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#
# Copyright (c) 2024, Daily
#
# SPDX-License-Identifier: BSD 2-Clause License
#
from typing import Coroutine
from pipecat.frames.frames import Frame, TextFrame
from pipecat.processors.frame_processor import FrameDirection, FrameProcessor
class StatelessTextTransformer(FrameProcessor):
"""This processor calls the given function on any text in a text frame.
>>> async def print_frames(aggregator, frame):
... async for frame in aggregator.process_frame(frame):
... print(frame.text)
>>> aggregator = StatelessTextTransformer(lambda x: x.upper())
>>> asyncio.run(print_frames(aggregator, TextFrame("Hello")))
HELLO
"""
def __init__(self, transform_fn):
super().__init__()
self._transform_fn = transform_fn
async def process_frame(self, frame: Frame, direction: FrameDirection):
await super().process_frame(frame, direction)
if isinstance(frame, TextFrame):
result = self._transform_fn(frame.text)
if isinstance(result, Coroutine):
result = await result
await self.push_frame(result)
else:
await self.push_frame(frame, direction)
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