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.Config;
  24import eu.siacs.conversations.R;
  25import eu.siacs.conversations.crypto.PgpEngine;
  26import eu.siacs.conversations.entities.Account;
  27import eu.siacs.conversations.entities.Bookmark;
  28import eu.siacs.conversations.entities.Contact;
  29import eu.siacs.conversations.entities.Conversation;
  30import eu.siacs.conversations.entities.Downloadable;
  31import eu.siacs.conversations.entities.Message;
  32import eu.siacs.conversations.entities.MucOptions;
  33import eu.siacs.conversations.entities.MucOptions.OnRenameListener;
  34import eu.siacs.conversations.entities.Presences;
  35import eu.siacs.conversations.generator.IqGenerator;
  36import eu.siacs.conversations.generator.MessageGenerator;
  37import eu.siacs.conversations.generator.PresenceGenerator;
  38import eu.siacs.conversations.http.HttpConnectionManager;
  39import eu.siacs.conversations.parser.IqParser;
  40import eu.siacs.conversations.parser.MessageParser;
  41import eu.siacs.conversations.parser.PresenceParser;
  42import eu.siacs.conversations.persistance.DatabaseBackend;
  43import eu.siacs.conversations.persistance.FileBackend;
  44import eu.siacs.conversations.ui.UiCallback;
  45import eu.siacs.conversations.utils.CryptoHelper;
  46import eu.siacs.conversations.utils.ExceptionHelper;
  47import eu.siacs.conversations.utils.OnPhoneContactsLoadedListener;
  48import eu.siacs.conversations.utils.PRNGFixes;
  49import eu.siacs.conversations.utils.PhoneHelper;
  50import eu.siacs.conversations.utils.UIHelper;
  51import eu.siacs.conversations.xml.Element;
  52import eu.siacs.conversations.xmpp.OnBindListener;
  53import eu.siacs.conversations.xmpp.OnContactStatusChanged;
  54import eu.siacs.conversations.xmpp.OnIqPacketReceived;
  55import eu.siacs.conversations.xmpp.OnMessageAcknowledged;
  56import eu.siacs.conversations.xmpp.OnStatusChanged;
  57import eu.siacs.conversations.xmpp.XmppConnection;
  58import eu.siacs.conversations.xmpp.jingle.JingleConnectionManager;
  59import eu.siacs.conversations.xmpp.jingle.OnJinglePacketReceived;
  60import eu.siacs.conversations.xmpp.jingle.stanzas.JinglePacket;
  61import eu.siacs.conversations.xmpp.pep.Avatar;
  62import eu.siacs.conversations.xmpp.stanzas.IqPacket;
  63import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
  64import eu.siacs.conversations.xmpp.stanzas.PresencePacket;
  65import android.annotation.SuppressLint;
  66import android.app.AlarmManager;
  67import android.app.PendingIntent;
  68import android.app.Service;
  69import android.content.Context;
  70import android.content.Intent;
  71import android.content.SharedPreferences;
  72import android.database.ContentObserver;
  73import android.graphics.Bitmap;
  74import android.net.ConnectivityManager;
  75import android.net.NetworkInfo;
  76import android.net.Uri;
  77import android.os.Binder;
  78import android.os.Bundle;
  79import android.os.FileObserver;
  80import android.os.IBinder;
  81import android.os.PowerManager;
  82import android.os.PowerManager.WakeLock;
  83import android.os.SystemClock;
  84import android.preference.PreferenceManager;
  85import android.provider.ContactsContract;
  86import android.util.Log;
  87import android.util.LruCache;
  88
  89public class XmppConnectionService extends Service {
  90
  91	public DatabaseBackend databaseBackend;
  92	private FileBackend fileBackend = new FileBackend(this);
  93
  94	public long startDate;
  95
  96	private static String ACTION_MERGE_PHONE_CONTACTS = "merge_phone_contacts";
  97	public static String ACTION_CLEAR_NOTIFICATION = "clear_notification";
  98
  99	private MemorizingTrustManager mMemorizingTrustManager;
 100
 101	private NotificationService mNotificationService = new NotificationService(
 102			this);
 103
 104	private MessageParser mMessageParser = new MessageParser(this);
 105	private PresenceParser mPresenceParser = new PresenceParser(this);
 106	private IqParser mIqParser = new IqParser(this);
 107	private MessageGenerator mMessageGenerator = new MessageGenerator(this);
 108	private PresenceGenerator mPresenceGenerator = new PresenceGenerator(this);
 109
 110	private List<Account> accounts;
 111	private CopyOnWriteArrayList<Conversation> conversations = null;
 112	private JingleConnectionManager mJingleConnectionManager = new JingleConnectionManager(
 113			this);
 114	private HttpConnectionManager mHttpConnectionManager = new HttpConnectionManager(
 115			this);
 116	private AvatarService mAvatarService = new AvatarService(this);
 117
 118	private OnConversationUpdate mOnConversationUpdate = null;
 119	private Integer convChangedListenerCount = 0;
 120	private OnAccountUpdate mOnAccountUpdate = null;
 121	private Integer accountChangedListenerCount = 0;
 122	private OnRosterUpdate mOnRosterUpdate = null;
 123	private Integer rosterChangedListenerCount = 0;
 124	public OnContactStatusChanged onContactStatusChanged = new OnContactStatusChanged() {
 125
 126		@Override
 127		public void onContactStatusChanged(Contact contact, boolean online) {
 128			Conversation conversation = find(getConversations(), contact);
 129			if (conversation != null) {
 130				conversation.endOtrIfNeeded();
 131				if (online && (contact.getPresences().size() == 1)) {
 132					sendUnsendMessages(conversation);
 133				}
 134			}
 135		}
 136	};
 137
 138	private SecureRandom mRandom;
 139
 140	private ContentObserver contactObserver = new ContentObserver(null) {
 141		@Override
 142		public void onChange(boolean selfChange) {
 143			super.onChange(selfChange);
 144			Intent intent = new Intent(getApplicationContext(),
 145					XmppConnectionService.class);
 146			intent.setAction(ACTION_MERGE_PHONE_CONTACTS);
 147			startService(intent);
 148		}
 149	};
 150
 151	private FileObserver fileObserver = new FileObserver(
 152			FileBackend.getConversationsDirectory()) {
 153
 154		@Override
 155		public void onEvent(int event, String path) {
 156			if (event == FileObserver.DELETE) {
 157				markFileDeleted(path.split("\\.")[0]);
 158			}
 159		}
 160	};
 161
 162	private final IBinder mBinder = new XmppConnectionBinder();
 163	private OnStatusChanged statusListener = new OnStatusChanged() {
 164
 165		@Override
 166		public void onStatusChanged(Account account) {
 167			XmppConnection connection = account.getXmppConnection();
 168			if (mOnAccountUpdate != null) {
 169				mOnAccountUpdate.onAccountUpdate();
 170				;
 171			}
 172			if (account.getStatus() == Account.STATUS_ONLINE) {
 173				for (Conversation conversation : account.pendingConferenceLeaves) {
 174					leaveMuc(conversation);
 175				}
 176				for (Conversation conversation : account.pendingConferenceJoins) {
 177					joinMuc(conversation);
 178				}
 179				mJingleConnectionManager.cancelInTransmission();
 180				List<Conversation> conversations = getConversations();
 181				for (int i = 0; i < conversations.size(); ++i) {
 182					if (conversations.get(i).getAccount() == account) {
 183						conversations.get(i).startOtrIfNeeded();
 184						sendUnsendMessages(conversations.get(i));
 185					}
 186				}
 187				if (connection != null && connection.getFeatures().csi()) {
 188					if (checkListeners()) {
 189						Log.d(Config.LOGTAG, account.getJid()
 190								+ " sending csi//inactive");
 191						connection.sendInactive();
 192					} else {
 193						Log.d(Config.LOGTAG, account.getJid()
 194								+ " sending csi//active");
 195						connection.sendActive();
 196					}
 197				}
 198				syncDirtyContacts(account);
 199				scheduleWakeupCall(Config.PING_MAX_INTERVAL, true);
 200			} else if (account.getStatus() == Account.STATUS_OFFLINE) {
 201				resetSendingToWaiting(account);
 202				if (!account.isOptionSet(Account.OPTION_DISABLED)) {
 203					int timeToReconnect = mRandom.nextInt(50) + 10;
 204					scheduleWakeupCall(timeToReconnect, false);
 205				}
 206			} else if (account.getStatus() == Account.STATUS_REGISTRATION_SUCCESSFULL) {
 207				databaseBackend.updateAccount(account);
 208				reconnectAccount(account, true);
 209			} else if ((account.getStatus() != Account.STATUS_CONNECTING)
 210					&& (account.getStatus() != Account.STATUS_NO_INTERNET)) {
 211				if (connection != null) {
 212					int next = connection.getTimeToNextAttempt();
 213					Log.d(Config.LOGTAG, account.getJid()
 214							+ ": error connecting account. try again in "
 215							+ next + "s for the "
 216							+ (connection.getAttempt() + 1) + " time");
 217					scheduleWakeupCall((int) (next * 1.2), false);
 218				}
 219			}
 220			UIHelper.showErrorNotification(getApplicationContext(),
 221					getAccounts());
 222		}
 223	};
 224
 225	private OnJinglePacketReceived jingleListener = new OnJinglePacketReceived() {
 226
 227		@Override
