XmppConnectionService.java

   1package eu.siacs.conversations.services;
   2
   3import java.security.SecureRandom;
   4import java.text.SimpleDateFormat;
   5import java.util.ArrayList;
   6import java.util.Collections;
   7import java.util.Comparator;
   8import java.util.Date;
   9import java.util.Hashtable;
  10import java.util.List;
  11import java.util.Locale;
  12import java.util.TimeZone;
  13import java.util.concurrent.CopyOnWriteArrayList;
  14
  15import org.openintents.openpgp.util.OpenPgpApi;
  16import org.openintents.openpgp.util.OpenPgpServiceConnection;
  17
  18import de.duenndns.ssl.MemorizingTrustManager;
  19
  20import net.java.otr4j.OtrException;
  21import net.java.otr4j.session.Session;
  22import net.java.otr4j.session.SessionStatus;
  23import eu.siacs.conversations.crypto.PgpEngine;
  24import eu.siacs.conversations.entities.Account;
  25import eu.siacs.conversations.entities.Bookmark;
  26import eu.siacs.conversations.entities.Contact;
  27import eu.siacs.conversations.entities.Conversation;
  28import eu.siacs.conversations.entities.Message;
  29import eu.siacs.conversations.entities.MucOptions;
  30import eu.siacs.conversations.entities.MucOptions.OnRenameListener;
  31import eu.siacs.conversations.entities.Presences;
  32import eu.siacs.conversations.generator.IqGenerator;
  33import eu.siacs.conversations.generator.MessageGenerator;
  34import eu.siacs.conversations.generator.PresenceGenerator;
  35import eu.siacs.conversations.parser.IqParser;
  36import eu.siacs.conversations.parser.MessageParser;
  37import eu.siacs.conversations.parser.PresenceParser;
  38import eu.siacs.conversations.persistance.DatabaseBackend;
  39import eu.siacs.conversations.persistance.FileBackend;
  40import eu.siacs.conversations.ui.UiCallback;
  41import eu.siacs.conversations.utils.CryptoHelper;
  42import eu.siacs.conversations.utils.ExceptionHelper;
  43import eu.siacs.conversations.utils.OnPhoneContactsLoadedListener;
  44import eu.siacs.conversations.utils.PRNGFixes;
  45import eu.siacs.conversations.utils.PhoneHelper;
  46import eu.siacs.conversations.utils.UIHelper;
  47import eu.siacs.conversations.xml.Element;
  48import eu.siacs.conversations.xmpp.OnBindListener;
  49import eu.siacs.conversations.xmpp.OnContactStatusChanged;
  50import eu.siacs.conversations.xmpp.OnIqPacketReceived;
  51import eu.siacs.conversations.xmpp.OnStatusChanged;
  52import eu.siacs.conversations.xmpp.XmppConnection;
  53import eu.siacs.conversations.xmpp.jingle.JingleConnectionManager;
  54import eu.siacs.conversations.xmpp.jingle.OnJinglePacketReceived;
  55import eu.siacs.conversations.xmpp.jingle.stanzas.JinglePacket;
  56import eu.siacs.conversations.xmpp.stanzas.IqPacket;
  57import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
  58import eu.siacs.conversations.xmpp.stanzas.PresencePacket;
  59import android.annotation.SuppressLint;
  60import android.app.AlarmManager;
  61import android.app.PendingIntent;
  62import android.app.Service;
  63import android.content.Context;
  64import android.content.Intent;
  65import android.content.SharedPreferences;
  66import android.database.ContentObserver;
  67import android.net.ConnectivityManager;
  68import android.net.NetworkInfo;
  69import android.net.Uri;
  70import android.os.Binder;
  71import android.os.Bundle;
  72import android.os.IBinder;
  73import android.os.PowerManager;
  74import android.os.PowerManager.WakeLock;
  75import android.os.SystemClock;
  76import android.preference.PreferenceManager;
  77import android.provider.ContactsContract;
  78import android.util.Log;
  79
  80public class XmppConnectionService extends Service {
  81
  82	protected static final String LOGTAG = "xmppService";
  83	public DatabaseBackend databaseBackend;
  84	private FileBackend fileBackend;
  85
  86	public long startDate;
  87
  88	private static final int PING_MAX_INTERVAL = 300;
  89	private static final int PING_MIN_INTERVAL = 30;
  90	private static final int PING_TIMEOUT = 10;
  91	private static final int CONNECT_TIMEOUT = 90;
  92	public static final long CARBON_GRACE_PERIOD = 60000L;
  93
  94	private static String ACTION_MERGE_PHONE_CONTACTS = "merge_phone_contacts";
  95	
  96	private MemorizingTrustManager mMemorizingTrustManager;
  97
  98	private MessageParser mMessageParser = new MessageParser(this);
  99	private PresenceParser mPresenceParser = new PresenceParser(this);
 100	private IqParser mIqParser = new IqParser(this);
 101	private MessageGenerator mMessageGenerator = new MessageGenerator();
 102	private PresenceGenerator mPresenceGenerator = new PresenceGenerator();
 103	
 104	private List<Account> accounts;
 105	private CopyOnWriteArrayList<Conversation> conversations = null;
 106	private JingleConnectionManager mJingleConnectionManager = new JingleConnectionManager(
 107			this);
 108
 109	private OnConversationUpdate mOnConversationUpdate = null;
 110	private int convChangedListenerCount = 0;
 111	private OnAccountUpdate mOnAccountUpdate = null;
 112	private OnRosterUpdate mOnRosterUpdate = null;
 113	public OnContactStatusChanged onContactStatusChanged = new OnContactStatusChanged() {
 114
 115		@Override
 116		public void onContactStatusChanged(Contact contact, boolean online) {
 117			Conversation conversation = find(getConversations(),contact);
 118			if (conversation != null) {
 119				conversation.endOtrIfNeeded();
 120				if (online && (contact.getPresences().size() == 1)) {
 121					sendUnsendMessages(conversation);
 122				}
 123			}
 124		}
 125	};
 126
 127	private SecureRandom mRandom;
 128
 129	private ContentObserver contactObserver = new ContentObserver(null) {
 130		@Override
 131		public void onChange(boolean selfChange) {
 132			super.onChange(selfChange);
 133			Intent intent = new Intent(getApplicationContext(),
 134					XmppConnectionService.class);
 135			intent.setAction(ACTION_MERGE_PHONE_CONTACTS);
 136			startService(intent);
 137		}
 138	};
 139
 140	private final IBinder mBinder = new XmppConnectionBinder();
 141	private OnStatusChanged statusListener = new OnStatusChanged() {
 142
 143		@Override
 144		public void onStatusChanged(Account account) {
 145			if (mOnAccountUpdate != null) {
 146				mOnAccountUpdate.onAccountUpdate();;
 147			}
 148			if (account.getStatus() == Account.STATUS_ONLINE) {
 149				for(Conversation conversation : account.pendingConferenceLeaves) {
 150					leaveMuc(conversation);
 151				}
 152				for(Conversation conversation : account.pendingConferenceJoins) {
 153					joinMuc(conversation);
 154				}
