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								}
 695							}
 696						}
 697					}
 698				}
 699				account.setBookmarks(bookmarks);
 700			}
 701		};
 702		sendIqPacket(account, iqPacket, callback);
 703		
 704	}
 705	
 706	public void pushBookmarks(Account account) {
 707		IqPacket iqPacket = new IqPacket(IqPacket.TYPE_SET);
 708		Element query = iqPacket.query("jabber:iq:private");
 709		Element storage = query.addChild("storage", "storage:bookmarks");
 710		for(Bookmark bookmark : account.getBookmarks()) {
 711			storage.addChild(bookmark.toElement());
 712		}
 713		sendIqPacket(account, iqPacket,null);
 714	}
 715
 716	private void mergePhoneContactsWithRoster() {
 717		PhoneHelper.loadPhoneContacts(getApplicationContext(),
 718				new OnPhoneContactsLoadedListener() {
 719					@Override
 720					public void onPhoneContactsLoaded(List<Bundle> phoneContacts) {
 721						for (Account account : accounts) {
 722							account.getRoster().clearSystemAccounts();
 723						}
 724						for (Bundle phoneContact : phoneContacts) {
 725							for (Account account : accounts) {
 726								String jid = phoneContact.getString("jid");
 727								Contact contact = account.getRoster()
 728										.getContact(jid);
 729								String systemAccount = phoneContact
 730										.getInt("phoneid")
 731										+ "#"
 732										+ phoneContact.getString("lookup");
 733								contact.setSystemAccount(systemAccount);
 734								contact.setPhotoUri(phoneContact
 735										.getString("photouri"));
 736								contact.setSystemName(phoneContact
 737										.getString("displayname"));
 738							}
 739						}
 740					}
 741				});
 742	}
 743
 744	public List<Conversation> getConversations() {
 745		if (this.conversations == null) {
 746			Hashtable<String, Account> accountLookupTable = new Hashtable<String, Account>();
 747			for (Account account : this.accounts) {
 748				accountLookupTable.put(account.getUuid(), account);
 749			}
 750			this.conversations = databaseBackend
 751					.getConversations(Conversation.STATUS_AVAILABLE);
 752			for (Conversation conv : this.conversations) {
 753				Account account = accountLookupTable.get(conv.getAccountUuid());
 754				conv.setAccount(account);
 755				conv.setMessages(databaseBackend.getMessages(conv, 50));
 756			}
 757		}
 758		
 759		return this.conversations;
 760	}
 761	
 762	public void populateWithOrderedConversations(List<Conversation> list) {
 763		list.clear();
 764		list.addAll(getConversations());
 765		Collections.sort(list, new Comparator<Conversation>() {
 766			@Override
 767			public int compare(Conversation lhs, Conversation rhs) {
 768				Message left = lhs.getLatestMessage();
 769				Message right = rhs.getLatestMessage();
 770				if (left.getTimeSent() > right.getTimeSent()) {
 771					return -1;
 772				} else if (left.getTimeSent() < right.getTimeSent()) {
 773					return 1;
 774				} else {
 775					return 0;
 776				}
 777			}
 778		});
 779	}
 780
 781	public List<Message> getMoreMessages(Conversation conversation,
 782			long timestamp) {
 783		List<Message> messages = databaseBackend.getMessages(conversation, 50,
 784				timestamp);
 785		for (Message message : messages) {
 786			message.setConversation(conversation);
 787		}
 788		return messages;
 789	}
 790
 791	public List<Account> getAccounts() {
 792		return this.accounts;
 793	}
 794
 795	public Conversation findActiveConversation(Contact contact) {
 796		for (Conversation conversation : this.getConversations()) {
 797			if (conversation.getContact() == contact) {
 798				return conversation;
 799			}
 800		}
 801		return null;
 802	}
 803
 804	public Conversation findOrCreateConversation(Account account, String jid,
 805			boolean muc) {
 806		for (Conversation conv : this.getConversations()) {
 807			if ((conv.getAccount().equals(account))
 808					&& (conv.getContactJid().split("/")[0].equals(jid))) {
 809				return conv;
 810			}
 811		}
 812		Conversation conversation = databaseBackend.findConversation(account,
