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/*
* SIP Communicator, the OpenSource Java VoIP and Instant Messaging client.
*
* Distributable under LGPL license.
* See terms of license at gnu.org.
*/
package net.java.sip.communicator.impl.protocol.icq;
import java.util.*;
import net.java.sip.communicator.service.protocol.*;
import net.java.sip.communicator.service.protocol.Message;
import net.java.sip.communicator.service.protocol.event.*;
import net.java.sip.communicator.util.*;
import net.kano.joscar.*;
import net.kano.joscar.flapcmd.*;
import net.kano.joscar.snac.*;
import net.kano.joscar.snaccmd.error.*;
import net.kano.joscar.snaccmd.icq.*;
import net.kano.joustsim.*;
import net.kano.joustsim.oscar.oscar.service.icbm.*;
import net.java.sip.communicator.service.protocol.icqconstants.*;
/**
* A straightforward implementation of the basic instant messaging operation
* set.
*
* @author Emil Ivov
* @author Damian Minkov
*/
public class OperationSetBasicInstantMessagingIcqImpl
implements OperationSetBasicInstantMessaging
{
private static final Logger logger =
Logger.getLogger(OperationSetBasicInstantMessagingIcqImpl.class);
/**
* A list of listeneres registered for message events.
*/
private Vector messageListeners = new Vector();
/**
* The icq provider that created us.
*/
private ProtocolProviderServiceIcqImpl icqProvider = null;
/**
* The registration listener that would get notified when the unerlying
* icq provider gets registered.
*/
private RegistrationStateListener providerRegListener
= new RegistrationStateListener();
/**
* The listener that would receive instant messaging events from oscar.jar
*/
private JoustSimIcbmListener joustSimIcbmListener
= new JoustSimIcbmListener();
/**
* The listener that would receive conversation events from oscar.jar
*/
private JoustSimConversationListener joustSimConversationListener
= new JoustSimConversationListener();
/**
* A reference to the persistent presence operation set that we use
* to match incoming messages to <tt>Contact</tt>s and vice versa.
*/
private OperationSetPersistentPresenceIcqImpl opSetPersPresence = null;
/**
* The maximum message length allowed by the icq protocol as reported by
* Pavel Tankov.
*/
private static final int MAX_MSG_LEN = 2047;
/**
* I do not why but we sometimes receive messages with a date in the future.sdf
* I've decided to ignore such messages. I draw the line on
* currentTimeMillis() + ONE_DAY milliseconds. Anything with a date farther
* in the future is considered bogus and its date is replaced with current
* time millis.
*/
private static final long ONE_DAY = 86400001;
/**
* KeepAlive interval for sending packets
*/
private final static long KEEPALIVE_INTERVAL = 180000l; // 3 minutes
/**
* The interval after which a packet is considered to be lost
*/
private final static long KEEPALIVE_WAIT = 20000l; //20 secs
private final String defaultHtmlStartTag = "<HTML><BODY>";
private final String defaultHtmlEndTag = "</BODY></HTML>";
/**
* The task sending packets
*/
private KeepAliveSendTask keepAliveSendTask = null;
/**
* The timer executing tasks on specified intervals
*/
private Timer keepAliveTimer = null;
/**
* The queue holding the received packets
*/
private LinkedList receivedKeepAlivePackets = new LinkedList();
/**
* The ping message prefix that we use in our keep alive thread.
*/
private static String SYS_MSG_PREFIX_TEST
= "SIP COMMUNICATOR SYSTEM MESSAGE!";
/**
* Creates an instance of this operation set.
* @param icqProvider a ref to the <tt>ProtocolProviderServiceIcqImpl</tt>
* that created us and that we'll use for retrieving the underlying aim
* connection.
*/
OperationSetBasicInstantMessagingIcqImpl(
ProtocolProviderServiceIcqImpl icqProvider)
{
this.icqProvider = icqProvider;
icqProvider.addRegistrationStateChangeListener(providerRegListener);
}
/**
* Registeres a MessageListener with this operation set so that it gets
* notifications of successful message delivery, failure or reception of
* incoming messages..
*
* @param listener the <tt>MessageListener</tt> to register.
*/
public void addMessageListener(MessageListener listener)
{
synchronized(messageListeners)
{
if(!messageListeners.contains(listener))
this.messageListeners.add(listener);
}
}
/**
* Unregisteres <tt>listener</tt> so that it won't receive any further
* notifications upon successful message delivery, failure or reception of
* incoming messages..
