XmppConnectionService.java

   1package eu.siacs.conversations.services;
   2
   3import java.security.SecureRandom;
   4import java.text.SimpleDateFormat;
   5import java.util.ArrayList;
   6import java.util.Collections;
   7import java.util.Comparator;
   8import java.util.Date;
   9import java.util.Hashtable;
  10import java.util.List;
  11import java.util.Locale;
  12import java.util.TimeZone;
  13import java.util.concurrent.CopyOnWriteArrayList;
  14
  15import org.openintents.openpgp.util.OpenPgpApi;
  16import org.openintents.openpgp.util.OpenPgpServiceConnection;
  17
  18import de.duenndns.ssl.MemorizingTrustManager;
  19
  20import net.java.otr4j.OtrException;
  21import net.java.otr4j.session.Session;
  22import net.java.otr4j.session.SessionStatus;
  23import eu.siacs.conversations.crypto.PgpEngine;
  24import eu.siacs.conversations.entities.Account;
  25import eu.siacs.conversations.entities.Bookmark;
  26import eu.siacs.conversations.entities.Contact;
  27import eu.siacs.conversations.entities.Conversation;
  28import eu.siacs.conversations.entities.Message;
  29import eu.siacs.conversations.entities.MucOptions;
  30import eu.siacs.conversations.entities.MucOptions.OnRenameListener;
  31import eu.siacs.conversations.entities.Presences;
  32import eu.siacs.conversations.generator.MessageGenerator;
  33import eu.siacs.conversations.generator.PresenceGenerator;
  34import eu.siacs.conversations.parser.IqParser;
  35import eu.siacs.conversations.parser.MessageParser;
  36import eu.siacs.conversations.parser.PresenceParser;
  37import eu.siacs.conversations.persistance.DatabaseBackend;
  38import eu.siacs.conversations.persistance.FileBackend;
  39import eu.siacs.conversations.ui.UiCallback;
  40import eu.siacs.conversations.utils.CryptoHelper;
  41import eu.siacs.conversations.utils.ExceptionHelper;
  42import eu.siacs.conversations.utils.OnPhoneContactsLoadedListener;
  43import eu.siacs.conversations.utils.PRNGFixes;
  44import eu.siacs.conversations.utils.PhoneHelper;
  45import eu.siacs.conversations.utils.UIHelper;
  46import eu.siacs.conversations.xml.Element;
  47import eu.siacs.conversations.xmpp.OnBindListener;
  48import eu.siacs.conversations.xmpp.OnContactStatusChanged;
  49import eu.siacs.conversations.xmpp.OnIqPacketReceived;
  50import eu.siacs.conversations.xmpp.OnStatusChanged;
  51import eu.siacs.conversations.xmpp.OnTLSExceptionReceived;
  52import eu.siacs.conversations.xmpp.XmppConnection;
  53import eu.siacs.conversations.xmpp.jingle.JingleConnectionManager;
  54import eu.siacs.conversations.xmpp.jingle.OnJinglePacketReceived;
  55import eu.siacs.conversations.xmpp.jingle.stanzas.JinglePacket;
  56import eu.siacs.conversations.xmpp.stanzas.IqPacket;
  57import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
  58import eu.siacs.conversations.xmpp.stanzas.PresencePacket;
  59import android.annotation.SuppressLint;
  60import android.app.AlarmManager;
  61import android.app.PendingIntent;
  62import android.app.Service;
  63import android.content.Context;
  64import android.content.Intent;
  65import android.content.SharedPreferences;
  66import android.database.ContentObserver;
  67import android.net.ConnectivityManager;
  68import android.net.NetworkInfo;
  69import android.net.Uri;
  70import android.os.Binder;
  71import android.os.Bundle;
  72import android.os.IBinder;
  73import android.os.PowerManager;
  74import android.os.PowerManager.WakeLock;
  75import android.os.SystemClock;
  76import android.preference.PreferenceManager;
  77import android.provider.ContactsContract;
  78import android.util.Log;
  79
  80public class XmppConnectionService extends Service {
  81
  82	protected static final String LOGTAG = "xmppService";
  83	public DatabaseBackend databaseBackend;
  84	private FileBackend fileBackend;
  85
  86	public long startDate;
  87
  88	private static final int PING_MAX_INTERVAL = 300;
  89	private static final int PING_MIN_INTERVAL = 30;
  90	private static final int PING_TIMEOUT = 10;
  91	private static final int CONNECT_TIMEOUT = 90;
  92	public static final long CARBON_GRACE_PERIOD = 60000L;
  93
  94	private static String ACTION_MERGE_PHONE_CONTACTS = "merge_phone_contacts";
  95	
  96	private MemorizingTrustManager mMemorizingTrustManager;
  97
  98	private MessageParser mMessageParser = new MessageParser(this);
  99	private PresenceParser mPresenceParser = new PresenceParser(this);
 100	private IqParser mIqParser = new IqParser(this);
 101	private MessageGenerator mMessageGenerator = new MessageGenerator();
 102	private PresenceGenerator mPresenceGenerator = new PresenceGenerator();
 103	
 104	private List<Account> accounts;
 105	private CopyOnWriteArrayList<Conversation> conversations = null;
 106	private JingleConnectionManager mJingleConnectionManager = new JingleConnectionManager(
 107			this);
 108
 109	private OnConversationUpdate mOnConversationUpdate = null;
 110	private int convChangedListenerCount = 0;
 111	private OnAccountUpdate mOnAccountUpdate = null;
 112	private OnRosterUpdate mOnRosterUpdate = null;
 113	public OnContactStatusChanged onContactStatusChanged = new OnContactStatusChanged() {
 114
 115		@Override
 116		public void onContactStatusChanged(Contact contact, boolean online) {
 117			Conversation conversation = find(getConversations(),contact);
 118			if (conversation != null) {
 119				conversation.endOtrIfNeeded();
 120				if (online && (contact.getPresences().size() == 1)) {
 121					sendUnsendMessages(conversation);
 122				}
 123			}
 124		}
 125	};
 126
 127	private SecureRandom mRandom;
 128
 129	private ContentObserver contactObserver = new ContentObserver(null) {
 130		@Override
 131		public void onChange(boolean selfChange) {
 132			super.onChange(selfChange);
 133			Intent intent = new Intent(getApplicationContext(),
 134					XmppConnectionService.class);
 135			intent.setAction(ACTION_MERGE_PHONE_CONTACTS);
 136			startService(intent);
 137		}
 138	};
 139
 140	private final IBinder mBinder = new XmppConnectionBinder();
 141	private OnStatusChanged statusListener = new OnStatusChanged() {
 142
 143		@Override
 144		public void onStatusChanged(Account account) {
 145			if (mOnAccountUpdate != null) {
 146				mOnAccountUpdate.onAccountUpdate();;
 147			}
 148			if (account.getStatus() == Account.STATUS_ONLINE) {
 149				for(Conversation conversation : account.pendingConferenceLeaves) {
 150					leaveMuc(conversation);
 151				}
 152				for(Conversation conversation : account.pendingConferenceJoins) {
 153					joinMuc(conversation);
 154				}
 155				mJingleConnectionManager.cancelInTransmission();
 156				List<Conversation> conversations = getConversations();