 813				jid);
 814		if (conversation != null) {
 815			conversation.setStatus(Conversation.STATUS_AVAILABLE);
 816			conversation.setAccount(account);
 817			if (muc) {
 818				conversation.setMode(Conversation.MODE_MULTI);
 819			} else {
 820				conversation.setMode(Conversation.MODE_SINGLE);
 821			}
 822			conversation.setMessages(databaseBackend.getMessages(conversation,
 823					50));
 824			this.databaseBackend.updateConversation(conversation);
 825		} else {
 826			String conversationName;
 827			Contact contact = account.getRoster().getContact(jid);
 828			if (contact != null) {
 829				conversationName = contact.getDisplayName();
 830			} else {
 831				conversationName = jid.split("@")[0];
 832			}
 833			if (muc) {
 834				conversation = new Conversation(conversationName, account, jid,
 835						Conversation.MODE_MULTI);
 836			} else {
 837				conversation = new Conversation(conversationName, account, jid,
 838						Conversation.MODE_SINGLE);
 839			}
 840			this.databaseBackend.createConversation(conversation);
 841		}
 842		this.conversations.add(conversation);
 843		if ((account.getStatus() == Account.STATUS_ONLINE)
 844				&& (conversation.getMode() == Conversation.MODE_MULTI)) {
 845			joinMuc(conversation);
 846		}
 847		updateConversationUi();
 848		return conversation;
 849	}
 850
 851	public void archiveConversation(Conversation conversation) {
 852		if (conversation.getMode() == Conversation.MODE_MULTI) {
 853			Bookmark bookmark = conversation.getBookmark();
 854			if (bookmark!=null && bookmark.autojoin()) {
 855				bookmark.setAutojoin(false);
 856				pushBookmarks(bookmark.getAccount());
 857			}
 858			leaveMuc(conversation);
 859		} else {
 860			conversation.endOtrIfNeeded();
 861		}
 862		this.databaseBackend.updateConversation(conversation);
 863		this.conversations.remove(conversation);
 864		updateConversationUi();
 865	}
 866
 867	public void clearConversationHistory(Conversation conversation) {
 868		this.databaseBackend.deleteMessagesInConversation(conversation);
 869		this.fileBackend.removeFiles(conversation);
 870		conversation.getMessages().clear();
 871		updateConversationUi();
 872	}
 873
 874	public int getConversationCount() {
 875		return this.databaseBackend.getConversationCount();
 876	}
 877
 878	public void createAccount(Account account) {
 879		databaseBackend.createAccount(account);
 880		this.accounts.add(account);
 881		this.reconnectAccount(account, false);
 882		updateAccountUi();
 883	}
 884
 885	public void updateAccount(Account account) {
 886		this.statusListener.onStatusChanged(account);
 887		databaseBackend.updateAccount(account);
 888		reconnectAccount(account, false);
 889		updateAccountUi();
 890		UIHelper.showErrorNotification(getApplicationContext(), getAccounts());
 891	}
 892
 893	public void deleteAccount(Account account) {
 894		if (account.getXmppConnection() != null) {
 895			this.disconnect(account, true);
 896		}
 897		databaseBackend.deleteAccount(account);
 898		this.accounts.remove(account);
 899		updateAccountUi();
 900		UIHelper.showErrorNotification(getApplicationContext(), getAccounts());
 901	}
 902
 903	public void setOnConversationListChangedListener(
 904			OnConversationUpdate listener) {
 905		this.mOnConversationUpdate = listener;
 906		this.convChangedListenerCount++;
 907	}
 908
 909	public void removeOnConversationListChangedListener() {
 910		this.convChangedListenerCount--;
 911		if (this.convChangedListenerCount == 0) {
 912			this.mOnConversationUpdate = null;
 913		}
 914	}
 915
 916	public void setOnAccountListChangedListener(OnAccountUpdate listener) {
 917		this.mOnAccountUpdate = listener;
 918	}
 919
 920	public void removeOnAccountListChangedListener() {
 921		this.mOnAccountUpdate = null;
 922	}
 923
 924	public void connectMultiModeConversations(Account account) {
 925		List<Conversation> conversations = getConversations();
 926		for (int i = 0; i < conversations.size(); i++) {
 927			Conversation conversation = conversations.get(i);
