import dbus
import time
import gobject
import datetime
import dbus.mainloop.glib as glib

class Main():
    def __init__(self):
        dbus_loop = glib.DBusGMainLoop(set_as_default=True)
        bus = dbus.SessionBus(mainloop = dbus_loop)
        screensaver = bus.get_object('org.gnome.ScreenSaver', '/org/gnome/ScreenSaver')
        screensaver.connect_to_signal('ActiveChanged', self.screensaverStatusChanged)
        
        self.bus = bus
        self.audioPlaying = False
        self.lastEvent = datetime.datetime.today()
        self.log('%s boot\n' % time.asctime())
        
        gobject.MainLoop().run()

    def screensaverStatusChanged(self, active):
        now = datetime.datetime.today()
        delta = now - self.lastEvent
        self.lastEvent = now
        
        # log events
        self.log('%s %s %s\n' % (time.asctime(), 'lock  ' if active else 'unlock', delta))
        
        # turn off/on music
        banshee = self.bus.get_object("org.bansheeproject.Banshee", "/org/bansheeproject/Banshee/PlayerEngine")
        if active:
            self.audioPlaying = banshee.GetCurrentState() == 'playing'
            banshee.Pause()
        else:
            if self.audioPlaying:
                banshee.Play()
    
    def log(self, msg):
        pass

if __name__ == "__main__":
    Main()