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