Add a Local To-do component (#102627)

Co-authored-by: Robert Resch <robert@resch.dev>
Co-authored-by: Martin Hjelmare <marhje52@gmail.com>

homeassistant/components/local_todo/store.py

@@ -0,0 +1,36 @@
+"""Local storage for the Local To-do integration."""
+
+import asyncio
+from pathlib import Path
+
+from homeassistant.core import HomeAssistant
+
+
+class LocalTodoListStore:
+    """Local storage for a single To-do list."""
+
+    def __init__(self, hass: HomeAssistant, path: Path) -> None:
+        """Initialize LocalTodoListStore."""
+        self._hass = hass
+        self._path = path
+        self._lock = asyncio.Lock()
+
+    async def async_load(self) -> str:
+        """Load the calendar from disk."""
+        async with self._lock:
+            return await self._hass.async_add_executor_job(self._load)
+
+    def _load(self) -> str:
+        """Load the calendar from disk."""
+        if not self._path.exists():
+            return ""
+        return self._path.read_text()
+
+    async def async_store(self, ics_content: str) -> None:
+        """Persist the calendar to storage."""
+        async with self._lock:
+            await self._hass.async_add_executor_job(self._store, ics_content)
+
+    def _store(self, ics_content: str) -> None:
+        """Persist the calendar to storage."""
+        self._path.write_text(ics_content)