forked from platypush/platypush
Support for context variables and constants
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19cfafb2c7
commit
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2 changed files with 44 additions and 0 deletions
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@ -1,7 +1,9 @@
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import datetime
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import errno
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import logging
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import os
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import socket
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import time
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import yaml
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""" Config singleton instance """
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@ -31,6 +33,11 @@ class Config(object):
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os.path.join(os.sep, 'etc', 'platypush', 'config.yaml'),
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]
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_default_constants = {
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'today': datetime.date.today().isoformat,
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'now': datetime.datetime.now().isoformat,
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}
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_workdir_location = os.path.join(os.environ['HOME'], '.local', 'share', 'platypush')
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def __init__(self, cfgfile=None):
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@ -68,6 +75,9 @@ class Config(object):
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self.plugins = {}
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self.event_hooks = {}
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self.procedures = {}
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self.constants = {}
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self._init_constants()
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self._init_components()
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@ -115,6 +125,14 @@ class Config(object):
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else:
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self.plugins[key] = self._config[key]
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def _init_constants(self):
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if 'constants' in self._config:
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self.constants = self._config['constants']
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for (key,value) in self._default_constants.items():
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self.constants[key] = value
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@staticmethod
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def get_backends():
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global _default_config_instance
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@ -139,6 +157,25 @@ class Config(object):
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if _default_config_instance is None: _default_config_instance = Config()
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return _default_config_instance.procedures
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@staticmethod
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def get_constants():
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global _default_config_instance
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if _default_config_instance is None: _default_config_instance = Config()
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constants = {}
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for name in _default_config_instance.constants.keys():
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constants[name] = Config.get_constant(name)
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return constants
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@staticmethod
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def get_constant(name):
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global _default_config_instance
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if _default_config_instance is None: _default_config_instance = Config()
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if name not in _default_config_instance.constants: return None
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value = _default_config_instance.constants[name]
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return value() if callable(value) else value
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@staticmethod
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def get_default_pusher_backend():
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"""
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@ -69,8 +69,15 @@ class Request(Message):
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def _expand_context(self, event_args=None, **context):
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from platypush.config import Config
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if event_args is None: event_args = copy.deepcopy(self.args)
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constants = Config.get_constants()
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context['constants'] = {}
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for (name,value) in constants.items():
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context['constants'][name] = value
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keys = []
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if isinstance(event_args, dict):
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keys = event_args.keys()
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