 157				for (int i = 0; i < conversations.size(); ++i) {
 158					if (conversations.get(i).getAccount() == account) {
 159						conversations.get(i).startOtrIfNeeded();
 160						sendUnsendMessages(conversations.get(i));
 161					}
 162				}
 163				syncDirtyContacts(account);
 164				scheduleWakeupCall(PING_MAX_INTERVAL, true);
 165			} else if (account.getStatus() == Account.STATUS_OFFLINE) {
 166				if (!account.isOptionSet(Account.OPTION_DISABLED)) {
 167					int timeToReconnect = mRandom.nextInt(50) + 10;
 168					scheduleWakeupCall(timeToReconnect, false);
 169				}
 170
 171			} else if (account.getStatus() == Account.STATUS_REGISTRATION_SUCCESSFULL) {
 172				databaseBackend.updateAccount(account);
 173				reconnectAccount(account, true);
 174			} else if ((account.getStatus() != Account.STATUS_CONNECTING)
 175					&& (account.getStatus() != Account.STATUS_NO_INTERNET)) {
 176				int next = account.getXmppConnection().getTimeToNextAttempt();
 177				Log.d(LOGTAG, account.getJid()
 178						+ ": error connecting account. try again in " + next
 179						+ "s for the "
 180						+ (account.getXmppConnection().getAttempt() + 1)
 181						+ " time");
 182				scheduleWakeupCall(next, false);
 183			}
 184			UIHelper.showErrorNotification(getApplicationContext(),
 185					getAccounts());
 186		}
 187	};
 188
 189	private OnJinglePacketReceived jingleListener = new OnJinglePacketReceived() {
 190
 191		@Override
 192		public void onJinglePacketReceived(Account account, JinglePacket packet) {
 193			mJingleConnectionManager.deliverPacket(account, packet);
 194		}
 195	};
 196
 197	private OpenPgpServiceConnection pgpServiceConnection;
 198	private PgpEngine mPgpEngine = null;
 199	private Intent pingIntent;
 200	private PendingIntent pendingPingIntent = null;
 201	private WakeLock wakeLock;
 202	private PowerManager pm;
 203	private OnBindListener mOnBindListener = new OnBindListener() {
 204
 205			@Override
 206			public void onBind(final Account account) {
 207				account.getRoster().clearPresences();
 208				account.clearPresences(); // self presences
 209				account.pendingConferenceJoins.clear();
 210				account.pendingConferenceLeaves.clear();
 211				fetchRosterFromServer(account);
 212				fetchBookmarks(account);
 213				sendPresencePacket(account, mPresenceGenerator.sendPresence(account));
 214				connectMultiModeConversations(account);
 215				updateConversationUi();
 216			}
 217		};
 218
 219	public PgpEngine getPgpEngine() {
 220		if (pgpServiceConnection.isBound()) {
 221			if (this.mPgpEngine == null) {
 222				this.mPgpEngine = new PgpEngine(new OpenPgpApi(
 223						getApplicationContext(),
 224						pgpServiceConnection.getService()), this);
 225			}
 226			return mPgpEngine;
 227		} else {
 228			return null;
 229		}
 230
 231	}
 232
 233	public FileBackend getFileBackend() {
 234		return this.fileBackend;
 235	}
 236
 237	public Message attachImageToConversation(final Conversation conversation,
 238			final Uri uri, final UiCallback<Message> callback) {
 239		final Message message;
 240		if (conversation.getNextEncryption() == Message.ENCRYPTION_PGP) {
 241			message = new Message(conversation, "",
 242					Message.ENCRYPTION_DECRYPTED);
 243		} else {
 244			message = new Message(conversation, "",
 245					conversation.getNextEncryption());
 246		}
 247		message.setPresence(conversation.getNextPresence());
 248		message.setType(Message.TYPE_IMAGE);
 249		message.setStatus(Message.STATUS_OFFERED);
 250		new Thread(new Runnable() {
 251
 252			@Override
 253			public void run() {
 254				try {
 255					getFileBackend().copyImageToPrivateStorage(message, uri);
 256					if (conversation.getNextEncryption() == Message.ENCRYPTION_PGP) {
 257						getPgpEngine().encrypt(message, callback);
 258					} else {
 259						callback.success(message);
 260					}
 261				} catch (FileBackend.ImageCopyException e) {
 262					callback.error(e.getResId(), message);
 263				}
 264			}
 265		}).start();
 266		return message;
 267	}
 268
 269	public Conversation find(Bookmark bookmark) {
 270		return find(bookmark.getAccount(),bookmark.getJid());
 271	}
 272	
 273	public Conversation find(Account account, String jid) {
 274		return find(getConversations(),account,jid);
 275	}
 276
 277	public class XmppConnectionBinder extends Binder {
 278		public XmppConnectionService getService() {
 279			return XmppConnectionService.this;
 280		}
 281	}
 282
 283	@Override
 284	public int onStartCommand(Intent intent, int flags, int startId) {
 285		if ((intent != null)
 286				&& (ACTION_MERGE_PHONE_CONTACTS.equals(intent.getAction()))) {
 287			mergePhoneContactsWithRoster();
 288			return START_STICKY;
 289		} else if ((intent != null)
 290				&& (Intent.ACTION_SHUTDOWN.equals(intent.getAction()))) {
 291			logoutAndSave();
 292			return START_NOT_STICKY;
 293		}
 294		this.wakeLock.acquire();
 295		ConnectivityManager cm = (ConnectivityManager) getApplicationContext()
 296				.getSystemService(Context.CONNECTIVITY_SERVICE);
 297		NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
 298		boolean isConnected = activeNetwork != null
 299				&& activeNetwork.isConnected();
 300
 301		for (Account account : accounts) {
 302			if (!account.isOptionSet(Account.OPTION_DISABLED)) {
 303				if (!isConnected) {
 304					account.setStatus(Account.STATUS_NO_INTERNET);
 305					if (statusListener != null) {
 306						statusListener.onStatusChanged(account);
 307					}
 308				} else {
 309					if (account.getStatus() == Account.STATUS_NO_INTERNET) {
 310						account.setStatus(Account.STATUS_OFFLINE);
 311						if (statusListener != null) {
 312							statusListener.onStatusChanged(account);
 313						}
 314					}
 315					if (account.getStatus() == Account.STATUS_ONLINE) {
 316						long lastReceived = account.getXmppConnection().lastPaketReceived;
 317						long lastSent = account.getXmppConnection().lastPingSent;
 318						if (lastSent - lastReceived >= PING_TIMEOUT * 1000) {
 319							Log.d(LOGTAG, account.getJid() + ": ping timeout");
 320							this.reconnectAccount(account, true);
 321						} else if (SystemClock.elapsedRealtime() - lastReceived >= PING_MIN_INTERVAL * 1000) {
 322							account.getXmppConnection().sendPing();
 323							account.getXmppConnection().lastPingSent = SystemClock
 324									.elapsedRealtime();
 325							this.scheduleWakeupCall(2, false);
 326						}
 327					} else if (account.getStatus() == Account.STATUS_OFFLINE) {
 328						if (account.getXmppConnection() == null) {
 329							account.setXmppConnection(this
 330									.createConnection(account));
 331						}
 332						account.getXmppConnection().lastPingSent = SystemClock
