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.IqGenerator;
  33import eu.siacs.conversations.generator.MessageGenerator;
  34import eu.siacs.conversations.generator.PresenceGenerator;
  35import eu.siacs.conversations.parser.IqParser;
  36import eu.siacs.conversations.parser.MessageParser;
  37import eu.siacs.conversations.parser.PresenceParser;
  38import eu.siacs.conversations.persistance.DatabaseBackend;
  39import eu.siacs.conversations.persistance.FileBackend;
  40import eu.siacs.conversations.ui.UiCallback;
  41import eu.siacs.conversations.utils.CryptoHelper;
  42import eu.siacs.conversations.utils.ExceptionHelper;
  43import eu.siacs.conversations.utils.OnPhoneContactsLoadedListener;
  44import eu.siacs.conversations.utils.PRNGFixes;
  45import eu.siacs.conversations.utils.PhoneHelper;
  46import eu.siacs.conversations.utils.UIHelper;
  47import eu.siacs.conversations.xml.Element;
  48import eu.siacs.conversations.xmpp.OnBindListener;
  49import eu.siacs.conversations.xmpp.OnContactStatusChanged;
  50import eu.siacs.conversations.xmpp.OnIqPacketReceived;
  51import eu.siacs.conversations.xmpp.OnStatusChanged;
  52import eu.siacs.conversations.xmpp.OnTLSExceptionReceived;
  53import eu.siacs.conversations.xmpp.XmppConnection;
  54import eu.siacs.conversations.xmpp.jingle.JingleConnectionManager;
  55import eu.siacs.conversations.xmpp.jingle.OnJinglePacketReceived;
  56import eu.siacs.conversations.xmpp.jingle.stanzas.JinglePacket;
  57import eu.siacs.conversations.xmpp.stanzas.IqPacket;
  58import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
  59import eu.siacs.conversations.xmpp.stanzas.PresencePacket;
  60import android.annotation.SuppressLint;
  61import android.app.AlarmManager;
  62import android.app.PendingIntent;
  63import android.app.Service;
  64import android.content.Context;
  65import android.content.Intent;
  66import android.content.SharedPreferences;
  67import android.database.ContentObserver;
  68import android.net.ConnectivityManager;
  69import android.net.NetworkInfo;
  70import android.net.Uri;
  71import android.os.Binder;
  72import android.os.Bundle;
  73import android.os.IBinder;
  74import android.os.PowerManager;
  75import android.os.PowerManager.WakeLock;
  76import android.os.SystemClock;
  77import android.preference.PreferenceManager;
  78import android.provider.ContactsContract;
  79import android.util.Log;
  80
  81public class XmppConnectionService extends Service {
  82
  83	protected static final String LOGTAG = "xmppService";
  84	public DatabaseBackend databaseBackend;
  85	private FileBackend fileBackend;
  86
  87	public long startDate;
  88
  89	private static final int PING_MAX_INTERVAL = 300;
  90	private static final int PING_MIN_INTERVAL = 30;
  91	private static final int PING_TIMEOUT = 10;
  92	private static final int CONNECT_TIMEOUT = 90;
  93	public static final long CARBON_GRACE_PERIOD = 60000L;
  94
  95	private static String ACTION_MERGE_PHONE_CONTACTS = "merge_phone_contacts";
  96	
  97	private MemorizingTrustManager mMemorizingTrustManager;
  98
  99	private MessageParser mMessageParser = new MessageParser(this);
 100	private PresenceParser mPresenceParser = new PresenceParser(this);
 101	private IqParser mIqParser = new IqParser(this);
 102	private MessageGenerator mMessageGenerator = new MessageGenerator();
 103	private PresenceGenerator mPresenceGenerator = new PresenceGenerator();
 104	
 105	private List<Account> accounts;
 106	private CopyOnWriteArrayList<Conversation> conversations = null;
 107	private JingleConnectionManager mJingleConnectionManager = new JingleConnectionManager(
 108			this);
 109
 110	private OnConversationUpdate mOnConversationUpdate = null;
 111	private int convChangedListenerCount = 0;
 112	private OnAccountUpdate mOnAccountUpdate = null;
 113	private OnRosterUpdate mOnRosterUpdate = null;
 114	public OnContactStatusChanged onContactStatusChanged = new OnContactStatusChanged() {
 115
 116		@Override
 117		public void onContactStatusChanged(Contact contact, boolean online) {
 118			Conversation conversation = find(getConversations(),contact);
 119			if (conversation != null) {
 120				conversation.endOtrIfNeeded();
 121				if (online && (contact.getPresences().size() == 1)) {
 122					sendUnsendMessages(conversation);
 123				}
 124			}
 125		}
 126	};
 127
 128	private SecureRandom mRandom;
 129
 130	private ContentObserver contactObserver = new ContentObserver(null) {
 131		@Override
 132		public void onChange(boolean selfChange) {
 133			super.onChange(selfChange);
 134			Intent intent = new Intent(getApplicationContext(),
 135					XmppConnectionService.class);
 136			intent.setAction(ACTION_MERGE_PHONE_CONTACTS);
 137			startService(intent);
 138		}
 139	};
 140
 141	private final IBinder mBinder = new XmppConnectionBinder();
 142	private OnStatusChanged statusListener = new OnStatusChanged() {
 143
 144		@Override
 145		public void onStatusChanged(Account account) {
 146			if (mOnAccountUpdate != null) {
 147				mOnAccountUpdate.onAccountUpdate();;
