/* Copyright (C) 2000-1 drscholl@users.sourceforge.net
   This is free software distributed under the terms of the
   GNU Public License.  See the file COPYING for details.

   $Id: part.c,v 1.22 2001/02/15 08:39:45 drscholl Exp $ */

#include <string.h>
#include "opennap.h"
#include "debug.h"

/* 401 [ :<nick> ] <channel>
 * this function handles the PART(401) command from clients
 */
HANDLER (part)
{
    CHANNEL *chan = 0;
    USER *user;
    char *sender_name;
    char *arg;

    (void) len;
    ASSERT (validate_connection (con));

    if (pop_user_server (con, tag, &pkt, &sender_name, &user) != 0)
	return;
    ASSERT (validate_user (user));

    if (!(arg = next_arg (&pkt)))
    {
	unparsable (con);
	return;
    }

    /* find the requested channel in the user's  list */
    if (!(chan = find_channel (user->channels, arg)))
    {
	if (ISUSER (con))
	    send_cmd (con, MSG_SERVER_NOSUCH,
		    "part channel failed: you are not in that channel");
	else
	    log ("part: %s is not on channel %s (from %s)", user->nick, arg,
		    con->host);
	return;
    }

    /* ack the user */
    if (ISUSER (con))
	send_cmd (con, tag, "%s", chan->name);

    if (!chan->local)
    {
	/* NOTE: we use the MSG_CLIENT_PART(401) message instead of
	   passing MSG_SERVER_PART(407) to pass between servers because we
	   can reuse this same function for both messages easier than
	   implementing support for parsing the latter.  The 401 message
	   will be translated into a 407 for sending to end users. */
	pass_message_args (con, MSG_CLIENT_PART, ":%s %s", user->nick,
		chan->name);
    }

    user->channels = list_delete (user->channels, chan);

    /* remove user from the channel members list and notify local clients */
    part_channel (chan, user);
}