 333								.elapsedRealtime();
 334						new Thread(account.getXmppConnection()).start();
 335					} else if ((account.getStatus() == Account.STATUS_CONNECTING)
 336							&& ((SystemClock.elapsedRealtime() - account
 337									.getXmppConnection().lastConnect) / 1000 >= CONNECT_TIMEOUT)) {
 338						Log.d(LOGTAG, account.getJid()
 339								+ ": time out during connect reconnecting");
 340						reconnectAccount(account, true);
 341					} else {
 342						if (account.getXmppConnection().getTimeToNextAttempt() <= 0) {
 343							reconnectAccount(account, true);
 344						}
 345					}
 346					// in any case. reschedule wakup call
 347					this.scheduleWakeupCall(PING_MAX_INTERVAL, true);
 348				}
 349				if (mOnAccountUpdate != null) {
 350					mOnAccountUpdate.onAccountUpdate();
 351				}
 352			}
 353		}
 354		if (wakeLock.isHeld()) {
 355			try {
 356				wakeLock.release();
 357			} catch (RuntimeException re) {
 358			}
 359		}
 360		return START_STICKY;
 361	}
 362
 363	@SuppressLint("TrulyRandom")
 364	@Override
 365	public void onCreate() {
 366		ExceptionHelper.init(getApplicationContext());
 367		PRNGFixes.apply();
 368		this.mRandom = new SecureRandom();
 369		this.mMemorizingTrustManager = new MemorizingTrustManager(getApplicationContext());
 370		this.mMemorizingTrustManager.wrapHostnameVerifier(
 371				new org.apache.http.conn.ssl.StrictHostnameVerifier());
 372		this.databaseBackend = DatabaseBackend
 373				.getInstance(getApplicationContext());
 374		this.fileBackend = new FileBackend(getApplicationContext());
 375		this.accounts = databaseBackend.getAccounts();
 376
 377		for (Account account : this.accounts) {
 378			this.databaseBackend.readRoster(account.getRoster());
 379		}
 380		this.mergePhoneContactsWithRoster();
 381		this.getConversations();
 382
 383		getContentResolver().registerContentObserver(
 384				ContactsContract.Contacts.CONTENT_URI, true, contactObserver);
 385		this.pgpServiceConnection = new OpenPgpServiceConnection(
 386				getApplicationContext(), "org.sufficientlysecure.keychain");
 387		this.pgpServiceConnection.bindToService();
 388
 389		this.pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
 390		this.wakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK,
 391				"XmppConnectionService");
 392	}
 393
 394	@Override
 395	public void onDestroy() {
 396		super.onDestroy();
 397		this.logoutAndSave();
 398	}
 399
 400	@Override
 401	public void onTaskRemoved(Intent rootIntent) {
 402		super.onTaskRemoved(rootIntent);
 403		this.logoutAndSave();
 404	}
 405
 406	private void logoutAndSave() {
 407		for (Account account : accounts) {
 408			databaseBackend.writeRoster(account.getRoster());
 409			if (account.getXmppConnection() != null) {
 410				disconnect(account, false);
 411			}
 412		}
 413		Context context = getApplicationContext();
 414		AlarmManager alarmManager = (AlarmManager) context
 415				.getSystemService(Context.ALARM_SERVICE);
 416		Intent intent = new Intent(context, EventReceiver.class);
 417		alarmManager.cancel(PendingIntent.getBroadcast(context, 0, intent, 0));
 418		Log.d(LOGTAG, "good bye");
 419		stopSelf();
 420	}
 421
 422	protected void scheduleWakeupCall(int seconds, boolean ping) {
 423		long timeToWake = SystemClock.elapsedRealtime() + seconds * 1000;
 424		Context context = getApplicationContext();
 425		AlarmManager alarmManager = (AlarmManager) context
 426				.getSystemService(Context.ALARM_SERVICE);
 427
 428		if (ping) {
 429			if (this.pingIntent == null) {
 430				this.pingIntent = new Intent(context, EventReceiver.class);
 431				this.pingIntent.setAction("ping");
 432				this.pingIntent.putExtra("time", timeToWake);
 433				this.pendingPingIntent = PendingIntent.getBroadcast(context, 0,
 434						this.pingIntent, 0);
 435				alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP,
 436						timeToWake, pendingPingIntent);
 437			} else {
 438				long scheduledTime = this.pingIntent.getLongExtra("time", 0);
 439				if (scheduledTime < SystemClock.elapsedRealtime()
 440						|| (scheduledTime > timeToWake)) {
 441					this.pingIntent.putExtra("time", timeToWake);
 442					alarmManager.cancel(this.pendingPingIntent);
 443					this.pendingPingIntent = PendingIntent.getBroadcast(
 444							context, 0, this.pingIntent, 0);
 445					alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP,
 446							timeToWake, pendingPingIntent);
 447				}
 448			}
 449		} else {
 450			Intent intent = new Intent(context, EventReceiver.class);
 451			intent.setAction("ping_check");
 452			PendingIntent alarmIntent = PendingIntent.getBroadcast(context, 0,
 453					intent, 0);
 454			alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP, timeToWake,
 455					alarmIntent);
 456		}
 457
 458	}
 459
 460	public XmppConnection createConnection(Account account) {
 461		SharedPreferences sharedPref = getPreferences();
 462		account.setResource(sharedPref.getString("resource", "mobile")
 463				.toLowerCase(Locale.getDefault()));
 464		XmppConnection connection = new XmppConnection(account, this);
 465		connection.setOnMessagePacketReceivedListener(this.mMessageParser);
 466		connection.setOnStatusChangedListener(this.statusListener);
 467		connection.setOnPresencePacketReceivedListener(this.mPresenceParser);
 468		connection
 469				.setOnUnregisteredIqPacketReceivedListener(this.mIqParser);
 470		connection.setOnJinglePacketReceivedListener(this.jingleListener);
 471		connection.setOnBindListener(this.mOnBindListener);
 472		return connection;
 473	}
 474
 475	synchronized public void sendMessage(Message message) {
 476		Account account = message.getConversation().getAccount();
 477		Conversation conv = message.getConversation();
 478		MessagePacket packet = null;
 479		boolean saveInDb = true;
 480		boolean send = false;
 481		if (account.getStatus() == Account.STATUS_ONLINE) {
 482			if (message.getType() == Message.TYPE_IMAGE) {
 483				if (message.getPresence() != null) {
 484					if (message.getEncryption() == Message.ENCRYPTION_OTR) {
 485						if (!conv.hasValidOtrSession()
 486								&& (message.getPresence() != null)) {
 487							conv.startOtrSession(getApplicationContext(),
 488									message.getPresence(), true);
 489							message.setStatus(Message.STATUS_WAITING);
 490						} else if (conv.hasValidOtrSession()
 491								&& conv.getOtrSession().getSessionStatus() == SessionStatus.ENCRYPTED) {
 492							mJingleConnectionManager
 493									.createNewConnection(message);
 494						} else if (message.getPresence() == null) {
 495							message.setStatus(Message.STATUS_WAITING);
 496						}
 497					} else {
