source: protocols/nogaim.c @ f8cb76d

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

/*
 * nogaim
 *
 * Gaim without gaim - for BitlBee
 *
 * This file contains functions called by the Gaim IM-modules. It's written
 * from scratch for BitlBee and doesn't contain any code from Gaim anymore
 * (except for the function names).
 */

/*
  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
*/

#define BITLBEE_CORE
#include <ctype.h>

#include "nogaim.h"
#include "chat.h"

static int remove_chat_buddy_silent( struct groupchat *b, const char *handle );
static char *format_timestamp( irc_t *irc, time_t msg_ts );

GSList *connections;

#ifdef WITH_PLUGINS
gboolean load_plugin(char *path)
{
        void (*init_function) (void);
        
        GModule *mod = g_module_open(path, G_MODULE_BIND_LAZY);

        if(!mod) {
                log_message(LOGLVL_ERROR, "Can't find `%s', not loading (%s)\n", path, g_module_error());
                return FALSE;
        }

        if(!g_module_symbol(mod,"init_plugin",(gpointer *) &init_function)) {
                log_message(LOGLVL_WARNING, "Can't find function `init_plugin' in `%s'\n", path);
                return FALSE;
        }

        init_function();

        return TRUE;
}

void load_plugins(void)
{
        GDir *dir;
        GError *error = NULL;

        dir = g_dir_open(global.conf->plugindir, 0, &error);

        if (dir) {
                const gchar *entry;
                char *path;

                while ((entry = g_dir_read_name(dir))) {
                        path = g_build_filename(global.conf->plugindir, entry, NULL);
                        if(!path) {
                                log_message(LOGLVL_WARNING, "Can't build path for %s\n", entry);
                                continue;
                        }

                        load_plugin(path);

                        g_free(path);
                }

                g_dir_close(dir);
        }
}
#endif

/* nogaim.c */

GList *protocols = NULL;
  
void register_protocol (struct prpl *p)
{
        int i;
        gboolean refused = global.conf->protocols != NULL;
 
        for (i = 0; global.conf->protocols && global.conf->protocols[i]; i++)
        {
                if (g_strcasecmp(p->name, global.conf->protocols[i]) == 0)
                        refused = FALSE;
        }

        if (refused)
                log_message(LOGLVL_WARNING, "Protocol %s disabled\n", p->name);
        else
                protocols = g_list_append(protocols, p);
}

struct prpl *find_protocol(const char *name)
{
        GList *gl;
        for (gl = protocols; gl; gl = gl->next) 
        {
                struct prpl *proto = gl->data;
                if(!g_strcasecmp(proto->name, name)) 
                        return proto;
        }
        return NULL;
}

/* nogaim.c */
void nogaim_init()
{
        extern void msn_initmodule();
        extern void oscar_initmodule();
        extern void byahoo_initmodule();
        extern void jabber_initmodule();
        extern void twitter_initmodule();

#ifdef WITH_MSN
        msn_initmodule();
#endif

#ifdef WITH_OSCAR
        oscar_initmodule();
#endif
        
#ifdef WITH_YAHOO
        byahoo_initmodule();
#endif
        
#ifdef WITH_JABBER
        jabber_initmodule();
#endif

#ifdef WITH_TWITTER
        twitter_initmodule();
#endif

#ifdef WITH_PLUGINS
        load_plugins();
#endif
}

GSList *get_connections() { return connections; }

/* multi.c */

struct im_connection *imcb_new( account_t *acc )
{
        struct im_connection *ic;
        
        ic = g_new0( struct im_connection, 1 );
        
        ic->irc = acc->irc;
        ic->acc = acc;
        acc->ic = ic;
        
        connections = g_slist_append( connections, ic );
        
        return( ic );
}

void imc_free( struct im_connection *ic )
{
        account_t *a;
        
        /* Destroy the pointer to this connection from the account list */
        for( a = ic->irc->accounts; a; a = a->next )
                if( a->ic == ic )
                {
                        a->ic = NULL;
                        break;
                }
        
        connections = g_slist_remove( connections, ic );
        g_free( ic );
}

static void serv_got_crap( struct im_connection *ic, char *format, ... )
{
        va_list params;
        char *text;
        account_t *a;
        
        va_start( params, format );
        text = g_strdup_vprintf( format, params );
        va_end( params );

        if( ( g_strcasecmp( set_getstr( &ic->irc->set, "strip_html" ), "always" ) == 0 ) ||
            ( ( ic->flags & OPT_DOES_HTML ) && set_getbool( &ic->irc->set, "strip_html" ) ) )
                strip_html( text );
        
        /* Try to find a different connection on the same protocol. */
        for( a = ic->irc->accounts; a; a = a->next )
                if( a->prpl == ic->acc->prpl && a->ic != ic )
                        break;
        
