Filter Reddit posts based on the user, subreddit, domain, or post flair name.
// ==UserScript==
// @name Reddit User/Subreddit/Domain Filter
// @namespace RedditUserSubDomainFilter
// @version 1.0.3
// @license GNU AGPLv3
// @description Filter Reddit posts based on the user, subreddit, domain, or post flair name.
// @author jcunews
// @include https://*.reddit.com/*
// @grant none
// ==/UserScript==
var filterFlair = JSON.parse(localStorage.filterFlair || "[]"),
filterUser = JSON.parse(localStorage.filterUser || "[]"),
filterSub = JSON.parse(localStorage.filterSub || "[]"),
filterDomain = JSON.parse(localStorage.filterDomain || "[]"),
posts, flair, user, sub, domain, buttonTemplate, button, match, filtered;
function doFilter(dontHide) {
posts = Array.prototype.slice.call(document.querySelectorAll(".thing"));
posts.forEach(function(post,i) {
filtered = false;
flair = post.querySelector(".linkflairlabel");
if (flair) {
match = filterFlair.indexOf(flair.title) >= 0;
filtered = filtered || !!match;
button = flair.nextSibling;
if (!button || !button.getAttribute || !button.getAttribute("type")) {
button = buttonTemplate.cloneNode(true);
button.title = "Filter posts with this flair (CTRL+Click to undo)";
button.style.marginLeft = "";
button.setAttribute("type", "flair");
button.setAttribute("value", flair.title);
button.onclick = setFilter;
flair.parentNode.insertBefore(button, flair.nextSibling);
}
button.style.background = match ? "#b0b" : "#c00";
}
user = post.querySelector(".author");
if (user) {
match = filterUser.indexOf(user.textContent) >= 0;
filtered = filtered || !!match;
button = user.nextSibling;
if (!button || !button.getAttribute || !button.getAttribute("type")) {
button = buttonTemplate.cloneNode(true);
button.title = "Filter posts from this user (CTRL+Click to undo)";
button.style.marginLeft = "";
button.setAttribute("type", "user");
button.setAttribute("value", user.textContent);
button.onclick = setFilter;
user.parentNode.insertBefore(button, user.nextSibling);
}
button.style.background = match ? "#b0b" : "#c00";
}
sub = post.querySelector(".subreddit");
if (sub) {
match = filterSub.indexOf(sub.textContent.match(/\/?(.*)/)[1]) >= 0;
filtered = filtered || !!match;
button = sub.nextSibling;
if (!button || !button.getAttribute || !button.getAttribute("type")) {
button = buttonTemplate.cloneNode(true);
button.title = "Filter posts from this subreddit (CTRL+Click to undo)";
button.setAttribute("type", "sub");
button.setAttribute("value", sub.textContent.match(/\/?(.*)/)[1]);
button.onclick = setFilter;
sub.parentNode.insertBefore(button, sub.nextSibling);
}
button.style.background = match ? "#b0b" : "#c00";
}
domain = post.querySelector(".domain");
if (domain) {
match = filterDomain.indexOf(domain.textContent.match(/\((.*)\)/)[1]) >= 0;
filtered = filtered || !!match;
button = domain.nextSibling;
if (!button || !button.getAttribute || !button.getAttribute("type")) {
button = buttonTemplate.cloneNode(true);
button.title = "Filter posts from this domain (CTRL+Click to undo)";
button.setAttribute("type", "domain");
button.setAttribute("value", domain.textContent.match(/\((.*)\)/)[1]);
button.onclick = setFilter;
domain.parentNode.insertBefore(button, domain.nextSibling);
}
button.style.background = match ? "#b0b" : "#c00";
}
if (filtered) {
if (!dontHide) {
post.setAttribute("filtered", "1");
post.style.display = "none";
}
} else {
post.removeAttribute("filtered");
post.style.display = "";
}
});
}
function setFilter(ev) {
var value, i;
button = ev.target;
value = button.getAttribute("value");
if (!ev.ctrlKey) {
//add filter
switch (button.getAttribute("type")) {
case "flair":
if (filterFlair.indexOf(value) < 0) {
filterFlair.push(value);
localStorage.filterFlair = JSON.stringify(filterFlair);
}
break;
case "user":
if (filterUser.indexOf(value) < 0) {
filterUser.push(value);
localStorage.filterUser = JSON.stringify(filterUser);
}
break;
case "sub":
if (filterSub.indexOf(value) < 0) {
filterSub.push(value);
localStorage.filterSub = JSON.stringify(filterSub);
}
break;
default: //domain
if (filterDomain.indexOf(value) < 0) {
filterDomain.push(value);
localStorage.filterDomain = JSON.stringify(filterDomain);
}
}
} else {
//remove filter
switch (button.getAttribute("type")) {
case "flair":
i = filterFlair.indexOf(value);
if (i >= 0) {
filterFlair.splice(i, 1);
localStorage.filterFlair = JSON.stringify(filterFlair);
}
break;
case "user":
i = filterUser.indexOf(value);
if (i >= 0) {
filterUser.splice(i, 1);
localStorage.filterUser = JSON.stringify(filterUser);
}
break;
case "sub":
i = filterSub.indexOf(value);
if (i >= 0) {
filterSub.splice(i, 1);
localStorage.filterSub = JSON.stringify(filterSub);
}
break;
default: //domain
i = filterDomain.indexOf(value);
if (i >= 0) {
filterDomain.splice(i, 1);
localStorage.filterDomain = JSON.stringify(filterDomain);
}
}
}
doFilter(ev.ctrlKey);
}
function showFiltered() {
posts = Array.prototype.slice.call(document.querySelectorAll(".thing[filtered]"));
posts.forEach(function(post) {
post.style.display = "";
});
}
function addLink(ele) {
ele.appendChild(button);
//monitor dynamic post list
if (window.siteTable_organic) {
(new MutationObserver(function(records) {
var newNodes = 0;
records.forEach(function(record) {
if (record.addedNodes) newNodes += record.addedNodes.length;
});
if (newNodes) doFilter();
})).observe(window.siteTable_organic, { childList: true });
}
}
if (!document.querySelector(".siteTable")) {
//create button template
buttonTemplate = document.createElement("DIV");
buttonTemplate.textContent = "X";
buttonTemplate.style.cssText = "\
display:inline-block; margin-left:1ex; border-radius:4px; padding:0 .7ex; \
background:#c00; text-align:center; line-height:normal; font-size: x-small; \
font-weight:bold; color:#fff; cursor:pointer";
//filter posts
doFilter();
//add link to show all filtered posts
button = document.createElement("A");
button.textContent = "Show Filtered";
button.title = "Temporarily show filtered posts";
button.style.marginLeft = "2ex";
button.href = "javascript:void(0)";
button.onclick = showFiltered;
if (match = document.querySelector(".tabmenu")) { //old layout
addLink(match);
} else if (match = document.querySelector(".gXMvOl")) { //new layout
setTimeout(addLink, 50, match);
}
}