Add SignalWire endpoints, update queue/hangup for phone callers

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

backend/main.py

@@ -4,11 +4,12 @@ import uuid
 import asyncio
 from dataclasses import dataclass, field
 from pathlib import Path
-from fastapi import FastAPI, HTTPException, WebSocket, WebSocketDisconnect
+from fastapi import FastAPI, HTTPException, WebSocket, WebSocketDisconnect, Request, Response
 from fastapi.staticfiles import StaticFiles
 from fastapi.responses import FileResponse
 import json
 import time
+import httpx
 from fastapi.middleware.cors import CORSMiddleware
 from pydantic import BaseModel
 from typing import Optional
@@ -416,9 +417,48 @@ async def index():
     return FileResponse(frontend_dir / "index.html")
 
 
-@app.get("/call-in")
-async def call_in_page():
-    return FileResponse(frontend_dir / "call-in.html")
+# --- SignalWire Endpoints ---
+
+@app.post("/api/signalwire/voice")
+async def signalwire_voice_webhook(request: Request):
+    """Handle inbound call from SignalWire — return XML to start bidirectional stream"""
+    form = await request.form()
+    caller_phone = form.get("From", "Unknown")
+    call_sid = form.get("CallSid", "")
+    print(f"[SignalWire] Inbound call from {caller_phone} (CallSid: {call_sid})")
+
+    ws_scheme = "wss"
+    host = request.headers.get("host", "radioshow.macneilmediagroup.com")
+    stream_url = f"{ws_scheme}://{host}/api/signalwire/stream"
+
+    xml = f"""<?xml version="1.0" encoding="UTF-8"?>
+<Response>
+    <Connect>
+        <Stream url="{stream_url}" codec="L16@16000h">
+            <Parameter name="caller_phone" value="{caller_phone}"/>
+            <Parameter name="call_sid" value="{call_sid}"/>
+        </Stream>
+    </Connect>
+</Response>"""
+
+    return Response(content=xml, media_type="application/xml")
+
+
+async def _signalwire_end_call(call_sid: str):
+    """End a phone call via SignalWire REST API"""
+    if not call_sid or not settings.signalwire_space:
+        return
+    try:
+        url = f"https://{settings.signalwire_space}/api/laml/2010-04-01/Accounts/{settings.signalwire_project_id}/Calls/{call_sid}"
+        async with httpx.AsyncClient(timeout=10.0) as client:
+            response = await client.post(
+                url,
+                data={"Status": "completed"},
+                auth=(settings.signalwire_project_id, settings.signalwire_token),
+            )
+            print(f"[SignalWire] End call {call_sid}: {response.status_code}")
+    except Exception as e:
+        print(f"[SignalWire] Failed to end call {call_sid}: {e}")
 
 
 # --- Request Models ---
@@ -802,60 +842,54 @@ async def update_settings(data: dict):
     return llm_service.get_settings()
 
 
-# --- Browser Caller WebSocket ---
-
-@app.websocket("/api/caller/stream")
-async def caller_audio_stream(websocket: WebSocket):
-    """Handle browser caller WebSocket — bidirectional audio"""
+@app.websocket("/api/signalwire/stream")
+async def signalwire_audio_stream(websocket: WebSocket):
+    """Handle SignalWire bidirectional audio stream"""
     await websocket.accept()
 
     caller_id = str(uuid.uuid4())[:8]
-    caller_name = "Anonymous"
+    caller_phone = "Unknown"
+    call_sid = ""
     audio_buffer = bytearray()
     CHUNK_DURATION_S = 3
     SAMPLE_RATE = 16000
     chunk_samples = CHUNK_DURATION_S * SAMPLE_RATE
+    stream_started = False
 
     try:
-        # Wait for join message
-        join_data = await websocket.receive_text()
-        join_msg = json.loads(join_data)
-        if join_msg.get("type") == "join":
-            caller_name = join_msg.get("name", "Anonymous").strip() or "Anonymous"
-
-        # Add to queue
-        caller_service.add_to_queue(caller_id, caller_name)
-        caller_service.register_websocket(caller_id, websocket)
-
-        # Notify caller they're queued
-        queue = caller_service.get_queue()
-        position = next((i+1 for i, c in enumerate(queue) if c["caller_id"] == caller_id), 0)
-        await websocket.send_text(json.dumps({
-            "status": "queued",
-            "caller_id": caller_id,
-            "position": position,
-        }))
-
-        # Main loop — handle both text and binary messages
         while True:
-            message = await websocket.receive()
+            raw = await websocket.receive_text()
+            msg = json.loads(raw)
+            event = msg.get("event")
 
