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349 lines
14 KiB
TypeScript
349 lines
14 KiB
TypeScript
import * as Utils from './Utils'
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import { WAMessage, WAChat, MessageLogLevel, WANode, KEEP_ALIVE_INTERVAL_MS, BaileysError, WAConnectOptions, DisconnectReason, UNAUTHORIZED_CODES, WAContact, TimedOutError } from './Constants'
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import {WAConnection as Base} from './1.Validation'
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import Decoder from '../Binary/Decoder'
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export class WAConnection extends Base {
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/** Connect to WhatsApp Web */
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async connect() {
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// if we're already connected, throw an error
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if (this.state !== 'close') throw new Error('cannot connect when state=' + this.state)
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const options = this.connectOptions
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this.state = 'connecting'
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this.emit ('connecting')
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let tries = 0
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while (this.state === 'connecting') {
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tries += 1
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try {
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// if the first try failed, delay & connect again
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await this.connectInternal (options, tries > 1 && 2000)
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this.phoneConnected = true
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this.state = 'open'
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} catch (error) {
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const loggedOut = error instanceof BaileysError && UNAUTHORIZED_CODES.includes(error.status)
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const willReconnect = !loggedOut && (tries <= (options?.maxRetries || 5)) && this.state === 'connecting'
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this.log (`connect attempt ${tries} failed: ${error}${ willReconnect ? ', retrying...' : ''}`, MessageLogLevel.info)
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if ((this.state as string) !== 'close' && !willReconnect) {
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this.closeInternal (loggedOut ? DisconnectReason.invalidSession : error.message)
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}
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if (!willReconnect) throw error
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}
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}
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this.emit ('open')
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this.releasePendingRequests ()
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this.startKeepAliveRequest()
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this.log ('opened connection to WhatsApp Web', MessageLogLevel.info)
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this.conn.on ('close', () => this.unexpectedDisconnect (DisconnectReason.close))
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return this
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}
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/** Meat of the connect logic */
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protected async connectInternal (options: WAConnectOptions, delayMs?: number) {
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// actual connect
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const connect = () => {
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const tasks: Promise<void>[] = []
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const timeoutMs = options?.timeoutMs || 60*1000
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const { ws, cancel } = Utils.openWebSocketConnection (5000, false)
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let cancelTask: () => void
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if (typeof options?.waitForChats === 'undefined' ? true : options?.waitForChats) {
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const {waitForChats, cancelChats} = this.receiveChatsAndContacts(timeoutMs, true)
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tasks.push (waitForChats)
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cancellations.push (cancelChats)
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cancelTask = () => { cancelChats(); cancel() }
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} else cancelTask = cancel
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// determine whether reconnect should be used or not
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const shouldUseReconnect = this.lastDisconnectReason !== DisconnectReason.replaced &&
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this.lastDisconnectReason !== DisconnectReason.unknown &&
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this.lastDisconnectReason !== DisconnectReason.intentional && this.user
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const reconnectID = shouldUseReconnect ? this.user.jid.replace ('@s.whatsapp.net', '@c.us') : null
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const promise = Utils.promiseTimeout(timeoutMs, (resolve, reject) => {
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ws
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.then (conn => this.conn = conn)
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.then (() => this.conn.on('message', data => this.onMessageRecieved(data as any)))
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.then (() => (
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this.log(`connected to WhatsApp Web server, authenticating via ${reconnectID ? 'reconnect' : 'takeover'}`, MessageLogLevel.info)
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))
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.then (() => this.authenticate(reconnectID))
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.then (() => (
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this.conn
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.removeAllListeners ('error')
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.removeAllListeners('close')
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))
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.then (resolve)
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.catch (reject)
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})
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.catch (err => {
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this.removePendingCallbacks ()
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throw err
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}) as Promise<void>
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tasks.push (promise)
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return {
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promise: Promise.all (tasks),
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cancel: cancelTask
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}
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}
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let promise = Promise.resolve ()
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let cancellations: (() => void)[] = []
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const cancel = () => cancellations.forEach (cancel => cancel())
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this.on ('close', cancel)
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if (delayMs) {
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const {delay, cancel} = Utils.delayCancellable (delayMs)
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promise = delay
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cancellations.push (cancel)
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}
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return promise
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.then (() => {
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const {promise, cancel} = connect ()
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cancellations.push (cancel)
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return promise
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})
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.finally (() => {
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cancel()
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this.off('close', cancel)
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})
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}
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/**
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* Sets up callbacks to receive chats, contacts & messages.
