source: irc_channel.c @ ad404ab

  /********************************************************************\
  * BitlBee -- An IRC to other IM-networks gateway                     *
  *                                                                    *
  * Copyright 2002-2010 Wilmer van der Gaast and others                *
  \********************************************************************/

/* The IRC-based UI - Representing (virtual) channels.                  */

/*
  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 2 of the License, or
  (at your option) any later version.

  This program 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 General Public License for more details.

  You should have received a copy of the GNU General Public License with
  the Debian GNU/Linux distribution in /usr/share/common-licenses/GPL;
  if not, write to the Free Software Foundation, Inc., 59 Temple Place,
  Suite 330, Boston, MA  02111-1307  USA
*/

#include "bitlbee.h"

static gint irc_channel_user_cmp( gconstpointer a_, gconstpointer b_ );
static const struct irc_channel_funcs control_channel_funcs;
static const struct irc_channel_funcs groupchat_stub_funcs;

irc_channel_t *irc_channel_new( irc_t *irc, const char *name )
{
        irc_channel_t *ic;
        
        if( !irc_channel_name_ok( name ) || irc_channel_by_name( irc, name ) )
                return NULL;
        
        ic = g_new0( irc_channel_t, 1 );
        ic->irc = irc;
        ic->name = g_strdup( name );
        strcpy( ic->mode, CMODE );
        
        irc_channel_add_user( ic, irc->root );
        if( strcmp( set_getstr( &irc->b->set, "ops" ), "both" ) == 0 ||
            strcmp( set_getstr( &irc->b->set, "ops" ), "root" ) == 0 )
                irc_channel_user_set_mode( ic, irc->root, IRC_CHANNEL_USER_OP );
        
        irc->channels = g_slist_prepend( irc->channels, ic );
        
        if( name[0] == '&' )
                ic->f = &control_channel_funcs;
        else /* if( name[0] == '#' ) */
                ic->f = &groupchat_stub_funcs;
        
        if( ic->f->_init )
                if( !ic->f->_init( ic ) )
                {
                        irc_channel_free( ic );
                        return NULL;
                }
        
        return ic;
}

irc_channel_t *irc_channel_by_name( irc_t *irc, const char *name )
{
        GSList *l;
        
        for( l = irc->channels; l; l = l->next )
        {
                irc_channel_t *ic = l->data;
                
                if( name[0] == ic->name[0] && nick_cmp( name + 1, ic->name + 1 ) == 0 )
                        return ic;
        }
        
        return NULL;
}

int irc_channel_free( irc_channel_t *ic )
{
        irc_t *irc = ic->irc;
        
        if( ic->flags & IRC_CHANNEL_JOINED )
                irc_channel_del_user( ic, irc->user );
        
        irc->channels = g_slist_remove( irc->channels, ic );
        while( ic->users )
        {
                g_free( ic->users->data );
                ic->users = g_slist_remove( ic->users, ic->users->data );
        }
        
        g_free( ic->name );
        g_free( ic->topic );
        g_free( ic );
        
        return 1;
}

int irc_channel_add_user( irc_channel_t *ic, irc_user_t *iu )
{
        irc_channel_user_t *icu;
        
        if( irc_channel_has_user( ic, iu ) )
                return 0;
        
        icu = g_new0( irc_channel_user_t, 1 );
        icu->iu = iu;
        
        ic->users = g_slist_insert_sorted( ic->users, icu, irc_channel_user_cmp );
        
        if( iu == ic->irc->user || ic->flags & IRC_CHANNEL_JOINED )
        {
                ic->flags |= IRC_CHANNEL_JOINED;
                irc_send_join( ic, iu );
        }
        
        return 1;
}

int irc_channel_del_user( irc_channel_t *ic, irc_user_t *iu )
{
        irc_channel_user_t *icu;
        
        if( !( icu = irc_channel_has_user( ic, iu ) ) )
                return 0;
        
        ic->users = g_slist_remove( ic->users, icu );
        g_free( icu );
        
        if( ic->flags & IRC_CHANNEL_JOINED )
                irc_send_part( ic, iu, "" );
        
        if( iu == ic->irc->user )
                ic->flags &= ~IRC_CHANNEL_JOINED;
        
        return 1;
}

irc_channel_user_t *irc_channel_has_user( irc_channel_t *ic, irc_user_t *iu )
{
        GSList *l;
        
        for( l = ic->users; l; l = l->next )
        {
                irc_channel_user_t *icu = l->data;
                
                if( icu->iu == iu )
                        return icu;
        }
        
        return NULL;
}

int irc_channel_set_topic( irc_channel_t *ic, const char *topic, const irc_user_t *iu )
{
        g_free( ic->topic );
        ic->topic = g_strdup( topic );
        
        g_free( ic->topic_who );
        if( iu )
                ic->topic_who = g_strdup_printf( "%s!%s@%s", iu->nick, iu->user, iu->host );
        else
                ic->topic_who = NULL;
        
