mirror of
https://github.com/MemeMeow-Studio/MemeMeow.git
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317 lines
14 KiB
Python
317 lines
14 KiB
Python
"""公共核心任务控制 HTTP 边界。
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本模块负责任务列表、详情、取消、重试和公开摘要投影。scope-bound service、图片处理
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repository、错误构造与 Agent 取消能力由入口通过 callback 注入，避免反向依赖 ``api.py``。
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"""
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from __future__ import annotations
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from collections.abc import Callable, Mapping
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from datetime import datetime
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from typing import Any
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from fastapi import HTTPException, Query, Request
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from backend.agent_resume import within_total_timeout
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from backend.database import DatabaseError
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from backend.image_naming import public_filename_fields
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from backend.metadata import MetadataError
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from backend.opencode_activity import AgentActivity
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from backend.public_dto import (
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PUBLIC_STAGE_STATUSES,
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normalize_public_filename,
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normalize_public_identifier,
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sanitize_public_timestamp,
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sanitize_task_result,
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)
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from backend.tasks import TaskRecord
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Service = Callable[[Request, str], Any]
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ErrorFactory = Callable[[int, str, str], HTTPException]
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ProcessingRepository = Callable[[Request], Any]
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CancelAgent = Callable[[Request, str], None]
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def activity_payload(value: object) -> dict[str, object] | None:
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"""将 reader 领域值收敛为完整的三个公开活跃度字段。
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输入可以是 ``AgentActivity`` 或 reader 返回的 mapping；字段不完整或类型不安全时
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返回 ``None``。调用场景是任务摘要投影，输出只包含可公开的活跃度字段。
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"""
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if isinstance(value, AgentActivity):
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value = value.as_dict()
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if not isinstance(value, Mapping):
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return None
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completed = value.get("agent_completed_turns", value.get("completed_turns"))
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running = value.get("agent_turn_running", value.get("turn_running"))
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last_activity = value.get("agent_last_activity_at", value.get("last_activity_at"))
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if isinstance(completed, bool) or not isinstance(completed, int) or completed < 0:
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return None
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last_activity = sanitize_public_timestamp(last_activity)
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if not isinstance(running, bool) or last_activity is None:
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return None
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return {
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"agent_completed_turns": completed,
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"agent_turn_running": running,
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"agent_last_activity_at": last_activity,
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}
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def read_agent_activity(request: Request, records: list[TaskRecord]) -> dict[str, object]:
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"""为当前任务页执行一次有界活跃度批量读取，失败时返回空映射。
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输入是当前 scope 已查询的任务记录；输出按 task id 索引的原始领域值。SQLite 观测
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只提供诊断信息，读取失败不得改变任务 API 的主响应语义。
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"""
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task_ids = [record.task_id for record in records if record.task_type == "meme_context_generation"]
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reader = getattr(request.app.state, "agent_activity", None)
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if not task_ids or reader is None:
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return {}
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read_many = getattr(reader, "read_many", None)
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if not callable(read_many):
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read_many = getattr(reader, "read", None)
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if not callable(read_many):
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return {}
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try:
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values = read_many(task_ids)
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except Exception: # noqa: BLE001
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return {}
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if not isinstance(values, Mapping):
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return {}
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return {str(task_id): value for task_id, value in values.items() if isinstance(task_id, str)}
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def task_summary(
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request: Request,
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record: TaskRecord,
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activities: Mapping[str, object] | None = None,
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*,
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service: Service,
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processing_repository: ProcessingRepository,
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) -> dict[str, object]:
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"""将任务转换为安全摘要，并按需装配完整活跃度字段。
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关键输入是当前 scope 的 ``TaskRecord`` 和可选活跃度映射；输出是去除 payload、scope
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身份和物理路径的公开任务 DTO。调用场景是四个任务控制 route 及旧兼容 wrapper。
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"""
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if activities is None:
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activities = read_agent_activity(request, [record])
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elif not isinstance(activities, Mapping):
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activities = {}
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data = record.as_dict(include_payload=False)
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payload = record.payload if isinstance(record.payload, Mapping) else {}
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task_type = record.task_type if isinstance(record.task_type, str) else ""
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public_submission_mode = data.get("submission_mode")
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settings = getattr(request.app.state, "settings", None)
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if settings is not None and task_type == "meme_context_generation" and data.get("resume_available"):
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resume_enabled = bool(getattr(settings, "agent_resume_enabled", False))
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if not resume_enabled:
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data["resume_available"] = False
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data["resume_reason"] = "resume_disabled"
