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Reddit highlight newest comments

Highlights new comments in a thread since your last visit

目前為 2014-06-29 提交的版本，檢視 最新版本。

  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\.)?reddit\.com\/r\/[a-zA-Z]+\/comments\/.*/
  7. // @version        1.5.3
  8. // ==/UserScript==
  9.  
  10. /*-----settings-----*/
  11. highlightBGColorB = '7CB9F7'; //background color of a highlighted newest comment
  12. highlightBGColorA = 'CEE3F7'; //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 #425466'; //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. 1.5.3
  27. -fixed a bog which has caused the script to hkald when the comment was too young to display score
  28. 1.5.2
  29. -some more fugs resulting from reddit changes
  30. 1.5.1
  31. -fixed reddit changes
  32. 1.4.2
  33. -tweaked some colors and timing
  34. 1.4.1
  35. -added highlighting comment with negative karma
  36. -added color shading dependent on the new comment age
  37. -added an option to manually edit the time of the last thread visit
  38. 1.3.1
  39. -Added expiration for localstorage, defaulted to 14 days. It won't grow indefinately now.
  40. -Reduced the amount of console.log clutter
  41. */
  42.  
  43. haveGold = false; //inicialization
  44.  
  45. function isNumber(n) {
  46.   return !isNaN(parseFloat(n)) && isFinite(n);
  47. }
  48.  
  49.  
  50. function hasClass(element, cls) {
  51.     return (' ' + element.className + ' ').indexOf(' ' + cls + ' ') > -1;
  52. }
  53.  
  54. function getThread() {
  55.     console.log("Logging reddit comment highlight.");
  56.     console.log("Fetching thread ID...");
  57.     if (document.querySelector('[rel="shorturl"]') === null) {
  58.         console.log("Not a comment thread. Aborting userscript...");
  59.         return;
  60.     }
  61. 	haveGold = hasClass(document.getElementsByTagName("body")[0], "gold");
  62. 	console.log("hasgold: " + haveGold);
  63. 	purgeOldStorage(expiration);
  64.     var threadID = "redd_id_" + document.querySelector('[rel="shorturl"]').href.substr(-6);
  65.     console.log("Thread id: " + threadID);
  66.     var lastVisit = localStorage.getItem(threadID);
  67.     if (lastVisit === null) {
  68.         console.log("Thread has not been visited yet. Creating localStorage...");
  69.         localStorage.setItem(threadID, Date.parse(Date()));
  70.     }
  71. 	else {
  72. 		var postMenu;
  73. 		postMenu = document.getElementById("siteTable").getElementsByClassName("flat-list")[0];
  74. 		if (!haveGold) {
  75. 			var timeDiff = Date.parse(Date()) - lastVisit;
  76. 			var goldBox = document.createElement("div");
  77. 				goldBox.className = "rounded gold-accent comment-visits-box";
  78. 			var goldBoxTitle = document.createElement("div");
  79. 				goldBoxTitle.className = "title";
  80. 			var goldBoxLabel = document.createElement("span");
  81. 				goldBoxLabel.innerHTML = "Highlight comments posted since previous visit [hh:mm] ago:";
  82. 			var goldBoxInput = document.createElement("input");
  83. 				goldBoxInput.type = "text";
  84. 				goldBoxInput.style.margin = "auto 5px";
  85. 				goldBoxInput.style.width = "64px";
  86. 				goldBoxInput.id = "timeInput"
  87. 				goldBoxInput.value = padToTwo(Math.floor(timeDiff/(1000*3600))) + ":" + padToTwo(Math.floor(60*(timeDiff/(1000*3600) - Math.floor(timeDiff/(1000*3600)))));
  88. 			var goldBoxOK = document.createElement("input");
  89. 				goldBoxOK.type = "button";
  90. 				goldBoxOK.value = "OK";
  91. 				goldBoxOK.addEventListener("click", function(){timeSetBack(threadID, goldBoxInput);}, false)
  92. 				goldBox.appendChild(goldBoxTitle);
  93. 				goldBoxTitle.appendChild(goldBoxLabel);
  94. 				goldBoxTitle.appendChild(goldBoxInput);
  95. 				goldBoxTitle.appendChild(goldBoxOK);
  96. 			insertNodeAfter(goldBox, document.getElementsByClassName("commentarea")[0].getElementsByClassName("usertext")[0]);
  97. 		}
  98. 	}
  99. 	commentReg = /^https?:\/\/(www\.)reddit\.com\/r\/[a-zA-Z]+\/comments\/[0-9a-z]+\/[0-9a-z_]+\/$/;
  100. 	isCommentPage = commentReg.test(document.URL);
  101.     highlightComments(lastVisit, isCommentPage);
  102. 	console.log("Match for full comment page(" + document.URL + "): " + isCommentPage);
  103. 	if (isCommentPage == true) {
  104. 		console.log("Setting localStorage to now...");
  105. 		localStorage.setItem(threadID, Date.parse(Date()));
  106. 	} else
  107. 	{
  108. 		console.log("not a comment page")
  109. 	}
  110. }
  111.  