 228		public void onJinglePacketReceived(Account account, JinglePacket packet) {
 229			mJingleConnectionManager.deliverPacket(account, packet);
 230		}
 231	};
 232
 233	private OpenPgpServiceConnection pgpServiceConnection;
 234	private PgpEngine mPgpEngine = null;
 235	private Intent pingIntent;
 236	private PendingIntent pendingPingIntent = null;
 237	private WakeLock wakeLock;
 238	private PowerManager pm;
 239	private OnBindListener mOnBindListener = new OnBindListener() {
 240
 241		@Override
 242		public void onBind(final Account account) {
 243			account.getRoster().clearPresences();
 244			account.clearPresences(); // self presences
 245			account.pendingConferenceJoins.clear();
 246			account.pendingConferenceLeaves.clear();
 247			fetchRosterFromServer(account);
 248			fetchBookmarks(account);
 249			sendPresencePacket(account,
 250					mPresenceGenerator.sendPresence(account));
 251			connectMultiModeConversations(account);
 252			updateConversationUi();
 253		}
 254	};
 255
 256	private OnMessageAcknowledged mOnMessageAcknowledgedListener = new OnMessageAcknowledged() {
 257
 258		@Override
 259		public void onMessageAcknowledged(Account account, String uuid) {
 260			for (Conversation conversation : getConversations()) {
 261				if (conversation.getAccount() == account) {
 262					for (Message message : conversation.getMessages()) {
 263						if ((message.getStatus() == Message.STATUS_UNSEND || message
 264								.getStatus() == Message.STATUS_WAITING)
 265								&& message.getUuid().equals(uuid)) {
 266							markMessage(message, Message.STATUS_SEND);
 267							return;
 268						}
 269					}
 270				}
 271			}
 272		}
 273	};
 274	private LruCache<String, Bitmap> mBitmapCache;
 275
 276	public PgpEngine getPgpEngine() {
 277		if (pgpServiceConnection.isBound()) {
 278			if (this.mPgpEngine == null) {
 279				this.mPgpEngine = new PgpEngine(new OpenPgpApi(
 280						getApplicationContext(),
 281						pgpServiceConnection.getService()), this);
 282			}
 283			return mPgpEngine;
 284		} else {
 285			return null;
 286		}
 287
 288	}
 289
 290	public FileBackend getFileBackend() {
 291		return this.fileBackend;
 292	}
 293
 294	public AvatarService getAvatarService() {
 295		return this.mAvatarService;
 296	}
 297
 298	public Message attachImageToConversation(final Conversation conversation,
 299			final Uri uri, final UiCallback<Message> callback) {
 300		final Message message;
 301		if (conversation.getNextEncryption(forceEncryption()) == Message.ENCRYPTION_PGP) {
 302			message = new Message(conversation, "",
 303					Message.ENCRYPTION_DECRYPTED);
 304		} else {
 305			message = new Message(conversation, "",
 306					conversation.getNextEncryption(forceEncryption()));
 307		}
 308		message.setPresence(conversation.getNextPresence());
 309		message.setType(Message.TYPE_IMAGE);
 310		message.setStatus(Message.STATUS_OFFERED);
 311		new Thread(new Runnable() {
 312
 313			@Override
 314			public void run() {
 315				try {
 316					getFileBackend().copyImageToPrivateStorage(message, uri);
 317					if (conversation.getNextEncryption(forceEncryption()) == Message.ENCRYPTION_PGP) {
 318						getPgpEngine().encrypt(message, callback);
 319					} else {
 320						callback.success(message);
 321					}
 322				} catch (FileBackend.ImageCopyException e) {
 323					callback.error(e.getResId(), message);
 324				}
 325			}
 326		}).start();
 327		return message;
 328	}
 329
 330	public Conversation find(Bookmark bookmark) {
 331		return find(bookmark.getAccount(), bookmark.getJid());
 332	}
 333
 334	public Conversation find(Account account, String jid) {
 335		return find(getConversations(), account, jid);
 336	}
 337
 338	public class XmppConnectionBinder extends Binder {
 339		public XmppConnectionService getService() {
 340			return XmppConnectionService.this;
 341		}
 342	}
 343
 344	@Override
 345	public int onStartCommand(Intent intent, int flags, int startId) {
 346		if (intent != null && intent.getAction() != null) {
 347			if (intent.getAction().equals(ACTION_MERGE_PHONE_CONTACTS)) {
 348				mergePhoneContactsWithRoster();
 349				return START_STICKY;
 350			} else if (intent.getAction().equals(Intent.ACTION_SHUTDOWN)) {
 351				logoutAndSave();
 352				return START_NOT_STICKY;
 353			} else if (intent.getAction().equals(ACTION_CLEAR_NOTIFICATION)) {
 354				mNotificationService.clear();
 355			}
 356		}
 357		this.wakeLock.acquire();
 358
 359		for (Account account : accounts) {
 360			if (!account.isOptionSet(Account.OPTION_DISABLED)) {
 361				if (!hasInternetConnection()) {
 362					account.setStatus(Account.STATUS_NO_INTERNET);
 363					if (statusListener != null) {
 364						statusListener.onStatusChanged(account);
 365					}
 366				} else {
 367					if (account.getStatus() == Account.STATUS_NO_INTERNET) {
 368						account.setStatus(Account.STATUS_OFFLINE);
 369						if (statusListener != null) {
 370							statusListener.onStatusChanged(account);
 371						}
 372					}
 373					if (account.getStatus() == Account.STATUS_ONLINE) {
 374						long lastReceived = account.getXmppConnection()
 375								.getLastPacketReceived();
 376						long lastSent = account.getXmppConnection()
 377								.getLastPingSent();
 378						if (lastSent - lastReceived >= Config.PING_TIMEOUT * 1000) {
 379							Log.d(Config.LOGTAG, account.getJid()
 380									+ ": ping timeout");
 381							this.reconnectAccount(account, true);
 382						} else if (SystemClock.elapsedRealtime() - lastReceived >= Config.PING_MIN_INTERVAL * 1000) {
 383							account.getXmppConnection().sendPing();
 384							this.scheduleWakeupCall(2, false);
 385						}
 386					} else if (account.getStatus() == Account.STATUS_OFFLINE) {
 387						if (account.getXmppConnection() == null) {
 388							account.setXmppConnection(this
 389									.createConnection(account));
 390						}
 391						new Thread(account.getXmppConnection()).start();
 392					} else if ((account.getStatus() == Account.STATUS_CONNECTING)
 393							&& ((SystemClock.elapsedRealtime() - account
 394									.getXmppConnection().getLastConnect()) / 1000 >= Config.CONNECT_TIMEOUT)) {
 395						Log.d(Config.LOGTAG, account.getJid()
 396								+ ": time out during connect reconnecting");
 397						reconnectAccount(account, true);
 398					} else {
 399						if (account.getXmppConnection().getTimeToNextAttempt() <= 0) {
 400							reconnectAccount(account, true);
 401						}
 402					}
 403					// in any case. reschedule wakup call
 404					this.scheduleWakeupCall(Config.PING_MAX_INTERVAL, true);
 405				}
 406				if (mOnAccountUpdate != null) {
 407					mOnAccountUpdate.onAccountUpdate();
 408				}
 409			}
 410		}
 411		if (wakeLock.isHeld()) {
 412			try {
 413				wakeLock.release();
 414			} catch (RuntimeException re) {
 415			}
 416		}
 417		return START_STICKY;
 418	}
 419
 420	public boolean hasInternetConnection() {
 421		ConnectivityManager cm = (ConnectivityManager) getApplicationContext()
 422				.getSystemService(Context.CONNECTIVITY_SERVICE);
 423		NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
 424		return activeNetwork != null && activeNetwork.isConnected();
 425	}
 426
 427	@SuppressLint("TrulyRandom")
 428	@Override
 429	public void onCreate() {
 430		ExceptionHelper.init(getApplicationContext());
 431		PRNGFixes.apply();
 432		this.mRandom = new SecureRandom();
 433		this.mMemorizingTrustManager = new MemorizingTrustManager(
 434				getApplicationContext());
 435
 436		int maxMemory = (int) (Runtime.getRuntime().maxMemory() / 1024);
 437		int cacheSize = maxMemory / 8;
 438		this.mBitmapCache = new LruCache<String, Bitmap>(cacheSize) {
 439			@Override
 440			protected int sizeOf(String key, Bitmap bitmap) {
 441				return bitmap.getByteCount() / 1024;
 442			}
 443		};
 444
 445		this.databaseBackend = DatabaseBackend
 446				.getInstance(getApplicationContext());
 447		this.accounts = databaseBackend.getAccounts();
 448
 449		for (Account account : this.accounts) {
 450			this.databaseBackend.readRoster(account.getRoster());
 451		}
 452		this.mergePhoneContactsWithRoster();
 453		this.getConversations();
 454
 455		getContentResolver().registerContentObserver(
 456				ContactsContract.Contacts.CONTENT_URI, true, contactObserver);
 457		this.fileObserver.startWatching();
 458		this.pgpServiceConnection = new OpenPgpServiceConnection(
 459				getApplicationContext(), "org.sufficientlysecure.keychain");
 460		this.pgpServiceConnection.bindToService();
 461
 462		this.pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
 463		this.wakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK,
 464				"XmppConnectionService");
 465	}
 466
 467	@Override
 468	public void onDestroy() {
 469		super.onDestroy();
 470		this.logoutAndSave();