-            if message.get("type") == "websocket.disconnect":
-                break
+            if event == "start":
+                custom = msg.get("start", {}).get("customParameters", {})
+                caller_phone = custom.get("caller_phone", "Unknown")
+                call_sid = custom.get("call_sid", "")
+
+                stream_started = True
+                print(f"[SignalWire WS] Stream started: {caller_phone} (CallSid: {call_sid})")
+
+                caller_service.add_to_queue(caller_id, caller_phone)
+                caller_service.register_websocket(caller_id, websocket)
+                if call_sid:
+                    caller_service.register_call_sid(caller_id, call_sid)
+
+            elif event == "media" and stream_started:
+                import base64
+                payload = msg.get("media", {}).get("payload", "")
+                if not payload:
+                    continue
+
+                pcm_data = base64.b64decode(payload)
 
-            if "bytes" in message and message["bytes"]:
-                # Binary audio data — only process if caller is on air
                 call_info = caller_service.active_calls.get(caller_id)
                 if not call_info:
-                    continue  # Still in queue, ignore audio
+                    continue
 
-                pcm_data = message["bytes"]
                 audio_buffer.extend(pcm_data)
-
-                # Route to configured live caller Loopback channel
                 audio_service.route_real_caller_audio(pcm_data, SAMPLE_RATE)
 
-                # Transcribe when we have enough audio
                 if len(audio_buffer) >= chunk_samples * 2:
                     pcm_chunk = bytes(audio_buffer[:chunk_samples * 2])
                     audio_buffer = audio_buffer[chunk_samples * 2:]
@@ -863,24 +897,24 @@ async def caller_audio_stream(websocket: WebSocket):
                         _handle_real_caller_transcription(caller_id, pcm_chunk, SAMPLE_RATE)
                     )
 
-            elif "text" in message and message["text"]:
-                # Control messages (future use)
-                pass
+            elif event == "stop":
+                print(f"[SignalWire WS] Stream stopped: {caller_phone}")
+                break
 
     except WebSocketDisconnect:
-        print(f"[Caller WS] Disconnected: {caller_id} ({caller_name})")
+        print(f"[SignalWire WS] Disconnected: {caller_id} ({caller_phone})")
     except Exception as e:
-        print(f"[Caller WS] Error: {e}")
+        print(f"[SignalWire WS] Error: {e}")
     finally:
         caller_service.unregister_websocket(caller_id)
-        # If still in queue, remove
+        caller_service.unregister_call_sid(caller_id)
         caller_service.remove_from_queue(caller_id)
-        # If on air, clean up
         if caller_id in caller_service.active_calls:
             caller_service.hangup(caller_id)
             if session.active_real_caller and session.active_real_caller.get("caller_id") == caller_id:
                 session.active_real_caller = None
-        # Transcribe remaining audio
+                if len(caller_service.active_calls) == 0:
+                    audio_service.stop_host_stream()
         if audio_buffer:
             asyncio.create_task(
                 _handle_real_caller_transcription(caller_id, bytes(audio_buffer), SAMPLE_RATE)
@@ -945,12 +979,9 @@ async def take_call_from_queue(caller_id: str):
     session.active_real_caller = {
         "caller_id": call_info["caller_id"],
         "channel": call_info["channel"],
-        "name": call_info["name"],
+        "phone": call_info["phone"],
     }
 
