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client.js
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client.js
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const captions = window.document.getElementById("captions");
async function getMicrophone() {
const userMedia = await navigator.mediaDevices.getUserMedia({
audio: true,
});
return new MediaRecorder(userMedia);
}
async function openMicrophone(microphone, socket) {
await microphone.start(500);
microphone.onstart = () => {
console.log("client: microphone opened");
document.body.classList.add("recording");
};
microphone.onstop = () => {
console.log("client: microphone closed");
document.body.classList.remove("recording");
};
microphone.ondataavailable = (e) => {
console.log("client: sent data to websocket");
socket.emit("packet-sent", e.data);
};
}
async function closeMicrophone(microphone) {
microphone.stop();
}
async function start(socket) {
const listenButton = document.getElementById("record");
let microphone;
console.log("client: waiting to open microphone");
listenButton.addEventListener("click", async () => {
if (!microphone) {
// open and close the microphone
microphone = await getMicrophone();
await openMicrophone(microphone, socket);
} else {
await closeMicrophone(microphone);
microphone = undefined;
}
});
}
window.addEventListener("load", () => {
const socket = io((options = { transports: ["websocket"] }));
socket.on("connect", async () => {
console.log("client: connected to websocket");
await start(socket);
});
socket.on("transcript", (transcript) => {
if (transcript !== "")
captions.innerHTML = transcript ? `<span>${transcript}</span>` : "";
});
});