 471	}
 472
 473	@Override
 474	public void onTaskRemoved(Intent rootIntent) {
 475		super.onTaskRemoved(rootIntent);
 476		this.logoutAndSave();
 477	}
 478
 479	private void logoutAndSave() {
 480		for (Account account : accounts) {
 481			databaseBackend.writeRoster(account.getRoster());
 482			if (account.getXmppConnection() != null) {
 483				disconnect(account, false);
 484			}
 485		}
 486		Context context = getApplicationContext();
 487		AlarmManager alarmManager = (AlarmManager) context
 488				.getSystemService(Context.ALARM_SERVICE);
 489		Intent intent = new Intent(context, EventReceiver.class);
 490		alarmManager.cancel(PendingIntent.getBroadcast(context, 0, intent, 0));
 491		Log.d(Config.LOGTAG, "good bye");
 492		stopSelf();
 493	}
 494
 495	protected void scheduleWakeupCall(int seconds, boolean ping) {
 496		long timeToWake = SystemClock.elapsedRealtime() + seconds * 1000;
 497		Context context = getApplicationContext();
 498		AlarmManager alarmManager = (AlarmManager) context
 499				.getSystemService(Context.ALARM_SERVICE);
 500
 501		if (ping) {
 502			if (this.pingIntent == null) {
 503				this.pingIntent = new Intent(context, EventReceiver.class);
 504				this.pingIntent.setAction("ping");
 505				this.pingIntent.putExtra("time", timeToWake);
 506				this.pendingPingIntent = PendingIntent.getBroadcast(context, 0,
 507						this.pingIntent, 0);
 508				alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP,
 509						timeToWake, pendingPingIntent);
 510			} else {
 511				long scheduledTime = this.pingIntent.getLongExtra("time", 0);
 512				if (scheduledTime < SystemClock.elapsedRealtime()
 513						|| (scheduledTime > timeToWake)) {
 514					this.pingIntent.putExtra("time", timeToWake);
 515					alarmManager.cancel(this.pendingPingIntent);
 516					this.pendingPingIntent = PendingIntent.getBroadcast(
 517							context, 0, this.pingIntent, 0);
 518					alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP,
 519							timeToWake, pendingPingIntent);
 520				}
 521			}
 522		} else {
 523			Intent intent = new Intent(context, EventReceiver.class);
 524			intent.setAction("ping_check");
 525			PendingIntent alarmIntent = PendingIntent.getBroadcast(context, 0,
 526					intent, 0);
 527			alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP, timeToWake,
 528					alarmIntent);
 529		}
 530
 531	}
 532
 533	public XmppConnection createConnection(Account account) {
 534		SharedPreferences sharedPref = getPreferences();
 535		account.setResource(sharedPref.getString("resource", "mobile")
 536				.toLowerCase(Locale.getDefault()));
 537		XmppConnection connection = new XmppConnection(account, this);
 538		connection.setOnMessagePacketReceivedListener(this.mMessageParser);
 539		connection.setOnStatusChangedListener(this.statusListener);
 540		connection.setOnPresencePacketReceivedListener(this.mPresenceParser);
 541		connection.setOnUnregisteredIqPacketReceivedListener(this.mIqParser);
 542		connection.setOnJinglePacketReceivedListener(this.jingleListener);
 543		connection.setOnBindListener(this.mOnBindListener);
 544		connection
 545				.setOnMessageAcknowledgeListener(this.mOnMessageAcknowledgedListener);
 546		return connection;
 547	}
 548
 549	public void sendMessage(Message message) {
 550		Account account = message.getConversation().getAccount();
 551		account.deactivateGracePeriod();
 552		Conversation conv = message.getConversation();
 553		MessagePacket packet = null;
 554		boolean saveInDb = true;
 555		boolean send = false;
 556		if (account.getStatus() == Account.STATUS_ONLINE
 557				&& account.getXmppConnection() != null) {
 558			if (message.getType() == Message.TYPE_IMAGE) {
 559				if (message.getPresence() != null) {
 560					if (message.getEncryption() == Message.ENCRYPTION_OTR) {
 561						if (!conv.hasValidOtrSession()
 562								&& (message.getPresence() != null)) {
 563							conv.startOtrSession(this, message.getPresence(),
 564									true);
 565							message.setStatus(Message.STATUS_WAITING);
 566						} else if (conv.hasValidOtrSession()
 567								&& conv.getOtrSession().getSessionStatus() == SessionStatus.ENCRYPTED) {
 568							mJingleConnectionManager
 569									.createNewConnection(message);
 570						}
 571					} else {
 572						mJingleConnectionManager.createNewConnection(message);
 573					}
 574				} else {
 575					if (message.getEncryption() == Message.ENCRYPTION_OTR) {
 576						conv.startOtrIfNeeded();
 577					}
 578					message.setStatus(Message.STATUS_WAITING);
 579				}
 580			} else {
 581				if (message.getEncryption() == Message.ENCRYPTION_OTR) {
 582					if (!conv.hasValidOtrSession()
 583							&& (message.getPresence() != null)) {
 584						conv.startOtrSession(this, message.getPresence(), true);
 585						message.setStatus(Message.STATUS_WAITING);
 586					} else if (conv.hasValidOtrSession()
 587							&& conv.getOtrSession().getSessionStatus() == SessionStatus.ENCRYPTED) {
 588						message.setPresence(conv.getOtrSession().getSessionID()
 589								.getUserID());
 590						packet = mMessageGenerator.generateOtrChat(message);
 591						send = true;
 592
 593					} else if (message.getPresence() == null) {
 594						conv.startOtrIfNeeded();
 595						message.setStatus(Message.STATUS_WAITING);
 596					}
 597				} else if (message.getEncryption() == Message.ENCRYPTION_DECRYPTED) {
 598					message.getConversation().endOtrIfNeeded();
 599					failWaitingOtrMessages(message.getConversation());
 600					packet = mMessageGenerator.generatePgpChat(message);
 601					send = true;
 602				} else {
 603					message.getConversation().endOtrIfNeeded();
 604					failWaitingOtrMessages(message.getConversation());
 605					packet = mMessageGenerator.generateChat(message);
 606					send = true;
 607				}
 608			}
 609			if (!account.getXmppConnection().getFeatures().sm()
 610					&& conv.getMode() != Conversation.MODE_MULTI) {
 611				message.setStatus(Message.STATUS_SEND);
 612			}
 613		} else {
 614			message.setStatus(Message.STATUS_WAITING);
 615			if (message.getType() == Message.TYPE_TEXT) {
 616				if (message.getEncryption() == Message.ENCRYPTION_DECRYPTED) {
 617					String pgpBody = message.getEncryptedBody();
 618					String decryptedBody = message.getBody();
 619					message.setBody(pgpBody);
 620					message.setEncryption(Message.ENCRYPTION_PGP);
 621					databaseBackend.createMessage(message);
 622					saveInDb = false;
 623					message.setBody(decryptedBody);
 624					message.setEncryption(Message.ENCRYPTION_DECRYPTED);
 625				} else if (message.getEncryption() == Message.ENCRYPTION_OTR) {
 626					if (conv.hasValidOtrSession()) {
 627						message.setPresence(conv.getOtrSession().getSessionID()
 628								.getUserID());
 629					} else if (!conv.hasValidOtrSession()
 630							&& message.getPresence() != null) {
 631						conv.startOtrSession(this, message.getPresence(), false);
 632					}
 633				}
 634			}
 635
 636		}
 637		conv.add(message);
 638		if (saveInDb) {
 639			if (message.getEncryption() == Message.ENCRYPTION_NONE
 640					|| saveEncryptedMessages()) {
 641				databaseBackend.createMessage(message);
 642			}
 643		}
 644		if ((send) && (packet != null)) {
 645			sendMessagePacket(account, packet);
 646		}
 647		updateConversationUi();
 648	}
 649
 650	private void sendUnsendMessages(Conversation conversation) {
 651		for (int i = 0; i < conversation.getMessages().size(); ++i) {
 652			int status = conversation.getMessages().get(i).getStatus();
 653			if (status == Message.STATUS_WAITING) {
 654				resendMessage(conversation.getMessages().get(i));
 655			}
 656		}
 657	}
 658
 659	private void resendMessage(Message message) {
 660		Account account = message.getConversation().getAccount();
 661		MessagePacket packet = null;
 662		if (message.getEncryption() == Message.ENCRYPTION_OTR) {
 663			Presences presences = message.getConversation().getContact()
 664					.getPresences();
 665			if (!message.getConversation().hasValidOtrSession()) {
 666				if ((message.getPresence() != null)
 667						&& (presences.has(message.getPresence()))) {
 668					message.getConversation().startOtrSession(this,
 669							message.getPresence(), true);
 670				} else {
 671					if (presences.size() == 1) {
 672						String presence = presences.asStringArray()[0];
 673						message.getConversation().startOtrSession(this,
 674								presence, true);
 675					}
 676				}
 677			} else {
 678				if (message.getConversation().getOtrSession()
 679						.getSessionStatus() == SessionStatus.ENCRYPTED) {
 680					if (message.getType() == Message.TYPE_TEXT) {
 681						packet = mMessageGenerator.generateOtrChat(message,
 682								true);
 683					} else if (message.getType() == Message.TYPE_IMAGE) {
