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