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<h1 class="page-title">Source: mod/dumb.js</h1>
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<pre class="prettyprint source linenums"><code>/* eslint no-param-reassign: 0 */
/* eslint no-multi-assign: 0 */
/**
* @author OpSimple ( https://github.com/OpSimple )
* @summary Muzzle a user
* @version 1.0.0
* @description Globally shadow mute a connection. Optional allies array will see muted messages.
* @module dumb
*/
import {
isModerator,
} from '../utility/_UAC.js';
import {
findUser,
} from '../utility/_Channels.js';
import {
Errors,
} from '../utility/_Constants.js';
import {
legacyInviteReply,
legacyWhisperReply,
} from '../utility/_LegacyFunctions.js';
/**
* Returns the channel that should be invited to.
* @param {any} channel
* @private
* @return {string}
*/
export function getChannel(channel = undefined) {
if (typeof channel === 'string') {
return channel;
}
return Math.random().toString(36).substr(2, 8);
}
/**
* Check and trim string provided by remote client
* @param {string} text - Subject string
* @private
* @todo Move into utility module
* @return {string|boolean}
*/
const parseText = (text) => {
// verifies user input is text
if (typeof text !== 'string') {
return false;
}
let sanitizedText = text;
// strip newlines from beginning and end
sanitizedText = sanitizedText.replace(/^\s*\n|^\s+$|\n\s*$/g, '');
// replace 3+ newlines with just 2 newlines
sanitizedText = sanitizedText.replace(/\n{3,}/g, '\n\n');
return sanitizedText;
};
/**
* Automatically executes once after server is ready
* @param {Object} core - Reference to core enviroment object
* @public
* @return {void}
*/
export function init(core) {
if (typeof core.muzzledHashes === 'undefined') {
core.muzzledHashes = {};
}
}
/**
* Executes when invoked by a remote client
* @param {Object} env - Enviroment object with references to core, server, socket &amp; payload
* @public
* @return {void}
*/
export async function run({
core, server, socket, payload,
}) {
// increase rate limit chance and ignore if not admin or mod
if (!isModerator(socket.level)) {
return server.police.frisk(socket, 10);
}
// check user input
if (socket.hcProtocol === 1) {
if (typeof payload.nick !== 'string') {
return true;
}
payload.channel = socket.channel;
} else if (typeof payload.userid !== 'number') {
return true;
}
// find target user
const targetUser = findUser(server, payload);
if (!targetUser) {
return server.reply({
cmd: 'warn',
text: 'Could not find user in that channel',
id: Errors.Global.UNKNOWN_USER,
channel: socket.channel, // @todo Multichannel
}, socket);
}
// likely dont need this, muting mods and admins is fine
if (targetUser.level >= socket.level) {
return server.reply({
cmd: 'warn',
text: 'This trick wont work on users of the same level',
id: Errors.Global.PERMISSION,
channel: socket.channel, // @todo Multichannel
}, socket);
}
// store hash in mute list
const record = core.muzzledHashes[targetUser.hash] = {
dumb: true,
};
// store allies if needed
if (payload.allies &amp;&amp; Array.isArray(payload.allies)) {
record.allies = payload.allies;
}
// notify mods
server.broadcast({
cmd: 'info',
text: `${socket.nick}#${socket.trip} muzzled ${targetUser.nick} in ${payload.channel}, userhash: ${targetUser.hash}`,
channel: false, // @todo Multichannel, false for global
}, { level: isModerator });
return true;
}
/**
* Automatically executes once after server is ready to register this modules hooks
* @param {Object} server - Reference to server enviroment object
* @public
* @return {void}
*/
export function initHooks(server) {
server.registerHook('in', 'chat', this.chatCheck.bind(this), 10);
server.registerHook('in', 'invite', this.inviteCheck.bind(this), 10);
server.registerHook('in', 'whisper', this.whisperCheck.bind(this), 10);
}
/**
* Executes every time an incoming chat command is invoked;
* hook incoming chat commands, shadow-prevent chat if they are muzzled
* @param {Object} env - Enviroment object with references to core, server, socket &amp; payload
* @public
* @return {{Object|boolean|string}} Object = same/altered payload,
* false = suppress action,
* string = error
*/
export function chatCheck({
core, server, socket, payload,
}) {
if (typeof payload.text !== 'string') {
return false;
}
if (core.muzzledHashes[socket.hash]) {
// build fake chat payload
const outgoingPayload = {
cmd: 'chat',
nick: socket.nick, /* @legacy */
uType: socket.uType, /* @legacy */
userid: socket.userid,
channel: socket.channel,
text: payload.text,
level: socket.level,
};
if (socket.trip) {
outgoingPayload.trip = socket.trip;
}
if (socket.color) {
outgoingPayload.color = socket.color;
}
// broadcast to any duplicate connections in channel
server.broadcast(outgoingPayload, { channel: socket.channel, hash: socket.hash });
// broadcast to allies, if any
if (core.muzzledHashes[socket.hash].allies) {
server.broadcast(
outgoingPayload,
{
channel: socket.channel,
nick: core.muzzledHashes[socket.hash].allies,
},
);
}
/**
* Blanket "spam" protection.
