User:Evad37/Watchlist-openUnread.js

 /* Add any or all of these lines after the importScript line to set various options (the default values are shown):

 	var openUnread_maxnum = "10"; // Preset value for max number of pages
 	var openUnread_oldest = false; // Preset state of checkbox "oldest first". Set to true for checked, or false for unchecked
 	var openUnread_showAbove = false; // If set to true the "Open unread pages" button appears above the above the "Watchlist options" box, instead of below it

 */
 mw.loader.using(['mediawiki.util','mediawiki.api'],function(){
 $(document).ready(function(){
 if(mw.config.get('wgCanonicalSpecialPageName')!='Watchlist'){
 // only operate in Special: namespace, on Special:Watchlist
 return;
 }

 // Set default options for any that haven't been set
 if(window.openUnread_maxnum===undefined){window.openUnread_maxnum="10";}
 if(window.openUnread_oldest===undefined){window.openUnread_oldest=true;}
 if(window.openUnread_showAbove===undefined){window.openUnread_showAbove=false;}

 //Add a form to open multiple unread pages
 varopenUnread_form='<div id="openUnread-input">'+
 '<button id="openUnread-go">Open unread pages</button> '+
 '(Options: <input type="text" name="openUnread-number" id="openUnread-number" style="width:2em;" value='+openUnread_maxnum+' /> pages max / '+
 '<span class="mw-input-with-label"><input name="openUnread-order" id="openUnread-order" type="checkbox">&nbsp;<label for="openUnread-order">oldest first</label></span>'+
 ')</div>';
 if(openUnread_showAbove){
 $("form#mw-watchlist-form").before(openUnread_form);
 $("#openUnread-input").css("margin-top","5px");
 $("fieldset#mw-watchlist-options").css("margin-top","0");
 }else{
 $("form#mw-watchlist-form").after(openUnread_form+'<hr>');
 $("#openUnread-input").css("margin","5px 0");
 $("fieldset#mw-watchlist-options").css("margin-bottom","0");
 }

 if(openUnread_oldest){
 $("#openUnread-order").prop("checked","true");
 }

 //Seen is reused for each button click to account for itmes which have already been opened
 varseen={};
 varcount=0;// var increment on each button click iteration


 // Start processing on button click
 $("#openUnread-go").click(function(){
 // get max number from input
 varmaxnum=parseInt($('#openUnread-number').val());
 if(isNaN(maxnum)||maxnum<1){
 msg="\Error: \""+$('#openUnread-number').val()+"\" is zero, negative, or not a number";
 mw.notify(msg,{autoHide:false,tag:"WatchlistOpenUnread",title:"Watchlist-openUnread says:"});
 return;// error - zero, negative, or not a number
 }

 count++;

 // get unread title links as array
 varunread=$("li.mw-changeslist-line-watched, table.mw-changeslist-line-watched")
 .find("a.mw-changeslist-title")
 .map(function(){
 return$(this).text();
 })
 .get();

 // reverse order if oldest first option selected
 if($('#openUnread-order').prop('checked')){
 unread.reverse();
 }

 //remove duplicates
 varunique_unread=[];
 varlen=unread.length;
 varj=0;
 for(vari=0;i<len;i++){
 varitem=unread[i];
 if(!(seen[item]>=count)){// because (undefined < number) is false
 seen[item]=count;
 unique_unread[j++]=item;
 }
 }

 // reduce to the max number to open
 if(unique_unread.length>maxnum){
 unique_unread=unique_unread.slice(0,maxnum);
 }

 // Mark each unique unread item as already seen for the next iterations
 for(varu=0;u<len;u++){
 seen[unique_unread[u]]=seen[unique_unread[u]]+1000;
 }

 // Callback for api errors
 apiFailedCallback=function(code,result){
 varmsg="";
 if(code==="http"){
 msg="HTTP error: "+result.textStatus;// api_result contains the jqXHR object
 }elseif(code==="ok-but-empty"){
 msg="Error: Got an empty response from the server</i></span>";
 }else{
 msg="API error: "+code;
 }
 mw.notify(msg,{autoHide:false,tag:"WatchlistOpenUnread",title:"Watchlist-openUnread says:"});
 };

 // Callback for getRevId: get old revision id for diff link
 apiCallback_getRevId=function(result){
 varpage_id=result.query.pageids[0];
 vardiff_oldid=result.query.pages[page_id].revisions&&result.query.pages[page_id].revisions[1]&&result.query.pages[page_id].revisions[1].revid;
 vardiff_title=mw.util.wikiUrlencode(result.query.pages[page_id].title);

 if(!diff_oldid){
 window.open("https:"+mw.config.get('wgServer')+mw.config.get('wgScriptPath')+
 "/index.php?title="+diff_title,"_blank");
 console.log("Could not find old revision for page "+result.query.pages[page_id].title);
 return;
 }

 window.open("https:"+mw.config.get('wgServer')+mw.config.get('wgScriptPath')+
 "/index.php?title="+diff_title+"&diff=cur&oldid="+diff_oldid,"_blank");
 };

 // Function to get revision id of a page as of a particular timestamp
 getRevId=function(pageid,timestamp){
 newmw.Api().get({
 action:'query',
 pageids:pageid,
 prop:'revisions',
 rvprop:'ids',
 rvstart:timestamp,
 rvlimit:'2',
 indexpageids:1,
 rawcontinue:''
 }).done(apiCallback_getRevId)
 .fail(apiFailedCallback);
 };

 // Callback for getTimestamps: get timestamps/pageids to pass through to getRevId function
 apiCallback_getTimestamps=function(result){
 varpage_ids=result.query.pageids;
 for(vark=0;k<page_ids.length;k++){
 varnts=result.query.pages[page_ids[k]].notificationtimestamp;
 getRevId(page_ids[k],nts);
 }
 };

 // Function to get timestamps from the api
 getTimestamps=function(pagetitles){
 newmw.Api().get({
 action:'query',
 titles:pagetitles,
 prop:'info',
 inprop:'notificationtimestamp',
 indexpageids:1,
 rawcontinue:''
 }).done(apiCallback_getTimestamps)
 .fail(apiFailedCallback);
 };

 // Split into lists of 50 (max number for api)
 for(varii=0;ii<unique_unread.length;ii+=50){
 getTimestamps(unique_unread.slice(ii,ii+49).join("|"));
 }

 // show pages as read on watchlist
 $("li.mw-changeslist-line-watched, table.mw-changeslist-line-watched")
 .find("a.mw-changeslist-title")
 .filter(":contains('"+unique_unread.join("'), :contains('")+"')")
 .closest(".mw-changeslist-line-watched")
 .removeClass("mw-changeslist-line-watched")
 .addClass("mw-changeslist-line-not-watched");

 });

 });
 });