from .functions import tell_app


def get():
    return tell_app('System Events', 'get name of current screen saver')


def set(name):
    s = 'set current screen saver to (get screen saver named "%s")' % name
    return tell_app('System Events', s)


def start():
    return tell_app('System Events', 'start current screen saver')


def stop():
    return tell_app('System Events', 'stop current screen saver')


def is_running():
    running = tell_app('System Events', 'running of screen saver preferences')
    return running == 'true'