XmppConnectionService.java

   1package eu.siacs.conversations.services;
   2
   3import android.annotation.SuppressLint;
   4import android.app.AlarmManager;
   5import android.app.PendingIntent;
   6import android.app.Service;
   7import android.content.Context;
   8import android.content.Intent;
   9import android.content.SharedPreferences;
  10import android.database.ContentObserver;
  11import android.graphics.Bitmap;
  12import android.net.ConnectivityManager;
  13import android.net.NetworkInfo;
  14import android.net.Uri;
  15import android.os.Binder;
  16import android.os.Bundle;
  17import android.os.FileObserver;
  18import android.os.IBinder;
  19import android.os.PowerManager;
  20import android.os.PowerManager.WakeLock;
  21import android.os.SystemClock;
  22import android.preference.PreferenceManager;
  23import android.provider.ContactsContract;
  24import android.util.Log;
  25import android.util.LruCache;
  26
  27import net.java.otr4j.OtrException;
  28import net.java.otr4j.session.Session;
  29import net.java.otr4j.session.SessionID;
  30import net.java.otr4j.session.SessionStatus;
  31
  32import org.openintents.openpgp.util.OpenPgpApi;
  33import org.openintents.openpgp.util.OpenPgpServiceConnection;
  34
  35import java.io.FileNotFoundException;
  36import java.io.IOException;
  37import java.io.OutputStream;
  38import java.security.SecureRandom;
  39import java.text.SimpleDateFormat;
  40import java.util.ArrayList;
  41import java.util.Collections;
  42import java.util.Comparator;
  43import java.util.Date;
  44import java.util.Hashtable;
  45import java.util.List;
  46import java.util.Locale;
  47import java.util.TimeZone;
  48import java.util.concurrent.CopyOnWriteArrayList;
  49
  50import de.duenndns.ssl.MemorizingTrustManager;
  51import eu.siacs.conversations.Config;
  52import eu.siacs.conversations.R;
  53import eu.siacs.conversations.crypto.PgpEngine;
  54import eu.siacs.conversations.entities.Account;
  55import eu.siacs.conversations.entities.Bookmark;
  56import eu.siacs.conversations.entities.Contact;
  57import eu.siacs.conversations.entities.Conversation;
  58import eu.siacs.conversations.entities.Downloadable;
  59import eu.siacs.conversations.entities.DownloadableFile;
  60import eu.siacs.conversations.entities.DownloadablePlaceholder;
  61import eu.siacs.conversations.entities.Message;
  62import eu.siacs.conversations.entities.MucOptions;
  63import eu.siacs.conversations.entities.MucOptions.OnRenameListener;
  64import eu.siacs.conversations.entities.Presences;
  65import eu.siacs.conversations.generator.IqGenerator;
  66import eu.siacs.conversations.generator.MessageGenerator;
  67import eu.siacs.conversations.generator.PresenceGenerator;
  68import eu.siacs.conversations.http.HttpConnectionManager;
  69import eu.siacs.conversations.parser.IqParser;
  70import eu.siacs.conversations.parser.MessageParser;
  71import eu.siacs.conversations.parser.PresenceParser;
  72import eu.siacs.conversations.persistance.DatabaseBackend;
  73import eu.siacs.conversations.persistance.FileBackend;
  74import eu.siacs.conversations.ui.UiCallback;
  75import eu.siacs.conversations.utils.CryptoHelper;
  76import eu.siacs.conversations.utils.ExceptionHelper;
  77import eu.siacs.conversations.utils.OnPhoneContactsLoadedListener;
  78import eu.siacs.conversations.utils.PRNGFixes;
  79import eu.siacs.conversations.utils.PhoneHelper;
  80import eu.siacs.conversations.utils.UIHelper;
  81import eu.siacs.conversations.xml.Element;
  82import eu.siacs.conversations.xmpp.OnBindListener;
  83import eu.siacs.conversations.xmpp.OnContactStatusChanged;
  84import eu.siacs.conversations.xmpp.OnIqPacketReceived;
  85import eu.siacs.conversations.xmpp.OnMessageAcknowledged;
  86import eu.siacs.conversations.xmpp.OnStatusChanged;
  87import eu.siacs.conversations.xmpp.XmppConnection;