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* Must be called immediately after connect
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* @returns [chats, contacts]
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*/
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protected receiveChatsAndContacts(timeoutMs: number = null, stopAfterMostRecentMessage: boolean=false) {
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this.contacts = {}
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this.chats.clear ()
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let receivedContacts = false
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let receivedMessages = false
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let resolveTask: () => void
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const deregisterCallbacks = () => {
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// wait for actual messages to load, "last" is the most recent message, "before" contains prior messages
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this.deregisterCallback(['action', 'add:last'])
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if (!stopAfterMostRecentMessage) {
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this.deregisterCallback(['action', 'add:before'])
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this.deregisterCallback(['action', 'add:unread'])
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}
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this.deregisterCallback(['response', 'type:chat'])
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this.deregisterCallback(['response', 'type:contacts'])
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}
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const checkForResolution = () => {
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if (receivedContacts && receivedMessages) resolveTask ()
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}
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// wait for messages to load
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const chatUpdate = json => {
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receivedMessages = true
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const isLast = json[1].last || stopAfterMostRecentMessage
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const messages = json[2] as WANode[]
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if (messages) {
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messages.reverse().forEach (([,, message]: ['message', null, WAMessage]) => {
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const jid = message.key.remoteJid
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const chat = this.chats.get(jid)
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chat?.messages.unshift (message)
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})
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}
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// if received contacts before messages
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if (isLast && receivedContacts) checkForResolution ()
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}
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// wait for actual messages to load, "last" is the most recent message, "before" contains prior messages
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this.registerCallback(['action', 'add:last'], chatUpdate)
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if (!stopAfterMostRecentMessage) {
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this.registerCallback(['action', 'add:before'], chatUpdate)
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this.registerCallback(['action', 'add:unread'], chatUpdate)
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}
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// get chats
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this.registerCallback(['response', 'type:chat'], json => {
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if (json[1].duplicate || !json[2]) return
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json[2]
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.forEach(([item, chat]: [any, WAChat]) => {
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if (!chat) {
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this.log (`unexpectedly got null chat: ${item}, ${chat}`, MessageLogLevel.info)
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return
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}
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chat.jid = Utils.whatsappID (chat.jid)
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chat.t = +chat.t
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chat.count = +chat.count
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chat.messages = []
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const oldChat = this.chats.get(chat.jid)
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oldChat && this.chats.delete (oldChat)
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this.chats.insert (chat) // chats data (log json to see what it looks like)
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})
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this.log (`received ${json[2].length} chats`, MessageLogLevel.info)
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if (json[2].length === 0) {
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receivedMessages = true
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checkForResolution ()
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}
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})
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// get contacts
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this.registerCallback(['response', 'type:contacts'], json => {
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if (json[1].duplicate || !json[2]) return
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receivedContacts = true
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json[2].forEach(([type, contact]: ['user', WAContact]) => {
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if (!contact) return this.log (`unexpectedly got null contact: ${type}, ${contact}`, MessageLogLevel.info)
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contact.jid = Utils.whatsappID (contact.jid)
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this.contacts[contact.jid] = contact
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})
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this.log (`received ${json[2].length} contacts`, MessageLogLevel.info)
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checkForResolution ()
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})
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// wait for the chats & contacts to load
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const {delay, cancel} = Utils.delayCancellable (timeoutMs)
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const waitForChats = Promise.race ([
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new Promise (resolve => resolveTask = resolve),
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delay.then (() => { throw TimedOutError() })
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])
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.then (() => (
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this.chats
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.all ()
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.forEach (chat => {
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const respectiveContact = this.contacts[chat.jid]
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chat.name = respectiveContact?.name || respectiveContact?.notify || chat.name
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})
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))
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.finally (deregisterCallbacks)
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return { waitForChats, cancelChats: cancel }
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}
