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Tophness / Facebook Blocker

// ==UserScript==
// @name         Facebook Blocker
// @namespace    facebookblocker
// @version      0.1
// @author       Tophness
// @match        http://www.facebook.com/*
// @match        https://www.facebook.com/*
// @description  True Facebook user blocking (including groups)
// @require https://greasyfork.org/scripts/6217-gm-config/code/GM_config.js?version=23537
// @require http://ajax.googleapis.com/ajax/libs/jquery/1.6.2/jquery.min.js
// @grant   GM_getValue
// @grant   GM_setValue
// @grant   GM_log
// @grant   GM_registerMenuCommand
// @run-at       document-idle
// ==/UserScript==
var streamSelector = 'div[id^="stream_pagelet"]';
var storiesSelector = 'div[id^="topnews_main_stream"]';
var storySelector = 'div[id^="hyperfeed_story_id"]';
GM_config.init('Facebook Blocker Options', {
  'filters':
  {
    'label': 'Names to Block (Separate by commars)',
    'type': 'text',
    'default': ''
  }
});
function opengmcf() {
  GM_config.open();
}
GM_registerMenuCommand('Facebook Blocker Options', opengmcf);

var names = GM_config.get('filters');
if (names.length != 0) {
  names = names.split(',');
}
var mutationObserver = window.MutationObserver || window.WebKitMutationObserver || window.MozMutationObserver;

function remove(story) {
  if (!story) {
    return;
  }
  story.remove();
}

function block(story) {
  if (!story) {
    return;
  }
  if (story.getElementsByTagName('a').length) {
    var links = story.getElementsByTagName('a');
    for (var i = 0; i < links.length; i++) {
      var user = links[i].innerHTML;
        for (var i2 = 0; i2 < names.length; i2++) {
          if (user.indexOf(names[i2]) != - 1) {
            remove(story);
            break;
          }
        }
    }
  }
}
function process() {
  // Locate the stream every iteration to allow for FB SPA navigation which
  // replaces the stream element
  var stream = document.querySelector(streamSelector);
  if (!stream) {
    return;
  }
  var stories = stream.querySelectorAll(storiesSelector);
  if (!stories.length) {
    return;
  }
  for (var i = 0; i < stories.length; i++) {
    var story = stories[i].querySelectorAll(storySelector);
    if (!story.length) {
      return;
    }
    for (var i2 = 0; i2 < story.length; i2++) {
      block(story[i2]);
    }
  }
}
var observer = new mutationObserver(process);
observer.observe(document.querySelector('body'), {
  'childList': true,
  'subtree': true
});