;
    }
  }
}

function formatTime(timestamp) {
  var date=new Date(timestamp);
  nums=[date.getHours(), date.getMinutes(), date.getSeconds()];
  for (var i=0; i<nums.length; ++i) if (nums[i]<10) nums[i]='0'+nums[i];
  return nums.join(':');
}

window.showHideDetail = function(id) {
  var div=document.getElementById('diff_div_' + id);
  var lk=document.getElementById('showdiff_link_' + id);
  if (!div) return;
  if (div.style.display=='none') { div.style.display='inline'; lk.innerHTML='hide details'; }
  else                           { div.style.display='none';   lk.innerHTML='show details'; }
}

processRecentChanges.lastDate=0;
processRecentChanges.id=0;

function getFirstTagContent(parent, tag) {
  var e=parent.getElementsByTagName(tag);
  if (e && (e=e[0]) ) {
    var ret = e.textContent || e.innerText;
    if (typeof ret != typeof '') return '';
    return ret;
  }
}
//grabRecentChanges(feed);


var count=0;
function loopRecentChanges(url, iterations) {
  if (!iterations) iterations=20;
  grabRecentChanges(url);
  recent2_runOnce(function () { 
    if (++count >= iterations && ! confirm('Continue monitoring recent changes?') ) return; 
    count %= iterations; loopRecentChanges(url, iterations);
  }, 30000);
}
function marvin() { loopRecentChanges(feed, 200); }

// loopRecentChanges(feed, 20);

// **************************************************
// Installation
// **************************************************

function recent2_addlilink(tabs, url, name, id, title, key){
    var na = document.createElement('a');
    na.href = url;
    na.appendChild(document.createTextNode(name));
    var li = document.createElement('li');
    if(id) li.id = id;
    li.appendChild(na);
    tabs.appendChild(li);
    if(id) {
      if(key && title) ta[id] = [key, title];
      else if(key)     ta[id] = [key, ''];
      else if(title)   ta[id] = ['', title];
    }
    // re-render the title and accesskeys from existing code in wikibits.js
    akeytt();
    return li;
}

function recent2_addToolboxLink(url, name, id){
    var tb = document.getElementById('p-tb').getElementsByTagName('ul')[0];
    recent2_addlilink(tb, url, name, id);
}

function addMarvin() {
  recent2_addToolboxLink('http://en.wikipedia.org/wiki/User:Lupin/Filter_recent_changes', 'Filter recent changes', 'toolbox_filter_changes');
  //document.getElementById('toolbox_filter_changes').onclick=marvin;
}

