Expose DirManagingEH.directory as a property

lib/tfw/components/directory_monitor.py

@@ -1,5 +1,6 @@
 from watchdog.observers import Observer
 from watchdog.events import FileSystemEventHandler
+from os.path import exists, isdir
 
 from tfw.networking.event_handlers.server_connector import ServerUplinkConnector
 from tfw.components.decorators import RateLimiter
@@ -78,6 +79,15 @@ class DirectoryMonitoringEventHandler(TriggerlessEventHandler):
                          'resume': self.resume,
                          'ignore': self.ignore}
 
+    @property
+    def directory(self):
+        return self._directory
+
+    @directory.setter
+    def directory(self, directory):
+        if not exists(directory) or not isdir(directory): raise EnvironmentError('No such directory!')
+        self._directory = directory
+
     @property
     def monitor(self):
         return self._monitor