        /* If we found one, include the screenname in the message. */
        if( a )
                irc_usermsg( ic->irc, "%s(%s) - %s", ic->acc->prpl->name, ic->acc->user, text );
        else
                irc_usermsg( ic->irc, "%s - %s", ic->acc->prpl->name, text );
        
        g_free( text );
}

void imcb_log( struct im_connection *ic, char *format, ... )
{
        va_list params;
        char *text;
        
        va_start( params, format );
        text = g_strdup_vprintf( format, params );
        va_end( params );
        
        if( ic->flags & OPT_LOGGED_IN )
                serv_got_crap( ic, "%s", text );
        else
                serv_got_crap( ic, "Logging in: %s", text );
        
        g_free( text );
}

void imcb_error( struct im_connection *ic, char *format, ... )
{
        va_list params;
        char *text;
        
        va_start( params, format );
        text = g_strdup_vprintf( format, params );
        va_end( params );
        
        if( ic->flags & OPT_LOGGED_IN )
                serv_got_crap( ic, "Error: %s", text );
        else
                serv_got_crap( ic, "Couldn't log in: %s", text );
        
        g_free( text );
}

static gboolean send_keepalive( gpointer d, gint fd, b_input_condition cond )
{
        struct im_connection *ic = d;
        
        if( ic->acc->prpl->keepalive )
                ic->acc->prpl->keepalive( ic );
        
        return TRUE;
}

void imcb_connected( struct im_connection *ic )
{
        irc_t *irc = ic->irc;
        struct chat *c;
        user_t *u;
        
        /* MSN servers sometimes redirect you to a different server and do
           the whole login sequence again, so these "late" calls to this
           function should be handled correctly. (IOW, ignored) */
        if( ic->flags & OPT_LOGGED_IN )
                return;
        
        u = user_find( ic->irc, ic->irc->nick );
        
        imcb_log( ic, "Logged in" );
        
        ic->keepalive = b_timeout_add( 60000, send_keepalive, ic );
        ic->flags |= OPT_LOGGED_IN;
        
        /* Necessary to send initial presence status, even if we're not away. */
        imc_away_send_update( ic );
        
        /* Apparently we're connected successfully, so reset the
           exponential backoff timer. */
        ic->acc->auto_reconnect_delay = 0;
        
        for( c = irc->chatrooms; c; c = c->next )
        {
                if( c->acc != ic->acc )
                        continue;
                
                if( set_getbool( &c->set, "auto_join" ) )
                        chat_join( irc, c, NULL );
        }
}

gboolean auto_reconnect( gpointer data, gint fd, b_input_condition cond )
{
        account_t *a = data;
        
        a->reconnect = 0;
        account_on( a->irc, a );
        
        return( FALSE );        /* Only have to run the timeout once */
}

void cancel_auto_reconnect( account_t *a )
{
        b_event_remove( a->reconnect );
        a->reconnect = 0;
}

void imc_logout( struct im_connection *ic, int allow_reconnect )
{
        irc_t *irc = ic->irc;
        user_t *t, *u;
        account_t *a;
        int delay;
        
        /* Nested calls might happen sometimes, this is probably the best
           place to catch them. */
        if( ic->flags & OPT_LOGGING_OUT )
                return;
        else
                ic->flags |= OPT_LOGGING_OUT;
        
        imcb_log( ic, "Signing off.." );
        
        b_event_remove( ic->keepalive );
        ic->keepalive = 0;
        ic->acc->prpl->logout( ic );
        b_event_remove( ic->inpa );
        
        g_free( ic->away );
        ic->away = NULL;
        
        u = irc->users;
        while( u )
        {
                if( u->ic == ic )
                {
                        t = u->next;
                        user_del( irc, u->nick );
                        u = t;
                }
                else
                        u = u->next;
        }
        
        query_del_by_conn( ic->irc, ic );
        
        for( a = irc->accounts; a; a = a->next )
                if( a->ic == ic )
                        break;
        
        if( !a )
        {
                /* Uhm... This is very sick. */
        }
        else if( allow_reconnect && set_getbool( &irc->set, "auto_reconnect" ) &&
                 set_getbool( &a->set, "auto_reconnect" ) &&
                 ( delay = account_reconnect_delay( a ) ) > 0 )
        {
                imcb_log( ic, "Reconnecting in %d seconds..", delay );
                a->reconnect = b_timeout_add( delay * 1000, auto_reconnect, a );
        }
        
        imc_free( ic );
}


/* dialogs.c */

void imcb_ask( struct im_connection *ic, char *msg, void *data,
               query_callback doit, query_callback dont )
{
        query_add( ic->irc, ic, msg, doit, dont, data );
}


/* list.c */

void imcb_add_buddy( struct im_connection *ic, const char *handle, const char *group )
{
        user_t *u;
        char nick[MAX_NICK_LENGTH+1], *s;
        irc_t *irc = ic->irc;
        
        if( user_findhandle( ic, handle ) )
        {
                if( set_getbool( &irc->set, "debug" ) )
                        imcb_log( ic, "User already exists, ignoring add request: %s", handle );
                
                return;
                
                /* Buddy seems to exist already. Let's ignore this request then...
                   Eventually subsequent calls to this function *should* be possible
                   when a buddy is in multiple groups. But for now BitlBee doesn't
                   even support groups so let's silently ignore this for now. */
        }
        
        memset( nick, 0, MAX_NICK_LENGTH + 1 );
        strcpy( nick, nick_get( ic->acc, handle ) );
        
        u = user_add( ic->irc, nick );
        
//      if( !realname || !*realname ) realname = nick;
//      u->realname = g_strdup( realname );
        
        if( ( s = strchr( handle, '@' ) ) )
        {
                u->host = g_strdup( s + 1 );
                u->user = g_strndup( handle, s - handle );
        }
        else if( ic->acc->server )
        {
                u->host = g_strdup( ic->acc->server );
                u->user = g_strdup( handle );
                
