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box/storage/state_store.py

@@ -0,0 +1,24 @@
+"""Runtime state storage (resume, wifi state)."""
+
+from __future__ import annotations
+
+import json
+from pathlib import Path
+from typing import Any
+
+
+class StateStore:
+    def __init__(self, base_dir: Path) -> None:
+        self._path = base_dir / "state.json"
+
+    @property
+    def path(self) -> Path:
+        return self._path
+
+    def load(self) -> dict[str, Any]:
+        if not self._path.exists():
+            return {}
+        return json.loads(self._path.read_text(encoding="utf-8"))
+
+    def save(self, data: dict[str, Any]) -> None:
+        self._path.write_text(json.dumps(data, indent=2), encoding="utf-8")