source: protocols/jabber/conference.c @ 489847f

/***************************************************************************\
*                                                                           *
*  BitlBee - An IRC to IM gateway                                           *
*  Jabber module - Conference rooms                                         *
*                                                                           *
*  Copyright 2007-2012 Wilmer van der Gaast <wilmer@gaast.net>              *
*                                                                           *
*  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 along  *
*  with this program; if not, write to the Free Software Foundation, Inc.,  *
*  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.              *
*                                                                           *
\***************************************************************************/

#include "jabber.h"
#include "sha1.h"

static xt_status jabber_chat_join_failed( struct im_connection *ic, struct xt_node *node, struct xt_node *orig );

struct groupchat *jabber_chat_join( struct im_connection *ic, const char *room, const char *nick, const char *password )
{
        struct jabber_chat *jc;
        struct xt_node *node;
        struct groupchat *c;
        char *roomjid;
        
        roomjid = g_strdup_printf( "%s/%s", room, nick );
        node = xt_new_node( "x", NULL, NULL );
        xt_add_attr( node, "xmlns", XMLNS_MUC );
        if( password )
                xt_add_child( node, xt_new_node( "password", password, NULL ) );
        node = jabber_make_packet( "presence", NULL, roomjid, node );
        jabber_cache_add( ic, node, jabber_chat_join_failed );
        
        if( !jabber_write_packet( ic, node ) )
        {
                g_free( roomjid );
                return NULL;
        }
        
        jc = g_new0( struct jabber_chat, 1 );
        jc->name = jabber_normalize( room );
        
        if( ( jc->me = jabber_buddy_add( ic, roomjid ) ) == NULL )
        {
                g_free( roomjid );
                g_free( jc->name );
                g_free( jc );
                return NULL;
        }
        
        /* roomjid isn't normalized yet, and we need an original version
           of the nick to send a proper presence update. */
        jc->my_full_jid = roomjid;
        
        c = imcb_chat_new( ic, room );
        c->data = jc;
        
        return c;
}

struct groupchat *jabber_chat_with( struct im_connection *ic, char *who )
{
        struct jabber_data *jd = ic->proto_data;
        struct jabber_chat *jc;
        struct groupchat *c;
        sha1_state_t sum;
        double now = gettime();
        char *uuid, *rjid, *cserv;
        
        sha1_init( &sum );
        sha1_append( &sum, (uint8_t*) ic->acc->user, strlen( ic->acc->user ) );
        sha1_append( &sum, (uint8_t*) &now, sizeof( now ) );
        sha1_append( &sum, (uint8_t*) who, strlen( who ) );
        uuid = sha1_random_uuid( &sum );
        
        if( jd->flags & JFLAG_GTALK )
                cserv = g_strdup( "groupchat.google.com" );
        else
                /* Guess... */
                cserv = g_strdup_printf( "conference.%s", jd->server );
        
        rjid = g_strdup_printf( "private-chat-%s@%s", uuid, cserv );
        g_free( uuid );
        g_free( cserv );
        
        c = jabber_chat_join( ic, rjid, jd->username, NULL );
        g_free( rjid );
        if( c == NULL )
                return NULL;
        
        jc = c->data;
        jc->invite = g_strdup( who );
        
        return c;
}

static xt_status jabber_chat_join_failed( struct im_connection *ic, struct xt_node *node, struct xt_node *orig )
{
        struct jabber_error *err;
        struct jabber_buddy *bud;
        char *room;
        
        room = xt_find_attr( orig, "to" );
        bud = jabber_buddy_by_jid( ic, room, 0 );
        err = jabber_error_parse( xt_find_node( node->children, "error" ), XMLNS_STANZA_ERROR );
        if( err )
        {
                imcb_error( ic, "Error joining groupchat %s: %s%s%s", room, err->code,
                            err->text ? ": " : "", err->text ? err->text : "" );
                jabber_error_free( err );
        }
        if( bud )
                jabber_chat_free( jabber_chat_by_jid( ic, bud->bare_jid ) );
        
        return XT_HANDLED;
}

struct groupchat *jabber_chat_by_jid( struct im_connection *ic, const char *name )
{
        char *normalized = jabber_normalize( name );
        GSList *l;
        struct groupchat *ret;
        struct jabber_chat *jc;
        
        for( l = ic->groupchats; l; l = l->next )
        {
                ret = l->data;
                jc = ret->data;
                if( strcmp( normalized, jc->name ) == 0 )
                        break;
        }
        g_free( normalized );
        
        return l ? ret : NULL;
}

void jabber_chat_free( struct groupchat *c )
{
        struct jabber_chat *jc = c->data;
        
        jabber_buddy_remove_bare( c->ic, jc->name );
        
        g_free( jc->my_full_jid );
        g_free( jc->name );
        g_free( jc->invite );
        g_free( jc );
        
