Create realtime_session_manager.py

realtime_session_manager.py

@@ -0,0 +1,47 @@
+"""
+Helper functions for realtime session management
+"""
+import base64
+from typing import Optional
+from datetime import datetime
+import sys
+
+from logger import log_info, log_error, log_debug
+
+def log(message: str):
+    """Log helper with timestamp"""
+    timestamp = datetime.now().strftime("%H:%M:%S.%f")[:-3]
+    print(f"[{timestamp}] {message}")
+    sys.stdout.flush()
+
+async def send_tts_welcome_message(websocket, session_id: str, tts_provider, text: str):
+    """Send welcome message TTS audio"""
+    try:
+        # Generate TTS
+        audio_data = await tts_provider.synthesize(text)
+        
+        # Convert to base64
+        audio_base64 = base64.b64encode(audio_data).decode('utf-8')
+        
+        # Send in chunks
+        chunk_size = 16384
+        total_length = len(audio_base64)
+        total_chunks = (total_length + chunk_size - 1) // chunk_size
+        
+        for i in range(0, total_length, chunk_size):
+            chunk = audio_base64[i:i + chunk_size]
+            chunk_index = i // chunk_size
+            
+            await websocket.send_json({
+                "type": "tts_audio",
+                "data": chunk,
+                "chunk_index": chunk_index,
+                "total_chunks": total_chunks,
+                "is_last": chunk_index == total_chunks - 1,
+                "mime_type": "audio/mpeg"
+            })
+        
+        log_info(f"✅ Welcome message TTS sent", session_id=session_id)
+        
+    except Exception as e:
+        log_error(f"Failed to send welcome TTS", error=str(e), session_id=session_id)