 928			if ((conversation.getMode() == Conversation.MODE_MULTI)
 929					&& (conversation.getAccount() == account)) {
 930				joinMuc(conversation);
 931			}
 932		}
 933	}
 934
 935	public void joinMuc(Conversation conversation) {
 936		Account account = conversation.getAccount();
 937		String[] mucParts = conversation.getContactJid().split("/");
 938		String muc;
 939		String nick;
 940		if (mucParts.length == 2) {
 941			muc = mucParts[0];
 942			nick = mucParts[1];
 943		} else {
 944			muc = mucParts[0];
 945			nick = account.getUsername();
 946		}
 947		PresencePacket packet = new PresencePacket();
 948		packet.setAttribute("to", muc + "/" + nick);
 949		Element x = new Element("x");
 950		x.setAttribute("xmlns", "http://jabber.org/protocol/muc");
 951		String sig = account.getPgpSignature();
 952		if (sig != null) {
 953			packet.addChild("status").setContent("online");
 954			packet.addChild("x", "jabber:x:signed").setContent(sig);
 955		}
 956		if (conversation.getMessages().size() != 0) {
 957			final SimpleDateFormat mDateFormat = new SimpleDateFormat(
 958					"yyyy-MM-dd'T'HH:mm:ss.SSS'Z'", Locale.US);
 959			mDateFormat.setTimeZone(TimeZone.getTimeZone("UTC"));
 960			Date date = new Date(
 961					conversation.getLatestMessage().getTimeSent() + 1000);
 962			x.addChild("history").setAttribute("since",
 963					mDateFormat.format(date));
 964		}
 965		packet.addChild(x);
 966		sendPresencePacket(account, packet);
 967	}
 968
 969	private OnRenameListener renameListener = null;
 970
 971	public void setOnRenameListener(OnRenameListener listener) {
 972		this.renameListener = listener;
 973	}
 974
 975	public void renameInMuc(final Conversation conversation, final String nick) {
 976		final MucOptions options = conversation.getMucOptions();
 977		if (options.online()) {
 978			Account account = conversation.getAccount();
 979			options.setOnRenameListener(new OnRenameListener() {
 980
 981				@Override
 982				public void onRename(boolean success) {
 983					if (renameListener != null) {
 984						renameListener.onRename(success);
 985					}
 986					if (success) {
 987						String jid = conversation.getContactJid().split("/")[0]
 988								+ "/" + nick;
 989						conversation.setContactJid(jid);
 990						databaseBackend.updateConversation(conversation);
 991					}
 992				}
 993			});
 994			options.flagAboutToRename();
 995			PresencePacket packet = new PresencePacket();
 996			packet.setAttribute("to",
 997					conversation.getContactJid().split("/")[0] + "/" + nick);
 998			packet.setAttribute("from", conversation.getAccount().getFullJid());
 999
1000			String sig = account.getPgpSignature();
1001			if (sig != null) {
1002				packet.addChild("status").setContent("online");
1003				packet.addChild("x", "jabber:x:signed").setContent(sig);
1004			}
1005			sendPresencePacket(account,packet);
1006		} else {
1007			String jid = conversation.getContactJid().split("/")[0] + "/"
1008					+ nick;
1009			conversation.setContactJid(jid);
1010			databaseBackend.updateConversation(conversation);
1011			if (conversation.getAccount().getStatus() == Account.STATUS_ONLINE) {
1012				joinMuc(conversation);
1013			}
1014		}
1015	}
1016
1017	public void leaveMuc(Conversation conversation) {
1018		PresencePacket packet = new PresencePacket();
1019		packet.setAttribute("to", conversation.getContactJid().split("/")[0]
1020				+ "/" + conversation.getMucOptions().getNick());
1021		packet.setAttribute("from", conversation.getAccount().getFullJid());
1022		packet.setAttribute("type", "unavailable");
1023		sendPresencePacket(conversation.getAccount(),packet);
1024		conversation.getMucOptions().setOffline();
1025		conversation.deregisterWithBookmark();
1026		Log.d(LOGTAG,conversation.getAccount().getJid()+" leaving muc "+conversation.getContactJid());
1027	}
1028
1029	public void disconnect(Account account, boolean force) {
1030		if ((account.getStatus() == Account.STATUS_ONLINE)
1031				|| (account.getStatus() == Account.STATUS_DISABLED)) {
1032			if (!force) {
