/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*
*/
package org.apache.vysper.xmpp.modules.extension.xep0060_pubsub.handler;
import org.apache.vysper.compliance.SpecCompliance;
import org.apache.vysper.compliance.SpecCompliant;
import org.apache.vysper.xml.fragment.XMLElement;
import org.apache.vysper.xmpp.addressing.Entity;
import org.apache.vysper.xmpp.addressing.EntityFormatException;
import org.apache.vysper.xmpp.addressing.EntityImpl;
import org.apache.vysper.xmpp.modules.extension.xep0060_pubsub.PubSubServiceConfiguration;
import org.apache.vysper.xmpp.modules.extension.xep0060_pubsub.model.CollectionNode;
import org.apache.vysper.xmpp.modules.extension.xep0060_pubsub.model.LeafNode;
import org.apache.vysper.xmpp.protocol.NamespaceURIs;
import org.apache.vysper.xmpp.server.ServerRuntimeContext;
import org.apache.vysper.xmpp.server.SessionContext;
import org.apache.vysper.xmpp.stanza.IQStanza;
import org.apache.vysper.xmpp.stanza.IQStanzaType;
import org.apache.vysper.xmpp.stanza.Stanza;
import org.apache.vysper.xmpp.stanza.StanzaBuilder;
/**
* This class handles the "subscribe" use cases for the "pubsub" namespace.
*
* @author The Apache MINA Project (http://mina.apache.org)
*/
@SpecCompliant(spec = "xep-0060", section = "6.1", status = SpecCompliant.ComplianceStatus.IN_PROGRESS, coverage = SpecCompliant.ComplianceCoverage.PARTIAL)
public class PubSubSubscribeHandler extends AbstractPubSubGeneralHandler {
/**
* Creates a new subscribe handler for users.
*
* @param serviceConfiguration
*/
public PubSubSubscribeHandler(PubSubServiceConfiguration serviceConfiguration) {
super(serviceConfiguration);
}
/**
* @return "subscribe" as worker element.
*/
@Override
protected String getWorkerElement() {
return "subscribe";
}
/**
* This method takes care of handling the "subscribe" use-case including all (relevant) error conditions.
*
* @return the appropriate response stanza (either success or some error condition).
*/
@Override
@SpecCompliance(compliant = {
@SpecCompliant(spec = "xep-0060", section = "6.1.2", status = SpecCompliant.ComplianceStatus.FINISHED, coverage = SpecCompliant.ComplianceCoverage.COMPLETE),
@SpecCompliant(spec = "xep-0060", section = "6.1.3.1", status = SpecCompliant.ComplianceStatus.FINISHED, coverage = SpecCompliant.ComplianceCoverage.COMPLETE),
@SpecCompliant(spec = "xep-0060", section = "6.1.3.2", status = SpecCompliant.ComplianceStatus.NOT_STARTED, coverage = SpecCompliant.ComplianceCoverage.UNSUPPORTED),
@SpecCompliant(spec = "xep-0060", section = "6.1.3.3", status = SpecCompliant.ComplianceStatus.NOT_STARTED, coverage = SpecCompliant.ComplianceCoverage.UNSUPPORTED),
@SpecCompliant(spec = "xep-0060", section = "6.1.3.4", status = SpecCompliant.ComplianceStatus.NOT_STARTED, coverage = SpecCompliant.ComplianceCoverage.UNSUPPORTED),
@SpecCompliant(spec = "xep-0060", section = "6.1.3.5", status = SpecCompliant.ComplianceStatus.NOT_STARTED, coverage = SpecCompliant.ComplianceCoverage.UNSUPPORTED),
@SpecCompliant(spec = "xep-0060", section = "6.1.3.6", status = SpecCompliant.ComplianceStatus.NOT_STARTED, coverage = SpecCompliant.ComplianceCoverage.UNSUPPORTED),
@SpecCompliant(spec = "xep-0060", section = "6.1.3.7", status = SpecCompliant.ComplianceStatus.NOT_STARTED, coverage = SpecCompliant.ComplianceCoverage.UNSUPPORTED),
@SpecCompliant(spec = "xep-0060", section = "6.1.3.8", status = SpecCompliant.ComplianceStatus.NOT_STARTED, coverage = SpecCompliant.ComplianceCoverage.UNSUPPORTED),
@SpecCompliant(spec = "xep-0060", section = "6.1.3.9", status = SpecCompliant.ComplianceStatus.NOT_STARTED, coverage = SpecCompliant.ComplianceCoverage.UNSUPPORTED),
@SpecCompliant(spec = "xep-0060", section = "6.1.3.10", status = SpecCompliant.ComplianceStatus.NOT_STARTED, coverage = SpecCompliant.ComplianceCoverage.UNSUPPORTED),
@SpecCompliant(spec = "xep-0060", section = "6.1.3.11", status = SpecCompliant.ComplianceStatus.FINISHED, coverage = SpecCompliant.ComplianceCoverage.COMPLETE) })
protected Stanza handleSet(IQStanza stanza, ServerRuntimeContext serverRuntimeContext, SessionContext sessionContext) {
Entity serverJID = serviceConfiguration.getDomainJID();
CollectionNode root = serviceConfiguration.getRootNode();
Entity sender = extractSenderJID(stanza, sessionContext);
Entity subJID = null;
StanzaBuilder sb = StanzaBuilder.createDirectReply(stanza, false, IQStanzaType.RESULT);
sb.startInnerElement("pubsub", NamespaceURIs.XEP0060_PUBSUB);
XMLElement sub = stanza.getFirstInnerElement().getFirstInnerElement(); // pubsub/subscribe
String strSubJID = sub.getAttributeValue("jid"); // MUST
try {
subJID = EntityImpl.parse(strSubJID);
} catch (EntityFormatException e) {
return errorStanzaGenerator.generateJIDMalformedErrorStanza(sender, serverJID, stanza);
}
if (!sender.getBareJID().equals(subJID.getBareJID())) {
// error condition 1 (6.1.3)
return errorStanzaGenerator.generateJIDDontMatchErrorStanza(sender, serverJID, stanza);
}
String nodeName = extractNodeName(stanza);
LeafNode node = root.find(nodeName);
if (node == null) {
// no such node (error condition 11 (6.1.3))
return errorStanzaGenerator.generateNoNodeErrorStanza(sender, serverJID, stanza);
}
String id = idGenerator.create();
node.subscribe(id, subJID);
buildSuccessStanza(sb, nodeName, strSubJID, id);
sb.endInnerElement(); // pubsub
return new IQStanza(sb.build());
}
/**
* This method adds the default "success" elements to the given StanzaBuilder.
*
* @param sb the StanzaBuilder to add the success elements.
* @param nodeName the node the user wanted to subscribe to.
* @param jid the jid of the subscriber.
* @param subid the subscription id for the given JID.
*/
private void buildSuccessStanza(StanzaBuilder sb, String nodeName, String jid, String subid) {
sb.startInnerElement("subscription", NamespaceURIs.XEP0060_PUBSUB);
sb.addAttribute("node", nodeName);
sb.addAttribute("jid", jid);
sb.addAttribute("subid", subid);
sb.addAttribute("subscription", "subscribed");
sb.endInnerElement();
}
}