 498						mJingleConnectionManager.createNewConnection(message);
 499					}
 500				} else {
 501					message.setStatus(Message.STATUS_WAITING);
 502				}
 503			} else {
 504				if (message.getEncryption() == Message.ENCRYPTION_OTR) {
 505					if (!conv.hasValidOtrSession()
 506							&& (message.getPresence() != null)) {
 507						conv.startOtrSession(getApplicationContext(),
 508								message.getPresence(), true);
 509						message.setStatus(Message.STATUS_WAITING);
 510					} else if (conv.hasValidOtrSession()
 511							&& conv.getOtrSession().getSessionStatus() == SessionStatus.ENCRYPTED) {
 512						message.setPresence(conv.getOtrSession().getSessionID()
 513								.getUserID());
 514						packet = mMessageGenerator.generateOtrChat(message);
 515						send = true;
 516						message.setStatus(Message.STATUS_SEND);
 517						
 518					} else if (message.getPresence() == null) {
 519						message.setStatus(Message.STATUS_WAITING);
 520					}
 521				} else if (message.getEncryption() == Message.ENCRYPTION_DECRYPTED) {
 522					message.getConversation().endOtrIfNeeded();
 523					message.getConversation().failWaitingOtrMessages();
 524					packet = mMessageGenerator.generatePgpChat(message);
 525					message.setStatus(Message.STATUS_SEND);
 526					send = true;
 527				} else {
 528					message.getConversation().endOtrIfNeeded();
 529					message.getConversation().failWaitingOtrMessages();
 530					if (message.getConversation().getMode() == Conversation.MODE_SINGLE) {
 531						message.setStatus(Message.STATUS_SEND);
 532					}
 533					packet = mMessageGenerator.generateChat(message);
 534					send = true;
 535				}
 536			}
 537		} else {
 538			message.setStatus(Message.STATUS_WAITING);
 539			if (message.getType() == Message.TYPE_TEXT) {
 540				if (message.getEncryption() == Message.ENCRYPTION_DECRYPTED) {
 541					String pgpBody = message.getEncryptedBody();
 542					String decryptedBody = message.getBody();
 543					message.setBody(pgpBody);
 544					databaseBackend.createMessage(message);
 545					saveInDb = false;
 546					message.setBody(decryptedBody);
 547				} else if (message.getEncryption() == Message.ENCRYPTION_OTR) {
 548					if (conv.hasValidOtrSession()) {
 549						message.setPresence(conv.getOtrSession().getSessionID()
 550								.getUserID());
 551					} else if (!conv.hasValidOtrSession()
 552							&& message.getPresence() != null) {
 553						conv.startOtrSession(getApplicationContext(),
 554								message.getPresence(), false);
 555					}
 556				}
 557			}
 558
 559		}
 560		if (saveInDb) {
 561			databaseBackend.createMessage(message);
 562		}
 563		conv.getMessages().add(message);
 564		updateConversationUi();
 565		if ((send) && (packet != null)) {
 566			sendMessagePacket(account, packet);
 567		}
 568
 569	}
 570
 571	private void sendUnsendMessages(Conversation conversation) {
 572		for (int i = 0; i < conversation.getMessages().size(); ++i) {
 573			int status = conversation.getMessages().get(i).getStatus();
 574			if (status == Message.STATUS_WAITING) {
 575				resendMessage(conversation.getMessages().get(i));
 576			}
 577		}
 578	}
 579
 580	private void resendMessage(Message message) {
 581		Account account = message.getConversation().getAccount();
 582		MessagePacket packet = null;
 583		if (message.getEncryption() == Message.ENCRYPTION_OTR) {
 584			Presences presences = message.getConversation().getContact()
 585					.getPresences();
 586			if (!message.getConversation().hasValidOtrSession()) {
 587				if ((message.getPresence() != null)
 588						&& (presences.has(message.getPresence()))) {
 589					message.getConversation().startOtrSession(
 590							getApplicationContext(), message.getPresence(),
 591							true);
 592				} else {
 593					if (presences.size() == 1) {
 594						String presence = presences.asStringArray()[0];
 595						message.getConversation().startOtrSession(
 596								getApplicationContext(), presence, true);
 597					}
 598				}
 599			} else {
 600				if (message.getConversation().getOtrSession()
 601						.getSessionStatus() == SessionStatus.ENCRYPTED) {
 602					if (message.getType() == Message.TYPE_TEXT) {
 603						packet = mMessageGenerator.generateOtrChat(message,
 604								true);
 605					} else if (message.getType() == Message.TYPE_IMAGE) {
 606						mJingleConnectionManager.createNewConnection(message);
 607					}
 608				}
 609			}
 610		} else if (message.getType() == Message.TYPE_TEXT) {
 611			if (message.getEncryption() == Message.ENCRYPTION_NONE) {
 612				packet = mMessageGenerator.generateChat(message, true);
 613			} else if ((message.getEncryption() == Message.ENCRYPTION_DECRYPTED)
 614					|| (message.getEncryption() == Message.ENCRYPTION_PGP)) {
 615				packet = mMessageGenerator.generatePgpChat(message, true);
 616			}
 617		} else if (message.getType() == Message.TYPE_IMAGE) {
 618			Presences presences = message.getConversation().getContact()
 619					.getPresences();
 620			if ((message.getPresence() != null)
 621					&& (presences.has(message.getPresence()))) {
 622				markMessage(message, Message.STATUS_OFFERED);
 623				mJingleConnectionManager.createNewConnection(message);
 624			} else {
 625				if (presences.size() == 1) {
 626					String presence = presences.asStringArray()[0];
 627					message.setPresence(presence);
 628					markMessage(message, Message.STATUS_OFFERED);
 629					mJingleConnectionManager.createNewConnection(message);
 630				}
 631			}
 632		}
 633		if (packet != null) {
 634			sendMessagePacket(account,packet);
 635			markMessage(message, Message.STATUS_SEND);
 636		}
 637	}
 638
 639	public void fetchRosterFromServer(Account account) {
 640		IqPacket iqPacket = new IqPacket(IqPacket.TYPE_GET);
 641		if (!"".equals(account.getRosterVersion())) {
 642			Log.d(LOGTAG, account.getJid() + ": fetching roster version "
 643					+ account.getRosterVersion());
 644		} else {
 645			Log.d(LOGTAG, account.getJid() + ": fetching roster");
 646		}
 647		iqPacket.query("jabber:iq:roster").setAttribute("ver",
 648				account.getRosterVersion());
 649		account.getXmppConnection().sendIqPacket(iqPacket,
 650				new OnIqPacketReceived() {
 651
 652					@Override
 653					public void onIqPacketReceived(final Account account,
 654							IqPacket packet) {
 655						Element query = packet.findChild("query");
 656						if (query != null) {
 657							account.getRoster().markAllAsNotInRoster();
 658							mIqParser.rosterItems(account, query);
 659						}
 660					}
 661				});
 662	}
 663	
 664	public void fetchBookmarks(Account account) {
 665		IqPacket iqPacket = new IqPacket(IqPacket.TYPE_GET);
 666		Element query = iqPacket.query("jabber:iq:private");
