Add todo component (#100019)

homeassistant/components/todo/const.py

@@ -0,0 +1,24 @@
+"""Constants for the To-do integration."""
+
+from enum import IntFlag, StrEnum
+
+DOMAIN = "todo"
+
+
+class TodoListEntityFeature(IntFlag):
+    """Supported features of the To-do List entity."""
+
+    CREATE_TODO_ITEM = 1
+    DELETE_TODO_ITEM = 2
+    UPDATE_TODO_ITEM = 4
+    MOVE_TODO_ITEM = 8
+
+
+class TodoItemStatus(StrEnum):
+    """Status or confirmation of a To-do List Item.
+
+    This is a subset of the statuses supported in rfc5545.
+    """
+
+    NEEDS_ACTION = "needs_action"
+    COMPLETED = "completed"