echo-e2e
Version:
**Testing phone calls is hard. Testing AI-powered phone calls is even harder.**
65 lines • 2.74 kB
JavaScript
import { WebSocketServer } from "ws";
import { initializeDeepgram } from "../deepgram/stt.js";
export class WebsocketServer {
constructor(server) {
this.websocketServer = new WebSocketServer({ server, path: '/ws' });
this.ws = null;
this.messageListener = [];
}
send(message) {
if (this.ws) {
this.ws.send(JSON.stringify(Object.assign(Object.assign({}, message), { streamSid: this.streamSid })));
}
}
registerListener(listener) {
this.messageListener.push(listener);
}
async listen() {
this.deepgramClient = await initializeDeepgram();
this.websocketServer.on("connection", async (ws, request) => {
this.ws = ws;
ws.on("message", async (data) => {
const websocketMessage = JSON.parse(data);
// Call registered listeners
for (const listener of this.messageListener) {
listener(websocketMessage);
}
/**
* Twilio Start Procedure
*/
if (websocketMessage.event === "start") {
this.streamSid = websocketMessage.start.streamSid;
}
if (websocketMessage.event === "media" && this.deepgramClient) {
if (this.deepgramClient.getReadyState() === 1 /* OPEN */) {
if (websocketMessage.media.track === 'inbound') {
const media = websocketMessage.media;
const audio = Buffer.from(media.payload, "base64");
// Send the audio to Deepgram for transcription
this.deepgramClient.send(audio);
}
}
else if (this.deepgramClient.getReadyState() >= 2 /* 2 = CLOSING, 3 = CLOSED */) {
console.log("ws: data couldn't be sent to deepgram");
console.log("ws: retrying connection to deepgram");
/* Attempt to reopen the Deepgram connection */
this.deepgramClient.finish();
this.deepgramClient.removeAllListeners();
this.deepgramClient = await initializeDeepgram();
}
else {
// console.log("ws: data couldn't be sent to deepgram");
}
}
});
ws.on("close", async () => {
});
ws.onerror = function () {
};
});
}
close() {
this.websocketServer.close();
}
}
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