        imcb_chat_free( c );
}

int jabber_chat_msg( struct groupchat *c, char *message, int flags )
{
        struct im_connection *ic = c->ic;
        struct jabber_chat *jc = c->data;
        struct xt_node *node;
        
        jc->flags |= JCFLAG_MESSAGE_SENT;
        
        node = xt_new_node( "body", message, NULL );
        node = jabber_make_packet( "message", "groupchat", jc->name, node );
        
        if( !jabber_write_packet( ic, node ) )
        {
                xt_free_node( node );
                return 0;
        }
        xt_free_node( node );
        
        return 1;
}

int jabber_chat_topic( struct groupchat *c, char *topic )
{
        struct im_connection *ic = c->ic;
        struct jabber_chat *jc = c->data;
        struct xt_node *node;
        
        node = xt_new_node( "subject", topic, NULL );
        node = jabber_make_packet( "message", "groupchat", jc->name, node );
        
        if( !jabber_write_packet( ic, node ) )
        {
                xt_free_node( node );
                return 0;
        }
        xt_free_node( node );
        
        return 1;
}

int jabber_chat_leave( struct groupchat *c, const char *reason )
{
        struct im_connection *ic = c->ic;
        struct jabber_chat *jc = c->data;
        struct xt_node *node;
        
        node = xt_new_node( "x", NULL, NULL );
        xt_add_attr( node, "xmlns", XMLNS_MUC );
        node = jabber_make_packet( "presence", "unavailable", jc->my_full_jid, node );
        
        if( !jabber_write_packet( ic, node ) )
        {
                xt_free_node( node );
                return 0;
        }
        xt_free_node( node );
        
        return 1;
}

void jabber_chat_invite( struct groupchat *c, char *who, char *message )
{
        struct xt_node *node;
        struct im_connection *ic = c->ic;
        struct jabber_chat *jc = c->data;

        node = xt_new_node( "reason", message, NULL ); 

        node = xt_new_node( "invite", NULL, node );
        xt_add_attr( node, "to", who ); 

        node = xt_new_node( "x", NULL, node ); 
        xt_add_attr( node, "xmlns", XMLNS_MUC_USER ); 
        
        node = jabber_make_packet( "message", NULL, jc->name, node ); 

        jabber_write_packet( ic, node ); 

        xt_free_node( node );
}

/* Not really the same syntax as the normal pkt_ functions, but this isn't
   called by the xmltree parser directly and this way I can add some extra
   parameters so we won't have to repeat too many things done by the caller
   already. */
void jabber_chat_pkt_presence( struct im_connection *ic, struct jabber_buddy *bud, struct xt_node *node )
{
        struct groupchat *chat;
        struct xt_node *c;
        char *type = xt_find_attr( node, "type" );
        struct jabber_data *jd = ic->proto_data;
        struct jabber_chat *jc;
        char *s;
        
        if( ( chat = jabber_chat_by_jid( ic, bud->bare_jid ) ) == NULL )
        {
                /* How could this happen?? We could do kill( self, 11 )
                   now or just wait for the OS to do it. :-) */
                return;
        }
        
        jc = chat->data;
        
        if( type == NULL && !( bud->flags & JBFLAG_IS_CHATROOM ) )
        {
                bud->flags |= JBFLAG_IS_CHATROOM;
                /* If this one wasn't set yet, this buddy just joined the chat.
                   Slightly hackish way of finding out eh? ;-) */
                
                /* This is pretty messy... Here it sets ext_jid to the real
                   JID of the participant. Works for non-anonymized channels.
                   Might break if someone joins a chat twice, though. */
                for( c = node->children; ( c = xt_find_node( c, "x" ) ); c = c->next )
                        if( ( s = xt_find_attr( c, "xmlns" ) ) &&
                            ( strcmp( s, XMLNS_MUC_USER ) == 0 ) )
                        {
                                struct xt_node *item;
                                
                                item = xt_find_node( c->children, "item" );
                                if( ( s = xt_find_attr( item, "jid" ) ) )
                                {
                                        /* Yay, found what we need. :-) */
                                        bud->ext_jid = jabber_normalize( s );
                                        break;
                                }
                        }
                
                /* Make up some other handle, if necessary. */
                if( bud->ext_jid == NULL )
                {
                        if( bud == jc->me )
                        {
                                bud->ext_jid = g_strdup( jd->me );
                        }
                        else
                        {
                                int i;
                                
                                /* Don't want the nick to be at the end, so let's
                                   think of some slightly different notation to use
                                   for anonymous groupchat participants in BitlBee. */
                                bud->ext_jid = g_strdup_printf( "%s=%s", bud->resource, bud->bare_jid );
                                
