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Reydan / Hide posts by Flairs [Reddit]

// ==UserScript==
// @name         Hide posts by Flairs [Reddit]
// @namespace    https://www.reddit.com/
// @version      1.5
// @description  Hide posts by Flairs [Reddit]
// @author       Reydan
// @match        https://www.reddit.com/*
// @grant        none
// @license      MIT
// @copyright    2019, Reydan (https://openuserjs.org/users/Reydan)
// ==/UserScript==

window.flag = false;
window.flairs = ["Парень","Мем"];
window.word_title = [];


window._waitForHide = function _waitForHide()
{
    const container = document.getElementById('2x-container');

    if (container !== undefined)
    {
        const divs = container.getElementsByTagName("div");
        for (let i = 0; i < divs.length; i++)
        {
            loop_for:
            if (
                (divs[i].id.indexOf('t3_') === 0) &&
                (divs[i].className.indexOf('scrollerItem') === 0)
            )
            {
                //console.log('Post Title:',divs[i].getElementsByTagName('a')[3].innerText);
                const spans = divs[i].getElementsByTagName('div');
                for (let j = 0; j < spans.length; j++)
                {

                    if (
                        ((spans[j].className.indexOf('s1v') === 0) |
                         (spans[j].className.indexOf('s8r') === 0))
                    )
                    {
                        if (window.flairs.indexOf(spans[j].innerText)!==-1)
                        {
                            console.log('Find flair:',spans[j].innerText,'-> [Hidden]')
                            divs[i].style.display = "none";
                            break;
                        }
                        else
                        {
                            console.log('Find flair:',spans[j].innerText)
                        }
                    }
                    else
                    {
                        if (spans[j].className.indexOf('lrzZ8b0L6AzLkQj5Ww7H1') === 0)
                        {
                            const sp = divs[i].getElementsByTagName('span');
                            for (let k = 0; k < sp.length; k++)
                            {
                                if (window.flairs.indexOf(sp[k].innerText)!==-1)
                                {
                                    console.log('Find flair:',sp[k].innerText,'-> [Hidden]')
                                    divs[i].style.display = "none";
                                    break;
                                }
                                else
                                {
                                    console.log('Find flair:',spans[j].innerText)
                                }
                            }
                        }
                        else
                        {
                            if (spans[j].className.indexOf('_3wiKjmhpIpoTE2r5KCm2o6') === 0)
                            {
                                console.log('Post Title:',spans[j].innerText);
                                for (let k = 0; k < window.word_title.length; k++)
                                {
                                    if (spans[j].innerText.indexOf(window.word_title[k]) !== -1)
                                    {
                                        console.log('Find text[',window.word_title[k],'] in Title -> [Hidden]')
                                        divs[i].style.display = "none";
                                        break loop_for;
                                    }
                                }
                            }
                        }
                    }
                }
            }
        }

    }
    else
    {
        setTimeout(_waitForHide, 10);
    }
};

XMLHttpRequest.prototype.realOpen = XMLHttpRequest.prototype.open;
const newOpen = function (method, url, async, user, password)
{
    this.addEventListener("readystatechange", function ()
                          {
        if (this.readyState === 4)
        {
            if (window.flag)
            {
                window.flag = false;
                setTimeout(window._waitForHide, 0);
            }
        }
    }, false);
    this.realOpen(method, url, async, user, password);
};
XMLHttpRequest.prototype.open = newOpen;

XMLHttpRequest.prototype.realSend = XMLHttpRequest.prototype.send;
const newSend = function (vData)
{
    try
    {
        const arg = JSON.parse(vData);
        if(
            (arg[1].hasOwnProperty('lst')) &&
            (arg[1].lst[0]==="rec")
        )
        {
            window.flag = true;
        }
    }
    catch (e)
    {
    }
    this.realSend(vData);
};
XMLHttpRequest.prototype.send = newSend;