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import { useState, useEffect, useCallback } from "react";
import { useQueue } from "@uidotdev/usehooks";
import { LiveClient, LiveTranscriptionEvents, createClient } from "@deepgram/sdk";
export function useLiveTranscript() {
const { add, remove, first, size, queue } = useQueue<any>([]);
const [apiKey, _] = useState<string | null>("");
const [connection, setConnection] = useState<LiveClient | null>(null);
const [isListening, setIsListening] = useState(false);
const [isLoading, setIsLoading] = useState(true);
const [isProcessing, setIsProcessing] = useState(false);
const [micOpen, setMicOpen] = useState(false);
const [microphone, setMicrophone] = useState<MediaRecorder | null>(null);
const [userMedia, setUserMedia] = useState<MediaStream | null>(null);
const [caption, setCaption] = useState<string>("");
const [status, setStatus] = useState<string>("Not Connected");
// Initialize Deepgram connection
const initializeConnection = useCallback(() => {
if (!apiKey) return null;
const deepgram = createClient(apiKey);
const connection = deepgram.listen.live({
model: "nova-3",
language: "en",
smart_format: true,
interim_results: true,
punctuate: true,
diarize: true,
utterances: true,
});
connection.on(LiveTranscriptionEvents.Open, () => {
setStatus("Connected");
setIsListening(true);
});
connection.on(LiveTranscriptionEvents.Close, () => {
setStatus("Not Connected");
setIsListening(false);
});
connection.on(LiveTranscriptionEvents.Error, (error) => {
console.error("Deepgram error:", error);
setStatus("Error occurred");
});
connection.on(LiveTranscriptionEvents.Transcript, (data) => {
const transcript = data.channel.alternatives[0].transcript;
if (data.is_final) {
if (transcript && transcript.trim() !== "") {
setCaption((prev) => prev + " " + transcript);
}
}
});
return connection;
}, [apiKey]);
const toggleMicrophone = useCallback(async () => {
if (microphone && userMedia) {
setUserMedia(null);
setMicrophone(null);
microphone.stop();
if (connection) {
connection.finish();
setConnection(null);
}
} else {
const userMedia = await navigator.mediaDevices.getUserMedia({
audio: true,
});
const microphone = new MediaRecorder(userMedia);
microphone.start(250);
microphone.onstart = () => {
setMicOpen(true);
// Create new connection when starting microphone
const newConnection = initializeConnection();
if (newConnection) {
setConnection(newConnection);
}
};
microphone.onstop = () => {
setMicOpen(false);
};
microphone.ondataavailable = (e) => {
add(e.data);
};
setUserMedia(userMedia);
setMicrophone(microphone);
}
}, [add, microphone, userMedia, connection, initializeConnection]);
useEffect(() => {
setIsLoading(false);
}, []);
useEffect(() => {
const processQueue = async () => {
if (size > 0 && !isProcessing && isListening && connection) {
setIsProcessing(true);
try {
const blob = first;
if (blob) {
connection.send(blob);
}
remove();
} catch (error) {
console.error("Error processing audio:", error);
}
setIsProcessing(false);
}
};
const interval = setInterval(processQueue, 100);
return () => clearInterval(interval);
}, [connection, queue, remove, first, size, isProcessing, isListening]);
return {
toggleMicrophone,
caption,
status,
isListening,
isLoading,
};
}
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