*
* @param listener the <tt>MessageListener</tt> to unregister.
*/
public void removeMessageListener(MessageListener listener)
{
synchronized(messageListeners)
{
this.messageListeners.remove(listener);
}
}
/**
* Create a Message instance for sending arbitrary MIME-encoding content.
*
* @param content content value
* @param contentType the MIME-type for <tt>content</tt>
* @param contentEncoding encoding used for <tt>content</tt>
* @param subject a <tt>String</tt> subject or <tt>null</tt> for now subject.
* @return the newly created message.
*/
public Message createMessage(byte[] content, String contentType,
String contentEncoding, String subject)
{
return new MessageIcqImpl( new String(content),
contentType,
contentEncoding,
subject,
null);
}
/**
* Create a Message instance for sending a simple text messages with
* default (text/plain) content type and encoding.
*
* @param messageText the string content of the message.
* @return Message the newly created message
*/
public Message createMessage(String messageText)
{
return new MessageIcqImpl(messageText, DEFAULT_MIME_TYPE
, DEFAULT_MIME_ENCODING, null, null);
}
/**
* Sends the <tt>message</tt> to the destination indicated by the
* <tt>to</tt> contact.
*
* @param to the <tt>Contact</tt> to send <tt>message</tt> to
* @param message the <tt>Message</tt> to send.
* @throws java.lang.IllegalStateException if the underlying ICQ stack is
* not registered and initialized.
* @throws java.lang.IllegalArgumentException if <tt>to</tt> is not an
* instance of ContactIcqImpl.
*/
public void sendInstantMessage(Contact to, Message message)
throws IllegalStateException, IllegalArgumentException
{
assertConnected();
if( !(to instanceof ContactIcqImpl) )
throw new IllegalArgumentException(
"The specified contact is not a Icq contact."
+ to);
ImConversation imConversation =
icqProvider.getAimConnection().getIcbmService().
getImConversation(
new Screenname(to.getAddress()));
String messageContent = null;
if (message.getContentType().equals(HTML_MIME_TYPE)
&& !message.getContent().startsWith(defaultHtmlStartTag))
{
messageContent = defaultHtmlStartTag
+ message.getContent()
+ defaultHtmlEndTag;
}
else
messageContent = message.getContent();
if (to.getPresenceStatus().isOnline())
{
//do not add the conversation listener in here. we'll add it
//inside the icbm listener
imConversation.sendMessage(new SimpleMessage(messageContent));
}
else
imConversation.sendMessage(new SimpleMessage(messageContent), true);
MessageDeliveredEvent msgDeliveredEvt
= new MessageDeliveredEvent(
message, to, new Date());
fireMessageEvent(msgDeliveredEvt);
}
/**
* Retreives all offline Messages If any.
* Then delete them from the server.
*
* @param listener the <tt>MessageListener</tt> receiving the messages.
*/
private static int offlineMessageRequestID = 0;
private void retreiveOfflineMessages()
{
int requestID = offlineMessageRequestID++;
OfflineMsgIcqRequest offlineMsgsReq =
new OfflineMsgIcqRequest(
Long.parseLong(
icqProvider.getAimSession().getScreenname().getNormal()),
requestID
);
OfflineMessagesRetriever responseRetriever =
new OfflineMessagesRetriever(requestID);
SnacRequest snReq = new SnacRequest(offlineMsgsReq, responseRetriever);
icqProvider.getAimConnection().getInfoService().
getOscarConnection().sendSnacRequest(snReq);
}
private class OfflineMessagesRetriever
extends SnacRequestAdapter
{
private int requestID;
public OfflineMessagesRetriever(int requestID)
{
this.requestID = requestID;
}
public void handleResponse(SnacResponseEvent evt)
{
SnacCommand snac = evt.getSnacCommand();
logger.debug("Received a response to our offline message request: " +
snac);
if (snac instanceof OfflineMsgIcqCmd)
{
OfflineMsgIcqCmd offlineMsgCmd = (OfflineMsgIcqCmd) snac;
String contactUIN = String.valueOf(offlineMsgCmd.getFromUIN());
Contact sourceContact =
opSetPersPresence.findContactByID(contactUIN);
if (sourceContact == null)
{
logger.debug(
"received a message from a unknown contact: "
+ contactUIN);
//create the volatile contact
sourceContact = opSetPersPresence
.createVolatileContact(contactUIN);
}
//some messages arrive far away in the future for some
//reason that I currently don't know. Until we find it
//(which may well be never) we are putting in an agly hack
//ignoring messages with a date beyond tomorrow.
