//  _________________________________________________________________________________________
// |                                                                                         |
// |                    === WARNING: GLOBAL GADGET FILE ===                                  |
// |                  Changes to this page affect many users.                                |
// | Please discuss changes on the talk page or on [[Wikipedia_talk:Gadget]] before editing. |
// |_________________________________________________________________________________________|
//
// Imported from version 195439463 as of March 3, 2008 from [[User:Splarka/contribsrange.js]]
// See notes below

/* Special:Contributions Wildcard/CIDR lookup, version [0.1.4]
Originally from: http://en.wikipedia.org/wiki/User:Splarka/contribsrange.js

Notes:
* Uses the API (Requires http://svn.wikimedia.org/viewvc/mediawiki?view=rev&revision=31312), which is faster than most CIDR contrib tools.
* Currently uses a GET json via <script src=""> to avoid ajax problems.
* Only currently works if submitted (or called by URL parameter, eg Special:Contributions/User).
** Checks namespace and date options in form.
* Uses: Submit any IP CIDR range /16 or from /24 to /32. Submit any string (at least 3 characters) with a suffixed asterisk.
** eg: [123.123.123.0/24 ] or [123.123.123.* ] or [Willy* ].
** NOTE: Currently seems broken with spaces in the search string. Possibly a fault of the API. %20,+,_ don't work

To do:
* Sortable by address? (not useful until pagination is available).
* More like normal Special:Recentchanges (hist)(diff) blah blah blah (except talk page existence for red/blue link) with BiDi characters?
* Option to refresh on page? (not really needed, but might be more handy than onload action only).
* Respect limit in user prefs? frm.limit.value ?
*/

if(wgCanonicalSpecialPageName == 'Contributions') { 
  addOnloadHook(prefixContribsInit);
  var prefixlimit = 500;
  var frm = ''; //global
}

function prefixContribsInit() {
  var show = (document.getElementById('contentSub')) ? document.getElementById('contentSub') : document.getElementById('topbar')
  show.appendChild(document.createTextNode(' \u2022 Javascript-enhanced contributions lookup enabled. You may enter a CIDR range or append an asterisk to do a prefix search.'))
  frm = document.getElementsByTagName('form')[0];
  if(!frm.target) return;

  //general optionlets independant of type of search.
  var opt_ns = (parseInt(frm.namespace[frm.namespace.selectedIndex].value) > -1) ? '&ucnamespace=' + frm.namespace[frm.namespace.selectedIndex].value : '';
  var opt_ts = '';
  if(queryString('ucstart')) {
    opt_ts = '&ucstart=' + queryString('ucstart');
  } else {
    var m = '' + frm.month.selectedIndex; 
    var y = frm.year.value;
    if(m.length == 1) m = '0' + m
    if(y > 2000 && y < 2100) opt_ts = '&ucstart=' + y + '-' + m + '-01T00:00:00Z'
  }
  var options = opt_ns + opt_ts;

  var patternCIDR = /(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\/(2[4-9]|3[0-2]|16)/i ;
  var patternWild = /^.{3,}\*$/i ;
  if(frm.target.value.search(patternCIDR) == 0) {
    prefixContribsStartbox(frm.parentNode);
    var cidr = frm.target.value.match(patternCIDR)[0];
    var range = cidr.match(/[^\/]\d{1,2}$/i)[0];
    if(range == 24 || range == 16) {
      //prefixable CIDR, lets do-er
      if(range == 24) {
        cidr = cidr.match(/\d{1,3}\.\d{1,3}\.\d{1,3}\./)[0];
      } else {
        cidr = cidr.match(/\d{1,3}\.\d{1,3}\./)[0];
      }
      var url = wgScriptPath + '/api.php?action=query&format=json&callback=prefixContribs&list=usercontribs' + options + '&uclimit=' + parseInt(prefixlimit) + '&ucuserprefix=' + cidr;
      prefixContribsCall(url);
    } else {
      //complex CIDR, lets figure it out
      var oct3 = cidr.match(/\.\d{1,3}\//i)[0].replace(/(\.|\/)/g,'');
      cidr = cidr.match(/\d{1,3}\.\d{1,3}\.\d{1,3}\./)[0];
      var num = Math.pow(2,32 - range);
      var start = oct3 - oct3 % num;
      var url = wgScriptPath + '/api.php?action=query&format=json&callback=prefixContribs&list=usercontribs' + options + '&uclimit=' + parseInt(prefixlimit) + '&ucuser=';
      for(var i=start;i<=start + num;i++) {
        url += '' + cidr + i;
        if(i != start + num) url += '|'
      }
      prefixContribsCall(url);
    }
  } else if(frm.target.value.search(patternWild) == 0) {
    //very simple wildcard, lets do-er
    prefixContribsStartbox(frm.parentNode);
    var prefix = frm.target.value.replace(/\*$/,'');
    prefix = prefix.substr(0,1).toUpperCase() + prefix.substr(1);
    var url = wgScriptPath + '/api.php?action=query&format=json&callback=prefixContribs&list=usercontribs' + options + '&uclimit=' + parseInt(prefixlimit) + '&ucuserprefix=' + prefix;
    prefixContribsCall(url);
  }
}

