/* *****************************************************************************
 * usage/mcs/list.c -- list the elements on the main memory.
 * Copyright (C) 2016-2017 Thomas "Cakeisalie5" Touhey <thomas@touhey.fr>
 *
 * This file is part of libp7.
 * libp7 is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 3.0 of the License,
 * or (at your option) any later version.
 *
 * libp7 is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with libp7; if not, see <http://www.gnu.org/licenses/>.
 * ************************************************************************** */
#include <libp7/internals.h>

/**
 *	p7_mcs_list:
 *	List files on the main memory.
 *
 *	@arg	handle		the libp7 handle.
 *	@arg	callback	the callback.
 *	@arg	cookie		something to send to the callback.
 *	@return				if it worked.
 */

int p7_mcs_list(p7_handle_t *handle, p7_mcslist_t callback, void *cookie)
{
	int err;

	/* make checks */
	chk_handle(handle);
	chk_active(handle);

	/* send command packet */
	log_info("sending file transfer request");
	if ((err = p7_seven_send_cmdmcs_reqallinfo(handle))) {
		log_fatal("couldn't send transfer request");
		return (err);
	} else if (response.type != p7_seven_type_ack) {
		log_fatal("didn't receive ack...");
		return (p7_error_unknown);
	}

	/* swap roles */
	log_info("sending roleswap");
	if ((err = p7_seven_send_swp(handle))) {
		log_fatal("couldn't swap roles");
		return (err);
	}

	/* - Note: we are now in passive mode - */
	g1m_mcshead_t head;
	while (1) switch (response.type) {
		/* if answer is roleswap, we are done */
		case p7_seven_type_swp: return (0);

		/* if it is command, should be another file info */
		case p7_seven_type_cmd:
			/* check args */
			if (g1m_decode_mcsfile_head(&head, response.mcstype,
			  (unsigned char*)response.args[2], (unsigned char*)response.args[0],
			  (unsigned char*)response.args[1], response.filesize))
				continue;
			(*callback)(cookie, &head);

			/* send ack to continue */
			log_info("sending ack to continue");
			if ((err = p7_seven_send_ack(handle, 1))) {
				log_fatal("unable to send ack");
				return (err);
			}
			break;

		default: /* wtf? */
			log_fatal("wtf?!");
			return (p7_error_unknown);
	}
}