uk.org.retep.xmpp.muc.logic.DiscoveryLogic Maven / Gradle / Ivy

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package uk.org.retep.xmpp.muc.logic;

import java.util.Collection;
import java.util.List;
import uk.org.retep.util.messaging.MessageException;
import uk.org.retep.xmpp.JID;
import uk.org.retep.xmpp.XMPPServer;
import uk.org.retep.xmpp.builder.IqBuilder;
import uk.org.retep.xmpp.logic.UnexpectedMessageLogic;
import uk.org.retep.xmpp.logic.XMPPLogic;
import uk.org.retep.xmpp.logic.XMPPProtocolLogic;
import uk.org.retep.xmpp.message.Iq;
import uk.org.retep.xmpp.message.Message;
import uk.org.retep.xmpp.util.MessageFactory;
import uk.org.retep.xmpp.message.Presence;
import uk.org.retep.xmpp.message.Stanza;
import uk.org.retep.xmpp.muc.MucRoom;
import uk.org.retep.xmpp.muc.MucRoomSet;
import uk.org.retep.xmpp.muc.MucService;

/**
 * XEP-0045 Discovery
 * 
 * @author peter
 */
public enum DiscoveryLogic
        implements XMPPProtocolLogic
{

    /**
     * XEP-0045 6.1 Discovering Component Support for MUC
     */
    MUC_SUPPORT
    {

        @Override
        public Class getProtocol()
        {
            return org.jabber.protocol.disco_info.Query.class;
        }

        @Override
        public  XMPPLogic process( final XMPPServer server,
                                      final MucService service,
                                      final MucRoomSet roomSet,
                                      final Iq iq )
                throws MessageException
        {

            final org.jabber.protocol.disco_info.QueryBuilder queryBuilder = new org.jabber.protocol.disco_info.QueryBuilder();

            queryBuilder.addIdentity( "Chat Service", "conference", "text", null );

            queryBuilder.addFeature( null, "http://jabber.org/protocol/muc" );

            server.send( iq.getResponseBuilder().addContent( queryBuilder ) );

            return null;
        }
    },
    /**
     * XEP-0045 6.2 Discovering Rooms
     */
    ROOMS
    {

        @Override
        public Class getProtocol()
        {
            return org.jabber.protocol.disco_items.Query.class;
        }

        @Override
        public  XMPPLogic process( final XMPPServer server,
                                      final MucService service,
                                      final MucRoomSet ignore,
                                      final Iq iq )
                throws MessageException
        {
            final MucRoomSet roomSet = service.getRoomSet();

            final JID baseJid = roomSet.getJid().copyWithoutNodeOrResource();

            final org.jabber.protocol.disco_items.QueryBuilder queryBuilder = new org.jabber.protocol.disco_items.QueryBuilder();

            // See commented out section below of a bug in XEP-0045 RETEPXMPP-1
            //String firstName = null;
            //String lastName = null;
            final Collection names = roomSet.getRoomNames();
            for( String name : names )
            {
                // This is ok as if the room is deleted between the get and
                // sending the response, they would get an error - which is a normal
                // usecase anyhow - this is a snapshot not definitive list
                final MucRoom room = roomSet.get( name );
                if( room != null )
                {
                    // See commented out section below of a bug in XEP-0045
                    //if( firstName == null )
                    //{
                    //    firstName = name;
                    //}
                    //lastName = name;

                    queryBuilder.addItem(
                            null,
                            // TODO confusingly name in Item is actually the subject? needs confirming
                            room.getSubject(),
                            baseJid.copyWithoutNodeOrResource().setNode( name ),
                            null );
                }
            }

            /*
             * FIXME RETEPXMPP-1 According to XEP-0045 6.3 this should happen.
             * However the XML Schema only permits Items inside Query so we need
             * to check with xmpp.org and get the schema fixed
             * if( names.size() < roomSet.getSize() )
             * {
             *     final Set set = new Set();
             *
             *     final First first = new First();
             *     first.setIndex( 0 );
             *     first.setValue( firstName );

             *     set.setFirst( first );
             *     set.setLast( lastName );
             *     set.setCount( roomSet.getSize() );
             *     col.add( set );
             * }
             */

            server.send( iq.getResponseBuilder().addContent( queryBuilder ) );

            return null;
        }
    };

    @Override
    public  XMPPLogic process( final XMPPServer server,
                                  final MucService service,
                                  final MucRoomSet set,
                                  final Message message )
            throws MessageException
    {
        return UnexpectedMessageLogic.INSTANCE;
    }

    @Override
    public  XMPPLogic process( final XMPPServer server,
                                  final MucService service,
                                  final MucRoomSet set,
                                  final Presence presence )
            throws MessageException
    {
        return UnexpectedMessageLogic.INSTANCE;
    }

    @Override
    public  XMPPLogic process( final XMPPServer server,
                                  final MucService service,
                                  final MucRoomSet room,
                                  final Stanza stanza )
            throws MessageException
    {
        return UnexpectedMessageLogic.INSTANCE;
    }
}