                /* s/ /_/ ... important for AOL screennames */
                for( s = u->user; *s; s ++ )
                        if( *s == ' ' )
                                *s = '_';
        }
        else
        {
                u->host = g_strdup( ic->acc->prpl->name );
                u->user = g_strdup( handle );
        }
        
        u->ic = ic;
        u->handle = g_strdup( handle );
        if( group ) u->group = g_strdup( group );
        u->send_handler = buddy_send_handler;
        u->last_typing_notice = 0;
}

struct buddy *imcb_find_buddy( struct im_connection *ic, char *handle )
{
        static struct buddy b[1];
        user_t *u;
        
        u = user_findhandle( ic, handle );
        
        if( !u )
                return( NULL );
        
        memset( b, 0, sizeof( b ) );
        strncpy( b->name, handle, 80 );
        strncpy( b->show, u->realname, BUDDY_ALIAS_MAXLEN );
        b->present = u->online;
        b->ic = u->ic;
        
        return( b );
}

void imcb_rename_buddy( struct im_connection *ic, const char *handle, const char *realname )
{
        user_t *u = user_findhandle( ic, handle );
        char *set;
        
        if( !u || !realname ) return;
        
        if( g_strcasecmp( u->realname, realname ) != 0 )
        {
                if( u->realname != u->nick ) g_free( u->realname );
                
                u->realname = g_strdup( realname );
                
                if( ( ic->flags & OPT_LOGGED_IN ) && set_getbool( &ic->irc->set, "display_namechanges" ) )
                        imcb_log( ic, "User `%s' changed name to `%s'", u->nick, u->realname );
        }
        
        set = set_getstr( &ic->acc->set, "nick_source" );
        if( strcmp( set, "handle" ) != 0 )
        {
                char *name = g_strdup( realname );
                
                if( strcmp( set, "first_name" ) == 0 )
                {
                        int i;
                        for( i = 0; name[i] && !isspace( name[i] ); i ++ ) {}
                        name[i] = '\0';
                }
                
                imcb_buddy_nick_hint( ic, handle, name );
                
                g_free( name );
        }
}

void imcb_remove_buddy( struct im_connection *ic, const char *handle, char *group )
{
        user_t *u;
        
        if( ( u = user_findhandle( ic, handle ) ) )
                user_del( ic->irc, u->nick );
}

/* Mainly meant for ICQ (and now also for Jabber conferences) to allow IM
   modules to suggest a nickname for a handle. */
void imcb_buddy_nick_hint( struct im_connection *ic, const char *handle, const char *nick )
{
        user_t *u = user_findhandle( ic, handle );
        char newnick[MAX_NICK_LENGTH+1], *orig_nick;
        
        if( u && !u->online && !nick_saved( ic->acc, handle ) )
        {
                /* Only do this if the person isn't online yet (which should
                   be the case if we just added it) and if the user hasn't
                   assigned a nickname to this buddy already. */
                
                strncpy( newnick, nick, MAX_NICK_LENGTH );
                newnick[MAX_NICK_LENGTH] = 0;
                
                /* Some processing to make sure this string is a valid IRC nickname. */
                nick_strip( newnick );
                if( set_getbool( &ic->irc->set, "lcnicks" ) )
                        nick_lc( newnick );
                
                if( strcmp( u->nick, newnick ) != 0 )
                {
                        /* Only do this if newnick is different from the current one.
                           If rejoining a channel, maybe we got this nick already
                           (and dedupe would only add an underscore. */
                        nick_dedupe( ic->acc, handle, newnick );
                        
                        /* u->nick will be freed halfway the process, so it can't be
                           passed as an argument. */
                        orig_nick = g_strdup( u->nick );
                        user_rename( ic->irc, orig_nick, newnick );
                        g_free( orig_nick );
                }
        }
}


struct imcb_ask_cb_data
{
        struct im_connection *ic;
        char *handle;
};

static void imcb_ask_auth_cb_no( void *data )
{
        struct imcb_ask_cb_data *cbd = data;
        
        cbd->ic->acc->prpl->auth_deny( cbd->ic, cbd->handle );
        
        g_free( cbd->handle );
        g_free( cbd );
}

static void imcb_ask_auth_cb_yes( void *data )
{
        struct imcb_ask_cb_data *cbd = data;
        
        cbd->ic->acc->prpl->auth_allow( cbd->ic, cbd->handle );
        
        g_free( cbd->handle );
        g_free( cbd );
}

void imcb_ask_auth( struct im_connection *ic, const char *handle, const char *realname )
{
        struct imcb_ask_cb_data *data = g_new0( struct imcb_ask_cb_data, 1 );
        char *s, *realname_ = NULL;
        
        if( realname != NULL )
                realname_ = g_strdup_printf( " (%s)", realname );
        
        s = g_strdup_printf( "The user %s%s wants to add you to his/her buddy list.",
                             handle, realname_ ?: "" );
        
        g_free( realname_ );
        
        data->ic = ic;
        data->handle = g_strdup( handle );
        query_add( ic->irc, ic, s, imcb_ask_auth_cb_yes, imcb_ask_auth_cb_no, data );
}


static void imcb_ask_add_cb_no( void *data )
{
        g_free( ((struct imcb_ask_cb_data*)data)->handle );
        g_free( data );
}

static void imcb_ask_add_cb_yes( void *data )
{
        struct imcb_ask_cb_data *cbd = data;
        
        cbd->ic->acc->prpl->add_buddy( cbd->ic, cbd->handle, NULL );
        
        return imcb_ask_add_cb_no( data );
}

void imcb_ask_add( struct im_connection *ic, const char *handle, const char *realname )
{
        struct imcb_ask_cb_data *data = g_new0( struct imcb_ask_cb_data, 1 );
        char *s;
        