 667		query.addChild("storage", "storage:bookmarks");
 668		OnIqPacketReceived callback = new OnIqPacketReceived() {
 669			
 670			@Override
 671			public void onIqPacketReceived(Account account, IqPacket packet) {
 672				Element query = packet.query();
 673				List<Bookmark> bookmarks = new ArrayList<Bookmark>();
 674				Element storage = query.findChild("storage", "storage:bookmarks");
 675				if (storage!=null) {
 676					for(Element item : storage.getChildren()) {
 677						if (item.getName().equals("conference")) {
 678							Bookmark bookmark = Bookmark.parse(item,account);
 679							bookmarks.add(bookmark);
 680							Conversation conversation = find(bookmark);
 681							if (conversation!=null) {
 682								conversation.setBookmark(bookmark);
 683							} else {
 684								if (bookmark.autojoin()) {
 685									conversation = findOrCreateConversation(account, bookmark.getJid(), true);
 686									conversation.setBookmark(bookmark);
 687									joinMuc(conversation);
 688								}
 689							}
 690						}
 691					}
 692				}
 693				account.setBookmarks(bookmarks);
 694			}
 695		};
 696		sendIqPacket(account, iqPacket, callback);
 697		
 698	}
 699	
 700	public void pushBookmarks(Account account) {
 701		IqPacket iqPacket = new IqPacket(IqPacket.TYPE_SET);
 702		Element query = iqPacket.query("jabber:iq:private");
 703		Element storage = query.addChild("storage", "storage:bookmarks");
 704		for(Bookmark bookmark : account.getBookmarks()) {
 705			storage.addChild(bookmark.toElement());
 706		}
 707		sendIqPacket(account, iqPacket,null);
 708	}
 709
 710	private void mergePhoneContactsWithRoster() {
 711		PhoneHelper.loadPhoneContacts(getApplicationContext(),
 712				new OnPhoneContactsLoadedListener() {
 713					@Override
 714					public void onPhoneContactsLoaded(List<Bundle> phoneContacts) {
 715						for (Account account : accounts) {
 716							account.getRoster().clearSystemAccounts();
 717						}
 718						for (Bundle phoneContact : phoneContacts) {
 719							for (Account account : accounts) {
 720								String jid = phoneContact.getString("jid");
 721								Contact contact = account.getRoster()
 722										.getContact(jid);
 723								String systemAccount = phoneContact
 724										.getInt("phoneid")
 725										+ "#"
 726										+ phoneContact.getString("lookup");
 727								contact.setSystemAccount(systemAccount);
 728								contact.setPhotoUri(phoneContact
 729										.getString("photouri"));
 730								contact.setSystemName(phoneContact
 731										.getString("displayname"));
 732							}
 733						}
 734					}
 735				});
 736	}
 737
 738	public List<Conversation> getConversations() {
 739		if (this.conversations == null) {
 740			Hashtable<String, Account> accountLookupTable = new Hashtable<String, Account>();
 741			for (Account account : this.accounts) {
 742				accountLookupTable.put(account.getUuid(), account);
 743			}
 744			this.conversations = databaseBackend
 745					.getConversations(Conversation.STATUS_AVAILABLE);
 746			for (Conversation conv : this.conversations) {
 747				Account account = accountLookupTable.get(conv.getAccountUuid());
 748				conv.setAccount(account);
 749				conv.setMessages(databaseBackend.getMessages(conv, 50));
 750			}
 751		}
 752		
 753		return this.conversations;
 754	}
 755	
 756	public void populateWithOrderedConversations(List<Conversation> list) {
 757		list.clear();
 758		list.addAll(getConversations());
 759		Collections.sort(list, new Comparator<Conversation>() {
 760			@Override
 761			public int compare(Conversation lhs, Conversation rhs) {
 762				Message left = lhs.getLatestMessage();
 763				Message right = rhs.getLatestMessage();
 764				if (left.getTimeSent() > right.getTimeSent()) {
 765					return -1;
 766				} else if (left.getTimeSent() < right.getTimeSent()) {
 767					return 1;
 768				} else {
 769					return 0;
 770				}
 771			}
 772		});
 773	}
 774
 775	public List<Message> getMoreMessages(Conversation conversation,
 776			long timestamp) {
 777		List<Message> messages = databaseBackend.getMessages(conversation, 50,
 778				timestamp);
 779		for (Message message : messages) {
 780			message.setConversation(conversation);
 781		}
 782		return messages;
 783	}
 784
 785	public List<Account> getAccounts() {
 786		return this.accounts;
 787	}
 788
 789	public Conversation find(List<Conversation> haystack, Contact contact) {
 790		for (Conversation conversation : haystack) {
 791			if (conversation.getContact() == contact) {
 792				return conversation;
 793			}
 794		}
 795		return null;
 796	}
 797
 798	public Conversation find(List<Conversation> haystack, Account account, String jid) {
 799		for (Conversation conversation : haystack) {
 800			if ((conversation.getAccount().equals(account))
 801					&& (conversation.getContactJid().split("/")[0].equals(jid))) {
 802				return conversation;
 803			}
 804		}
 805		return null;
 806	}
 807	
 808	
 809	public Conversation findOrCreateConversation(Account account, String jid,
 810			boolean muc) {
 811		Conversation conversation = find(account, jid);
 812		if (conversation != null) {
 813			return conversation;
 814		}
 815		conversation = databaseBackend.findConversation(account,jid);
 816		if (conversation != null) {
 817			conversation.setStatus(Conversation.STATUS_AVAILABLE);
 818			conversation.setAccount(account);
 819			if (muc) {
 820				conversation.setMode(Conversation.MODE_MULTI);
 821			} else {
 822				conversation.setMode(Conversation.MODE_SINGLE);
 823			}
 824			conversation.setMessages(databaseBackend.getMessages(conversation,
 825					50));
 826			this.databaseBackend.updateConversation(conversation);
 827		} else {
 828			String conversationName;
 829			Contact contact = account.getRoster().getContact(jid);
 830			if (contact != null) {
 831				conversationName = contact.getDisplayName();
 832			} else {
 833				conversationName = jid.split("@")[0];
 834			}
 835			if (muc) {
 836				conversation = new Conversation(conversationName, account, jid,
 837						Conversation.MODE_MULTI);
 838			} else {
 839				conversation = new Conversation(conversationName, account, jid,
 840						Conversation.MODE_SINGLE);
 841			}
 842			this.databaseBackend.createConversation(conversation);
 843		}
 844		this.conversations.add(conversation);
 845		updateConversationUi();
 846		return conversation;
 847	}
 848
 849	public void archiveConversation(Conversation conversation) {
 850		if (conversation.getMode() == Conversation.MODE_MULTI) {
 851			Bookmark bookmark = conversation.getBookmark();
 852			if (bookmark!=null && bookmark.autojoin()) {
 853				bookmark.setAutojoin(false);