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elif isinstance(data.get("resume_attempts"), int) and data["resume_attempts"] >= int(getattr(settings, "agent_resume_max_attempts", 2)):
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data["resume_available"] = False
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data["resume_reason"] = "resume_budget_exhausted"
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elif isinstance(record.resume_started_at, str):
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try:
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resume_started_at = datetime.fromisoformat(record.resume_started_at.replace("Z", "+00:00"))
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except ValueError:
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resume_started_at = None
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if resume_started_at is not None and not within_total_timeout(
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resume_started_at,
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timeout_seconds=int(getattr(settings, "agent_resume_timeout_seconds", 900)),
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):
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data["resume_available"] = False
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data["resume_reason"] = "resume_budget_exhausted"
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if task_type in {"visual_embedding_generation", "meme_context_generation", "image_auto_rename", "text_embedding_generation"}:
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# NULL 来源只代表旧历史无法可靠归类，不能被前端解释为 standalone。
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data["historical_unclassified"] = public_submission_mode is None
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data["read_only"] = public_submission_mode is None
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data["retry_allowed"] = False
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data["image_stage"] = data.get("image_stage") or {
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"visual_embedding_generation": "visual",
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"meme_context_generation": "agent",
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"image_auto_rename": "auto_rename",
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"text_embedding_generation": "text_embedding",
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}.get(task_type)
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if task_type == "image_auto_rename":
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# pipeline 自动命名只有 warning 才能从专用阶段入口恢复；不可降级
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# failure/blocked/unknown_execution 必须保持停止状态。standalone
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# 终态失败则允许按当前 Meme 输入重新提交独立 Task。
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recoverable_errors = {
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"auto_rename_title_missing",
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"auto_rename_invalid_filename",
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"auto_rename_target_exists",
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"auto_rename_target_changed",
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}
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record_error = record.error if isinstance(record.error, Mapping) else {}
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recoverable = public_submission_mode == "standalone" and record.status == "failed" and record_error.get("error") in recoverable_errors
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processing_job_id = data.get("processing_job_id")
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if public_submission_mode == "pipeline" and isinstance(processing_job_id, str) and processing_job_id:
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try:
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processing = processing_repository(request).snapshot(processing_job_id)
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stage = next((item for item in processing.stages if isinstance(item, Mapping) and item.get("stage") == "auto_rename"), None) if processing else None
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recoverable = bool(stage and stage.get("status") == "warning")
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stage_status = stage.get("status") if stage and isinstance(stage.get("status"), str) and stage.get("status") in PUBLIC_STAGE_STATUSES else None
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data["image_stage_status"] = stage_status
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except (DatabaseError, TypeError, ValueError):
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recoverable = False
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data["image_stage_recoverable"] = recoverable
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if task_type == "meme_context_generation":
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# 只暴露可观察策略；完整 payload 仍留在后端数据库和 Worker 边界内。
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policy = payload.get("reverse_image_policy")
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data["reverse_image_policy"] = policy if isinstance(policy, str) and policy in {"forbid", "auto"} else "forbid"
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activity = activity_payload(activities.get(record.task_id)) if isinstance(record.task_id, str) else None
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if activity is not None:
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data.update(activity)
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elif task_type == "visual_embedding_generation":
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visual_result = sanitize_task_result(
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"visual_embedding_generation",
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{
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"visual_model": payload.get("visual_model"),
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"dimensions": payload.get("visual_dimensions"),
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"preprocess_version": payload.get("preprocess_version"),
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},
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) or {}
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data["visual"] = {
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"model": visual_result.get("visual_model"),
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"dimensions": visual_result.get("dimensions"),
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"preprocess_version": visual_result.get("preprocess_version"),
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}
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meme_id = normalize_public_identifier(payload.get("meme_id"))
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if meme_id:
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try:
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meme_record, _image = service(request, "metadata").image_for_meme(meme_id)
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image_data: dict[str, object] = {"meme_id": meme_id, "media_url": f"/media/{meme_id}"}
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try:
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image_data.update(public_filename_fields(meme_record))
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except ValueError:
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# 展示字段损坏时保留 Meme 关联，但绝不把内容寻址 key 投影给客户端。
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pass
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data["image"] = image_data
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except MetadataError:
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data["image"] = {"meme_id": meme_id}
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return data
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async def list_tasks(
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request: Request,
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*,
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status: list[str] = Query(default=[]),
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task_type: list[str] = Query(default=[]),
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cursor: str | None = Query(default=None, max_length=128),
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limit: int = Query(default=50, ge=1, le=100),