 155				mJingleConnectionManager.cancelInTransmission();
 156				List<Conversation> conversations = getConversations();
 157				for (int i = 0; i < conversations.size(); ++i) {
 158					if (conversations.get(i).getAccount() == account) {
 159						conversations.get(i).startOtrIfNeeded();
 160						sendUnsendMessages(conversations.get(i));
 161					}
 162				}
 163				syncDirtyContacts(account);
 164				scheduleWakeupCall(PING_MAX_INTERVAL, true);
 165			} else if (account.getStatus() == Account.STATUS_OFFLINE) {
 166				if (!account.isOptionSet(Account.OPTION_DISABLED)) {
 167					int timeToReconnect = mRandom.nextInt(50) + 10;
 168					scheduleWakeupCall(timeToReconnect, false);
 169				}
 170
 171			} else if (account.getStatus() == Account.STATUS_REGISTRATION_SUCCESSFULL) {
 172				databaseBackend.updateAccount(account);
 173				reconnectAccount(account, true);
 174			} else if ((account.getStatus() != Account.STATUS_CONNECTING)
 175					&& (account.getStatus() != Account.STATUS_NO_INTERNET)) {
 176				int next = account.getXmppConnection().getTimeToNextAttempt();
 177				Log.d(LOGTAG, account.getJid()
 178						+ ": error connecting account. try again in " + next
 179						+ "s for the "
 180						+ (account.getXmppConnection().getAttempt() + 1)
 181						+ " time");
 182				scheduleWakeupCall(next, false);
 183			}
 184			UIHelper.showErrorNotification(getApplicationContext(),
 185					getAccounts());
 186		}
 187	};
 188
 189	private OnJinglePacketReceived jingleListener = new OnJinglePacketReceived() {
 190
 191		@Override
 192		public void onJinglePacketReceived(Account account, JinglePacket packet) {
 193			mJingleConnectionManager.deliverPacket(account, packet);
 194		}
 195	};
 196
 197	private OpenPgpServiceConnection pgpServiceConnection;
 198	private PgpEngine mPgpEngine = null;
 199	private Intent pingIntent;
 200	private PendingIntent pendingPingIntent = null;
 201	private WakeLock wakeLock;
 202	private PowerManager pm;
 203	private OnBindListener mOnBindListener = new OnBindListener() {
 204
 205			@Override
 206			public void onBind(final Account account) {
 207				account.getRoster().clearPresences();
 208				account.clearPresences(); // self presences
 209				account.pendingConferenceJoins.clear();
 210				account.pendingConferenceLeaves.clear();
 211				fetchRosterFromServer(account);
 212				fetchBookmarks(account);
 213				sendPresencePacket(account, mPresenceGenerator.sendPresence(account));
 214				connectMultiModeConversations(account);
 215				updateConversationUi();
 216			}
 217		};
 218
 219	public PgpEngine getPgpEngine() {
 220		if (pgpServiceConnection.isBound()) {
 221			if (this.mPgpEngine == null) {
 222				this.mPgpEngine = new PgpEngine(new OpenPgpApi(
 223						getApplicationContext(),
 224						pgpServiceConnection.getService()), this);
 225			}
 226			return mPgpEngine;
 227		} else {
 228			return null;
 229		}
 230
 231	}
 232
 233	public FileBackend getFileBackend() {
 234		return this.fileBackend;
 235	}
 236
 237	public Message attachImageToConversation(final Conversation conversation,
 238			final Uri uri, final UiCallback<Message> callback) {
 239		final Message message;
 240		if (conversation.getNextEncryption() == Message.ENCRYPTION_PGP) {
 241			message = new Message(conversation, "",
 242					Message.ENCRYPTION_DECRYPTED);
 243		} else {
 244			message = new Message(conversation, "",
 245					conversation.getNextEncryption());
 246		}
 247		message.setPresence(conversation.getNextPresence());
 248		message.setType(Message.TYPE_IMAGE);
 249		message.setStatus(Message.STATUS_OFFERED);
 250		new Thread(new Runnable() {
 251
 252			@Override
 253			public void run() {
 254				try {
 255					getFileBackend().copyImageToPrivateStorage(message, uri);
 256					if (conversation.getNextEncryption() == Message.ENCRYPTION_PGP) {
 257						getPgpEngine().encrypt(message, callback);
 258					} else {
 259						callback.success(message);
 260					}
 261				} catch (FileBackend.ImageCopyException e) {
 262					callback.error(e.getResId(), message);
 263				}
 264			}
 265		}).start();
 266		return message;
 267	}
 268
 269	public Conversation find(Bookmark bookmark) {
 270		return find(bookmark.getAccount(),bookmark.getJid());
 271	}
 272	
 273	public Conversation find(Account account, String jid) {
 274		return find(getConversations(),account,jid);
 275	}
 276
 277	public class XmppConnectionBinder extends Binder {
 278		public XmppConnectionService getService() {
 279			return XmppConnectionService.this;
 280		}
 281	}
 282
 283	@Override
 284	public int onStartCommand(Intent intent, int flags, int startId) {
 285		if ((intent != null)
 286				&& (ACTION_MERGE_PHONE_CONTACTS.equals(intent.getAction()))) {
 287			mergePhoneContactsWithRoster();
 288			return START_STICKY;
 289		} else if ((intent != null)
 290				&& (Intent.ACTION_SHUTDOWN.equals(intent.getAction()))) {
 291			logoutAndSave();
 292			return START_NOT_STICKY;
 293		}
 294		this.wakeLock.acquire();
 295		ConnectivityManager cm = (ConnectivityManager) getApplicationContext()
 296				.getSystemService(Context.CONNECTIVITY_SERVICE);
 297		NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
 298		boolean isConnected = activeNetwork != null
 299				&& activeNetwork.isConnected();
 300
 301		for (Account account : accounts) {
 302			if (!account.isOptionSet(Account.OPTION_DISABLED)) {
 303				if (!isConnected) {
 304					account.setStatus(Account.STATUS_NO_INTERNET);
 305					if (statusListener != null) {
 306						statusListener.onStatusChanged(account);
 307					}
 308				} else {
 309					if (account.getStatus() == Account.STATUS_NO_INTERNET) {
 310						account.setStatus(Account.STATUS_OFFLINE);
 311						if (statusListener != null) {
 312							statusListener.onStatusChanged(account);
 313						}
 314					}
 315					if (account.getStatus() == Account.STATUS_ONLINE) {
 316						long lastReceived = account.getXmppConnection().lastPaketReceived;
 317						long lastSent = account.getXmppConnection().lastPingSent;
 318						if (lastSent - lastReceived >= PING_TIMEOUT * 1000) {
 319							Log.d(LOGTAG, account.getJid() + ": ping timeout");
 320							this.reconnectAccount(account, true);
 321						} else if (SystemClock.elapsedRealtime() - lastReceived >= PING_MIN_INTERVAL * 1000) {
 322							account.getXmppConnection().sendPing();
 323							account.getXmppConnection().lastPingSent = SystemClock
 324									.elapsedRealtime();
 325							this.scheduleWakeupCall(2, false);
 326						}
 327					} else if (account.getStatus() == Account.STATUS_OFFLINE) {
 328						if (account.getXmppConnection() == null) {
