57 lines
2.6 KiB
JavaScript
57 lines
2.6 KiB
JavaScript
const express = require('express');
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const router = express.Router();
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const { authMiddleware } = require('../middleware/auth');
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var logger = require('../utils/logger');
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var { gatewayUrl } = require('../utils/errors');
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var { getTTSProvider } = require('../utils/ttsProvider');
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var { getLiteLLMHeaders } = require('../utils/litellm');
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// TTS is intentionally routed only through LiteLLM. Provider-specific voice
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// routing belongs in LiteLLM config, not this app.
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var ttsProvider = getTTSProvider();
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console.log('🔊 TTS provider:', ttsProvider);
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router.post('/text-to-speech', authMiddleware, async (req, res) => {
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try {
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var text = (req.body.text || '').substring(0, 5000);
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if (!text) return res.status(400).json({ error: 'No text provided' });
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// Get user's preferred TTS voice (if set), then fall back to DB admin default, then env
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var db = require('../db/database');
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var userPrefs = await db.get('SELECT tts_voice FROM users WHERE id = ?', [req.user.id]);
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var userVoice = userPrefs?.tts_voice;
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var adminVoice = await db.getSetting('tts.voice') || '';
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var adminModel = await db.getSetting('tts.model') || '';
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var resolvedVoice = userVoice || adminVoice || '';
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if (ttsProvider !== 'litellm' || !process.env.LITELLM_API_BASE) {
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return res.status(400).json({ error: 'TTS not configured. Set LITELLM_API_BASE.' });
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}
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var ttsModel = adminModel || process.env.LITELLM_TTS_MODEL || '';
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var ttsVoice = resolvedVoice || process.env.LITELLM_TTS_VOICE || '';
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if (!ttsModel) return res.status(400).json({ error: 'No LiteLLM TTS model configured.' });
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var ttsResp = await fetch(gatewayUrl('/audio/speech'), {
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method: 'POST',
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headers: getLiteLLMHeaders('application/json'),
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body: JSON.stringify({ model: ttsModel, input: text, voice: ttsVoice })
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});
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if (!ttsResp.ok) {
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var errBody = await ttsResp.text();
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throw new Error('LiteLLM /audio/speech ' + ttsResp.status + ': ' + errBody.substring(0, 500));
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}
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var audioBuf = Buffer.from(await ttsResp.arrayBuffer());
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res.set('Content-Type', ttsResp.headers.get('content-type') || 'audio/mpeg');
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res.set('X-TTS-Provider', 'litellm/' + ttsModel);
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logger.audit(req.user.id, 'text_to_speech', 'TTS generated', req, { category: 'clinical' });
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return res.send(audioBuf);
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} catch (err) {
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var detail = err.response && err.response.data
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? JSON.stringify(err.response.data).substring(0, 500)
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: err.message;
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console.error('[TTS] Error (' + ttsProvider + '):', detail);
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res.status(500).json({ error: 'TTS failed: ' + detail });
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}
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});
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module.exports = router;
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