/* Do not remove the headers from this file! see /USAGE for more info. */

/*
** mailbox.c -- mailbox daemon
**
** This daemon will manage the mailboxes in the system.  Each mailbox
** contains a list of message keys that a particular user has in their
** mailbox.  The actual messages are managed by MAIL_D.
**
** Public API:
**   get_mailbox(): return a MAILBOX object for the specified user
**   unload_mailbox(): the specified mailbox is no longer needed; close it
**   close_mailboxes(): close all unneeded mailboxes
**
** 960119, Deathblade: created from code in MAIL_D.
*/

#include <clean_up.h>

private nosave mapping mailboxes = ([ ]);

private nomask void create()
{
    object mailbox;

    foreach ( mailbox in children(MAILBOX) )
    {
	string owner;

	if ( mailbox && (owner = mailbox->query_owner()) )
	    mailboxes[owner] = mailbox;
    }
}

nomask object get_mailbox(string the_owner)
{
    object mailbox;

    if ( !(mailbox = mailboxes[the_owner]) )
    {
	mailbox = mailboxes[the_owner] = new(MAILBOX, the_owner);
	if ( !mailbox )
	    error("mailbox wasn't created");
    }

    return mailbox;
}

nomask void unload_mailbox(string the_owner)
{
    object mailbox;

    if ( mailbox = mailboxes[the_owner] )
    {
        destruct(mailbox);
        map_delete(mailboxes, the_owner);
    }
}

nomask void close_mailboxes()
{
    string * names;
    string name;

    names = keys(mailboxes) - users()->query_userid();
    foreach ( name in names )
    {
	if ( mailboxes[name] )	/* might have been destructed */
	    destruct(mailboxes[name]);

	map_delete(mailboxes, name);
    }
}

// We don't want to disappear, but do some cleaning anyway.
int clean_up() {
    close_mailboxes();
    return ASK_AGAIN;
}