react-native-gtts-lite/index.js

🎙️ Lightweight Google Translate TTS for React Native CLI using react-native-fs and react-native-sound.

// index.js
const axios = require('axios');
const RNFS = require('react-native-fs');
const Sound = require('react-native-sound');
const { Buffer } = require('buffer');

global.Buffer = global.Buffer || Buffer;

/**
 * Speaks the given text using Google Translate TTS.
 * @param {string} text - Text to speak.
 * @param {string} lang - Language code (default is 'en').
 * @returns {Promise<void>}
 */
const speak = async (text = 'Hello!', lang = 'en') => {
  try {
    const encodedText = encodeURIComponent(text);
    const ttsUrl = `https://translate.google.com/translate_tts?ie=UTF-8&client=tw-ob&tl=${lang}&q=${encodedText}`;
    const filePath = `${RNFS.DocumentDirectoryPath}/tts.mp3`;

    const response = await axios({
      url: ttsUrl,
      method: 'GET',
      responseType: 'arraybuffer',
      headers: {
        'Content-Type': 'audio/mpeg',
      },
    });

    const base64Data = Buffer.from(response.data, 'binary').toString('base64');
    await RNFS.writeFile(filePath, base64Data, 'base64');

    return new Promise((resolve, reject) => {
      const sound = new Sound(filePath, '', error => {
        if (error) return reject(error);
        sound.play(success => {
          if (!success) return reject(new Error('Playback failed'));
          sound.release();
          resolve();
        });
      });
    });
  } catch (err) {
    console.error('TTS Error:', err.message);
    throw err;
  }
};

module.exports = {
  speak,
};