main.js

var parseMidi = require('midi-file').parseMidi;
var writeMidi = require('midi-file').writeMidi;

var inst_to_track = {"piano":0,"violin":1,"cello":2,"bass":3,"guitar":4,"flute":5,"clarinet":6,"trumpet":7,"harp":8,"drum":9};
var inst_to_instgroup = {"piano":"piano","violin":"strings","cello":"strings","bass":"bass","guitar":"guitar","flute":"winds","clarinet":"winds","trumpet":"winds","harp":"harp","drums":"drums"};

window.copyup = function(elemid) {
	document.getElementById("inbox").value = document.getElementById(elemid).value.trim();
	window.encodingToMidiFile(document.getElementById("inbox").value, "download_inbox");
}

window.importMidi = function() {
	alert("For best results, assign different tracks to different instruments out of Piano, Violin, Cello, Bass, Guitar, Flute, Clarinet, Trumpet, Harp, and Drums.\n" +
		  "The base MIDI linked to the right is already set up with these tracks.");
	javascript:document.getElementById('file-input').click();
}
window.importMidiOpenAI = function() {
	alert("For best results, use a tempo of 62.5, 125, or 250.");
	if (!window.isLoading) {
		javascript:document.getElementById('file-input-openai').click();
	}
}
window.importMidiFile = function(file) {
	var reader = new FileReader();
	reader.readAsArrayBuffer(file);
	window.file = file;

	reader.onload = readerEvent => {
		var content = new Uint8Array(readerEvent.target.result);
		var midiData = parseMidi(content);

		var mergedTrack = [];
		var originalOrder = 0;
		for (var i=0; i<midiData.tracks.length; i++) {
			var startTime = 0;
			for (var j=0; j<midiData.tracks[i].length; j++) {
				var event = midiData.tracks[i][j];
				startTime += event.deltaTime;
				event.startTime = Math.round(startTime * 48 / midiData.header.ticksPerBeat);
				event.originalOrder = originalOrder;
				mergedTrack.push(event);
				originalOrder++;
			}
		}
		mergedTrack.sort(function(a, b){
			if(a.startTime < b.startTime) { return -1; }
			if(a.startTime > b.startTime) { return 1; }
			if(a.originalOrder < b.originalOrder) { return -1; }
			if(a.originalOrder > b.originalOrder) { return 1; }
			return 0;
		})

		document.getElementById("piano").checked = false;
		document.getElementById("strings").checked = false;
		document.getElementById("winds").checked = false;
		document.getElementById("drums").checked = false;
		document.getElementById("harp").checked = false;
		document.getElementById("guitar").checked = false;
		document.getElementById("bass").checked = false;

		var encoded = "";
		var currentInsts = [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0];
		for (var i=0; i<mergedTrack.length; i++) {
			var event = mergedTrack[i];
			var deltaTime = (i == 0) ? event.startTime : (event.startTime - mergedTrack[i-1].startTime);
			var timeLeftToWait = deltaTime;
			while (timeLeftToWait > 0) {
				var waitTime = timeLeftToWait > 128 ? 128 : timeLeftToWait;
				var token = 3968 + waitTime - 1;
				encoded += token + " ";
				timeLeftToWait -= waitTime;
			}

