from watchdog.observers import Observer
from watchdog.events import FileSystemEventHandler

from tfw.message_sender import MessageSender


class MessagingEventHandler(FileSystemEventHandler):
    def __init__(self):
        super().__init__()
        self.message_sender = MessageSender()

    def on_modified(self, event):
        self.message_sender.send('Watchdog', 'CECA')


class DirectoryMonitor:
    def __init__(self, directory):
        self.observer = Observer()
        self.observer.schedule(MessagingEventHandler(), directory, recursive=True)

    def watch(self):
        self.observer.start()

    def stop(self):
        self.observer.stop()
        self.observer.join()