Add a link on Reddit tab bar to remove posts on front page or subreddit in N number of pages which are older than N hours or has more than N number of comments.
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// ==UserScript==
// @name Add Link To Remove Old/Crowded Reddit Posts
// @namespace AddLinkToRemoveOldCrowdedRedditPosts
// @description Add a link on Reddit tab bar to remove posts on front page or subreddit in N number of pages which are older than N hours or has more than N number of comments.
// @include https://www.reddit.com/*
// @version 1.1.1
// @author jcunews
// @grant none
// ==/UserScript==
//increase this wait time if subsequent page processing didn't work.
//for proper use, after the page has been loaded, the link won't show after before period.
//i.e. when network is slow
var networkWaitTime = 500; //time in milliseconds
setTimeout(function() {
if (!document.querySelector(".content > .spacer > .sitetable .hide-button")) return;
var ele = document.createElement("SCRIPT");
ele.innerHTML = "(" + (function() {
//*** settings start ***
var maxAge = 17; //in hours
var maxComments = 1000;
var maxNumPages = 2;
//*** settings end ***
//initialize variables
var config = JSON.parse(sessionStorage.removeOldCrowdedPosts || "{}"), index = -1;
var postsToHide, link, indicatorCurtain, indicatorMessagePanel;
config.pageCount = config.pageCount || 0;
//prepare posts removal indicator message
indicatorCurtain = document.createElement("DIV");
indicatorCurtain.style.cssText = "position: fixed; z-index: 99; left: 0; top: 0; right: 0; bottom: 0; opacity: 0.66; background: black";
indicatorMessagePanel = document.createElement("DIV");
indicatorMessagePanel.style.cssText = "position: fixed; z-index: 100; left: 30%; top: 40%; right: 30%; background: red; color: white; text-align: center; line-height: 3em; font-size: 20pt; font-weight: bold";
indicatorMessagePanel.textContent = "Hiding posts...";
//add the link if not already added
function addLink() {
var tabmenu = document.querySelector("#header-bottom-left .tabmenu");
if (!tabmenu || link) return;
link = document.createElement("A");
link.textContent = "Remove Old/Crowded";
link.style.marginLeft = "3ex"
link.href = "javascript:void(0)";
link.onclick = startRemovePosts;
tabmenu.appendChild(link);
}
//check whether to process next page or not
function checkForNextPage() {
config.pageCount--;
sessionStorage.removeOldCrowdedPosts = JSON.stringify(config);
if (config.pageCount) {
//there are more pages to process. click the next-page link
var link = document.querySelector(".sitetable .next-button a");
if (link) {
link.click();
}
} else {
//no more page to process. add the link
addLink();
document.body.removeChild(indicatorMessagePanel);
document.body.removeChild(indicatorCurtain);
}
}
//remove the posts
function removePosts() {
var posts = document.querySelectorAll(".content > .spacer > .sitetable > .thing");
var time = (new Date()).valueOf(), maxAgeMs = maxAge*3600000;
var i, postTime, comments, link;
//add matching posts in current page into hide-list
postsToHide = [];
for (i = posts.length-1; i >= 0; i--) {
//get post's time
postTime = parseInt(posts[i].getAttribute("data-timestamp"));
//get post's number of comments
comments = parseInt(posts[i].querySelector(".comments").textContent.match(/\d+/)[0]);
//main decision
if (((time-postTime) > maxAgeMs) || (comments > maxComments)) {
//add post's hide link into hide-list
link = posts[i].querySelector(".hide-button a");
if (link) {
postsToHide.push(link);
}
}
}
if (postsToHide.length) {
//has post(s) to hide. show posts removal indicator message
document.body.appendChild(indicatorCurtain);
document.body.appendChild(indicatorMessagePanel);
//hide the first post in the hide-list
postsToHide.splice(0, 1)[0].click();
} else {
//no post to hide. check for next page
checkForNextPage();
}
}
//start removing posts
function startRemovePosts() {
if (!navigator.onLine) {
alert("Web browser is offline.");
return;
}
config.pageCount = maxNumPages;
sessionStorage.removeOldCrowdedPosts = JSON.stringify(config);
removePosts();
}
//setup network-post callback
window._change_state = window.change_state;
window.change_state = function(e, t, n, i, s) {
var _s = s, link;
if ((t === "hide") && (n === window.hide_thing)) {
s = function() {
if (postsToHide.length) {
//has more post(s) to hide. hide the next one in the hide-list
postsToHide.splice(0, 1)[0].click();
} else {
//all hide network requests has completed. check for next page
checkForNextPage();
}
if (_s) {
return _s.apply(this, arguments);
}
};
}
return window._change_state(e, t, n, i, s);
};
//check whether posts removal is in effect
if (config.pageCount) {
//posts removal is in effect. process it
removePosts();
} else {
//posts removal is not in effect, or no more pages to process. add the link
addLink();
}
}).toString() + ")()";
document.head.appendChild(ele);
}, networkWaitTime);