User:Opencooper/lastEdit.js

 // This script reimplements the last edit banner used on mobile

 // License: CC0

 functionrequestRevision(){
 // If we're not reading an article, do nothing
 if(!(mw.config.get("wgAction")==="view"
 &&mw.config.get("wgIsArticle")
 &&!mw.config.get("wgIsMainPage"))){
 return;
 }

 // API docs: https://www.mediawiki.org/wiki/API:Revisions
 varapiUrl=location.origin+"/w/api.php";
 $.ajax({
 url:apiUrl,
 data:{
 action:"query",
 prop:"revisions",
 format:"json",
 titles:mw.config.get("wgPageName"),
 rvprop:"timestamp|user|comment|tags|ids"
 },
 success:parseEdit
 });
 }

 functionparseEdit(response){
 varpageId=mw.config.get("wgArticleId");
 try{
 varpageInfo=response.query.pages[pageId].revisions[0];
 }catch(e){
 return;
 }
 varrelativeTimestamp=calculateRelativeTimestamp(pageInfo.timestamp);

 vareditComment=pageInfo.comment;
 if(!editComment){
 editComment="[No edit summary]";
 }
 editComment=editComment.replace(/'/g,"'");// HTML encode quotes

 varlastEdit="<a href='/wiki/Special:Diff/"+pageInfo.revid
 +"' title='"+editComment+"'> Last edited "
 +relativeTimestamp+" ago</a>";
 varlastEditor="<a href='/wiki/Special:Contributions/"+pageInfo.user
 +"'>"+pageInfo.user+"</a>";
 // Can be filtered if needed
 varpageTags="";
 if(pageInfo.tags.length>0){
 pageTags="<span class='mw-tag-markers'> ("+pageInfo.tags
 +")</span>";
 }

 varnoticeText=lastEdit+" by "+lastEditor+pageTags;
 varnotice="<div id='lastEdit' style='float: right;'>"+noticeText
 +"</div>"

 displayEdit(notice);
 }

 // Adapted from https://github.com/wikimedia/mediawiki-extensions-MobileFrontend/blob/master/resources/mobile.modifiedBar/time.js
 functioncalculateRelativeTimestamp(timestamp){
 // Supposedly Date parsing is a bit wonky with respect to browsers and
 // timezones, but since we have an ISO-6801 date we can risk it
 vareditTimestamp=newDate(timestamp).getTime()/1000;
 varcurrentTimestamp=Math.round(newDate().getTime()/1000);
 vartimestampDelta=currentTimestamp-editTimestamp;

 varunits=['second','minute','hour','day','month','year'],
 limits=[1,60,3600,86400,2592000,31536000];

 vari=0;
 while(i<limits.length&&timestampDelta>limits[i+1]){
 ++i;
 }
 vardelta=Math.round(timestampDelta/limits[i]);
 vardeltaUnit=units[i];
 // Pluralize units
 if(delta>1){
 deltaUnit+="s";
 }

 returndelta+" "+deltaUnit;
 }

 // Display the last edit info to the right of the site subhead
 functiondisplayEdit(notice){
 // [[MediaWiki:Gadget-metadata.js]] replaces the siteSub element so wait
 // for it to run first
 // Check if script is enabled and if it hasn't ran already
 if($("script").text().search("ext.gadget.metadata")!=-1
 &&!$(".assess-article-rating").length
 &&mw.config.get("wgNamespaceNumber")==0){
 vartarget=document.querySelector("#siteSub");
 varobserver=newMutationObserver(function(mutations){// IE 11+
 $("#siteSub").append(notice);
 observer.disconnect();
 });

 observer.observe(target,{childList:true});
 }else{
 $("#siteSub").append(notice);
 }

 // Unfortunately [[Template:Coords]] absolutely positions itself so we
 // have to move it down so we don't get obscured
 varsheet=window.document.styleSheets[0];
 sheet.insertRule('#coordinates { top: 2em !important; }',
 sheet.cssRules.length);
 }

 if(mw.config.get('skin')!="minerva"){
 $(requestRevision);
 }