  88import eu.siacs.conversations.xmpp.jid.InvalidJidException;
  89import eu.siacs.conversations.xmpp.jid.Jid;
  90import eu.siacs.conversations.xmpp.jingle.JingleConnectionManager;
  91import eu.siacs.conversations.xmpp.jingle.OnJinglePacketReceived;
  92import eu.siacs.conversations.xmpp.jingle.stanzas.JinglePacket;
  93import eu.siacs.conversations.xmpp.pep.Avatar;
  94import eu.siacs.conversations.xmpp.stanzas.IqPacket;
  95import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
  96import eu.siacs.conversations.xmpp.stanzas.PresencePacket;
  97
  98public class XmppConnectionService extends Service {
  99
 100	public static String ACTION_CLEAR_NOTIFICATION = "clear_notification";
 101	private static String ACTION_MERGE_PHONE_CONTACTS = "merge_phone_contacts";
 102	private ContentObserver contactObserver = new ContentObserver(null) {
 103		@Override
 104		public void onChange(boolean selfChange) {
 105			super.onChange(selfChange);
 106			Intent intent = new Intent(getApplicationContext(),
 107					XmppConnectionService.class);
 108			intent.setAction(ACTION_MERGE_PHONE_CONTACTS);
 109			startService(intent);
 110		}
 111	};
 112	private final IBinder mBinder = new XmppConnectionBinder();
 113	public DatabaseBackend databaseBackend;
 114	public OnContactStatusChanged onContactStatusChanged = new OnContactStatusChanged() {
 115
 116		@Override
 117		public void onContactStatusChanged(Contact contact, boolean online) {
 118			Conversation conversation = find(getConversations(), contact);
 119			if (conversation != null) {
 120				if (online && contact.getPresences().size() > 1) {
 121					conversation.endOtrIfNeeded();
 122				} else {
 123					conversation.resetOtrSession();
 124				}
 125				if (online && (contact.getPresences().size() == 1)) {
 126					sendUnsendMessages(conversation);
 127				}
 128			}
 129		}
 130	};
 131	private FileBackend fileBackend = new FileBackend(this);
 132	private MemorizingTrustManager mMemorizingTrustManager;
 133	private NotificationService mNotificationService = new NotificationService(
 134			this);
 135	private MessageParser mMessageParser = new MessageParser(this);
 136	private PresenceParser mPresenceParser = new PresenceParser(this);
 137	private IqParser mIqParser = new IqParser(this);
 138	private MessageGenerator mMessageGenerator = new MessageGenerator(this);
 139	private PresenceGenerator mPresenceGenerator = new PresenceGenerator(this);
 140	private List<Account> accounts;
 141	private CopyOnWriteArrayList<Conversation> conversations = null;
 142	private JingleConnectionManager mJingleConnectionManager = new JingleConnectionManager(
 143			this);
 144	private HttpConnectionManager mHttpConnectionManager = new HttpConnectionManager(
 145			this);
 146	private AvatarService mAvatarService = new AvatarService(this);
 147	private OnConversationUpdate mOnConversationUpdate = null;
 148	private Integer convChangedListenerCount = 0;
 149	private OnAccountUpdate mOnAccountUpdate = null;
 150	private OnStatusChanged statusListener = new OnStatusChanged() {
 151
 152		@Override
 153		public void onStatusChanged(Account account) {
 154			XmppConnection connection = account.getXmppConnection();
 155			if (mOnAccountUpdate != null) {
 156				mOnAccountUpdate.onAccountUpdate();
 157			}
 158			if (account.getStatus() == Account.STATUS_ONLINE) {
 159				for (Conversation conversation : account.pendingConferenceLeaves) {
 160					leaveMuc(conversation);
 161				}
 162				for (Conversation conversation : account.pendingConferenceJoins) {
 163					joinMuc(conversation);
 164				}
 165				mJingleConnectionManager.cancelInTransmission();
 166				List<Conversation> conversations = getConversations();
 167				for (Conversation conversation : conversations) {
 168					if (conversation.getAccount() == account) {