 148			}
 149			if (account.getStatus() == Account.STATUS_ONLINE) {
 150				for(Conversation conversation : account.pendingConferenceLeaves) {
 151					leaveMuc(conversation);
 152				}
 153				for(Conversation conversation : account.pendingConferenceJoins) {
 154					joinMuc(conversation);
 155				}
 156				mJingleConnectionManager.cancelInTransmission();
 157				List<Conversation> conversations = getConversations();
 158				for (int i = 0; i < conversations.size(); ++i) {
 159					if (conversations.get(i).getAccount() == account) {
 160						conversations.get(i).startOtrIfNeeded();
 161						sendUnsendMessages(conversations.get(i));
 162					}
 163				}
 164				syncDirtyContacts(account);
 165				scheduleWakeupCall(PING_MAX_INTERVAL, true);
 166			} else if (account.getStatus() == Account.STATUS_OFFLINE) {
 167				if (!account.isOptionSet(Account.OPTION_DISABLED)) {
 168					int timeToReconnect = mRandom.nextInt(50) + 10;
 169					scheduleWakeupCall(timeToReconnect, false);
 170				}
 171
 172			} else if (account.getStatus() == Account.STATUS_REGISTRATION_SUCCESSFULL) {
 173				databaseBackend.updateAccount(account);
 174				reconnectAccount(account, true);
 175			} else if ((account.getStatus() != Account.STATUS_CONNECTING)
 176					&& (account.getStatus() != Account.STATUS_NO_INTERNET)) {
 177				int next = account.getXmppConnection().getTimeToNextAttempt();
 178				Log.d(LOGTAG, account.getJid()
 179						+ ": error connecting account. try again in " + next
 180						+ "s for the "
 181						+ (account.getXmppConnection().getAttempt() + 1)
 182						+ " time");
 183				scheduleWakeupCall(next, false);
 184			}
 185			UIHelper.showErrorNotification(getApplicationContext(),
 186					getAccounts());
 187		}
 188	};
 189
 190	private OnJinglePacketReceived jingleListener = new OnJinglePacketReceived() {
 191
 192		@Override
 193		public void onJinglePacketReceived(Account account, JinglePacket packet) {
 194			mJingleConnectionManager.deliverPacket(account, packet);
 195		}
 196	};
 197
 198	private OpenPgpServiceConnection pgpServiceConnection;
 199	private PgpEngine mPgpEngine = null;
 200	private Intent pingIntent;
 201	private PendingIntent pendingPingIntent = null;
 202	private WakeLock wakeLock;
 203	private PowerManager pm;
 204	private OnBindListener mOnBindListener = new OnBindListener() {
 205
 206			@Override
 207			public void onBind(final Account account) {
 208				account.getRoster().clearPresences();
 209				account.clearPresences(); // self presences
 210				account.pendingConferenceJoins.clear();
 211				account.pendingConferenceLeaves.clear();
 212				fetchRosterFromServer(account);
 213				fetchBookmarks(account);
 214				sendPresencePacket(account, mPresenceGenerator.sendPresence(account));
 215				connectMultiModeConversations(account);
 216				updateConversationUi();
 217			}
 218		};
 219
 220	public PgpEngine getPgpEngine() {
 221		if (pgpServiceConnection.isBound()) {
 222			if (this.mPgpEngine == null) {
 223				this.mPgpEngine = new PgpEngine(new OpenPgpApi(
 224						getApplicationContext(),
 225						pgpServiceConnection.getService()), this);
 226			}
 227			return mPgpEngine;
 228		} else {
 229			return null;
 230		}
 231
 232	}
 233
 234	public FileBackend getFileBackend() {
 235		return this.fileBackend;
 236	}
 237
 238	public Message attachImageToConversation(final Conversation conversation,
 239			final Uri uri, final UiCallback<Message> callback) {
 240		final Message message;
 241		if (conversation.getNextEncryption() == Message.ENCRYPTION_PGP) {
 242			message = new Message(conversation, "",
 243					Message.ENCRYPTION_DECRYPTED);
 244		} else {
 245			message = new Message(conversation, "",
 246					conversation.getNextEncryption());
 247		}
 248		message.setPresence(conversation.getNextPresence());
 249		message.setType(Message.TYPE_IMAGE);
 250		message.setStatus(Message.STATUS_OFFERED);
 251		new Thread(new Runnable() {
 252
 253			@Override
 254			public void run() {
 255				try {
 256					getFileBackend().copyImageToPrivateStorage(message, uri);
 257					if (conversation.getNextEncryption() == Message.ENCRYPTION_PGP) {
 258						getPgpEngine().encrypt(message, callback);
 259					} else {
 260						callback.success(message);
 261					}
 262				} catch (FileBackend.ImageCopyException e) {
 263					callback.error(e.getResId(), message);
 264				}
 265			}
 266		}).start();
 267		return message;
 268	}
 269
 270	public Conversation find(Bookmark bookmark) {
 271		return find(bookmark.getAccount(),bookmark.getJid());
 272	}
 273	
 274	public Conversation find(Account account, String jid) {
 275		return find(getConversations(),account,jid);
 276	}
 277
 278	public class XmppConnectionBinder extends Binder {
 279		public XmppConnectionService getService() {
 280			return XmppConnectionService.this;
 281		}
 282	}
 283
 284	@Override
 285	public int onStartCommand(Intent intent, int flags, int startId) {
 286		if ((intent != null)
 287				&& (ACTION_MERGE_PHONE_CONTACTS.equals(intent.getAction()))) {