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service: Service,
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processing_repository: ProcessingRepository,
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) -> dict[str, object]:
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"""按筛选条件分页列出任务安全摘要。
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输出包含 ``items`` 与 ``next_cursor``；任务查询始终通过注入的当前 scope service 完成。
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"""
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records, next_cursor = service(request, "tasks").list(statuses=set(status) or None, task_types=set(task_type) or None, cursor=cursor, limit=limit)
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activities = read_agent_activity(request, records)
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return {"items": [task_summary(request, record, activities, service=service, processing_repository=processing_repository) for record in records], "next_cursor": next_cursor}
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async def get_task(
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request: Request,
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task_id: str,
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*,
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service: Service,
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error: ErrorFactory,
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processing_repository: ProcessingRepository,
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) -> dict[str, object]:
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"""查询持久任务详情，并保留图片处理父 Job 的旧轮询回退。
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找不到普通任务时只查询当前 scope 的图片处理 repository；两者均缺失时返回稳定
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``task_not_found`` 错误，不泄露其它 scope 的任务事实。
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"""
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record = service(request, "tasks").get(task_id)
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if record is None:
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# 图片处理 job 与叶子 Task 使用不同控制面，但旧前端只知道统一的
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# ``/tasks/{id}`` 轮询入口；回退查询仍严格绑定当前请求 scope。
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try:
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snapshot = processing_repository(request).snapshot(task_id)
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except (TypeError, ValueError):
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snapshot = None
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if snapshot is not None:
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# 上传/合集旧客户端把父 Job 当作视觉任务轮询；新客户端使用
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# /images/processing/{job_id} 获取完整四阶段 DTO。这里只保留
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# 旧轮询所需的任务类型兼容值，不改变父 Job 的真实状态。
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data = snapshot.as_dict()
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data["task_type"] = "visual_embedding_generation"
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data["image_stage"] = "visual"
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return data
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raise error(404, "task_not_found", "任务不存在")
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return task_summary(request, record, service=service, processing_repository=processing_repository)
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async def cancel_task(
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request: Request,
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task_id: str,
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*,
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service: Service,
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error: ErrorFactory,
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processing_repository: ProcessingRepository,
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cancel_agent: CancelAgent | None = None,
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) -> dict[str, object]:
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"""取消单个未完成任务，不停止共享 Agent 容器或其他 session。
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已完成任务直接返回摘要；任务服务负责真正的状态转换，Agent 取消只作为可选适配
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能力按当前任务类型调用。
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"""
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tasks = service(request, "tasks")
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record = tasks.get(task_id)
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if record is None:
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raise error(404, "task_not_found", "任务不存在")
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if record.status in {"succeeded", "failed"}:
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return task_summary(request, record, service=service, processing_repository=processing_repository)
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if not tasks.cancel(task_id):
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record = tasks.get(task_id)
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if record is None:
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raise error(404, "task_not_found", "任务不存在")
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if record.task_type == "meme_context_generation" and cancel_agent is not None:
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cancel_agent(request, task_id)
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current = tasks.get(task_id)
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return task_summary(request, current or record, service=service, processing_repository=processing_repository)
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async def retry_task(
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request: Request,
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task_id: str,
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*,
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service: Service,
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error: ErrorFactory,
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processing_repository: ProcessingRepository,
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) -> dict[str, object]:
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"""只重试当前失败阶段；视觉/Agent/文本任务不会隐式级联。
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task service 的稳定 RuntimeError code 映射为既有 HTTP 错误；未知诊断文本不直接
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暴露给客户端。
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"""
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try:
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record = service(request, "tasks").retry(task_id)
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except RuntimeError as exc:
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code = str(exc).split(":", 1)[0]
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if code == "task_not_found":
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raise error(404, code, "任务不存在") from exc
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if code == "task_not_failed":
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raise error(409, code, "只有失败任务可以重试") from exc
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if code == "image_stage_retry_forbidden":
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raise error(409, code, "图片阶段必须通过完整 Job 或专用阶段入口重试") from exc
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if code == "agent_backpressure":
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raise error(429, code, "Agent 等待队列已满，请稍后重试") from exc
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raise error(409, code, "任务重试失败") from exc
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return task_summary(request, record, service=service, processing_repository=processing_repository)
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__all__ = [
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"activity_payload",
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"cancel_task",
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"get_task",
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"list_tasks",
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"read_agent_activity",
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"retry_task",
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"task_summary",
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]
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