                                /* And strip any unwanted characters. */
                                for( i = 0; bud->resource[i]; i ++ )
                                        if( bud->ext_jid[i] == '=' || bud->ext_jid[i] == '@' )
                                                bud->ext_jid[i] = '_';
                                
                                /* Some program-specific restrictions. */
                                imcb_clean_handle( ic, bud->ext_jid );
                        }
                        bud->flags |= JBFLAG_IS_ANONYMOUS;
                }
                
                if( bud != jc->me && bud->flags & JBFLAG_IS_ANONYMOUS )
                {
                        /* If JIDs are anonymized, add them to the local
                           list for the duration of this chat. */
                        imcb_add_buddy( ic, bud->ext_jid, NULL );
                        imcb_buddy_nick_hint( ic, bud->ext_jid, bud->resource );
                }
                
                if( bud == jc->me && jc->invite != NULL )
                {
                        char *msg = g_strdup_printf( "Please join me in room %s", jc->name );
                        jabber_chat_invite( chat, jc->invite, msg );
                        g_free( jc->invite );
                        g_free( msg );
                        jc->invite = NULL;
                }
                
                s = strchr( bud->ext_jid, '/' );
                if( s ) *s = 0; /* Should NEVER be NULL, but who knows... */
                imcb_chat_add_buddy( chat, bud->ext_jid );
                if( s ) *s = '/';
        }
        else if( type ) /* type can only be NULL or "unavailable" in this function */
        {
                if( ( bud->flags & JBFLAG_IS_CHATROOM ) && bud->ext_jid )
                {
                        s = strchr( bud->ext_jid, '/' );
                        if( s ) *s = 0;
                        imcb_chat_remove_buddy( chat, bud->ext_jid, NULL );
                        if( bud != jc->me && bud->flags & JBFLAG_IS_ANONYMOUS )
                                imcb_remove_buddy( ic, bud->ext_jid, NULL );
                        if( s ) *s = '/';
                }
                
                if( bud == jc->me )
                        jabber_chat_free( chat );
        }
}

void jabber_chat_pkt_message( struct im_connection *ic, struct jabber_buddy *bud, struct xt_node *node )
{
        struct xt_node *subject = xt_find_node( node->children, "subject" );
        struct xt_node *body = xt_find_node( node->children, "body" );
        struct groupchat *chat = bud ? jabber_chat_by_jid( ic, bud->bare_jid ) : NULL;
        struct jabber_chat *jc = chat ? chat->data : NULL;
        char *s;
        
        if( subject && chat )
        {
                s = bud ? strchr( bud->ext_jid, '/' ) : NULL;
                if( s ) *s = 0;
                imcb_chat_topic( chat, bud ? bud->ext_jid : NULL, subject->text_len > 0 ?
                                 subject->text : NULL, jabber_get_timestamp( node ) );
                if( s ) *s = '/';
        }
        
        if( bud == NULL || ( jc && ~jc->flags & JCFLAG_MESSAGE_SENT && bud == jc->me ) )
        {
                char *nick;
                
                if( body == NULL || body->text_len == 0 )
                        /* Meh. Empty messages aren't very interesting, no matter
                           how much some servers love to send them. */
                        return;
                
                s = xt_find_attr( node, "from" ); /* pkt_message() already NULL-checked this one. */
                nick = strchr( s, '/' );
                if( nick )
                {
                        /* If this message included a resource/nick we don't know,
                           we might still know the groupchat itself. */
                        *nick = 0;
                        chat = jabber_chat_by_jid( ic, s );
                        *nick = '/';
                        
                        nick ++;
                }
                else
                {
                        /* message.c uses the EXACT_JID option, so bud should
                           always be NULL here for bare JIDs. */
                        chat = jabber_chat_by_jid( ic, s );
                }
                
                if( nick == NULL )
                {
                        /* This is fine, the groupchat itself isn't in jd->buddies. */
                        if( chat )
                                imcb_chat_log( chat, "From conference server: %s", body->text );
                        else
                                imcb_log( ic, "System message from unknown groupchat %s: %s", s, body->text );
                }
                else
                {
                        /* This can happen too, at least when receiving a backlog when
                           just joining a channel. */
                        if( chat )
                                imcb_chat_log( chat, "Message from unknown participant %s: %s", nick, body->text );
                        else
                                imcb_log( ic, "Groupchat message from unknown JID %s: %s", s, body->text );
                }
                
                return;
        }
        else if( chat == NULL )
        {
                /* How could this happen?? We could do kill( self, 11 )
                   now or just wait for the OS to do it. :-) */
                return;
        }
        if( body && body->text_len > 0 )
        {
                s = strchr( bud->ext_jid, '/' );
                if( s ) *s = 0;
                imcb_chat_msg( chat, bud->ext_jid, body->text, 0, jabber_get_timestamp( node ) );
                if( s ) *s = '/';
        }
}