 288			mergePhoneContactsWithRoster();
 289			return START_STICKY;
 290		} else if ((intent != null)
 291				&& (Intent.ACTION_SHUTDOWN.equals(intent.getAction()))) {
 292			logoutAndSave();
 293			return START_NOT_STICKY;
 294		}
 295		this.wakeLock.acquire();
 296		ConnectivityManager cm = (ConnectivityManager) getApplicationContext()
 297				.getSystemService(Context.CONNECTIVITY_SERVICE);
 298		NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
 299		boolean isConnected = activeNetwork != null
 300				&& activeNetwork.isConnected();
 301
 302		for (Account account : accounts) {
 303			if (!account.isOptionSet(Account.OPTION_DISABLED)) {
 304				if (!isConnected) {
 305					account.setStatus(Account.STATUS_NO_INTERNET);
 306					if (statusListener != null) {
 307						statusListener.onStatusChanged(account);
 308					}
 309				} else {
 310					if (account.getStatus() == Account.STATUS_NO_INTERNET) {
 311						account.setStatus(Account.STATUS_OFFLINE);
 312						if (statusListener != null) {
 313							statusListener.onStatusChanged(account);
 314						}
 315					}
 316					if (account.getStatus() == Account.STATUS_ONLINE) {
 317						long lastReceived = account.getXmppConnection().lastPaketReceived;
 318						long lastSent = account.getXmppConnection().lastPingSent;
 319						if (lastSent - lastReceived >= PING_TIMEOUT * 1000) {
 320							Log.d(LOGTAG, account.getJid() + ": ping timeout");
 321							this.reconnectAccount(account, true);
 322						} else if (SystemClock.elapsedRealtime() - lastReceived >= PING_MIN_INTERVAL * 1000) {
 323							account.getXmppConnection().sendPing();
 324							account.getXmppConnection().lastPingSent = SystemClock
 325									.elapsedRealtime();
 326							this.scheduleWakeupCall(2, false);
 327						}
 328					} else if (account.getStatus() == Account.STATUS_OFFLINE) {
 329						if (account.getXmppConnection() == null) {
 330							account.setXmppConnection(this
 331									.createConnection(account));
 332						}
 333						account.getXmppConnection().lastPingSent = SystemClock
 334								.elapsedRealtime();
 335						new Thread(account.getXmppConnection()).start();
 336					} else if ((account.getStatus() == Account.STATUS_CONNECTING)
 337							&& ((SystemClock.elapsedRealtime() - account
 338									.getXmppConnection().lastConnect) / 1000 >= CONNECT_TIMEOUT)) {
 339						Log.d(LOGTAG, account.getJid()
 340								+ ": time out during connect reconnecting");
 341						reconnectAccount(account, true);
 342					} else {
 343						if (account.getXmppConnection().getTimeToNextAttempt() <= 0) {
 344							reconnectAccount(account, true);
 345						}
 346					}
 347					// in any case. reschedule wakup call
 348					this.scheduleWakeupCall(PING_MAX_INTERVAL, true);
 349				}
 350				if (mOnAccountUpdate != null) {
 351					mOnAccountUpdate.onAccountUpdate();
 352				}
 353			}
 354		}
 355		if (wakeLock.isHeld()) {
 356			try {
 357				wakeLock.release();
 358			} catch (RuntimeException re) {
 359			}
 360		}
 361		return START_STICKY;
 362	}
 363
 364	@SuppressLint("TrulyRandom")
 365	@Override
 366	public void onCreate() {
 367		ExceptionHelper.init(getApplicationContext());
 368		PRNGFixes.apply();
 369		this.mRandom = new SecureRandom();
 370		this.mMemorizingTrustManager = new MemorizingTrustManager(getApplicationContext());
 371		this.databaseBackend = DatabaseBackend
 372				.getInstance(getApplicationContext());
 373		this.fileBackend = new FileBackend(getApplicationContext());
 374		this.accounts = databaseBackend.getAccounts();
 375
 376		for (Account account : this.accounts) {
 377			this.databaseBackend.readRoster(account.getRoster());
 378		}
 379		this.mergePhoneContactsWithRoster();
 380		this.getConversations();
 381
 382		getContentResolver().registerContentObserver(
 383				ContactsContract.Contacts.CONTENT_URI, true, contactObserver);
 384		this.pgpServiceConnection = new OpenPgpServiceConnection(
 385				getApplicationContext(), "org.sufficientlysecure.keychain");
 386		this.pgpServiceConnection.bindToService();
 387
 388		this.pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
 389		this.wakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK,
 390				"XmppConnectionService");
 391	}
 392
 393	@Override
 394	public void onDestroy() {
 395		super.onDestroy();
 396		this.logoutAndSave();
 397	}
 398
 399	@Override
 400	public void onTaskRemoved(Intent rootIntent) {
 401		super.onTaskRemoved(rootIntent);
 402		this.logoutAndSave();
 403	}
 404
 405	private void logoutAndSave() {
 406		for (Account account : accounts) {
 407			databaseBackend.writeRoster(account.getRoster());
 408			if (account.getXmppConnection() != null) {
 409				disconnect(account, false);
 410			}
 411		}
 412		Context context = getApplicationContext();
 413		AlarmManager alarmManager = (AlarmManager) context
 414				.getSystemService(Context.ALARM_SERVICE);
 415		Intent intent = new Intent(context, EventReceiver.class);
 416		alarmManager.cancel(PendingIntent.getBroadcast(context, 0, intent, 0));
 417		Log.d(LOGTAG, "good bye");
