Onionr/onionr/onionrplugins.py

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2018-03-03 04:19:01 +00:00
'''
Onionr - P2P Microblogging Platform & Social network
This file deals with management of modules/plugins.
'''
'''
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
'''
import os, re, importlib, config, logger
import onionrevents as events
_pluginsfolder = 'data/plugins/'
_instances = dict()
def reload(stop_event = True):
'''
Reloads all the plugins
'''
check()
try:
enabled_plugins = get_enabled_plugins()
if stop_event is True:
logger.debug('Reloading all plugins...')
else:
logger.debug('Loading all plugins...')
if stop_event is True:
for plugin in enabled_plugins:
stop(plugin)
for plugin in enabled_plugins:
start(plugin)
return True
except:
logger.error('Failed to reload plugins.')
return False
def enable(name, start_event = True):
'''
Enables a plugin
'''
check()
if exists(name):
enabled_plugins = get_enabled_plugins()
enabled_plugins.append(name)
config_plugins = config.get('plugins')
config_plugins['enabled'] = enabled_plugins
config.set('plugins', config_plugins, True)
events.call(get_plugin(name), 'enable')
if start_event is True:
start(name)
return True
else:
logger.error('Failed to enable plugin \"' + name + '\", disabling plugin.')
disable(name)
return False
def disable(name, stop_event = True):
'''
Disables a plugin
'''
check()
if is_enabled(name):
enabled_plugins = get_enabled_plugins()
enabled_plugins.remove(name)
config_plugins = config.get('plugins')
config_plugins['enabled'] = enabled_plugins
config.set('plugins', config_plugins, True)
if exists(name):
events.call(get_plugin(name), 'disable')
if stop_event is True:
stop(name)
def start(name):
'''
Starts the plugin
'''
check()
if exists(name):
try:
plugin = get_plugin(name)
if plugin is None:
raise Exception('Failed to import module.')
else:
events.call(plugin, 'start')
return plugin
except:
logger.error('Failed to start module \"' + name + '\".')
else:
logger.error('Failed to start nonexistant module \"' + name + '\".')
return None
def stop(name):
'''
Stops the plugin
'''
check()
if exists(name):
try:
plugin = get_plugin(name)
if plugin is None:
raise Exception('Failed to import module.')
else:
events.call(plugin, 'stop')
return plugin
except:
logger.error('Failed to stop module \"' + name + '\".')
else:
logger.error('Failed to stop nonexistant module \"' + name + '\".')
return None
def get_plugin(name):
'''
Returns the instance of a module
'''
check()
if str(name).lower() in _instances:
return _instances[str(name).lower()]
else:
_instances[str(name).lower()] = importlib.import_module(get_plugins_folder(name, False).replace('/', '.') + 'main')
return get_plugin(name)
def get_plugins():
'''
Returns a list of plugins (deprecated)
'''
return _instances
def exists(name):
'''
Return value indicates whether or not the plugin exists
'''
check()
return os.path.isdir(get_plugins_folder(str(name).lower()))
def get_enabled_plugins():
'''
Returns a list of the enabled plugins
'''
check()
config.reload()
return config.get('plugins')['enabled']
def is_enabled(name):
'''
Return value indicates whether or not the plugin is enabled
'''
return name in get_enabled_plugins()
def get_plugins_folder(name = None, absolute = True):
'''
Returns the path to the plugins folder
'''
path = ''
if name is None:
path = _pluginsfolder
else:
# only allow alphanumeric characters
path = _pluginsfolder + re.sub('[^0-9a-zA-Z]+', '', str(name).lower()) + '/'
if absolute is True:
path = os.path.abspath(path)
return path
def check():
'''
Checks to make sure files exist
'''
config.reload()
if not config.is_set('plugins'):
logger.debug('Generating plugin config data...')
config.set('plugins', {'enabled': []}, True)
if not os.path.exists(os.path.dirname(get_plugins_folder())):
logger.debug('Generating plugin data folder...')
os.path.mkdirs(os.path.dirname(get_plugins_folder()))
return