 684						mJingleConnectionManager.createNewConnection(message);
 685					}
 686				}
 687			}
 688		} else if (message.getType() == Message.TYPE_TEXT) {
 689			if (message.getEncryption() == Message.ENCRYPTION_NONE) {
 690				packet = mMessageGenerator.generateChat(message, true);
 691			} else if ((message.getEncryption() == Message.ENCRYPTION_DECRYPTED)
 692					|| (message.getEncryption() == Message.ENCRYPTION_PGP)) {
 693				packet = mMessageGenerator.generatePgpChat(message, true);
 694			}
 695		} else if (message.getType() == Message.TYPE_IMAGE) {
 696			Presences presences = message.getConversation().getContact()
 697					.getPresences();
 698			if ((message.getPresence() != null)
 699					&& (presences.has(message.getPresence()))) {
 700				markMessage(message, Message.STATUS_OFFERED);
 701				mJingleConnectionManager.createNewConnection(message);
 702			} else {
 703				if (presences.size() == 1) {
 704					String presence = presences.asStringArray()[0];
 705					message.setPresence(presence);
 706					markMessage(message, Message.STATUS_OFFERED);
 707					mJingleConnectionManager.createNewConnection(message);
 708				}
 709			}
 710		}
 711		if (packet != null) {
 712			if (!account.getXmppConnection().getFeatures().sm()
 713					&& message.getConversation().getMode() != Conversation.MODE_MULTI) {
 714				markMessage(message, Message.STATUS_SEND);
 715			} else {
 716				markMessage(message, Message.STATUS_UNSEND);
 717			}
 718			sendMessagePacket(account, packet);
 719		}
 720	}
 721
 722	public void fetchRosterFromServer(Account account) {
 723		IqPacket iqPacket = new IqPacket(IqPacket.TYPE_GET);
 724		if (!"".equals(account.getRosterVersion())) {
 725			Log.d(Config.LOGTAG, account.getJid()
 726					+ ": fetching roster version " + account.getRosterVersion());
 727		} else {
 728			Log.d(Config.LOGTAG, account.getJid() + ": fetching roster");
 729		}
 730		iqPacket.query("jabber:iq:roster").setAttribute("ver",
 731				account.getRosterVersion());
 732		account.getXmppConnection().sendIqPacket(iqPacket,
 733				new OnIqPacketReceived() {
 734
 735					@Override
 736					public void onIqPacketReceived(final Account account,
 737							IqPacket packet) {
 738						Element query = packet.findChild("query");
 739						if (query != null) {
 740							account.getRoster().markAllAsNotInRoster();
 741							mIqParser.rosterItems(account, query);
 742						}
 743					}
 744				});
 745	}
 746
 747	public void fetchBookmarks(Account account) {
 748		IqPacket iqPacket = new IqPacket(IqPacket.TYPE_GET);
 749		Element query = iqPacket.query("jabber:iq:private");
 750		query.addChild("storage", "storage:bookmarks");
 751		OnIqPacketReceived callback = new OnIqPacketReceived() {
 752
 753			@Override
 754			public void onIqPacketReceived(Account account, IqPacket packet) {
 755				Element query = packet.query();
 756				List<Bookmark> bookmarks = new CopyOnWriteArrayList<Bookmark>();
 757				Element storage = query.findChild("storage",
 758						"storage:bookmarks");
 759				if (storage != null) {
 760					for (Element item : storage.getChildren()) {
 761						if (item.getName().equals("conference")) {
 762							Bookmark bookmark = Bookmark.parse(item, account);
 763							bookmarks.add(bookmark);
 764							Conversation conversation = find(bookmark);
 765							if (conversation != null) {
 766								conversation.setBookmark(bookmark);
 767							} else {
 768								if (bookmark.autojoin()) {
 769									conversation = findOrCreateConversation(
 770											account, bookmark.getJid(), true);
 771									conversation.setBookmark(bookmark);
 772									joinMuc(conversation);
 773								}
 774							}
 775						}
 776					}
 777				}
 778				account.setBookmarks(bookmarks);
 779			}
 780		};
 781		sendIqPacket(account, iqPacket, callback);
 782
 783	}
 784
 785	public void pushBookmarks(Account account) {
 786		IqPacket iqPacket = new IqPacket(IqPacket.TYPE_SET);
 787		Element query = iqPacket.query("jabber:iq:private");
 788		Element storage = query.addChild("storage", "storage:bookmarks");
 789		for (Bookmark bookmark : account.getBookmarks()) {
 790			storage.addChild(bookmark);
 791		}
 792		sendIqPacket(account, iqPacket, null);
 793	}
 794
 795	private void mergePhoneContactsWithRoster() {
 796		PhoneHelper.loadPhoneContacts(getApplicationContext(),
 797				new OnPhoneContactsLoadedListener() {
 798					@Override
 799					public void onPhoneContactsLoaded(List<Bundle> phoneContacts) {
 800						for (Account account : accounts) {
 801							account.getRoster().clearSystemAccounts();
 802						}
 803						for (Bundle phoneContact : phoneContacts) {
 804							for (Account account : accounts) {
 805								String jid = phoneContact.getString("jid");
 806								Contact contact = account.getRoster()
 807										.getContact(jid);
 808								String systemAccount = phoneContact
 809										.getInt("phoneid")
 810										+ "#"
 811										+ phoneContact.getString("lookup");
 812								contact.setSystemAccount(systemAccount);
 813								contact.setPhotoUri(phoneContact
 814										.getString("photouri"));
 815								contact.setSystemName(phoneContact
 816										.getString("displayname"));
 817								getAvatarService().clear(contact);
 818							}
 819						}
 820					}
 821				});
 822	}
 823
 824	public List<Conversation> getConversations() {
 825		if (this.conversations == null) {
 826			Hashtable<String, Account> accountLookupTable = new Hashtable<String, Account>();
 827			for (Account account : this.accounts) {
 828				accountLookupTable.put(account.getUuid(), account);
 829			}
 830			this.conversations = databaseBackend
 831					.getConversations(Conversation.STATUS_AVAILABLE);
 832			for (Conversation conv : this.conversations) {
 833				Account account = accountLookupTable.get(conv.getAccountUuid());
 834				conv.setAccount(account);
 835				conv.setMessages(databaseBackend.getMessages(conv, 50));
 836				checkDeletedFiles(conv);
 837			}
 838		}
 839		return this.conversations;
 840	}
 841
 842	private void checkDeletedFiles(Conversation conversation) {
 843		for (Message message : conversation.getMessages()) {
 844			if (message.getType() == Message.TYPE_IMAGE
 845					&& message.getEncryption() != Message.ENCRYPTION_PGP) {
 846				if (!getFileBackend().isFileAvailable(message)) {
 847					message.setDownloadable(new DeletedDownloadable());
 848				}
 849			}
 850		}
 851	}
 852
 853	private void markFileDeleted(String uuid) {
 854		for (Conversation conversation : getConversations()) {
 855			for (Message message : conversation.getMessages()) {
 856				if (message.getType() == Message.TYPE_IMAGE
 857						&& message.getEncryption() != Message.ENCRYPTION_PGP
 858						&& message.getUuid().equals(uuid)) {
 859					if (!getFileBackend().isFileAvailable(message)) {
 860						message.setDownloadable(new DeletedDownloadable());
 861						updateConversationUi();
 862					}
 863					return;
 864				}
 865			}
 866		}
 867	}
 868
 869	public void populateWithOrderedConversations(List<Conversation> list) {
 870		populateWithOrderedConversations(list, true);
 871	}
 872
 873	public void populateWithOrderedConversations(List<Conversation> list,
 874			boolean includeConferences) {
 875		list.clear();
 876		if (includeConferences) {
 877			list.addAll(getConversations());
 878		} else {
 879			for (Conversation conversation : getConversations()) {
 880				if (conversation.getMode() == Conversation.MODE_SINGLE) {
 881					list.add(conversation);
 882				}
 883			}
 884		}
 885		Collections.sort(list, new Comparator<Conversation>() {
 886			@Override
 887			public int compare(Conversation lhs, Conversation rhs) {
 888				Message left = lhs.getLatestMessage();
 889				Message right = rhs.getLatestMessage();
 890				if (left.getTimeSent() > right.getTimeSent()) {
 891					return -1;
 892				} else if (left.getTimeSent() < right.getTimeSent()) {
 893					return 1;
 894				} else {
 895					return 0;
 896				}
 897			}
 898		});
 899	}
 900
 901	public int loadMoreMessages(Conversation conversation, long timestamp) {
 902		List<Message> messages = databaseBackend.getMessages(conversation, 50,
 903				timestamp);
 904		for (Message message : messages) {
 905			message.setConversation(conversation);
 906		}
 907		conversation.addAll(0, messages);
 908		return messages.size();
 909	}
 910
 911	public List<Account> getAccounts() {
 912		return this.accounts;
 913	}
 914
 915	public Conversation find(List<Conversation> haystack, Contact contact) {
 916		for (Conversation conversation : haystack) {
 917			if (conversation.getContact() == contact) {
 918				return conversation;
 919			}
 920		}
 921		return null;
 922	}
 923
 924	public Conversation find(List<Conversation> haystack, Account account,
 925			String jid) {