 418		stopSelf();
 419	}
 420
 421	protected void scheduleWakeupCall(int seconds, boolean ping) {
 422		long timeToWake = SystemClock.elapsedRealtime() + seconds * 1000;
 423		Context context = getApplicationContext();
 424		AlarmManager alarmManager = (AlarmManager) context
 425				.getSystemService(Context.ALARM_SERVICE);
 426
 427		if (ping) {
 428			if (this.pingIntent == null) {
 429				this.pingIntent = new Intent(context, EventReceiver.class);
 430				this.pingIntent.setAction("ping");
 431				this.pingIntent.putExtra("time", timeToWake);
 432				this.pendingPingIntent = PendingIntent.getBroadcast(context, 0,
 433						this.pingIntent, 0);
 434				alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP,
 435						timeToWake, pendingPingIntent);
 436			} else {
 437				long scheduledTime = this.pingIntent.getLongExtra("time", 0);
 438				if (scheduledTime < SystemClock.elapsedRealtime()
 439						|| (scheduledTime > timeToWake)) {
 440					this.pingIntent.putExtra("time", timeToWake);
 441					alarmManager.cancel(this.pendingPingIntent);
 442					this.pendingPingIntent = PendingIntent.getBroadcast(
 443							context, 0, this.pingIntent, 0);
 444					alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP,
 445							timeToWake, pendingPingIntent);
 446				}
 447			}
 448		} else {
 449			Intent intent = new Intent(context, EventReceiver.class);
 450			intent.setAction("ping_check");
 451			PendingIntent alarmIntent = PendingIntent.getBroadcast(context, 0,
 452					intent, 0);
 453			alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP, timeToWake,
 454					alarmIntent);
 455		}
 456
 457	}
 458
 459	public XmppConnection createConnection(Account account) {
 460		SharedPreferences sharedPref = getPreferences();
 461		account.setResource(sharedPref.getString("resource", "mobile")
 462				.toLowerCase(Locale.getDefault()));
 463		XmppConnection connection = new XmppConnection(account, this);
 464		connection.setOnMessagePacketReceivedListener(this.mMessageParser);
 465		connection.setOnStatusChangedListener(this.statusListener);
 466		connection.setOnPresencePacketReceivedListener(this.mPresenceParser);
 467		connection
 468				.setOnUnregisteredIqPacketReceivedListener(this.mIqParser);
 469		connection.setOnJinglePacketReceivedListener(this.jingleListener);
 470		connection.setOnBindListener(this.mOnBindListener);
 471		return connection;
 472	}
 473
 474	synchronized public void sendMessage(Message message) {
 475		Account account = message.getConversation().getAccount();
 476		Conversation conv = message.getConversation();
 477		MessagePacket packet = null;
 478		boolean saveInDb = true;
 479		boolean send = false;
 480		if (account.getStatus() == Account.STATUS_ONLINE) {
 481			if (message.getType() == Message.TYPE_IMAGE) {
 482				if (message.getPresence() != null) {
 483					if (message.getEncryption() == Message.ENCRYPTION_OTR) {
 484						if (!conv.hasValidOtrSession()
 485								&& (message.getPresence() != null)) {
 486							conv.startOtrSession(getApplicationContext(),
 487									message.getPresence(), true);
 488							message.setStatus(Message.STATUS_WAITING);
 489						} else if (conv.hasValidOtrSession()
 490								&& conv.getOtrSession().getSessionStatus() == SessionStatus.ENCRYPTED) {
 491							mJingleConnectionManager
 492									.createNewConnection(message);
 493						} else if (message.getPresence() == null) {
 494							message.setStatus(Message.STATUS_WAITING);
 495						}
 496					} else {
 497						mJingleConnectionManager.createNewConnection(message);
 498					}
 499				} else {
 500					message.setStatus(Message.STATUS_WAITING);
 501				}
 502			} else {
 503				if (message.getEncryption() == Message.ENCRYPTION_OTR) {
 504					if (!conv.hasValidOtrSession()
 505							&& (message.getPresence() != null)) {
 506						conv.startOtrSession(getApplicationContext(),
 507								message.getPresence(), true);
 508						message.setStatus(Message.STATUS_WAITING);
 509					} else if (conv.hasValidOtrSession()
 510							&& conv.getOtrSession().getSessionStatus() == SessionStatus.ENCRYPTED) {
 511						message.setPresence(conv.getOtrSession().getSessionID()
 512								.getUserID());
 513						packet = mMessageGenerator.generateOtrChat(message);
 514						send = true;
 515						message.setStatus(Message.STATUS_SEND);
 516						
 517					} else if (message.getPresence() == null) {
 518						message.setStatus(Message.STATUS_WAITING);
 519					}
 520				} else if (message.getEncryption() == Message.ENCRYPTION_DECRYPTED) {
 521					message.getConversation().endOtrIfNeeded();
 522					failWaitingOtrMessages(message.getConversation());
 523					packet = mMessageGenerator.generatePgpChat(message);
 524					message.setStatus(Message.STATUS_SEND);
 525					send = true;
 526				} else {
 527					message.getConversation().endOtrIfNeeded();
 528					failWaitingOtrMessages(message.getConversation());
 529					if (message.getConversation().getMode() == Conversation.MODE_SINGLE) {
 530						message.setStatus(Message.STATUS_SEND);
