Text-to-Audio Conversion Function Review

It is necessary to perform a code review of the text_to_voice function, which receives text from the request body, sends it to the external InferKit API, then uses Amazon Polly to synthesize speech, saves the resulting audio file in S3, and returns the prescribed file link.

@swagger_auto_schema(method='post', request_body=RequestSerializer, responses={200: USER_RESPONSE, 400: BAD_RESPONSE})
@api_view(["POST"])
def text_to_voice(request):
    text = request.data.get("text")
    payload = {"length": 500}

    if text:
        payload["prompt"] = {"text": text}
        headers = {"Authorization": f"Bearer {settings.INFERKIT_API_KEY}"}
        response = requests.post(settings.INFERKIT_URL, headers=headers, json=payload)

        if response.status_code == 400 and "Out of generation credits" in response.text:
            return views.Response({"error_message": "Out of generation credits"}, status=400)

        if not response.ok:
            logger.error(f"Status code {response.status_code} from inferkit with {response.text}.")
            raise views.exceptions.ParseError("Text generation API failed. Please, try again.")

        response_text = response.json().get("data", {}).get("text") if response.ok else ""

        aws_kwargs = {
            "aws_access_key_id": settings.AWS_ACCESS_KEY_ID,
            "aws_secret_access_key": settings.AWS_SECRET_ACCESS_KEY
        }

        polly_client = boto3.Session(region_name=settings.AWS_REGION_NAME, **aws_kwargs).client("polly")
        generated_audio = polly_client.synthesize_speech(Text=response_text, OutputFormat=settings.AWS_FILE_TYPE, VoiceId="Joey", LanguageCode="en-US")

        s3_connection = boto3.resource("s3", **aws_kwargs)
        file_name = f"{datetime.now().isoformat()}.{settings.AWS_FILE_TYPE}"
        s3_connection.Bucket(settings.AWS_BUCKET_NAME).put_object(
            Key=file_name,
            Body=generated_audio.get("AudioStream").read(),
            ContentType=settings.AWS_FILE_TYPE
        )

        file_url = s3_connection.meta.client.generate_presigned_url(
            ClientMethod="get_object",
            Params={"Bucket": settings.AWS_BUCKET_NAME, "Key": file_name}
        )

        return views.Response({"message": response_text, "file_url": file_url})