Move RateLimiter to tfw.util

lib/tfw/components/directory_monitor.py

@@ -1,33 +1,13 @@
-from time import time, sleep
 from watchdog.observers import Observer
 from watchdog.events import FileSystemEventHandler
-from functools import wraps
 
 from tfw.networking.event_handlers.server_connector import ServerUplinkConnector
+from tfw.util import RateLimiter
 
 from tfw.config.logs import logging
 log = logging.getLogger(__name__)
 
 
-class RateLimiter:
-    def __init__(self, rate_per_second):
-        self.min_interval = 1 / float(rate_per_second)
-        self.last_call = time()
-
-    def __call__(self, fun):
-        @wraps(fun)
-        def wrapper(*args, **kwargs):
-            self._limit_rate()
-            fun(*args, **kwargs)
-        return wrapper
-
-    def _limit_rate(self):   #TODO: pls review me :3
-        since_last_call = time() - self.last_call
-        to_next_call = self.min_interval - since_last_call
-        self.last_call = time()
-        if to_next_call > 0:
-            sleep(to_next_call)
-
 
 class WebideReloadEventHandler(FileSystemEventHandler):
     def __init__(self):