USER:SPLARKA TIMETRAVEL.JS

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Documentation for this user script can be added at User:Splarka/timetravel.

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/* Timetravel, version [0.1.0]

Originally from: http://en.wikipedia.org/wiki/User:Splarka/timetravel.js



Notes:

* Does not take into account:

** Old versions of templates, images

** Moved page titles

** Renamed users

** Time-sensitive magic words

*/



if(queryString('oldid') && !queryString('timetravel') && !queryString('diff') && wgAction == 'view') addOnloadHook(addTimetravelButton)

function addTimetravelButton() {

  var url = mw.config.get('wgServer') + mw.config.get('wgScriptPath') + '/api.php?maxage=300&smaxage=300&action=query&prop=revisions&rvprop=timestamp|ids&format=json&callback=addTimetravelButtonCB&revids=' + queryString('oldid');

  mw.loader.load(url);

}



function addTimetravelButtonCB(obj) {

  if(!obj'query' || !obj'query']['pages' || !obj'query']['pages'][wgArticleId]) return

  var rev = obj'query']['pages'][wgArticleId]['revisions'];

  if(rev.length == 0) return

  if(rev0]['revid' =! queryString('oldid')) return

  var ts = rev0]['timestamp'];

  mw.util.addPortletLink('p-cactions', mw.config.get('wgServer') + mw.config.get('wgScript') + '?title=' + encodeURIComponent(mw.config.get('wgPageName')) + '&oldid=' + queryString('oldid') + '&timetravel=' + ts, 'Time travel');

}



if(queryString('timetravel') && wgAction == 'view') addOnloadHook(engageTimetravelLinks)

function engageTimetravelLinks() {

  appendCSS('a.timetravel { color:#00ff00 !important;} a.ttused {color:#ff0000 !important;} b.timetravel {color:#008800;background-color:#ffff00;border:1px dashed #008800}');

  var note = document.getElementById('contentSub') || document.getElementById('topbar')

  if(note) { 

    var txt = document.createTextNode('Currently time travelling, appropriate time travel links in green.');

    var b = document.createElement('b');

    b.className = 'timetravel';

    b.appendChild(txt);

    note.appendChild(b);

  }

  var docobj = document.body;

  var a = docobj.getElementsByTagName('a');

  for(var i=0;i<a.length;i++) {

    // Exclude: catlinks, extiw/external/new/image, diff/oldid/action, special, http/uri, media?, anchors?, imagemap?

    if(ai].className.search(/(extiw|external|new|image)/ig) != -1) continue

    if(ai].href.search(/(\/wiki\/(Category\:|Special\:)|diff\=|oldid\=|action\=|Special\:Cite)/ig) != -1) continue



    var link = ai].href;

    link = link.replace(mw.config.get('wgServer') + mw.config.get('wgArticlePath').replace(/\$1/,''),'');

    if(link.indexOf('#') != -1) link = link.substr(0,link.indexOf('#'));

    if(link.search(/(http|https|file|javascript)\:/ig) == 0) continue



    ai].href = 'javascript:(timetravel("' + queryString('timetravel') + '","' + encodeURIComponent(link) + '",' + i + '))';

    ai].className += ' timetravel';

    ai].id = 'ttlink-' + i;

  }

}



function timetravel(date,page,id) {

  var a = document.getElementById('ttlink-' + id);

  a.className += ' ttused';

  a.href = 'javascript:void(0);';

  var url = mw.config.get('wgServer') + mw.config.get('wgScriptPath') + '/api.php?maxage=300&smaxage=300&action=query&prop=revisions&indexpageids&rvprop=ids&rvlimit=1&rvstart=' + date + '&format=json&callback=timetravelCB&titles=' + page;

  mw.loader.load(url);

}



function timetravelCB(obj) {

  if(!obj'query' || !obj'query']['pages' || !obj'query']['pageids']) return

  var pages = obj'query']['pages'];

  var ids = obj'query']['pageids'];

  if(ids.length == 0) return

  var title = '';

  var rev = pagesids0]]['revisions'];

  title = pagesids0]]['title'];



  if(!rev) {

    //change to redlink later, lazy now

    alert('No such page, or no revisions found that old.\n');

    return;

  }

  if(rev.length == 0) return

  var id = rev0]['revid'];

  if(id != 0) {

    var url = mw.config.get('wgServer') + mw.config.get('wgScript') + '?title=' + encodeURIComponent(title) + '&oldid=' + id + '&timetravel=' + queryString('timetravel') ;

    window.location.href = url;

  }

}



function queryString(p) {

  var re = RegExp('[&?#]' + p + '=([^&#]*)');

  var matches;

  if (matches = re.exec(document.location)) {

    try { 

      return decodeURI(matches1]);

    } catch (e) {

    }

  }

  return null;

}

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