'''
autosave.py

automatically save all existing PCs, every 5 mins. Extract those that are
linkdead.
'''
import char, event, mudsys

# Get the autosave delay from settings, or, you know... not.
try:
    AUTOSAVE_DELAY = int(mudsys.sys_getval('AUTOSAVE_DELAY'))
except:
    AUTOSAVE_DELAY = 300

## State
scheduled = False

## The Event
def autosave(owner, data, arg):
    ''' Iterate through every character in the game, saving any player
        characters and forcing link-dead player characters to quit. '''
    global scheduled
    if not scheduled:
        return

    for ch in char.char_list():
        if ch.is_npc:
            continue

        try:
            # Save characters.
            mudsys.do_save(ch)

            # Quit link-dead characters.
            if ch.sock is None:
                mudsys.do_quit(ch)
        except:
            pass

    if AUTOSAVE_DELAY > 0 and owner is not cmd_autosave:
        event.start_event(None, AUTOSAVE_DELAY, autosave)
    else:
        scheduled = False

## State Stuff
def start():
    global scheduled

    if scheduled or AUTOSAVE_DELAY == 0:
        return

    scheduled = True
    event.start_event(None, AUTOSAVE_DELAY, autosave)

def stop():
    global scheduled
    scheduled = False

## The Command
def cmd_autosave(ch, cmd, arg):
    ''' Usage: autosave <value|now>

        Change the autosave delay, which defaults to 300. If you specify a
        value, that value will be used in the future. Specify 0 to disable
        autosaving. If you supply the word 'now' instead of a numeric value,
        an autosave will be carried out immediately. '''
    global AUTOSAVE_DELAY

    if not arg:
        if not AUTOSAVE_DELAY:
            ch.send("Autosave is currently disabled.")
        else:
            ch.send("Characters will automatically be saved every %d seconds."%\
                AUTOSAVE_DELAY)
        return

    if arg.lower() == 'now':
        autosave(cmd_autosave, None, None)
        return

    try:
        arg = int(arg)
    except:
        ch.send("Invalid value! The value must be an integer or 'now'.")
        return

    mudsys.sys_setval('AUTOSAVE_DELAY', str(arg))
    AUTOSAVE_DELAY = arg

    if AUTOSAVE_DELAY and not scheduled:
        start()


## Initialization
mudsys.add_cmd("autosave", None, cmd_autosave, "admin", False)
start()