Highlights new comments in a thread since your last visit
// ==UserScript==
// @name Reddit highlight newest comments
// @description Highlights new comments in a thread since your last visit
// @namespace https://greasyfork.org/users/98-jonnyrobbie
// @author JonnyRobbie
// @include /https?:\/\/((www|pay|[a-z]{2})\.)?reddit\.com\/r\/[a-zA-Z0-9_-]+\/comments\/.*/
// @version 1.5.7
// ==/UserScript==
/*-----settings-----*/
highlightBGColorB = 'AECDFF'; //background color of a highlighted newest comment
highlightBGColorA = 'E5EFFF'; //background color of a highlighted older comment
highlightHalf = 2 //[hours]; when the algorithm should interpolate exactly 0.5 between A and B
highlightBGBorder = '1px solid #CDDAF3'; //border style of a highlighted new comment
expiration = 432000000; //expiraton time in millisesonds; default is 5 days (432000000ms)
highlihhtBetterChild = true; //highlight child comment if it has better karma than its parent
highlightNegative = true;
betterChildStyle = '3px solid'; //border of said comment
betterChildStyleGradientA = '99AAEE';
betterChildStyleGradientB = 'F55220';
betterChildStyleGradientC = 'ad3429';
/*-----settings-----*/
/*
Changelog:
1.5.7
-expand subreddit names
1.5.6
-fix double UI when viewing thread as a mod
1.5.5
-now works on subdomains
-now works in subreddits with alphanumeric characters
-some minor style changes
1.5.4
-fixed not working
1.5.3
-fixed a bog which has caused the script to hkald when the comment was too young to display score
1.5.2
-some more fugs resulting from reddit changes
1.5.1
-fixed reddit changes
1.4.2
-tweaked some colors and timing
1.4.1
-added highlighting comment with negative karma
-added color shading dependent on the new comment age
-added an option to manually edit the time of the last thread visit
1.3.1
-Added expiration for localstorage, defaulted to 14 days. It won't grow indefinately now.
-Reduced the amount of console.log clutter
*/
haveGold = false; //inicialization
function isNumber(n) {
return !isNaN(parseFloat(n)) && isFinite(n);
}
function hasClass(element, cls) {
return (' ' + element.className + ' ').indexOf(' ' + cls + ' ') > -1;
}
function getThread() {
console.log("Logging reddit comment highlight.");
console.log("Fetching thread ID...");
if (document.querySelector('[rel="shorturl"]') === null) {
console.log("Not a comment thread. Aborting userscript...");
return;
}
haveGold = hasClass(document.getElementsByTagName("body")[0], "gold") || hasClass(document.getElementsByTagName("body")[0], "moderatord");
console.log("hasgold or is a mod: " + haveGold);
purgeOldStorage(expiration);
var threadID = "redd_id_" + document.querySelector('[rel="shorturl"]').href.substr(-6);
console.log("Thread id: " + threadID);
var lastVisit = localStorage.getItem(threadID);
if (lastVisit === null) {
console.log("Thread has not been visited yet. Creating localStorage...");
localStorage.setItem(threadID, Date.parse(Date()));
}
else {
var postMenu;
postMenu = document.getElementById("siteTable").getElementsByClassName("flat-list")[0];
if (!haveGold) {
var timeDiff = Date.parse(Date()) - lastVisit;
var goldBox = document.createElement("div");
goldBox.className = "rounded gold-accent comment-visits-box";
goldBox.style.marginLeft = "10px";
var goldBoxTitle = document.createElement("div");
goldBoxTitle.className = "title";
var goldBoxLabel = document.createElement("span");
goldBoxLabel.innerHTML = "Highlight comments posted since previous visit [hh:mm] ago:";
var goldBoxInput = document.createElement("input");
goldBoxInput.type = "text";
goldBoxInput.style.margin = "auto 5px";
goldBoxInput.style.width = "64px";
goldBoxInput.id = "timeInput"
goldBoxInput.value = padToTwo(Math.floor(timeDiff/(1000*3600))) + ":" + padToTwo(Math.floor(60*(timeDiff/(1000*3600) - Math.floor(timeDiff/(1000*3600)))));
var goldBoxOK = document.createElement("input");
goldBoxOK.type = "button";
goldBoxOK.value = "OK";
goldBoxOK.addEventListener("click", function(){timeSetBack(threadID, goldBoxInput);}, false)
goldBox.appendChild(goldBoxTitle);
goldBoxTitle.appendChild(goldBoxLabel);
goldBoxTitle.appendChild(goldBoxInput);
goldBoxTitle.appendChild(goldBoxOK);
insertNodeAfter(goldBox, document.getElementsByClassName("commentarea")[0].getElementsByClassName("usertext")[0]);
}
}
commentReg = /^https?:\/\/(www\.)reddit\.com\/r\/[a-zA-Z0-9_-]+\/comments\/[0-9a-z]+\/[0-9a-z_]+\/$/;
isCommentPage = commentReg.test(document.URL);
