Added RTVIActionFrame (#464)

* added RTVIActionFrame

* server-sent events

* reverted log changes

* fixup

src/pipecat/processors/frameworks/rtvi.py

@@ -8,12 +8,14 @@
 
 from typing import Any, Awaitable, Callable, Dict, List, Literal, Optional, Union
 from pydantic import BaseModel, Field, PrivateAttr, ValidationError
+from dataclasses import dataclass
 
 from pipecat.frames.frames import (
     BotInterruptionFrame,
     BotStartedSpeakingFrame,
     BotStoppedSpeakingFrame,
     CancelFrame,
+    DataFrame,
     EndFrame,
     ErrorFrame,
     Frame,
@@ -119,6 +121,12 @@ class RTVIActionRun(BaseModel):
     arguments: Optional[List[RTVIActionRunArgument]] = None
 
 
+@dataclass
+class RTVIActionFrame(DataFrame):
+    rtvi_action_run: RTVIActionRun
+    message_id: Optional[str] = None
+
+
 class RTVIMessage(BaseModel):
     label: Literal["rtvi-ai"] = "rtvi-ai"
     type: str
@@ -376,6 +384,8 @@ async def process_frame(self, frame: Frame, direction: FrameDirection):
             await self.push_frame(frame, direction)
         elif isinstance(frame, TransportMessageFrame):
             await self._message_queue.put(frame)
+        elif isinstance(frame, RTVIActionFrame):
+            await self._handle_action(frame.message_id, frame.rtvi_action_run)
         # Other frames
         else:
             await self.push_frame(frame, direction)
@@ -548,7 +558,7 @@ async def _handle_function_call_result(self, data):
         )
         await self.push_frame(frame)
 
-    async def _handle_action(self, request_id: str, data: RTVIActionRun):
+    async def _handle_action(self, request_id: str | None, data: RTVIActionRun):
         action_id = self._action_id(data.service, data.action)
         if action_id not in self._registered_actions:
             await self._send_error_response(request_id, f"Action {action_id} not registered")
@@ -559,8 +569,11 @@ async def _handle_action(self, request_id: str, data: RTVIActionRun):
             for arg in data.arguments:
                 arguments[arg.name] = arg.value
         result = await action.handler(self, action.service, arguments)
-        message = RTVIActionResponse(id=request_id, data=RTVIActionResponseData(result=result))
-        await self._push_transport_message(message)
+        # Only send a response if request_id is present. Things that don't care about
+        # action responses (such as webhooks) don't set a request_id
+        if request_id:
+            message = RTVIActionResponse(id=request_id, data=RTVIActionResponseData(result=result))
+            await self._push_transport_message(message)
 
     async def _maybe_send_bot_ready(self):
         if self._pipeline_started and self._client_ready: