WhatsApp Web - Displays Desktop Notifications when a user gets online [console]

whatsapp-web-online-notifier.js

(function (window) {
	var DOUBLE_CLICK_DELAY = 550;
	var OnlineNotifier = (function () {
	var LOG_LEVEL = 01;
	var POLL_TIMEOUT = 1E3;
	var MIN_TIMEOUT = 60E3;
	var MIN_TIMEOUT_TYPING = 5E3
	var DEBUG_CHECK_ALL = false;
	var DEBUG_CHECK_ONLINE = false;
	var DEBUG_CHECK_TYPING = false;
	var DEBUG_CHECK_COUNT = 27 * 3
	var DEBUG_TIMEOUT = 1E3
	var DEBUG_CHANCE = .33
	var NOTIFY_SUBSCRIBE = true;
	
	
	var debug = DEBUG_CHECK_ALL || DEBUG_CHECK_ONLINE || DEBUG_CHECK_TYPING
	
	if (debug) {
		POLL_TIMEOUT = DEBUG_TIMEOUT
	}
	
	var chats = Store.Chat.models.slice ();
	
	var msg = {
		online: "Online",
		offline:"Offline",
		typing: "Typing...",
		unsubscribing: "...unsubscribing %s.",
		subscribing: "... subscribing %s.",
		check: "checking state: %s [%s].",
		handle: "... check sucessfull. calling handler.",
		look: "looking for people online... found %d.",
		timeout: "scheduling next check in %dms.",
		reset:"reseted",
		started:"started",
		state: "Last seen: %0",
		subscribed:"enabled notifications",
		unsubscribed:"disabled notifications",
		ppurl: "https://dyn.web.whatsapp.com/pp?t=s&u=%user%&i=%tag%"
	}
	
	var debug_last = "offline";
	var debug_time = 0
	var debug_state = 0;
	var checks = {
		online: function (contact,name) {
			if (DEBUG_CHECK_ONLINE) {
			    return debug_state === OnlineNotifier.observe.online;
			}
			return contact.presence._values.isOnline 
		},
		typing: function (contact, name) {	
			if (DEBUG_CHECK_TYPING) {
			    return  debug_state === OnlineNotifier.observe.typing;
			}

			return contact._values.typing || DEBUG_CHECK_TYPING
		},
		offline: function (contact, name) {
		    return !checks.online.call(this,contact, name) && !checks.typing.call (this,contact, name);
		}
	}
	
	var util = {	
	    extract: function (keys, src, trg) {
	         if (!Array.isArray (keys)) keys = Object.keys (keys);
			 trg = trg || {}
		     return keys.reduce (function (trg,key) {
			      trg [key] = src [key];
			      return trg;
			 }, trg);
		}
	}
	var handler = {
		online: function (contact, name) {
			log (10, "Handler", "online");
			var state = this.getState (name);
			if ( state.changed || +new Date - MIN_TIMEOUT > contact._lastnotification) {
				log (10, "Handler", "changed", state.changed)
				notify (contact, "online")
			}
		},
		typing: function (contact,name) {
			var state = this.getState (name);
			if ( state.changed || +new Date - MIN_TIMEOUT_TYPING > contact._lastnotification) {
				notify (contact, "typing")
			}
		},
		offline: function (contact,name) {
			log (10, "Handler","offline")
			var state = this.getState (name)
			if (state.state === "online" || state.changed)
				notify (contact, "offline");
	
		}
	}
	var OnlineNotifier = function (startMonitor) {
		this.watch = OnlineNotifier.observe.online + OnlineNotifier.observe.typing;
		this.subscribed = [];
		this.unsubscribed = chats.slice ();
		this._timeout = 0;
		this._lastnotification = +new Date - MIN_TIMEOUT
		this._states = {};
		
		this.load ()
		this.monitor (startMonitor)
		notify (0,"started");
	}
	OnlineNotifier._notifications = {}
	OnlineNotifier.storageKey = "mon"
	OnlineNotifier.LOG_LEVEL = LOG_LEVEL;
	OnlineNotifier.prototype.timeout = POLL_TIMEOUT;
	OnlineNotifier.observe = {
		offline:0,
		online: 1,
		typing: 2,
		