 329							account.setXmppConnection(this
 330									.createConnection(account));
 331						}
 332						account.getXmppConnection().lastPingSent = SystemClock
 333								.elapsedRealtime();
 334						new Thread(account.getXmppConnection()).start();
 335					} else if ((account.getStatus() == Account.STATUS_CONNECTING)
 336							&& ((SystemClock.elapsedRealtime() - account
 337									.getXmppConnection().lastConnect) / 1000 >= CONNECT_TIMEOUT)) {
 338						Log.d(LOGTAG, account.getJid()
 339								+ ": time out during connect reconnecting");
 340						reconnectAccount(account, true);
 341					} else {
 342						if (account.getXmppConnection().getTimeToNextAttempt() <= 0) {
 343							reconnectAccount(account, true);
 344						}
 345					}
 346					// in any case. reschedule wakup call
 347					this.scheduleWakeupCall(PING_MAX_INTERVAL, true);
 348				}
 349				if (mOnAccountUpdate != null) {
 350					mOnAccountUpdate.onAccountUpdate();
 351				}
 352			}
 353		}
 354		if (wakeLock.isHeld()) {
 355			try {
 356				wakeLock.release();
 357			} catch (RuntimeException re) {
 358			}
 359		}
 360		return START_STICKY;
 361	}
 362
 363	@SuppressLint("TrulyRandom")
 364	@Override
 365	public void onCreate() {
 366		ExceptionHelper.init(getApplicationContext());
 367		PRNGFixes.apply();
 368		this.mRandom = new SecureRandom();
 369		this.mMemorizingTrustManager = new MemorizingTrustManager(getApplicationContext());
 370		this.databaseBackend = DatabaseBackend
 371				.getInstance(getApplicationContext());
 372		this.fileBackend = new FileBackend(getApplicationContext());
 373		this.accounts = databaseBackend.getAccounts();
 374
 375		for (Account account : this.accounts) {
 376			this.databaseBackend.readRoster(account.getRoster());
 377		}
 378		this.mergePhoneContactsWithRoster();
 379		this.getConversations();
 380
 381		getContentResolver().registerContentObserver(
 382				ContactsContract.Contacts.CONTENT_URI, true, contactObserver);
 383		this.pgpServiceConnection = new OpenPgpServiceConnection(
 384				getApplicationContext(), "org.sufficientlysecure.keychain");
 385		this.pgpServiceConnection.bindToService();
 386
 387		this.pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
 388		this.wakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK,
 389				"XmppConnectionService");
 390	}
 391
 392	@Override
 393	public void onDestroy() {
 394		super.onDestroy();
 395		this.logoutAndSave();
 396	}
 397
 398	@Override
 399	public void onTaskRemoved(Intent rootIntent) {
 400		super.onTaskRemoved(rootIntent);
 401		this.logoutAndSave();
 402	}
 403
 404	private void logoutAndSave() {
 405		for (Account account : accounts) {
 406			databaseBackend.writeRoster(account.getRoster());
 407			if (account.getXmppConnection() != null) {
 408				disconnect(account, false);
 409			}
 410		}
 411		Context context = getApplicationContext();
 412		AlarmManager alarmManager = (AlarmManager) context
 413				.getSystemService(Context.ALARM_SERVICE);
 414		Intent intent = new Intent(context, EventReceiver.class);
 415		alarmManager.cancel(PendingIntent.getBroadcast(context, 0, intent, 0));
 416		Log.d(LOGTAG, "good bye");
 417		stopSelf();
 418	}
 419
 420	protected void scheduleWakeupCall(int seconds, boolean ping) {
 421		long timeToWake = SystemClock.elapsedRealtime() + seconds * 1000;
 422		Context context = getApplicationContext();
 423		AlarmManager alarmManager = (AlarmManager) context
 424				.getSystemService(Context.ALARM_SERVICE);
 425
 426		if (ping) {
 427			if (this.pingIntent == null) {
 428				this.pingIntent = new Intent(context, EventReceiver.class);
 429				this.pingIntent.setAction("ping");
 430				this.pingIntent.putExtra("time", timeToWake);
 431				this.pendingPingIntent = PendingIntent.getBroadcast(context, 0,
 432						this.pingIntent, 0);
 433				alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP,
 434						timeToWake, pendingPingIntent);
 435			} else {
 436				long scheduledTime = this.pingIntent.getLongExtra("time", 0);
 437				if (scheduledTime < SystemClock.elapsedRealtime()
 438						|| (scheduledTime > timeToWake)) {
 439					this.pingIntent.putExtra("time", timeToWake);
 440					alarmManager.cancel(this.pendingPingIntent);
 441					this.pendingPingIntent = PendingIntent.getBroadcast(
 442							context, 0, this.pingIntent, 0);
 443					alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP,
 444							timeToWake, pendingPingIntent);
 445				}
 446			}
 447		} else {
 448			Intent intent = new Intent(context, EventReceiver.class);
 449			intent.setAction("ping_check");
 450			PendingIntent alarmIntent = PendingIntent.getBroadcast(context, 0,
 451					intent, 0);
 452			alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP, timeToWake,
 453					alarmIntent);
 454		}
 455
 456	}
 457
 458	public XmppConnection createConnection(Account account) {
 459		SharedPreferences sharedPref = getPreferences();
 460		account.setResource(sharedPref.getString("resource", "mobile")
 461				.toLowerCase(Locale.getDefault()));
 462		XmppConnection connection = new XmppConnection(account, this);
 463		connection.setOnMessagePacketReceivedListener(this.mMessageParser);
 464		connection.setOnStatusChangedListener(this.statusListener);
 465		connection.setOnPresencePacketReceivedListener(this.mPresenceParser);
 466		connection
 467				.setOnUnregisteredIqPacketReceivedListener(this.mIqParser);
 468		connection.setOnJinglePacketReceivedListener(this.jingleListener);
 469		connection.setOnBindListener(this.mOnBindListener);
 470		return connection;
 471	}
 472
 473	synchronized public void sendMessage(Message message) {
 474		Account account = message.getConversation().getAccount();
 475		Conversation conv = message.getConversation();
 476		MessagePacket packet = null;
 477		boolean saveInDb = true;
 478		boolean send = false;
 479		if (account.getStatus() == Account.STATUS_ONLINE) {
 480			if (message.getType() == Message.TYPE_IMAGE) {
 481				if (message.getPresence() != null) {
 482					if (message.getEncryption() == Message.ENCRYPTION_OTR) {
 483						if (!conv.hasValidOtrSession()
 484								&& (message.getPresence() != null)) {
 485							conv.startOtrSession(getApplicationContext(),
 486									message.getPresence(), true);
 487							message.setStatus(Message.STATUS_WAITING);
 488						} else if (conv.hasValidOtrSession()
 489								&& conv.getOtrSession().getSessionStatus() == SessionStatus.ENCRYPTED) {
 490							mJingleConnectionManager
 491									.createNewConnection(message);
 492						} else if (message.getPresence() == null) {