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private releasePendingRequests () {
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this.pendingRequests.forEach (({resolve}) => resolve()) // send off all pending request
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this.pendingRequests = []
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}
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private onMessageRecieved(message: string | Buffer) {
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if (message[0] === '!') {
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// when the first character in the message is an '!', the server is updating the last seen
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const timestamp = message.slice(1, message.length).toString ('utf-8')
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this.lastSeen = new Date(parseInt(timestamp))
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} else {
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const decrypted = Utils.decryptWA (message, this.authInfo?.macKey, this.authInfo?.encKey, new Decoder())
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if (!decrypted) return
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const [messageTag, json] = decrypted
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if (this.logLevel === MessageLogLevel.all) {
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this.log(messageTag + ', ' + JSON.stringify(json), MessageLogLevel.all)
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}
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/*
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Check if this is a response to a message we sent
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*/
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if (this.callbacks[messageTag]) {
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const q = this.callbacks[messageTag]
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q.callback(json)
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delete this.callbacks[messageTag]
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return
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}
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/*
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Check if this is a response to a message we are expecting
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*/
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if (this.callbacks['function:' + json[0]]) {
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const callbacks = this.callbacks['function:' + json[0]]
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let callbacks2
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let callback
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for (const key in json[1] || {}) {
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callbacks2 = callbacks[key + ':' + json[1][key]]
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if (callbacks2) {
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break
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}
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}
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if (!callbacks2) {
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for (const key in json[1] || {}) {
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callbacks2 = callbacks[key]
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if (callbacks2) {
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break
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}
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}
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}
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if (!callbacks2) {
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callbacks2 = callbacks['']
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}
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if (callbacks2) {
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callback = callbacks2[json[2] && json[2][0][0]]
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if (!callback) {
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callback = callbacks2['']
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}
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}
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if (callback) {
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callback(json)
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return
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}
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}
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if (this.logLevel === MessageLogLevel.unhandled) {
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this.log('[Unhandled] ' + messageTag + ', ' + JSON.stringify(json), MessageLogLevel.unhandled)
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}
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}
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}
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/** Send a keep alive request every X seconds, server updates & responds with last seen */
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private startKeepAliveRequest() {
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this.keepAliveReq && clearInterval (this.keepAliveReq)
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this.keepAliveReq = setInterval(() => {
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if (!this.lastSeen) this.lastSeen = new Date ()
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const diff = new Date().getTime() - this.lastSeen.getTime()
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/*
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check if it's been a suspicious amount of time since the server responded with our last seen
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it could be that the network is down
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*/
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if (diff > KEEP_ALIVE_INTERVAL_MS+5000) this.unexpectedDisconnect (DisconnectReason.lost)
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else if (this.conn) this.send ('?,,') // if its all good, send a keep alive request
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// poll phone connection as well,
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// 5000 ms for timeout
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this.checkPhoneConnection (5000)
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.then (connected => {
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this.phoneConnected !== connected && this.emit ('connection-phone-change', {connected})
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this.phoneConnected = connected
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})
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}, KEEP_ALIVE_INTERVAL_MS)
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}
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/**
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* Check if your phone is connected
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* @param timeoutMs max time for the phone to respond
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*/
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async checkPhoneConnection(timeoutMs = 5000) {
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if (this.state !== 'open') return false
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try {
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const response = await this.query({json: ['admin', 'test'], timeoutMs, waitForOpen: false})
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return response[1] as boolean
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} catch (error) {
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return false
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}
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}
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}
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