 169						conversation.startOtrIfNeeded();
 170						sendUnsendMessages(conversation);
 171					}
 172				}
 173				if (connection != null && connection.getFeatures().csi()) {
 174					if (checkListeners()) {
 175						Log.d(Config.LOGTAG, account.getJid().toBareJid()
 176								+ " sending csi//inactive");
 177						connection.sendInactive();
 178					} else {
 179						Log.d(Config.LOGTAG, account.getJid().toBareJid()
 180								+ " sending csi//active");
 181						connection.sendActive();
 182					}
 183				}
 184				syncDirtyContacts(account);
 185				scheduleWakeupCall(Config.PING_MAX_INTERVAL, true);
 186			} else if (account.getStatus() == Account.STATUS_OFFLINE) {
 187				resetSendingToWaiting(account);
 188				if (!account.isOptionSet(Account.OPTION_DISABLED)) {
 189					int timeToReconnect = mRandom.nextInt(50) + 10;
 190					scheduleWakeupCall(timeToReconnect, false);
 191				}
 192			} else if (account.getStatus() == Account.STATUS_REGISTRATION_SUCCESSFULL) {
 193				databaseBackend.updateAccount(account);
 194				reconnectAccount(account, true);
 195			} else if ((account.getStatus() != Account.STATUS_CONNECTING)
 196					&& (account.getStatus() != Account.STATUS_NO_INTERNET)) {
 197				if (connection != null) {
 198					int next = connection.getTimeToNextAttempt();
 199					Log.d(Config.LOGTAG, account.getJid().toBareJid()
 200							+ ": error connecting account. try again in "
 201							+ next + "s for the "
 202							+ (connection.getAttempt() + 1) + " time");
 203					scheduleWakeupCall((int) (next * 1.2), false);
 204				}
 205			}
 206			UIHelper.showErrorNotification(getApplicationContext(),
 207					getAccounts());
 208		}
 209	};
 210	private Integer accountChangedListenerCount = 0;
 211	private OnRosterUpdate mOnRosterUpdate = null;
 212	private Integer rosterChangedListenerCount = 0;
 213	private SecureRandom mRandom;
 214	private FileObserver fileObserver = new FileObserver(
 215			FileBackend.getConversationsImageDirectory()) {
 216
 217		@Override
 218		public void onEvent(int event, String path) {
 219			if (event == FileObserver.DELETE) {
 220				markFileDeleted(path.split("\\.")[0]);
 221			}
 222		}
 223	};
 224	private OnJinglePacketReceived jingleListener = new OnJinglePacketReceived() {
 225
 226		@Override
 227		public void onJinglePacketReceived(Account account, JinglePacket packet) {
 228			mJingleConnectionManager.deliverPacket(account, packet);
 229		}
 230	};
 231
 232	private OpenPgpServiceConnection pgpServiceConnection;
 233	private PgpEngine mPgpEngine = null;
 234	private Intent pingIntent;
 235	private PendingIntent pendingPingIntent = null;
 236	private WakeLock wakeLock;
 237	private PowerManager pm;
 238	private OnBindListener mOnBindListener = new OnBindListener() {
 239
 240		@Override
 241		public void onBind(final Account account) {
 242			account.getRoster().clearPresences();
 243			account.clearPresences(); // self presences
 244			account.pendingConferenceJoins.clear();
 245			account.pendingConferenceLeaves.clear();
 246			fetchRosterFromServer(account);
 247			fetchBookmarks(account);
 248			sendPresencePacket(account,
 249					mPresenceGenerator.sendPresence(account));
 250			connectMultiModeConversations(account);
 251			updateConversationUi();
 252		}
 253	};
 254
 255	private OnMessageAcknowledged mOnMessageAcknowledgedListener = new OnMessageAcknowledged() {
 256
 257		@Override
 258		public void onMessageAcknowledged(Account account, String uuid) {
 259			for (Conversation conversation : getConversations()) {
 260				if (conversation.getAccount() == account) {
 261					for (Message message : conversation.getMessages()) {
 262						if ((message.getStatus() == Message.STATUS_UNSEND || message
 263								.getStatus() == Message.STATUS_WAITING)
 264								&& message.getUuid().equals(uuid)) {
