// ==UserScript==
// @name         Facebook unsponsored
// @namespace    http://tampermonkey.net/
// @version      1.4.1
// @description  Block Facebook news feed "sponsored" posts
// @author       solskido
// @match        https://www.facebook.com/*
// @run-at       document-idle
// ==/UserScript==

/* jshint esnext: true */

const streamSelector = 'div[id^="topnews_main_stream"]';
const storySelector = 'div[id^="hyperfeed_story_id"]';
const sponsoredSelector = 'uiStreamSponsoredLink';

const MutationObserver = window.MutationObserver || window.WebKitMutationObserver || window.MozMutationObserver;

let stream;
let stories = [];

let process = () => {
    // Locate the stream every iteration to allow for FB SPA navigation which
    // replaces the stream element
    stream = document.querySelector(streamSelector);
    if(!stream) {
        return;
    }

    stories = stream.querySelectorAll(storySelector);
    if(!stories.length) {
        return;
    }

    stories.forEach((story) => {
        const sponsored = story.getElementsByClassName(sponsoredSelector);
        if(sponsored.length) {
            story.remove();
        }
    });
};

const observer = new MutationObserver(process);
observer.observe(document.querySelector("body"), {
    'childList': true,
    'subtree': true
});