mirror of
https://github.com/avatao-content/baseimage-tutorial-framework
synced 2024-11-06 00:11:22 +00:00
132 lines
3.8 KiB
Python
132 lines
3.8 KiB
Python
from watchdog.observers import Observer
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from watchdog.events import FileSystemEventHandler
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from os.path import exists, isdir
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from tfw.networking.event_handlers.server_connector import ServerUplinkConnector
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from tfw.components.decorators import RateLimiter
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from tfw.event_handler_base import TriggerlessEventHandler
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from tfw.config.logs import logging
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log = logging.getLogger(__name__)
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class WebideReloadEventHandler(FileSystemEventHandler):
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def __init__(self):
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super().__init__()
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self.uplink = ServerUplinkConnector()
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self._paused = False
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self.ignore = 0
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def pause(self):
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self._paused = True
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def resume(self):
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self._paused = False
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@RateLimiter(rate_per_second=5)
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def on_modified(self, event):
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if self._paused: return
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if self.ignore > 0:
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self.ignore = self.ignore - 1
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return
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log.debug(event)
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key = 'webide'
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self.uplink.send(key, {'data': {'command': 'reload'}})
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class DirectoryMonitor:
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def __init__(self, directory):
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self.observer = Observer()
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self.eventhandler = WebideReloadEventHandler()
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self.observer.schedule(self.eventhandler, directory, recursive=True)
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self.pause, self.resume = self.eventhandler.pause, self.eventhandler.resume
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def watch(self):
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self.observer.start()
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def stop(self):
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self.observer.stop()
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self.observer.join()
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@property
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def ignore(self):
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return self.eventhandler.ignore
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@ignore.setter
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def ignore(self, value):
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self.eventhandler.ignore = value if value >= 0 else 0
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@property
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def pauser(self):
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return DirectoryMonitor.Pauser(self)
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class Pauser:
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def __init__(self, directory_monitor):
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self.directorymonitor = directory_monitor
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def __enter__(self):
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self.directorymonitor.pause()
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def __exit__(self, exc_type, exc_val, exc_tb):
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self.directorymonitor.resume()
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class DirectoryMonitoringEventHandler(TriggerlessEventHandler):
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def __init__(self, key, directory):
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super().__init__(key)
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self._directory = directory
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self._monitor = None
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self.reload_monitor()
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self.commands = {'pause': self.pause,
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'resume': self.resume,
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'ignore': self.ignore,
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'selectdir': self.selectdir}
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@property
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def directory(self):
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return self._directory
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@directory.setter
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def directory(self, directory):
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if not exists(directory) or not isdir(directory): raise EnvironmentError('No such directory!')
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self._directory = directory
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@property
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def monitor(self):
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return self._monitor
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def reload_monitor(self):
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if self._monitor:
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try: self._monitor.stop()
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except KeyError: logging.debug('Working directory was removed – ignoring...')
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self._monitor = DirectoryMonitor(self._directory)
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self._monitor.watch() # This runs on a separate thread
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def handle_event(self, key, message):
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try:
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message['data'] = self.commands[message['data']['command']](message['data'])
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return message
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except KeyError:
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log.error('IGNORING MESSAGE: Invalid message received: {}'.format(message))
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def pause(self, data):
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self.monitor.pause()
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return data
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def resume(self, data):
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self.monitor.resume()
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return data
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def ignore(self, data):
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self.monitor.ignore += data['ignore']
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return data
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def selectdir(self, data):
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try:
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self.directory = data['directory']
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self.reload_monitor()
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return data
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except EnvironmentError:
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log.error('DirManagingEH failed to switch directory!')
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def cleanup(self):
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self.monitor.stop()
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