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https://github.com/dograh-hq/dograh.git
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4a6752e62b
Conference-based transfer for Telnyx with a two-step flow: - transfer_call dials the destination with a per-transfer webhook URL. - On call.answered, the webhook seeds a conference with the destination's live call_control_id and publishes DESTINATION_ANSWERED. - TelnyxConferenceStrategy joins the caller into the conference on pipeline teardown (EndTaskReason.TRANSFER_CALL). - On post-answer destination hangup, the webhook hangs up the caller — Telnyx's create_conference doesn't accept end_conference_on_exit on the seed leg, so we tear down the bridge ourselves. TransferContext gains optional workflow_run_id (for webhook→provider resolution in multi-config orgs) and conference_id (set on answer, rd by the strategy). Also fixes the transfer tool's provider lookup to go through get_telephony_provider_for_run instead of the deprecated org-default shim, which was returning the wrong provider in multi-config orgs.
68 lines
2.3 KiB
Python
68 lines
2.3 KiB
Python
"""Telnyx transport factory."""
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from fastapi import WebSocket
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from pipecat.transports.websocket.fastapi import (
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FastAPIWebsocketParams,
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FastAPIWebsocketTransport,
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)
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from api.services.pipecat.audio_config import AudioConfig
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from api.services.pipecat.audio_mixer import build_audio_out_mixer
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from api.services.telephony.factory import load_credentials_for_transport
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from .serializers import TelnyxFrameSerializer
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from .strategies import TelnyxConferenceStrategy, TelnyxHangupStrategy
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async def create_transport(
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websocket: WebSocket,
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workflow_run_id: int,
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audio_config: AudioConfig,
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organization_id: int,
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*,
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ambient_noise_config: dict | None = None,
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telephony_configuration_id: int | None = None,
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stream_id: str,
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call_control_id: str,
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encoding: str = "PCMU",
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):
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"""Create a transport for Telnyx connections."""
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config = await load_credentials_for_transport(
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organization_id, telephony_configuration_id, expected_provider="telnyx"
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)
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api_key = config.get("api_key")
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if not api_key:
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raise ValueError(
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f"Incomplete Telnyx configuration for organization {organization_id}"
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)
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# Pipecat's TelnyxFrameSerializer names its params from the call's POV,
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# not Dograh's: ``inbound_encoding`` is what we *send into the call*
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# (Dograh → Telnyx), and ``outbound_encoding`` is what we *receive out of
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# the call* (Telnyx → Dograh).
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serializer = TelnyxFrameSerializer(
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stream_id=stream_id,
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call_control_id=call_control_id,
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api_key=api_key,
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inbound_encoding="PCMU", # Dograh → Telnyx; matches stream_bidirectional_codec
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outbound_encoding=encoding, # Telnyx → Dograh; from media_format.encoding
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transfer_strategy=TelnyxConferenceStrategy(),
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hangup_strategy=TelnyxHangupStrategy(),
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)
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mixer = await build_audio_out_mixer(
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audio_config.transport_out_sample_rate, ambient_noise_config
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)
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return FastAPIWebsocketTransport(
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websocket=websocket,
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params=FastAPIWebsocketParams(
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audio_in_enabled=True,
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audio_out_enabled=True,
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audio_in_sample_rate=audio_config.transport_in_sample_rate,
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audio_out_sample_rate=audio_config.transport_out_sample_rate,
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audio_out_mixer=mixer,
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serializer=serializer,
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),
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)
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