long current = System.currentTimeMillis();
long msgDate = offlineMsgCmd.getDate().getTime();
if( (current + ONE_DAY) > msgDate )
msgDate = current;
MessageReceivedEvent msgReceivedEvt
= new MessageReceivedEvent(
createMessage(offlineMsgCmd.getContents()),
sourceContact,
new Date(msgDate));
logger.debug("fire msg received for : " +
offlineMsgCmd.getContents());
fireMessageEvent(msgReceivedEvt);
}
else if (snac instanceof OfflineMsgDoneCmd)
{
logger.debug("send ack to delete offline messages");
OfflineMsgIcqAckCmd offlineMsgDeleteReq = new
OfflineMsgIcqAckCmd(
Long.parseLong(
icqProvider.getAimSession().getScreenname().
getNormal()),
requestID
);
icqProvider.getAimConnection().getInfoService().
getOscarConnection().sendSnac(offlineMsgDeleteReq);
}
else if (snac instanceof SnacError)
{
logger.debug("error receiving offline messages");
}
}
}
/**
* Utility method throwing an exception if the icq stack is not properly
* initialized.
* @throws java.lang.IllegalStateException if the underlying ICQ stack is
* not registered and initialized.
*/
private void assertConnected() throws IllegalStateException
{
if (icqProvider == null)
throw new IllegalStateException(
"The icq provider must be non-null and signed on the ICQ "
+"service before being able to communicate.");
if (!icqProvider.isRegistered())
throw new IllegalStateException(
"The icq provider must be signed on the ICQ service before "
+"being able to communicate.");
}
/**
* Determines wheter the protocol provider (or the protocol itself) support
* sending and receiving offline messages. Most often this method would
* return true for protocols that support offline messages and false for
* those that don't. It is however possible for a protocol to support these
* messages and yet have a particular account that does not (i.e. feature
* not enabled on the protocol server). In cases like this it is possible
* for this method to return true even when offline messaging is not
* supported, and then have the sendMessage method throw an
* OperationFailedException with code - OFFLINE_MESSAGES_NOT_SUPPORTED.
*
* @return <tt>true</tt> if the protocol supports offline messages and
* <tt>false</tt> otherwise.
*/
public boolean isOfflineMessagingSupported()
{
if(icqProvider.USING_ICQ)
return true;
else
return false;
}
/**
* Determines wheter the protocol supports the supplied content type
*
* @param contentType the type we want to check
* @return <tt>true</tt> if the protocol supports it and
* <tt>false</tt> otherwise.
*/
public boolean isContentTypeSupported(String contentType)
{
if(contentType.equals(DEFAULT_MIME_TYPE) ||
(contentType.equals(HTML_MIME_TYPE)))
return true;
else
return false;
}
/**
* Our listener that will tell us when we're registered to icq and joust
* sim is ready to accept us as a listener.
*/
private class RegistrationStateListener
implements RegistrationStateChangeListener
{
/**
* The method is called by a ProtocolProvider implementation whenver
* a change in the registration state of the corresponding provider had
* occurred.
* @param evt ProviderStatusChangeEvent the event describing the status
* change.
*/
public void registrationStateChanged(RegistrationStateChangeEvent evt)
{
logger.debug("The ICQ provider changed state from: "
+ evt.getOldState()
+ " to: " + evt.getNewState());
if (evt.getNewState() == RegistrationState.REGISTERED)
{
logger.debug("adding a Bos Service Listener");
icqProvider.getAimConnection().getIcbmService()
.addIcbmListener(joustSimIcbmListener);
opSetPersPresence = (OperationSetPersistentPresenceIcqImpl)
icqProvider.getSupportedOperationSets()
.get(OperationSetPersistentPresence.class.getName());
if(icqProvider.USING_ICQ)
retreiveOfflineMessages();
String customMessageEncoding = null;
if((customMessageEncoding =
System.getProperty("icq.custom.message.charset")) != null)
OscarTools.setDefaultCharset(customMessageEncoding);
// run keepalive thread
if(keepAliveSendTask == null)
{
//Temporarily disable keep alives as they seem to be causing trouble
// keepAliveSendTask = new KeepAliveSendTask();
// keepAliveTimer = new Timer();
// keepAliveTimer.scheduleAtFixedRate(
// keepAliveSendTask, KEEPALIVE_INTERVAL, KEEPALIVE_INTERVAL);
}
}
else
if (evt.getNewState() == RegistrationState.UNREGISTERED)
{
// stop keepalive thread
if (keepAliveSendTask != null)
{
keepAliveSendTask.cancel();
keepAliveTimer.cancel();
keepAliveSendTask = null;
keepAliveTimer = null;
}
}
}
}
/**
* Delivers the specified event to all registered message listeners.
