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"""Abstract interface for file storage implementations."""
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from abc import ABC, abstractmethod
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from collections.abc import Generator
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from flask import Flask
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class BaseStorage(ABC):
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"""Interface for file storage.
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"""
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app = None
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def __init__(self, app: Flask):
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self.app = app
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@abstractmethod
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def save(self, filename, data):
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raise NotImplementedError
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@abstractmethod
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def load_once(self, filename: str) -> bytes:
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raise NotImplementedError
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@abstractmethod
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def load_stream(self, filename: str) -> Generator:
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raise NotImplementedError
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@abstractmethod
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def download(self, filename, target_filepath):
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raise NotImplementedError
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@abstractmethod
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def exists(self, filename):
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raise NotImplementedError
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@abstractmethod
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def delete(self, filename):
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raise NotImplementedError
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