  112. function padToTwo(number) {
  113.   if (number<=99) { number = ("0"+number).slice(-2); }
  114.   return number;
  115. }
  116.  
  117.  
  118. function timeSetBack(threadID, textbox){
  119. 	console.log("setting time back");
  120. 	var timeBackArray = textbox.value.split(":")
  121. 	if (timeBackArray.length > 2) {
  122. 		alert("You have not entered a valid time");
  123. 		console.log("too many colons");
  124. 		return
  125. 	}
  126. 	var timeBack = parseInt(timeBackArray[0], 10) + (parseInt(timeBackArray[1], 10)/60)
  127. 	if (timeBack != null && isNumber(timeBack) == true) {
  128. 		var lastVisit = Date.parse(Date())-timeBack*3600000;
  129. 		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.");
  130. 		localStorage.setItem(threadID, lastVisit);
  131. 		console.log("Setting localStorage " + threadID + " " + timeBack*3600000 + " ms back");
  132. 		highlightComments(lastVisit, true);
  133. 	}
  134. }
  135.  
  136. function purgeOldStorage(difference) {
  137. 	var thisTime = Date.parse(Date());
  138. 	var total=0;
  139.     for (var i=0;i<localStorage.length;i++) {
  140. 	    if (localStorage.key(i).substr(0,8)=="redd_id_" && parseInt(localStorage.getItem(localStorage.key(i)))+difference<thisTime) {
  141. 		    localStorage.removeItem(localStorage.key(i));
  142. 			total++;
  143. 			i=0;
  144. 		}
  145. 	}
  146. 	console.log(total + " localStorage older than " + difference + "ms has been removed");
  147. }
  148.  
  149. function isProperThread() {
  150. 	return true;
  151. }
  152.  
  153. function insertNodeAfter(node, sibling) {
  154. 	sibling.parentNode.insertBefore(node, sibling.nextSibling);
  155. }
  156.  
  157. function highlightComments(lastVisit, isCommentPage) {
  158.     console.log("Thread last visited in: " + lastVisit);
  159.     comments = document.getElementsByClassName('comment');
  160.     console.log("Comment count: " + comments.length);
  161. 	nowtime = Date.parse(Date());
  162. 	highlightHalf = Math.pow(0.5, (1/(-highlightHalf)));
  163.     for(i=0; i<comments.length; i++) {
  164. 		if ((' ' + comments[i].className + ' ').indexOf(' deleted ') > -1) {continue;} //if the comment contains class 'deleted', skip this iteration
  165.         var ctime = Date.parse(comments[i].childNodes[2].childNodes[0].getElementsByTagName('time')[0].getAttribute('title'));
  166. 		var scoreTag = comments[i].getElementsByClassName("collapsed")[0].getElementsByClassName("unvoted");
  167. 		if (scoreTag.length > 0) {
  168. 		    scorechild = parseInt(scoreTag[0].innerHTML);
  169. 		} else {
  170. 		    scorechild = 0;
  171. 		}
  172. 		var scoreTag = comments[i].parentNode.parentNode.parentNode.getElementsByClassName("collapsed")[0].getElementsByClassName("unvoted");
  173. 		if (scoreTag.length > 0) {
  174. 		    scoreparent = parseInt(scoreTag[0].innerHTML);
  175. 		} else {
  176. 		    scoreparent = 0;
  177. 		}
  178. 		var voted = comments[i].getElementsByClassName("midcol")[0].className;
  179. 		if (voted == "midcol likes") {
  180. 			scorechild++;
  181. 		} else if (voted == "midcol dislikes") {
  182. 			scorechild--;
  183. 		}
  184. 		var voted = comments[i].parentNode.parentNode.parentNode.getElementsByClassName("midcol")[0].className
  185. 		if (voted == "midcol likes") {
  186. 			scoreparent++;
  187. 		} else if (voted == "midcol dislikes") {
  188. 			scoreparent--;
  189. 		}
  190.         if (parseInt(ctime) > parseInt(lastVisit) && haveGold == false) {
  191. 			usertextBody = comments[i].getElementsByClassName("usertext-body")[0];
  192. 			console.log("comment(" + i + "," + 0 + "): gradient(" + nowtime + "," + ctime + ") = " + getGradient(nowtime-ctime));
  193. 			usertextBody.style.backgroundColor = interpolateColor(highlightBGColorA, highlightBGColorB, getGradient(nowtime-ctime));
  194. 			usertextBody.style.sborder = highlightBGBorder;
  195.         }
  196. 		
  197. 		
  198.         if (scoreparent < scorechild && highlihhtBetterChild == true && comments[i].parentNode.parentNode.parentNode.className != "content") {
  199.             comments[i].style.setProperty('border-left',betterChildStyle + " #" + betterChildStyleGradientA, 'important');
  200.         }
  201. 		if (scorechild < 0 && highlightNegative == true) {
  202.             comments[i].style.setProperty('border-left','1px solid #' + betterChildStyleGradientC, 'important');
  203.         }
  204.     }
  205. 	if (haveGold == true && isCommentPage == true) {highlightNew();}
  206. 	var goldSelect = document.getElementById("comment-visits");
  207. 	if (goldSelect != null) goldSelect.addEventListener("change", function(){console.log("changed highlighting");highlightNew();;}, false);
  208. 	window.addEventListener("load", function(){console.log("window loaded, highlighting");highlightNew();;}, false)
  209. }
  210.  