1033				List<Conversation> conversations = getConversations();
1034				for (int i = 0; i < conversations.size(); i++) {
1035					Conversation conversation = conversations.get(i);
1036					if (conversation.getAccount() == account) {
1037						if (conversation.getMode() == Conversation.MODE_MULTI) {
1038							leaveMuc(conversation);
1039						} else {
1040							conversation.endOtrIfNeeded();
1041						}
1042					}
1043				}
1044			}
1045			account.getXmppConnection().disconnect(force);
1046		}
1047	}
1048
1049	@Override
1050	public IBinder onBind(Intent intent) {
1051		return mBinder;
1052	}
1053
1054	public void updateMessage(Message message) {
1055		databaseBackend.updateMessage(message);
1056	}
1057
1058	protected void syncDirtyContacts(Account account) {
1059		for (Contact contact : account.getRoster().getContacts()) {
1060			if (contact.getOption(Contact.Options.DIRTY_PUSH)) {
1061				pushContactToServer(contact);
1062			}
1063			if (contact.getOption(Contact.Options.DIRTY_DELETE)) {
1064				Log.d(LOGTAG, "dirty delete");
1065				deleteContactOnServer(contact);
1066			}
1067		}
1068	}
1069
1070	public void createContact(Contact contact) {
1071		SharedPreferences sharedPref = getPreferences();
1072		boolean autoGrant = sharedPref.getBoolean("grant_new_contacts", true);
1073		if (autoGrant) {
1074			contact.setOption(Contact.Options.PREEMPTIVE_GRANT);
1075			contact.setOption(Contact.Options.ASKING);
1076		}
1077		pushContactToServer(contact);
1078	}
1079
1080	public void onOtrSessionEstablished(Conversation conversation) {
1081		Account account = conversation.getAccount();
1082		List<Message> messages = conversation.getMessages();
1083		Session otrSession = conversation.getOtrSession();
1084		Log.d(LOGTAG, account.getJid() + " otr session established with "
1085				+ conversation.getContactJid() + "/"
1086				+ otrSession.getSessionID().getUserID());
1087		for (int i = 0; i < messages.size(); ++i) {
1088			Message msg = messages.get(i);
1089			if ((msg.getStatus() == Message.STATUS_UNSEND || msg.getStatus() == Message.STATUS_WAITING)
1090					&& (msg.getEncryption() == Message.ENCRYPTION_OTR)) {
1091				msg.setPresence(otrSession.getSessionID().getUserID());
1092				if (msg.getType() == Message.TYPE_TEXT) {
1093					MessagePacket outPacket = mMessageGenerator
1094							.generateOtrChat(msg, true);
1095					if (outPacket != null) {
1096						msg.setStatus(Message.STATUS_SEND);
1097						databaseBackend.updateMessage(msg);
1098						sendMessagePacket(account,outPacket);
1099					}
1100				} else if (msg.getType() == Message.TYPE_IMAGE) {
1101					mJingleConnectionManager.createNewConnection(msg);
1102				}
1103			}
1104		}
1105		notifyUi(conversation, false);
1106	}
1107
1108	public boolean renewSymmetricKey(Conversation conversation) {
1109		Account account = conversation.getAccount();
1110		byte[] symmetricKey = new byte[32];
1111		this.mRandom.nextBytes(symmetricKey);
1112		Session otrSession = conversation.getOtrSession();
1113		if (otrSession != null) {
1114			MessagePacket packet = new MessagePacket();
1115			packet.setType(MessagePacket.TYPE_CHAT);
1116			packet.setFrom(account.getFullJid());
1117			packet.addChild("private", "urn:xmpp:carbons:2");
1118			packet.addChild("no-copy", "urn:xmpp:hints");
1119			packet.setTo(otrSession.getSessionID().getAccountID() + "/"
1120					+ otrSession.getSessionID().getUserID());
1121			try {
1122				packet.setBody(otrSession
1123						.transformSending(CryptoHelper.FILETRANSFER
1124								+ CryptoHelper.bytesToHex(symmetricKey)));
1125				sendMessagePacket(account,packet);
1126				conversation.setSymmetricKey(symmetricKey);
1127				return true;
1128			} catch (OtrException e) {
1129				return false;
1130			}
1131		}
1132		return false;
1133	}
1134
1135	public void pushContactToServer(Contact contact) {
1136		contact.resetOption(Contact.Options.DIRTY_DELETE);
1137		contact.setOption(Contact.Options.DIRTY_PUSH);
1138		Account account = contact.getAccount();
1139		if (account.getStatus() == Account.STATUS_ONLINE) {