highlightComments(lastVisit, isCommentPage);
console.log("Match for full comment page(" + document.URL + "): " + isCommentPage);
if (isCommentPage == true) {
console.log("Setting localStorage to now...");
localStorage.setItem(threadID, Date.parse(Date()));
} else
{
console.log("not a comment page")
}
permalinkReg = /^(https?:\/\/(www\.)reddit\.com\/r\/[a-zA-Z0-9_-]+\/comments\/[0-9a-z]+\/[0-9a-z_]+\/[0-9a-z]+)((\?context=([0-9])+)|\/)?$/;
ispermalinkPage = permalinkReg.test(document.URL);
if (ispermalinkPage == true) {
var context = permalinkReg.exec(document.URL)[5];
var nocontext = permalinkReg.exec(document.URL)[1];
console.log("perma RegEx: " + nocontext)
if (typeof context == 'undefined') {
console.log("context not set");
context = 0;
}
if (context > 5) {
console.log("context greater than 5");
context = 5;
}
console.log("permalink page...context " + context);
addContext(context, permalinkReg.exec(document.URL)[1]);
} else
{
console.log("not a permalink page");
}
}
function addContext(context, nocontext) {
var newSelect = document.createElement("select");
var infobar = document.getElementsByClassName("commentarea")[0].getElementsByClassName("infobar")[0];
newSelect.addEventListener("change", function(){window.location=nocontext + '?context=' + this.selectedIndex;}, false);
var newOption;
for (var c=0; c<=5; c++) {
var newOption = document.createElement("option");
if (c == context) {
newOption.selected = "selected";
}
newOption.value = nocontext + "?context=" + c;
newOption.innerHTML = "Context: " + c;
newSelect.appendChild(newOption);
}
infobar.appendChild(newSelect);
}
function padToTwo(number) {
if (number<=99) { number = ("0"+number).slice(-2); }
return number;
}
function timeSetBack(threadID, textbox){
console.log("setting time back");
var timeBackArray = textbox.value.split(":")
if (timeBackArray.length > 2) {
alert("You have not entered a valid time");
console.log("too many colons");
return
}
var timeBack = parseInt(timeBackArray[0], 10) + (parseInt(timeBackArray[1], 10)/60)
if (timeBack != null && isNumber(timeBack) == true) {
var lastVisit = Date.parse(Date())-timeBack*3600000;
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.");
localStorage.setItem(threadID, lastVisit);
console.log("Setting localStorage " + threadID + " " + timeBack*3600000 + " ms back");
highlightComments(lastVisit, true);
}
}
function purgeOldStorage(difference) {
var thisTime = Date.parse(Date());
var total=0;
for (var i=0;i<localStorage.length;i++) {
if (localStorage.key(i).substr(0,8)=="redd_id_" && parseInt(localStorage.getItem(localStorage.key(i)))+difference<thisTime) {
localStorage.removeItem(localStorage.key(i));
total++;
i=0;
}
}
console.log(total + " localStorage older than " + difference + "ms has been removed");
}
function isProperThread() {
return true;
}
function insertNodeAfter(node, sibling) {
sibling.parentNode.insertBefore(node, sibling.nextSibling);
}
function highlightComments(lastVisit, isCommentPage) {
console.log("Thread last visited in: " + lastVisit);
comments = document.getElementsByClassName('comment');
console.log("Comment count: " + comments.length);
nowtime = Date.parse(Date());
highlightHalf = Math.pow(0.5, (1/(-highlightHalf)));
for(i=0; i<comments.length; i++) {
if ((' ' + comments[i].className + ' ').indexOf(' deleted ') > -1) {continue;} //if the comment contains class 'deleted', skip this iteration
var ctime = Date.parse(comments[i].childNodes[2].childNodes[0].getElementsByTagName('time')[0].getAttribute('title'));
var scoreTag = comments[i].getElementsByClassName("tagline")[0].getElementsByClassName("unvoted");
if (scoreTag.length > 0) {
scorechild = parseInt(scoreTag[0].innerHTML);
} else {
scorechild = 0;
}
var scoreTag = comments[i].parentNode.parentNode.parentNode.getElementsByClassName("tagline")[0].getElementsByClassName("unvoted");
if (scoreTag.length > 0) {
scoreparent = parseInt(scoreTag[0].innerHTML);
} else {
scoreparent = 0;
}
var voted = comments[i].getElementsByClassName("midcol")[0].className;
if (voted == "midcol likes") {
scorechild++;
} else if (voted == "midcol dislikes") {
scorechild--;
}
var voted = comments[i].parentNode.parentNode.parentNode.getElementsByClassName("midcol")[0].className
if (voted == "midcol likes") {
scoreparent++;
} else if (voted == "midcol dislikes") {
scoreparent--;
}
if (parseInt(ctime) > parseInt(lastVisit) && haveGold == false) {
usertextBody = comments[i].getElementsByClassName("usertext-body")[0];