 926		for (Conversation conversation : haystack) {
 927			if ((account == null || conversation.getAccount() == account)
 928					&& (conversation.getContactJid().split("/", 2)[0]
 929							.equalsIgnoreCase(jid))) {
 930				return conversation;
 931			}
 932		}
 933		return null;
 934	}
 935
 936	public Conversation findOrCreateConversation(Account account, String jid,
 937			boolean muc) {
 938		Conversation conversation = find(account, jid);
 939		if (conversation != null) {
 940			return conversation;
 941		}
 942		conversation = databaseBackend.findConversation(account, jid);
 943		if (conversation != null) {
 944			conversation.setStatus(Conversation.STATUS_AVAILABLE);
 945			conversation.setAccount(account);
 946			if (muc) {
 947				conversation.setMode(Conversation.MODE_MULTI);
 948			} else {
 949				conversation.setMode(Conversation.MODE_SINGLE);
 950			}
 951			conversation.setMessages(databaseBackend.getMessages(conversation,
 952					50));
 953			this.databaseBackend.updateConversation(conversation);
 954		} else {
 955			String conversationName;
 956			Contact contact = account.getRoster().getContact(jid);
 957			if (contact != null) {
 958				conversationName = contact.getDisplayName();
 959			} else {
 960				conversationName = jid.split("@")[0];
 961			}
 962			if (muc) {
 963				conversation = new Conversation(conversationName, account, jid,
 964						Conversation.MODE_MULTI);
 965			} else {
 966				conversation = new Conversation(conversationName, account, jid,
 967						Conversation.MODE_SINGLE);
 968			}
 969			this.databaseBackend.createConversation(conversation);
 970		}
 971		this.conversations.add(conversation);
 972		updateConversationUi();
 973		return conversation;
 974	}
 975
 976	public void archiveConversation(Conversation conversation) {
 977		if (conversation.getMode() == Conversation.MODE_MULTI) {
 978			if (conversation.getAccount().getStatus() == Account.STATUS_ONLINE) {
 979				Bookmark bookmark = conversation.getBookmark();
 980				if (bookmark != null && bookmark.autojoin()) {
 981					bookmark.setAutojoin(false);
 982					pushBookmarks(bookmark.getAccount());
 983				}
 984			}
 985			leaveMuc(conversation);
 986		} else {
 987			conversation.endOtrIfNeeded();
 988		}
 989		this.databaseBackend.updateConversation(conversation);
 990		this.conversations.remove(conversation);
 991		updateConversationUi();
 992	}
 993
 994	public void clearConversationHistory(Conversation conversation) {
 995		this.databaseBackend.deleteMessagesInConversation(conversation);
 996		conversation.getMessages().clear();
 997		updateConversationUi();
 998	}
 999
1000	public int getConversationCount() {
1001		return this.databaseBackend.getConversationCount();
1002	}
1003
1004	public void createAccount(Account account) {
1005		databaseBackend.createAccount(account);
1006		this.accounts.add(account);
1007		this.reconnectAccount(account, false);
1008		updateAccountUi();
1009	}
1010
1011	public void updateAccount(Account account) {
1012		this.statusListener.onStatusChanged(account);
1013		databaseBackend.updateAccount(account);
1014		reconnectAccount(account, false);
1015		updateAccountUi();
1016		UIHelper.showErrorNotification(getApplicationContext(), getAccounts());
1017	}
1018
1019	public void deleteAccount(Account account) {
1020		for (Conversation conversation : conversations) {
1021			if (conversation.getAccount() == account) {
1022				if (conversation.getMode() == Conversation.MODE_MULTI) {
1023					leaveMuc(conversation);
1024				} else if (conversation.getMode() == Conversation.MODE_SINGLE) {
1025					conversation.endOtrIfNeeded();
1026				}
1027				conversations.remove(conversation);
1028			}
1029		}
1030		if (account.getXmppConnection() != null) {
1031			this.disconnect(account, true);
1032		}
1033		databaseBackend.deleteAccount(account);
1034		this.accounts.remove(account);
1035		updateAccountUi();
1036		UIHelper.showErrorNotification(getApplicationContext(), getAccounts());
1037	}
1038
1039	public void setOnConversationListChangedListener(
1040			OnConversationUpdate listener) {
1041		if (!isScreenOn()) {
1042			Log.d(Config.LOGTAG,
1043					"ignoring setOnConversationListChangedListener");
1044			return;
1045		}
1046		synchronized (this.convChangedListenerCount) {
1047			if (checkListeners()) {
1048				switchToForeground();
1049			}
1050			this.mOnConversationUpdate = listener;
1051			this.mNotificationService.setIsInForeground(true);
1052			this.convChangedListenerCount++;
1053		}
1054	}
1055
1056	public void removeOnConversationListChangedListener() {
1057		synchronized (this.convChangedListenerCount) {
1058			this.convChangedListenerCount--;
1059			if (this.convChangedListenerCount <= 0) {
1060				this.convChangedListenerCount = 0;
1061				this.mOnConversationUpdate = null;
1062				this.mNotificationService.setIsInForeground(false);
1063				if (checkListeners()) {
1064					switchToBackground();
1065				}
1066			}
1067		}
1068	}
1069
1070	public void setOnAccountListChangedListener(OnAccountUpdate listener) {
1071		if (!isScreenOn()) {
1072			Log.d(Config.LOGTAG, "ignoring setOnAccountListChangedListener");
1073			return;
1074		}
1075		synchronized (this.accountChangedListenerCount) {
1076			if (checkListeners()) {
1077				switchToForeground();
1078			}
1079			this.mOnAccountUpdate = listener;
1080			this.accountChangedListenerCount++;
1081		}
1082	}
1083
1084	public void removeOnAccountListChangedListener() {
1085		synchronized (this.accountChangedListenerCount) {
1086			this.accountChangedListenerCount--;
1087			if (this.accountChangedListenerCount <= 0) {
1088				this.mOnAccountUpdate = null;
1089				this.accountChangedListenerCount = 0;
1090				if (checkListeners()) {
1091					switchToBackground();
1092				}
1093			}
1094		}
1095	}
1096
1097	public void setOnRosterUpdateListener(OnRosterUpdate listener) {
1098		if (!isScreenOn()) {
1099			Log.d(Config.LOGTAG, "ignoring setOnRosterUpdateListener");
1100			return;
1101		}
1102		synchronized (this.rosterChangedListenerCount) {
1103			if (checkListeners()) {
1104				switchToForeground();
1105			}
1106			this.mOnRosterUpdate = listener;
1107			this.rosterChangedListenerCount++;
1108		}
1109	}
1110
1111	public void removeOnRosterUpdateListener() {
1112		synchronized (this.rosterChangedListenerCount) {
1113			this.rosterChangedListenerCount--;
1114			if (this.rosterChangedListenerCount <= 0) {
1115				this.rosterChangedListenerCount = 0;
1116				this.mOnRosterUpdate = null;
1117				if (checkListeners()) {
1118					switchToBackground();
1119				}
1120			}
1121		}
1122	}
1123
1124	private boolean checkListeners() {
1125		return (this.mOnAccountUpdate == null
1126				&& this.mOnConversationUpdate == null && this.mOnRosterUpdate == null);
1127	}
1128
1129	private void switchToForeground() {
1130		for (Account account : getAccounts()) {
1131			if (account.getStatus() == Account.STATUS_ONLINE) {
1132				XmppConnection connection = account.getXmppConnection();
1133				if (connection != null && connection.getFeatures().csi()) {
1134					connection.sendActive();
1135				}
1136			}
1137		}
1138		Log.d(Config.LOGTAG, "app switched into foreground");
1139	}
1140
1141	private void switchToBackground() {
1142		for (Account account : getAccounts()) {
1143			if (account.getStatus() == Account.STATUS_ONLINE) {
1144				XmppConnection connection = account.getXmppConnection();
1145				if (connection != null && connection.getFeatures().csi()) {
1146					connection.sendInactive();
1147				}
1148			}
1149		}
1150		this.mNotificationService.setIsInForeground(false);
1151		Log.d(Config.LOGTAG, "app switched into background");
1152	}
1153
1154	private boolean isScreenOn() {
1155		PowerManager pm = (PowerManager) this
1156				.getSystemService(Context.POWER_SERVICE);
1157		return pm.isScreenOn();
1158	}
1159
1160	public void connectMultiModeConversations(Account account) {
1161		List<Conversation> conversations = getConversations();
1162		for (int i = 0; i < conversations.size(); i++) {
1163			Conversation conversation = conversations.get(i);
1164			if ((conversation.getMode() == Conversation.MODE_MULTI)
1165					&& (conversation.getAccount() == account)) {
1166				joinMuc(conversation);
1167			}
1168		}
1169	}
1170
1171	public void joinMuc(Conversation conversation) {
1172		Account account = conversation.getAccount();
1173		account.pendingConferenceJoins.remove(conversation);
1174		account.pendingConferenceLeaves.remove(conversation);
1175		if (account.getStatus() == Account.STATUS_ONLINE) {
1176			Log.d(Config.LOGTAG,
1177					"joining conversation " + conversation.getContactJid());
1178			String nick = conversation.getMucOptions().getProposedNick();
1179			conversation.getMucOptions().setJoinNick(nick);
1180			PresencePacket packet = new PresencePacket();
