feat: add Google TTS module

src/modules/tts-modes/google.ts

@@ -0,0 +1,47 @@
+import { TTSModule, TTSResponse } from '../tts';
+
+import * as https from 'https';
+
+import GOOGLE_TTS_VOICES from './google_voices.json';
+const GOOGLE_TTS_ENDPOINT = 'translate.google.com';
+const USER_AGENT =
+	'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.3';
+
+const ttsGoogle: TTSModule = {
+	name: 'Google',
+	getVoices: async (): Promise<string[]> => GOOGLE_TTS_VOICES.voices,
+
+	generate: async (voice: string, text: string): Promise<TTSResponse> => {
+		const query = new URLSearchParams({
+			ie: 'UTF-8',
+			q: text,
+			tl: voice,
+			client: 'tw-ob'
+		});
+
+		const options: https.RequestOptions = {
+			hostname: GOOGLE_TTS_ENDPOINT,
+			path: `/translate_tts?${query.toString()}`,
+			method: 'GET',
+			headers: {
+				'User-Agent': USER_AGENT
+			}
+		};
+
+		return new Promise((resolve) => {
+			const req = https.get(options, (res) => {
+				const chunks: Buffer[] = [];
+				res.on('data', (chunk) => chunks.push(chunk));
+				res.on('end', () => resolve({ data: Buffer.concat(chunks) }));
+			});
+
+			req.on('error', (err) => resolve({ error: err.message }));
+			req.on('timeout', () => {
+				req.destroy();
+				resolve({ error: 'timed out' });
+			});
+		});
+	}
+};
+
+export default ttsGoogle;