        /* TODO: Make a setting for this! */
        if( user_findhandle( ic, handle ) != NULL )
                return;
        
        s = g_strdup_printf( "The user %s is not in your buddy list yet. Do you want to add him/her now?", handle );
        
        data->ic = ic;
        data->handle = g_strdup( handle );
        query_add( ic->irc, ic, s, imcb_ask_add_cb_yes, imcb_ask_add_cb_no, data );
}


/* server.c */                    

void imcb_buddy_status( struct im_connection *ic, const char *handle, int flags, const char *state, const char *message )
{
        user_t *u;
        int oa, oo;
        
        u = user_findhandle( ic, (char*) handle );
        
        if( !u )
        {
                if( g_strcasecmp( set_getstr( &ic->irc->set, "handle_unknown" ), "add" ) == 0 )
                {
                        imcb_add_buddy( ic, (char*) handle, NULL );
                        u = user_findhandle( ic, (char*) handle );
                }
                else
                {
                        if( set_getbool( &ic->irc->set, "debug" ) || g_strcasecmp( set_getstr( &ic->irc->set, "handle_unknown" ), "ignore" ) != 0 )
                        {
                                imcb_log( ic, "imcb_buddy_status() for unknown handle %s:", handle );
                                imcb_log( ic, "flags = %d, state = %s, message = %s", flags,
                                          state ? state : "NULL", message ? message : "NULL" );
                        }
                        
                        return;
                }
        }
        
        oa = u->away != NULL;
        oo = u->online;
        
        g_free( u->away );
        g_free( u->status_msg );
        u->away = u->status_msg = NULL;
        
        if( set_getbool( &ic->irc->set, "show_offline" ) && !u->online )
        {
                /* always set users as online */
                irc_spawn( ic->irc, u );
                u->online = 1;
                if( !( flags & OPT_LOGGED_IN ) )
                {
                        /* set away message if user isn't really online */
                        u->away = g_strdup( "User is offline" );
                }
        }
        else if( ( flags & OPT_LOGGED_IN ) && !u->online )
        {
                irc_spawn( ic->irc, u );
                u->online = 1;
        }
        else if( !( flags & OPT_LOGGED_IN ) && u->online )
        {
                struct groupchat *c;
                
                if( set_getbool( &ic->irc->set, "show_offline" ) )
                {
                        /* keep offline users in channel and set away message to "offline" */
                        u->away = g_strdup( "User is offline" );

                        /* Keep showing him/her in the control channel but not in groupchats. */
                        for( c = ic->groupchats; c; c = c->next )
                        {
                                if( remove_chat_buddy_silent( c, handle ) && c->joined )
                                        irc_part( c->ic->irc, u, c->channel );
                        }
                }
                else
                {
                        /* kill offline users */
                        irc_kill( ic->irc, u );
                        u->online = 0;

                        /* Remove him/her from the groupchats to prevent PART messages after he/she QUIT already */
                        for( c = ic->groupchats; c; c = c->next )
                                remove_chat_buddy_silent( c, handle );
                }
        }

        if( flags & OPT_AWAY )
        {
                if( state && message )
                {
                        u->away = g_strdup_printf( "%s (%s)", state, message );
                }
                else if( state )
                {
                        u->away = g_strdup( state );
                }
                else if( message )
                {
                        u->away = g_strdup( message );
                }
                else
                {
                        u->away = g_strdup( "Away" );
                }
        }
        else
        {
                u->status_msg = g_strdup( message );
        }
        
        /* early if-clause for show_offline even if there is some redundant code here because this isn't LISP but C ;) */
        if( set_getbool( &ic->irc->set, "show_offline" ) && set_getbool( &ic->irc->set, "away_devoice" ) )
        {
                char *from;
                
                if( set_getbool( &ic->irc->set, "simulate_netsplit" ) )
                {
                        from = g_strdup( ic->irc->myhost );
                }
                else
                {
                        from = g_strdup_printf( "%s!%s@%s", ic->irc->mynick, ic->irc->mynick,
                                                            ic->irc->myhost );
                }

                /* if we use show_offline, we op online users, voice away users, and devoice/deop offline users */
                if( flags & OPT_LOGGED_IN )
                {
                        /* user is "online" (either really online or away) */
                        irc_write( ic->irc, ":%s MODE %s %cv%co %s %s", from, ic->irc->channel,
                                                                  u->away?'+':'-', u->away?'-':'+', u->nick, u->nick );
                }
                else
                {
                        /* user is offline */
                        irc_write( ic->irc, ":%s MODE %s -vo %s %s", from, ic->irc->channel, u->nick, u->nick );
                }
        }
        else
        { 
                /* LISPy... */
                if( ( set_getbool( &ic->irc->set, "away_devoice" ) ) &&         /* Don't do a thing when user doesn't want it */
                    ( u->online ) &&                                            /* Don't touch offline people */
                    ( ( ( u->online != oo ) && !u->away ) ||                    /* Voice joining people */
                      ( ( u->online == oo ) && ( oa == !u->away ) ) ) )         /* (De)voice people changing state */
                {
                        char *from;