 493							message.setStatus(Message.STATUS_WAITING);
 494						}
 495					} else {
 496						mJingleConnectionManager.createNewConnection(message);
 497					}
 498				} else {
 499					message.setStatus(Message.STATUS_WAITING);
 500				}
 501			} else {
 502				if (message.getEncryption() == Message.ENCRYPTION_OTR) {
 503					if (!conv.hasValidOtrSession()
 504							&& (message.getPresence() != null)) {
 505						conv.startOtrSession(getApplicationContext(),
 506								message.getPresence(), true);
 507						message.setStatus(Message.STATUS_WAITING);
 508					} else if (conv.hasValidOtrSession()
 509							&& conv.getOtrSession().getSessionStatus() == SessionStatus.ENCRYPTED) {
 510						message.setPresence(conv.getOtrSession().getSessionID()
 511								.getUserID());
 512						packet = mMessageGenerator.generateOtrChat(message);
 513						send = true;
 514						message.setStatus(Message.STATUS_SEND);
 515						
 516					} else if (message.getPresence() == null) {
 517						message.setStatus(Message.STATUS_WAITING);
 518					}
 519				} else if (message.getEncryption() == Message.ENCRYPTION_DECRYPTED) {
 520					message.getConversation().endOtrIfNeeded();
 521					failWaitingOtrMessages(message.getConversation());
 522					packet = mMessageGenerator.generatePgpChat(message);
 523					message.setStatus(Message.STATUS_SEND);
 524					send = true;
 525				} else {
 526					message.getConversation().endOtrIfNeeded();
 527					failWaitingOtrMessages(message.getConversation());
 528					if (message.getConversation().getMode() == Conversation.MODE_SINGLE) {
 529						message.setStatus(Message.STATUS_SEND);
 530					}
 531					packet = mMessageGenerator.generateChat(message);
 532					send = true;
 533				}
 534			}
 535		} else {
 536			message.setStatus(Message.STATUS_WAITING);
 537			if (message.getType() == Message.TYPE_TEXT) {
 538				if (message.getEncryption() == Message.ENCRYPTION_DECRYPTED) {
 539					String pgpBody = message.getEncryptedBody();
 540					String decryptedBody = message.getBody();
 541					message.setBody(pgpBody);
 542					databaseBackend.createMessage(message);
 543					saveInDb = false;
 544					message.setBody(decryptedBody);
 545				} else if (message.getEncryption() == Message.ENCRYPTION_OTR) {
 546					if (conv.hasValidOtrSession()) {
 547						message.setPresence(conv.getOtrSession().getSessionID()
 548								.getUserID());
 549					} else if (!conv.hasValidOtrSession()
 550							&& message.getPresence() != null) {
 551						conv.startOtrSession(getApplicationContext(),
 552								message.getPresence(), false);
 553					}
 554				}
 555			}
 556
 557		}
 558		if (saveInDb) {
 559			databaseBackend.createMessage(message);
 560		}
 561		conv.getMessages().add(message);
 562		updateConversationUi();
 563		if ((send) && (packet != null)) {
 564			sendMessagePacket(account, packet);
 565		}
 566
 567	}
 568
 569	private void sendUnsendMessages(Conversation conversation) {
 570		for (int i = 0; i < conversation.getMessages().size(); ++i) {
 571			int status = conversation.getMessages().get(i).getStatus();
 572			if (status == Message.STATUS_WAITING) {
 573				resendMessage(conversation.getMessages().get(i));
 574			}
 575		}
 576	}
 577
 578	private void resendMessage(Message message) {
 579		Account account = message.getConversation().getAccount();
 580		MessagePacket packet = null;
 581		if (message.getEncryption() == Message.ENCRYPTION_OTR) {
 582			Presences presences = message.getConversation().getContact()
 583					.getPresences();
 584			if (!message.getConversation().hasValidOtrSession()) {
 585				if ((message.getPresence() != null)
 586						&& (presences.has(message.getPresence()))) {
 587					message.getConversation().startOtrSession(
 588							getApplicationContext(), message.getPresence(),
 589							true);
 590				} else {
 591					if (presences.size() == 1) {
 592						String presence = presences.asStringArray()[0];
 593						message.getConversation().startOtrSession(
 594								getApplicationContext(), presence, true);
 595					}
 596				}
 597			} else {
 598				if (message.getConversation().getOtrSession()
 599						.getSessionStatus() == SessionStatus.ENCRYPTED) {
 600					if (message.getType() == Message.TYPE_TEXT) {
 601						packet = mMessageGenerator.generateOtrChat(message,
 602								true);
 603					} else if (message.getType() == Message.TYPE_IMAGE) {
 604						mJingleConnectionManager.createNewConnection(message);
 605					}
 606				}
 607			}
 608		} else if (message.getType() == Message.TYPE_TEXT) {
 609			if (message.getEncryption() == Message.ENCRYPTION_NONE) {
 610				packet = mMessageGenerator.generateChat(message, true);
 611			} else if ((message.getEncryption() == Message.ENCRYPTION_DECRYPTED)
 612					|| (message.getEncryption() == Message.ENCRYPTION_PGP)) {
 613				packet = mMessageGenerator.generatePgpChat(message, true);
 614			}
 615		} else if (message.getType() == Message.TYPE_IMAGE) {
 616			Presences presences = message.getConversation().getContact()
 617					.getPresences();
 618			if ((message.getPresence() != null)
 619					&& (presences.has(message.getPresence()))) {
 620				markMessage(message, Message.STATUS_OFFERED);
 621				mJingleConnectionManager.createNewConnection(message);
 622			} else {
 623				if (presences.size() == 1) {
 624					String presence = presences.asStringArray()[0];
 625					message.setPresence(presence);
 626					markMessage(message, Message.STATUS_OFFERED);
 627					mJingleConnectionManager.createNewConnection(message);
 628				}
 629			}
 630		}
 631		if (packet != null) {
 632			sendMessagePacket(account,packet);
 633			markMessage(message, Message.STATUS_SEND);
 634		}
 635	}
 636
 637	public void fetchRosterFromServer(Account account) {
 638		IqPacket iqPacket = new IqPacket(IqPacket.TYPE_GET);
 639		if (!"".equals(account.getRosterVersion())) {
 640			Log.d(LOGTAG, account.getJid() + ": fetching roster version "
 641					+ account.getRosterVersion());
 642		} else {
 643			Log.d(LOGTAG, account.getJid() + ": fetching roster");
 644		}
 645		iqPacket.query("jabber:iq:roster").setAttribute("ver",
 646				account.getRosterVersion());
 647		account.getXmppConnection().sendIqPacket(iqPacket,
 648				new OnIqPacketReceived() {
 649
 650					@Override
 651					public void onIqPacketReceived(final Account account,
 652							IqPacket packet) {
 653						Element query = packet.findChild("query");
 654						if (query != null) {
 655							account.getRoster().markAllAsNotInRoster();
 656							mIqParser.rosterItems(account, query);
 657						}
