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/**
*
* Copyright 2003-2006 Jive Software.
*
* 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.
*/
package org.jivesoftware.smackx.address;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import org.jivesoftware.smack.SmackException.FeatureNotSupportedException;
import org.jivesoftware.smack.SmackException.NoResponseException;
import org.jivesoftware.smack.SmackException.NotConnectedException;
import org.jivesoftware.smack.XMPPConnection;
import org.jivesoftware.smack.XMPPException.XMPPErrorException;
import org.jivesoftware.smack.packet.Message;
import org.jivesoftware.smack.packet.Stanza;
import org.jivesoftware.smack.util.StringUtils;
import org.jivesoftware.smackx.address.packet.MultipleAddresses;
import org.jivesoftware.smackx.disco.ServiceDiscoveryManager;
import org.jxmpp.jid.DomainBareJid;
import org.jxmpp.jid.EntityBareJid;
import org.jxmpp.jid.EntityFullJid;
import org.jxmpp.jid.Jid;
/**
* A MultipleRecipientManager allows to send packets to multiple recipients by making use of
* XEP-33: Extended Stanza Addressing.
* It also allows to send replies to packets that were sent to multiple recipients.
*
* @author Gaston Dombiak
*/
public class MultipleRecipientManager {
/**
* Sends the specified stanza to the collection of specified recipients using the
* specified connection. If the server has support for XEP-33 then only one
* stanza is going to be sent to the server with the multiple recipient instructions.
* However, if XEP-33 is not supported by the server then the client is going to send
* the stanza to each recipient.
*
* @param connection the connection to use to send the packet.
* @param packet the stanza to send to the list of recipients.
* @param to the collection of JIDs to include in the TO list or null if no TO
* list exists.
* @param cc the collection of JIDs to include in the CC list or null if no CC
* list exists.
* @param bcc the collection of JIDs to include in the BCC list or null if no BCC
* list exists.
* @throws FeatureNotSupportedException if special XEP-33 features where requested, but the
* server does not support them.
* @throws XMPPErrorException if server does not support XEP-33: Extended Stanza Addressing and
* some XEP-33 specific features were requested.
* @throws NoResponseException if there was no response from the server.
* @throws NotConnectedException
* @throws InterruptedException
*/
public static void send(XMPPConnection connection, Stanza packet, Collection to,
Collection cc, Collection bcc) throws NoResponseException, XMPPErrorException,
FeatureNotSupportedException, NotConnectedException, InterruptedException {
send(connection, packet, to, cc, bcc, null, null, false);
}
/**
* Sends the specified stanza to the collection of specified recipients using the specified
* connection. If the server has support for XEP-33 then only one stanza is going to be sent to
* the server with the multiple recipient instructions. However, if XEP-33 is not supported by
* the server then the client is going to send the stanza to each recipient.
*
* @param connection the connection to use to send the packet.
* @param packet the stanza to send to the list of recipients.
* @param to the collection of JIDs to include in the TO list or null if no TO list exists.
* @param cc the collection of JIDs to include in the CC list or null if no CC list exists.
* @param bcc the collection of JIDs to include in the BCC list or null if no BCC list
* exists.
* @param replyTo address to which all replies are requested to be sent or null
* indicating that they can reply to any address.
* @param replyRoom JID of a MUC room to which responses should be sent or null
* indicating that they can reply to any address.
* @param noReply true means that receivers should not reply to the message.
* @throws XMPPErrorException if server does not support XEP-33: Extended Stanza Addressing and
* some XEP-33 specific features were requested.
* @throws NoResponseException if there was no response from the server.
* @throws FeatureNotSupportedException if special XEP-33 features where requested, but the
* server does not support them.