			if (event.type == "programChange") {
				currentInsts[event.channel] = event.programNumber;
			}
			var currentInst = currentInsts[event.channel];
			var inst;
			var baseNoteOn;
			var baseNoteOff;
			var checkboxID;
			if ([40,41,44,45,48,49,50,51].indexOf(currentInst) > -1) {
				inst = "violin";
				baseNoteOn = 14*128;
				baseNoteOff = 15*128;
				checkboxID = "strings";
			} else if ([42,43].indexOf(currentInst) > -1) {
				inst = "cello";
				baseNoteOn = 16*128;
				baseNoteOff = 17*128;
				checkboxID = "strings";
			} else if ([32,33,34,35,36,37,38,39].indexOf(currentInst) > -1) {
				inst = "bass";
				baseNoteOn = 18*128;
				baseNoteOff = 19*128;
				checkboxID = "bass";
			} else if ([24,25,26,27,28,29,30,31].indexOf(currentInst) > -1) {
				inst = "guitar";
				baseNoteOn = 20*128;
				baseNoteOff = 21*128;
				checkboxID = "guitar";
			} else if ([72,73,74,75,76,77,78,79].indexOf(currentInst) > -1) {
				inst = "flute";
				baseNoteOn = 22*128;
				baseNoteOff = 23*128;
				checkboxID = "winds";
			} else if ([64,65,66,67,68,69,70,71].indexOf(currentInst) > -1) {
				inst = "clarinet";
				baseNoteOn = 24*128;
				baseNoteOff = 25*128;
				checkboxID = "winds";
			} else if ([56,57,58,59,60,61,62,63].indexOf(currentInst) > -1) {
				inst = "trumpet";
				baseNoteOn = 26*128;
				baseNoteOff = 27*128;
				checkboxID = "winds";
			} else if ([46].indexOf(currentInst) > -1) {
				inst = "harp";
				baseNoteOn = 28*128;
				baseNoteOff = 29*128;
				checkboxID = "harp";
			} else {
				inst = "piano";
				var baseNoteGroup = Math.round(event.velocity/8) - 2;
				if (baseNoteGroup < 1) { baseNoteGroup = 1; }
				if (baseNoteGroup > 13) { baseNoteGroup = 13; }
				baseNoteOn = baseNoteGroup*128;
				baseNoteOff = 0*128;
				checkboxID = "piano";
			}

			if (event.channel == 9) {
				inst = "drum";
				baseNoteOn = 3840;
				baseNoteOff = null;
				checkboxID = "drums";
			}
			if (event.type == "noteOff" || (event.type == "noteOn" && event.velocity==0)) {
				if (baseNoteOff !== null) {
					token = baseNoteOff + event.noteNumber;
					encoded += token + " ";
				}
			} else if (event.type == "noteOn" && event.velocity > 0) {
				token = baseNoteOn + event.noteNumber;
				encoded += token + " ";
				document.getElementById(checkboxID).checked = true;
			}
		}

		document.getElementById("inbox").value = encoded.trim();
		window.encodingToMidiFile(document.getElementById("inbox").value, "download_inbox");
	}
}
window.importMidiFileOpenAI = function(file) {
	var reader = new FileReader();
	reader.readAsDataURL(file);
	window.file = file;
	
	startLoading();

	reader.onload = readerEvent => {
		var b64content = "b'" + readerEvent.target.result.split(',')[1] + "'";
		console.log(b64content);
		fetch("https://musenet.openai.com/midi", {
			"method": "POST",
			"headers": {
				"Content-Type": "application/json"
			},
			"body": JSON.stringify({
				"midi": b64content,
				"audioFormat": document.getElementById("format").value
			})
		}).then(res => res.json()).then(function (response) {
			document.getElementById("inbox").value = response.completions[0].encoding;
			window.encodingToMidiFile(document.getElementById("inbox").value, "download_inbox");

			document.getElementById("piano").checked = false;
			document.getElementById("strings").checked = false;
			document.getElementById("winds").checked = false;
			document.getElementById("drums").checked = false;
			document.getElementById("harp").checked = false;
			document.getElementById("guitar").checked = false;
			document.getElementById("bass").checked = false;
			
			for (var i=0; i<response.completions[0].tracks.length; i++) {
				document.getElementById(inst_to_instgroup[response.completions[0].tracks[i].instrument]).checked = true;
			}
			
			stopLoading();
		}).catch(error => {
			stopLoading();
			alert(error);
		});
	}
}

var ding = new Audio('chord.wav');
ding.volume = 0.1;
window.isLoading = false;

function startLoading() {
	document.getElementById("button").disabled = true;
	window.isLoading = true;
	document.getElementById("loader-inner").style.animation = "progress 60s linear both";
}
function stopLoading() {
	ding.play();
	document.getElementById("button").disabled = false;
	window.isLoading = false;
	document.getElementById("loader-inner").style.animation = "none";
}

