com.kixeye.kixmpp.server.module.bind.BindKixmppServerModule.java Source code

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Here is the source code for com.kixeye.kixmpp.server.module.bind.BindKixmppServerModule.java

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package com.kixeye.kixmpp.server.module.bind;

/*
 * #%L
 * KIXMPP
 * %%
 * Copyright (C) 2014 KIXEYE, Inc
 * %%
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * #L%
 */

import io.netty.channel.Channel;
import io.netty.util.AttributeKey;

import java.util.LinkedList;
import java.util.List;
import java.util.UUID;

import org.jdom2.Element;
import org.jdom2.Namespace;

import com.kixeye.kixmpp.KixmppJid;
import com.kixeye.kixmpp.handler.KixmppStanzaHandler;
import com.kixeye.kixmpp.server.KixmppServer;
import com.kixeye.kixmpp.server.module.KixmppServerModule;

/**
 * Handles binds.
 * 
 * @author ebahtijaragic
 */
public class BindKixmppServerModule implements KixmppServerModule {
    public static AttributeKey<Boolean> IS_BOUND = AttributeKey.valueOf("IS_BOUND");

    public static AttributeKey<KixmppJid> JID = AttributeKey.valueOf("JID");

    private KixmppServer server;

    /**
     * @see com.kixeye.kixmpp.server.module.KixmppModule#install(com.kixeye.kixmpp.server.KixmppServer)
     */
    public void install(KixmppServer server) {
        this.server = server;

        this.server.getEventEngine().registerGlobalStanzaHandler("iq", BIND_HANDLER);
    }

    /**
     * @see com.kixeye.kixmpp.server.module.KixmppModule#uninstall(com.kixeye.kixmpp.server.KixmppServer)
     */
    public void uninstall(KixmppServer server) {
        this.server.getEventEngine().unregisterGlobalStanzaHandler("iq", BIND_HANDLER);
    }

    /**
     * @see com.kixeye.kixmpp.server.module.KixmppServerModule#getFeatures(io.netty.channel.Channel)
     */
    public List<Element> getFeatures(Channel channel) {
        List<Element> features = new LinkedList<>();

        Boolean isBound = channel.attr(IS_BOUND).get();

        if (isBound == null || isBound == false) {
            Element bind = new Element("bind", null, "urn:ietf:params:xml:ns:xmpp-bind");

            features.add(bind);
        }

        return features;
    }

    private KixmppStanzaHandler BIND_HANDLER = new KixmppStanzaHandler() {
        /**
         * @see com.kixeye.kixmpp.server.KixmppStanzaHandler#handle(io.netty.channel.Channel, org.jdom2.Element)
         */
        public void handle(Channel channel, Element stanza) {
            Element bind = stanza.getChild("bind", Namespace.getNamespace("urn:ietf:params:xml:ns:xmpp-bind"));

            if (bind != null) {
                // handle the bind
                String resource = bind.getChildText("resource",
                        Namespace.getNamespace("urn:ietf:params:xml:ns:xmpp-bind"));

                if (resource == null) {
                    resource = UUID.randomUUID().toString().replace("-", "");
                }

                KixmppJid jid = channel.attr(BindKixmppServerModule.JID).get().withResource(resource);

                channel.attr(BindKixmppServerModule.IS_BOUND).set(true);

                channel.attr(BindKixmppServerModule.JID).set(jid);

                server.addChannelMapping(jid, channel);

                Element iq = new Element("iq");
                iq.setAttribute("type", "result");

                String id = stanza.getAttributeValue("id");

                if (id != null) {
                    iq.setAttribute("id", id);
                }

                bind = new Element("bind", Namespace.getNamespace("urn:ietf:params:xml:ns:xmpp-bind"));
                bind.addContent(new Element("jid", Namespace.getNamespace("urn:ietf:params:xml:ns:xmpp-bind"))
                        .setText(jid.toString()));

                iq.addContent(bind);

                channel.writeAndFlush(iq);
            }
        }
    };
}