NowYouSeeMe/webrtc.html at master · velour/NowYouSeeMe · GitHub

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<html>
<head>
	<script src="https://cdnjs.cloudflare.com/ajax/libs/peerjs/0.3.16/peer.min.js"></script>
</head>
<body>
<div>
	My Peer-ID: <input type="text" id="myPeerId" disabled value=""> Connection Peer-ID: <input type="text" id="peerId" value=""> Nick: <input type="text" id="nick" value=""><button id="connect">connect</button>
</div>
<div>
	<textarea id="chat" rows="8" cols="80"></textarea>
</div>
<div>
	<input type="text" id="message" value=""><button id="send">send</button>
</div>
<div>
	Share Video: <input type="checkbox" id="shareVideo" checked/> Share Audio: <input type="checkbox" id="shareAudio" checked/>
</div>
<div id="videos">
	<video id="localVideo" width="150" height="150" muted></video>
</div>


<script>
window.setInterval(function() {
	var closed = [];
	for(var peerId in connections) {
		if(!connections[peerId].data.open && connections[peerId].status != "connecting") {
			closed.push(peerId);
		}
	}

	for(var peerId in closed) {
		var video = document.getElementById("video-" + closed[peerId]);
		if(video) {
			video.parentNode.removeChild(video);
		}

		document.getElementById("chat").value += connections[closed[peerId]].nick + " disconnected\n";

		delete connections[closed[peerId]];
	}
}, 1000);

var localStreams = null;
navigator.mediaDevices.getUserMedia({ audio: true, video: {width: 100, height: 100} }).then((stream) => {
	localStreams = stream;
	var localVideoElement = document.getElementById("localVideo");
	localVideoElement.mute = true;
	localVideoElement.srcObject = localStreams;
	localVideoElement.play();
});

document.getElementById('shareVideo').addEventListener('change', (event) => {
	localStreams.getVideoTracks()[0].enabled = event.target.checked;
});

document.getElementById('shareAudio').addEventListener('change', (event) => {
	localStreams.getAudioTracks()[0].enabled = event.target.checked;
})

var peer = new Peer({key: 'lwjd5qra8257b9'});

var connections = {};

var myPeerId = null;
var myNick = null;

peer.on('open', (id) => {
	myPeerId = id;
	document.getElementById("myPeerId").value = myPeerId;
});

function connectToPeer(peerId, doCall) {
	if(connections[peerId] || peerId == myPeerId) {
		if(doCall) {
			connections[peerId].call = peer.call(peerId, localStreams);
			connections[peerId].call.on('stream', handleStreamReceived.bind(peerId));
			connections[peerId].data.on('error', (err) => { console.log(err); });
		}
		return;
	}

	connections[peerId] = {
		status : "connecting",
		data : peer.connect(peerId),
		call : null,
		nick : "",
	};

	connections[peerId].data.on('error', function(err) { console.log(err); connections[this].status = "failed"; }.bind(peerId));
	connections[peerId].data.on('open', function() {
		var peerId = this.peer;
		var peers = "PEERS:";
		for(var peerId in connections) {
			if(peerId != myPeerId) {
				peers += " " + peerId;
			}
		}

		connections[this].status = "connected";
		connections[this].data.send("NICK: " + myPeerId + " " + myNick);
		connections[this].data.send(peers);

		if(doCall) {
			connections[this].call = peer.call(peerId, localStreams);
			connections[this].call.on('stream', handleStreamReceived.bind(peerId));
			connections[this].data.on('error', (err) => { console.log(err); });
		}
	}.bind(peerId));
}

function handleStreamReceived(remoteStream) {
	console.log("got stream");
		var video = document.createElement('video');
		video.id = "video-" + this;
		video.width = 150;
		video.height = 150;
		video.srcObject = remoteStream;
		video.play();
		document.getElementById("videos").appendChild(video);
}

function disableConnectionControls() {
	document.getElementById("connect").disabled = true;
	document.getElementById("peerId").disabled = true;
	document.getElementById("nick").disabled = true;
	myNick = document.getElementById("nick").value;
}

function handleDataReceived(data) {
	if(data.startsWith("NICK:")) {
		var nick = data.split(" ");
		if(connections[nick[1]].nick == "") {
			connections[nick[1]].nick = nick[2];
			document.getElementById("chat").value += "Connected to " + nick[2] + "\n";
		}
	} else if(data.startsWith("PEERS:")) {
		var peers = data.split(" ");
		for(var i = 1; i < peers.length; i++) {
			var peerId = peers[i];
			connectToPeer(peerId, true);
		}
	} else {
		document.getElementById("chat").value += data + "\n";
	}
}

function handleCall(call) {
	var peerId = call.peer;
	if(!connections[peerId].call) {
		call.answer(localStreams);
		connections[peerId].call = call;
		connections[peerId].call.on('stream', handleStreamReceived.bind(peerId));
	}
}

document.getElementById("connect").addEventListener("click", () => {
	disableConnectionControls();
	connectToPeer(document.getElementById("peerId").value, true);
});

peer.on('call', handleCall);
peer.on('connection', function(conn) {
	disableConnectionControls();
	connectToPeer(conn.peer, false);
	conn.on('data', handleDataReceived);
});

document.getElementById("send").addEventListener("click", () => {
	var messageElement = document.getElementById("message");
	var message = myNick + ": " + messageElement.value;

	document.getElementById("chat").value += message + "\n";

	messageElement.value = null;
	for(var peerId in connections) {
		if(peerId != myPeerId) {
				connections[peerId].data.send(message);
		}
	}
});
</script>
</body>
</html>