初始化奇妙小屏幕控制器项目

各种归档/20260907_OTA1.1.0软件安装节点验证/1.0.3旧更新器/state.py

@@ -0,0 +1,44 @@
+from __future__ import annotations
+
+from datetime import datetime, timezone
+import json
+from pathlib import Path
+from typing import Any
+
+from app.persistence import atomic_write_bytes
+
+OTA_STATE_SCHEMA_VERSION = 1
+
+
+def utc_now() -> str:
+    return datetime.now(timezone.utc).isoformat(timespec="seconds").replace("+00:00", "Z")
+
+
+def read_json(path: Path) -> dict[str, Any] | None:
+    try:
+        value = json.loads(Path(path).read_text(encoding="utf-8"))
+    except (OSError, UnicodeError, json.JSONDecodeError):
+        return None
+    return value if isinstance(value, dict) else None
+
+
+def write_json(path: Path, document: dict[str, Any]) -> None:
+    atomic_write_bytes(
+        Path(path),
+        (json.dumps(document, ensure_ascii=False, indent=2, sort_keys=True) + "\n").encode("utf-8"),
+    )
+
+
+def read_last_result(data_root: Path) -> dict[str, Any] | None:
+    document = read_json(Path(data_root) / "ota" / "state.json")
+    if not document or document.get("schema_version") != OTA_STATE_SCHEMA_VERSION:
+        return None
+    result = document.get("last_result")
+    return dict(result) if isinstance(result, dict) else None
+
+
+def write_last_result(data_root: Path, result: dict[str, Any]) -> None:
+    write_json(
+        Path(data_root) / "ota" / "state.json",
+        {"schema_version": OTA_STATE_SCHEMA_VERSION, "last_result": dict(result)},
+    )