User:Anomie/lastmod.js

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This user script seems to have a documentation page at User:Anomie/lastmod and an accompanying .css page at User:Anomie/lastmod.css.

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/* If you want to use this script, simply add the following line to your monobook.js:
 
importScript('User:Anomie/lastmod.js'); // Linkback: [[User:Anomie/lastmod.js]]
 
* (Please keep the comment so I can see how many people use this).
*/

importStylesheet('User:Anomie/lastmod.css');

// Recognized values are "dmy" or "mdy"; anything else results in YYYY-MM-DD
// format output.
var LastModDateFormat="dmy";
var LastModUseUTC=false;
var LastModMonths=['January','February','March','April','May','June','July','August','September','October','November','December'];

addOnloadHook(function(){
    if(wgNamespaceNumber<0) return;
    var ins=document.getElementById('siteSub');
    if(!ins) return;

    var x = sajax_init_object();
    if(!x) return;
    x.open('POST', wgServer+wgScriptPath+'/api.php', true);
    x.setRequestHeader('Content-Type','application/x-www-form-urlencoded');
    x.onreadystatechange=function(){
        if(x.readyState!=4) return;
        var r;
        if(typeof(window.JSON)!='undefined'){
            r=JSON.parse(x.responseText);
        } else {
            r=x.responseText;
            r=!(/[^,:{}\[\]0-9.\-+Eaeflnr-u\n\r\t]/.test(r.replace(/"(\\.|[^\x22\\])*"/g,''))) && eval('('+r+')');
        }
        if(typeof(r.query.pages[wgArticleId].revisions[0].timestamp)=='undefined') return;
        m=r.query.pages[wgArticleId].revisions[0].timestamp.match(/^(\d\d\d\d)-(\d\d)-(\d\d)T(\d\d):(\d\d):(\d\d)Z$/);
        if(LastModUseUTC){
            m[2]-=1;
        } else {
            var dt=new Date(Date.UTC(m[1],m[2]-1,m[3],m[4],m[5],m[6]));
            m[1]=dt.getFullYear();
            m[2]=dt.getMonth();
            m[3]=dt.getDate();
            m[4]=dt.getHours().toString(); if(m[4].length==1) m[4]='0'+m[4];
            m[5]=dt.getMinutes().toString(); if(m[5].length==1) m[5]='0'+m[5];
            m[6]=dt.getSeconds().toString(); if(m[6].length==1) m[6]='0'+m[6];
        }

        var dt;
        if(LastModDateFormat=='dmy'){
            dt=m[3]+' '+LastModMonths[m[2]]+' '+m[1];
        } else if(LastModDateFormat=='dmy'){
            dt=LastModMonths[m[2]]+' '+m[3]+', '+m[1];
        } else {
            dt=m[1]+'-'+m[2]+'-'+m[3];
        } 
        dt+=' '+m[4]+':'+m[5];

        var x=document.createElement('SPAN');
        x.className='lastmodheader';
        x.appendChild(document.createTextNode('Last modified '+dt));
        ins.parentNode.insertBefore(x,ins);
    };
    x.send('action=query&format=json&titles='+encodeURIComponent(wgPageName)+'&prop=revisions&rvprop=timestamp');
});