WIP storage

backup_box/storage/__init__.py

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+from .local_storage import LocalStorage
+
+__all__ = [
+    "LocalStorage"
+]

backup_box/storage/local_storage.py

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+from .storage import Storage
+
+class LocalStorage(Storage):
+    pass

backup_box/storage/storage.py

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+from abc import ABC, abstractmethod
+from ..config import StorageItem
+
+class Storage(ABC):
+    @classmethod
+    def get_storage_type(cls) -> str:
+        return cls.__name__ + "Item"
+    
+    @classmethod
+    @abstractmethod
+    def from_config(cls, cfg: StorageItem) -> 'Storage':
+        ...