        ic->topic_time = time( NULL );
        
        if( ic->flags & IRC_CHANNEL_JOINED )
                irc_send_topic( ic, TRUE );
        
        return 1;
}

void irc_channel_user_set_mode( irc_channel_t *ic, irc_user_t *iu, irc_channel_user_flags_t flags )
{
        irc_channel_user_t *icu = irc_channel_has_user( ic, iu );
        
        if( icu->flags == flags )
                return;
        
        if( ic->flags & IRC_CHANNEL_JOINED )
                irc_send_channel_user_mode_diff( ic, iu, icu->flags, flags );
        
        icu->flags = flags;
}

void irc_channel_printf( irc_channel_t *ic, char *format, ... )
{
        va_list params;
        char *text;
        
        va_start( params, format );
        text = g_strdup_vprintf( format, params );
        va_end( params );
        
        irc_send_msg( ic->irc->root, "PRIVMSG", ic->name, text, NULL );
        g_free( text );
}

gboolean irc_channel_name_ok( const char *name )
{
        char name_[strlen(name)+1];
        
        /* Check if the first character is in CTYPES (#&) */
        if( strchr( CTYPES, name[0] ) == NULL )
                return FALSE;
        
        /* Check the rest of the name. Just checking name + 1 doesn't work
           since it will fail if the first character is a number, or if
           it's a one-char channel name - both of which are legal. */
        name_[0] = '_';
        strcpy( name_ + 1, name + 1 );
        return nick_ok( name_ );
}

static gint irc_channel_user_cmp( gconstpointer a_, gconstpointer b_ )
{
        const irc_channel_user_t *a = a_, *b = b_;
        
        return irc_user_cmp( a->iu, b->iu );
}

/* Channel-type dependent functions, for control channels: */
static gboolean control_channel_privmsg( irc_channel_t *ic, const char *msg )
{
        irc_t *irc = ic->irc;
        const char *s;
        
        /* Scan for non-whitespace chars followed by a colon: */
        for( s = msg; *s && !isspace( *s ) && *s != ':' && *s != ','; s ++ ) {}
        
        if( *s == ':' || *s == ',' )
        {
                char to[s-msg+1];
                irc_user_t *iu;
                
                memset( to, 0, sizeof( to ) );
                strncpy( to, msg, s - msg );
                while( *(++s) && isspace( *s ) ) {}
                
                iu = irc_user_by_name( irc, to );
                if( iu && iu->f->privmsg )
                {
                        iu->flags &= ~IRC_USER_PRIVATE;
                        iu->f->privmsg( iu, s );
                }
                else
                {
                        irc_channel_printf( ic, "User does not exist: %s", to );
                }
        }
        else
        {
                /* TODO: Maybe just use root->privmsg here now? */
                char cmd[strlen(msg)+1];
                
                g_free( ic->irc->last_root_cmd );
                ic->irc->last_root_cmd = g_strdup( ic->name );
                
                strcpy( cmd, msg );
                root_command_string( ic->irc, cmd );
        }
        
        return TRUE;
}

static gboolean control_channel_init( irc_channel_t *ic )
{
        struct irc_control_channel *icc;
        
        ic->data = icc = g_new0( struct irc_control_channel, 1 );
        icc->type = IRC_CC_TYPE_DEFAULT;
        
        if( ( icc->group = bee_group_by_name( ic->irc->b, ic->name + 1, FALSE ) ) )
                icc->type = IRC_CC_TYPE_GROUP;
        else if( ( icc->account = account_get( ic->irc->b, ic->name + 1 ) ) )
                icc->type = IRC_CC_TYPE_ACCOUNT;
        
        bee_irc_channel_update( ic->irc, ic, NULL );
        
        return TRUE;
}

static const struct irc_channel_funcs control_channel_funcs = {
        control_channel_privmsg,
        NULL,
        NULL,
        NULL,
        NULL,
        
        control_channel_init,
};

/* Groupchat stub: Only handles /INVITE at least for now. */
static gboolean groupchat_stub_invite( irc_channel_t *ic, irc_user_t *iu )
{
        bee_user_t *bu = iu->bu;
        
        if( iu->bu->ic->acc->prpl->chat_with )
        {
                ic->flags |= IRC_CHANNEL_CHAT_PICKME;
                iu->bu->ic->acc->prpl->chat_with( bu->ic, bu->handle );
                ic->flags &= ~IRC_CHANNEL_CHAT_PICKME;
                return TRUE;
        }
        else
        {
                irc_send_num( ic->irc, 482, "%s :IM protocol does not support room invitations", ic->name );
                return FALSE;
        }
}

static const struct irc_channel_funcs groupchat_stub_funcs = {
        NULL,
        NULL,
        NULL,
        NULL,
        groupchat_stub_invite,
};