window.extend = function() {
	startLoading();
	var genreList = ["chopin","mozart","rachmaninoff","ladygaga","country","disney","jazz","bach","beethoven","journey","thebeatles","video","broadway","franksinatra","bluegrass","tchaikovsky","liszt","everything","ragtime","andrehazes","cocciante","thecranberries","ligabue","metallica","traffic","philcollins","nineinchnails","thepretenders","sugarray","grandfunkrailroad","ron","ellington","fleetwoodmac","thebeachboys","kool & the gang","foreigner","tlc","scottjames","benfoldsfive","smashmouth","oasis","allsaints","donnasummer","weezer","bjork","mariahcarey","berte","cheaptrick","caroleking","thecars","gganderson","robertpalmer","zucchero","alicecooper","vanhalen","brucehornsby","coolio","jimmybuffett","lobo","badcompany","eminem","creedenceclearwaterrevival","deeppurple","shearinggeorge","robbiewilliams","dalla","ub40","lindaronstadt","sinatra","inxs","jonimitchell","michaeljackson","last","devo","shaniatwain","korn","brooksgarth","sweet","thewho","roxette","bowiedavid","beegees","renefroger","mina","estefangloria","mccartney","theventures","carboni","simplyred","santana","jewel","meatloaf","giorgia","nofx","rickymartin","thecure","thetemptations","tozzi","beck","eiffel65","jenniferlopez","reelbigfish","patsycline","richardcliff","styx","acdc","brucespringsteen","michaelgeorge","blondie","pinkfloyd","oldfieldmike","redhotchilipeppers","therollingstones","morandi","heart","robertaflack","pantera","alabama","jethrotull","hanson","mosch","ludwigvanbeethoven","dvorak","chrisrea","guns n' roses","duranduran","ericclapton","bettemidler","bwitched","gordonlightfoot","thegrassroots","chicago","whitezombie","michaelbolton","paulsimon","marillion","thepointersisters","theanimals","cher","haydn","aerosmith","supertramp","littleriverband","america","tonyorlando","tompetty","thecorrs","aliceinchains","kiss","prince","toto","vanmorrison","wagner","cashjohnny","annielennox","enya","thedoobiebrothers","thetragicallyhip","rush","laurapausini","stevemillerband","simonandgarfunkel","fiorellamannoia","olivianewton-john","carlysimon","elvispresley","vangelis","bobdylan","bbking","vengaboys","paoli","thehollies","alainsouchon","pooh","raf","fiorello","lionelrichie","jimihendrix","theeverlybrothers","limpbizkit","donhenley","georgeharrison","threedognight","johnmellencamp","carpenters","raycharles","basie","billyocean","scorpions","royorbison","whitneyhouston","ironmaiden","jovanotti","alanjackson","barrymanilow","hueylewis","kennyloggins","chopinfrederic","talkingheads","themonkees","rem","jeanmicheljarre","michelezarrillo","eurythmics","thedoors","guesswho","miller","thefourseasons","matiabazar","tompettyandtheheartbreakers","chickcorea","scottjoplin","amedeominghi","bryanadams","paulaabdul","rossivasco","billyjoel","daniele","claudedebussy","gilbert & sullivan","chakakhan","nirvana","garbage","andreabocelli","johnnyrivers","emerson, lake & palmer","theallmanbrothersband","zappa","boston","mango","barbrastreisand","willsmith","ozzyosbourne","janetjackson","antonellovenditti","u2","humperdinckengelbert","jamiroquai","zero","chuckberry","spicegirls","ledzeppelin","masini","thekinks","eagles","billyidol","alanismorissette","joecocker","jimcroce","bobmarley","blacksabbath","stonetemplepilots","silverchair","paulmccartney","blur","nek","greenday","thepolice","depechemode","rageagainstthemachine","madonna","rogerskenny","brooks & dunn","883","thedrifters","amygrant","herman","toriamos","eltonjohn","britneyspears","lennykravitz","celentano","ringostarr","neildiamond","aqua","oscarpeterson","joejackson","moby","collinsphil","leosayer","takethat","electriclightorchestra","pearljam","marcanthony","borodin","petshopboys","stevienicks","hollybuddy","turnertina","annaoxa","zztop","sting","themoodyblues","ruggeri","creed","claudebolling","renzoarbore","erasure","elviscostello","airsupply","tinaturner","leali","petergabriel","nodoubt","bread","huey lewis & the news","brandy","level42","radiohead","georgebenson","wonderstevie","thesmashingpumpkins","cyndilauper","rodstewart","bush","ramazzotti","bobseger","theshadows","gershwin","cream","biagioantonacci","steviewonder","nomadi","direstraits","davidbowie","amostori","thealanparsonsproject","johnlennon","crosbystillsnashandyoung","battiato","kansas","clementi","richielionel","yes","brassensgeorges","steelydan","jacksonmichael","buddyholly","earthwindandfire","natkingcole","therascals","bonjovi","alanparsons","backstreetboys","glencampbell","howardcarpendale","thesupremes","villagepeople","blink-182","jacksonbrowne","sade","lynyrdskynyrd","foofighters","2unlimited","battisti","hall & oates","stansfieldlisa","genesis","boyzone","theoffspring","tomjones","davematthewsband","johnelton","neilyoung","dionnewarwick","aceofbase","marilynmanson","taylorjames","rkelly","grandi","sublime","edvardgrieg","tool","bachjohannsebastian","patbenatar","celinedion","queen","soundgarden","abba","drdre","defleppard","dominofats","realmccoy","natalieimbruglia","hole","spinners","arethafranklin","reospeedwagon","indian","movie","scottish","irish","african","taylorswift","shakira","blues","latin","katyperry","world","kpop","africandrum","michaelbuble","rihanna","gospel","beyonce","chinese","arabic","adele","kellyclarkson","theeagles","handel","rachmaninov","schumann","christmas","dance","punk","natl_anthem","brahms","rap","ravel","burgmueller","other","schubert","granados","albeniz","mendelssohn","debussy","grieg","moszkowski","godowsky","folk","mussorgsky","kids","balakirev","hymns","verdi","hummel","deleted","delibes","saint-saens","puccini","satie","offenbach","widor","songs","stravinsky","vivaldi","gurlitt","alkan","weber","strauss","traditional","rossini","mahler","soler","sousa","telemann","busoni","scarlatti","stamitz","classical","jstrauss2","gabrieli","nielsen","purcell","donizetti","kuhlau","gounod","gibbons","weiss","faure","holst","spohr","monteverdi","reger","bizet","elgar","czerny","sullivan","shostakovich","franck","rubinstein","albrechtsberger","paganini","diabelli","gottschalk","wieniawski","lully","morley","sibelius","scriabin","heller","thalberg","dowland","carulli","pachelbel","sor","marcello","ketterer","rimsky-korsakov","ascher","bruckner","janequin","anonymous","kreutzer","sanz","joplin","susato","giuliani","lassus","palestrina","smetana","berlioz","couperin","gomolka","daquin","herz","campion","walthew","pergolesi","reicha","polak","holborne","hassler","corelli","cato","azzaiolo","anerio","gastoldi","goudimel","dussek","prez","cimarosa","byrd","praetorius","rameau","khachaturian","machaut","gade","perosi","gorzanis","smith","haberbier","carr","marais","glazunov","guerrero","cabanilles","losy","roman","hasse","sammartini","blow","zipoli","duvernoy","aguado","cherubini","victoria","field","andersen","poulenc","d'aragona","lemire","krakowa","maier","rimini","encina","banchieri","best","galilei","warhorse","gypsy","soundtrack","encore","roblaidlow","nationalanthems","benjyshelton","ongcmu","crosbystillsnashyoung","smashingpumpkins","aaaaaaaaaaa","alanismorrisette","animenz","onedirection","nintendo","disneythemes","gunsnroses","rollingstones","juliancasablancas","abdelmoinealfa","berckmansdeoliveira","moviethemes","beachboys","davemathews","videogamethemes","moabberckmansdeoliveira","unknown","cameronleesimpson","johannsebastianbach","thecarpenters","elo","nightwish","blink182","emersonlakeandpalmer","tvthemes"];
	var genre = document.getElementById("genre").value;
	if (genre == "<random>") {
		genre = genreList[Math.floor(Math.random()*genreList.length)];
	}
	fetch("https://musenet.openai.com/sample", {
		"method": "POST",
		"headers": {
			"Content-Type": "application/json"
		},
		"body": JSON.stringify({
			"genre": genre,
			"instrument":{
				"piano": document.getElementById("piano").checked,
				"strings": document.getElementById("strings").checked,
				"winds": document.getElementById("winds").checked,
				"drums": document.getElementById("drums").checked,
				"harp": document.getElementById("harp").checked,
				"guitar": document.getElementById("guitar").checked,
				"bass": document.getElementById("bass").checked
			},
			"encoding":document.getElementById("inbox").value,
			"temperature":parseFloat(document.getElementById("temperature").value),
			"truncation":parseFloat(document.getElementById("truncation").value),
			"generationLength":parseFloat(document.getElementById("generationLength").value),
			"audioFormat": document.getElementById("format").value
		})
	}).then(res => res.json()).then(function (response) {
		var seekTo = window.oldDuration - 5;
		if (isNaN(seekTo) || !isFinite(seekTo) || seekTo < 0) {
			seekTo = 0;
		}
		//need to convert from dataURI to blob to avoid firefox issue
		var format = "audio/mp3";
		var audioKey = "audioFile";
		if (response.completions[0].oggFile) {
			format = "audio/ogg";
			audioKey = "oggFile";
		}
		document.getElementById('sound1').src=URL.createObjectURL(new Blob([convertDataURIToBinary("data:"+format+";base64,"+response.completions[0][audioKey].substring(2,response.completions[0][audioKey].length-1))], {type : format}));
		document.getElementById('sound2').src=URL.createObjectURL(new Blob([convertDataURIToBinary("data:"+format+";base64,"+response.completions[1][audioKey].substring(2,response.completions[1][audioKey].length-1))], {type : format}));
		document.getElementById('sound3').src=URL.createObjectURL(new Blob([convertDataURIToBinary("data:"+format+";base64,"+response.completions[2][audioKey].substring(2,response.completions[2][audioKey].length-1))], {type : format}));
		document.getElementById('sound4').src=URL.createObjectURL(new Blob([convertDataURIToBinary("data:"+format+";base64,"+response.completions[3][audioKey].substring(2,response.completions[3][audioKey].length-1))], {type : format}));
		document.getElementById("outbox1").value = response.completions[0].encoding;
		document.getElementById("outbox2").value = response.completions[1].encoding;
		document.getElementById("outbox3").value = response.completions[2].encoding;
		document.getElementById("outbox4").value = response.completions[3].encoding;
		window.encodingToMidiFile(response.completions[0].encoding, "download_outbox1");
		window.encodingToMidiFile(response.completions[1].encoding, "download_outbox2");
		window.encodingToMidiFile(response.completions[2].encoding, "download_outbox3");
		window.encodingToMidiFile(response.completions[3].encoding, "download_outbox4");
		document.getElementById('sound1').currentTime = seekTo;
		document.getElementById('sound2').currentTime = seekTo;
		document.getElementById('sound3').currentTime = seekTo;
		document.getElementById('sound4').currentTime = seekTo;
		stopLoading();
	}).catch(error => {
		stopLoading();
		alert(error);
	});
}

