Add Doris Kitchen household recipe app

home/doris-kitchen/app/services/store.py

@@ -0,0 +1,51 @@
+import json
+from datetime import datetime, timezone
+from pathlib import Path
+from typing import Any
+from uuid import uuid4
+
+from app.config import settings
+
+
+class JsonStore:
+    def __init__(self) -> None:
+        self.root = Path(settings.state_dir)
+        self.root.mkdir(parents=True, exist_ok=True)
+
+    def _path(self, name: str) -> Path:
+        return self.root / f"{name}.json"
+
+    def load(self, name: str, default: Any) -> Any:
+        path = self._path(name)
+        if not path.exists():
+            return default
+        return json.loads(path.read_text(encoding="utf-8"))
+
+    def save(self, name: str, value: Any) -> Any:
+        path = self._path(name)
+        path.write_text(json.dumps(value, indent=2, sort_keys=True), encoding="utf-8")
+        return value
+
+    def append_collection(self, name: str, item: dict[str, Any]) -> dict[str, Any]:
+        items = self.load(name, [])
+        items.append(item)
+        self.save(name, items)
+        return item
+
+    def update_collection_item(self, name: str, predicate, updater):
+        items = self.load(name, [])
+        updated = None
+        for idx, item in enumerate(items):
+            if predicate(item):
+                items[idx] = updater(dict(item))
+                updated = items[idx]
+                break
+        self.save(name, items)
+        return updated
+
+    def now(self) -> str:
+        return datetime.now(timezone.utc).isoformat()
+
+    def new_id(self, prefix: str) -> str:
+        return f"{prefix}-{uuid4().hex[:12]}"
+