* @param evt the <tt>EventObject</tt> that we'd like delivered to all
* registered message listerners.
*/
private void fireMessageEvent(EventObject evt)
{
Iterator listeners = null;
synchronized (messageListeners)
{
listeners = new ArrayList(messageListeners).iterator();
}
while (listeners.hasNext())
{
MessageListener listener
= (MessageListener) listeners.next();
if (evt instanceof MessageDeliveredEvent)
{
listener.messageDelivered( (MessageDeliveredEvent) evt);
}
else if (evt instanceof MessageReceivedEvent)
{
listener.messageReceived( (MessageReceivedEvent) evt);
}
else if (evt instanceof MessageDeliveryFailedEvent)
{
listener.messageDeliveryFailed(
(MessageDeliveryFailedEvent) evt);
}
}
}
/**
* The listener that would retrieve instant messaging events from oscar.jar.
*/
private class JoustSimIcbmListener implements IcbmListener
{
/**
* Register our icbm listener so that we get notified when new
* conversations are cretaed and register ourselvers as listeners in
* them.
*
* @param service the <tt>IcbmService</tt> that is clling us
* @param conv the <tt>Conversation</tt> that has just been created.
*/
public void newConversation(IcbmService service, Conversation conv)
{
conv.addConversationListener(joustSimConversationListener);
}
/**
* Currently Unused.
* @param service Currently Unused.
* @param buddy Currently Unused.
* @param info Currently Unused.
*/
public void buddyInfoUpdated(IcbmService service, Screenname buddy,
IcbmBuddyInfo info)
{
logger.debug("buddy info pudated for " + buddy
+ " new info is: " + info);
}
public void sendAutomaticallyFailed(
IcbmService service,
net.kano.joustsim.oscar.oscar.service.icbm.Message message,
Set triedConversations)
{
logger.debug("sendAutomaticallyFailed message : " + message);
}
}
/**
* Joust SIM supports the notion of instant messaging conversations and
* all message events are delivered through this listener. Right now we
* won't burden ourselves with conversations and would simply deliver
* events as we get them. If we need conversation support we'll implement it
* some other day.
*/
private class JoustSimConversationListener implements ImConversationListener
{
/**
* Create a corresponding message object and fire a
* <tt>MessageReceivedEvent</tt>.
*
* @param conversation the conversation where the message is received in.
* @param minfo informtion about the received message
*/
public void gotMessage(Conversation conversation, MessageInfo minfo)
{
String msgBody = minfo.getMessage().getMessageBody();
if(logger.isDebugEnabled())
logger.debug("Received from "
+ conversation.getBuddy()
+ " the message "
+ msgBody);
if(msgBody.startsWith(SYS_MSG_PREFIX_TEST)
&& conversation.getBuddy().getFormatted().
equals(icqProvider.getAccountID().getUserID()))
{
receivedKeepAlivePackets.addLast(msgBody);
return;
}
String msgContent;
if (msgBody.startsWith(defaultHtmlStartTag))
{
msgContent = msgBody.substring(
msgBody.indexOf(defaultHtmlStartTag)
+ defaultHtmlStartTag.length(),
msgBody.indexOf(defaultHtmlEndTag));
}
else
msgContent = msgBody;
Message newMessage = createMessage(msgContent.getBytes(),
HTML_MIME_TYPE, DEFAULT_MIME_ENCODING, null);
Contact sourceContact =
opSetPersPresence.findContactByID( conversation.getBuddy()
.getFormatted());
if(sourceContact == null)
{
logger.debug("received a message from a unknown contact: "
+ conversation.getBuddy());
//create the volatile contact
sourceContact = opSetPersPresence
.createVolatileContact(
conversation.getBuddy().getFormatted());
}
//some messages arrive far away in the future for some
//reason that I currently don't know. Until we find it
//(which may well be never) we are putting in an agly hack
//ignoring messages with a date beyond tomorrow.