 658					}
 659				});
 660	}
 661	
 662	public void fetchBookmarks(Account account) {
 663		IqPacket iqPacket = new IqPacket(IqPacket.TYPE_GET);
 664		Element query = iqPacket.query("jabber:iq:private");
 665		query.addChild("storage", "storage:bookmarks");
 666		OnIqPacketReceived callback = new OnIqPacketReceived() {
 667			
 668			@Override
 669			public void onIqPacketReceived(Account account, IqPacket packet) {
 670				Element query = packet.query();
 671				List<Bookmark> bookmarks = new ArrayList<Bookmark>();
 672				Element storage = query.findChild("storage", "storage:bookmarks");
 673				if (storage!=null) {
 674					for(Element item : storage.getChildren()) {
 675						if (item.getName().equals("conference")) {
 676							Bookmark bookmark = Bookmark.parse(item,account);
 677							bookmarks.add(bookmark);
 678							Conversation conversation = find(bookmark);
 679							if (conversation!=null) {
 680								conversation.setBookmark(bookmark);
 681							} else {
 682								if (bookmark.autojoin()) {
 683									conversation = findOrCreateConversation(account, bookmark.getJid(), true);
 684									conversation.setBookmark(bookmark);
 685									joinMuc(conversation);
 686								}
 687							}
 688						}
 689					}
 690				}
 691				account.setBookmarks(bookmarks);
 692			}
 693		};
 694		sendIqPacket(account, iqPacket, callback);
 695		
 696	}
 697	
 698	public void pushBookmarks(Account account) {
 699		IqPacket iqPacket = new IqPacket(IqPacket.TYPE_SET);
 700		Element query = iqPacket.query("jabber:iq:private");
 701		Element storage = query.addChild("storage", "storage:bookmarks");
 702		for(Bookmark bookmark : account.getBookmarks()) {
 703			storage.addChild(bookmark.toElement());
 704		}
 705		sendIqPacket(account, iqPacket,null);
 706	}
 707
 708	private void mergePhoneContactsWithRoster() {
 709		PhoneHelper.loadPhoneContacts(getApplicationContext(),
 710				new OnPhoneContactsLoadedListener() {
 711					@Override
 712					public void onPhoneContactsLoaded(List<Bundle> phoneContacts) {
 713						for (Account account : accounts) {
 714							account.getRoster().clearSystemAccounts();
 715						}
 716						for (Bundle phoneContact : phoneContacts) {
 717							for (Account account : accounts) {
 718								String jid = phoneContact.getString("jid");
 719								Contact contact = account.getRoster()
 720										.getContact(jid);
 721								String systemAccount = phoneContact
 722										.getInt("phoneid")
 723										+ "#"
 724										+ phoneContact.getString("lookup");
 725								contact.setSystemAccount(systemAccount);
 726								contact.setPhotoUri(phoneContact
 727										.getString("photouri"));
 728								contact.setSystemName(phoneContact
 729										.getString("displayname"));
 730							}
 731						}
 732					}
 733				});
 734	}
 735
 736	public List<Conversation> getConversations() {
 737		if (this.conversations == null) {
 738			Hashtable<String, Account> accountLookupTable = new Hashtable<String, Account>();
 739			for (Account account : this.accounts) {
 740				accountLookupTable.put(account.getUuid(), account);
 741			}
 742			this.conversations = databaseBackend
 743					.getConversations(Conversation.STATUS_AVAILABLE);
 744			for (Conversation conv : this.conversations) {
 745				Account account = accountLookupTable.get(conv.getAccountUuid());
 746				conv.setAccount(account);
 747				conv.setMessages(databaseBackend.getMessages(conv, 50));
 748			}
 749		}
 750		
 751		return this.conversations;
 752	}
 753	
 754	public void populateWithOrderedConversations(List<Conversation> list) {
 755		list.clear();
 756		list.addAll(getConversations());
 757		Collections.sort(list, new Comparator<Conversation>() {
 758			@Override
 759			public int compare(Conversation lhs, Conversation rhs) {
 760				Message left = lhs.getLatestMessage();
 761				Message right = rhs.getLatestMessage();
 762				if (left.getTimeSent() > right.getTimeSent()) {
 763					return -1;
 764				} else if (left.getTimeSent() < right.getTimeSent()) {
 765					return 1;
 766				} else {
 767					return 0;
 768				}
 769			}
 770		});
 771	}
 772
 773	public List<Message> getMoreMessages(Conversation conversation,
 774			long timestamp) {
 775		List<Message> messages = databaseBackend.getMessages(conversation, 50,
 776				timestamp);
 777		for (Message message : messages) {
 778			message.setConversation(conversation);
 779		}
 780		return messages;
 781	}
 782
 783	public List<Account> getAccounts() {
 784		return this.accounts;
 785	}
 786
 787	public Conversation find(List<Conversation> haystack, Contact contact) {
 788		for (Conversation conversation : haystack) {
 789			if (conversation.getContact() == contact) {
 790				return conversation;
 791			}
 792		}
 793		return null;
 794	}
 795
 796	public Conversation find(List<Conversation> haystack, Account account, String jid) {
 797		for (Conversation conversation : haystack) {
 798			if ((conversation.getAccount().equals(account))
 799					&& (conversation.getContactJid().split("/")[0].equals(jid))) {
 800				return conversation;
 801			}
 802		}
 803		return null;
 804	}
 805	
 806	
 807	public Conversation findOrCreateConversation(Account account, String jid,
 808			boolean muc) {
 809		Conversation conversation = find(account, jid);
 810		if (conversation != null) {
 811			return conversation;
 812		}
 813		conversation = databaseBackend.findConversation(account,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		updateConversationUi();
 844		return conversation;
 845	}
 846
 847	public void archiveConversation(Conversation conversation) {
 848		if (conversation.getMode() == Conversation.MODE_MULTI) {
 849			Bookmark bookmark = conversation.getBookmark();
 850			if (bookmark!=null && bookmark.autojoin()) {
 851				bookmark.setAutojoin(false);
 852				pushBookmarks(bookmark.getAccount());
 853			}
 854			leaveMuc(conversation);
 855		} else {
 856			conversation.endOtrIfNeeded();
 857		}
 858		this.databaseBackend.updateConversation(conversation);
 859		this.conversations.remove(conversation);
 860		updateConversationUi();
 861	}
 862
 863	public void clearConversationHistory(Conversation conversation) {
 864		this.databaseBackend.deleteMessagesInConversation(conversation);
 865		this.fileBackend.removeFiles(conversation);
 866		conversation.getMessages().clear();
 867		updateConversationUi();
 868	}
 869
 870	public int getConversationCount() {
 871		return this.databaseBackend.getConversationCount();
 872	}
 873
 874	public void createAccount(Account account) {
