☰

Reddit highlight newest comments

Highlights new comments in a thread since your last visit

  1. // ==UserScript==
  2. // @name           Reddit highlight newest comments
  3. // @description    Highlights new comments in a thread since your last visit 
  4. // @namespace      https://greasyfork.org/users/98-jonnyrobbie
  5. // @author         JonnyRobbie
  6. // @include        /https?:\/\/((www|pay|[a-z]{2})\.)?reddit\.com\/r\/[a-zA-Z0-9_-]+\/comments\/.*/
  7. // @version        1.5.7
  8. // ==/UserScript==
  9.  
  10. /*-----settings-----*/
  11. highlightBGColorB = 'AECDFF'; //background color of a highlighted newest comment
  12. highlightBGColorA = 'E5EFFF'; //background color of a highlighted older comment
  13. highlightHalf = 2 //[hours]; when the algorithm should interpolate exactly 0.5 between A and B
  14. highlightBGBorder = '1px solid #CDDAF3'; //border style of a highlighted new comment
  15. expiration = 432000000; //expiraton time in millisesonds; default is 5 days (432000000ms)
  16. highlihhtBetterChild = true; //highlight child comment if it has better karma than its parent
  17. highlightNegative = true;
  18.     betterChildStyle = '3px solid'; //border of said comment
  19.     betterChildStyleGradientA = '99AAEE';
  20.     betterChildStyleGradientB = 'F55220';
  21. 	betterChildStyleGradientC = 'ad3429';
  22. /*-----settings-----*/
  23.  
  24. /*
  25. Changelog:
  26. 1.5.7
  27. -expand subreddit names
  28. 1.5.6
  29. -fix double UI when viewing thread as a mod
  30. 1.5.5
  31. -now works on subdomains
  32. -now works in subreddits with alphanumeric characters
  33. -some minor style changes
  34. 1.5.4
  35. -fixed not working
  36. 1.5.3
  37. -fixed a bog which has caused the script to hkald when the comment was too young to display score
  38. 1.5.2
  39. -some more fugs resulting from reddit changes
  40. 1.5.1
  41. -fixed reddit changes
  42. 1.4.2
  43. -tweaked some colors and timing
  44. 1.4.1
  45. -added highlighting comment with negative karma
  46. -added color shading dependent on the new comment age
  47. -added an option to manually edit the time of the last thread visit
  48. 1.3.1
  49. -Added expiration for localstorage, defaulted to 14 days. It won't grow indefinately now.
  50. -Reduced the amount of console.log clutter
  51. */
  52.  
  53. haveGold = false; //inicialization
  54.  
  55. function isNumber(n) {
  56.   return !isNaN(parseFloat(n)) && isFinite(n);
  57. }
  58.  
  59.  
  60. function hasClass(element, cls) {
  61.     return (' ' + element.className + ' ').indexOf(' ' + cls + ' ') > -1;
  62. }
  63.  