 531					}
 532					packet = mMessageGenerator.generateChat(message);
 533					send = true;
 534				}
 535			}
 536		} else {
 537			message.setStatus(Message.STATUS_WAITING);
 538			if (message.getType() == Message.TYPE_TEXT) {
 539				if (message.getEncryption() == Message.ENCRYPTION_DECRYPTED) {
 540					String pgpBody = message.getEncryptedBody();
 541					String decryptedBody = message.getBody();
 542					message.setBody(pgpBody);
 543					databaseBackend.createMessage(message);
 544					saveInDb = false;
 545					message.setBody(decryptedBody);
 546				} else if (message.getEncryption() == Message.ENCRYPTION_OTR) {
 547					if (conv.hasValidOtrSession()) {
 548						message.setPresence(conv.getOtrSession().getSessionID()
 549								.getUserID());
 550					} else if (!conv.hasValidOtrSession()
 551							&& message.getPresence() != null) {
 552						conv.startOtrSession(getApplicationContext(),
 553								message.getPresence(), false);
 554					}
 555				}
 556			}
 557
 558		}
 559		if (saveInDb) {
 560			databaseBackend.createMessage(message);
 561		}
 562		conv.getMessages().add(message);
 563		updateConversationUi();
 564		if ((send) && (packet != null)) {
 565			sendMessagePacket(account, packet);
 566		}
 567
 568	}
 569
 570	private void sendUnsendMessages(Conversation conversation) {
 571		for (int i = 0; i < conversation.getMessages().size(); ++i) {
 572			int status = conversation.getMessages().get(i).getStatus();
 573			if (status == Message.STATUS_WAITING) {
 574				resendMessage(conversation.getMessages().get(i));
 575			}
 576		}
 577	}
 578
 579	private void resendMessage(Message message) {
 580		Account account = message.getConversation().getAccount();
 581		MessagePacket packet = null;
 582		if (message.getEncryption() == Message.ENCRYPTION_OTR) {
 583			Presences presences = message.getConversation().getContact()
 584					.getPresences();
 585			if (!message.getConversation().hasValidOtrSession()) {
 586				if ((message.getPresence() != null)
 587						&& (presences.has(message.getPresence()))) {
 588					message.getConversation().startOtrSession(
 589							getApplicationContext(), message.getPresence(),
 590							true);
 591				} else {
 592					if (presences.size() == 1) {
 593						String presence = presences.asStringArray()[0];
 594						message.getConversation().startOtrSession(
 595								getApplicationContext(), presence, true);
 596					}
 597				}
 598			} else {
 599				if (message.getConversation().getOtrSession()
 600						.getSessionStatus() == SessionStatus.ENCRYPTED) {
 601					if (message.getType() == Message.TYPE_TEXT) {
 602						packet = mMessageGenerator.generateOtrChat(message,
 603								true);
 604					} else if (message.getType() == Message.TYPE_IMAGE) {
 605						mJingleConnectionManager.createNewConnection(message);
 606					}
 607				}
 608			}
 609		} else if (message.getType() == Message.TYPE_TEXT) {
 610			if (message.getEncryption() == Message.ENCRYPTION_NONE) {
 611				packet = mMessageGenerator.generateChat(message, true);
 612			} else if ((message.getEncryption() == Message.ENCRYPTION_DECRYPTED)
 613					|| (message.getEncryption() == Message.ENCRYPTION_PGP)) {
 614				packet = mMessageGenerator.generatePgpChat(message, true);
 615			}
 616		} else if (message.getType() == Message.TYPE_IMAGE) {
 617			Presences presences = message.getConversation().getContact()
 618					.getPresences();
 619			if ((message.getPresence() != null)
 620					&& (presences.has(message.getPresence()))) {
 621				markMessage(message, Message.STATUS_OFFERED);
 622				mJingleConnectionManager.createNewConnection(message);
 623			} else {
 624				if (presences.size() == 1) {
 625					String presence = presences.asStringArray()[0];
 626					message.setPresence(presence);
 627					markMessage(message, Message.STATUS_OFFERED);
 628					mJingleConnectionManager.createNewConnection(message);
 629				}
 630			}
 631		}
 632		if (packet != null) {
 633			sendMessagePacket(account,packet);
 634			markMessage(message, Message.STATUS_SEND);
 635		}
 636	}
 637
 638	public void fetchRosterFromServer(Account account) {
 639		IqPacket iqPacket = new IqPacket(IqPacket.TYPE_GET);
 640		if (!"".equals(account.getRosterVersion())) {
 641			Log.d(LOGTAG, account.getJid() + ": fetching roster version "
 642					+ account.getRosterVersion());
 643		} else {
 644			Log.d(LOGTAG, account.getJid() + ": fetching roster");
 645		}
 646		iqPacket.query("jabber:iq:roster").setAttribute("ver",
 647				account.getRosterVersion());
 648		account.getXmppConnection().sendIqPacket(iqPacket,
 649				new OnIqPacketReceived() {
 650
 651					@Override
 652					public void onIqPacketReceived(final Account account,
 653							IqPacket packet) {
 654						Element query = packet.findChild("query");
 655						if (query != null) {
 656							account.getRoster().markAllAsNotInRoster();
 657							mIqParser.rosterItems(account, query);
 658						}
 659					}
 660				});
 661	}
 662	
 663	public void fetchBookmarks(Account account) {
