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62 lines
1.7 KiB
62 lines
1.7 KiB
4 years ago
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from os import environ, mkdir
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from os.path import exists
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from pathlib import Path
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from logging import DEBUG, INFO, basicConfig, getLogger
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from json import dumps, loads
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class SimpleDatabase(dict):
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"""A simple database.
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It is a dictionary which saves to disk on all writes. It is optimised for
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ease of hacking and accessibility and not for performance or efficiency.
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Written by decentral1se, as part of:
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https://git.vvvvvvaria.org/decentral1se/xbotlib/src/branch/main/xbotlib.py
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"""
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def __init__(self, filename, log, *args, **kwargs):
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"""Initialise the object."""
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self.filename = Path(filename).absolute()
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self.log = getLogger(__name__)
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self._loads()
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self.update(*args, **kwargs)
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def _loads(self):
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"""Load the database."""
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if not exists(self.filename):
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return
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try:
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with open(self.filename, "r") as handle:
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self.update(loads(handle.read()))
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except Exception as exception:
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message = f"Loading file storage failed: {exception}"
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self.log.error(message, exc_info=exception)
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exit(1)
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def _dumps(self):
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"""Save the databse to disk."""
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try:
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with open(self.filename, "w") as handle:
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handle.write(dumps(self, indent=4, sort_keys=True))
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except Exception as exception:
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message = f"Saving file storage failed: {exception}"
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self.log.error(message, exc_info=exception)
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exit(1)
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def __setitem__(self, key, val):
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"""Write data to the database."""
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super().__setitem__(key, val)
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self._dumps()
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def __delitem__(self, key):
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"""Remove data from the database."""
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super().__delitem__(key)
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self._dumps()
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def update(self, *args, **kwargs):
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"""Update the database."""
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for k, v in dict(*args, **kwargs).items():
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self[k] = v
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self._dumps()
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