	}
	
	OnlineNotifier.contacts = {
		byName: function () {
			return chats.reduce (function (a,b) {
				var values = b._values;
				var name = values.name;
				a [name] = b;
				return a
			}, {});
		},
		byId: function () {
			return chats.reduce (function (a,b) {
				var values = b._values;
				var name = values.id;
				a [name] = b;
				return a
			}, {});
		},
		filter: {
			name: filter.bind (0,"name"),
            id: filter.bind (0,"id")
		},
		gen: {
			ppurl: function (contact, cb) {
				var id = contact._values.id;
				log (9, "Generating Profile Picture Url")
				Store.Wap.profilePicFind( "ProfilePicThumb", id).then (function (data) {
					var tag = data.tag;
					var url = msg.ppurl.replace ("%user%", id).replace ("%tag%",tag)
					cb (url, tag)
				})
			}
		}
		
	}
	
	function notify (contact, status) {
		if (!contact && status) {
			return new Notification ("OnlineNotifier", {tag:"system",body:msg[status]});
		}
		if (!contact._lastnotification) contact._lastnotification = 0;
		//if (+new Date - MIN_TIMEOUT > contact._lastnotification) {
            var n = OnlineNotifier.contacts.filter.name (contact);
			m = msg [status]
			for (var i = 2; i < arguments.length; i++) {
				m = m.replace ("%"+(i-2), arguments [i])
			}
			log (9,"Preparing Notification for ", n)
			OnlineNotifier.contacts.gen.ppurl (contact, function (url, tag) {
			    //tag = status + "-" + tag;
				contact._lastnotification = +new Date
                log (10,"Displaying notification",tag);
				OnlineNotifier._notifications [n] = new Notification (n, {
					body: m,
					icon: url,
                    tag:  tag
				});
			})
		//}

	}
	

	
	function log (lvl) {
		if (OnlineNotifier.LOG_LEVEL >= lvl) {
			console.log.apply (console, [].slice.call (arguments, 1));
		}
	}

    function filter (attr, contacts) {
				if (!Array.isArray (contacts)) {contacts = [contacts]}
				return contacts.map (function (a) {
					return a._values [attr];
				})
    }

	
	OnlineNotifier.prototype.getOnline = function () {
		if (DEBUG_CHECK_ONLINE || (this.watched & OnlineNotifier.observe.offline) == OnlineNotifier.observe.offline) {
			return this.subscribed;
		}
		return this.subscribed.filter (checks.online);
	}
	
	
	OnlineNotifier.prototype.monitor = function mon(subscribeTo) {	
		this.save ();
		var that = this;
		if (subscribeTo) {
			this.subscribe (subscribeTo)
		}
		var online = this.getOnline ();
		var state = "";
		var oldstate = "";
		var newstate;
		log (4, msg ["look"], online.length);
		for (var key in OnlineNotifier.observe) {
			var val = OnlineNotifier.observe [key];
			var now = +new Date;
			if ((this.watch & val) === val)
			for (var i=0; i<online.length; i++) {
				var contact = online [i];
				var name = OnlineNotifier.contacts.filter.name (contact) [0]
				log (6, msg ["check"],key,name);
				if (checks [key].call(this,contact,name) || DEBUG_CHECK_ALL) {
					log (7, msg ["handle"], key, handler [key])
					state = OnlineNotifier.observe[key];
					oldstate = this.getState (name).state;
					newstate = {state: state, t:now, changed: state !== oldstate,id : contact._values.id};
					newstate[state] = now
					
					util.extract (newstate, newstate, this.getState (name))
					handler [key] && handler[key].call (this,contact, name);
					log (10, "new state", state, oldstate, this.getState(name));
				} 
			}
		}

		log (9,"check debug", debug_state, debug_time)
		if ((debug_time % DEBUG_CHECK_COUNT) === 0) {
			debug_state =  (debug_state + 1) % 3
		}
		debug_time++;
			
		if (this._timeout == -1) {
			this._timeout = 0;
			this.save ()
		} else {
			this._timeout = setTimeout (function () {
			   mon.call (that);
			}, this.timeout)
			this.save()
			log (7, msg ["timeout"], this.timeout, this._timeout)
		}
		
	}
	
	OnlineNotifier.prototype.showStates = function () {
		for (var key in this._states) {
			var state = this.getState (key);
			notify (this.getChatById (state.id), "state", state[1])
		}
	}
	OnlineNotifier.prototype.subscribe = function (contacts,reverse) {
		var byName;
		var srcTrg = [this.unsubscribed, this.subscribed];
		var srcInd = 0 + ~~reverse;
		var msgPre = reverse ? "un":""
		var wasRunning = this.isRunning ();
		if (wasRunning) {
			log (4, "pausing");
			this.cancel ();
		}
		if (!Array.isArray (contacts)) {
			return this.subscribe (typeof contacts === "string"?[contacts]:[], reverse)
		} else if (typeof contacts [0] == "string") {
			byName = OnlineNotifier.contacts.byName ();
			byId = OnlineNotifier.contacts.byId ();
			contacts = contacts.map (function (a) {
				if (byId.hasOwnProperty (a)) {
					return byId [a]
				} else if(byName.hasOwnProperty (a)){
					return byName [a];
				}
				
