import os
import stat
import time

# the amount of time, in seconds, before a channel is considered inactive
INACTIVITY_TIME = 3600

# create global variable for message timestamp:
#        Timestamp contains the last time a message of this type was seen
try:
    Timestamp
except NameError:
    # if Timestamp does not exist, define it
    Timestamp = time.time()

# check whether this channel has been inactive
def checkForInactivity():
    global Timestamp
    CurrentTime = time.time()
    Delta = int(CurrentTime - Timestamp)
    if Delta > INACTIVITY_TIME:
       # print warning message - channel has restarted
       LastString = time.strftime( '%Y-%m-%d %H:%M', time.localtime(Timestamp))
       print "IDLE CHANNEL RESTARTED: first message since %s" % LastString
    # update timestamp to the time that this message came through
    Timestamp = CurrentTime