1181			String joinJid = conversation.getMucOptions().getJoinJid();
1182			packet.setAttribute("to", conversation.getMucOptions().getJoinJid());
1183			Element x = new Element("x");
1184			x.setAttribute("xmlns", "http://jabber.org/protocol/muc");
1185			if (conversation.getMucOptions().getPassword() != null) {
1186				Element password = x.addChild("password");
1187				password.setContent(conversation.getMucOptions().getPassword());
1188			}
1189			String sig = account.getPgpSignature();
1190			if (sig != null) {
1191				packet.addChild("status").setContent("online");
1192				packet.addChild("x", "jabber:x:signed").setContent(sig);
1193			}
1194			if (conversation.getMessages().size() != 0) {
1195				final SimpleDateFormat mDateFormat = new SimpleDateFormat(
1196						"yyyy-MM-dd'T'HH:mm:ss.SSS'Z'", Locale.US);
1197				mDateFormat.setTimeZone(TimeZone.getTimeZone("UTC"));
1198				Date date = new Date(conversation.getLatestMessage()
1199						.getTimeSent() + 1000);
1200				x.addChild("history").setAttribute("since",
1201						mDateFormat.format(date));
1202			}
1203			packet.addChild(x);
1204			sendPresencePacket(account, packet);
1205			if (!joinJid.equals(conversation.getContactJid())) {
1206				conversation.setContactJid(joinJid);
1207				databaseBackend.updateConversation(conversation);
1208			}
1209		} else {
1210			account.pendingConferenceJoins.add(conversation);
1211		}
1212	}
1213
1214	private OnRenameListener renameListener = null;
1215	private IqGenerator mIqGenerator = new IqGenerator(this);
1216
1217	public void setOnRenameListener(OnRenameListener listener) {
1218		this.renameListener = listener;
1219	}
1220
1221	public void providePasswordForMuc(Conversation conversation, String password) {
1222		if (conversation.getMode() == Conversation.MODE_MULTI) {
1223			conversation.getMucOptions().setPassword(password);
1224			if (conversation.getBookmark() != null) {
1225				conversation.getBookmark().setAutojoin(true);
1226				pushBookmarks(conversation.getAccount());
1227			}
1228			databaseBackend.updateConversation(conversation);
1229			joinMuc(conversation);
1230		}
1231	}
1232
1233	public void renameInMuc(final Conversation conversation, final String nick) {
1234		final MucOptions options = conversation.getMucOptions();
1235		options.setJoinNick(nick);
1236		if (options.online()) {
1237			Account account = conversation.getAccount();
1238			options.setOnRenameListener(new OnRenameListener() {
1239
1240				@Override
1241				public void onRename(boolean success) {
1242					if (renameListener != null) {
1243						renameListener.onRename(success);
1244					}
1245					if (success) {
1246						conversation.setContactJid(conversation.getMucOptions()
1247								.getJoinJid());
1248						databaseBackend.updateConversation(conversation);
1249						Bookmark bookmark = conversation.getBookmark();
1250						if (bookmark != null) {
1251							bookmark.setNick(nick);
1252							pushBookmarks(bookmark.getAccount());
1253						}
1254					}
1255				}
1256			});
1257			options.flagAboutToRename();
1258			PresencePacket packet = new PresencePacket();
1259			packet.setAttribute("to", options.getJoinJid());
1260			packet.setAttribute("from", conversation.getAccount().getFullJid());
1261
1262			String sig = account.getPgpSignature();
1263			if (sig != null) {
1264				packet.addChild("status").setContent("online");
1265				packet.addChild("x", "jabber:x:signed").setContent(sig);
1266			}
1267			sendPresencePacket(account, packet);
1268		} else {
1269			conversation.setContactJid(options.getJoinJid());
1270			databaseBackend.updateConversation(conversation);
1271			if (conversation.getAccount().getStatus() == Account.STATUS_ONLINE) {
1272				Bookmark bookmark = conversation.getBookmark();
1273				if (bookmark != null) {
1274					bookmark.setNick(nick);
1275					pushBookmarks(bookmark.getAccount());
1276				}
1277				joinMuc(conversation);
1278			}
1279		}
1280	}
1281
1282	public void leaveMuc(Conversation conversation) {
1283		Account account = conversation.getAccount();
1284		account.pendingConferenceJoins.remove(conversation);
1285		account.pendingConferenceLeaves.remove(conversation);
1286		if (account.getStatus() == Account.STATUS_ONLINE) {
1287			PresencePacket packet = new PresencePacket();
1288			packet.setAttribute("to", conversation.getMucOptions().getJoinJid());
1289			packet.setAttribute("from", conversation.getAccount().getFullJid());
1290			packet.setAttribute("type", "unavailable");
1291			sendPresencePacket(conversation.getAccount(), packet);
1292			conversation.getMucOptions().setOffline();
1293			conversation.deregisterWithBookmark();
1294			Log.d(Config.LOGTAG, conversation.getAccount().getJid()
1295					+ ": leaving muc " + conversation.getContactJid());
1296		} else {
1297			account.pendingConferenceLeaves.add(conversation);
1298		}
1299	}
1300
1301	public void disconnect(Account account, boolean force) {
1302		if ((account.getStatus() == Account.STATUS_ONLINE)
1303				|| (account.getStatus() == Account.STATUS_DISABLED)) {
1304			if (!force) {
1305				List<Conversation> conversations = getConversations();
1306				for (int i = 0; i < conversations.size(); i++) {
1307					Conversation conversation = conversations.get(i);
1308					if (conversation.getAccount() == account) {
1309						if (conversation.getMode() == Conversation.MODE_MULTI) {
1310							leaveMuc(conversation);
1311						} else {
1312							if (conversation.endOtrIfNeeded()) {
1313								Log.d(Config.LOGTAG, account.getJid()
1314										+ ": ended otr session with "
1315										+ conversation.getContactJid());
1316							}
1317						}
1318					}
1319				}
1320			}
1321			account.getXmppConnection().disconnect(force);
1322		}
1323	}
1324
1325	@Override
1326	public IBinder onBind(Intent intent) {
1327		return mBinder;
1328	}
1329
1330	public void updateMessage(Message message) {
1331		databaseBackend.updateMessage(message);
1332		updateConversationUi();
1333	}
1334
1335	protected void syncDirtyContacts(Account account) {
1336		for (Contact contact : account.getRoster().getContacts()) {
1337			if (contact.getOption(Contact.Options.DIRTY_PUSH)) {
1338				pushContactToServer(contact);
1339			}
1340			if (contact.getOption(Contact.Options.DIRTY_DELETE)) {
1341				deleteContactOnServer(contact);
1342			}
1343		}
1344	}
1345
1346	public void createContact(Contact contact) {
1347		SharedPreferences sharedPref = getPreferences();
1348		boolean autoGrant = sharedPref.getBoolean("grant_new_contacts", true);
1349		if (autoGrant) {
1350			contact.setOption(Contact.Options.PREEMPTIVE_GRANT);
1351			contact.setOption(Contact.Options.ASKING);
1352		}
1353		pushContactToServer(contact);
1354	}
1355
1356	public void onOtrSessionEstablished(Conversation conversation) {
1357		Account account = conversation.getAccount();
1358		List<Message> messages = conversation.getMessages();
1359		Session otrSession = conversation.getOtrSession();
1360		Log.d(Config.LOGTAG,
1361				account.getJid() + " otr session established with "
1362						+ conversation.getContactJid() + "/"
1363						+ otrSession.getSessionID().getUserID());
1364		for (int i = 0; i < messages.size(); ++i) {
1365			Message msg = messages.get(i);
1366			if ((msg.getStatus() == Message.STATUS_UNSEND || msg.getStatus() == Message.STATUS_WAITING)
1367					&& (msg.getEncryption() == Message.ENCRYPTION_OTR)) {
1368				msg.setPresence(otrSession.getSessionID().getUserID());
1369				if (msg.getType() == Message.TYPE_TEXT) {
1370					MessagePacket outPacket = mMessageGenerator
1371							.generateOtrChat(msg, true);
1372					if (outPacket != null) {
1373						msg.setStatus(Message.STATUS_SEND);
1374						databaseBackend.updateMessage(msg);
1375						sendMessagePacket(account, outPacket);
1376					}
1377				} else if (msg.getType() == Message.TYPE_IMAGE) {
1378					mJingleConnectionManager.createNewConnection(msg);
1379				}
1380			}
1381		}
1382		updateConversationUi();
1383	}
1384
1385	public boolean renewSymmetricKey(Conversation conversation) {
1386		Account account = conversation.getAccount();
1387		byte[] symmetricKey = new byte[32];
1388		this.mRandom.nextBytes(symmetricKey);
1389		Session otrSession = conversation.getOtrSession();
1390		if (otrSession != null) {
1391			MessagePacket packet = new MessagePacket();
1392			packet.setType(MessagePacket.TYPE_CHAT);
1393			packet.setFrom(account.getFullJid());
1394			packet.addChild("private", "urn:xmpp:carbons:2");
1395			packet.addChild("no-copy", "urn:xmpp:hints");
1396			packet.setTo(otrSession.getSessionID().getAccountID() + "/"
1397					+ otrSession.getSessionID().getUserID());
1398			try {
1399				packet.setBody(otrSession
1400						.transformSending(CryptoHelper.FILETRANSFER
1401								+ CryptoHelper.bytesToHex(symmetricKey)));