 664		IqPacket iqPacket = new IqPacket(IqPacket.TYPE_GET);
 665		Element query = iqPacket.query("jabber:iq:private");
 666		query.addChild("storage", "storage:bookmarks");
 667		OnIqPacketReceived callback = new OnIqPacketReceived() {
 668			
 669			@Override
 670			public void onIqPacketReceived(Account account, IqPacket packet) {
 671				Element query = packet.query();
 672				List<Bookmark> bookmarks = new ArrayList<Bookmark>();
 673				Element storage = query.findChild("storage", "storage:bookmarks");
 674				if (storage!=null) {
 675					for(Element item : storage.getChildren()) {
 676						if (item.getName().equals("conference")) {
 677							Bookmark bookmark = Bookmark.parse(item,account);
 678							bookmarks.add(bookmark);
 679							Conversation conversation = find(bookmark);
 680							if (conversation!=null) {
 681								conversation.setBookmark(bookmark);
 682							} else {
 683								if (bookmark.autojoin()) {
 684									conversation = findOrCreateConversation(account, bookmark.getJid(), true);
 685									conversation.setBookmark(bookmark);
 686									joinMuc(conversation);
 687								}
 688							}
 689						}
 690					}
 691				}
 692				account.setBookmarks(bookmarks);
 693			}
 694		};
 695		sendIqPacket(account, iqPacket, callback);
 696		
 697	}
 698	
 699	public void pushBookmarks(Account account) {
 700		IqPacket iqPacket = new IqPacket(IqPacket.TYPE_SET);
 701		Element query = iqPacket.query("jabber:iq:private");
 702		Element storage = query.addChild("storage", "storage:bookmarks");
 703		for(Bookmark bookmark : account.getBookmarks()) {
 704			storage.addChild(bookmark.toElement());
 705		}
 706		sendIqPacket(account, iqPacket,null);
 707	}
 708
 709	private void mergePhoneContactsWithRoster() {
 710		PhoneHelper.loadPhoneContacts(getApplicationContext(),
 711				new OnPhoneContactsLoadedListener() {
 712					@Override
 713					public void onPhoneContactsLoaded(List<Bundle> phoneContacts) {
 714						for (Account account : accounts) {
 715							account.getRoster().clearSystemAccounts();
 716						}
 717						for (Bundle phoneContact : phoneContacts) {
 718							for (Account account : accounts) {
 719								String jid = phoneContact.getString("jid");
 720								Contact contact = account.getRoster()
 721										.getContact(jid);
 722								String systemAccount = phoneContact
 723										.getInt("phoneid")
 724										+ "#"
 725										+ phoneContact.getString("lookup");
 726								contact.setSystemAccount(systemAccount);
 727								contact.setPhotoUri(phoneContact
 728										.getString("photouri"));
 729								contact.setSystemName(phoneContact
 730										.getString("displayname"));
 731							}
 732						}
 733					}
 734				});
 735	}
 736
 737	public List<Conversation> getConversations() {
 738		if (this.conversations == null) {
 739			Hashtable<String, Account> accountLookupTable = new Hashtable<String, Account>();
 740			for (Account account : this.accounts) {
 741				accountLookupTable.put(account.getUuid(), account);
 742			}
 743			this.conversations = databaseBackend
 744					.getConversations(Conversation.STATUS_AVAILABLE);
 745			for (Conversation conv : this.conversations) {
 746				Account account = accountLookupTable.get(conv.getAccountUuid());
 747				conv.setAccount(account);
 748				conv.setMessages(databaseBackend.getMessages(conv, 50));
 749			}
 750		}
 751		
 752		return this.conversations;
 753	}
 754	
 755	public void populateWithOrderedConversations(List<Conversation> list) {
 756		list.clear();
 757		list.addAll(getConversations());
 758		Collections.sort(list, new Comparator<Conversation>() {
 759			@Override
 760			public int compare(Conversation lhs, Conversation rhs) {
 761				Message left = lhs.getLatestMessage();
 762				Message right = rhs.getLatestMessage();
 763				if (left.getTimeSent() > right.getTimeSent()) {
 764					return -1;
 765				} else if (left.getTimeSent() < right.getTimeSent()) {
 766					return 1;
 767				} else {
 768					return 0;
 769				}
 770			}
 771		});
 772	}
 773
 774	public List<Message> getMoreMessages(Conversation conversation,
 775			long timestamp) {
 776		List<Message> messages = databaseBackend.getMessages(conversation, 50,
 777				timestamp);
 778		for (Message message : messages) {
 779			message.setConversation(conversation);
 780		}
 781		return messages;
 782	}
 783
 784	public List<Account> getAccounts() {
 785		return this.accounts;
 786	}
 787
 788	public Conversation find(List<Conversation> haystack, Contact contact) {
 789		for (Conversation conversation : haystack) {
 790			if (conversation.getContact() == contact) {
 791				return conversation;
 792			}
 793		}
 794		return null;
 795	}
 796
 797	public Conversation find(List<Conversation> haystack, Account account, String jid) {
 798		for (Conversation conversation : haystack) {
 799			if ((conversation.getAccount().equals(account))
 800					&& (conversation.getContactJid().split("/")[0].equals(jid))) {
 801				return conversation;
 802			}
 803		}
 804		return null;
 805	}
 806	
 807	
