zl-q
309 lines
9.6 KiB
Python
309 lines
9.6 KiB
Python
from __future__ import annotations
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import asyncio
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import tempfile
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from contextlib import contextmanager
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from dataclasses import dataclass
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from datetime import date
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from typing import Any, Protocol
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import dashscope
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from ag_ui.core import RunAgentInput, StateSnapshotEvent
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from dashscope.audio.asr import Recognition, RecognitionCallback
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from fastapi import HTTPException
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from sqlalchemy.exc import IntegrityError
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from core.auth.models import CurrentUser
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from core.config.settings import config
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from core.logging import get_logger
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logger = get_logger(__name__)
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@dataclass(frozen=True)
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class TaskAccepted:
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task_id: str
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thread_id: str
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run_id: str
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created: bool
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class AgentRepositoryLike(Protocol):
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async def get_session_owner(self, *, session_id: str) -> str: ...
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async def create_session_for_user(
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self, *, user_id: str, session_id: str | None = None
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) -> str: ...
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async def commit(self) -> None: ...
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async def rollback(self) -> None: ...
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async def get_history_day(
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self, *, session_id: str, before: date | None
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) -> dict[str, object] | None: ...
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async def get_latest_session_id_for_user(self, *, user_id: str) -> str | None: ...
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class QueueClientLike(Protocol):
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async def enqueue(
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self, *, command: dict[str, object], dedup_key: str | None
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) -> str: ...
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class EventStreamLike(Protocol):
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async def read(
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self,
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*,
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session_id: str,
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last_event_id: str | None,
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) -> list[dict[str, object]]: ...
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def ensure_session_owner(*, owner_id: str, current_user: CurrentUser) -> None:
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if owner_id != str(current_user.id):
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raise HTTPException(status_code=403, detail="Forbidden")
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class AgentService:
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def __init__(
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self,
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*,
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repository: AgentRepositoryLike,
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queue: QueueClientLike,
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stream: EventStreamLike,
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) -> None:
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self._repository = repository
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self._queue = queue
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self._stream = stream
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async def enqueue_run(
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self,
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*,
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run_input: RunAgentInput,
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current_user: CurrentUser,
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) -> TaskAccepted:
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created = False
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thread_id = run_input.thread_id
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run_id = run_input.run_id
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try:
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owner = await self._repository.get_session_owner(session_id=thread_id)
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except HTTPException as exc:
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if exc.status_code != 404:
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raise
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try:
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await self._repository.create_session_for_user(
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user_id=str(current_user.id),
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session_id=thread_id,
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)
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await self._repository.commit()
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created = True
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except IntegrityError:
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await self._repository.rollback()
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owner = await self._repository.get_session_owner(session_id=thread_id)
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ensure_session_owner(owner_id=owner, current_user=current_user)
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else:
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ensure_session_owner(owner_id=owner, current_user=current_user)
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try:
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task_id = await self._queue.enqueue(
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command={
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"command": "run",
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"run_input": run_input.model_dump(mode="json", by_alias=True),
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},
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dedup_key=None,
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)
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except Exception: # noqa: BLE001
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raise
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return TaskAccepted(
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task_id=task_id,
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thread_id=thread_id,
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run_id=run_id,
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created=created,
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)
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async def enqueue_resume(
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self,
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*,
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thread_id: str,
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run_input: RunAgentInput,
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current_user: CurrentUser,
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) -> TaskAccepted:
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owner = await self._repository.get_session_owner(session_id=thread_id)
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ensure_session_owner(owner_id=owner, current_user=current_user)
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dedup_key = f"resume:{thread_id}:{run_input.run_id}"
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task_id = await self._queue.enqueue(
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command={
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"command": "resume",
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"run_input": run_input.model_dump(mode="json", by_alias=True),
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},
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dedup_key=dedup_key,
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)
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return TaskAccepted(
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task_id=task_id,
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thread_id=thread_id,
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run_id=run_input.run_id,
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created=False,
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)
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async def stream_events(
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self,
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*,
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thread_id: str,
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last_event_id: str | None,
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current_user: CurrentUser,
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) -> list[dict[str, object]]:
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owner = await self._repository.get_session_owner(session_id=thread_id)
