226 lines
6 KiB
Python
226 lines
6 KiB
Python
import functools
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import importlib
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import os
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import logging
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import json
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import socket
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import sys
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import traceback
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import websocket
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import yaml
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from queue import Queue
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from threading import Thread
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from getopt import getopt
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from .response import Response
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__author__ = 'Fabio Manganiello <info@fabiomanganiello.com>'
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__version__ = '0.3.2'
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#-----------#
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config = {}
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modules = {}
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wrkdir = os.path.dirname(os.path.realpath(__file__))
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def _init_plugin(plugin_name, reload=False):
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global modules
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global config
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if plugin_name in modules and not reload:
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return modules[plugin_name]
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try:
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module = importlib.import_module(__package__ + '.plugins.' + plugin_name)
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except ModuleNotFoundError as e:
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logging.warn('No such plugin: {}'.format(plugin_name))
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raise RuntimeError(e)
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# e.g. plugins.music.mpd main class: MusicMpdPlugin
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cls_name = functools.reduce(
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lambda a,b: a.title() + b.title(),
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(plugin_name.title().split('.'))
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) + 'Plugin'
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plugin_conf = config[plugin_name] if plugin_name in config else {}
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try:
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plugin = getattr(module, cls_name)(plugin_conf)
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modules[plugin_name] = plugin
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except AttributeError as e:
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logging.warn('No such class in {}: {}'.format(
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plugin_name, cls_name))
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raise RuntimeError(e)
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return plugin
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def _exec_func(args, backend=None, retry=True):
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action = args.pop('action')
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tokens = action.split('.')
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module_name = str.join('.', tokens[:-1])
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method_name = tokens[-1:][0]
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try:
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plugin = _init_plugin(module_name)
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except RuntimeError as e: # Module/class not found
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logging.exception(e)
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return
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try:
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response = plugin.run(method=method_name, **args)
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if response and response.is_error():
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logging.warn('Response processed with errors: {}'.format(response))
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else:
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logging.info('Processed response: {}'.format(response))
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except Exception as e:
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response = Response(output=None, errors=[e, traceback.format_exc()])
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logging.exception(e)
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if retry:
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# Put the action back where it was before retrying
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args['action'] = action
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logging.info('Reloading plugin {} and retrying'.format(module_name))
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_init_plugin(module_name, reload=True)
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_exec_func(args, backend, retry=False)
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finally:
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if backend:
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backend.send_msg({ 'response':str(response) })
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def on_msg(msg, backend=None):
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Thread(target=_exec_func, args=(msg,backend)).start()
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def parse_config_file(config_file=None):
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global config
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if config_file:
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locations = [config_file]
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else:
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locations = [
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# ./config.yaml
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os.path.join(wrkdir, 'config.yaml'),
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# ~/.config/platypush/config.yaml
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os.path.join(os.environ['HOME'], '.config', 'platypush', 'config.yaml'),
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# /etc/platypush/config.yaml
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os.path.join(os.sep, 'etc', 'platypush', 'config.yaml'),
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]
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for loc in locations:
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try:
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with open(loc,'r') as f:
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config = yaml.load(f)
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except FileNotFoundError as e:
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pass
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for section in config:
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if 'disabled' in config[section] and config[section]['disabled']:
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del config[section]
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if 'logging' not in config:
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config['logging'] = logging.INFO
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else:
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config['logging'] = getattr(logging, config['logging'].upper())
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if 'device_id' not in config:
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config['device_id'] = socket.gethostname()
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return config
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def get_backends(config):
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backends = {}
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for k in config.keys():
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if k.startswith('backend.'):
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module = importlib.import_module(__package__ + '.' + k)
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# e.g. backend.pushbullet main class: PushbulletBackend
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cls_name = functools.reduce(
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lambda a,b: a.title() + b.title(),
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(module.__name__.title().split('.')[2:])
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) + 'Backend'
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# Ignore the pusher attribute here
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if 'pusher' in config[k]: del config[k]['pusher']
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try:
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b = getattr(module, cls_name)(config[k])
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name = '.'.join((k.split('.'))[1:])
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backends[name] = b
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except AttributeError as e:
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logging.warn('No such class in {}: {}'.format(
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module.__name__, cls_name))
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raise RuntimeError(e)
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return backends
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def get_default_pusher_backend(config):
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backends = ['.'.join((k.split('.'))[1:])
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for k in config.keys() if k.startswith('backend.')
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and 'pusher' in config[k] and config[k]['pusher'] is True]
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return backends[0] if backends else None
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def get_logging_level():
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global config
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return config['logging']
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def get_device_id():
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global config
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return config['device_id'] if 'device_id' in config else None
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def main():
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print('Starting platypush v.{}'.format(__version__))
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debug = False
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config_file = None
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plugins_dir = os.path.join(wrkdir, 'plugins')
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sys.path.insert(0, plugins_dir)
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optlist, args = getopt(sys.argv[1:], 'vh')
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for opt, arg in optlist:
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if opt == '-c':
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config_file = arg
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if opt == '-v':
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debug = True
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elif opt == '-h':
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print('''
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Usage: {} [-v] [-h] [-c <config_file>]
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-v Enable debug mode
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-h Show this help
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-c Path to the configuration file (default: ./config.yaml)
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'''.format(sys.argv[0]))
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return
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config = parse_config_file(config_file)
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if debug: config['logging'] = logging.DEBUG
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logging.basicConfig(level=get_logging_level(), stream=sys.stdout)
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logging.debug('Configuration dump: {}'.format(config))
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mq = Queue()
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backends = get_backends(config)
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for backend in backends.values():
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backend.mq = mq
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backend.start()
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while True:
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try:
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on_msg(mq.get(), backend)
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except KeyboardInterrupt:
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return
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if __name__ == '__main__':
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main()
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# vim:sw=4:ts=4:et:
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