                        if( set_getbool( &ic->irc->set, "simulate_netsplit" ) )
                        {
                                from = g_strdup( ic->irc->myhost );
                        }
                        else
                        {
                                from = g_strdup_printf( "%s!%s@%s", ic->irc->mynick, ic->irc->mynick,
                                                                    ic->irc->myhost );
                        }
                        irc_write( ic->irc, ":%s MODE %s %cv %s", from, ic->irc->channel,
                                                                  u->away?'-':'+', u->nick );
                        g_free( from );
                }
        }
}

void imcb_buddy_msg( struct im_connection *ic, const char *handle, char *msg, uint32_t flags, time_t sent_at )
{
        irc_t *irc = ic->irc;
        char *wrapped, *ts = NULL;
        user_t *u;
        
        u = user_findhandle( ic, handle );
        
        if( !u )
        {
                char *h = set_getstr( &irc->set, "handle_unknown" );
                
                if( g_strcasecmp( h, "ignore" ) == 0 )
                {
                        if( set_getbool( &irc->set, "debug" ) )
                                imcb_log( ic, "Ignoring message from unknown handle %s", handle );
                        
                        return;
                }
                else if( g_strncasecmp( h, "add", 3 ) == 0 )
                {
                        int private = set_getbool( &irc->set, "private" );
                        
                        if( h[3] )
                        {
                                if( g_strcasecmp( h + 3, "_private" ) == 0 )
                                        private = 1;
                                else if( g_strcasecmp( h + 3, "_channel" ) == 0 )
                                        private = 0;
                        }
                        
                        imcb_add_buddy( ic, handle, NULL );
                        u = user_findhandle( ic, handle );
                        u->is_private = private;
                }
                else
                {
                        imcb_log( ic, "Message from unknown handle %s:", handle );
                        u = user_find( irc, irc->mynick );
                }
        }
        
        if( ( g_strcasecmp( set_getstr( &ic->irc->set, "strip_html" ), "always" ) == 0 ) ||
            ( ( ic->flags & OPT_DOES_HTML ) && set_getbool( &ic->irc->set, "strip_html" ) ) )
                strip_html( msg );
        
        if( set_getbool( &ic->irc->set, "display_timestamps" ) &&
            ( ts = format_timestamp( irc, sent_at ) ) )
        {
                char *new = g_strconcat( ts, msg, NULL );
                g_free( ts );
                ts = msg = new;
        }
        
        wrapped = word_wrap( msg, 425 );
        irc_msgfrom( irc, u->nick, wrapped );
        g_free( wrapped );
        g_free( ts );
}

void imcb_buddy_typing( struct im_connection *ic, char *handle, uint32_t flags )
{
        user_t *u;
        
        if( !set_getbool( &ic->irc->set, "typing_notice" ) )
                return;
        
        if( ( u = user_findhandle( ic, handle ) ) )
        {
                char buf[256]; 
                
                g_snprintf( buf, 256, "\1TYPING %d\1", ( flags >> 8 ) & 3 );
                irc_privmsg( ic->irc, u, "PRIVMSG", ic->irc->nick, NULL, buf );
        }
}

struct groupchat *imcb_chat_new( struct im_connection *ic, const char *handle )
{
        struct groupchat *c;
        
        /* This one just creates the conversation structure, user won't see anything yet */
        
        if( ic->groupchats )
        {
                for( c = ic->groupchats; c->next; c = c->next );
                c = c->next = g_new0( struct groupchat, 1 );
        }
        else
                ic->groupchats = c = g_new0( struct groupchat, 1 );
        
        c->ic = ic;
        c->title = g_strdup( handle );
        c->channel = g_strdup_printf( "&chat_%03d", ic->irc->c_id++ );
        c->topic = g_strdup_printf( "BitlBee groupchat: \"%s\". Please keep in mind that root-commands won't work here. Have fun!", c->title );
        
        if( set_getbool( &ic->irc->set, "debug" ) )
                imcb_log( ic, "Creating new conversation: (id=%p,handle=%s)", c, handle );
        
        return c;
}

void imcb_chat_name_hint( struct groupchat *c, const char *name )
{
        if( !c->joined )
        {
                struct im_connection *ic = c->ic;
                char stripped[MAX_NICK_LENGTH+1], *full_name;
                
                strncpy( stripped, name, MAX_NICK_LENGTH );
                stripped[MAX_NICK_LENGTH] = '\0';
                nick_strip( stripped );
                if( set_getbool( &ic->irc->set, "lcnicks" ) )
                        nick_lc( stripped );
                
                full_name = g_strdup_printf( "&%s", stripped );
                
                if( stripped[0] &&
                    nick_cmp( stripped, ic->irc->channel + 1 ) != 0 &&
                    irc_chat_by_channel( ic->irc, full_name ) == NULL )
                {
                        g_free( c->channel );
                        c->channel = full_name;
                }
                else
                {
                        g_free( full_name );
                }
        }
}

void imcb_chat_free( struct groupchat *c )
{
        struct im_connection *ic = c->ic;
        struct groupchat *l;
        GList *ir;
        
        if( set_getbool( &ic->irc->set, "debug" ) )
                imcb_log( ic, "You were removed from conversation %p", c );
        
        if( c )
        {
                if( c->joined )
                {
                        user_t *u, *r;
                        
                        r = user_find( ic->irc, ic->irc->mynick );
                        irc_privmsg( ic->irc, r, "PRIVMSG", c->channel, "", "Cleaning up channel, bye!" );
                        
                        u = user_find( ic->irc, ic->irc->nick );
                        irc_kick( ic->irc, u, c->channel, r );
                        /* irc_part( ic->irc, u, c->channel ); */
                }
                