			});
		}

		for (var i = 0; i < contacts.length; i++) {
			var contact = contacts [i]			
			var ind = srcTrg [srcInd].indexOf (contact);
			srcTrg[(srcInd + 1) % 2].push (srcTrg [srcInd].splice (ind, 1)[0])
			log (5,msg [msgPre + "subscribing"], contact._values.name)
			if (NOTIFY_SUBSCRIBE) {
				notify (contact, msgPre + "subscribed")
			}
		}
		if (wasRunning) {
			log (4, "resuming")
			this.monitor ();
		}
		log (3, msg[msgPre+"subscribed"], OnlineNotifier.contacts.filter.name (contacts))

	}
	
	OnlineNotifier.prototype.unsubscribe = function (contacts) {
		//var s="subscribed";
		//var u="un"+s;
		

		//swap (this, s, u);
		this.subscribe (contacts,true);

	}
	OnlineNotifier.prototype.isRunning = function () {
		return this._timeout > 0
	}
	OnlineNotifier.prototype.cancel = function () {
		
	    clearTimeout (this._timeout);
		this._timeout = -1
	}

	OnlineNotifier.prototype.getOptions = function () { 
	    var opt = util.extract (["timeout","_timeout"], this);
		opt._subscribed = this.subscribed.map (function (a) {
			return a._values.name;
		});
		return opt;
	}
	OnlineNotifier.prototype.subscribeAll = function () {
		return this.subscribe (this.unsubscribed);
	}
	
	OnlineNotifier.prototype.getState = function (name) {
		if (!this._states [name])
			this._states [name] = {state: -1, t:+ new Date, changed: true}
		return this._states [name]
	}
	
	
	OnlineNotifier.prototype.save = function () {
		var opt = this.getOptions ();
		localStorage [OnlineNotifier.storageKey] = JSON.stringify (opt);
	}
	OnlineNotifier.prototype.load = function () {
		var options;
		try {
			options = JSON.parse (localStorage [OnlineNotifier.storageKey]);
		} catch (e) {
			options = {}
		}
		util.extract (options,options,this);
		this.subscribe (options._subscribed);
	}
	OnlineNotifier.e = util.extract;
	
	OnlineNotifier.prototype.onBookmarkTriggered = function (open,dblclick) {
		delete window.monTriggerTimeout
		var active = Store.Chat.active ();
		var chat;
		
		
		if (open) {
			return;
		}
		if (dblclick) {
			notify (0, "dbc")
			return ;
		}
		if (typeof active == "undefined") {
			this.reset ();
		} else {
			chat = this.getChatById (active);
			if (!~active.indexOf (this.subscribed)) {
				this.unsubscribe (active);
				
			} else {
				this.subscribe (active);
			}
		}
			setTimeout (this.monitor.bind(this),0);
	}
	OnlineNotifier.prototype.getChatById = function (id) {
		return OnlineNotifier.contacts.byId ()[id]
	}
	OnlineNotifier.prototype.reset = function () {
		notify (0, "reset")
		delete localStorage [OnlineNotifier.storageKey];
	}
	return OnlineNotifier
	
	
})()

if  (!window.mon ) {
	window.mon = new OnlineNotifier ();
	//window.mon.onBookmarkTriggered (true,false);
} else if (window.monTriggerTimeout) {
	clearTimeout (window.monTriggerTimeout);
	window.mon.onBookmarkTriggered (false,true);
} else if (!window.monTriggerTimeout) {
	window.monTriggerTimeout = window.setTimeout (window.mon.onBookmarkTriggered.bind (window.mon,false,false), DOUBLE_CLICK_DELAY);
}
})(window);

Could anyone help on how to do it, after i press f12 and go to console and enter the code it says " error reference "

This was supposed to be used as a bookmarklet.
You select the chat you want to be notified for and run the bookmarklet to enable notifications; run again to turn them off.

I don't know if it's still working in 2019

hello, does anyone know if this is working as of 10.9.2020? been trying to make something similar.