 854				pushBookmarks(bookmark.getAccount());
 855			}
 856			leaveMuc(conversation);
 857		} else {
 858			conversation.endOtrIfNeeded();
 859		}
 860		this.databaseBackend.updateConversation(conversation);
 861		this.conversations.remove(conversation);
 862		updateConversationUi();
 863	}
 864
 865	public void clearConversationHistory(Conversation conversation) {
 866		this.databaseBackend.deleteMessagesInConversation(conversation);
 867		this.fileBackend.removeFiles(conversation);
 868		conversation.getMessages().clear();
 869		updateConversationUi();
 870	}
 871
 872	public int getConversationCount() {
 873		return this.databaseBackend.getConversationCount();
 874	}
 875
 876	public void createAccount(Account account) {
 877		databaseBackend.createAccount(account);
 878		this.accounts.add(account);
 879		this.reconnectAccount(account, false);
 880		updateAccountUi();
 881	}
 882
 883	public void updateAccount(Account account) {
 884		this.statusListener.onStatusChanged(account);
 885		databaseBackend.updateAccount(account);
 886		reconnectAccount(account, false);
 887		updateAccountUi();
 888		UIHelper.showErrorNotification(getApplicationContext(), getAccounts());
 889	}
 890
 891	public void deleteAccount(Account account) {
 892		for(Conversation conversation : conversations) {
 893			if (conversation.getAccount() == account) {
 894				if (conversation.getMode() == Conversation.MODE_MULTI) {
 895					leaveMuc(conversation);
 896				} else if (conversation.getMode() == Conversation.MODE_SINGLE) {
 897					conversation.endOtrIfNeeded();
 898				}
 899				conversations.remove(conversation);
 900			}
 901		}
 902		if (account.getXmppConnection() != null) {
 903			this.disconnect(account, true);
 904		}
 905		databaseBackend.deleteAccount(account);
 906		this.accounts.remove(account);
 907		updateAccountUi();
 908		UIHelper.showErrorNotification(getApplicationContext(), getAccounts());
 909	}
 910
 911	public void setOnConversationListChangedListener(
 912			OnConversationUpdate listener) {
 913		this.mOnConversationUpdate = listener;
 914		this.convChangedListenerCount++;
 915	}
 916
 917	public void removeOnConversationListChangedListener() {
 918		this.convChangedListenerCount--;
 919		if (this.convChangedListenerCount == 0) {
 920			this.mOnConversationUpdate = null;
 921		}
 922	}
 923
 924	public void setOnAccountListChangedListener(OnAccountUpdate listener) {
 925		this.mOnAccountUpdate = listener;
 926	}
 927
 928	public void removeOnAccountListChangedListener() {
 929		this.mOnAccountUpdate = null;
 930	}
 931	
 932	public void setOnRosterUpdateListener(OnRosterUpdate listener) {
 933		this.mOnRosterUpdate = listener;
 934	}
 935
 936	public void removeOnRosterUpdateListener() {
 937		this.mOnRosterUpdate = null;
 938	}
 939
 940	public void connectMultiModeConversations(Account account) {
 941		List<Conversation> conversations = getConversations();
 942		for (int i = 0; i < conversations.size(); i++) {
 943			Conversation conversation = conversations.get(i);
 944			if ((conversation.getMode() == Conversation.MODE_MULTI)
 945					&& (conversation.getAccount() == account)) {
 946				joinMuc(conversation);
 947			}
 948		}
 949	}
 950
 951	public void joinMuc(Conversation conversation) {
 952		Account account = conversation.getAccount();
 953		account.pendingConferenceJoins.remove(conversation);
 954		account.pendingConferenceLeaves.remove(conversation);
 955		if (account.getStatus() == Account.STATUS_ONLINE) {
 956			Log.d(LOGTAG,"joining conversation "+conversation.getContactJid());
 957			String nick = conversation.getMucOptions().getProposedNick();
 958			conversation.getMucOptions().setJoinNick(nick);
 959			PresencePacket packet = new PresencePacket();
 960			String joinJid = conversation.getMucOptions().getJoinJid();
 961			packet.setAttribute("to",conversation.getMucOptions().getJoinJid());
 962			Element x = new Element("x");
 963			x.setAttribute("xmlns", "http://jabber.org/protocol/muc");
 964			String sig = account.getPgpSignature();
 965			if (sig != null) {
 966				packet.addChild("status").setContent("online");
 967				packet.addChild("x", "jabber:x:signed").setContent(sig);
 968			}
 969			if (conversation.getMessages().size() != 0) {
 970				final SimpleDateFormat mDateFormat = new SimpleDateFormat(
 971						"yyyy-MM-dd'T'HH:mm:ss.SSS'Z'", Locale.US);
 972				mDateFormat.setTimeZone(TimeZone.getTimeZone("UTC"));
 973				Date date = new Date(
 974						conversation.getLatestMessage().getTimeSent() + 1000);
 975				x.addChild("history").setAttribute("since",
 976						mDateFormat.format(date));
 977			}
 978			packet.addChild(x);
 979			sendPresencePacket(account, packet);
 980			if (!joinJid.equals(conversation.getContactJid())) {
 981				conversation.setContactJid(joinJid);
 982				databaseBackend.updateConversation(conversation);
 983			}
 984		} else {
 985			account.pendingConferenceJoins.add(conversation);
 986		}
 987	}
 988
 989	private OnRenameListener renameListener = null;
 990
 991	public void setOnRenameListener(OnRenameListener listener) {
 992		this.renameListener = listener;
 993	}
 994
 995	public void renameInMuc(final Conversation conversation, final String nick) {
 996		final MucOptions options = conversation.getMucOptions();
 997		options.setJoinNick(nick);
 998		if (options.online()) {
 999			Account account = conversation.getAccount();
1000			options.setOnRenameListener(new OnRenameListener() {
1001
1002				@Override
1003				public void onRename(boolean success) {
1004					if (renameListener != null) {
1005						renameListener.onRename(success);
1006					}
1007					if (success) {
1008						conversation.setContactJid(conversation.getMucOptions().getJoinJid());
1009						databaseBackend.updateConversation(conversation);
1010						Bookmark bookmark = conversation.getBookmark();
1011						if (bookmark!=null) {
1012							bookmark.setNick(nick);
1013							pushBookmarks(bookmark.getAccount());
1014						}
1015					}
1016				}
1017			});
1018			options.flagAboutToRename();
1019			PresencePacket packet = new PresencePacket();
1020			packet.setAttribute("to",options.getJoinJid());
1021			packet.setAttribute("from", conversation.getAccount().getFullJid());
1022
1023			String sig = account.getPgpSignature();
1024			if (sig != null) {
1025				packet.addChild("status").setContent("online");
1026				packet.addChild("x", "jabber:x:signed").setContent(sig);
1027			}
1028			sendPresencePacket(account,packet);
1029		} else {
1030			conversation.setContactJid(options.getJoinJid());
1031			databaseBackend.updateConversation(conversation);
1032			if (conversation.getAccount().getStatus() == Account.STATUS_ONLINE) {