 265							markMessage(message, Message.STATUS_SEND);
 266							return;
 267						}
 268					}
 269				}
 270			}
 271		}
 272	};
 273	private LruCache<String, Bitmap> mBitmapCache;
 274	private OnRenameListener renameListener = null;
 275	private IqGenerator mIqGenerator = new IqGenerator(this);
 276
 277	public PgpEngine getPgpEngine() {
 278		if (pgpServiceConnection.isBound()) {
 279			if (this.mPgpEngine == null) {
 280				this.mPgpEngine = new PgpEngine(new OpenPgpApi(
 281						getApplicationContext(),
 282						pgpServiceConnection.getService()), this);
 283			}
 284			return mPgpEngine;
 285		} else {
 286			return null;
 287		}
 288
 289	}
 290
 291	public FileBackend getFileBackend() {
 292		return this.fileBackend;
 293	}
 294
 295	public AvatarService getAvatarService() {
 296		return this.mAvatarService;
 297	}
 298
 299	public void attachFileToConversation(Conversation conversation, 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.setCounterpart(conversation.getNextCounterpart());
 309		message.setType(Message.TYPE_FILE);
 310		message.setStatus(Message.STATUS_OFFERED);
 311		String path = getFileBackend().getOriginalPath(uri);
 312		if (path!=null) {
 313			message.setRelativeFilePath(path);
 314			getFileBackend().updateFileParams(message);
 315			if (message.getEncryption() == Message.ENCRYPTION_DECRYPTED) {
 316				getPgpEngine().encrypt(message, callback);
 317			} else {
 318				callback.success(message);
 319			}
 320		} else {
 321			new Thread(new Runnable() {
 322				@Override
 323				public void run() {
 324					try {
 325						getFileBackend().copyFileToPrivateStorage(message, uri);
 326						getFileBackend().updateFileParams(message);
 327						if (message.getEncryption() == Message.ENCRYPTION_DECRYPTED) {
 328							getPgpEngine().encrypt(message, callback);
 329						} else {
 330							callback.success(message);
 331						}
 332					} catch (FileBackend.FileCopyException e) {
 333						callback.error(e.getResId(),message);
 334					}
 335				}
 336			}).start();
 337
 338		}
 339	}
 340
 341	public void attachImageToConversation(final Conversation conversation,
 342											 final Uri uri, final UiCallback<Message> callback) {
 343		final Message message;
 344		if (conversation.getNextEncryption(forceEncryption()) == Message.ENCRYPTION_PGP) {
 345			message = new Message(conversation, "",
 346					Message.ENCRYPTION_DECRYPTED);
 347		} else {
 348			message = new Message(conversation, "",
 349					conversation.getNextEncryption(forceEncryption()));
 350		}
 351		message.setCounterpart(conversation.getNextCounterpart());
 352		message.setType(Message.TYPE_IMAGE);
 353		message.setStatus(Message.STATUS_OFFERED);
 354		new Thread(new Runnable() {
 355
 356			@Override
 357			public void run() {
 358				try {
 359					DownloadableFile file = getFileBackend().copyImageToPrivateStorage(message, uri);
 360					if (conversation.getNextEncryption(forceEncryption()) == Message.ENCRYPTION_PGP) {
 361						getPgpEngine().encrypt(message, callback);
 362					} else {
 363						callback.success(message);
 364					}
 365				} catch (FileBackend.FileCopyException e) {
 366					callback.error(e.getResId(), message);
 367				}
 368			}
 369		}).start();
 370	}
 371
 372	public Conversation find(Bookmark bookmark) {
 373		return find(bookmark.getAccount(), bookmark.getJid());
 374	}
 375
 376	public Conversation find(final Account account, final Jid jid) {
 377		return find(getConversations(), account, jid);
 378	}
 379
 380	@Override
 381	public int onStartCommand(Intent intent, int flags, int startId) {
 382		if (intent != null && intent.getAction() != null) {
 383			if (intent.getAction().equals(ACTION_MERGE_PHONE_CONTACTS)) {
 384				mergePhoneContactsWithRoster();
 385				return START_STICKY;
 386			} else if (intent.getAction().equals(Intent.ACTION_SHUTDOWN)) {
