mtsd/backend/app/core/admin_request_json.py

"""运营 Web（/web/admin）JSON 请求体解析。

与 ApiCryptoMiddleware 配合：中间件未改写 body 时，在路由内解密 `{ enc, ts, nonce, edata }`
并剥 `{ data: ... }`，避免 FastAPI 声明式 Body 在校验阶段只看到密文信封而 422。
"""

from __future__ import annotations

from typing import Any, Optional, Tuple

from fastapi import Request

from app.core.request_payload import resolve_request_payload


async def parse_admin_request_json(
    request: Request,
    current_user: dict,
    *,
    source: str,
) -> Tuple[Any, Optional[str]]:
    """
    读取 JSON body；dict 时走 resolve_request_payload（明文 / 密文 / data 包装）。

    Returns:
        (payload, None) 成功；
        (_, err_msg) 密文解密失败（此时 payload 为原始 raw，调用方可忽略）。
    """
    raw: Any = await request.json()
    if isinstance(raw, dict):
        resolved = resolve_request_payload(raw, current_user, source=source)
        if resolved == {} and int(raw.get("enc", 0) or 0) == 1:
            return raw, "密文解密失败"
        return resolved, None
    return raw, None