1033				Bookmark bookmark = conversation.getBookmark();
1034				if (bookmark!=null) {
1035					bookmark.setNick(nick);
1036					pushBookmarks(bookmark.getAccount());
1037				}
1038				joinMuc(conversation);
1039			}
1040		}
1041	}
1042
1043	public void leaveMuc(Conversation conversation) {
1044		Account account = conversation.getAccount();
1045		account.pendingConferenceJoins.remove(conversation);
1046		account.pendingConferenceLeaves.remove(conversation);
1047		if (account.getStatus() == Account.STATUS_ONLINE) {
1048			PresencePacket packet = new PresencePacket();
1049			packet.setAttribute("to", conversation.getMucOptions().getJoinJid());
1050			packet.setAttribute("from", conversation.getAccount().getFullJid());
1051			packet.setAttribute("type", "unavailable");
1052			sendPresencePacket(conversation.getAccount(),packet);
1053			conversation.getMucOptions().setOffline();
1054			conversation.deregisterWithBookmark();
1055			Log.d(LOGTAG,conversation.getAccount().getJid()+" leaving muc "+conversation.getContactJid());
1056		} else {
1057			account.pendingConferenceLeaves.add(conversation);
1058		}
1059	}
1060
1061	public void disconnect(Account account, boolean force) {
1062		if ((account.getStatus() == Account.STATUS_ONLINE)
1063				|| (account.getStatus() == Account.STATUS_DISABLED)) {
1064			if (!force) {
1065				List<Conversation> conversations = getConversations();
1066				for (int i = 0; i < conversations.size(); i++) {
1067					Conversation conversation = conversations.get(i);
1068					if (conversation.getAccount() == account) {
1069						if (conversation.getMode() == Conversation.MODE_MULTI) {
1070							leaveMuc(conversation);
1071						} else {
1072							conversation.endOtrIfNeeded();
1073						}
1074					}
1075				}
1076			}
1077			account.getXmppConnection().disconnect(force);
1078		}
1079	}
1080
1081	@Override
1082	public IBinder onBind(Intent intent) {
1083		return mBinder;
1084	}
1085
1086	public void updateMessage(Message message) {
1087		databaseBackend.updateMessage(message);
1088	}
1089
1090	protected void syncDirtyContacts(Account account) {
1091		for (Contact contact : account.getRoster().getContacts()) {
1092			if (contact.getOption(Contact.Options.DIRTY_PUSH)) {
1093				pushContactToServer(contact);
1094			}
1095			if (contact.getOption(Contact.Options.DIRTY_DELETE)) {
1096				Log.d(LOGTAG, "dirty delete");
1097				deleteContactOnServer(contact);
1098			}
1099		}
1100	}
1101
1102	public void createContact(Contact contact) {
1103		SharedPreferences sharedPref = getPreferences();
1104		boolean autoGrant = sharedPref.getBoolean("grant_new_contacts", true);
1105		if (autoGrant) {
1106			contact.setOption(Contact.Options.PREEMPTIVE_GRANT);
1107			contact.setOption(Contact.Options.ASKING);
1108		}
1109		pushContactToServer(contact);
1110	}
1111
1112	public void onOtrSessionEstablished(Conversation conversation) {
1113		Account account = conversation.getAccount();
1114		List<Message> messages = conversation.getMessages();
1115		Session otrSession = conversation.getOtrSession();
1116		Log.d(LOGTAG, account.getJid() + " otr session established with "
1117				+ conversation.getContactJid() + "/"
1118				+ otrSession.getSessionID().getUserID());
1119		for (int i = 0; i < messages.size(); ++i) {
1120			Message msg = messages.get(i);
1121			if ((msg.getStatus() == Message.STATUS_UNSEND || msg.getStatus() == Message.STATUS_WAITING)
1122					&& (msg.getEncryption() == Message.ENCRYPTION_OTR)) {
1123				msg.setPresence(otrSession.getSessionID().getUserID());
1124				if (msg.getType() == Message.TYPE_TEXT) {
1125					MessagePacket outPacket = mMessageGenerator
1126							.generateOtrChat(msg, true);
1127					if (outPacket != null) {
1128						msg.setStatus(Message.STATUS_SEND);
1129						databaseBackend.updateMessage(msg);
1130						sendMessagePacket(account,outPacket);
1131					}
1132				} else if (msg.getType() == Message.TYPE_IMAGE) {
1133					mJingleConnectionManager.createNewConnection(msg);
1134				}
1135			}
1136		}
1137		notifyUi(conversation, false);
1138	}
1139
1140	public boolean renewSymmetricKey(Conversation conversation) {
1141		Account account = conversation.getAccount();
1142		byte[] symmetricKey = new byte[32];
1143		this.mRandom.nextBytes(symmetricKey);
1144		Session otrSession = conversation.getOtrSession();
1145		if (otrSession != null) {
1146			MessagePacket packet = new MessagePacket();
1147			packet.setType(MessagePacket.TYPE_CHAT);
1148			packet.setFrom(account.getFullJid());
1149			packet.addChild("private", "urn:xmpp:carbons:2");
1150			packet.addChild("no-copy", "urn:xmpp:hints");
1151			packet.setTo(otrSession.getSessionID().getAccountID() + "/"
1152					+ otrSession.getSessionID().getUserID());
1153			try {
1154				packet.setBody(otrSession
1155						.transformSending(CryptoHelper.FILETRANSFER
1156								+ CryptoHelper.bytesToHex(symmetricKey)));
1157				sendMessagePacket(account,packet);
1158				conversation.setSymmetricKey(symmetricKey);
1159				return true;
1160			} catch (OtrException e) {
1161				return false;
1162			}
1163		}
1164		return false;
1165	}
1166
1167	public void pushContactToServer(Contact contact) {
1168		contact.resetOption(Contact.Options.DIRTY_DELETE);
1169		contact.setOption(Contact.Options.DIRTY_PUSH);
1170		Account account = contact.getAccount();
1171		if (account.getStatus() == Account.STATUS_ONLINE) {
1172			boolean ask = contact.getOption(Contact.Options.ASKING);
1173			boolean sendUpdates = contact.getOption(Contact.Options.PENDING_SUBSCRIPTION_REQUEST)
1174					&& contact.getOption(Contact.Options.PREEMPTIVE_GRANT);
1175			IqPacket iq = new IqPacket(IqPacket.TYPE_SET);
1176			iq.query("jabber:iq:roster").addChild(contact.asElement());
1177			account.getXmppConnection().sendIqPacket(iq, null);
1178			if (sendUpdates) {
1179				sendPresencePacket(account, mPresenceGenerator.sendPresenceUpdatesTo(contact));
1180			}
1181			if (ask) {
1182				sendPresencePacket(account, mPresenceGenerator.requestPresenceUpdatesFrom(contact));
1183			}
1184		}
1185	}
1186
1187	public void deleteContactOnServer(Contact contact) {
1188		contact.resetOption(Contact.Options.PREEMPTIVE_GRANT);
1189		contact.resetOption(Contact.Options.DIRTY_PUSH);
1190		contact.setOption(Contact.Options.DIRTY_DELETE);
1191		Account account = contact.getAccount();
1192		if (account.getStatus() == Account.STATUS_ONLINE) {
1193			IqPacket iq = new IqPacket(IqPacket.TYPE_SET);
1194			Element item = iq.query("jabber:iq:roster").addChild("item");
1195			item.setAttribute("jid", contact.getJid());
1196			item.setAttribute("subscription", "remove");
1197			account.getXmppConnection().sendIqPacket(iq, null);
