71 lines
2.0 KiB
Python
71 lines
2.0 KiB
Python
#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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import json
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import sys
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from os import environ
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from pathlib import Path
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class Config:
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def __init__(self):
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# class variables
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self.content = None
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self.conf_file = Path('/etc/ejabberd-metrics.conf')
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# dev config overwrite
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if environ.get('ejabberd_metrics_dev'):
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self.conf_file = Path('config.json')
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# read config file
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self._read()
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def _read(self):
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"""init the config object with this method"""
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self._check()
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# open and load json content from config
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with open(self.conf_file, 'r', encoding='utf-8') as f:
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try:
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self.content = json.load(f)
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# catch json decoding errors
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except json.JSONDecodeError as err:
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print(err, file=sys.stderr)
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exit(1)
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def _check(self):
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"""internal method to check if the config file exists"""
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try:
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# if file is present continue
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if self.conf_file.exists():
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return
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# if not create a blank file
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else:
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self.conf_file.touch(mode=0o640)
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# catch permission exceptions as this tries to write to /etc/
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except PermissionError as err:
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print(err, file=sys.stderr)
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sys.exit(err.errno)
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def get(self, key: str = None, default: (str, int) = None) -> (dict, str, int, None):
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"""method to retrieve the whole config data, a single value or the optional default value"""
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# if a special key is request, return only that value
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if key is not None:
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# safety measure
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if key in self.content:
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return self.content[key]
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# if a default value is given return that
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if default is not None:
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return default
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# if the key isn't part if self.content return None
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else:
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return None
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# else return everything
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return self.content
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