// ==UserScript==
// @name           Old Reddit Highlight Unread Comments
// @description    On topic pages, show "X unread comments (Y total)"; on comment pages, highlight unread comments. Local storage only -- does not work across multiple computers.
// @author         Xiao
// @namespace      https://greasyfork.org/users/5802
// @match          https://old.reddit.com/*
// @grant          GM_setValue
// @grant          GM_getValue
// @grant          GM_listValues
// @grant          GM_deleteValue
// @version        1.0
// ==/UserScript==
/*
todo
- navegar pelo new pra não ter que usar o teclado
- selecionar os minutos quando eu der espaço passando pelo ':'
Features:
* Replaces "10 comments" with "5 unread comments (10 total)"
* Unread comments are highlighted for ease of skimming
* You can navigate through unread comments with the following hotkeys:
Alt+Q / Alt+W -or- Ctrl+Up arrow / Ctrl+Down arrow
Mix code from:
https://greasyfork.org/scripts/8937-reddit-unread-comment-helper-fork/
https://greasyfork.org/scripts/8029-reddit-highlight-new-comments/
And a little piece of:
https://addons.mozilla.org/firefox/addon/cozy-reddit/
*/
(function(){
var DELETE_OLDER_THAN = 1000*60*60*24*30; // Items older than 30 days
/* Shove an item into local storage */
function getData(id) {
var data = GM_getValue(id);
if (data === undefined || data.substr(0, 1) != "{")
return null;
return JSON.parse(data);
}
/* Get an item out of local storage */
function setData(id, data) {
console.log('unread:');
console.log(data);
GM_setValue(id, JSON.stringify(data));
}
/* Delete old items out of local storage */
function deleteOldItems() {
var data = GM_getValue('_last_clean_time');
if (data !== null && Date.now() - data < 1000*60*60*24) { // Cleanup every 24 hours
return;
}
var row;
for (var key in GM_listValues()) {
data = GM_getValue(key);
if (data === undefined || data.substr(0, 1) != "{") {
continue;
}
row = JSON.parse(data);
if (Date.now() - row.t < DELETE_OLDER_THAN) {
continue;
}
GM_deleteValue(key);
}
GM_setValue('_last_clean_time', Date.now());
}
/* Cozy Reddit */
function calculateCommentTop (comment) {
var curTopPos = 0;
if (comment.offsetParent) {
do {
curTopPos += comment.offsetTop;
} while (comment = comment.offsetParent);
return [curTopPos - 10];
}
}
/* Get sorted array of unread comments offsets. */
function getCommentsOffsetTop() {
var comments = document.getElementsByClassName('unreadHighlighted');
var arr = new Array(comments.length);
for (var i = 0; i < comments.length; i++) {
arr[i] = calculateCommentTop(comments[i]);
}
arr.sort(function(a, b) {
return a - b;
});
return arr;
}
/* Jump to the next new comment. */
function jumpToNextComment() {
var unread = getCommentsOffsetTop();
var scrollUnread;
var scrollTop = window.pageYOffset || document.documentElement.scrollTop;
for (var i = 0; i < unread.length; i++) {
scrollUnread = unread[i];
if (scrollUnread > scrollTop) {
window.scrollTo(0, scrollUnread);
break;
}
}
}
/* Jump to the previous new comment. */
function jumpToPrevComment() {
var unread = getCommentsOffsetTop().reverse();
var scrollUnread;
var scrollTop = window.pageYOffset || document.documentElement.scrollTop;
for (var i = 0; i < unread.length; i++) {
scrollUnread = unread[i];
if (scrollUnread < scrollTop) {
window.scrollTo(0, scrollUnread);
break;
}
}
}
/*
Handle a list page, adding "n unread comments" links etc.
