first pass at turn based conversation

vocode/streaming/telephony/inbound_call_server.py

@@ -0,0 +1,62 @@
+from fastapi import FastAPI, Response, Form
+from typing import Optional
+import requests
+import uvicorn
+
+import vocode
+from vocode.streaming.models.transcriber import TranscriberConfig
+from vocode.streaming.models.synthesizer import SynthesizerConfig
+from vocode.streaming.models.agent import AgentConfig
+from vocode.streaming.models.telephony import (
+    CreateInboundCall,
+    TwilioConfig,
+    TwilioConfig,
+)
+
+
+class InboundCallServer:
+    def __init__(
+        self,
+        agent_config: AgentConfig,
+        transcriber_config: Optional[TranscriberConfig] = None,
+        synthesizer_config: Optional[SynthesizerConfig] = None,
+        response_on_rate_limit: Optional[str] = None,
+        twilio_config: Optional[TwilioConfig] = None,
+    ):
+        self.agent_config = agent_config
+        self.transcriber_config = transcriber_config
+        self.synthesizer_config = synthesizer_config
+        self.app = FastAPI()
+        self.app.post("/vocode")(self.handle_call)
+        self.response_on_rate_limit = (
+            response_on_rate_limit
+            or "The line is really busy right now, check back later!"
+        )
+        self.twilio_config = twilio_config
+        self.vocode_inbound_call_url = f"https://{vocode.base_url}/create_inbound_call"
+
+    async def handle_call(self, twilio_sid: str = Form(alias="CallSid")):
+        response = requests.post(
+            self.vocode_inbound_call_url,
+            headers={"Authorization": f"Bearer {vocode.api_key}"},
+            json=CreateInboundCall(
+                agent_config=self.agent_config,
+                twilio_sid=twilio_sid,
+                transcriber_config=self.transcriber_config,
+                synthesizer_config=self.synthesizer_config,
+                twilio_config=self.twilio_config,
+            ).dict(),
+        )
+        if response.status_code == 429:
+            return Response(
+                f"<Response><Say>{self.response_on_rate_limit}</Say></Response>",
+                media_type="application/xml",
+            )
+        assert response.ok, response.text
+        return Response(
+            response.text,
+            media_type="application/xml",
+        )
+
+    def run(self, host="localhost", port=3000):
+        uvicorn.run(self.app, host=host, port=port)