useMakeCall() hook

app/phone-calls/hooks/use-make-call.ts

@@ -0,0 +1,119 @@
+import { useEffect, useState } from "react";
+import { useMutation } from "blitz";
+import { Call, Device, TwilioError } from "@twilio/voice-sdk";
+
+import getToken from "../mutations/get-token";
+
+export default function useMakeCall(recipient: string) {
+	const [outgoingConnection, setOutgoingConnection] = useState<Call | null>(null);
+	const [device, setDevice] = useState<Device | null>(null);
+	const [getTokenMutation] = useMutation(getToken);
+	const [state, setState] = useState<State>("initial");
+
+	useEffect(() => {
+		(async () => {
+			const token = await getTokenMutation();
+			const device = new Device(token, {
+				codecPreferences: [Call.Codec.Opus, Call.Codec.PCMU],
+				sounds: {
+					[Device.SoundName.Disconnect]: undefined, // TODO
+				},
+			});
+			device.register();
+			setDevice(device);
+		})();
+	}, [getTokenMutation]);
+
+	useEffect(() => {
+		if (!device) {
+			return;
+		}
+
+		device.on("error", onDeviceError);
+		device.on("registered", onDeviceRegistered);
+		device.on("incoming", onDeviceIncoming);
+
+		return () => {
+			device.off("error", onDeviceError);
+			device.off("registered", onDeviceRegistered);
+			device.off("incoming", onDeviceIncoming);
+		};
+	}, [device]);
+
+	return {
+		makeCall,
+		sendDigits,
+		hangUp,
+		state,
+	};
+
+	async function makeCall() {
+		if (!device) {
+			console.error("no device initialized, can't make the call");
+			return;
+		}
+
+		if (state !== "ready") {
+			console.error("not a good time", state);
+			return;
+		}
+
+		setState("calling");
+
+		const params = { To: recipient };
+		const outgoingConnection = await device.connect({ params });
+		setOutgoingConnection(outgoingConnection);
+		// @ts-ignore
+		window.ddd = outgoingConnection;
+
+		outgoingConnection.on("cancel", () => setState("call_ended"));
+		outgoingConnection.on("disconnect", () => setState("call_ending"));
+		outgoingConnection.on("error", (error) => {
+			console.error("call error", error);
+			alert(error);
+		});
+	}
+
+	function sendDigits(digits: string) {
+		return outgoingConnection?.sendDigits(digits);
+	}
+
+	function hangUp() {
+		setState("call_ending");
+
+		if (outgoingConnection) {
+			outgoingConnection.reject();
+		}
+
+		if (device) {
+			device.disconnectAll();
+			// device.destroy();
+		}
+	}
+
+	function onDeviceError(error: TwilioError.TwilioError, call?: Call) {
+		console.error("device error", error);
+		alert(error);
+	}
+
+	function onDeviceRegistered() {
+		setState("ready");
+	}
+
+	function onDeviceIncoming(call: Call) {
+		// TODO
+		console.log("call", call);
+		console.log("Incoming connection from " + call.parameters.From);
+		let archEnemyPhoneNumber = "+12093373517";
+
+		if (call.parameters.From === archEnemyPhoneNumber) {
+			call.reject();
+			console.log("It's your nemesis. Rejected call.");
+		} else {
+			// accept the incoming connection and start two-way audio
+			call.accept();
+		}
+	}
+}
+
+type State = "initial" | "ready" | "calling" | "call_in_progress" | "call_ending" | "call_ended";