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Reddit User/Subreddit/Domain Filter

Filter Reddit posts based on the user, subreddit, domain, or post flair name.

  1. // ==UserScript==
  2. // @name        Reddit User/Subreddit/Domain Filter
  3. // @namespace   RedditUserSubDomainFilter
  4. // @version     1.0.3
  5. // @license     GNU AGPLv3
  6. // @description Filter Reddit posts based on the user, subreddit, domain, or post flair name.
  7. // @author      jcunews
  8. // @include     https://*.reddit.com/*
  9. // @grant       none
  10. // ==/UserScript==
  11.  
  12. var filterFlair  = JSON.parse(localStorage.filterFlair || "[]"),
  13.     filterUser   = JSON.parse(localStorage.filterUser || "[]"),
  14.     filterSub    = JSON.parse(localStorage.filterSub || "[]"),
  15.     filterDomain = JSON.parse(localStorage.filterDomain || "[]"),
  16.     posts, flair, user, sub, domain, buttonTemplate, button, match, filtered;
  17.  
  18. function doFilter(dontHide) {
  19.   posts = Array.prototype.slice.call(document.querySelectorAll(".thing"));
  20.   posts.forEach(function(post,i) {
  21.     filtered = false;
  22.     flair = post.querySelector(".linkflairlabel");
  23.     if (flair) {
  24.       match = filterFlair.indexOf(flair.title) >= 0;
  25.       filtered = filtered || !!match;
  26.       button = flair.nextSibling;
  27.       if (!button || !button.getAttribute || !button.getAttribute("type")) {
  28.         button = buttonTemplate.cloneNode(true);
  29.         button.title = "Filter posts with this flair (CTRL+Click to undo)";
  30.         button.style.marginLeft = "";
  31.         button.setAttribute("type", "flair");
  32.         button.setAttribute("value", flair.title);
  33.         button.onclick = setFilter;
  34.         flair.parentNode.insertBefore(button, flair.nextSibling);
  35.       }
  36.       button.style.background = match ? "#b0b" : "#c00";
  37.     }
  38.     user = post.querySelector(".author");
  39.     if (user) {
  40.       match = filterUser.indexOf(user.textContent) >= 0;
  41.       filtered = filtered || !!match;
  42.       button = user.nextSibling;
  43.       if (!button || !button.getAttribute || !button.getAttribute("type")) {
  44.         button = buttonTemplate.cloneNode(true);
  45.         button.title = "Filter posts from this user (CTRL+Click to undo)";
  46.         button.style.marginLeft = "";
  47.         button.setAttribute("type", "user");
  48.         button.setAttribute("value", user.textContent);
  49.         button.onclick = setFilter;
  50.         user.parentNode.insertBefore(button, user.nextSibling);
  51.       }
  52.       button.style.background = match ? "#b0b" : "#c00";
  53.     }
  54.     sub = post.querySelector(".subreddit");
  55.     if (sub) {
  56.       match = filterSub.indexOf(sub.textContent.match(/\/?(.*)/)[1]) >= 0;
  57.       filtered = filtered || !!match;
  58.       button = sub.nextSibling;
  59.       if (!button || !button.getAttribute || !button.getAttribute("type")) {
  60.         button = buttonTemplate.cloneNode(true);
  61.         button.title = "Filter posts from this subreddit (CTRL+Click to undo)";
  62.         button.setAttribute("type", "sub");
  63.         button.setAttribute("value", sub.textContent.match(/\/?(.*)/)[1]);
  64.         button.onclick = setFilter;
  65.         sub.parentNode.insertBefore(button, sub.nextSibling);
  66.       }
  67.       button.style.background = match ? "#b0b" : "#c00";
  68.     }
  69.     domain = post.querySelector(".domain");
  70.     if (domain) {
  71.       match = filterDomain.indexOf(domain.textContent.match(/\((.*)\)/)[1]) >= 0;
  72.       filtered = filtered || !!match;
  73.       button = domain.nextSibling;
  74.       if (!button || !button.getAttribute || !button.getAttribute("type")) {
  75.         button = buttonTemplate.cloneNode(true);
  76.         button.title = "Filter posts from this domain (CTRL+Click to undo)";
  77.         button.setAttribute("type", "domain");
  78.         button.setAttribute("value", domain.textContent.match(/\((.*)\)/)[1]);
  79.         button.onclick = setFilter;
  80.         domain.parentNode.insertBefore(button, domain.nextSibling);
  81.       }
  82.       button.style.background = match ? "#b0b" : "#c00";
  83.     }
  84.     if (filtered) {
  85.       if (!dontHide) {
