main.js

async function tts(text, _lang, options = {}) {
  const { config, utils } = options;
  const { http } = utils;
  const { fetch, Body } = http;

  let { requestPath, apiKey, model, voice, speed } = config;

  if (!requestPath) {
    requestPath = "https://api.openai.com";
  }
  if (!/https?:\/\/.+/.test(requestPath)) {
    requestPath = `https://${requestPath}`;
  }
  if (requestPath.endsWith("/")) {
    requestPath = requestPath.slice(0, -1);
  }
  if (!requestPath.endsWith("/audio/speech")) {
    requestPath += "/v1/audio/speech";
  }
  if (!apiKey) {
    throw "apiKey is required";
  }
  if (!model) {
    model = "tts-1";
  }
  if (!voice) {
    voice = "alloy";
  }
  if (!speed) {
    speed = 1.0;
  }
  const safeText = text.trim().normalize("NFKC");
  const res = await fetch(requestPath, {
    method: "POST",
    headers: {
      "Content-Type": "application/json; charset=utf-8",
      Authorization: `Bearer ${apiKey}`,
    },
    body: Body.json({
      model,
      voice,
      speed: parseFloat(speed),
      input: safeText,
    }),
    responseType: 3,
  });

  if (res.ok) {
    let result = res.data;
    if (result) {
      return result;
    } else {
      throw JSON.stringify(result);
    }
  } else {
    throw `Http Request Error\nHttp Status: ${res.status}\n${JSON.stringify(
      res.data
    )}`;
  }
}