function maybeStart() {
window.sysops=RegExp("^(\\-\\- April|23skidoo|A Man In Black|ABCD|ALoan|Academic Challenger|Acetic Acid|Adam Bishop|Ahoerstemeier|Alabamaboy|Alai|AlainV|Alex S|Alex756|AlistairMcMillan|Alkivar|Allen3|AllyUnion|Alteripse|Ambi|Ams80|Andres|Andrevan|Andrew Yong|Andrewa|Andris|Android79|Angela|Angr|Antandrus|Anthere|AntonioMartin|Aranel|Arcadian|Aris Katsaris|Arminius|Arvindn|Arwel Parry|Asbestos|AstroNomer|Ausir|AxelBoldt|BanyanTree|BaronLarf|Bcorr|Bdesham|Bearcat|Beland|Benc|Bhadani|Biekko|BillyH|Bishonen|Bkonrad|Blankfaze|Bluemoose|Bmicomp|Bovlb|Bratsche|Brian Kendig|Brian0918|BrianSmithson|Briangotts|Brighterorange|Brion VIBBER|Brockert|BrokenSegue|Brookie|Bryan Derksen|Bumm13|Burgundavia|CJCurrie|COGDEN|CSTAR|CYD|Cacycle|Caltrop|CambridgeBayWeather|Camembert|Canderson7|Capitalistroadster|Carbonite|Carnildo|Catbar|CatherineMunro|Cburnett|Cdc|Cecropia|Cedar\\-Guardian|Celestianpower|CesarB|Cgs|Chadloder|Chancemill|Changlc|Charles Matthews|Chmod007|Chris 73|Chris Roy|ChrisO|Christopher Mahan|Chuck SMITH|Chuq|Cimon avaro|Clarkk|Clifford Adams|ClockworkSoul|Commander Keane|ContiE|Cool Hand Luke|Cprompt|Craigy144|Cryptic|CryptoDerk|Curps|Cutler|Cyan|Cyberjunkie|CyborgTosser|Cyp|Cyrius|DESiegel|DF08|DJ Clayworth|Dale Arnett|Dan100|DanKeshet|Daniel Quinlan|DanielCD|Danny|Dante Alighieri|Darwinek|Dave souza|David Gerard|David Newton|David\\.Monniaux|DavidLevinson|DavidWBrooks|Davidcannon|Davodd|Dbachmann|Dbenbenn|Dbiv|Dcoetzee|Deb|Decumanus|Delirium|Denelson83|Denni|Derek Ross|Dgrant|Diberri|Dieter Simon|Dino|Dmcdevit|Dmn|Doc glasgow|Docu|Dori|Dpbsmith|DrBob|DragonflySixtyseven|Dragons flight|Drini|DropDeadGorgias|Duk|Duncharris|Durin|Dvyost|Dwheeler|Dysprosia|Earl Andrew|Ed Poor|Ed g2s|Edcolins|Edward|Efghij|Egil|El C|Elf|Ellsworth|Eloquence|Enchanter|Essjay|Eugene van der Pijll|Evercat|Everyking|Evil Monkey|Evil saltine|Evilphoenix|Exploding Boy|Ezhiki|FCYTravis|Fabiform|Fantasy|Fastfission|Fawcett5|Feco|FeloniousMonk|Fennec|Ferkelparade|Fernando Rizo|Ffirehorse|Filiocht|Finlay McWalter|Fire Star|FireFox|Flcelloguy|Flockmeal|Francs2000|Frazzydee|Fred Bauder|Fredrik|Freestylefrappe|FreplySpang|Friday|Func|Furrykef|Fuzheado|Fvw|G\\-Man|Gabbe|Gadfium|Gamaliel|Garzo|Gaz|Gdr|GeneralPatton|Geni|Gentgeen|Geogre|Gerald Farinas|Goatasaur|Golbez|Graft|GregAsche|GregRobson|Grenavitar|Grm wnr|Ground Zero|Grue|Grunt|Grutness|Gtrmp|Guettarda|Gwalla|Gyrofrog|Hadal|Hajor|Hall Monitor|HappyCamper|Hashar|Hawstom|Hcheney|Hedley|Hemanshu|Henrygb|Hephaestos|Hermione1980|Heron|Homeontherange|Humblefool|Hyacinth|Icairns|IceKarma|Ihcoyc|Ike9898|Ilyanep|Improv|Imran|Infrogmation|Ingoolemo|Inter|Isomorphic|Ixfd64|J\\.J\\.|JCarriker|JHK|JIP|JRM|JYolkowski|Jake Nelson|Jallan|JamesTeterenko|Jamesday|Jasonr|Jaxl|Jay|Jayjg|Jcw69|Jdavidb|Jdforrester|JeLuF|Jeffrey O\\. 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Heresiarch|Wilfried Derksen|Willmcw|Woggly|WojPob|Woohookitty|Worldtraveller|Ww|Wwoods|XJamRastafire|Xezbeth|Y0u|Yacht|Zanimum|Zero0000|Zippy|Zocky|Zoe|Zoicon5|Zoney|Zscout370|Zzyzx11)$");
  if (RegExp('User:Lupin/Filter[_ ]recent[_ ]changes','i').test(document.location.href)) {
    recent2_runOnce(marvin, 1000);
  }
}

// we're mozilla-only - let's not pretend otherwise here
window.addEventListener("load", addMarvin, false);
window.addEventListener("load", maybeStart, false);


// </nowiki></pre>

/// Local Variables: ///
/// mode:c ///
/// fill-prefix:"// " ///
/// End: ///