184 lines
8.1 KiB
Java
184 lines
8.1 KiB
Java
/**
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*
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* Copyright 2020 Paul Schaub
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.jivesoftware.smackx.mix.core;
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import static org.jivesoftware.smackx.mix.core.MixCoreConstants.FEATURE_CORE_1;
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import java.util.List;
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import java.util.Map;
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import java.util.WeakHashMap;
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import java.util.stream.Collectors;
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import org.jivesoftware.smack.ConnectionCreationListener;
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import org.jivesoftware.smack.Manager;
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import org.jivesoftware.smack.SmackException;
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import org.jivesoftware.smack.XMPPConnection;
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import org.jivesoftware.smack.XMPPConnectionRegistry;
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import org.jivesoftware.smack.XMPPException;
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import org.jivesoftware.smackx.disco.ServiceDiscoveryManager;
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import org.jivesoftware.smackx.disco.packet.DiscoverInfo;
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import org.jivesoftware.smackx.disco.packet.DiscoverItems;
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import org.jivesoftware.smackx.mam.element.MamElements;
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import org.jivesoftware.smackx.mix.core.element.iq.ClientJoinIQ;
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import org.jivesoftware.smackx.mix.core.element.iq.ClientJoinIQBuilder;
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import org.jivesoftware.smackx.mix.core.exception.NotAMixChannelOrNoPermissionToSubscribeException;
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import org.jivesoftware.smackx.mix.core.exception.NotAMixServiceException;
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import org.jivesoftware.smackx.pubsub.packet.PubSub;
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import org.jxmpp.jid.DomainBareJid;
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import org.jxmpp.jid.EntityBareJid;
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import org.jxmpp.jid.Jid;
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import org.jxmpp.util.cache.ExpirationCache;
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public final class MixManager extends Manager {
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private static final Map<XMPPConnection, MixManager> INSTANCES = new WeakHashMap<>();
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private static final ExpirationCache<DomainBareJid, MixService> KNOWN_MIX_SERVICES =
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new ExpirationCache<>(100, 1000 * 60 * 60 * 24);
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static {
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XMPPConnectionRegistry.addConnectionCreationListener(new ConnectionCreationListener() {
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@Override
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public void connectionCreated(XMPPConnection connection) {
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MixManager.getInstanceFor(connection);
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}
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});
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}
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private final ServiceDiscoveryManager serviceDiscoveryManager;
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public static MixManager getInstanceFor(XMPPConnection connection) {
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MixManager manager = INSTANCES.get(connection);
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if (manager == null) {
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manager = new MixManager(connection);
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INSTANCES.put(connection, manager);
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}
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return manager;
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}
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private MixManager(XMPPConnection connection) {
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super(connection);
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serviceDiscoveryManager = ServiceDiscoveryManager.getInstanceFor(connection());
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serviceDiscoveryManager.addFeature(FEATURE_CORE_1);
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}
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public List<EntityBareJid> discoverMixChannels(DomainBareJid mixServiceAddress)
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throws XMPPException.XMPPErrorException, SmackException.NotConnectedException, InterruptedException,
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SmackException.NoResponseException, NotAMixServiceException,
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SmackException.FeatureNotSupportedException {
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MixService mixService = getOrDiscoverMixService(mixServiceAddress);
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if (!mixService.isSearchable()) {
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throw new SmackException.FeatureNotSupportedException(MixCoreConstants.FEATURE_SEARCHABLE_1, mixServiceAddress);
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}
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DiscoverItems discoverItems = serviceDiscoveryManager.discoverItems(mixServiceAddress);
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List<EntityBareJid> channelJids = discoverItems.getItems().stream()
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.map(DiscoverItems.Item::getEntityID)
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.map(Jid::asEntityBareJidOrThrow)
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.collect(Collectors.toList());
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return channelJids;
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}
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private MixService getOrDiscoverMixService(DomainBareJid mixServiceAddress)
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throws SmackException.NoResponseException, XMPPException.XMPPErrorException,
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SmackException.NotConnectedException, InterruptedException, NotAMixServiceException {
