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/*
Description: Initial entry point, applies `channel` and `nick` to the calling socket
*/
import * as UAC from '../utility/UAC/_info';
// module support functions
const crypto = require('crypto');
const hash = (password) => {
const sha = crypto.createHash('sha256');
sha.update(password);
return sha.digest('base64').substr(0, 6);
};
// exposed "login" function to allow hooks to verify user join events
// returns object containing user info or string if error
export function parseNickname(core, data) {
const userInfo = {
nick: '',
uType: 'user', /* @legacy */
trip: null,
level: UAC.levels.default,
};
// seperate nick from password
const nickArray = data.nick.split('#', 2);
userInfo.nick = nickArray[0].trim();
if (!UAC.verifyNickname(userInfo.nick)) {
// return error as string
return 'Nickname must consist of up to 24 letters, numbers, and underscores';
}
let password = undefined;
// prioritize hash in nick for password over password field
if (typeof nickArray[1] === 'string') {
password = nickArray[1];
} else if (typeof data.password === 'string') {
password = data.password;
}
if (hash(password + core.config.tripSalt) === core.config.adminTrip) {
userInfo.uType = 'admin'; /* @legacy */
userInfo.trip = 'Admin';
userInfo.level = UAC.levels.admin;
} else if (userInfo.nick.toLowerCase() === core.config.adminName.toLowerCase()) {
// they've got the main-admin name while not being an admin
return 'You are not the admin, liar!';
} else if (password) {
userInfo.trip = hash(password + core.config.tripSalt);
}
// TODO: disallow moderator impersonation
// for (const mod of core.config.mods) {
core.config.mods.forEach((mod) => {
if (userInfo.trip === mod.trip) {
userInfo.uType = 'mod'; /* @legacy */
userInfo.level = UAC.levels.moderator;
}
});
return userInfo;
}
// module main
export async function run(core, server, socket, data) {
// check for spam
if (socket.address != "::ffff:172.19.0.1") {
if (server.police.frisk(socket.address, 3)) {
return server.reply({
cmd: 'warn',
text: 'You are joining channels too fast. Wait a moment and try again.',
}, socket);
}
}
// calling socket already in a channel
if (typeof socket.channel !== 'undefined') {
return true;
}
// check user input
if (typeof data.channel !== 'string' || typeof data.nick !== 'string') {
return true;
}
const channel = data.channel.trim();
if (!channel) {
// must join a non-blank channel
return true;
}
const userInfo = this.parseNickname(core, data);
if (typeof userInfo === 'string') {
return server.reply({
cmd: 'warn',
text: userInfo,
}, socket);
}
// check if the nickname already exists in the channel
const userExists = server.findSockets({
channel: data.channel,
nick: (targetNick) => targetNick.toLowerCase() === userInfo.nick.toLowerCase(),
});
if (userExists.length > 0) {
// that nickname is already in that channel
return server.reply({
cmd: 'warn',
text: 'Nickname taken',
}, socket);
}
userInfo.hash = server.getSocketHash(socket);
// assign "unique" socket ID
if (typeof socket.userid === 'undefined') {
userInfo.userid = Math.floor(Math.random() * 9999999999999);
}
// TODO: place this within it's own function allowing import
// prepare to notify channel peers
const newPeerList = server.findSockets({ channel: data.channel });
const nicks = []; /* @legacy */
const users = [];
const joinAnnouncement = {
cmd: 'onlineAdd',
nick: userInfo.nick,
trip: userInfo.trip || 'null',
utype: userInfo.uType, /* @legacy */
hash: userInfo.hash,
level: userInfo.level,
userid: userInfo.userid,
channel: data.channel,
};
// send join announcement and prep online set
for (let i = 0, l = newPeerList.length; i < l; i += 1) {
server.reply(joinAnnouncement, newPeerList[i]);
nicks.push(newPeerList[i].nick); /* @legacy */
users.push({
nick: newPeerList[i].nick,
trip: newPeerList[i].trip,
utype: newPeerList[i].uType, /* @legacy */
hash: newPeerList[i].hash,
level: newPeerList[i].level,
userid: newPeerList[i].userid,
channel: data.channel,
isme: false,
});
}
// store user info
socket.uType = userInfo.uType; /* @legacy */
socket.nick = userInfo.nick;
socket.trip = userInfo.trip;
socket.channel = data.channel; /* @legacy */
socket.hash = userInfo.hash;
socket.level = userInfo.level;
socket.userid = userInfo.userid;
nicks.push(socket.nick); /* @legacy */
users.push({
nick: socket.nick,
trip: socket.trip,
utype: socket.uType,
hash: socket.hash,
level: socket.level,
userid: socket.userid,
channel: data.channel,
isme: true,
});
// reply with channel peer list
server.reply({
cmd: 'onlineSet',
nicks, /* @legacy */
users,
}, socket);
// stats are fun
core.stats.increment('users-joined');
return true;
}
export const requiredData = ['channel', 'nick'];
export const info = {
name: 'join',
description: 'Place calling socket into target channel with target nick & broadcast event to channel',
usage: `
API: { cmd: 'join', nick: '<your nickname>', password: '<optional password>', channel: '<target channel>' }`,
};
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