  64. function getThread() {
  65.     console.log("Logging reddit comment highlight.");
  66.     console.log("Fetching thread ID...");
  67.     if (document.querySelector('[rel="shorturl"]') === null) {
  68.         console.log("Not a comment thread. Aborting userscript...");
  69.         return;
  70.     }
  71. 	haveGold = hasClass(document.getElementsByTagName("body")[0], "gold") || hasClass(document.getElementsByTagName("body")[0], "moderatord");
  72. 	console.log("hasgold or is a mod: " + haveGold);
  73. 	purgeOldStorage(expiration);
  74.     var threadID = "redd_id_" + document.querySelector('[rel="shorturl"]').href.substr(-6);
  75.     console.log("Thread id: " + threadID);
  76.     var lastVisit = localStorage.getItem(threadID);
  77.     if (lastVisit === null) {
  78.         console.log("Thread has not been visited yet. Creating localStorage...");
  79.         localStorage.setItem(threadID, Date.parse(Date()));
  80.     }
  81. 	else {
  82. 		var postMenu;
  83. 		postMenu = document.getElementById("siteTable").getElementsByClassName("flat-list")[0];
  84. 		if (!haveGold) {
  85. 			var timeDiff = Date.parse(Date()) - lastVisit;
  86. 			var goldBox = document.createElement("div");
  87. 				goldBox.className = "rounded gold-accent comment-visits-box";
  88. 				goldBox.style.marginLeft = "10px";
  89. 			var goldBoxTitle = document.createElement("div");
  90. 				goldBoxTitle.className = "title";
  91. 			var goldBoxLabel = document.createElement("span");
  92. 				goldBoxLabel.innerHTML = "Highlight comments posted since previous visit [hh:mm] ago:";
  93. 			var goldBoxInput = document.createElement("input");
  94. 				goldBoxInput.type = "text";
  95. 				goldBoxInput.style.margin = "auto 5px";
  96. 				goldBoxInput.style.width = "64px";
  97. 				goldBoxInput.id = "timeInput"
  98. 				goldBoxInput.value = padToTwo(Math.floor(timeDiff/(1000*3600))) + ":" + padToTwo(Math.floor(60*(timeDiff/(1000*3600) - Math.floor(timeDiff/(1000*3600)))));
  99. 			var goldBoxOK = document.createElement("input");
  100. 				goldBoxOK.type = "button";
  101. 				goldBoxOK.value = "OK";
  102. 				goldBoxOK.addEventListener("click", function(){timeSetBack(threadID, goldBoxInput);}, false)
  103. 				goldBox.appendChild(goldBoxTitle);
  104. 				goldBoxTitle.appendChild(goldBoxLabel);
  105. 				goldBoxTitle.appendChild(goldBoxInput);
  106. 				goldBoxTitle.appendChild(goldBoxOK);
  107. 			insertNodeAfter(goldBox, document.getElementsByClassName("commentarea")[0].getElementsByClassName("usertext")[0]);
  108. 		}
  109. 	}
  110. 	commentReg = /^https?:\/\/(www\.)reddit\.com\/r\/[a-zA-Z0-9_-]+\/comments\/[0-9a-z]+\/[0-9a-z_]+\/$/;
  111. 	isCommentPage = commentReg.test(document.URL);
  112.     highlightComments(lastVisit, isCommentPage);
  113. 	console.log("Match for full comment page(" + document.URL + "): " + isCommentPage);
  114. 	if (isCommentPage == true) {
  115. 		console.log("Setting localStorage to now...");
  116. 		localStorage.setItem(threadID, Date.parse(Date()));
  117. 	} else
  118. 	{
  119. 		console.log("not a comment page")
  120. 	}
  121. 	permalinkReg = /^(https?:\/\/(www\.)reddit\.com\/r\/[a-zA-Z0-9_-]+\/comments\/[0-9a-z]+\/[0-9a-z_]+\/[0-9a-z]+)((\?context=([0-9])+)|\/)?$/;
  122. 	ispermalinkPage = permalinkReg.test(document.URL);
  123. 	if (ispermalinkPage == true) {
  124. 		var context = permalinkReg.exec(document.URL)[5];
  125. 		var nocontext = permalinkReg.exec(document.URL)[1];
  126. 		console.log("perma RegEx: " + nocontext)
  127. 		if (typeof context == 'undefined') {
  128. 			console.log("context not set");
  129. 			context = 0;
  130. 		}
  131. 		if (context > 5) {
  132. 			console.log("context greater than 5");
  133. 			context = 5;
  134. 		}
  135. 		console.log("permalink page...context " + context);
  136. 		addContext(context, permalinkReg.exec(document.URL)[1]);
  137. 	} else
  138. 	{
  139. 		console.log("not a permalink page");
  140. 	}
  141. }
  142.  