  86.         post.setAttribute("filtered", "1");
  87.         post.style.display = "none";
  88.       }
  89.     } else {
  90.       post.removeAttribute("filtered");
  91.       post.style.display = "";
  92.     }
  93.   });
  94. }
  95.  
  96. function setFilter(ev) {
  97.   var value, i;
  98.   button = ev.target;
  99.   value = button.getAttribute("value");
  100.   if (!ev.ctrlKey) {
  101.     //add filter
  102.     switch (button.getAttribute("type")) {
  103.       case "flair":
  104.         if (filterFlair.indexOf(value) < 0) {
  105.           filterFlair.push(value);
  106.           localStorage.filterFlair = JSON.stringify(filterFlair);
  107.         }
  108.         break;
  109.       case "user":
  110.         if (filterUser.indexOf(value) < 0) {
  111.           filterUser.push(value);
  112.           localStorage.filterUser = JSON.stringify(filterUser);
  113.         }
  114.         break;
  115.       case "sub":
  116.         if (filterSub.indexOf(value) < 0) {
  117.           filterSub.push(value);
  118.           localStorage.filterSub = JSON.stringify(filterSub);
  119.         }
  120.         break;
  121.       default: //domain
  122.         if (filterDomain.indexOf(value) < 0) {
  123.           filterDomain.push(value);
  124.           localStorage.filterDomain = JSON.stringify(filterDomain);
  125.         }
  126.     }
  127.   } else {
  128.     //remove filter
  129.     switch (button.getAttribute("type")) {
  130.       case "flair":
  131.         i = filterFlair.indexOf(value);
  132.         if (i >= 0) {
  133.           filterFlair.splice(i, 1);
  134.           localStorage.filterFlair = JSON.stringify(filterFlair);
  135.         }
  136.         break;
  137.       case "user":
  138.         i = filterUser.indexOf(value);
  139.         if (i >= 0) {
  140.           filterUser.splice(i, 1);
  141.           localStorage.filterUser = JSON.stringify(filterUser);
  142.         }
  143.         break;
  144.       case "sub":
  145.         i = filterSub.indexOf(value);
  146.         if (i >= 0) {
  147.           filterSub.splice(i, 1);
  148.           localStorage.filterSub = JSON.stringify(filterSub);
  149.         }
  150.         break;
  151.       default: //domain
  152.         i = filterDomain.indexOf(value);
  153.         if (i >= 0) {
  154.           filterDomain.splice(i, 1);
  155.           localStorage.filterDomain = JSON.stringify(filterDomain);
  156.         }
  157.     }
  158.   }
  159.   doFilter(ev.ctrlKey);
  160. }
  161.  
  162. function showFiltered() {
  163.   posts = Array.prototype.slice.call(document.querySelectorAll(".thing[filtered]"));
  164.   posts.forEach(function(post) {
  165.     post.style.display = "";
  166.   });
  167. }
  168.  
  169. function addLink(ele) {
  170.   ele.appendChild(button);
  171.   //monitor dynamic post list
  172.   if (window.siteTable_organic) {
  173.     (new MutationObserver(function(records) {
  174.       var newNodes = 0;
  175.       records.forEach(function(record) {
  176.         if (record.addedNodes) newNodes += record.addedNodes.length;
  177.       });
  178.       if (newNodes) doFilter();
  179.     })).observe(window.siteTable_organic, { childList: true });
  180.   }
  181. }
  182.  
  183. if (!document.querySelector(".siteTable")) {
  184.   //create button template
  185.   buttonTemplate = document.createElement("DIV");
  186.   buttonTemplate.textContent = "X";
  187.   buttonTemplate.style.cssText = "\
  188. display:inline-block; margin-left:1ex; border-radius:4px; padding:0 .7ex; \
  189. background:#c00; text-align:center; line-height:normal; font-size: x-small; \
  190. font-weight:bold; color:#fff; cursor:pointer";
  191.   //filter posts
  192.   doFilter();
  193.   //add link to show all filtered posts
  194.   button = document.createElement("A");
  195.   button.textContent = "Show Filtered";
  196.   button.title = "Temporarily show filtered posts";
  197.   button.style.marginLeft = "2ex";
  198.   button.href = "javascript:void(0)";
  199.   button.onclick = showFiltered;
  200.   if (match = document.querySelector(".tabmenu")) { //old layout
  201.     addLink(match);
  202.   } else if (match = document.querySelector(".gXMvOl")) { //new layout
  203.     setTimeout(addLink, 50, match);
  204.   }
  205. }

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