                /* Find the previous chat in the linked list. */
                for( l = ic->groupchats; l && l->next != c; l = l->next );
                
                if( l )
                        l->next = c->next;
                else
                        ic->groupchats = c->next;
                
                for( ir = c->in_room; ir; ir = ir->next )
                        g_free( ir->data );
                g_list_free( c->in_room );
                g_free( c->channel );
                g_free( c->title );
                g_free( c->topic );
                g_free( c );
        }
}

void imcb_chat_msg( struct groupchat *c, const char *who, char *msg, uint32_t flags, time_t sent_at )
{
        struct im_connection *ic = c->ic;
        char *wrapped;
        user_t *u;
        
        /* Gaim sends own messages through this too. IRC doesn't want this, so kill them */
        if( g_strcasecmp( who, ic->acc->user ) == 0 )
                return;
        
        u = user_findhandle( ic, who );
        
        if( ( g_strcasecmp( set_getstr( &ic->irc->set, "strip_html" ), "always" ) == 0 ) ||
            ( ( ic->flags & OPT_DOES_HTML ) && set_getbool( &ic->irc->set, "strip_html" ) ) )
                strip_html( msg );
        
        wrapped = word_wrap( msg, 425 );
        if( c && u )
        {
                char *ts = NULL;
                if( set_getbool( &ic->irc->set, "display_timestamps" ) )
                        ts = format_timestamp( ic->irc, sent_at );
                irc_privmsg( ic->irc, u, "PRIVMSG", c->channel, ts ? : "", wrapped );
                g_free( ts );
        }
        else
        {
                imcb_log( ic, "Message from/to conversation %s@%p (unknown conv/user): %s", who, c, wrapped );
        }
        g_free( wrapped );
}

void imcb_chat_log( struct groupchat *c, char *format, ... )
{
        irc_t *irc = c->ic->irc;
        va_list params;
        char *text;
        user_t *u;
        
        va_start( params, format );
        text = g_strdup_vprintf( format, params );
        va_end( params );
        
        u = user_find( irc, irc->mynick );
        
        irc_privmsg( irc, u, "PRIVMSG", c->channel, "System message: ", text );
        
        g_free( text );
}

void imcb_chat_topic( struct groupchat *c, char *who, char *topic, time_t set_at )
{
        struct im_connection *ic = c->ic;
        user_t *u = NULL;
        
        if( who == NULL)
                u = user_find( ic->irc, ic->irc->mynick );
        else if( g_strcasecmp( who, ic->acc->user ) == 0 )
                u = user_find( ic->irc, ic->irc->nick );
        else
                u = user_findhandle( ic, who );
        
        if( ( g_strcasecmp( set_getstr( &ic->irc->set, "strip_html" ), "always" ) == 0 ) ||
            ( ( ic->flags & OPT_DOES_HTML ) && set_getbool( &ic->irc->set, "strip_html" ) ) )
                strip_html( topic );
        
        g_free( c->topic );
        c->topic = g_strdup( topic );
        
        if( c->joined && u )
                irc_write( ic->irc, ":%s!%s@%s TOPIC %s :%s", u->nick, u->user, u->host, c->channel, topic );
}


/* buddy_chat.c */

void imcb_chat_add_buddy( struct groupchat *b, const char *handle )
{
        user_t *u = user_findhandle( b->ic, handle );
        int me = 0;
        
        if( set_getbool( &b->ic->irc->set, "debug" ) )
                imcb_log( b->ic, "User %s added to conversation %p", handle, b );
        
        /* It might be yourself! */
        if( b->ic->acc->prpl->handle_cmp( handle, b->ic->acc->user ) == 0 )
        {
                u = user_find( b->ic->irc, b->ic->irc->nick );
                if( !b->joined )
                        irc_join( b->ic->irc, u, b->channel );
                b->joined = me = 1;
        }
        
        /* Most protocols allow people to join, even when they're not in
           your contact list. Try to handle that here */
        if( !u )
        {
                imcb_add_buddy( b->ic, handle, NULL );
                u = user_findhandle( b->ic, handle );
        }
        
        /* Add the handle to the room userlist, if it's not 'me' */
        if( !me )
        {
                if( b->joined )
                        irc_join( b->ic->irc, u, b->channel );
                b->in_room = g_list_append( b->in_room, g_strdup( handle ) );
        }
}

/* This function is one BIG hack... :-( EREWRITE */
void imcb_chat_remove_buddy( struct groupchat *b, const char *handle, const char *reason )
{
        user_t *u;
        int me = 0;
        
        if( set_getbool( &b->ic->irc->set, "debug" ) )
                imcb_log( b->ic, "User %s removed from conversation %p (%s)", handle, b, reason ? reason : "" );
        
        /* It might be yourself! */
        if( g_strcasecmp( handle, b->ic->acc->user ) == 0 )
        {
                if( b->joined == 0 )
                        return;
                
                u = user_find( b->ic->irc, b->ic->irc->nick );
                b->joined = 0;
                me = 1;
        }
        else
        {
                u = user_findhandle( b->ic, handle );
        }
        
        if( me || ( remove_chat_buddy_silent( b, handle ) && b->joined && u ) )
                irc_part( b->ic->irc, u, b->channel );
}

static int remove_chat_buddy_silent( struct groupchat *b, const char *handle )
{
        GList *i;
        
        /* Find the handle in the room userlist and shoot it */
        i = b->in_room;
        while( i )
        {
                if( g_strcasecmp( handle, i->data ) == 0 )
                {
                        g_free( i->data );
                        b->in_room = g_list_remove( b->in_room, i->data );
                        return( 1 );
                }
                
                i = i->next;
        }
        
        return( 0 );
}


/* Misc. BitlBee stuff which shouldn't really be here */

char *set_eval_away_devoice( set_t *set, char *value )
{
        irc_t *irc = set->data;
        int st;
        
        if( !is_bool( value ) )
                return SET_INVALID;
        
        st = bool2int( value );
        