  143. function addContext(context, nocontext) {
  144. 	var newSelect = document.createElement("select");
  145. 	var infobar = document.getElementsByClassName("commentarea")[0].getElementsByClassName("infobar")[0];
  146. 	newSelect.addEventListener("change", function(){window.location=nocontext + '?context=' + this.selectedIndex;}, false);
  147. 	var newOption;
  148. 	for (var c=0; c<=5; c++) {
  149. 		var newOption = document.createElement("option");
  150. 		if (c == context) {
  151. 			newOption.selected = "selected";
  152. 		}
  153. 		newOption.value = nocontext + "?context=" + c;
  154. 		newOption.innerHTML = "Context: " + c;
  155. 		newSelect.appendChild(newOption);
  156. 	}
  157. 	infobar.appendChild(newSelect);
  158. }
  159.  
  160. function padToTwo(number) {
  161.   if (number<=99) { number = ("0"+number).slice(-2); }
  162.   return number;
  163. }
  164.  
  165.  
  166. function timeSetBack(threadID, textbox){
  167. 	console.log("setting time back");
  168. 	var timeBackArray = textbox.value.split(":")
  169. 	if (timeBackArray.length > 2) {
  170. 		alert("You have not entered a valid time");
  171. 		console.log("too many colons");
  172. 		return
  173. 	}
  174. 	var timeBack = parseInt(timeBackArray[0], 10) + (parseInt(timeBackArray[1], 10)/60)
  175. 	if (timeBack != null && isNumber(timeBack) == true) {
  176. 		var lastVisit = Date.parse(Date())-timeBack*3600000;
  177. 		if (lastVisit > localStorage.getItem(threadID)) alert("The time has been set lower than it was before. Please, refresh the page to properly display the changes.");
  178. 		localStorage.setItem(threadID, lastVisit);
  179. 		console.log("Setting localStorage " + threadID + " " + timeBack*3600000 + " ms back");
  180. 		highlightComments(lastVisit, true);
  181. 	}
  182. }
  183.  
  184. function purgeOldStorage(difference) {
  185. 	var thisTime = Date.parse(Date());
  186. 	var total=0;
  187.     for (var i=0;i<localStorage.length;i++) {
  188. 	    if (localStorage.key(i).substr(0,8)=="redd_id_" && parseInt(localStorage.getItem(localStorage.key(i)))+difference<thisTime) {
  189. 		    localStorage.removeItem(localStorage.key(i));
  190. 			total++;
  191. 			i=0;
  192. 		}
  193. 	}
  194. 	console.log(total + " localStorage older than " + difference + "ms has been removed");
  195. }
  196.  
  197. function isProperThread() {
  198. 	return true;
  199. }
  200.  
  201. function insertNodeAfter(node, sibling) {
  202. 	sibling.parentNode.insertBefore(node, sibling.nextSibling);
  203. }
  204.  