*/
function handleListPage() {
var snap = document.evaluate("//a" +
"[contains(concat(' ', normalize-space(@class), ' '), ' comments ')]" +
"[contains(@href, '/comments')]",
document, null, XPathR###lt.UNORDERED_NODE_SNAPSHOT_TYPE, null);
var b36tid, row, match, comments, seen, newcomments, newlink;
for(var elm = null, i = 0; (elm = snap.snapshotItem(i)); i++) {
match = elm.firstChild.nodeValue.match(/(\d+) (comment|comentário)/);
// No comments; bail early.
if (!match)
continue;
comments = match[1];
// Alphanumeric base-36 id, like "1lp5".
b36tid = elm.getAttribute("href").match(/\/comments\/([^\/]+)/)[1];
row = getData(b36tid);
seen = row ? row.c : 0;
newcomments = comments - seen;
// Can be negative if comments are deleted.
if (newcomments < 0) newcomments = 0;
newlink = elm.cloneNode(false);
var cstring = "unread comment" + (newcomments != 1 ? "s" : "");
if (newcomments > 0) {
nc = document.createElement('span');
nc.style.color = "#333";
nc.textContent = newcomments + " " + cstring;
elm.textContent = comments > newcomments ? ' (' + comments + ' total)' : '';
elm.insertBefore(nc, elm.childNodes[0]);
}
}
}
/*
Handle a comments page: highlight new comments, save the ID of the highest
comment, etc.
*/
function handleCommentsPage() {
var url = document.location.href.split("#");
var frag = url.length > 1 ? url[1] : false;
var b36tid = url[0].match(/\/comments\/([^\/]+)/)[1];
var row = getData(b36tid);
var partida, max_cid = 0, newmax = 0;
if (row) {
newmax = max_cid = row.m;
partida = row.t;
} else {
partida = Date.parse(document.getElementById('siteTable').getElementsByClassName('tagline')[0].getElementsByTagName('time')[document.getElementById('siteTable').getElementsByClassName('tagline')[0].getElementsByTagName('time').length - 1].getAttribute('datetime'));
}
var comments, i, split, b36cid, cid;
comments = document.getElementsByClassName('comment');
for(i=0; i<comments.length; i++) {
split = comments[i].className.split("_");
if(split.length == 2)
{
b36cid = split[1].split(' ')[0].substr(1);
cid = parseInt(b36cid, 36);
if (cid > max_cid) {
comments[i].getElementsByClassName("entry")[0].parentElement.classList.add('unreadHighlighted');
comments[i].getElementsByClassName("entry")[0].parentElement.setAttribute('style', HNC.generate_comment_style(Date.parse(comments[i].getElementsByClassName('tagline')[0].getElementsByTagName('time')[comments[i].getElementsByClassName('tagline')[0].getElementsByTagName('time').length - 1].getAttribute('datetime')), partida));
if (cid > newmax) {
newmax = cid;
}
}
}
}
if (getData(document.location.href.split("#")[0].match(/\/comments\/([^\/]+)/)[1]))
ui.create_comment_highlighter(getData(document.location.href.split("#")[0].match(/\/comments\/([^\/]+)/)[1]).t, 0);
else
ui.create_comment_highlighter(Date.parse(document.getElementById('siteTable').getElementsByClassName('tagline')[0].getElementsByTagName('time')[document.getElementById('siteTable').getElementsByClassName('tagline')[0].getElementsByTagName('time').length - 1].getAttribute('datetime')), 1);
if (row)
setTimeout(jumpToNextComment, 250);
comments = document.getElementsByClassName('comments')[0].innerHTML.match(/\b\d+\b/);
if (comments && comments[0] > 0) {
setData(b36tid, {"m": newmax, "c": comments, "t": Date.now()});
}
}
let HNC = {
highlight: function (since) {
let comments = document.getElementsByClassName('comment'),
username
;
if (document.body.classList.contains('loggedin')) {
username = document.getElementsByClassName('user')[0].firstElementChild.textContent;
}
for (let comment of comments) {
/* skip removed or deleted comments */
if (comment.classList.contains('deleted') || comment.classList.contains('spam')) {
continue;
}
/* skip our own comments */
let author = comment.getElementsByClassName('author')[0].textContent;
if (username && username == author) {
continue;
}
/* select original or edited comment time */