        /* Horror.... */
        
        if( st != set_getbool( &irc->set, "away_devoice" ) )
        {
                char list[80] = "";
                user_t *u = irc->users;
                int i = 0, count = 0;
                char pm;
                char v[80];
                
                if( st )
                        pm = '+';
                else
                        pm = '-';
                
                while( u )
                {
                        if( u->ic && u->online && !u->away )
                        {
                                if( ( strlen( list ) + strlen( u->nick ) ) >= 79 )
                                {
                                        for( i = 0; i < count; v[i++] = 'v' ); v[i] = 0;
                                        irc_write( irc, ":%s MODE %s %c%s%s",
                                                   irc->myhost,
                                                   irc->channel, pm, v, list );
                                        
                                        *list = 0;
                                        count = 0;
                                }
                                
                                sprintf( list + strlen( list ), " %s", u->nick );
                                count ++;
                        }
                        u = u->next;
                }
                
                /* $v = 'v' x $i */
                for( i = 0; i < count; v[i++] = 'v' ); v[i] = 0;
                irc_write( irc, ":%s MODE %s %c%s%s", irc->myhost,
                                                            irc->channel, pm, v, list );
        }
        
        return value;
}

char *set_eval_timezone( set_t *set, char *value )
{
        char *s;
        
        if( strcmp( value, "local" ) == 0 ||
            strcmp( value, "gmt" ) == 0 || strcmp( value, "utc" ) == 0 )
                return value;
        
        /* Otherwise: +/- at the beginning optional, then one or more numbers,
           possibly followed by a colon and more numbers. Don't bother bound-
           checking them since users are free to shoot themselves in the foot. */
        s = value;
        if( *s == '+' || *s == '-' )
                s ++;
        
        /* \d+ */
        if( !isdigit( *s ) )
                return SET_INVALID;
        while( *s && isdigit( *s ) ) s ++;
        
        /* EOS? */
        if( *s == '\0' )
                return value;
        
        /* Otherwise, colon */
        if( *s != ':' )
                return SET_INVALID;
        s ++;
        
        /* \d+ */
        if( !isdigit( *s ) )
                return SET_INVALID;
        while( *s && isdigit( *s ) ) s ++;
        
        /* EOS */
        return *s == '\0' ? value : SET_INVALID;
}

static char *format_timestamp( irc_t *irc, time_t msg_ts )
{
        time_t now_ts = time( NULL );
        struct tm now, msg;
        char *set;
        
        /* If the timestamp is <= 0 or less than a minute ago, discard it as
           it doesn't seem to add to much useful info and/or might be noise. */
        if( msg_ts <= 0 || msg_ts > now_ts - 60 )
                return NULL;
        
        set = set_getstr( &irc->set, "timezone" );
        if( strcmp( set, "local" ) == 0 )
        {
                localtime_r( &now_ts, &now );
                localtime_r( &msg_ts, &msg );
        }
        else
        {
                int hr, min = 0, sign = 60;
                
                if( set[0] == '-' )
                {
                        sign *= -1;
                        set ++;
                }
                else if( set[0] == '+' )
                {
                        set ++;
                }
                
                if( sscanf( set, "%d:%d", &hr, &min ) >= 1 )
                {
                        msg_ts += sign * ( hr * 60 + min );
                        now_ts += sign * ( hr * 60 + min );
                }
                
                gmtime_r( &now_ts, &now );
                gmtime_r( &msg_ts, &msg );
        }
        
        if( msg.tm_year == now.tm_year && msg.tm_yday == now.tm_yday )
                return g_strdup_printf( "\x02[\x02\x02\x02%02d:%02d:%02d\x02]\x02 ",
                                        msg.tm_hour, msg.tm_min, msg.tm_sec );
        else
                return g_strdup_printf( "\x02[\x02\x02\x02%04d-%02d-%02d "
                                        "%02d:%02d:%02d\x02]\x02 ",
                                        msg.tm_year + 1900, msg.tm_mon + 1, msg.tm_mday,
                                        msg.tm_hour, msg.tm_min, msg.tm_sec );
}

/* The plan is to not allow straight calls to prpl functions anymore, but do
   them all from some wrappers. We'll start to define some down here: */

int imc_buddy_msg( struct im_connection *ic, char *handle, char *msg, int flags )
{
        char *buf = NULL;
        int st;
        
        if( ( ic->flags & OPT_DOES_HTML ) && ( g_strncasecmp( msg, "<html>", 6 ) != 0 ) )
        {
                buf = escape_html( msg );
                msg = buf;
        }
        
        st = ic->acc->prpl->buddy_msg( ic, handle, msg, flags );
        g_free( buf );
        
        return st;
}

int imc_chat_msg( struct groupchat *c, char *msg, int flags )
{
        char *buf = NULL;
        
        if( ( c->ic->flags & OPT_DOES_HTML ) && ( g_strncasecmp( msg, "<html>", 6 ) != 0 ) )
        {
                buf = escape_html( msg );
                msg = buf;
        }
        
        c->ic->acc->prpl->chat_msg( c, msg, flags );
        g_free( buf );
        
        return 1;
}

static char *imc_away_state_find( GList *gcm, char *away, char **message );