1198		}
1199	}
1200
1201	public void updateConversation(Conversation conversation) {
1202		this.databaseBackend.updateConversation(conversation);
1203	}
1204
1205	public void reconnectAccount(final Account account, final boolean force) {
1206		new Thread(new Runnable() {
1207
1208			@Override
1209			public void run() {
1210				if (account.getXmppConnection() != null) {
1211					disconnect(account, force);
1212				}
1213				if (!account.isOptionSet(Account.OPTION_DISABLED)) {
1214					if (account.getXmppConnection() == null) {
1215						account.setXmppConnection(createConnection(account));
1216					}
1217					Thread thread = new Thread(account.getXmppConnection());
1218					thread.start();
1219					scheduleWakeupCall((int) (CONNECT_TIMEOUT * 1.2), false);
1220				}
1221			}
1222		}).start();
1223	}
1224
1225	public void invite(Conversation conversation, String contact) {
1226		MessagePacket packet = mMessageGenerator.invite(conversation, contact);
1227		sendMessagePacket(conversation.getAccount(),packet);
1228	}
1229
1230	public boolean markMessage(Account account, String recipient, String uuid,
1231			int status) {
1232		for (Conversation conversation : getConversations()) {
1233			if (conversation.getContactJid().equals(recipient)
1234					&& conversation.getAccount().equals(account)) {
1235				return markMessage(conversation, uuid, status);
1236			}
1237		}
1238		return false;
1239	}
1240
1241	public boolean markMessage(Conversation conversation, String uuid,
1242			int status) {
1243		for (Message message : conversation.getMessages()) {
1244			if (message.getUuid().equals(uuid)) {
1245				markMessage(message, status);
1246				return true;
1247			}
1248		}
1249		return false;
1250	}
1251
1252	public void markMessage(Message message, int status) {
1253		message.setStatus(status);
1254		databaseBackend.updateMessage(message);
1255		updateConversationUi();
1256	}
1257
1258	public SharedPreferences getPreferences() {
1259		return PreferenceManager
1260				.getDefaultSharedPreferences(getApplicationContext());
1261	}
1262
1263	public boolean confirmMessages() {
1264		return getPreferences().getBoolean("confirm_messages", true);
1265	}
1266
1267	public void notifyUi(Conversation conversation, boolean notify) {
1268		if (mOnConversationUpdate != null) {
1269			mOnConversationUpdate.onConversationUpdate();
1270		} else {
1271			UIHelper.updateNotification(getApplicationContext(),
1272					getConversations(), conversation, notify);
1273		}
1274	}
1275	
1276	public void updateConversationUi() {
1277		if (mOnConversationUpdate != null) {
1278			mOnConversationUpdate.onConversationUpdate();
1279		}
1280	}
1281	
1282	public void updateAccountUi() {
1283		if (mOnAccountUpdate != null) {
1284			mOnAccountUpdate.onAccountUpdate();
1285		}
1286	}
1287	
1288	public void updateRosterUi() {
1289		if (mOnRosterUpdate != null) {
1290			mOnRosterUpdate.onRosterUpdate();
1291		}
1292	}
1293
1294	public Account findAccountByJid(String accountJid) {
1295		for (Account account : this.accounts) {
1296			if (account.getJid().equals(accountJid)) {
1297				return account;
1298			}
1299		}
1300		return null;
1301	}
1302	
1303	public Conversation findConversationByUuid(String uuid) {
1304		for (Conversation conversation : getConversations()) {
1305			if (conversation.getUuid().equals(uuid)) {
1306				return conversation;
1307			}
1308		}
1309		return null;
1310	}
1311
1312	public void markRead(Conversation conversation) {
1313		conversation.markRead();
1314		String id = conversation.popLatestMarkableMessageId();
1315		if (confirmMessages() && id != null) {
1316			Account account = conversation.getAccount();
1317			String to = conversation.getContactJid();
1318			this.sendMessagePacket(conversation.getAccount(), mMessageGenerator.confirm(account, to, id));
1319		}
1320	}
1321
1322	public SecureRandom getRNG() {
1323		return this.mRandom;
1324	}
1325	
1326	public MemorizingTrustManager getMemorizingTrustManager() {
1327		return this.mMemorizingTrustManager;
1328	}
1329
1330	public PowerManager getPowerManager() {
1331		return this.pm;
1332	}
1333
1334	public void replyWithNotAcceptable(Account account, MessagePacket packet) {
1335		if (account.getStatus() == Account.STATUS_ONLINE) {
1336			MessagePacket error = this.mMessageGenerator
1337					.generateNotAcceptable(packet);
1338			sendMessagePacket(account,error);
1339		}
1340	}
1341
1342	public void syncRosterToDisk(final Account account) {
1343		new Thread(new Runnable() {
1344
1345			@Override
1346			public void run() {
1347				databaseBackend.writeRoster(account.getRoster());
1348			}
1349		}).start();
1350
1351	}
1352
1353	public List<String> getKnownHosts() {
1354		List<String> hosts = new ArrayList<String>();
1355		for (Account account : getAccounts()) {
1356			if (!hosts.contains(account.getServer())) {
1357				hosts.add(account.getServer());
1358			}
1359			for (Contact contact : account.getRoster().getContacts()) {
1360				if (contact.showInRoster()) {
1361					String server = contact.getServer();
1362					if (server != null && !hosts.contains(server)) {
1363						hosts.add(server);
1364					}
1365				}
1366			}
1367		}
1368		return hosts;
1369	}
1370
1371	public List<String> getKnownConferenceHosts() {
1372		ArrayList<String> mucServers = new ArrayList<String>();
1373		for (Account account : accounts) {
1374			if (account.getXmppConnection() != null) {
1375				String server = account.getXmppConnection().getMucServer();
1376				if (server != null) {
1377					mucServers.add(server);
1378				}
1379			}
1380		}
1381		return mucServers;
1382	}
1383	
1384	public void sendMessagePacket(Account account, MessagePacket packet) {
1385		account.getXmppConnection().sendMessagePacket(packet);
1386	}
1387	
1388	public void sendPresencePacket(Account account, PresencePacket packet) {
1389		account.getXmppConnection().sendPresencePacket(packet);
1390	}
1391	
1392	public void sendIqPacket(Account account, IqPacket packet, OnIqPacketReceived callback) {
1393		account.getXmppConnection().sendIqPacket(packet, callback);
1394	}
1395	
1396	public MessageGenerator getMessageGenerator() {
1397		return this.mMessageGenerator;
1398	}
1399	
1400	public PresenceGenerator getPresenceGenerator() {
1401		return this.mPresenceGenerator;
1402	}
1403	
1404	public JingleConnectionManager getJingleConnectionManager() {
1405		return this.mJingleConnectionManager;
1406	}
1407	
1408	public interface OnConversationUpdate {
1409		public void onConversationUpdate();
1410	}
1411	
1412	public interface OnAccountUpdate {
1413		public void onAccountUpdate();
1414	}
1415	
1416	public interface OnRosterUpdate {
1417		public void onRosterUpdate();
1418	}
1419}