 875		databaseBackend.createAccount(account);
 876		this.accounts.add(account);
 877		this.reconnectAccount(account, false);
 878		updateAccountUi();
 879	}
 880
 881	public void updateAccount(Account account) {
 882		this.statusListener.onStatusChanged(account);
 883		databaseBackend.updateAccount(account);
 884		reconnectAccount(account, false);
 885		updateAccountUi();
 886		UIHelper.showErrorNotification(getApplicationContext(), getAccounts());
 887	}
 888
 889	public void deleteAccount(Account account) {
 890		for(Conversation conversation : conversations) {
 891			if (conversation.getAccount() == account) {
 892				if (conversation.getMode() == Conversation.MODE_MULTI) {
 893					leaveMuc(conversation);
 894				} else if (conversation.getMode() == Conversation.MODE_SINGLE) {
 895					conversation.endOtrIfNeeded();
 896				}
 897				conversations.remove(conversation);
 898			}
 899		}
 900		if (account.getXmppConnection() != null) {
 901			this.disconnect(account, true);
 902		}
 903		databaseBackend.deleteAccount(account);
 904		this.accounts.remove(account);
 905		updateAccountUi();
 906		UIHelper.showErrorNotification(getApplicationContext(), getAccounts());
 907	}
 908
 909	public void setOnConversationListChangedListener(
 910			OnConversationUpdate listener) {
 911		this.mOnConversationUpdate = listener;
 912		this.convChangedListenerCount++;
 913	}
 914
 915	public void removeOnConversationListChangedListener() {
 916		this.convChangedListenerCount--;
 917		if (this.convChangedListenerCount == 0) {
 918			this.mOnConversationUpdate = null;
 919		}
 920	}
 921
 922	public void setOnAccountListChangedListener(OnAccountUpdate listener) {
 923		this.mOnAccountUpdate = listener;
 924	}
 925
 926	public void removeOnAccountListChangedListener() {
 927		this.mOnAccountUpdate = null;
 928	}
 929	
 930	public void setOnRosterUpdateListener(OnRosterUpdate listener) {
 931		this.mOnRosterUpdate = listener;
 932	}
 933
 934	public void removeOnRosterUpdateListener() {
 935		this.mOnRosterUpdate = null;
 936	}
 937
 938	public void connectMultiModeConversations(Account account) {
 939		List<Conversation> conversations = getConversations();
 940		for (int i = 0; i < conversations.size(); i++) {
 941			Conversation conversation = conversations.get(i);
 942			if ((conversation.getMode() == Conversation.MODE_MULTI)
 943					&& (conversation.getAccount() == account)) {
 944				joinMuc(conversation);
 945			}
 946		}
 947	}
 948
 949	public void joinMuc(Conversation conversation) {
 950		Account account = conversation.getAccount();
 951		account.pendingConferenceJoins.remove(conversation);
 952		account.pendingConferenceLeaves.remove(conversation);
 953		if (account.getStatus() == Account.STATUS_ONLINE) {
 954			Log.d(LOGTAG,"joining conversation "+conversation.getContactJid());
 955			String nick = conversation.getMucOptions().getProposedNick();
 956			conversation.getMucOptions().setJoinNick(nick);
 957			PresencePacket packet = new PresencePacket();
 958			String joinJid = conversation.getMucOptions().getJoinJid();
 959			packet.setAttribute("to",conversation.getMucOptions().getJoinJid());
 960			Element x = new Element("x");
 961			x.setAttribute("xmlns", "http://jabber.org/protocol/muc");
 962			String sig = account.getPgpSignature();
 963			if (sig != null) {
 964				packet.addChild("status").setContent("online");
 965				packet.addChild("x", "jabber:x:signed").setContent(sig);
 966			}
 967			if (conversation.getMessages().size() != 0) {
 968				final SimpleDateFormat mDateFormat = new SimpleDateFormat(
 969						"yyyy-MM-dd'T'HH:mm:ss.SSS'Z'", Locale.US);
 970				mDateFormat.setTimeZone(TimeZone.getTimeZone("UTC"));
 971				Date date = new Date(
 972						conversation.getLatestMessage().getTimeSent() + 1000);
 973				x.addChild("history").setAttribute("since",
 974						mDateFormat.format(date));
 975			}
 976			packet.addChild(x);
 977			sendPresencePacket(account, packet);
 978			if (!joinJid.equals(conversation.getContactJid())) {
 979				conversation.setContactJid(joinJid);
 980				databaseBackend.updateConversation(conversation);
 981			}
 982		} else {
 983			account.pendingConferenceJoins.add(conversation);
 984		}
 985	}
 986
 987	private OnRenameListener renameListener = null;
 988	private IqGenerator mIqGenerator = new IqGenerator();
 989
 990	public void setOnRenameListener(OnRenameListener listener) {
 991		this.renameListener = listener;
 992	}
 993
 994	public void renameInMuc(final Conversation conversation, final String nick) {
 995		final MucOptions options = conversation.getMucOptions();
 996		options.setJoinNick(nick);
 997		if (options.online()) {
 998			Account account = conversation.getAccount();
 999			options.setOnRenameListener(new OnRenameListener() {
1000
1001				@Override
1002				public void onRename(boolean success) {
1003					if (renameListener != null) {
1004						renameListener.onRename(success);
1005					}
1006					if (success) {
1007						conversation.setContactJid(conversation.getMucOptions().getJoinJid());
1008						databaseBackend.updateConversation(conversation);
1009						Bookmark bookmark = conversation.getBookmark();
1010						if (bookmark!=null) {
1011							bookmark.setNick(nick);
1012							pushBookmarks(bookmark.getAccount());
1013						}
1014					}
1015				}
1016			});
1017			options.flagAboutToRename();
1018			PresencePacket packet = new PresencePacket();
1019			packet.setAttribute("to",options.getJoinJid());
1020			packet.setAttribute("from", conversation.getAccount().getFullJid());
1021
1022			String sig = account.getPgpSignature();
1023			if (sig != null) {
1024				packet.addChild("status").setContent("online");
1025				packet.addChild("x", "jabber:x:signed").setContent(sig);
1026			}
1027			sendPresencePacket(account,packet);
1028		} else {
1029			conversation.setContactJid(options.getJoinJid());
1030			databaseBackend.updateConversation(conversation);
1031			if (conversation.getAccount().getStatus() == Account.STATUS_ONLINE) {
1032				Bookmark bookmark = conversation.getBookmark();
1033				if (bookmark!=null) {
1034					bookmark.setNick(nick);
1035					pushBookmarks(bookmark.getAccount());
1036				}
1037				joinMuc(conversation);
1038			}
1039		}
1040	}
1041
1042	public void leaveMuc(Conversation conversation) {
1043		Account account = conversation.getAccount();
1044		account.pendingConferenceJoins.remove(conversation);
1045		account.pendingConferenceLeaves.remove(conversation);
1046		if (account.getStatus() == Account.STATUS_ONLINE) {
1047			PresencePacket packet = new PresencePacket();