  205. function highlightComments(lastVisit, isCommentPage) {
  206.     console.log("Thread last visited in: " + lastVisit);
  207.     comments = document.getElementsByClassName('comment');
  208.     console.log("Comment count: " + comments.length);
  209. 	nowtime = Date.parse(Date());
  210. 	highlightHalf = Math.pow(0.5, (1/(-highlightHalf)));
  211.     for(i=0; i<comments.length; i++) {
  212. 		if ((' ' + comments[i].className + ' ').indexOf(' deleted ') > -1) {continue;} //if the comment contains class 'deleted', skip this iteration
  213.         var ctime = Date.parse(comments[i].childNodes[2].childNodes[0].getElementsByTagName('time')[0].getAttribute('title'));
  214. 		var scoreTag = comments[i].getElementsByClassName("tagline")[0].getElementsByClassName("unvoted");
  215. 		if (scoreTag.length > 0) {
  216. 		    scorechild = parseInt(scoreTag[0].innerHTML);
  217. 		} else {
  218. 		    scorechild = 0;
  219. 		}
  220. 		var scoreTag = comments[i].parentNode.parentNode.parentNode.getElementsByClassName("tagline")[0].getElementsByClassName("unvoted");
  221. 		if (scoreTag.length > 0) {
  222. 		    scoreparent = parseInt(scoreTag[0].innerHTML);
  223. 		} else {
  224. 		    scoreparent = 0;
  225. 		}
  226. 		var voted = comments[i].getElementsByClassName("midcol")[0].className;
  227. 		if (voted == "midcol likes") {
  228. 			scorechild++;
  229. 		} else if (voted == "midcol dislikes") {
  230. 			scorechild--;
  231. 		}
  232. 		var voted = comments[i].parentNode.parentNode.parentNode.getElementsByClassName("midcol")[0].className
  233. 		if (voted == "midcol likes") {
  234. 			scoreparent++;
  235. 		} else if (voted == "midcol dislikes") {
  236. 			scoreparent--;
  237. 		}
  238.         if (parseInt(ctime) > parseInt(lastVisit) && haveGold == false) {
  239. 			usertextBody = comments[i].getElementsByClassName("usertext-body")[0];
  240. 			console.log("comment(" + i + "," + 0 + "): gradient(" + nowtime + "," + ctime + ") = " + getGradient(nowtime-ctime));
  241. 			usertextBody.style.backgroundColor = interpolateColor(highlightBGColorA, highlightBGColorB, getGradient(nowtime-ctime));
  242. 			usertextBody.style.sborder = highlightBGBorder;
  243.         }
  244. 		
  245. 		
  246.         if (scoreparent < scorechild && highlihhtBetterChild == true && comments[i].parentNode.parentNode.parentNode.className != "content") {
  247.             comments[i].style.setProperty('border-left',betterChildStyle + " #" + betterChildStyleGradientA, 'important');
  248.         }
  249. 		if (scorechild < 0 && highlightNegative == true) {
  250.             comments[i].style.setProperty('border-left','1px solid #' + betterChildStyleGradientC, 'important');
  251.         }
  252.     }
  253. 	if (haveGold == true && isCommentPage == true) {highlightNew();}
  254. 	var goldSelect = document.getElementById("comment-visits");
  255. 	if (goldSelect != null) goldSelect.addEventListener("change", function(){console.log("changed highlighting");highlightNew();}, false);
  256. 	window.addEventListener("load", function(){console.log("window loaded, highlighting");highlightNew();}, false);
  257. }
  258.  
  259. function highlightNew(){
  260. 	comments = document.getElementsByClassName("new-comment");
  261. 	console.log("gold " + comments.length + " new comments");
  262. 	nowtime = Date.parse(Date());
  263. 	highlightHalf = Math.pow(0.5, (1/(-highlightHalf)));
  264. 	for(i=0; i<comments.length; i++) {
  265. 		var titleDate;
  266. 		titleDate = comments[i].childNodes[2].childNodes[0].getElementsByTagName('time')[0].getAttribute('datetime')
  267. 		var ctime = Date.parse(titleDate);
  268. 		usertextBody = comments[i].getElementsByClassName("usertext-body")[0];
  269. 		console.log("comment(" + i + "," + 0 + "): gradient(" + nowtime + "," + ctime + ") = " + getGradient(nowtime-ctime));
  270. 		usertextBody.style.backgroundColor = interpolateColor(highlightBGColorA, highlightBGColorB, getGradient(nowtime-ctime));
  271. 		usertextBody.style.sborder = highlightBGBorder;
  272. 	}
  273. }
  274.  
  275. function finalBGColor(ctime) {
  276. 	nowtime = Date.parse(Date());
  277. 	
  278. }
  279.  
  280. function getGradient(time) {
  281. 	return Math.pow(highlightHalf, -(time/3600000));
  282. }
  283.  
