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Diffstat (limited to 'src/org/jivesoftware/smackx/receipts/DeliveryReceiptManager.java')
-rw-r--r-- | src/org/jivesoftware/smackx/receipts/DeliveryReceiptManager.java | 202 |
1 files changed, 202 insertions, 0 deletions
diff --git a/src/org/jivesoftware/smackx/receipts/DeliveryReceiptManager.java b/src/org/jivesoftware/smackx/receipts/DeliveryReceiptManager.java new file mode 100644 index 0000000..125b87e --- /dev/null +++ b/src/org/jivesoftware/smackx/receipts/DeliveryReceiptManager.java @@ -0,0 +1,202 @@ +/** + * Copyright 2013 Georg Lukas + * + * All rights reserved. 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.receipts; + +import java.util.Collections; +import java.util.HashSet; +import java.util.Map; +import java.util.Set; +import java.util.WeakHashMap; + +import org.jivesoftware.smack.Connection; +import org.jivesoftware.smack.ConnectionCreationListener; +import org.jivesoftware.smack.PacketListener; +import org.jivesoftware.smack.XMPPException; +import org.jivesoftware.smack.filter.PacketExtensionFilter; +import org.jivesoftware.smack.packet.Message; +import org.jivesoftware.smack.packet.Packet; +import org.jivesoftware.smackx.ServiceDiscoveryManager; +import org.jivesoftware.smackx.packet.DiscoverInfo; + +/** + * Manager for XEP-0184: Message Delivery Receipts. This class implements + * the manager for {@link DeliveryReceipt} support, enabling and disabling of + * automatic DeliveryReceipt transmission. + * + * @author Georg Lukas + */ +public class DeliveryReceiptManager implements PacketListener { + + private static Map<Connection, DeliveryReceiptManager> instances = + Collections.synchronizedMap(new WeakHashMap<Connection, DeliveryReceiptManager>()); + + static { + Connection.addConnectionCreationListener(new ConnectionCreationListener() { + public void connectionCreated(Connection connection) { + new DeliveryReceiptManager(connection); + } + }); + } + + private Connection connection; + private boolean auto_receipts_enabled = false; + private Set<ReceiptReceivedListener> receiptReceivedListeners = Collections + .synchronizedSet(new HashSet<ReceiptReceivedListener>()); + + private DeliveryReceiptManager(Connection connection) { + ServiceDiscoveryManager sdm = ServiceDiscoveryManager.getInstanceFor(connection); + sdm.addFeature(DeliveryReceipt.NAMESPACE); + this.connection = connection; + instances.put(connection, this); + + // register listener for delivery receipts and requests + connection.addPacketListener(this, new PacketExtensionFilter(DeliveryReceipt.NAMESPACE)); + } + + /** + * Obtain the DeliveryReceiptManager responsible for a connection. + * + * @param connection the connection object. + * + * @return the DeliveryReceiptManager instance for the given connection + */ + synchronized public static DeliveryReceiptManager getInstanceFor(Connection connection) { + DeliveryReceiptManager receiptManager = instances.get(connection); + + if (receiptManager == null) { + receiptManager = new DeliveryReceiptManager(connection); + } + + return receiptManager; + } + + /** + * Returns true if Delivery Receipts are supported by a given JID + * + * @param jid + * @return true if supported + */ + public boolean isSupported(String jid) { + try { + DiscoverInfo result = + ServiceDiscoveryManager.getInstanceFor(connection).discoverInfo(jid); + return result.containsFeature(DeliveryReceipt.NAMESPACE); + } + catch (XMPPException e) { + return false; + } + } + + // handle incoming receipts and receipt requests + @Override + public void processPacket(Packet packet) { + DeliveryReceipt dr = (DeliveryReceipt)packet.getExtension( + DeliveryReceipt.ELEMENT, DeliveryReceipt.NAMESPACE); + if (dr != null) { + // notify listeners of incoming receipt + for (ReceiptReceivedListener l : receiptReceivedListeners) { + l.onReceiptReceived(packet.getFrom(), packet.getTo(), dr.getId()); + } + + } + + // if enabled, automatically send a receipt + if (auto_receipts_enabled) { + DeliveryReceiptRequest drr = (DeliveryReceiptRequest)packet.getExtension( + DeliveryReceiptRequest.ELEMENT, DeliveryReceipt.NAMESPACE); + if (drr != null) { + Message ack = new Message(packet.getFrom(), Message.Type.normal); + ack.addExtension(new DeliveryReceipt(packet.getPacketID())); + connection.sendPacket(ack); + } + } + } + + /** + * Configure whether the {@link DeliveryReceiptManager} should automatically + * reply to incoming {@link DeliveryReceipt}s. By default, this feature is off. + * + * @param new_state whether automatic transmission of + * DeliveryReceipts should be enabled or disabled + */ + public void setAutoReceiptsEnabled(boolean new_state) { + auto_receipts_enabled = new_state; + } + + /** + * Helper method to enable automatic DeliveryReceipt transmission. + */ + public void enableAutoReceipts() { + setAutoReceiptsEnabled(true); + } + + /** + * Helper method to disable automatic DeliveryReceipt transmission. + */ + public void disableAutoReceipts() { + setAutoReceiptsEnabled(false); + } + + /** + * Check if AutoReceipts are enabled on this connection. + */ + public boolean getAutoReceiptsEnabled() { + return this.auto_receipts_enabled; + } + + /** + * Get informed about incoming delivery receipts with a {@link ReceiptReceivedListener}. + * + * @param listener the listener to be informed about new receipts + */ + public void addReceiptReceivedListener(ReceiptReceivedListener listener) { + receiptReceivedListeners.add(listener); + } + + /** + * Stop getting informed about incoming delivery receipts. + * + * @param listener the listener to be removed + */ + public void removeReceiptReceivedListener(ReceiptReceivedListener listener) { + receiptReceivedListeners.remove(listener); + } + + /** + * Test if a packet requires a delivery receipt. + * + * @param p Packet object to check for a DeliveryReceiptRequest + * + * @return true if a delivery receipt was requested + */ + public static boolean hasDeliveryReceiptRequest(Packet p) { + return (p.getExtension(DeliveryReceiptRequest.ELEMENT, + DeliveryReceipt.NAMESPACE) != null); + } + + /** + * Add a delivery receipt request to an outgoing packet. + * + * Only message packets may contain receipt requests as of XEP-0184, + * therefore only allow Message as the parameter type. + * + * @param m Message object to add a request to + */ + public static void addDeliveryReceiptRequest(Message m) { + m.addExtension(new DeliveryReceiptRequest()); + } +} |