 808	public Conversation findOrCreateConversation(Account account, String jid,
 809			boolean muc) {
 810		Conversation conversation = find(account, jid);
 811		if (conversation != null) {
 812			return conversation;
 813		}
 814		conversation = databaseBackend.findConversation(account,jid);
 815		if (conversation != null) {
 816			conversation.setStatus(Conversation.STATUS_AVAILABLE);
 817			conversation.setAccount(account);
 818			if (muc) {
 819				conversation.setMode(Conversation.MODE_MULTI);
 820			} else {
 821				conversation.setMode(Conversation.MODE_SINGLE);
 822			}
 823			conversation.setMessages(databaseBackend.getMessages(conversation,
 824					50));
 825			this.databaseBackend.updateConversation(conversation);
 826		} else {
 827			String conversationName;
 828			Contact contact = account.getRoster().getContact(jid);
 829			if (contact != null) {
 830				conversationName = contact.getDisplayName();
 831			} else {
 832				conversationName = jid.split("@")[0];
 833			}
 834			if (muc) {
 835				conversation = new Conversation(conversationName, account, jid,
 836						Conversation.MODE_MULTI);
 837			} else {
 838				conversation = new Conversation(conversationName, account, jid,
 839						Conversation.MODE_SINGLE);
 840			}
 841			this.databaseBackend.createConversation(conversation);
 842		}
 843		this.conversations.add(conversation);
 844		updateConversationUi();
 845		return conversation;
 846	}
 847
 848	public void archiveConversation(Conversation conversation) {
 849		if (conversation.getMode() == Conversation.MODE_MULTI) {
 850			Bookmark bookmark = conversation.getBookmark();
 851			if (bookmark!=null && bookmark.autojoin()) {
 852				bookmark.setAutojoin(false);
 853				pushBookmarks(bookmark.getAccount());
 854			}
 855			leaveMuc(conversation);
 856		} else {
 857			conversation.endOtrIfNeeded();
 858		}
 859		this.databaseBackend.updateConversation(conversation);
 860		this.conversations.remove(conversation);
 861		updateConversationUi();
 862	}
 863
 864	public void clearConversationHistory(Conversation conversation) {
 865		this.databaseBackend.deleteMessagesInConversation(conversation);
 866		this.fileBackend.removeFiles(conversation);
 867		conversation.getMessages().clear();
 868		updateConversationUi();
 869	}
 870
 871	public int getConversationCount() {
 872		return this.databaseBackend.getConversationCount();
 873	}
 874
 875	public void createAccount(Account account) {
 876		databaseBackend.createAccount(account);
 877		this.accounts.add(account);
 878		this.reconnectAccount(account, false);
 879		updateAccountUi();
 880	}
 881
 882	public void updateAccount(Account account) {
 883		this.statusListener.onStatusChanged(account);
 884		databaseBackend.updateAccount(account);
 885		reconnectAccount(account, false);
 886		updateAccountUi();
 887		UIHelper.showErrorNotification(getApplicationContext(), getAccounts());
 888	}
 889
 890	public void deleteAccount(Account account) {
 891		for(Conversation conversation : conversations) {
 892			if (conversation.getAccount() == account) {
 893				if (conversation.getMode() == Conversation.MODE_MULTI) {
 894					leaveMuc(conversation);
 895				} else if (conversation.getMode() == Conversation.MODE_SINGLE) {
 896					conversation.endOtrIfNeeded();
 897				}
 898				conversations.remove(conversation);
 899			}
 900		}
 901		if (account.getXmppConnection() != null) {
 902			this.disconnect(account, true);
 903		}
 904		databaseBackend.deleteAccount(account);
 905		this.accounts.remove(account);
 906		updateAccountUi();
 907		UIHelper.showErrorNotification(getApplicationContext(), getAccounts());
 908	}
 909
 910	public void setOnConversationListChangedListener(
 911			OnConversationUpdate listener) {
 912		this.mOnConversationUpdate = listener;
 913		this.convChangedListenerCount++;
 914	}
 915
 916	public void removeOnConversationListChangedListener() {
 917		this.convChangedListenerCount--;
 918		if (this.convChangedListenerCount == 0) {
 919			this.mOnConversationUpdate = null;
 920		}
 921	}
 922
 923	public void setOnAccountListChangedListener(OnAccountUpdate listener) {
 924		this.mOnAccountUpdate = listener;
 925	}
 926
 927	public void removeOnAccountListChangedListener() {
 928		this.mOnAccountUpdate = null;
 929	}
 930	
 931	public void setOnRosterUpdateListener(OnRosterUpdate listener) {
 932		this.mOnRosterUpdate = listener;
 933	}
 934
 935	public void removeOnRosterUpdateListener() {
 936		this.mOnRosterUpdate = null;
 937	}
 938
 939	public void connectMultiModeConversations(Account account) {
 940		List<Conversation> conversations = getConversations();
 941		for (int i = 0; i < conversations.size(); i++) {
 942			Conversation conversation = conversations.get(i);
 943			if ((conversation.getMode() == Conversation.MODE_MULTI)
 944					&& (conversation.getAccount() == account)) {
 945				joinMuc(conversation);
 946			}
 947		}
 948	}
 949
 950	public void joinMuc(Conversation conversation) {
 951		Account account = conversation.getAccount();