  284. function interpolateColor(minColor,maxColor,depth){
  285.     function d2h(d) {return d.toString(16);}
  286.     function h2d(h) {return parseInt(h,16);}
  287.     if(depth == 0){
  288.         return minColor;
  289.     }
  290.     if(depth == 1){
  291.         return maxColor;
  292.     }
  293.     var color = "#";
  294.         for(var i=0; i < 6; i+=2){
  295.         var minVal = new Number(h2d(minColor.substr(i,2)));
  296.         var maxVal = new Number(h2d(maxColor.substr(i,2)));
  297.         var nVal = minVal + (maxVal-minVal) * depth;
  298.         var val = d2h(Math.floor(nVal));
  299.         while(val.length < 2){
  300.             val = "0"+val;
  301.         }
  302.         color += val;
  303.     }
  304.     return color;
  305. }
  306.  
  307. function formatDate(unixtime) {
  308.     var t = new Date(unixtime);
  309.     //return t.toString();
  310.     return t.getDate() + "." + (t.getMonth()+1) + "." + t.getFullYear() + " " + (t.getUTCHours()+UTCDifference) + ":" + pad2(t.getMinutes()) + ":" + pad2(t.getSeconds()) + " " + timeZoneDesc;
  311. }
  312. function dateDifference(unixtime) {
  313.     var diff = new Date();
  314.     var unixtime2 = new Date(unixtime);
  315.     var secDiff = (diff.getSeconds() - unixtime2.getSeconds());
  316.     var minDiff = (diff.getMinutes() - unixtime2.getMinutes());
  317.     var hourDiff = (diff.getHours() - unixtime2.getHours());
  318.     var dayDiff = (diff.getDate() - unixtime2.getDate());
  319.     var monthDiff = (diff.getMonth() - unixtime2.getMonth());
  320.     var yearDiff = (diff.getFullYear() - unixtime2.getFullYear());
  321.     var months = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];
  322.     if (secDiff < 0) {
  323.         minDiff--;
  324.         secDiff += 60;
  325.     }
  326.     if (minDiff < 0) {
  327.         hourDiff--;
  328.         minDiff += 60;
  329.     }
  330.     if (hourDiff < 0) {
  331.         dayDiff--;
  332.         hourDiff += 24;
  333.     }
  334.     if (dayDiff < 0) {
  335.         monthDiff--;
  336.         dayDiff += months[diff.getMonth()-2]; // -2 as the months array is zero-indexed too
  337.     }
  338.     if (monthDiff < 0) {
  339.         yearDiff--;
  340.         monthDiff += 12;
  341.     }
  342.     //console.log(yearDiff+' years, '+monthDiff+' months, '+dayDiff+' days');
  343.     return (yearDiff == 0 ? "" : yearDiff + " years ") + (monthDiff == 0 ? "" : monthDiff + " months ") + (dayDiff == 0 ? "" : dayDiff + " days ") + (hourDiff == 0 ? "" : hourDiff + " hours ") + (minDiff == 0 ? "" : minDiff + " minutes ") + (secDiff == 0 ? "" : secDiff + " seconds");
  344.     //return yearDiff + " years " + monthDiff + " months " + dayDiff + " days " + hourDiff + " hours " + minDiff + " minutes " + secDiff + " seconds";
  345. }
  346. function addCss(cssCode) {
  347. //thanks for the function from this blog http://www.tomhoppe.com/index.php/2008/03/dynamically-adding-css-through-javascript/
  348.     var styleElement = document.createElement("style");
  349.     styleElement.type = "text/css";
  350.     if (styleElement.styleSheet) {
  351.         styleElement.styleSheet.cssText = cssCode;
  352.     } else {
  353.         styleElement.appendChild(document.createTextNode(cssCode));
  354.     }
  355.     document.getElementsByTagName("head")[0].appendChild(styleElement);
  356. }
  357. function pad2(number) {
  358.      return (number < 10 ? '0' : '') + number
  359. }
  360. getThread();