int imc_away_send_update( struct im_connection *ic )
{
        char *away, *msg = NULL;
        
        if( ic->acc->prpl->away_states == NULL ||
            ic->acc->prpl->set_away == NULL )
                return 0;
        
        away = set_getstr( &ic->acc->set, "away" ) ?
             : set_getstr( &ic->irc->set, "away" );
        if( away && *away )
        {
                GList *m = ic->acc->prpl->away_states( ic );
                msg = ic->acc->flags & ACC_FLAG_AWAY_MESSAGE ? away : NULL;
                away = imc_away_state_find( m, away, &msg ) ? : m->data;
        }
        else if( ic->acc->flags & ACC_FLAG_STATUS_MESSAGE )
        {
                away = NULL;
                msg = set_getstr( &ic->acc->set, "status" ) ?
                    : set_getstr( &ic->irc->set, "status" );
        }
        
        ic->acc->prpl->set_away( ic, away, msg );
        
        return 1;
}

static char *imc_away_alias_list[8][5] =
{
        { "Away from computer", "Away", "Extended away", NULL },
        { "NA", "N/A", "Not available", NULL },
        { "Busy", "Do not disturb", "DND", "Occupied", NULL },
        { "Be right back", "BRB", NULL },
        { "On the phone", "Phone", "On phone", NULL },
        { "Out to lunch", "Lunch", "Food", NULL },
        { "Invisible", "Hidden" },
        { NULL }
};

static char *imc_away_state_find( GList *gcm, char *away, char **message )
{
        GList *m;
        int i, j;
        
        for( m = gcm; m; m = m->next )
                if( g_strncasecmp( m->data, away, strlen( m->data ) ) == 0 )
                {
                        /* At least the Yahoo! module works better if message
                           contains no data unless it adds something to what
                           we have in state already. */
                        if( strlen( m->data ) == strlen( away ) )
                                *message = NULL;
                        
                        return m->data;
                }
        
        for( i = 0; *imc_away_alias_list[i]; i ++ )
        {
                int keep_message;
                
                for( j = 0; imc_away_alias_list[i][j]; j ++ )
                        if( g_strncasecmp( away, imc_away_alias_list[i][j], strlen( imc_away_alias_list[i][j] ) ) == 0 )
                        {
                                keep_message = strlen( away ) != strlen( imc_away_alias_list[i][j] );
                                break;
                        }
                
                if( !imc_away_alias_list[i][j] )        /* If we reach the end, this row */
                        continue;                       /* is not what we want. Next!    */
                
                /* Now find an entry in this row which exists in gcm */
                for( j = 0; imc_away_alias_list[i][j]; j ++ )
                {
                        for( m = gcm; m; m = m->next )
                                if( g_strcasecmp( imc_away_alias_list[i][j], m->data ) == 0 )
                                {
                                        if( !keep_message )
                                                *message = NULL;
                                        
                                        return imc_away_alias_list[i][j];
                                }
                }
                
                /* No need to look further, apparently this state doesn't
                   have any good alias for this protocol. */
                break;
        }
        
        return NULL;
}

void imc_add_allow( struct im_connection *ic, char *handle )
{
        if( g_slist_find_custom( ic->permit, handle, (GCompareFunc) ic->acc->prpl->handle_cmp ) == NULL )
        {
                ic->permit = g_slist_prepend( ic->permit, g_strdup( handle ) );
        }
        
        ic->acc->prpl->add_permit( ic, handle );
}

void imc_rem_allow( struct im_connection *ic, char *handle )
{
        GSList *l;
        
        if( ( l = g_slist_find_custom( ic->permit, handle, (GCompareFunc) ic->acc->prpl->handle_cmp ) ) )
        {
                g_free( l->data );
                ic->permit = g_slist_delete_link( ic->permit, l );
        }
        
        ic->acc->prpl->rem_permit( ic, handle );
}

void imc_add_block( struct im_connection *ic, char *handle )
{
        if( g_slist_find_custom( ic->deny, handle, (GCompareFunc) ic->acc->prpl->handle_cmp ) == NULL )
        {
                ic->deny = g_slist_prepend( ic->deny, g_strdup( handle ) );
        }
        
        ic->acc->prpl->add_deny( ic, handle );
}

void imc_rem_block( struct im_connection *ic, char *handle )
{
        GSList *l;
        
        if( ( l = g_slist_find_custom( ic->deny, handle, (GCompareFunc) ic->acc->prpl->handle_cmp ) ) )
        {
                g_free( l->data );
                ic->deny = g_slist_delete_link( ic->deny, l );
        }
        
        ic->acc->prpl->rem_deny( ic, handle );
}

void imcb_clean_handle( struct im_connection *ic, char *handle )
{
        /* Accepts a handle and does whatever is necessary to make it
           BitlBee-friendly. Currently this means removing everything
           outside 33-127 (ASCII printable excl spaces), @ (only one
           is allowed) and ! and : */
        char out[strlen(handle)+1];
        int s, d;
        
        s = d = 0;
        while( handle[s] )
        {
                if( handle[s] > ' ' && handle[s] != '!' && handle[s] != ':' &&
                    ( handle[s] & 0x80 ) == 0 )
                {
                        if( handle[s] == '@' )
                        {
                                /* See if we got an @ already? */
                                out[d] = 0;
                                if( strchr( out, '@' ) )
                                        continue;
                        }
                        
                        out[d++] = handle[s];
                }
                s ++;
        }
        out[d] = handle[s];
        
        strcpy( handle, out );
}