1140			boolean ask = contact.getOption(Contact.Options.ASKING);
1141			boolean sendUpdates = contact.getOption(Contact.Options.PENDING_SUBSCRIPTION_REQUEST)
1142					&& contact.getOption(Contact.Options.PREEMPTIVE_GRANT);
1143			IqPacket iq = new IqPacket(IqPacket.TYPE_SET);
1144			iq.query("jabber:iq:roster").addChild(contact.asElement());
1145			account.getXmppConnection().sendIqPacket(iq, null);
1146			if (sendUpdates) {
1147				sendPresencePacket(account, mPresenceGenerator.sendPresenceUpdatesTo(contact));
1148			}
1149			if (ask) {
1150				sendPresencePacket(account, mPresenceGenerator.requestPresenceUpdatesFrom(contact));
1151			}
1152		}
1153	}
1154
1155	public void deleteContactOnServer(Contact contact) {
1156		contact.resetOption(Contact.Options.PREEMPTIVE_GRANT);
1157		contact.resetOption(Contact.Options.DIRTY_PUSH);
1158		contact.setOption(Contact.Options.DIRTY_DELETE);
1159		Account account = contact.getAccount();
1160		if (account.getStatus() == Account.STATUS_ONLINE) {
1161			IqPacket iq = new IqPacket(IqPacket.TYPE_SET);
1162			Element item = iq.query("jabber:iq:roster").addChild("item");
1163			item.setAttribute("jid", contact.getJid());
1164			item.setAttribute("subscription", "remove");
1165			account.getXmppConnection().sendIqPacket(iq, null);
1166		}
1167	}
1168
1169	public void updateConversation(Conversation conversation) {
1170		this.databaseBackend.updateConversation(conversation);
1171	}
1172
1173	public void removeOnTLSExceptionReceivedListener() {
1174		this.tlsException = null;
1175	}
1176
1177	public void reconnectAccount(final Account account, final boolean force) {
1178		new Thread(new Runnable() {
1179
1180			@Override
1181			public void run() {
1182				if (account.getXmppConnection() != null) {
1183					disconnect(account, force);
1184				}
1185				if (!account.isOptionSet(Account.OPTION_DISABLED)) {
1186					if (account.getXmppConnection() == null) {
1187						account.setXmppConnection(createConnection(account));
1188					}
1189					Thread thread = new Thread(account.getXmppConnection());
1190					thread.start();
1191					scheduleWakeupCall((int) (CONNECT_TIMEOUT * 1.2), false);
1192				}
1193			}
1194		}).start();
1195	}
1196
1197	public void inviteToConference(Conversation conversation,
1198			List<Contact> contacts) {
1199		for (Contact contact : contacts) {
1200			MessagePacket packet = new MessagePacket();
1201			packet.setTo(conversation.getContactJid().split("/")[0]);
1202			packet.setFrom(conversation.getAccount().getFullJid());
1203			Element x = new Element("x");
1204			x.setAttribute("xmlns", "http://jabber.org/protocol/muc#user");
1205			Element invite = new Element("invite");
1206			invite.setAttribute("to", contact.getJid());
1207			x.addChild(invite);
1208			packet.addChild(x);
1209			Log.d(LOGTAG, packet.toString());
1210			sendMessagePacket(conversation.getAccount(),packet);
1211		}
1212
1213	}
1214
1215	public boolean markMessage(Account account, String recipient, String uuid,
1216			int status) {
1217		for (Conversation conversation : getConversations()) {
1218			if (conversation.getContactJid().equals(recipient)
1219					&& conversation.getAccount().equals(account)) {
1220				return markMessage(conversation, uuid, status);
1221			}
1222		}
1223		return false;
1224	}
1225
1226	public boolean markMessage(Conversation conversation, String uuid,
1227			int status) {
1228		for (Message message : conversation.getMessages()) {
1229			if (message.getUuid().equals(uuid)) {
1230				markMessage(message, status);
1231				return true;
1232			}
1233		}
1234		return false;
1235	}
1236
1237	public void markMessage(Message message, int status) {
1238		message.setStatus(status);
1239		databaseBackend.updateMessage(message);
1240		updateConversationUi();
1241	}
1242
1243	public SharedPreferences getPreferences() {
1244		return PreferenceManager
1245				.getDefaultSharedPreferences(getApplicationContext());
1246	}
1247
1248	public boolean confirmMessages() {
1249		return getPreferences().getBoolean("confirm_messages", true);