function convertDataURIToBinary(dataURI) {
	var BASE64_MARKER = ';base64,';
	var base64Index = dataURI.indexOf(BASE64_MARKER) + BASE64_MARKER.length;
	var base64 = dataURI.substring(base64Index);
	var raw = window.atob(base64);
	var rawLength = raw.length;
	var array = new Uint8Array(new ArrayBuffer(rawLength));

	for(i = 0; i < rawLength; i++) {
		array[i] = raw.charCodeAt(i);
	}
	return array;
}

window.encodingToMidiFile = function(encoding, outlink) {
	var midiData = {
	    header: {
	    	"format": 1,
	    	"numTracks": 10,
	    	"ticksPerBeat": 48
	    },
	    tracks: [[{"deltaTime":0,"channel":0,"type":"programChange","programNumber":0}],
	             [{"deltaTime":0,"channel":1,"type":"programChange","programNumber":40}],
	             [{"deltaTime":0,"channel":2,"type":"programChange","programNumber":42}],
	             [{"deltaTime":0,"channel":3,"type":"programChange","programNumber":32}],
	             [{"deltaTime":0,"channel":4,"type":"programChange","programNumber":24}],
	             [{"deltaTime":0,"channel":5,"type":"programChange","programNumber":73}],
	             [{"deltaTime":0,"channel":6,"type":"programChange","programNumber":71}],
	             [{"deltaTime":0,"channel":7,"type":"programChange","programNumber":56}],
	             [{"deltaTime":0,"channel":8,"type":"programChange","programNumber":46}],
	             [{"deltaTime":0,"channel":9,"type":"programChange","programNumber":0}]]
	};

	var tokens = [];
	if (encoding.trim()) {
		tokens = encoding.trim().split(" ");
	}