1402				sendMessagePacket(account, packet);
1403				conversation.setSymmetricKey(symmetricKey);
1404				return true;
1405			} catch (OtrException e) {
1406				return false;
1407			}
1408		}
1409		return false;
1410	}
1411
1412	public void pushContactToServer(Contact contact) {
1413		contact.resetOption(Contact.Options.DIRTY_DELETE);
1414		contact.setOption(Contact.Options.DIRTY_PUSH);
1415		Account account = contact.getAccount();
1416		if (account.getStatus() == Account.STATUS_ONLINE) {
1417			boolean ask = contact.getOption(Contact.Options.ASKING);
1418			boolean sendUpdates = contact
1419					.getOption(Contact.Options.PENDING_SUBSCRIPTION_REQUEST)
1420					&& contact.getOption(Contact.Options.PREEMPTIVE_GRANT);
1421			IqPacket iq = new IqPacket(IqPacket.TYPE_SET);
1422			iq.query("jabber:iq:roster").addChild(contact.asElement());
1423			account.getXmppConnection().sendIqPacket(iq, null);
1424			if (sendUpdates) {
1425				sendPresencePacket(account,
1426						mPresenceGenerator.sendPresenceUpdatesTo(contact));
1427			}
1428			if (ask) {
1429				sendPresencePacket(account,
1430						mPresenceGenerator.requestPresenceUpdatesFrom(contact));
1431			}
1432		}
1433	}
1434
1435	public void publishAvatar(Account account, Uri image,
1436			final UiCallback<Avatar> callback) {
1437		final Bitmap.CompressFormat format = Config.AVATAR_FORMAT;
1438		final int size = Config.AVATAR_SIZE;
1439		final Avatar avatar = getFileBackend()
1440				.getPepAvatar(image, size, format);
1441		if (avatar != null) {
1442			avatar.height = size;
1443			avatar.width = size;
1444			if (format.equals(Bitmap.CompressFormat.WEBP)) {
1445				avatar.type = "image/webp";
1446			} else if (format.equals(Bitmap.CompressFormat.JPEG)) {
1447				avatar.type = "image/jpeg";
1448			} else if (format.equals(Bitmap.CompressFormat.PNG)) {
1449				avatar.type = "image/png";
1450			}
1451			if (!getFileBackend().save(avatar)) {
1452				callback.error(R.string.error_saving_avatar, avatar);
1453				return;
1454			}
1455			IqPacket packet = this.mIqGenerator.publishAvatar(avatar);
1456			this.sendIqPacket(account, packet, new OnIqPacketReceived() {
1457
1458				@Override
1459				public void onIqPacketReceived(Account account, IqPacket result) {
1460					if (result.getType() == IqPacket.TYPE_RESULT) {
1461						IqPacket packet = XmppConnectionService.this.mIqGenerator
1462								.publishAvatarMetadata(avatar);
1463						sendIqPacket(account, packet, new OnIqPacketReceived() {
1464
1465							@Override
1466							public void onIqPacketReceived(Account account,
1467									IqPacket result) {
1468								if (result.getType() == IqPacket.TYPE_RESULT) {
1469									if (account.setAvatar(avatar.getFilename())) {
1470										databaseBackend.updateAccount(account);
1471									}
1472									callback.success(avatar);
1473								} else {
1474									callback.error(
1475											R.string.error_publish_avatar_server_reject,
1476											avatar);
1477								}
1478							}
1479						});
1480					} else {
1481						callback.error(
1482								R.string.error_publish_avatar_server_reject,
1483								avatar);
1484					}
1485				}
1486			});
1487		} else {
1488			callback.error(R.string.error_publish_avatar_converting, null);
1489		}
1490	}
1491
1492	public void fetchAvatar(Account account, Avatar avatar) {
1493		fetchAvatar(account, avatar, null);
1494	}
1495
1496	public void fetchAvatar(Account account, final Avatar avatar,
1497			final UiCallback<Avatar> callback) {
1498		IqPacket packet = this.mIqGenerator.retrieveAvatar(avatar);
1499		sendIqPacket(account, packet, new OnIqPacketReceived() {
1500
1501			@Override
1502			public void onIqPacketReceived(Account account, IqPacket result) {
1503				final String ERROR = account.getJid()
1504						+ ": fetching avatar for " + avatar.owner + " failed ";
1505				if (result.getType() == IqPacket.TYPE_RESULT) {
1506					avatar.image = mIqParser.avatarData(result);
1507					if (avatar.image != null) {
1508						if (getFileBackend().save(avatar)) {
1509							if (account.getJid().equals(avatar.owner)) {
1510								if (account.setAvatar(avatar.getFilename())) {
1511									databaseBackend.updateAccount(account);
1512								}
1513								getAvatarService().clear(account);
1514								updateConversationUi();
1515								updateAccountUi();
1516							} else {
1517								Contact contact = account.getRoster()
1518										.getContact(avatar.owner);
1519								contact.setAvatar(avatar.getFilename());
1520								getAvatarService().clear(contact);
1521								updateConversationUi();
1522								updateRosterUi();
1523							}
1524							if (callback != null) {
1525								callback.success(avatar);
1526							}
1527							Log.d(Config.LOGTAG, account.getJid()
1528									+ ": succesfully fetched avatar for "
1529									+ avatar.owner);
1530							return;
1531						}
1532					} else {
1533
1534						Log.d(Config.LOGTAG, ERROR + "(parsing error)");
1535					}
1536				} else {
1537					Element error = result.findChild("error");
1538					if (error == null) {
1539						Log.d(Config.LOGTAG, ERROR + "(server error)");
1540					} else {
1541						Log.d(Config.LOGTAG, ERROR + error.toString());
1542					}
1543				}
1544				if (callback != null) {
1545					callback.error(0, null);
1546				}
1547
1548			}
1549		});
1550	}
1551
1552	public void checkForAvatar(Account account,
1553			final UiCallback<Avatar> callback) {
1554		IqPacket packet = this.mIqGenerator.retrieveAvatarMetaData(null);
1555		this.sendIqPacket(account, packet, new OnIqPacketReceived() {
1556
1557			@Override
1558			public void onIqPacketReceived(Account account, IqPacket packet) {
1559				if (packet.getType() == IqPacket.TYPE_RESULT) {
1560					Element pubsub = packet.findChild("pubsub",
1561							"http://jabber.org/protocol/pubsub");
1562					if (pubsub != null) {
1563						Element items = pubsub.findChild("items");
1564						if (items != null) {
1565							Avatar avatar = Avatar.parseMetadata(items);
1566							if (avatar != null) {
1567								avatar.owner = account.getJid();
1568								if (fileBackend.isAvatarCached(avatar)) {
1569									if (account.setAvatar(avatar.getFilename())) {
1570										databaseBackend.updateAccount(account);
1571									}
1572									getAvatarService().clear(account);
1573									callback.success(avatar);
1574								} else {
1575									fetchAvatar(account, avatar, callback);
1576								}
1577								return;
1578							}
1579						}
1580					}
1581				}
1582				callback.error(0, null);
1583			}
1584		});
1585	}
1586
1587	public void deleteContactOnServer(Contact contact) {
1588		contact.resetOption(Contact.Options.PREEMPTIVE_GRANT);
1589		contact.resetOption(Contact.Options.DIRTY_PUSH);
1590		contact.setOption(Contact.Options.DIRTY_DELETE);
1591		Account account = contact.getAccount();
1592		if (account.getStatus() == Account.STATUS_ONLINE) {
1593			IqPacket iq = new IqPacket(IqPacket.TYPE_SET);
1594			Element item = iq.query("jabber:iq:roster").addChild("item");
1595			item.setAttribute("jid", contact.getJid());
1596			item.setAttribute("subscription", "remove");
1597			account.getXmppConnection().sendIqPacket(iq, null);
1598		}
1599	}
1600
1601	public void updateConversation(Conversation conversation) {
1602		this.databaseBackend.updateConversation(conversation);
1603	}
1604
1605	public void reconnectAccount(final Account account, final boolean force) {
1606		new Thread(new Runnable() {
1607
1608			@Override
1609			public void run() {
1610				if (account.getXmppConnection() != null) {
1611					disconnect(account, force);
1612				}
1613				if (!account.isOptionSet(Account.OPTION_DISABLED)) {
1614					if (account.getXmppConnection() == null) {
1615						account.setXmppConnection(createConnection(account));
1616					}
1617					Thread thread = new Thread(account.getXmppConnection());
1618					thread.start();
1619					scheduleWakeupCall((int) (Config.CONNECT_TIMEOUT * 1.2),
1620							false);
1621				} else {
1622					account.getRoster().clearPresences();
1623					account.setXmppConnection(null);
1624				}
1625			}
1626		}).start();
1627	}
1628
1629	public void invite(Conversation conversation, String contact) {
1630		MessagePacket packet = mMessageGenerator.invite(conversation, contact);
1631		sendMessagePacket(conversation.getAccount(), packet);
1632	}
1633
1634	public void resetSendingToWaiting(Account account) {
1635		for (Conversation conversation : getConversations()) {
1636			if (conversation.getAccount() == account) {
1637				for (Message message : conversation.getMessages()) {
1638					if (message.getType() != Message.TYPE_IMAGE
1639							&& message.getStatus() == Message.STATUS_UNSEND) {
1640						markMessage(message, Message.STATUS_WAITING);
1641					}
1642				}
1643			}
1644		}
1645	}
1646