1250	}
1251
1252	public void notifyUi(Conversation conversation, boolean notify) {
1253		if (mOnConversationUpdate != null) {
1254			mOnConversationUpdate.onConversationUpdate();
1255		} else {
1256			UIHelper.updateNotification(getApplicationContext(),
1257					getConversations(), conversation, notify);
1258		}
1259	}
1260	
1261	public void updateConversationUi() {
1262		if (mOnConversationUpdate != null) {
1263			mOnConversationUpdate.onConversationUpdate();
1264		}
1265	}
1266	
1267	public void updateAccountUi() {
1268		if (mOnAccountUpdate != null) {
1269			mOnAccountUpdate.onAccountUpdate();
1270		}
1271	}
1272
1273	public Account findAccountByJid(String accountJid) {
1274		for (Account account : this.accounts) {
1275			if (account.getJid().equals(accountJid)) {
1276				return account;
1277			}
1278		}
1279		return null;
1280	}
1281
1282	public void markRead(Conversation conversation) {
1283		conversation.markRead();
1284		String id = conversation.popLatestMarkableMessageId();
1285		if (confirmMessages() && id != null) {
1286			Account account = conversation.getAccount();
1287			String to = conversation.getContactJid();
1288			this.sendMessagePacket(conversation.getAccount(), mMessageGenerator.confirm(account, to, id));
1289		}
1290	}
1291
1292	public SecureRandom getRNG() {
1293		return this.mRandom;
1294	}
1295
1296	public PowerManager getPowerManager() {
1297		return this.pm;
1298	}
1299
1300	public void replyWithNotAcceptable(Account account, MessagePacket packet) {
1301		if (account.getStatus() == Account.STATUS_ONLINE) {
1302			MessagePacket error = this.mMessageGenerator
1303					.generateNotAcceptable(packet);
1304			sendMessagePacket(account,error);
1305		}
1306	}
1307
1308	public void syncRosterToDisk(final Account account) {
1309		new Thread(new Runnable() {
1310
1311			@Override
1312			public void run() {
1313				databaseBackend.writeRoster(account.getRoster());
1314			}
1315		}).start();
1316
1317	}
1318
1319	public List<String> getKnownHosts() {
1320		List<String> hosts = new ArrayList<String>();
1321		for (Account account : getAccounts()) {
1322			if (!hosts.contains(account.getServer())) {
1323				hosts.add(account.getServer());
1324			}
1325			for (Contact contact : account.getRoster().getContacts()) {
1326				if (contact.showInRoster()) {
1327					String server = contact.getServer();
1328					if (server != null && !hosts.contains(server)) {
1329						hosts.add(server);
1330					}
1331				}
1332			}
1333		}
1334		return hosts;
1335	}
1336
1337	public List<String> getKnownConferenceHosts() {
1338		ArrayList<String> mucServers = new ArrayList<String>();
1339		for (Account account : accounts) {
1340			if (account.getXmppConnection() != null) {
1341				String server = account.getXmppConnection().getMucServer();
1342				if (server != null) {
1343					mucServers.add(server);
1344				}
1345			}
1346		}
1347		return mucServers;
1348	}
1349	
1350	public void sendMessagePacket(Account account, MessagePacket packet) {
1351		account.getXmppConnection().sendMessagePacket(packet);
1352	}
1353	
1354	public void sendPresencePacket(Account account, PresencePacket packet) {
1355		account.getXmppConnection().sendPresencePacket(packet);
1356	}
1357	
1358	public void sendIqPacket(Account account, IqPacket packet, OnIqPacketReceived callback) {
1359		account.getXmppConnection().sendIqPacket(packet, callback);
1360	}
1361	
1362	public MessageGenerator getMessageGenerator() {
1363		return this.mMessageGenerator;
1364	}
1365	
1366	public PresenceGenerator getPresenceGenerator() {
1367		return this.mPresenceGenerator;
1368	}
1369	
1370	public JingleConnectionManager getJingleConnectionManager() {
1371		return this.mJingleConnectionManager;
1372	}
1373	
1374	public interface OnConversationUpdate {
1375		public void onConversationUpdate();
1376	}
1377	
1378	public interface OnAccountUpdate {
1379		public void onAccountUpdate();
1380	}
1381	
1382	public interface OnRosterUpdate {
1383		public void onRosterUpdate();
1384	}
1385}