97 lines
2.7 KiB
Python
97 lines
2.7 KiB
Python
#!/usr/bin/python3
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# -*- coding: utf-8 -*-
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import sys
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import logging
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logging = logging.getLogger()
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import os.path
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import importlib
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from os import listdir
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class Plugin(object):
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'''
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Proto type of plugin class. Only subclasses are valid plugins.
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'''
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__command = ''
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@staticmethod
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def get_module():
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return Plugin.__module
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@staticmethod
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def get_command():
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return Plugin.__command
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@staticmethod
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def get_description():
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return Plugin.__description
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def __init__(self, callback):
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self.callback = callback
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def help(self):
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return 'Sorry ... Help is unavailable at the moment'
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def run(self, msg):
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self.callback('Sorry ... Run is unavailable at the moment')
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class PluginManager():
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'''
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Handles the plugins. Optional becomes a directory for search plugins.
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'''
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def __init__(self, plug_dir=None):
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'''
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Initialize callback function and plugin directory. If no callback is
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given it returns imediality. If no plugin directory is given it uses
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actual directory.
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'''
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if plug_dir is None:
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self.plugin_dir = './plugins'
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else: self.plugin_dir = plug_dir
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def collect_plugins(self):
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'''
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Find all files in plugin directory and grabs filename, provided
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command and short description.
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'''
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self.plugins = {}
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search_dir = os.path.realpath(self.plugin_dir)
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sys.path.insert(0, search_dir)
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logging.debug('Search plugins in {}'.format(search_dir))
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files = [x[:-3] for x in os.listdir(search_dir) if x.endswith('.py')]
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for filename in files:
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plugin = self.import_plugin(filename)
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if plugin is False:
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continue
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command = plugin.Plugin.get_command()
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self.plugins[command] = plugin
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return self.plugins
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def import_plugin(self, filename):
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'''
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Imports or reimports a module depending its known or not. It's
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tested by the command provided by the plugin. (Not best praxis but
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the easyst way. And i dont know, what a trouble is causes, if a
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module ist moved.)
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param 1: string
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'''
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try:
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plugin = importlib.import_module(filename)
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except Exception as e:
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logging.error('Cant import module: {}'.format(filename))
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logging.error('Exception: {}'.format(e))
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return False
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if not issubclass(plugin.Plugin, Plugin):
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logging.error('Not a valid plugin: {}'.format(filename))
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return False
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logging.debug('Found plugin {}.'.format(filename))
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return plugin
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