console.log("comment(" + i + "," + 0 + "): gradient(" + nowtime + "," + ctime + ") = " + getGradient(nowtime-ctime));
usertextBody.style.backgroundColor = interpolateColor(highlightBGColorA, highlightBGColorB, getGradient(nowtime-ctime));
usertextBody.style.sborder = highlightBGBorder;
}
if (scoreparent < scorechild && highlihhtBetterChild == true && comments[i].parentNode.parentNode.parentNode.className != "content") {
comments[i].style.setProperty('border-left',betterChildStyle + " #" + betterChildStyleGradientA, 'important');
}
if (scorechild < 0 && highlightNegative == true) {
comments[i].style.setProperty('border-left','1px solid #' + betterChildStyleGradientC, 'important');
}
}
if (haveGold == true && isCommentPage == true) {highlightNew();}
var goldSelect = document.getElementById("comment-visits");
if (goldSelect != null) goldSelect.addEventListener("change", function(){console.log("changed highlighting");highlightNew();}, false);
window.addEventListener("load", function(){console.log("window loaded, highlighting");highlightNew();}, false);
}
function highlightNew(){
comments = document.getElementsByClassName("new-comment");
console.log("gold " + comments.length + " new comments");
nowtime = Date.parse(Date());
highlightHalf = Math.pow(0.5, (1/(-highlightHalf)));
for(i=0; i<comments.length; i++) {
var titleDate;
titleDate = comments[i].childNodes[2].childNodes[0].getElementsByTagName('time')[0].getAttribute('datetime')
var ctime = Date.parse(titleDate);
usertextBody = comments[i].getElementsByClassName("usertext-body")[0];
console.log("comment(" + i + "," + 0 + "): gradient(" + nowtime + "," + ctime + ") = " + getGradient(nowtime-ctime));
usertextBody.style.backgroundColor = interpolateColor(highlightBGColorA, highlightBGColorB, getGradient(nowtime-ctime));
usertextBody.style.sborder = highlightBGBorder;
}
}
function finalBGColor(ctime) {
nowtime = Date.parse(Date());
}
function getGradient(time) {
return Math.pow(highlightHalf, -(time/3600000));
}
function interpolateColor(minColor,maxColor,depth){
function d2h(d) {return d.toString(16);}
function h2d(h) {return parseInt(h,16);}
if(depth == 0){
return minColor;
}
if(depth == 1){
return maxColor;
}
var color = "#";
for(var i=0; i < 6; i+=2){
var minVal = new Number(h2d(minColor.substr(i,2)));
var maxVal = new Number(h2d(maxColor.substr(i,2)));
var nVal = minVal + (maxVal-minVal) * depth;
var val = d2h(Math.floor(nVal));
while(val.length < 2){
val = "0"+val;
}
color += val;
}
return color;
}
function formatDate(unixtime) {
var t = new Date(unixtime);
//return t.toString();
return t.getDate() + "." + (t.getMonth()+1) + "." + t.getFullYear() + " " + (t.getUTCHours()+UTCDifference) + ":" + pad2(t.getMinutes()) + ":" + pad2(t.getSeconds()) + " " + timeZoneDesc;
}
function dateDifference(unixtime) {
var diff = new Date();
var unixtime2 = new Date(unixtime);
var secDiff = (diff.getSeconds() - unixtime2.getSeconds());
var minDiff = (diff.getMinutes() - unixtime2.getMinutes());
var hourDiff = (diff.getHours() - unixtime2.getHours());
var dayDiff = (diff.getDate() - unixtime2.getDate());
var monthDiff = (diff.getMonth() - unixtime2.getMonth());
var yearDiff = (diff.getFullYear() - unixtime2.getFullYear());
var months = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];
if (secDiff < 0) {
minDiff--;
secDiff += 60;
}
if (minDiff < 0) {
hourDiff--;
minDiff += 60;
}
if (hourDiff < 0) {
dayDiff--;
hourDiff += 24;
}
if (dayDiff < 0) {
monthDiff--;
dayDiff += months[diff.getMonth()-2]; // -2 as the months array is zero-indexed too
}
if (monthDiff < 0) {
yearDiff--;
monthDiff += 12;
}
//console.log(yearDiff+' years, '+monthDiff+' months, '+dayDiff+' days');
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");
//return yearDiff + " years " + monthDiff + " months " + dayDiff + " days " + hourDiff + " hours " + minDiff + " minutes " + secDiff + " seconds";
}
function addCss(cssCode) {
//thanks for the function from this blog http://www.tomhoppe.com/index.php/2008/03/dynamically-adding-css-through-javascript/
var styleElement = document.createElement("style");
styleElement.type = "text/css";
if (styleElement.styleSheet) {
styleElement.styleSheet.cssText = cssCode;
} else {
styleElement.appendChild(document.createTextNode(cssCode));
}
document.getElementsByTagName("head")[0].appendChild(styleElement);
}
function pad2(number) {
return (number < 10 ? '0' : '') + number
}
getThread();