1048			packet.setAttribute("to", conversation.getMucOptions().getJoinJid());
1049			packet.setAttribute("from", conversation.getAccount().getFullJid());
1050			packet.setAttribute("type", "unavailable");
1051			sendPresencePacket(conversation.getAccount(),packet);
1052			conversation.getMucOptions().setOffline();
1053			conversation.deregisterWithBookmark();
1054			Log.d(LOGTAG,conversation.getAccount().getJid()+" leaving muc "+conversation.getContactJid());
1055		} else {
1056			account.pendingConferenceLeaves.add(conversation);
1057		}
1058	}
1059
1060	public void disconnect(Account account, boolean force) {
1061		if ((account.getStatus() == Account.STATUS_ONLINE)
1062				|| (account.getStatus() == Account.STATUS_DISABLED)) {
1063			if (!force) {
1064				List<Conversation> conversations = getConversations();
1065				for (int i = 0; i < conversations.size(); i++) {
1066					Conversation conversation = conversations.get(i);
1067					if (conversation.getAccount() == account) {
1068						if (conversation.getMode() == Conversation.MODE_MULTI) {
1069							leaveMuc(conversation);
1070						} else {
1071							conversation.endOtrIfNeeded();
1072						}
1073					}
1074				}
1075			}
1076			account.getXmppConnection().disconnect(force);
1077		}
1078	}
1079
1080	@Override
1081	public IBinder onBind(Intent intent) {
1082		return mBinder;
1083	}
1084
1085	public void updateMessage(Message message) {
1086		databaseBackend.updateMessage(message);
1087	}
1088
1089	protected void syncDirtyContacts(Account account) {
1090		for (Contact contact : account.getRoster().getContacts()) {
1091			if (contact.getOption(Contact.Options.DIRTY_PUSH)) {
1092				pushContactToServer(contact);
1093			}
1094			if (contact.getOption(Contact.Options.DIRTY_DELETE)) {
1095				Log.d(LOGTAG, "dirty delete");
1096				deleteContactOnServer(contact);
1097			}
1098		}
1099	}
1100
1101	public void createContact(Contact contact) {
1102		SharedPreferences sharedPref = getPreferences();
1103		boolean autoGrant = sharedPref.getBoolean("grant_new_contacts", true);
1104		if (autoGrant) {
1105			contact.setOption(Contact.Options.PREEMPTIVE_GRANT);
1106			contact.setOption(Contact.Options.ASKING);
1107		}
1108		pushContactToServer(contact);
1109	}
1110
1111	public void onOtrSessionEstablished(Conversation conversation) {
1112		Account account = conversation.getAccount();
1113		List<Message> messages = conversation.getMessages();
1114		Session otrSession = conversation.getOtrSession();
1115		Log.d(LOGTAG, account.getJid() + " otr session established with "
1116				+ conversation.getContactJid() + "/"
1117				+ otrSession.getSessionID().getUserID());
1118		for (int i = 0; i < messages.size(); ++i) {
1119			Message msg = messages.get(i);
1120			if ((msg.getStatus() == Message.STATUS_UNSEND || msg.getStatus() == Message.STATUS_WAITING)
1121					&& (msg.getEncryption() == Message.ENCRYPTION_OTR)) {
1122				msg.setPresence(otrSession.getSessionID().getUserID());
1123				if (msg.getType() == Message.TYPE_TEXT) {
1124					MessagePacket outPacket = mMessageGenerator
1125							.generateOtrChat(msg, true);
1126					if (outPacket != null) {
1127						msg.setStatus(Message.STATUS_SEND);
1128						databaseBackend.updateMessage(msg);
1129						sendMessagePacket(account,outPacket);
1130					}
1131				} else if (msg.getType() == Message.TYPE_IMAGE) {
1132					mJingleConnectionManager.createNewConnection(msg);
1133				}
1134			}
1135		}
1136		notifyUi(conversation, false);
1137	}
1138
1139	public boolean renewSymmetricKey(Conversation conversation) {
1140		Account account = conversation.getAccount();
1141		byte[] symmetricKey = new byte[32];
1142		this.mRandom.nextBytes(symmetricKey);
1143		Session otrSession = conversation.getOtrSession();
1144		if (otrSession != null) {
1145			MessagePacket packet = new MessagePacket();
1146			packet.setType(MessagePacket.TYPE_CHAT);
1147			packet.setFrom(account.getFullJid());
1148			packet.addChild("private", "urn:xmpp:carbons:2");
1149			packet.addChild("no-copy", "urn:xmpp:hints");
1150			packet.setTo(otrSession.getSessionID().getAccountID() + "/"
1151					+ otrSession.getSessionID().getUserID());
1152			try {
1153				packet.setBody(otrSession
1154						.transformSending(CryptoHelper.FILETRANSFER
1155								+ CryptoHelper.bytesToHex(symmetricKey)));
1156				sendMessagePacket(account,packet);
1157				conversation.setSymmetricKey(symmetricKey);
1158				return true;
1159			} catch (OtrException e) {
1160				return false;
1161			}
1162		}
1163		return false;
1164	}
1165
1166	public void pushContactToServer(Contact contact) {
1167		contact.resetOption(Contact.Options.DIRTY_DELETE);
1168		contact.setOption(Contact.Options.DIRTY_PUSH);
1169		Account account = contact.getAccount();
1170		if (account.getStatus() == Account.STATUS_ONLINE) {
1171			boolean ask = contact.getOption(Contact.Options.ASKING);
1172			boolean sendUpdates = contact.getOption(Contact.Options.PENDING_SUBSCRIPTION_REQUEST)
1173					&& contact.getOption(Contact.Options.PREEMPTIVE_GRANT);
1174			IqPacket iq = new IqPacket(IqPacket.TYPE_SET);
1175			iq.query("jabber:iq:roster").addChild(contact.asElement());
1176			account.getXmppConnection().sendIqPacket(iq, null);
1177			if (sendUpdates) {
1178				sendPresencePacket(account, mPresenceGenerator.sendPresenceUpdatesTo(contact));
1179			}
1180			if (ask) {
1181				sendPresencePacket(account, mPresenceGenerator.requestPresenceUpdatesFrom(contact));
1182			}
1183		}
1184	}
1185
1186	public void deleteContactOnServer(Contact contact) {
1187		contact.resetOption(Contact.Options.PREEMPTIVE_GRANT);
1188		contact.resetOption(Contact.Options.DIRTY_PUSH);
1189		contact.setOption(Contact.Options.DIRTY_DELETE);
1190		Account account = contact.getAccount();
1191		if (account.getStatus() == Account.STATUS_ONLINE) {
1192			IqPacket iq = new IqPacket(IqPacket.TYPE_SET);
1193			Element item = iq.query("jabber:iq:roster").addChild("item");
1194			item.setAttribute("jid", contact.getJid());
1195			item.setAttribute("subscription", "remove");
1196			account.getXmppConnection().sendIqPacket(iq, null);
1197		}
1198	}
1199
1200	public void updateConversation(Conversation conversation) {
1201		this.databaseBackend.updateConversation(conversation);
1202	}
1203
1204	public void reconnectAccount(final Account account, final boolean force) {
1205		new Thread(new Runnable() {
1206
1207			@Override
1208			public void run() {
1209				if (account.getXmppConnection() != null) {
1210					disconnect(account, force);
1211				}
1212				if (!account.isOptionSet(Account.OPTION_DISABLED)) {
1213					if (account.getXmppConnection() == null) {
