2ch_wipe.user.js

// ==UserScript==
// @name Wipe threads on 2ch.hk
// @namespace https://2ch.hk/
// @version 0.4.1
// @description Wipes threads. Duh.
// @match https://2ch.hk/*
// ==/UserScript==

const wipeText = 'W'.repeat(12000);

const emailInput = document.getElementById('e-mail');
const textArea = document.getElementById('shampoo');
const form = document.getElementById('postform');

const getWipeText = () => {
    const raw_posts = document.getElementsByClassName('postbtn-reply-href post__reflink');
    const posts = Array.prototype.slice.call(raw_posts, 0, 30);
    replies = Array.prototype.map.call(posts, (post) => `>>${post.textContent}`).join('\n');
    return `${replies}\n\n${wipeText}`;
};

const wipe = () => {
    emailInput.value = 'sage';
    textArea.value = getWipeText();
};

const setUp = () => {
    const wipeButton = document.createElement('input');

    wipeButton.className = 'button desktop';
    wipeButton.id = 'wipe';
    wipeButton.type = 'button';
    wipeButton.value = 'Wipe';
    wipeButton.onclick = wipe;

    emailInput.after(wipeButton);
};

setUp();

/**
 * Just hit the 'Wipe' button next to the email input and submit the form.
 * Script will reply to the first 30 posts which will make the thread unreadable.
 * 30 posts is Wakaba's limit: any >>reply beyond 30 will just be greentexted.
 * 
 * TODO:
 *   - Utilize a captcha resolver like anti-captcha.com or whatever;
 *   - Make 'Wipe' button a switch so it automatically posts with set timeout.
 */