* @throws NotConnectedException
* @throws InterruptedException
*/
public static void send(XMPPConnection connection, Stanza packet, Collection to, Collection cc, Collection bcc,
Jid replyTo, Jid replyRoom, boolean noReply) throws NoResponseException, XMPPErrorException, FeatureNotSupportedException, NotConnectedException, InterruptedException {
// Check if *only* 'to' is set and contains just *one* entry, in this case extended stanzas addressing is not
// required at all and we can send it just as normal stanza without needing to add the extension element
if (to != null && to.size() == 1 && (cc == null || cc.isEmpty()) && (bcc == null || bcc.isEmpty()) && !noReply
&& StringUtils.isNullOrEmpty(replyTo) && StringUtils.isNullOrEmpty(replyRoom)) {
Jid toJid = to.iterator().next();
packet.setTo(toJid);
connection.sendStanza(packet);
return;
}
DomainBareJid serviceAddress = getMultipleRecipientServiceAddress(connection);
if (serviceAddress != null) {
// Send packet to target users using multiple recipient service provided by the server
sendThroughService(connection, packet, to, cc, bcc, replyTo, replyRoom, noReply,
serviceAddress);
}
else {
// Server does not support XEP-33 so try to send the packet to each recipient
if (noReply || replyTo != null ||
replyRoom != null) {
// Some specified XEP-33 features were requested so throw an exception alerting
// the user that this features are not available
throw new FeatureNotSupportedException("Extended Stanza Addressing");
}
// Send the packet to each individual recipient
sendToIndividualRecipients(connection, packet, to, cc, bcc);
}
}
/**
* Sends a reply to a previously received stanza that was sent to multiple recipients. Before
* attempting to send the reply message some checks are performed. If any of those checks
* fails, then an XMPPException is going to be thrown with the specific error detail.
*
* @param connection the connection to use to send the reply.
* @param original the previously received stanza that was sent to multiple recipients.
* @param reply the new message to send as a reply.
* @throws XMPPErrorException
* @throws InterruptedException
* @throws NotConnectedException
* @throws FeatureNotSupportedException
* @throws NoResponseException
*/
public static void reply(XMPPConnection connection, Message original, Message reply)
throws XMPPErrorException, InterruptedException, NotConnectedException, NoResponseException, FeatureNotSupportedException {
MultipleRecipientInfo info = getMultipleRecipientInfo(original);
if (info == null) {
throw new IllegalArgumentException("Original message does not contain multiple recipient info");
}
if (info.shouldNotReply()) {
throw new IllegalArgumentException("Original message should not be replied");
}
if (info.getReplyRoom() != null) {
throw new IllegalArgumentException("Reply should be sent through a room");
}
// Any element from the initial message MUST be copied into the reply.
if (original.getThread() != null) {
reply.setThread(original.getThread());
}
MultipleAddresses.Address replyAddress = info.getReplyAddress();
if (replyAddress != null && replyAddress.getJid() != null) {
// Send reply to the reply_to address
reply.setTo(replyAddress.getJid());
connection.sendStanza(reply);
}
else {
// Send reply to multiple recipients
List to = new ArrayList<>(info.getTOAddresses().size());
List cc = new ArrayList<>(info.getCCAddresses().size());
for (MultipleAddresses.Address jid : info.getTOAddresses()) {
to.add(jid.getJid());
}
for (MultipleAddresses.Address jid : info.getCCAddresses()) {
cc.add(jid.getJid());
}
// Add original sender as a 'to' address (if not already present)
if (!to.contains(original.getFrom()) && !cc.contains(original.getFrom())) {
to.add(original.getFrom());
}
// Remove the sender from the TO/CC list (try with bare JID too)
EntityFullJid from = connection.getUser();
if (!to.remove(from) && !cc.remove(from)) {
EntityBareJid bareJID = from.asEntityBareJid();
to.remove(bareJID);
cc.remove(bareJID);
}
send(connection, reply, to, cc, null, null, null, false);
}
}
/**
* Returns the {@link MultipleRecipientInfo} contained in the specified stanza or
* null if none was found. Only packets sent to multiple recipients will
* contain such information.
*
* @param packet the stanza to check.
* @return the MultipleRecipientInfo contained in the specified stanza or null
* if none was found.