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if (KNOWN_MIX_SERVICES.containsKey(mixServiceAddress)) {
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return KNOWN_MIX_SERVICES.get(mixServiceAddress);
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}
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return discoverMixService(mixServiceAddress);
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}
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private MixService discoverMixService(DomainBareJid mixServiceAddress)
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throws SmackException.NoResponseException, XMPPException.XMPPErrorException,
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SmackException.NotConnectedException, InterruptedException, NotAMixServiceException {
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DiscoverInfo mixServiceDiscoverInfo = serviceDiscoveryManager.discoverInfo(mixServiceAddress);
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if (!mixServiceDiscoverInfo.hasIdentity("conference", "mix")) {
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throw new NotAMixServiceException("Identity of the service MUST have a category 'conference' and a type of 'mix'.");
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}
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if (!mixServiceDiscoverInfo.containsFeature(FEATURE_CORE_1)) {
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throw new NotAMixServiceException("Service MUST include the '" + FEATURE_CORE_1 + "' feature.");
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}
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mixServiceStandardComplianceChecks(mixServiceDiscoverInfo);
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MixService mixService = new MixService(mixServiceAddress, mixServiceDiscoverInfo);
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KNOWN_MIX_SERVICES.put(mixServiceAddress, mixService);
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return mixService;
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}
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public MixChannel discoverMixChannelInformation(EntityBareJid mixChannelAddress)
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throws XMPPException.XMPPErrorException, SmackException.NotConnectedException, InterruptedException,
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SmackException.NoResponseException, NotAMixChannelOrNoPermissionToSubscribeException {
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DiscoverInfo channelInfo = serviceDiscoveryManager.discoverInfo(mixChannelAddress);
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if (!channelInfo.hasIdentity("conference", "mix")) {
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throw new NotAMixChannelOrNoPermissionToSubscribeException(
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"DiscoverInfo did not contain identity with category 'conference' and type 'mix'.");
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}
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mixChannelStandardComplianceChecks(channelInfo);
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//return new MixChannel(mixChannelAddress, channelInfo);
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return null;
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}
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/**
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* Perform checks for standards compliance on the service.
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* These checks are not strictly necessary, but may be used to identify faulty server implementations.
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*
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* @param info DiscoverInfo of the mix service.
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*/
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private void mixServiceStandardComplianceChecks(DiscoverInfo info) {
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if (info.containsFeature(MamElements.NAMESPACE)) {
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// XEP-0369: §6.1
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throw new AssertionError("A MIX service MUST NOT advertise support for MAM.");
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}
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if (info.containsFeature(PubSub.NAMESPACE)) {
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// XEP-0369: §6.1
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throw new AssertionError("A MIX service MUST NOT advertise support for PubSub.");
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}
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}
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private void mixChannelStandardComplianceChecks(DiscoverInfo channelInfo) throws NotAMixChannelOrNoPermissionToSubscribeException {
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if (!channelInfo.containsFeature(FEATURE_CORE_1)) {
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throw new NotAMixChannelOrNoPermissionToSubscribeException(
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"MIX channel did not advertise feature '" + FEATURE_CORE_1 + "'.");
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}
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if (!channelInfo.containsFeature(MamElements.NAMESPACE)) {
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throw new NotAMixChannelOrNoPermissionToSubscribeException(
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"MIX channel did not advertise feature '" + MamElements.NAMESPACE + "'.");
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}
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}
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public MixChannel join(EntityBareJid channelAddress, String nick)
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throws XMPPException.XMPPErrorException, NotAMixChannelOrNoPermissionToSubscribeException,
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SmackException.NotConnectedException, InterruptedException, SmackException.NoResponseException {
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MixChannel channel = discoverMixChannelInformation(channelAddress);
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ClientJoinIQ iq = new ClientJoinIQBuilder(connection())
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.setNickname(nick)
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.setChannelAddress(channelAddress)
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.addMixNodeSubscription(MixNodes.NODE_MESSAGES)
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.addMixNodeSubscription(MixNodes.NODE_PRESENCE)
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.build();
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return null;
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}
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}
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