User:Amalthea/culoghelper.js

//<nowiki>
/*
 * Small script to help navigate the CU log.
 * Turns timestamps of a filtered CU log like on [//en.wikipedia.org/wiki/Special:CheckUserLog?cuSearchType=target&cuSearch=Example]
 * into links that try to locate the entry in the full log.
 * This simplifies looking at the context of a previous check.
 */
jQuery(function($){
    if ( mw.config.get( 'wgPageName' ) == 'Special:CheckUserLog' )
 {
  mw.loader.using( ['mediawiki.util', 'mediawiki.user', 'moment'], function() {
   var paraCuloghighlight = mw.util.getParamValue('culogHighlight');
   var paraCusearch = mw.util.getParamValue('cuSearch');
   
   if (!paraCuloghighlight && !paraCusearch) return;
   
   //collect all date text nodes
   var dateNodes = $("#bodyContent > #mw-content-text > ul > li").map(function(i,n){return $(n).contents().first();})  
   
   //highlight all nodes with a matching date
   if (paraCuloghighlight)
   {
    dateNodes.each(function(i,n){
     if(n[0].textContent !== paraCuloghighlight) return;
     
     //highlight
     n.wrap("<span style='background-color:#FCC;'/>");
     
     //and scroll into view
     var windowtop = $(window).scrollTop();
     var windowbottom = windowtop + $(window).height();
     var ntop = n.parent().offset().top;
     var nbottom = ntop + n.parent().outerHeight(true);
     if (ntop < windowtop) $(window).scrollTop(ntop);
     else if (nbottom > windowbottom) $(window).scrollTop(nbottom + windowtop- windowbottom);
    });
   }
   
   //link all date nodes to the full log view
   if (paraCusearch)
   {
    var locale = mw.config.get("wgUserLanguage");

    // Date parsing in Javascript is aweful.
    // Localized, configurable date output on Mediawiki doesn't make this any easier.
    // It's conceivable to write a parser that could match /most/ variants out there ...
    // but I'll just strict parse the English date formats instead
    var parsingStrings = {
     "en": {
      "mdy": "HH:mm, MMMM D, YYYY",
      "dmy": "HH:mm, D MMMM YYYY",
      "ymd": "HH:mm, YYYY MMMM D",
      "ISO 8601": "YYYY-MM-DDTHH:mm:ss",
     },
    }
    var localeParsingStrings = parsingStrings[locale];
    if (localeParsingStrings)
     var parsingString = localeParsingStrings[mw.config.get("wgDefaultDateFormat")];
    if (parsingString)
     var parseDate = function(input){return moment(input, parsingString + ", ", true);}
    else
     var parseDate = moment;

    //Note: We append ", " above since the messages building the log lines, e.g. MediaWiki:Checkuser-log-entry-userips,
    //      look like this: $3, $1 got IP addresses for $2
    //      That is, they do in English! Might need adapting for other languages, or imprecise parsing, or some markup in the messages!



    //function lifted from popups.js
    function getTimeOffsetMinutes(tz)
    {
     if( tz && typeof tz === 'string' )
     {
      if( tz.indexOf('|') > -1 ) // New format
       return parseInt(tz.split('|')[1],10);
      else if ( tz.indexOf(':') > -1 ) // Old format
       return( parseInt(tz,10)*60 + parseInt(tz.split(':')[1],10) );
     }
     return 0;
    }
 
    var timeOffsetMinutes = getTimeOffsetMinutes(mw.user.options.get("timecorrection"));

    //calculate one hour into the future; this will be the upper limit of the log displayed
    timeOffsetMinutes -= 60;

    dateNodes.wrap(function(){
     
     var dateText = $(this)[0].textContent;
     var timestamp = parseDate(dateText);
     if (!timestamp.isValid()) return;
     timestamp.subtract(timeOffsetMinutes, 'minutes');
     var dateOffsetString = timestamp.format("YYYYMMDDHHmm");
     return "<a href='"+mw.config.get("wgScript")+"?title=Special:CheckUserLog&offset="+mw.util.rawurlencode(dateOffsetString)+"&culogHighlight="+mw.util.rawurlencode(dateText)+"' />";
    });
   }
  });
 }
});
//</nowiki>