1647	public boolean markMessage(Account account, String recipient, String uuid,
1648			int status) {
1649		if (uuid == null) {
1650			return false;
1651		} else {
1652			for (Conversation conversation : getConversations()) {
1653				if (conversation.getContactJid().equals(recipient)
1654						&& conversation.getAccount().equals(account)) {
1655					return markMessage(conversation, uuid, status);
1656				}
1657			}
1658			return false;
1659		}
1660	}
1661
1662	public boolean markMessage(Conversation conversation, String uuid,
1663			int status) {
1664		if (uuid == null) {
1665			return false;
1666		} else {
1667			for (Message message : conversation.getMessages()) {
1668				if (uuid.equals(message.getUuid())
1669						|| (message.getStatus() >= Message.STATUS_SEND && uuid
1670								.equals(message.getRemoteMsgId()))) {
1671					markMessage(message, status);
1672					return true;
1673				}
1674			}
1675			return false;
1676		}
1677	}
1678
1679	public void markMessage(Message message, int status) {
1680		if (status == Message.STATUS_SEND_FAILED
1681				&& (message.getStatus() == Message.STATUS_SEND_RECEIVED || message
1682						.getStatus() == Message.STATUS_SEND_DISPLAYED)) {
1683			return;
1684		}
1685		message.setStatus(status);
1686		databaseBackend.updateMessage(message);
1687		updateConversationUi();
1688	}
1689
1690	public SharedPreferences getPreferences() {
1691		return PreferenceManager
1692				.getDefaultSharedPreferences(getApplicationContext());
1693	}
1694
1695	public boolean forceEncryption() {
1696		return getPreferences().getBoolean("force_encryption", false);
1697	}
1698
1699	public boolean confirmMessages() {
1700		return getPreferences().getBoolean("confirm_messages", true);
1701	}
1702
1703	public boolean saveEncryptedMessages() {
1704		return !getPreferences().getBoolean("dont_save_encrypted", false);
1705	}
1706
1707	public boolean indicateReceived() {
1708		return getPreferences().getBoolean("indicate_received", false);
1709	}
1710
1711	public void updateConversationUi() {
1712		if (mOnConversationUpdate != null) {
1713			mOnConversationUpdate.onConversationUpdate();
1714		}
1715	}
1716
1717	public void updateAccountUi() {
1718		if (mOnAccountUpdate != null) {
1719			mOnAccountUpdate.onAccountUpdate();
1720		}
1721	}
1722
1723	public void updateRosterUi() {
1724		if (mOnRosterUpdate != null) {
1725			mOnRosterUpdate.onRosterUpdate();
1726		}
1727	}
1728
1729	public Account findAccountByJid(String accountJid) {
1730		for (Account account : this.accounts) {
1731			if (account.getJid().equals(accountJid)) {
1732				return account;
1733			}
1734		}
1735		return null;
1736	}
1737
1738	public Conversation findConversationByUuid(String uuid) {
1739		for (Conversation conversation : getConversations()) {
1740			if (conversation.getUuid().equals(uuid)) {
1741				return conversation;
1742			}
1743		}
1744		return null;
1745	}
1746
1747	public void markRead(Conversation conversation, boolean calledByUi) {
1748		mNotificationService.clear(conversation);
1749		String id = conversation.getLatestMarkableMessageId();
1750		conversation.markRead();
1751		if (confirmMessages() && id != null && calledByUi) {
1752			Log.d(Config.LOGTAG, conversation.getAccount().getJid()
1753					+ ": sending read marker for " + conversation.getName());
1754			Account account = conversation.getAccount();
1755			String to = conversation.getContactJid();
1756			this.sendMessagePacket(conversation.getAccount(),
1757					mMessageGenerator.confirm(account, to, id));
1758		}
1759		if (!calledByUi) {
1760			updateConversationUi();
1761		}
1762	}
1763
1764	public void failWaitingOtrMessages(Conversation conversation) {
1765		for (Message message : conversation.getMessages()) {
1766			if (message.getEncryption() == Message.ENCRYPTION_OTR
1767					&& message.getStatus() == Message.STATUS_WAITING) {
1768				markMessage(message, Message.STATUS_SEND_FAILED);
1769			}
1770		}
1771	}
1772
1773	public SecureRandom getRNG() {
1774		return this.mRandom;
1775	}
1776
1777	public MemorizingTrustManager getMemorizingTrustManager() {
1778		return this.mMemorizingTrustManager;
1779	}
1780
1781	public PowerManager getPowerManager() {
1782		return this.pm;
1783	}
1784
1785	public LruCache<String, Bitmap> getBitmapCache() {
1786		return this.mBitmapCache;
1787	}
1788
1789	public void replyWithNotAcceptable(Account account, MessagePacket packet) {
1790		if (account.getStatus() == Account.STATUS_ONLINE) {
1791			MessagePacket error = this.mMessageGenerator
1792					.generateNotAcceptable(packet);
1793			sendMessagePacket(account, error);
1794		}
1795	}
1796
1797	public void syncRosterToDisk(final Account account) {
1798		new Thread(new Runnable() {
1799
1800			@Override
1801			public void run() {
1802				databaseBackend.writeRoster(account.getRoster());
1803			}
1804		}).start();
1805
1806	}
1807
1808	public List<String> getKnownHosts() {
1809		List<String> hosts = new ArrayList<String>();
1810		for (Account account : getAccounts()) {
1811			if (!hosts.contains(account.getServer())) {
1812				hosts.add(account.getServer());
1813			}
1814			for (Contact contact : account.getRoster().getContacts()) {
1815				if (contact.showInRoster()) {
1816					String server = contact.getServer();
1817					if (server != null && !hosts.contains(server)) {
1818						hosts.add(server);
1819					}
1820				}
1821			}
1822		}
1823		return hosts;
1824	}
1825
1826	public List<String> getKnownConferenceHosts() {
1827		ArrayList<String> mucServers = new ArrayList<String>();
1828		for (Account account : accounts) {
1829			if (account.getXmppConnection() != null) {
1830				String server = account.getXmppConnection().getMucServer();
1831				if (server != null && !mucServers.contains(server)) {
1832					mucServers.add(server);
1833				}
1834			}
1835		}
1836		return mucServers;
1837	}
1838
1839	public void sendMessagePacket(Account account, MessagePacket packet) {
1840		XmppConnection connection = account.getXmppConnection();
1841		if (connection != null) {
1842			connection.sendMessagePacket(packet);
1843		}
1844	}
1845
1846	public void sendPresencePacket(Account account, PresencePacket packet) {
1847		XmppConnection connection = account.getXmppConnection();
1848		if (connection != null) {
1849			connection.sendPresencePacket(packet);
1850		}
1851	}
1852
1853	public void sendIqPacket(Account account, IqPacket packet,
1854			OnIqPacketReceived callback) {
1855		XmppConnection connection = account.getXmppConnection();
1856		if (connection != null) {
1857			connection.sendIqPacket(packet, callback);
1858		}
1859	}
1860
1861	public MessageGenerator getMessageGenerator() {
1862		return this.mMessageGenerator;
1863	}
1864
1865	public PresenceGenerator getPresenceGenerator() {
1866		return this.mPresenceGenerator;
1867	}
1868
1869	public IqGenerator getIqGenerator() {
1870		return this.mIqGenerator;
1871	}
1872
1873	public JingleConnectionManager getJingleConnectionManager() {
1874		return this.mJingleConnectionManager;
1875	}
1876
1877	public interface OnConversationUpdate {
1878		public void onConversationUpdate();
1879	}
1880
1881	public interface OnAccountUpdate {
1882		public void onAccountUpdate();
1883	}
1884
1885	public interface OnRosterUpdate {
1886		public void onRosterUpdate();
1887	}
1888
1889	public List<Contact> findContacts(String jid) {
1890		ArrayList<Contact> contacts = new ArrayList<Contact>();
1891		for (Account account : getAccounts()) {
1892			if (!account.isOptionSet(Account.OPTION_DISABLED)) {
1893				Contact contact = account.getRoster().getContactFromRoster(jid);
1894				if (contact != null) {
1895					contacts.add(contact);
1896				}
1897			}
1898		}
1899		return contacts;
1900	}
1901
1902	public NotificationService getNotificationService() {
1903		return this.mNotificationService;
1904	}
1905
1906	public HttpConnectionManager getHttpConnectionManager() {
1907		return this.mHttpConnectionManager;
1908	}
1909
1910	private class DeletedDownloadable implements Downloadable {
1911
1912		@Override
1913		public boolean start() {
1914			return false;
1915		}
1916
1917		@Override
1918		public int getStatus() {
1919			return Downloadable.STATUS_DELETED;
1920		}
1921
1922		@Override
1923		public long getFileSize() {
1924			return 0;
1925		}
1926
1927	}
1928
1929	public void resendFailedMessages(Message message) {
1930		List<Message> messages = new ArrayList<Message>();
1931		Message current = message;
1932		while(current.getStatus() == Message.STATUS_SEND_FAILED) {
1933			messages.add(current);
1934			if (current.mergable(current.next())) {
1935				current = current.next();
1936			} else {
1937				break;
1938			}
1939		}
1940		for(Message msg: messages) {
1941			markMessage(msg, Message.STATUS_WAITING);
1942			this.resendMessage(msg);
1943		}
1944	}
1945}