function prefixContribsStartbox(parent) {
  var res = document.createElement('div');
    res.setAttribute('id','results-from-CIDR');
    res.style.border = '1px solid black';
    res.style.padding = '.5em';
    var prog = document.createElement('img');
    prog.setAttribute('id','prefixcontribs-prog');
    prog.setAttribute('src',stylepath + '/common/images/spinner.gif');
    res.appendChild(prog);
  parent.appendChild(res);
}

function prefixContribsCall(url) {
  var scriptElem = document.createElement('script');
  scriptElem.setAttribute('src',url);
  scriptElem.setAttribute('type','text/javascript');
  document.getElementsByTagName('head')[0].appendChild(scriptElem);
}

function prefixContribs(obj) {
  if(!obj['query'] || !obj['query']['usercontribs']) return
  var prog = document.getElementById('prefixcontribs-prog');
  if(prog) prog.parentNode.removeChild(prog)
  cidr = obj['query']['usercontribs'];
  var res = document.getElementById('results-from-CIDR');
  res.appendChild(document.createElement('hr'));
  if(cidr.length == 0) {
    res.appendChild(document.createTextNode('No changes were found for this wildcard/CIDR range.'));
    res.appendChild(document.createElement('hr'));
    return;
  }
  res.appendChild(document.createTextNode(cidr.length + ' matches in the wildcard/CIDR range specified (chronologically): '));
  if(cidr.length == parseInt(prefixlimit)) {
    res.appendChild(document.createElement('br'));
    res.appendChild(document.createTextNode('Click '));
    var ns = (parseInt(frm.namespace[frm.namespace.selectedIndex].value) > -1) ? '&namespace=' + frm.namespace[frm.namespace.selectedIndex].value : '';
    var ts = (obj['query-continue']) ? obj['query-continue'].usercontribs.ucstart : cidr[cidr.length-1].timestamp;
    addlinkchild(res, wgScript + '?title=Special:Contributions&target=' + encodeURIComponent(frm.target.value) + ns + '&ucstart=' + ts, 'here');
    res.appendChild(document.createTextNode(' to see the next ' + prefixlimit + ' results.'));
  }
  res.appendChild(document.createElement('hr'));
  for(var i=0;i<cidr.length;i++) {
    res.appendChild(document.createTextNode('\u2022 ' + cidr[i].timestamp.replace(/T[\d:]*Z/,' ')));
    addlinkchild(res, wgScript + '?title=Special:Contributions/' + cidr[i].user, cidr[i].user);
    res.appendChild(document.createTextNode(' edited ('));
    addlinkchild(res, wgScript + '?title=-&curid=' + cidr[i].pageid + '&diff=' + cidr[i].revid , 'diff');
    res.appendChild(document.createTextNode(') '));
    addlinkchild(res, wgScript + '?title=-&curid=' + cidr[i].pageid, cidr[i].title);
    if(cidr[i].comment) res.appendChild(document.createTextNode(' (' + cidr[i].comment + ')'));
    res.appendChild(document.createElement('br'));
  }
}

function addlinkchild(obj,href,text,id,classes) {
  if(!obj || !href || !text) return false;
  var a = document.createElement('a');
  a.setAttribute('href',href);
  a.appendChild(document.createTextNode(text));
  if(id) a.setAttribute('id',id);
  if(classes) a.setAttribute('class',classes);
  obj.appendChild(a);
}

function queryString(p) {
  var re = RegExp('[&?]' + p + '=([^&]*)');
  var matches;
  if (matches = re.exec(document.location)) {
    try { 
      return decodeURI(matches[1]);
    } catch (e) {
    }
  }
  return null;
}