long current = System.currentTimeMillis();
long msgDate = minfo.getTimestamp().getTime();
if ( (current + ONE_DAY) > msgDate)
msgDate = current;
MessageReceivedEvent msgReceivedEvt
= new MessageReceivedEvent(
newMessage, sourceContact , new Date(msgDate) );
fireMessageEvent(msgReceivedEvt);
}
public void sentOtherEvent(Conversation conversation,
ConversationEventInfo event)
{}
public void canSendMessageChanged(Conversation conv, boolean canSend)
{}
public void conversationClosed(Conversation conv)
{}
public void conversationOpened(Conversation conv)
{}
public void gotOtherEvent(Conversation conversation,
ConversationEventInfo event)
{}
public void sentMessage(Conversation conv, MessageInfo minfo)
{
/**@todo implement sentMessage() */
/**
* there's no id in this event and besides we have no message failed
* method so refiring an event here would be difficult.
*
* we'll deal with that some other day.
*/
}
public void missedMessages(ImConversation conv, MissedImInfo info)
{
/**@todo implement missedMessages() */
}
public void gotTypingState(Conversation conversation,
TypingInfo typingInfo)
{
//typing events are handled in OperationSetTypingNotifications
}
}
/**
* Task sending packets on intervals.
* The task is runned on specified intervals by the keepAliveTimer
*/
private class KeepAliveSendTask
extends TimerTask
{
public void run()
{
try
{
// if we are not registerd do nothing
if(!icqProvider.isRegistered())
return;
StringBuffer sysMsg = new StringBuffer(SYS_MSG_PREFIX_TEST);
sysMsg.append("pp:").append(icqProvider.hashCode()).
append("&op:").append(
OperationSetBasicInstantMessagingIcqImpl.this.hashCode());
ImConversation imConversation =
icqProvider.getAimConnection().getIcbmService().
getImConversation(
new Screenname(icqProvider.getAccountID().getUserID()));
// schedule the check task
keepAliveTimer.schedule(
new KeepAliveCheckTask(), KEEPALIVE_WAIT);
logger.trace("send keepalive");
imConversation.sendMessage(new SimpleMessage(sysMsg.toString()));
}
catch (Exception ex)
{
logger.error("Failed to start keep alive task.", ex);
}
}
}
/**
* Check if the first received packet in the queue
* is ok and if its not or the queue has no received packets
* the this means there is some network problem, so fire event
*/
private class KeepAliveCheckTask
extends TimerTask
{
public void run()
{
try
{
// check till we find a correct message
// or if NoSuchElementException is thrown
// there is no message
while(!checkFirstPacket())
{}
}
catch (Exception ex)
{
logger.error(
"Exception occurred while retrieving keep alive packet."
, ex);
fireUnregistered();
}
}
/**
* Checks whether first packet in queue is ok
* @return boolean
* @throws Exception
*/
boolean checkFirstPacket()
throws Exception
{
String receivedStr =
(String)receivedKeepAlivePackets.removeLast();
logger.trace("Last keep alive message is: " + receivedStr);
receivedStr = receivedStr.replaceAll(SYS_MSG_PREFIX_TEST, "");
String[] ss = receivedStr.split("&");
String provHashStr = ss[0].split(":")[1];
String opsetHashStr = ss[1].split(":")[1];
if(icqProvider.hashCode() != Integer.parseInt(provHashStr)
|| OperationSetBasicInstantMessagingIcqImpl.this.hashCode()
!= Integer.parseInt(opsetHashStr) )
{
return false;
}
else
{
return true;
}
}
/**
* Fire Unregistered event
*/
private void fireUnregistered()
{
icqProvider.fireRegistrationStateChanged(
icqProvider.getRegistrationState()
, RegistrationState.CONNECTION_FAILED
, RegistrationStateChangeEvent.REASON_INTERNAL_ERROR
, "Did not receive last keep alive packet.");
if(icqProvider.USING_ICQ)
opSetPersPresence.fireProviderPresenceStatusChangeEvent(
opSetPersPresence.getPresenceStatus().getStatus()
, IcqStatusEnum.OFFLINE.getStatus());
else
opSetPersPresence.fireProviderPresenceStatusChangeEvent(
opSetPersPresence.getPresenceStatus().getStatus()
, AimStatusEnum.OFFLINE.getStatus());
}
}
}
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