60 lines
1.7 KiB
Python
60 lines
1.7 KiB
Python
from __future__ import absolute_import
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import os
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import appdirs
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import yaml
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from . import printer
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from . import exceptions
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class Config(object):
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_app_name = 'python-escpos'
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_config_file = 'config.yaml'
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def __init__(self):
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self._has_loaded = False
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self._printer = None
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self._printer_name = None
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self._printer_config = None
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def load(self, config_path=None):
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if not config_path:
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config_path = os.path.join(
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appdirs.user_config_dir(self._app_name),
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self._config_file
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)
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try:
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config = yaml.safe_load(f)
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except EnvironmentError as e:
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raise exceptions.ConfigNotFoundError('Couldn\'t read config at one or more of {config_path}'.format(
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config_path="\n".join(config_path),
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))
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except yaml.ParserError as e:
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raise exceptions.ConfigSyntaxError('Error parsing YAML')
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if 'printer' in config:
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self._printer_config = config['printer']
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self._printer_name = self._printer_config.pop('type').title()
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if not self._printer_name or not hasattr(printer, self._printer_name):
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raise exceptions.ConfigSyntaxError('Printer type "{printer_name}" is invalid'.format(
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printer_name=self._printer_name,
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))
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self._has_loaded = True
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def printer(self):
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if not self._has_loaded:
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self.load()
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if not self._printer:
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# We could catch init errors and make them a ConfigSyntaxError,
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# but I'll just let them pass
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self._printer = getattr(printer, self._printer_name)(**self._printer_config)
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return self._printer
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