let times = comment.getElementsByClassName('tagline')[0].getElementsByTagName('time'),
time  = Date.parse(times[times.length - 1].getAttribute('datetime'))
;
/* add styles */
if (time > since) {
comment.getElementsByClassName("entry")[0].parentElement.classList.add('unreadHighlighted');
comment.getElementsByClassName("entry")[0].parentElement.setAttribute('style', this.generate_comment_style(time, since));
}
}
},
reset_highlighting: function () {
let comments = document.getElementsByClassName('unreadHighlighted');
for (let i = comments.length; i > 0; i--) {
let comment = comments[i - 1];
comment.classList.remove('unreadHighlighted');
comment.removeAttribute('style');
}
},
generate_comment_style: function (comment_time, since) {
let style = 'background-color: %color !important;\npadding: 0 5px;';
style = style.replace(/\s+/g, ' ');
style = style.replace(/%color/g, this.get_color(Date.now() - comment_time, Date.now() - since));
return style;
},
get_color: function (comment_age, highlighting_since) {
let time_diff = 1 - comment_age / highlighting_since,
color_newer = tinycolor('hsl(214, 16, 9').toHsl(), // hsl(210, 16.7%, 9.4%)
color_older = tinycolor('hsl(214, 16, 9').toHsl()
;
let color_final = tinycolor({
h: color_older.h + (color_newer.h - color_older.h) * time_diff,
s: color_older.s + (color_newer.s - color_older.s) * time_diff,
l: color_older.l + (color_newer.l - color_older.l) * time_diff,
});
return color_final.toHslString();
},
};
data = {
comment_highlighter: function () {/*
<div class="title" style="line-height: 20px;">Highlight comments since:
<select id="comment-visits">
<option value="">no highlighting</option>
<option value="custom">custom</option>
</select>
<input id="hnc_custom_visit" type="text" value="00:00" pattern="\d+?:\d+?" style="text-align: center; display: none;" />
</div>
*/},
get: function (name) {
return this.function_to_string(this[name]);
},
/* original authored by lavoiesl, at https://gist.github.com/lavoiesl/5880516*/
function_to_string: function (func, strip_leading_whitespace) {
if (strip_leading_whitespace === undefined) {
strip_leading_whitespace = 1;
}
let matches = func.toString().match(/function[\s\w]*?\(\)\s*?\{[\S\s]*?\/\*\!?\s*?\n([\s\S]+?)\s*?\*\/\s*\}/);
if (!matches) {
return false;
}
if (strip_leading_whitespace) {
matches[1] = matches[1].replace(/^(\t| {4})/gm, '');
}
return matches[1];
}
};
ui = {
create_comment_highlighter: function (visit, first) {
/* create element */
let highlighter = document.createElement('div');
highlighter.innerHTML = data.get('comment_highlighter');
highlighter.classList.add('rounded', 'gold-accent', 'comment-visits-box');
let commentarea      = document.getElementsByClassName('commentarea')[0],
sitetable        = commentarea.getElementsByClassName('sitetable')[0],
comment_margin   = window.getComputedStyle(sitetable.firstChild).getPropertyValue('margin-left'),
gold_highlighter = document.getElementsByClassName('comment-visits-box')[0]
;
/* remove default comment highlighter */
if (gold_highlighter) {
gold_highlighter.parentNode.removeChild(gold_highlighter);
}
/* properly place */
highlighter.style.setProperty('margin-left', comment_margin);
commentarea.insertBefore(highlighter, sitetable);
/* generate visits */
let select = document.getElementById('comment-visits');
select.style.textAlignLast = 'center';
let option = document.createElement('option');
option.textContent = (Math.floor(Math.floor((Date.now() - visit) / 1000) / 3600) < 10 ? '0' : '') + Math.floor(Math.floor((Date.now() - visit) / 1000) / 3600) + ':' + (Math.floor((Math.floor((Date.now() - visit) / 1000) % 3600) / 60) < 10 ? '0' : '') + Math.floor((Math.floor((Date.now() - visit) / 1000) % 3600) / 60);
option.value = visit;
select.appendChild(option);
select.children[2].setAttribute('selected', '');
if (!first) {
