the-guard-banfiles-plugin

banfiles.js

'use strict';
const Composer = require('telegraf/composer');

const blacklisted_files = [ 'apk', 'exe', 'scr', 'bat', 'cmd', 'vbs', 'pif' ];

module.exports = Composer.mount('document', (ctx, next) =>
        ctx.from.status !== 'admin' &&
                blacklisted_files.includes(
                        ctx.message.document.file_name.split('.').pop())
                ? Promise.all([
                        ctx.ban({
                                admin: ctx.botInfo,
                                reason: 'Blacklisted file.',
                                userToBan: ctx.from }),
                        ctx.deleteMessage() ])
                : next());

This is now part of https://github.com/thedevs-network/the-guard-bot-plugins