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ensure_session_owner(owner_id=owner, current_user=current_user)
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return await self._stream.read(
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session_id=thread_id,
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last_event_id=last_event_id,
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)
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async def get_history_snapshot(
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self,
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*,
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thread_id: str,
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before: date | None,
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current_user: CurrentUser,
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) -> dict[str, object]:
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owner = await self._repository.get_session_owner(session_id=thread_id)
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ensure_session_owner(owner_id=owner, current_user=current_user)
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day_payload = await self._repository.get_history_day(
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session_id=thread_id,
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before=before,
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)
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snapshot = {
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"scope": "history_day",
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"threadId": thread_id,
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"day": day_payload["day"] if day_payload else None,
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"hasMore": day_payload["hasMore"] if day_payload else False,
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"messages": day_payload["messages"] if day_payload else [],
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}
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event = StateSnapshotEvent(snapshot=snapshot).model_dump(
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mode="json",
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by_alias=True,
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exclude_none=True,
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)
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event["threadId"] = thread_id
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return event
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async def get_user_history_snapshot(
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self,
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*,
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current_user: CurrentUser,
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thread_id: str | None,
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before: date | None,
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) -> dict[str, object]:
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target_thread_id = thread_id
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if target_thread_id is None:
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target_thread_id = await self._repository.get_latest_session_id_for_user(
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user_id=str(current_user.id)
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)
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if target_thread_id is None:
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return StateSnapshotEvent(
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snapshot={
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"scope": "history_day",
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"threadId": None,
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"day": None,
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"hasMore": False,
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"messages": [],
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}
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).model_dump(mode="json", by_alias=True, exclude_none=True)
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return await self.get_history_snapshot(
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thread_id=target_thread_id,
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before=before,
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current_user=current_user,
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)
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class AsrService:
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def __init__(self) -> None:
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self._api_key: str | None = None
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def _get_api_key(self) -> str:
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if self._api_key is None:
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dashscope_key = config.llm.provider_keys.get("dashscope")
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if not dashscope_key:
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raise ValueError(
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"DASHSCOPE_API_KEY not configured. Set SOCIAL_LLM__PROVIDER_KEYS__DASHSCOPE in environment."
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)
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self._api_key = dashscope_key
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return self._api_key
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@contextmanager
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def _temp_wav(self, audio_data: bytes):
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with tempfile.NamedTemporaryFile(delete=False, suffix=".wav") as tmp:
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tmp.write(audio_data)
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tmp_path = tmp.name
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try:
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yield tmp_path
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finally:
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import os
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if os.path.exists(tmp_path):
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os.unlink(tmp_path)
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async def transcribe(self, audio_data: bytes, filename: str) -> str:
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try:
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dashscope.api_key = self._get_api_key()
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with self._temp_wav(audio_data) as tmp_path:
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loop = asyncio.get_event_loop()
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class SyncCallback(RecognitionCallback):
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error: str | None = None
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def on_error(self, result: Any) -> None:
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self.error = str(result)
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callback = SyncCallback()
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recognizer = Recognition(
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model="fun-asr-realtime-2026-02-28",
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callback=callback,
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format="wav",
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sample_rate=16000,
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)
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result: Any = await loop.run_in_executor(
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None,
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lambda: recognizer.call(file=tmp_path),
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)
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if callback.error:
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raise RuntimeError(f"ASR error: {callback.error}")
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if result.status_code != 200:
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raise RuntimeError(f"ASR transcription failed: {result.message}")
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if result.output is None or result.output.sentence is None:
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logger.warning(
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"ASR returned empty result", extra={"request_id": result.request_id}
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)
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return ""
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sentence = result.output.sentence
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if isinstance(sentence, dict):
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transcription = sentence.get("text", "")
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elif isinstance(sentence, list):
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transcription = " ".join(
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item.get("text", "") for item in sentence if isinstance(item, dict)
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)
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else:
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transcription = str(sentence) if sentence else ""
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logger.info(
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"ASR transcription completed",
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extra={"filename": filename, "transcript_length": len(transcription)},
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)
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return transcription
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except Exception as exc:
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logger.exception("ASR transcription error")
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raise RuntimeError(f"ASR transcription failed: {exc}") from exc
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asr_service = AsrService()
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