☰

Thread reply button for Lithium communities

Add a "Thread Reply" button to forum post pages on many Lithium-based forums. This button initiates a reply to the original post instead of the linked post, even if you are not at the first page.

  1. // ==UserScript==
  2. // @name           Thread reply button for Lithium communities
  3. // @namespace      http://sites.google.com/site/cerisesorbet/
  4. // @description    Add a "Thread Reply" button to forum post pages on many Lithium-based forums. This button initiates a reply to the original post instead of the linked post, even if you are not at the first page. 
  5. // @include        http://lithosphere.lithium.com/*
  6. // @include        http://bookclubs.barnesandnoble.com/*
  7. // @include        http://forums.verizon.com/*
  8. // @include        http://boards.adultswim.com/*
  9. // @include        http://community.secondlife.com/*
  10. // @include        https://community.secondlife.com/*
  11. // @version        20150312
  12. // @license        MIT License
  13. // @copyright      (c) 2012-2015 Cerise Sorbet
  14. // @grant          none
  15. // ==/UserScript==
  16.  
  17. // return global thread ID, or 0 if missing
  18. function GetReplyThreadNumber() {
  19.   var links = document.getElementsByTagName('link');
  20.   if (links.length) {
  21.     var x; for (x = 0; x < links.length; x++) {
  22.       if (links[x].rel == 'canonical') {
  23.         var pathChop = links[x].href.split('/');
  24.         var tdpIndex = pathChop.indexOf('td-p');
  25.         if (~tdpIndex)
  26.           return Number(pathChop[tdpIndex + 1]);
  27.       }
  28.     }
  29.   }
  30.   return 0;
  31. }
  32.  
  33. function MakeThreadReplyButton() {
  34.   // Is there an active reply button? If not, give up.
  35.   var replySpan = document.getElementsByClassName('primary-action message-reply');
  36.   if (replySpan.length) {
  37.     var replyLink = replySpan[0].getElementsByTagName('a');
  38.     if (replyLink.length == 0)
  39.       return;
  40.   }
  41.   else
  42.       return;
  43.  
  44.   var replyThreadNumber = GetReplyThreadNumber();
  45.   if (replyThreadNumber) {
  46.     // create the new button
  47.     var threadReplyButton = document.createElement('span');
  48.     threadReplyButton.className = 'primary-action';
  49.     threadReplyButton.innerHTML = '<a class="lia-button lia-button-primary" style="margin-right: 10px" id="cerise-thread-reply-'
  50.       + replyThreadNumber + '" rel="nofollow:"><span>Thread Reply</span></button>';
  51.  
  52.     // squeeze in the new one
  53.     var bottomBar = document.getElementsByClassName("lia-menu-bar lia-menu-bar-bottom");
  54.     if (bottomBar.length) {
  55.       var buttonDiv = bottomBar[0].getElementsByClassName('lia-menu-bar-buttons');
  56.       if (buttonDiv.length) {
  57.         buttonDiv[0].style.display = ''; // div is there but typically hidden
  58.         buttonDiv[0].appendChild(threadReplyButton);
  59.  
  60.         // The button is installed, so add an event handler.
  61.         threadReplyButton.firstChild.addEventListener('click', DoThreadReply, true);
  62.       }
  63.     }
  64.   }
  65. }
  66.  
  67. function DoThreadReply() {
  68.   var threadNumber = this.id.replace(/^cerise-thread-reply-/, '');
  69.  
  70.   // Get the board_id to build a reply URL
  71.   var XMLReq = new XMLHttpRequest();
  72.   var XMLhref =  window.location.protocol + '//' + window.location.hostname
  73.     + '/restapi/vc/messages/id/' + threadNumber + '?xslt=json.xsl&amp;restapi.response_style=view';
  74.   XMLReq.open('GET', XMLhref, true);
  75.   XMLReq.onreadystatechange = function(e) {
  76.     if (XMLReq.readyState == 4) {
  77.       if(XMLReq.status != 200) { // HTTP error
  78.         alert('Unable to get reply link, HTTP error ' + XMLReq.status);
  79.       }
  80.       else {
  81.         try {
  82.           var article = JSON.parse(XMLReq.responseText);
  83.         }
  84.         catch(err) {
  85.           alert("Unable to get reply link, can't parse server response.");
  86.           return;
  87.         }
  88.  
  89.         if (!article.response.status) { // all responses should have this
  90.           alert('Unable to get reply link, missing REST response status');
  91.         }
  92.         else if (article.response.status != "success") { // internal Lithium error, like no permission or deleted message
  93.           errorText = article.response.error.code ? '[' + article.response.error.code  + '] ' : '[unknown] ';
  94.           if (article.response.error.message)
  95.             errorText += article.response.error.message;
  96.           alert("Can't get reply link, Lithium error:\n" + errorText);
  97.         }
  98.         else { // must be a success...
  99.           var message = article.response.message;
  100.           if (!message.board_id.$)
  101.             alert("Can't get message ID for thread reply");
  102.           else if (!message.board.href)
  103.             alert("Can't get board ID for thread reply");
  104.           else {
  105.             window.location.href = window.location.protocol + '//' + window.location.hostname
  106.               + '/t5/forums/replypage/board-id/'
  107.               + message.board.href.split('/').pop() + '/message-id/' +  message.board_id.$;
  108.           }
  109.         }
  110.       }
  111.     }
  112.   };
  113.  
  114.   XMLReq.send(null);
  115. }
  116.  
  117. MakeThreadReplyButton();