*/
public static MultipleRecipientInfo getMultipleRecipientInfo(Stanza packet) {
MultipleAddresses extension = packet.getExtension(MultipleAddresses.ELEMENT, MultipleAddresses.NAMESPACE);
return extension == null ? null : new MultipleRecipientInfo(extension);
}
private static void sendToIndividualRecipients(XMPPConnection connection, Stanza packet,
Collection to, Collection cc, Collection bcc) throws NotConnectedException, InterruptedException {
if (to != null) {
for (Jid jid : to) {
packet.setTo(jid);
connection.sendStanza(new PacketCopy(packet.toXML()));
}
}
if (cc != null) {
for (Jid jid : cc) {
packet.setTo(jid);
connection.sendStanza(new PacketCopy(packet.toXML()));
}
}
if (bcc != null) {
for (Jid jid : bcc) {
packet.setTo(jid);
connection.sendStanza(new PacketCopy(packet.toXML()));
}
}
}
private static void sendThroughService(XMPPConnection connection, Stanza packet, Collection to,
Collection cc, Collection bcc, Jid replyTo, Jid replyRoom, boolean noReply,
DomainBareJid serviceAddress) throws NotConnectedException, InterruptedException {
// Create multiple recipient extension
MultipleAddresses multipleAddresses = new MultipleAddresses();
if (to != null) {
for (Jid jid : to) {
multipleAddresses.addAddress(MultipleAddresses.Type.to, jid, null, null, false, null);
}
}
if (cc != null) {
for (Jid jid : cc) {
multipleAddresses.addAddress(MultipleAddresses.Type.to, jid, null, null, false, null);
}
}
if (bcc != null) {
for (Jid jid : bcc) {
multipleAddresses.addAddress(MultipleAddresses.Type.bcc, jid, null, null, false, null);
}
}
if (noReply) {
multipleAddresses.setNoReply();
}
else {
if (replyTo != null) {
multipleAddresses
.addAddress(MultipleAddresses.Type.replyto, replyTo, null, null, false, null);
}
if (replyRoom != null) {
multipleAddresses.addAddress(MultipleAddresses.Type.replyroom, replyRoom, null, null,
false, null);
}
}
// Set the multiple recipient service address as the target address
packet.setTo(serviceAddress);
// Add extension to packet
packet.addExtension(multipleAddresses);
// Send the packet
connection.sendStanza(packet);
}
/**
* Returns the address of the multiple recipients service. To obtain such address service
* discovery is going to be used on the connected server and if none was found then another
* attempt will be tried on the server items. The discovered information is going to be
* cached for 24 hours.
*
* @param connection the connection to use for disco. The connected server is going to be
* queried.
* @return the address of the multiple recipients service or null if none was found.
* @throws NoResponseException if there was no response from the server.
* @throws XMPPErrorException
* @throws NotConnectedException
* @throws InterruptedException
*/
private static DomainBareJid getMultipleRecipientServiceAddress(XMPPConnection connection) throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException {
ServiceDiscoveryManager sdm = ServiceDiscoveryManager.getInstanceFor(connection);
return sdm.findService(MultipleAddresses.NAMESPACE, true);
}
/**
* Stanza that holds the XML stanza to send. This class is useful when the same packet
* is needed to be sent to different recipients. Since using the same stanza is not possible
* (i.e. cannot change the TO address of a queues stanza to be sent) then this class was
* created to keep the XML stanza to send.
*/
private static final class PacketCopy extends Stanza {
private final CharSequence text;
/**
* Create a copy of a stanza with the text to send. The passed text must be a valid text to
* send to the server, no validation will be done on the passed text.
*
* @param text the whole text of the stanza to send
*/
private PacketCopy(CharSequence text) {
this.text = text;
}
@Override
public CharSequence toXML(org.jivesoftware.smack.packet.XmlEnvironment enclosingNamespace) {
return text;
}
@Override
public String toString() {
return toXML().toString();
}
}
}
