chore: initial import

plugins/trainingsplan/storage.py

@@ -0,0 +1,27 @@
+# -*- coding: utf-8 -*-
+from __future__ import annotations
+import json, os, shutil, tempfile
+from datetime import datetime, timezone
+from pathlib import Path
+from typing import Any
+
+
+def utc_now() -> str:
+    return datetime.now(timezone.utc).isoformat(timespec="seconds")
+
+
+def atomic_json_write(path: str | Path, payload: Any, backup_dir: str | Path | None = None) -> None:
+    target = Path(path)
+    target.parent.mkdir(parents=True, exist_ok=True)
+    if backup_dir and target.exists():
+        bdir = Path(backup_dir); bdir.mkdir(parents=True, exist_ok=True)
+        stamp = datetime.now(timezone.utc).strftime("%Y%m%dT%H%M%S%fZ")
+        shutil.copy2(target, bdir / f"{target.stem}_{stamp}{target.suffix}")
+    fd, tmp = tempfile.mkstemp(prefix=f".{target.name}.", suffix=".tmp", dir=target.parent)
+    try:
+        with os.fdopen(fd, "w", encoding="utf-8") as handle:
+            json.dump(payload, handle, ensure_ascii=False, indent=2)
+            handle.flush(); os.fsync(handle.fileno())
+        os.replace(tmp, target)
+    finally:
+        if os.path.exists(tmp): os.unlink(tmp)