source: protocols/nogaim.c @ 664bac3

  /********************************************************************\
  * BitlBee -- An IRC to other IM-networks gateway                     *
  *                                                                    *
  * Copyright 2002-2012 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., 51 Franklin St.,
  Fifth Floor, Boston, MA  02110-1301  USA
*/

#define BITLBEE_CORE
#include <ctype.h>

#include "nogaim.h"

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

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 ) == 0 )
                        return proto;
        }
        
        return NULL;
}

void nogaim_init()
{
        extern void msn_initmodule();
        extern void oscar_initmodule();
        extern void byahoo_initmodule();
        extern void jabber_initmodule();
        extern void twitter_initmodule();
        extern void purple_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_PURPLE
        purple_initmodule();
#endif

#ifdef WITH_PLUGINS
        load_plugins();
#endif
}

GSList *get_connections() { return connections; }

struct im_connection *imcb_new( account_t *acc )
{
        struct im_connection *ic;
        
        ic = g_new0( struct im_connection, 1 );
        
        ic->bee = acc->bee;
        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->bee->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->bee->set, "strip_html" ), "always" ) == 0 ) ||
            ( ( ic->flags & OPT_DOES_HTML ) && set_getbool( &ic->bee->set, "strip_html" ) ) )
                strip_html( text );
        
        /* Try to find a different connection on the same protocol. */
        for( a = ic->bee->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 )
                /* FIXME(wilmer): ui_log callback or so */
                irc_rootmsg( ic->bee->ui_data, "%s - %s", ic->acc->tag, text );
        else
                irc_rootmsg( ic->bee->ui_data, "%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, "Login error: %s", text );
        
        g_free( text );
}

static gboolean send_keepalive( gpointer d, gint fd, b_input_condition cond )
{
        struct im_connection *ic = d;
        
        if( ( ic->flags & OPT_PONGS ) && !( ic->flags & OPT_PONGED ) )
        {
                /* This protocol is expected to ack keepalives and hasn't
                   since the last time we were here. */
                imcb_error( ic, "Connection timeout" );
                imc_logout( ic, TRUE );
                return FALSE;
        }
        ic->flags &= ~OPT_PONGED;
        
        if( ic->acc->prpl->keepalive )
                ic->acc->prpl->keepalive( ic );
        
        return TRUE;
}

void start_keepalives( struct im_connection *ic, int interval )
{
        b_event_remove( ic->keepalive );
        ic->keepalive = b_timeout_add( interval, send_keepalive, ic );
        
        /* Connecting successfully counts as a first successful pong. */
        if( ic->flags & OPT_PONGS )
                ic->flags |= OPT_PONGED;
}

void imcb_connected( struct im_connection *ic )
{
        /* 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;
        
        imcb_log( ic, "Logged in" );
        
        ic->flags |= OPT_LOGGED_IN;
        start_keepalives( ic, 60000 );
        
        /* 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;
        
        if( ic->bee->ui->imc_connected )
                ic->bee->ui->imc_connected( ic );
}

gboolean auto_reconnect( gpointer data, gint fd, b_input_condition cond )
{
        account_t *a = data;
        
        a->reconnect = 0;
        account_on( a->bee, 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 )
{
        bee_t *bee = ic->bee;
        account_t *a;
        GSList *l;
        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;
        
        if( ic->bee->ui->imc_disconnected )
                ic->bee->ui->imc_disconnected( ic );
        
        imcb_log( ic, "Signing off.." );
        
        /* TBH I don't remember anymore why I didn't just use ic->acc... */
        for( a = bee->accounts; a; a = a->next )
                if( a->ic == ic )
                        break;
        
        if( a && !allow_reconnect && !( ic->flags & OPT_LOGGED_IN ) &&
            set_getbool( &a->set, "oauth" ) )
        {
                /* If this account supports OAuth, we're not logged in yet and
                   not allowed to retry, assume there were auth issues. Give a
                   helpful message on what might be necessary to fix this. */
                imcb_log( ic, "If you're having problems logging in, try re-requesting "
                          "an OAuth token: account %s set password \"\"", a->tag );
        }
        
        for( l = bee->users; l; )
        {
                bee_user_t *bu = l->data;
                GSList *next = l->next;
                
                if( bu->ic == ic )
                        bee_user_free( bee, bu );
                
                l = next;
        }
        
        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;
        
        query_del_by_conn( (irc_t*) ic->bee->ui_data, ic );
        
        if( !a )
        {
                /* Uhm... This is very sick. */
        }
        else if( allow_reconnect && set_getbool( &bee->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 );
}

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

void imcb_ask_with_free( struct im_connection *ic, char *msg, void *data,
                         query_callback doit, query_callback dont, query_callback myfree )
{
        query_add( (irc_t *) ic->bee->ui_data, ic, msg, doit, dont, myfree, data );
}

void imcb_add_buddy( struct im_connection *ic, const char *handle, const char *group )
{
        bee_user_t *bu;
        bee_t *bee = ic->bee;
        bee_group_t *oldg;
        
        if( !( bu = bee_user_by_handle( bee, ic, handle ) ) )
                bu = bee_user_new( bee, ic, handle, 0 );
        
        oldg = bu->group;
        bu->group = bee_group_by_name( bee, group, TRUE );
        
        if( bee->ui->user_group && bu->group != oldg )
                bee->ui->user_group( bee, bu );
}

void imcb_rename_buddy( struct im_connection *ic, const char *handle, const char *fullname )
{
        bee_t *bee = ic->bee;
        bee_user_t *bu = bee_user_by_handle( bee, ic, handle );
        
        if( !bu || !fullname ) return;
        
        if( !bu->fullname || strcmp( bu->fullname, fullname ) != 0 )
        {
                g_free( bu->fullname );
                bu->fullname = g_strdup( fullname );
                
                if( bee->ui->user_fullname )
                        bee->ui->user_fullname( bee, bu );
        }
}

void imcb_remove_buddy( struct im_connection *ic, const char *handle, char *group )
{
        bee_user_free( ic->bee, bee_user_by_handle( ic->bee, ic, handle ) );
}

/* 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 )
{
        bee_t *bee = ic->bee;
        bee_user_t *bu = bee_user_by_handle( bee, ic, handle );
        
        if( !bu || !nick ) return;
        
        g_free( bu->nick );
        bu->nick = g_strdup( nick );
        
        if( bee->ui->user_nick_hint )
                bee->ui->user_nick_hint( bee, bu, 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_ ? realname_ : "" );
        
        g_free( realname_ );
        
        data->ic = ic;
        data->handle = g_strdup( handle );
        query_add( (irc_t *) ic->bee->ui_data, ic, s,
                   imcb_ask_auth_cb_yes, imcb_ask_auth_cb_no, g_free, 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 );
        
        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( bee_user_by_handle( ic->bee, 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( (irc_t *) ic->bee->ui_data, ic, s,
                   imcb_ask_add_cb_yes, imcb_ask_add_cb_no, g_free, data );
}

struct bee_user *imcb_buddy_by_handle( struct im_connection *ic, const char *handle )
{
        return bee_user_by_handle( ic->bee, ic, handle );
}

/* 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_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->bee->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->bee->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 );
}