forked from kate/uniborg
54 lines
1.5 KiB
Python
54 lines
1.5 KiB
Python
# This Source Code Form is subject to the terms of the Mozilla Public
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# License, v. 2.0. If a copy of the MPL was not distributed with this
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# file, You can obtain one at http://mozilla.org/MPL/2.0/.
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import json
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from pathlib import Path
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FILE_NAME = 'data.json'
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class Storage:
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class _Guard:
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def __init__(self, storage):
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self._storage = storage
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def __enter__(self):
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self._storage._autosave = False
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def __exit__(self, *args):
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self._storage._autosave = True
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self._storage._save()
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def __init__(self, root):
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self._root = Path(root)
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self._autosave = True
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self._guard = self._Guard(self)
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if (self._root / FILE_NAME).is_file():
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with open(self._root / FILE_NAME) as fp:
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self._data = json.load(fp)
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else:
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self._data = {}
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def bulk_save(self):
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return self._guard
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def __getattr__(self, name):
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if name.startswith('_'):
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raise ValueError('You can only access existing private members')
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return self._data.get(name, None)
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def __setattr__(self, name, value):
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if name.startswith('_'):
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self.__dict__[name] = value
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else:
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self._data[name] = value
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if self._autosave:
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self._save()
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def _save(self):
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if not self._root.is_dir():
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self._root(parents=True, exist_ok=True)
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with open(self._root / FILE_NAME, 'w') as fp:
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json.dump(self._data, fp)
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