* May expose the ratelimiting lines from `chat` and use that
* @todo one day #lazydev
*/
server.police.frisk(socket, 9);
return false;
}
return payload;
}
/**
* Executes every time an incoming chat command is invoked;
* shadow-prevent all invites from muzzled users
* @param {Object} env - Enviroment object with references to core, server, socket &amp; payload
* @public
* @return {{Object|boolean|string}} Object = same/altered payload,
* false = suppress action,
* string = error
*/
export function inviteCheck({
core, server, socket, payload,
}) {
if (core.muzzledHashes[socket.hash]) {
// check for spam
if (server.police.frisk(socket, 2)) {
return server.reply({
cmd: 'warn',
text: 'You are sending invites too fast. Wait a moment before trying again.',
id: Errors.Invite.RATELIMIT,
channel: socket.channel, // @todo Multichannel
}, socket);
}
// verify user input
// if this is a legacy client add missing params to payload
if (socket.hcProtocol === 1) {
if (typeof socket.channel === 'undefined' || typeof payload.nick !== 'string') {
return true;
}
payload.channel = socket.channel; // eslint-disable-line no-param-reassign
} else if (typeof payload.userid !== 'number' || typeof payload.channel !== 'string') {
return true;
}
// @todo Verify this socket is part of payload.channel - multichannel patch
// find target user
const targetUser = findUser(server, payload);
if (!targetUser) {
return server.reply({
cmd: 'warn',
text: 'Could not find user in that channel',
id: Errors.Global.UNKNOWN_USER,
channel: socket.channel, // @todo Multichannel
}, socket);
}
// generate common channel
const channel = getChannel(payload.to);
// build invite
const outgoingPayload = {
cmd: 'invite',
channel: socket.channel, // @todo Multichannel
from: socket.userid,
to: targetUser.userid,
inviteChannel: channel,
};
// send invite notice to this client
if (socket.hcProtocol === 1) {
server.reply(legacyInviteReply(outgoingPayload, targetUser.nick), socket);
} else {
server.reply(outgoingPayload, socket);
}
return false;
}
return payload;
}
/**
* Executes every time an incoming chat command is invoked;
* shadow-prevent all whispers from muzzled users
* @param {Object} env - Enviroment object with references to core, server, socket &amp; payload
* @public
* @return {{Object|boolean|string}} Object = same/altered payload,
* false = suppress action,
* string = error
*/
export function whisperCheck({
core, server, socket, payload,
}) {
if (core.muzzledHashes[socket.hash]) {
// if this is a legacy client add missing params to payload
if (socket.hcProtocol === 1) {
payload.channel = socket.channel; // eslint-disable-line no-param-reassign
}
// verify user input
const text = parseText(payload.text);
if (!text) {
// lets not send objects or empty text, yea?
return server.police.frisk(socket, 13);
}
// check for spam
const score = text.length / 83 / 4;
if (server.police.frisk(socket, score)) {
return server.reply({
cmd: 'warn', // @todo Add numeric error code as `id`
text: 'You are sending too much text. Wait a moment and try again.\nPress the up arrow key to restore your last message.',
channel: socket.channel, // @todo Multichannel
}, socket);
}
const targetUser = findUser(server, payload);
if (!targetUser) {
return server.reply({
cmd: 'warn',
text: 'Could not find user in that channel',
id: Errors.Global.UNKNOWN_USER,
channel: socket.channel, // @todo Multichannel
}, socket);
}
const outgoingPayload = {
cmd: 'whisper',
channel: socket.channel, // @todo Multichannel
from: socket.userid,
to: targetUser.userid,
text,
};
// send invite notice to this client
if (socket.hcProtocol === 1) {
server.reply(legacyWhisperReply(outgoingPayload, targetUser.nick), socket);
} else {
server.reply(outgoingPayload, socket);
}
targetUser.whisperReply = socket.nick;
return false;
}
return payload;
}
/**
* Module meta information
* @public
* @typedef {Object} dumb/info
* @property {string} name - Module command name
* @property {string} category - Module category name
* @property {string} description - Information about module
* @property {Array} aliases - An array of alternative cmd names
* @property {string} usage - Information about module usage
*/
export const info = {
name: 'dumb',
category: 'moderators',
description: 'Globally shadow mute a connection. Optional allies array will see muted messages.',
aliases: ['muzzle', 'mute'],
usage: `
API: { cmd: 'dumb', nick: '&lt;target nick>', allies: ['&lt;optional nick array>', ...] }`,
};
</code></pre>
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<h2><a href="index.html">Home</a></h2><h3>Modules</h3><ul><li><a href="module-addmod.html">addmod</a></li><li><a href="module-ban.html">ban</a></li><li><a href="module-changecolor.html">changecolor</a></li><li><a href="module-changenick.html">changenick</a></li><li><a href="module-chat.html">chat</a></li><li><a href="module-disconnect.html">disconnect</a></li><li><a href="module-dumb.html">dumb</a></li><li><a href="module-emote.html">emote</a></li><li><a href="module-forcecolor.html">forcecolor</a></li><li><a href="module-help.html">help</a></li><li><a href="module-invite.html">invite</a></li><li><a href="module-join.html">join</a></li><li><a href="module-kick.html">kick</a></li><li><a href="module-listusers.html">listusers</a></li><li><a href="module-morestats.html">morestats</a></li><li><a href="module-ping.html">ping</a></li><li><a href="module-reload.html">reload</a></li><li><a href="module-removemod.html">removemod</a></li><li><a href="module-saveconfig.html">saveconfig</a></li><li><a href="module-session.html">session</a></li><li><a href="module-shout.html">shout</a></li><li><a href="module-socketreply.html">socketreply</a></li><li><a href="module-speak.html">speak</a></li><li><a href="module-stats.html">stats</a></li><li><a href="module-unban.html">unban</a></li><li><a href="module-unbanall.html">unbanall</a></li><li><a href="module-whisper.html">whisper</a></li></ul>
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