-    # Notify caller they're on air via WebSocket
-    await caller_service.notify_caller(caller_id, {"status": "on_air", "channel": call_info["channel"]})
-
     # Start host mic streaming if this is the first real caller
     if len(caller_service.active_calls) == 1:
         _start_host_audio_sender()
@@ -965,8 +996,10 @@ async def take_call_from_queue(caller_id: str):
 @app.post("/api/queue/drop/{caller_id}")
 async def drop_from_queue(caller_id: str):
     """Drop a caller from the queue"""
+    call_sid = caller_service.get_call_sid(caller_id)
     caller_service.remove_from_queue(caller_id)
-    await caller_service.disconnect_caller(caller_id)
+    if call_sid:
+        await _signalwire_end_call(call_sid)
     return {"status": "dropped"}
 
 
@@ -980,18 +1013,18 @@ async def _handle_real_caller_transcription(caller_id: str, pcm_data: bytes, sam
     if not text or not text.strip():
         return
 
-    caller_name = call_info["name"]
-    print(f"[Real Caller] {caller_name}: {text}")
+    caller_phone = call_info["phone"]
+    print(f"[Real Caller] {caller_phone}: {text}")
 
     # Add to conversation with real_caller role
-    session.add_message(f"real_caller:{caller_name}", text)
+    session.add_message(f"real_caller:{caller_phone}", text)
 
     # If AI auto-respond mode is on and an AI caller is active, check if AI should respond
     if session.ai_respond_mode == "auto" and session.current_caller_key:
-        asyncio.create_task(_check_ai_auto_respond(text, caller_name))
+        asyncio.create_task(_check_ai_auto_respond(text, caller_phone))
 
 
-async def _check_ai_auto_respond(real_caller_text: str, real_caller_name: str):
+async def _check_ai_auto_respond(real_caller_text: str, real_caller_phone: str):
     """Check if AI caller should jump in, and generate response if so"""
     if not session.caller:
         return
@@ -1060,13 +1093,15 @@ async def hangup_real_caller():
         raise HTTPException(400, "No active real caller")
 
     caller_id = session.active_real_caller["caller_id"]
-    caller_name = session.active_real_caller["name"]
+    caller_phone = session.active_real_caller["phone"]
     conversation_snapshot = list(session.conversation)
     auto_followup_enabled = session.auto_followup
 
-    # Disconnect the caller immediately
+    # End the phone call via SignalWire
+    call_sid = caller_service.get_call_sid(caller_id)
     caller_service.hangup(caller_id)
-    await caller_service.disconnect_caller(caller_id)
+    if call_sid:
+        asyncio.create_task(_signalwire_end_call(call_sid))
 
     # Stop host streaming if no more active callers
     if len(caller_service.active_calls) == 0:
@@ -1074,24 +1109,22 @@ async def hangup_real_caller():
 
     session.active_real_caller = None
 
-    # Play hangup sound in background
     import threading
     hangup_sound = settings.sounds_dir / "hangup.wav"
     if hangup_sound.exists():
         threading.Thread(target=audio_service.play_sfx, args=(str(hangup_sound),), daemon=True).start()
 
-    # Summarize and store history in background
     asyncio.create_task(
-        _summarize_real_call(caller_name, conversation_snapshot, auto_followup_enabled)
+        _summarize_real_call(caller_phone, conversation_snapshot, auto_followup_enabled)
     )
 
     return {
         "status": "disconnected",
-        "caller": caller_name,
+        "caller": caller_phone,
     }
 
 
-async def _summarize_real_call(caller_name: str, conversation: list, auto_followup_enabled: bool):
+async def _summarize_real_call(caller_phone: str, conversation: list, auto_followup_enabled: bool):
     """Background task: summarize call and store in history"""
     summary = ""
     if conversation:
@@ -1105,11 +1138,11 @@ async def _summarize_real_call(caller_name: str, conversation: list, auto_follow
 
     session.call_history.append(CallRecord(
         caller_type="real",
-        caller_name=caller_name,
+        caller_name=caller_phone,
         summary=summary,
         transcript=conversation,
     ))
-    print(f"[Real Caller] {caller_name} call summarized: {summary[:80]}...")
+    print(f"[Real Caller] {caller_phone} call summarized: {summary[:80]}...")
 
     if auto_followup_enabled:
         await _auto_followup(summary)