Update examples to use transcription events from context aggregators

examples/foundational/40-aws-nova-sonic.py

@@ -21,7 +21,11 @@ from pipecat.pipeline.pipeline import Pipeline
 from pipecat.pipeline.runner import PipelineRunner
 from pipecat.pipeline.task import PipelineParams, PipelineTask
 from pipecat.processors.aggregators.llm_context import LLMContext
-from pipecat.processors.aggregators.llm_response_universal import LLMContextAggregatorPair
+from pipecat.processors.aggregators.llm_response_universal import (
+    AssistantTurnStoppedMessage,
+    LLMContextAggregatorPair,
+    UserTurnStoppedMessage,
+)
 from pipecat.runner.types import RunnerArguments
 from pipecat.runner.utils import create_transport
 from pipecat.services.aws.nova_sonic.llm import AWSNovaSonicLLMService
@@ -154,14 +158,17 @@ async def run_bot(transport: BaseTransport, runner_args: RunnerArguments):
     )
     context_aggregator = LLMContextAggregatorPair(context)
 
+    user_aggregator = context_aggregator.user()
+    assistant_aggregator = context_aggregator.assistant()
+
     # Build the pipeline
     pipeline = Pipeline(
         [
             transport.input(),
-            context_aggregator.user(),
+            user_aggregator,
             llm,
             transport.output(),
-            context_aggregator.assistant(),
+            assistant_aggregator,
         ]
     )
 
@@ -192,6 +199,18 @@ async def run_bot(transport: BaseTransport, runner_args: RunnerArguments):
         logger.info(f"Client disconnected")
         await task.cancel()
 
+    @user_aggregator.event_handler("on_user_turn_stopped")
+    async def on_user_turn_stopped(aggregator, strategy, message: UserTurnStoppedMessage):
+        timestamp = f"[{message.timestamp}] " if message.timestamp else ""
+        line = f"{timestamp}user: {message.content}"
+        logger.info(f"Transcript: {line}")
+
+    @assistant_aggregator.event_handler("on_assistant_turn_stopped")
+    async def on_assistant_turn_stopped(aggregator, message: AssistantTurnStoppedMessage):
+        timestamp = f"[{message.timestamp}] " if message.timestamp else ""
+        line = f"{timestamp}assistant: {message.content}"
+        logger.info(f"Transcript: {line}")
+
     # Run the pipeline
     runner = PipelineRunner(handle_sigint=runner_args.handle_sigint)
     await runner.run(task)