Add Twilio client wrapper and types

Add voice state manager

src/Wrappers/voice.ts

@@ -0,0 +1,53 @@
+import { Device, Connection } from "twilio-client";
+import useVoiceState, { VoiceState } from "../Hooks/voice-state";
+
+export interface Voice
+{
+	startDevice(token: string): void; 
+	answer(): void;
+	hangup(): void;
+	voiceState: VoiceState;
+}
+
+export default function useVoice() 
+{
+	const state = useVoiceState();
+	let device: Device;
+	let connection: Connection;
+
+	const startDevice = (token: string) =>
+	{
+		device = new Device(token);
+
+		device.on("ready", () => state.onDeviceStateUpdate("Disconnected"));
+		device.on("offline", () => state.onDeviceStateUpdate("Offline"));
+		device.on("disconnect", () => state.onDeviceStateUpdate("Disconnected"));
+		device.on("cancel", () => state.onDeviceStateUpdate("Disconnected"));
+
+		device.on("incoming", (incomingConnection: Connection) => 
+		{
+			state.onDeviceStateUpdate("Ringing", incomingConnection.parameters.From);
+			
+			incomingConnection.on("accept", () => state.onDeviceStateUpdate("Connected"));
+			incomingConnection.on("mute", muted => state.onDeviceStateUpdate(muted ? "Muted" : "Connected"));
+			connection = incomingConnection;
+		});
+	}
+
+	const answer = () =>
+	{
+		connection.accept();
+	}
+
+	const hangup = () =>
+	{
+		device.disconnectAll();
+	}
+
+	return {
+		startDevice,
+		answer,
+		hangup,
+		voiceState: state.voiceState,
+	}
+}