  211. function highlightNew(){
  212. 	comments = document.getElementsByClassName("new-comment");
  213. 	console.log("gold " + comments.length + " new comments");
  214. 	nowtime = Date.parse(Date());
  215. 	highlightHalf = Math.pow(0.5, (1/(-highlightHalf)));
  216. 	for(i=0; i<comments.length; i++) {
  217. 		var titleDate;
  218. 		titleDate = comments[i].childNodes[2].childNodes[0].getElementsByTagName('time')[0].getAttribute('datetime')
  219. 		var ctime = Date.parse(titleDate);
  220. 		usertextBody = comments[i].getElementsByClassName("usertext-body")[0];
  221. 		console.log("comment(" + i + "," + 0 + "): gradient(" + nowtime + "," + ctime + ") = " + getGradient(nowtime-ctime));
  222. 		usertextBody.style.backgroundColor = interpolateColor(highlightBGColorA, highlightBGColorB, getGradient(nowtime-ctime));
  223. 		usertextBody.style.sborder = highlightBGBorder;
  224. 	}
  225. }
  226.  
  227. function finalBGColor(ctime) {
  228. 	nowtime = Date.parse(Date());
  229. 	
  230. }
  231.  
  232. function getGradient(time) {
  233. 	return Math.pow(highlightHalf, -(time/3600000));
  234. }
  235.  
  236. function interpolateColor(minColor,maxColor,depth){
  237.     function d2h(d) {return d.toString(16);}
  238.     function h2d(h) {return parseInt(h,16);}
  239.     if(depth == 0){
  240.         return minColor;
  241.     }
  242.     if(depth == 1){
  243.         return maxColor;
  244.     }
  245.     var color = "#";
  246.         for(var i=0; i < 6; i+=2){
  247.         var minVal = new Number(h2d(minColor.substr(i,2)));
  248.         var maxVal = new Number(h2d(maxColor.substr(i,2)));
  249.         var nVal = minVal + (maxVal-minVal) * depth;
  250.         var val = d2h(Math.floor(nVal));
  251.         while(val.length < 2){
  252.             val = "0"+val;
  253.         }
  254.         color += val;
  255.     }
  256.     return color;
  257. }
  258.  
  259. function formatDate(unixtime) {
  260.     var t = new Date(unixtime);
  261.     //return t.toString();
  262.     return t.getDate() + "." + (t.getMonth()+1) + "." + t.getFullYear() + " " + (t.getUTCHours()+UTCDifference) + ":" + pad2(t.getMinutes()) + ":" + pad2(t.getSeconds()) + " " + timeZoneDesc;
  263. }
  264. function dateDifference(unixtime) {
  265.     var diff = new Date();
  266.     var unixtime2 = new Date(unixtime);
  267.     var secDiff = (diff.getSeconds() - unixtime2.getSeconds());
  268.     var minDiff = (diff.getMinutes() - unixtime2.getMinutes());
  269.     var hourDiff = (diff.getHours() - unixtime2.getHours());
  270.     var dayDiff = (diff.getDate() - unixtime2.getDate());
  271.     var monthDiff = (diff.getMonth() - unixtime2.getMonth());
  272.     var yearDiff = (diff.getFullYear() - unixtime2.getFullYear());
  273.     var months = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];
  274.     if (secDiff < 0) {
  275.         minDiff--;
  276.         secDiff += 60;
  277.     }
  278.     if (minDiff < 0) {
  279.         hourDiff--;
  280.         minDiff += 60;
  281.     }
  282.     if (hourDiff < 0) {
  283.         dayDiff--;
  284.         hourDiff += 24;
  285.     }
  286.     if (dayDiff < 0) {
  287.         monthDiff--;
  288.         dayDiff += months[diff.getMonth()-2]; // -2 as the months array is zero-indexed too
  289.     }
  290.     if (monthDiff < 0) {
  291.         yearDiff--;
  292.         monthDiff += 12;
  293.     }
  294.     //console.log(yearDiff+' years, '+monthDiff+' months, '+dayDiff+' days');
  295.     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");
  296.     //return yearDiff + " years " + monthDiff + " months " + dayDiff + " days " + hourDiff + " hours " + minDiff + " minutes " + secDiff + " seconds";
  297. }
  298. function addCss(cssCode) {
  299. //thanks for the function from this blog http://www.tomhoppe.com/index.php/2008/03/dynamically-adding-css-through-javascript/
  300.     var styleElement = document.createElement("style");
  301.     styleElement.type = "text/css";
  302.     if (styleElement.styleSheet) {
  303.         styleElement.styleSheet.cssText = cssCode;
  304.     } else {
  305.         styleElement.appendChild(document.createTextNode(cssCode));
  306.     }
  307.     document.getElementsByTagName("head")[0].appendChild(styleElement);
  308. }
  309. function pad2(number) {
  310.      return (number < 10 ? '0' : '') + number
  311. }
  312. getThread();