1214						account.setXmppConnection(createConnection(account));
1215					}
1216					Thread thread = new Thread(account.getXmppConnection());
1217					thread.start();
1218					scheduleWakeupCall((int) (CONNECT_TIMEOUT * 1.2), false);
1219				}
1220			}
1221		}).start();
1222	}
1223
1224	public void invite(Conversation conversation, String contact) {
1225		MessagePacket packet = mMessageGenerator.invite(conversation, contact);
1226		sendMessagePacket(conversation.getAccount(),packet);
1227	}
1228
1229	public boolean markMessage(Account account, String recipient, String uuid,
1230			int status) {
1231		for (Conversation conversation : getConversations()) {
1232			if (conversation.getContactJid().equals(recipient)
1233					&& conversation.getAccount().equals(account)) {
1234				return markMessage(conversation, uuid, status);
1235			}
1236		}
1237		return false;
1238	}
1239
1240	public boolean markMessage(Conversation conversation, String uuid,
1241			int status) {
1242		for (Message message : conversation.getMessages()) {
1243			if (message.getUuid().equals(uuid)) {
1244				markMessage(message, status);
1245				return true;
1246			}
1247		}
1248		return false;
1249	}
1250
1251	public void markMessage(Message message, int status) {
1252		message.setStatus(status);
1253		databaseBackend.updateMessage(message);
1254		updateConversationUi();
1255	}
1256
1257	public SharedPreferences getPreferences() {
1258		return PreferenceManager
1259				.getDefaultSharedPreferences(getApplicationContext());
1260	}
1261
1262	public boolean confirmMessages() {
1263		return getPreferences().getBoolean("confirm_messages", true);
1264	}
1265
1266	public void notifyUi(Conversation conversation, boolean notify) {
1267		if (mOnConversationUpdate != null) {
1268			mOnConversationUpdate.onConversationUpdate();
1269		} else {
1270			UIHelper.updateNotification(getApplicationContext(),
1271					getConversations(), conversation, notify);
1272		}
1273	}
1274	
1275	public void updateConversationUi() {
1276		if (mOnConversationUpdate != null) {
1277			mOnConversationUpdate.onConversationUpdate();
1278		}
1279	}
1280	
1281	public void updateAccountUi() {
1282		if (mOnAccountUpdate != null) {
1283			mOnAccountUpdate.onAccountUpdate();
1284		}
1285	}
1286	
1287	public void updateRosterUi() {
1288		if (mOnRosterUpdate != null) {
1289			mOnRosterUpdate.onRosterUpdate();
1290		}
1291	}
1292
1293	public Account findAccountByJid(String accountJid) {
1294		for (Account account : this.accounts) {
1295			if (account.getJid().equals(accountJid)) {
1296				return account;
1297			}
1298		}
1299		return null;
1300	}
1301	
1302	public Conversation findConversationByUuid(String uuid) {
1303		for (Conversation conversation : getConversations()) {
1304			if (conversation.getUuid().equals(uuid)) {
1305				return conversation;
1306			}
1307		}
1308		return null;
1309	}
1310
1311	public void markRead(Conversation conversation) {
1312		conversation.markRead();
1313		String id = conversation.popLatestMarkableMessageId();
1314		if (confirmMessages() && id != null) {
1315			Account account = conversation.getAccount();
1316			String to = conversation.getContactJid();
1317			this.sendMessagePacket(conversation.getAccount(), mMessageGenerator.confirm(account, to, id));
1318		}
1319	}
1320	
1321	public void failWaitingOtrMessages(Conversation conversation) {
1322		for (Message message : conversation.getMessages()) {
1323			if (message.getEncryption() == Message.ENCRYPTION_OTR
1324					&& message.getStatus() == Message.STATUS_WAITING) {
1325				markMessage(message, Message.STATUS_SEND_FAILED);
1326			}
1327		}
1328	}
1329
1330	public SecureRandom getRNG() {
1331		return this.mRandom;
1332	}
1333	
1334	public MemorizingTrustManager getMemorizingTrustManager() {
1335		return this.mMemorizingTrustManager;
1336	}
1337
1338	public PowerManager getPowerManager() {
1339		return this.pm;
1340	}
1341
1342	public void replyWithNotAcceptable(Account account, MessagePacket packet) {
1343		if (account.getStatus() == Account.STATUS_ONLINE) {
1344			MessagePacket error = this.mMessageGenerator
1345					.generateNotAcceptable(packet);
1346			sendMessagePacket(account,error);
1347		}
1348	}
1349
1350	public void syncRosterToDisk(final Account account) {
1351		new Thread(new Runnable() {
1352
1353			@Override
1354			public void run() {
1355				databaseBackend.writeRoster(account.getRoster());
1356			}
1357		}).start();
1358
1359	}
1360
1361	public List<String> getKnownHosts() {
1362		List<String> hosts = new ArrayList<String>();
1363		for (Account account : getAccounts()) {
1364			if (!hosts.contains(account.getServer())) {
1365				hosts.add(account.getServer());
1366			}
1367			for (Contact contact : account.getRoster().getContacts()) {
1368				if (contact.showInRoster()) {
1369					String server = contact.getServer();
1370					if (server != null && !hosts.contains(server)) {
1371						hosts.add(server);
1372					}
1373				}
1374			}
1375		}
1376		return hosts;
1377	}
1378
1379	public List<String> getKnownConferenceHosts() {
1380		ArrayList<String> mucServers = new ArrayList<String>();
1381		for (Account account : accounts) {
1382			if (account.getXmppConnection() != null) {
1383				String server = account.getXmppConnection().getMucServer();
1384				if (server != null && !mucServers.contains(server)) {
1385					mucServers.add(server);
1386				}
1387			}
1388		}
1389		return mucServers;
1390	}
1391	
1392	public void sendMessagePacket(Account account, MessagePacket packet) {
1393		account.getXmppConnection().sendMessagePacket(packet);
1394	}
1395	
1396	public void sendPresencePacket(Account account, PresencePacket packet) {
1397		account.getXmppConnection().sendPresencePacket(packet);
1398	}
1399	
1400	public void sendIqPacket(Account account, IqPacket packet, OnIqPacketReceived callback) {
1401		account.getXmppConnection().sendIqPacket(packet, callback);
1402	}
1403	
1404	public MessageGenerator getMessageGenerator() {
1405		return this.mMessageGenerator;
1406	}
1407	
1408	public PresenceGenerator getPresenceGenerator() {
1409		return this.mPresenceGenerator;
1410	}
1411	
1412	public IqGenerator getIqGenerator() {
1413		return this.mIqGenerator ;
1414	}
1415	
1416	public JingleConnectionManager getJingleConnectionManager() {
1417		return this.mJingleConnectionManager;
1418	}
1419	
1420	public interface OnConversationUpdate {
1421		public void onConversationUpdate();
1422	}
1423	
1424	public interface OnAccountUpdate {
1425		public void onAccountUpdate();
1426	}
1427	
1428	public interface OnRosterUpdate {
1429		public void onRosterUpdate();
1430	}
1431}