467 lines
17 KiB
Python
467 lines
17 KiB
Python
"""一条本地采购任务的安全演练流程。
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本模块固定为 ``dry_run``。它会核对商品、动态规格、数量和价格，并停在最终
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提交订单之前；代码中没有提交订单或付款入口。
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"""
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from __future__ import annotations
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from dataclasses import dataclass
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from datetime import datetime, timezone
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from typing import Callable, Mapping
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from .admin_gateway import AdminGateway, AdminGatewayError, ClientInfo
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from .pdd_purchase_adapter import (
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PddPurchaseAdapter,
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PddPurchaseError,
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PurchasePageState,
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)
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from .task_models import OutboxEventRecord, OutboxEventType, TaskStatus
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from .task_repository import TaskRepository
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def utc_now_iso() -> str:
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"""返回精确到秒的 UTC ISO 8601 时间。"""
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return datetime.now(timezone.utc).isoformat(timespec="seconds").replace(
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"+00:00", "Z"
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)
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@dataclass(frozen=True)
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class PurchaseTarget:
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"""从已领取任务中校验出的采购目标。"""
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goods_id: str
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goods_url: str
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options: Mapping[str, str]
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quantity: int
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max_price_cent: int
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@dataclass(frozen=True)
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class PurchaseTaskOutcome:
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"""采购工作线程返回给协调层的简短结果。"""
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kind: str
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message: str
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task_id: str = ""
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PurchaseAdapterFactory = Callable[
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[str, Callable[[], bool]], PddPurchaseAdapter
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]
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class PurchaseTaskService:
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"""只执行本地已保存的采购任务，不领取新任务。"""
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def __init__(
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self,
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gateway: AdminGateway,
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repository: TaskRepository,
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client: ClientInfo,
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device_address: str,
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adapter_factory: PurchaseAdapterFactory,
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*,
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cancelled: Callable[[], bool] = lambda: False,
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) -> None:
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self._gateway = gateway
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self._repository = repository
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self._client = client
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self._device_address = str(device_address or "").strip()
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self._factory = adapter_factory
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self._cancelled = cancelled
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def execute_one_local(self) -> PurchaseTaskOutcome:
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"""先补交结果，再执行最早的本地待执行采购任务。"""
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pending = self._repository.next_pending_outbox()
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if pending is not None:
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return self._submit(pending)
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if not self._device_address:
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raise ValueError("请先在设置页选择并保存 Android 设备")
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task = self._repository.next_purchase_task()
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if task is None:
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return PurchaseTaskOutcome("no_task", "暂无本地待执行的采购任务")
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return self.execute_selected(task.remote_task_id)
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def execute_selected(self, remote_task_id: str) -> PurchaseTaskOutcome:
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"""对指定的本地采购任务执行一次演练。"""
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if not self._device_address:
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raise ValueError("请先在设置页选择并保存 Android 设备")
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if self._cancelled():
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return PurchaseTaskOutcome(
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"cancelled", "采购演练已在开始前取消", remote_task_id
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)
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started = self._repository.start_purchase_run(
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remote_task_id, self._device_address
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)
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adapter: PddPurchaseAdapter | None = None
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step = "purchase_prepare"
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try:
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target = self._target_from_task(started.task)
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adapter = self._factory(self._device_address, self._cancelled)
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step = "purchase_open_goods"
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self._enter_step(remote_task_id, started.attempt_id, step)
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adapter.open_goods(target.goods_url)
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step = "purchase_verify_goods"
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self._enter_step(remote_task_id, started.attempt_id, step)
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state = adapter.read_state()
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self._validate_identity(state, target, "goods")
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step = "purchase_select_options"
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self._enter_step(remote_task_id, started.attempt_id, step)
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self._validate_identity(adapter.read_state(), target, "goods")
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adapter.select_options(target.options)
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step = "purchase_verify_options"
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self._enter_step(remote_task_id, started.attempt_id, step)
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state = adapter.read_state()
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self._validate_selected_options(state, target)
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step = "purchase_set_quantity"
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self._enter_step(remote_task_id, started.attempt_id, step)
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self._validate_selected_options(adapter.read_state(), target)
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adapter.set_quantity(target.quantity)
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step = "purchase_verify_quantity_price"
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self._enter_step(remote_task_id, started.attempt_id, step)
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state = adapter.read_state()
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self._validate_checkout_values(state, target)
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step = "purchase_enter_confirmation"
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self._enter_step(remote_task_id, started.attempt_id, step)
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self._validate_checkout_values(adapter.read_state(), target)
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adapter.enter_confirmation()
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step = "purchase_verify_confirmation"
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self._enter_step(remote_task_id, started.attempt_id, step)
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state = adapter.read_state()
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if state.page_kind != "order_confirmation":
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raise PddPurchaseError(
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"PURCHASE_CONFIRMATION_NOT_REACHED",
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"没有到达最终提交前确认页，已停止演练",
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step=step,
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)
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self._validate_checkout_values(state, target)
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step = "purchase_dry_run_stopped"
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self._enter_step(remote_task_id, started.attempt_id, step)
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adapter.stop_before_submit()
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result = self._result_data(target, state)
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event = self._repository.save_purchase_result(
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remote_task_id, started.attempt_id, result
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)
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except PddPurchaseError as exc:
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event = self._save_failure(
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remote_task_id,
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started.attempt_id,
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exc.code,