 952		account.pendingConferenceJoins.remove(conversation);
 953		account.pendingConferenceLeaves.remove(conversation);
 954		if (account.getStatus() == Account.STATUS_ONLINE) {
 955			Log.d(LOGTAG,"joining conversation "+conversation.getContactJid());
 956			String nick = conversation.getMucOptions().getProposedNick();
 957			conversation.getMucOptions().setJoinNick(nick);
 958			PresencePacket packet = new PresencePacket();
 959			String joinJid = conversation.getMucOptions().getJoinJid();
 960			packet.setAttribute("to",conversation.getMucOptions().getJoinJid());
 961			Element x = new Element("x");
 962			x.setAttribute("xmlns", "http://jabber.org/protocol/muc");
 963			String sig = account.getPgpSignature();
 964			if (sig != null) {
 965				packet.addChild("status").setContent("online");
 966				packet.addChild("x", "jabber:x:signed").setContent(sig);
 967			}
 968			if (conversation.getMessages().size() != 0) {
 969				final SimpleDateFormat mDateFormat = new SimpleDateFormat(
 970						"yyyy-MM-dd'T'HH:mm:ss.SSS'Z'", Locale.US);
 971				mDateFormat.setTimeZone(TimeZone.getTimeZone("UTC"));
 972				Date date = new Date(
 973						conversation.getLatestMessage().getTimeSent() + 1000);
 974				x.addChild("history").setAttribute("since",
 975						mDateFormat.format(date));
 976			}
 977			packet.addChild(x);
 978			sendPresencePacket(account, packet);
 979			if (!joinJid.equals(conversation.getContactJid())) {
 980				conversation.setContactJid(joinJid);
 981				databaseBackend.updateConversation(conversation);
 982			}
 983		} else {
 984			account.pendingConferenceJoins.add(conversation);
 985		}
 986	}
 987
 988	private OnRenameListener renameListener = null;
 989	private IqGenerator mIqGenerator = new IqGenerator();
 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 void failWaitingOtrMessages(Conversation conversation) {
1323		for (Message message : conversation.getMessages()) {
1324			if (message.getEncryption() == Message.ENCRYPTION_OTR
1325					&& message.getStatus() == Message.STATUS_WAITING) {
1326				markMessage(message, Message.STATUS_SEND_FAILED);
1327			}
1328		}
1329	}
1330
1331	public SecureRandom getRNG() {
1332		return this.mRandom;
1333	}
1334	
1335	public MemorizingTrustManager getMemorizingTrustManager() {
1336		return this.mMemorizingTrustManager;
1337	}
1338
1339	public PowerManager getPowerManager() {
1340		return this.pm;
1341	}
1342
1343	public void replyWithNotAcceptable(Account account, MessagePacket packet) {
1344		if (account.getStatus() == Account.STATUS_ONLINE) {
1345			MessagePacket error = this.mMessageGenerator
1346					.generateNotAcceptable(packet);
1347			sendMessagePacket(account,error);
1348		}
1349	}
1350
1351	public void syncRosterToDisk(final Account account) {
1352		new Thread(new Runnable() {
1353
1354			@Override
1355			public void run() {
1356				databaseBackend.writeRoster(account.getRoster());
1357			}
1358		}).start();
1359
1360	}
1361
1362	public List<String> getKnownHosts() {
1363		List<String> hosts = new ArrayList<String>();
1364		for (Account account : getAccounts()) {
1365			if (!hosts.contains(account.getServer())) {
1366				hosts.add(account.getServer());
1367			}
1368			for (Contact contact : account.getRoster().getContacts()) {
1369				if (contact.showInRoster()) {
1370					String server = contact.getServer();
1371					if (server != null && !hosts.contains(server)) {
1372						hosts.add(server);
1373					}
1374				}
1375			}
1376		}
1377		return hosts;
1378	}
1379
1380	public List<String> getKnownConferenceHosts() {
1381		ArrayList<String> mucServers = new ArrayList<String>();
1382		for (Account account : accounts) {
1383			if (account.getXmppConnection() != null) {
1384				String server = account.getXmppConnection().getMucServer();
1385				if (server != null) {
1386					mucServers.add(server);
1387				}
1388			}
1389		}
1390		return mucServers;
1391	}
1392	
1393	public void sendMessagePacket(Account account, MessagePacket packet) {
1394		account.getXmppConnection().sendMessagePacket(packet);
1395	}
1396	
1397	public void sendPresencePacket(Account account, PresencePacket packet) {
1398		account.getXmppConnection().sendPresencePacket(packet);
1399	}
1400	
1401	public void sendIqPacket(Account account, IqPacket packet, OnIqPacketReceived callback) {
1402		account.getXmppConnection().sendIqPacket(packet, callback);
1403	}
1404	
1405	public MessageGenerator getMessageGenerator() {
1406		return this.mMessageGenerator;
1407	}
1408	
1409	public PresenceGenerator getPresenceGenerator() {
1410		return this.mPresenceGenerator;
1411	}
1412	
1413	public IqGenerator getIqGenerator() {
1414		return this.mIqGenerator ;
1415	}
1416	
1417	public JingleConnectionManager getJingleConnectionManager() {
1418		return this.mJingleConnectionManager;
1419	}
1420	
1421	public interface OnConversationUpdate {
1422		public void onConversationUpdate();
1423	}
1424	
1425	public interface OnAccountUpdate {
1426		public void onAccountUpdate();
1427	}
1428	
1429	public interface OnRosterUpdate {
1430		public void onRosterUpdate();
1431	}
1432}