	var deltaTimes = [0,0,0,0,0,0,0,0,0,0];
	var totalDelay = 0;
	var usedDrumNotes = new Set();
	for (var i=0; i<tokens.length; i++) {
		var token = tokens[i];
		var parsedToken = parseToken(token);
		if (parsedToken.type == "note") {
			var trackIndex = inst_to_track[parsedToken.instrument];
			midiData.tracks[trackIndex].push({
				"deltaTime": deltaTimes[trackIndex],
				"channel": trackIndex,
				"type": parsedToken.volume > 0 ? "noteOn" : "noteOff",
				"noteNumber": parsedToken.pitch,
				"velocity": parsedToken.volume
			});
			if (parsedToken.instrument == "drum") {
				usedDrumNotes.add(parsedToken.pitch);
			}
			deltaTimes[trackIndex] = 0;
		} else if (parsedToken.type == "wait") {
			for (var j=0; j<10; j++) {
				deltaTimes[j] += parsedToken.delay;
			}
			totalDelay += parsedToken.delay;
			for (let pitch of usedDrumNotes) {
				midiData.tracks[9].push({
					"deltaTime": deltaTimes[9],
					"channel": 9,
					"type": "noteOff",
					"noteNumber": pitch,
					"velocity": 0
				});
				deltaTimes[9] = 0;
			}
			usedDrumNotes = new Set();
		}
	}
	for (let pitch of usedDrumNotes) {
		midiData.tracks[9].push({
			"deltaTime": deltaTimes[9],
			"channel": 9,
			"type": "noteOff",
			"noteNumber": pitch,
			"velocity": 0
		});
		deltaTimes[9] = 0;
	}

	for (var i=0; i<midiData.tracks.length; i++) {
		midiData.tracks[i].push({
			"deltaTime": deltaTimes[i],
			"meta": true,
			"type": "endOfTrack"
		});
		deltaTimes[i] = 0;
	}

	var filteredMidiTracks = midiData.tracks.filter(track => track.length > 2);
	if (filteredMidiTracks.length > 0) {
		midiData.tracks = filteredMidiTracks;
	}
	
	midiData.tracks[0].unshift({
		"deltaTime": 0,
		"meta": true,
		"type": "setTempo",
		"microsecondsPerBeat": 480000
	});

	console.log(midiData);

	var midiBlob = new Blob([new Uint8Array(writeMidi(midiData))], {type: "audio/midi"});
	var objectUrl = URL.createObjectURL(midiBlob);
	document.getElementById(outlink).href = objectUrl;
	document.getElementById(outlink).target = "_blank";
	document.getElementById(outlink).download = new Date().toISOString().replace("T","-").replaceAll(":","-").replace(/\..+/,"")+".mid";
	if (outlink == "download_inbox") {
		window.oldDuration = totalDelay / 100;
		console.log(window.oldDuration);
	}
}
window.encodingToMidiFile(document.getElementById("inbox").value, "download_inbox");
window.encodingToMidiFile(document.getElementById("outbox1").value, "download_outbox1");
window.encodingToMidiFile(document.getElementById("outbox2").value, "download_outbox2");
window.encodingToMidiFile(document.getElementById("outbox3").value, "download_outbox3");
window.encodingToMidiFile(document.getElementById("outbox4").value, "download_outbox4");

function parseToken(token) {
	token = +token;
	if (token >= 0 && token < 3840) {
		var pitch = token % 128;
		var inst_vol_index = token >> 7;
		var instrument = ["piano","piano","piano","piano","piano","piano","piano","piano","piano","piano","piano","piano","piano","piano",
		                  "violin","violin","cello","cello","bass","bass","guitar","guitar",
		                  "flute","flute","clarinet","clarinet","trumpet","trumpet","harp","harp"][inst_vol_index];
		var volume = [0,24,32,40,48,56,64,72,80,88,96,104,112,120,80,0,80,0,80,0,80,0,80,0,80,0,80,0,80,0][inst_vol_index];
		return {"type":"note","pitch":pitch,"instrument":instrument,"volume":volume};
	} else if (token >= 3840 && token < 3968) {
		var pitch = token % 128;
		return {"type":"note","pitch":pitch,"instrument":"drum","volume":80};
	} else if (token >= 3968 && token < 4096) {
		var delay = (token % 128) + 1;
		return {"type":"wait","delay":delay}
	} else if (token == 4096) {
		return {"type":"start"}
	} else {
		return {"type":"invalid"}
	}

}