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exc.message,
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exc.retryable,
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exc.step or step,
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exc.diagnostics,
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)
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except Exception as exc:
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event = self._save_failure(
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remote_task_id,
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started.attempt_id,
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"PURCHASE_UNEXPECTED",
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f"采购演练在“{step}”发生未知错误：{exc}",
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False,
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step,
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{},
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)
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finally:
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if adapter is not None:
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adapter.close()
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return self._submit(event)
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def _enter_step(
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self, remote_task_id: str, attempt_id: str, step: str
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) -> None:
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"""先持久化步骤，再检查停止请求。"""
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self._repository.update_purchase_step(
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remote_task_id, attempt_id, step
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)
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if self._cancelled():
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raise PddPurchaseError(
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"PURCHASE_CANCELLED",
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"用户已请求停止采购演练",
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step=step,
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)
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@staticmethod
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def _target_from_task(task: object) -> PurchaseTarget:
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payload_root = getattr(task, "admin_payload", None)
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if not isinstance(payload_root, Mapping):
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raise PddPurchaseError(
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"PURCHASE_TASK_INVALID",
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"采购任务原始数据不是对象",
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step="purchase_prepare",
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)
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payload = payload_root.get("payload")
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if not isinstance(payload, Mapping):
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raise PddPurchaseError(
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"PURCHASE_TASK_INVALID",
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"采购任务缺少 payload 对象",
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step="purchase_prepare",
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)
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goods_url = str(payload.get("goods_url") or "").strip()
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goods_id = str(payload.get("goods_id") or "").strip()
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options = payload.get("options")
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quantity = payload.get("quantity")
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max_price_cent = payload.get("max_price_cent")
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if not goods_url or not goods_id:
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raise PddPurchaseError(
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"PURCHASE_TASK_INVALID",
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"采购任务缺少商品链接或商品编号",
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step="purchase_prepare",
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)
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if not isinstance(options, Mapping) or not options:
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raise PddPurchaseError(
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"PURCHASE_TASK_INVALID",
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"采购任务缺少动态规格 options",
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step="purchase_prepare",
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)
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normalized_options: dict[str, str] = {}
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for key, value in options.items():
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checked_key = str(key or "").strip()
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checked_value = str(value or "").strip()
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if not checked_key or not checked_value:
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raise PddPurchaseError(
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"PURCHASE_TASK_INVALID",
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"采购任务 options 的名称和值都不能为空",
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step="purchase_prepare",
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)
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normalized_options[checked_key] = checked_value
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if isinstance(quantity, bool) or not isinstance(quantity, int) or quantity <= 0:
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raise PddPurchaseError(
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"PURCHASE_TASK_INVALID",
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"采购数量必须是大于 0 的整数",
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step="purchase_prepare",
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)
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if (
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isinstance(max_price_cent, bool)
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or not isinstance(max_price_cent, int)
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or max_price_cent <= 0
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):
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raise PddPurchaseError(
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"PURCHASE_TASK_INVALID",
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"人民币价格上限必须是大于 0 的整数分",
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step="purchase_prepare",
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)
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return PurchaseTarget(
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goods_id,
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goods_url,
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normalized_options,
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quantity,
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max_price_cent,
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)
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@staticmethod
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def _validate_identity(
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state: PurchasePageState, target: PurchaseTarget, expected_page: str
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) -> None:
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PurchaseTaskService._validate_common_state(state)
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if state.page_kind != expected_page:
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raise PddPurchaseError(
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"PDD_PAGE_UNKNOWN",
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f"当前页面不是预期的 {expected_page} 页面，已停止演练",
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step="purchase_verify_goods",
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)
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if state.goods_id != target.goods_id:
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raise PddPurchaseError(
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"PURCHASE_GOODS_MISMATCH",
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"当前 PDD 商品与采购任务不一致，已停止演练",
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step="purchase_verify_goods",
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)
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@staticmethod
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def _validate_selected_options(
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state: PurchasePageState, target: PurchaseTarget
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) -> None:
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PurchaseTaskService._validate_common_state(state)
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if state.goods_id != target.goods_id:
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raise PddPurchaseError(
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"PURCHASE_GOODS_MISMATCH",
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"选择规格后商品编号发生变化，已停止演练",
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step="purchase_verify_options",
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)
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if dict(state.selected_options) != dict(target.options):
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raise PddPurchaseError(
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"PURCHASE_OPTIONS_MISMATCH",
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"当前选中规格与采购任务不完全一致，已停止演练",
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step="purchase_verify_options",
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)
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@staticmethod
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def _validate_checkout_values(
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state: PurchasePageState, target: PurchaseTarget
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) -> None:
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PurchaseTaskService._validate_selected_options(state, target)
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if state.quantity != target.quantity:
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raise PddPurchaseError(
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"PURCHASE_QUANTITY_MISMATCH",
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"当前数量与采购任务不一致，已停止演练",
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step="purchase_verify_quantity_price",
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)
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if state.price_cent <= 0:
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raise PddPurchaseError(
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"PURCHASE_PRICE_MISSING",
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"无法读取稳定的当前人民币价格，已停止演练",
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step="purchase_verify_quantity_price",
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)
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if state.price_cent > target.max_price_cent:
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raise PddPurchaseError(
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"PURCHASE_PRICE_EXCEEDED",
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(
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f"当前价格 {state.price_cent} 分超过上限 "
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f"{target.max_price_cent} 分，已停止演练"
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),
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step="purchase_verify_quantity_price",
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)
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@staticmethod
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def _validate_common_state(state: PurchasePageState) -> None:
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if state.page_kind == "captcha":
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raise PddPurchaseError(
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"PDD_PAGE_CAPTCHA",
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"PDD 出现安全验证，请人工处理",
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step="purchase_page_check",
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)
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if state.page_kind == "login_required":
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raise PddPurchaseError(
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"PDD_PAGE_LOGIN_REQUIRED",
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"PDD 登录状态失效，请人工登录后再处理",
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step="purchase_page_check",
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)
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if state.page_kind in {"unknown", "risk_control", "payment"}:
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raise PddPurchaseError(
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"PDD_PAGE_UNKNOWN",
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"PDD 出现未知、风控或支付页面，已停止演练",
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step="purchase_page_check",
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)
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if state.candidate_count != 1:
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raise PddPurchaseError(
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"PURCHASE_AMBIGUOUS_TARGET",
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"页面存在多个候选目标，无法安全确认，已停止演练",
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step="purchase_page_check",
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)
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def _save_failure(
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self,
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remote_task_id: str,
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attempt_id: str,
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code: str,
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message: str,
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retryable: bool,
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step: str,
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diagnostics: Mapping[str, object],
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) -> OutboxEventRecord:
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if code == "PURCHASE_CANCELLED":
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status = TaskStatus.CANCELLED
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elif retryable:
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status = TaskStatus.RETRY_WAIT
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else:
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status = TaskStatus.MANUAL_REVIEW
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return self._repository.save_purchase_failure(
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remote_task_id,
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attempt_id,
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status,
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code,
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message,
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retryable,
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step,
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dict(diagnostics),
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)
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def _submit(self, event: OutboxEventRecord) -> PurchaseTaskOutcome:
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task_id = self._repository.outbox_task_id(event.id)
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self._repository.mark_outbox_sending(event.id)
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try:
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if event.event_type is OutboxEventType.TASK_FAILURE:
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receipt = self._gateway.submit_failure(
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task_id, event.idempotency_key, event.payload_json
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)
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else:
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receipt = self._gateway.submit_result(
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task_id, event.idempotency_key, event.payload_json
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)
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if not receipt.accepted:
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raise AdminGatewayError(
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"ADMIN_RESULT_NOT_ACCEPTED",
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"Admin 未确认接收采购演练结果",
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False,
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)
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except AdminGatewayError as exc:
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message = str(exc)
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if exc.retryable:
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self._repository.mark_outbox_retry(event.id, message)
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return PurchaseTaskOutcome(
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"result_pending",
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f"任务 {task_id} 演练结果已保存在本地，等待提交 Admin：{message}",
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task_id,
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)
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self._repository.mark_outbox_failed(event.id, message)
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return PurchaseTaskOutcome(
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"manual_review",
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f"任务 {task_id} 演练结果被 Admin 拒绝：{message}",
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task_id,
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)
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self._repository.mark_outbox_sent(event.id)
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if event.event_type is OutboxEventType.TASK_FAILURE:
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return PurchaseTaskOutcome(
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"failed",
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f"任务 {task_id} 采购演练未完成，失败信息已提交 Admin",
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task_id,
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)
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return PurchaseTaskOutcome(
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"succeeded",
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f"任务 {task_id} 演练完成并已提交 Admin；没有提交订单",
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task_id,
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)
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def _result_data(
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self, target: PurchaseTarget, state: PurchasePageState
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) -> dict[str, object]:
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return {
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"schema_version": 1,
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"goods_id": target.goods_id,
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"goods_url": target.goods_url,
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"purchase": {
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"mode": "dry_run",
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"requested": {
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"options": dict(target.options),
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"quantity": target.quantity,
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"max_price_cent": target.max_price_cent,
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},
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"confirmed": {
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"options": dict(state.selected_options),
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"quantity": state.quantity,
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"unit_price_cent": state.price_cent,
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"total_price_cent": state.price_cent * state.quantity,
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},
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"confirmation_reached": True,
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"order_submitted": False,
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"payment_attempted": False,
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"order_no": None,
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"ordered_at": None,
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"ordered_at_raw": None,
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"match_status": "not_submitted",
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},
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"captured_at": utc_now_iso(),
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"source": {
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"client_id": self._client.client_id,
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"device_address": self._device_address,
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"mode": "dry_run",
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},
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}
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