let visit0 = Date.parse(document.getElementById('siteTable').getElementsByClassName('tagline')[0].getElementsByTagName('time')[document.getElementById('siteTable').getElementsByClassName('tagline')[0].getElementsByTagName('time').length - 1].getAttribute('datetime'));
let option2 = document.createElement('option');
option2.textContent = (Math.floor(Math.floor((Date.now() - visit0) / 1000) / 3600) < 10 ? '0' : '') + Math.floor(Math.floor((Date.now() - visit0) / 1000) / 3600) + ':' + (Math.floor((Math.floor((Date.now() - visit0) / 1000) % 3600) / 60) < 10 ? '0' : '') + Math.floor((Math.floor((Date.now() - visit0) / 1000) % 3600) / 60);
option2.value = visit0;
document.getElementById('comment-visits').appendChild(option2);
}
// add listeners
select.addEventListener('change', this.update_highlighting);
let custom = document.getElementById('hnc_custom_visit');
custom.style.setProperty('width', (select.getBoundingClientRect().width) + 'px');
custom.addEventListener('keydown', this.custom_visit_key_monitor);
custom.addEventListener('blur', this.set_custom_visit);
this.custom_pos = 0;
},
update_highlighting: function (event) {
/* no highlighting */
if (event.target.value == '') {
HNC.reset_highlighting();
}
/* custom */
else if (event.target.value == 'custom') {
document.getElementById('comment-visits').style.setProperty('display', 'none');
let custom = document.getElementById('hnc_custom_visit');
custom.style.removeProperty('display');
custom.focus();
custom.setSelectionRange(0, 2);
}
/* previous visit */
else {
HNC.reset_highlighting();
HNC.highlight(parseInt(event.target.value, 10));
jumpToNextComment();
}
event.target.blur();
},
custom_visit_key_monitor: function (event) {
if (event.altKey || event.ctrlKey || (event.shiftKey && event.key != 'Tab')) {
return;
}
if (event.key == 'Tab') {
let match = event.target.value.match(/^(\d+?:)\d+?$/);
if (match) {
if (event.shiftKey) {
ui.custom_pos--;
}
else {
ui.custom_pos++;
}
if (ui.custom_pos % 2 == 0) {
event.target.setSelectionRange(0, match[1].length - 1);
}
else {
event.target.setSelectionRange(match[1].length, match[0].length);
}
event.preventDefault();
event.stopPropagation();
}
}
else if (event.key == 'Enter') {
event.target.blur();
event.preventDefault();
event.stopPropagation();
}
},
set_custom_visit: function (event) {
let select = document.getElementById('comment-visits'),
match  = event.target.value.match(/^(\d+?):(\d+?)$/)
;
if (match) {
let option  = document.createElement('option'),
hours   = parseInt(match[1], 10),
minutes = parseInt(match[2], 10),
visit   = Date.now() - (hours * 60 + minutes) * 60 * 1000
;
option.value = visit;
option.textContent = (hours < 10 ? '0' : '') + hours + ':' + (minutes < 10 ? '0' : '') + minutes;
select.add(option, 2);
select.selectedIndex = 2;
}
else {
select.selectedIndex = 0;
}
let change = new Event('change');
select.dispatchEvent(change);
event.target.value = '00:00';
event.target.style.setProperty('display', 'none');
select.style.removeProperty('display');
}
};
if (document.location.href.match(/\/comments(\/|\?|#|$)/)) {
if (document.location.href.match(/\/comments\/[^\/?#]+(\/([^\/?#]+\/?)?)?(\?|#|$)/)) {
deleteOldItems();
handleCommentsPage();
document.addEventListener('keydown', function(e) {
// Alt+Q
if (e.keyCode == "Q".charCodeAt(0) && !e.shiftKey && !e.ctrlKey && e.altKey && !e.metaKey) {
jumpToPrevComment();
e.preventDefault();
return false;
}
// Alt+W
if (e.keyCode == "W".charCodeAt(0) && !e.shiftKey && !e.ctrlKey && e.altKey && !e.metaKey) {
jumpToNextComment();
e.preventDefault();
return false;
}
// Ctrl+up
if (e.keyCode == 38 && !e.shiftKey && e.ctrlKey && !e.altKey && !e.metaKey) {
jumpToPrevComment();
e.preventDefault();
return false;
}
// Ctrl+down
if (e.keyCode == 40 && !e.shiftKey && e.ctrlKey && !e.altKey && !e.metaKey) {
jumpToNextComment();
e.preventDefault();
return false;
}
}, false);
}
} else {
handleListPage();
}
})();