 387				logoutAndSave();
 388				return START_NOT_STICKY;
 389			} else if (intent.getAction().equals(ACTION_CLEAR_NOTIFICATION)) {
 390				mNotificationService.clear();
 391			}
 392		}
 393		this.wakeLock.acquire();
 394
 395		for (Account account : accounts) {
 396			if (!account.isOptionSet(Account.OPTION_DISABLED)) {
 397				if (!hasInternetConnection()) {
 398					account.setStatus(Account.STATUS_NO_INTERNET);
 399					if (statusListener != null) {
 400						statusListener.onStatusChanged(account);
 401					}
 402				} else {
 403					if (account.getStatus() == Account.STATUS_NO_INTERNET) {
 404						account.setStatus(Account.STATUS_OFFLINE);
 405						if (statusListener != null) {
 406							statusListener.onStatusChanged(account);
 407						}
 408					}
 409					if (account.getStatus() == Account.STATUS_ONLINE) {
 410						long lastReceived = account.getXmppConnection()
 411								.getLastPacketReceived();
 412						long lastSent = account.getXmppConnection()
 413								.getLastPingSent();
 414						if (lastSent - lastReceived >= Config.PING_TIMEOUT * 1000) {
 415							Log.d(Config.LOGTAG, account.getJid()
 416									+ ": ping timeout");
 417							this.reconnectAccount(account, true);
 418						} else if (SystemClock.elapsedRealtime() - lastReceived >= Config.PING_MIN_INTERVAL * 1000) {
 419							account.getXmppConnection().sendPing();
 420							this.scheduleWakeupCall(2, false);
 421						}
 422					} else if (account.getStatus() == Account.STATUS_OFFLINE) {
 423						if (account.getXmppConnection() == null) {
 424							account.setXmppConnection(this
 425									.createConnection(account));
 426						}
 427						new Thread(account.getXmppConnection()).start();
 428					} else if ((account.getStatus() == Account.STATUS_CONNECTING)
 429							&& ((SystemClock.elapsedRealtime() - account
 430							.getXmppConnection().getLastConnect()) / 1000 >= Config.CONNECT_TIMEOUT)) {
 431						Log.d(Config.LOGTAG, account.getJid()
 432								+ ": time out during connect reconnecting");
 433						reconnectAccount(account, true);
 434					} else {
 435						if (account.getXmppConnection().getTimeToNextAttempt() <= 0) {
 436							reconnectAccount(account, true);
 437						}
 438					}
 439					// in any case. reschedule wakup call
 440					this.scheduleWakeupCall(Config.PING_MAX_INTERVAL, true);
 441				}
 442				if (mOnAccountUpdate != null) {
 443					mOnAccountUpdate.onAccountUpdate();
 444				}
 445			}
 446		}
 447		/*PowerManager pm = (PowerManager) this.getSystemService(Context.POWER_SERVICE);
 448		if (!pm.isScreenOn()) {
 449			removeStaleListeners();
 450		}*/
 451		if (wakeLock.isHeld()) {
 452			try {
 453				wakeLock.release();
 454			} catch (final RuntimeException ignored) {
 455			}
 456		}
 457		return START_STICKY;
 458	}
 459
 460	public boolean hasInternetConnection() {
 461		ConnectivityManager cm = (ConnectivityManager) getApplicationContext()
 462				.getSystemService(Context.CONNECTIVITY_SERVICE);
 463		NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
 464		return activeNetwork != null && activeNetwork.isConnected();
 465	}
 466
 467	@SuppressLint("TrulyRandom")
 468	@Override
 469	public void onCreate() {
 470		ExceptionHelper.init(getApplicationContext());
 471		PRNGFixes.apply();
 472		this.mRandom = new SecureRandom();
 473		this.mMemorizingTrustManager = new MemorizingTrustManager(
 474				getApplicationContext());
 475
 476		int maxMemory = (int) (Runtime.getRuntime().maxMemory() / 1024);
 477		int cacheSize = maxMemory / 8;
 478		this.mBitmapCache = new LruCache<String, Bitmap>(cacheSize) {
 479			@Override
 480			protected int sizeOf(String key, Bitmap bitmap) {
 481				return bitmap.getByteCount() / 1024;
 482			}
 483		};
 484
 485		this.databaseBackend = DatabaseBackend
 486				.getInstance(getApplicationContext());
 487		this.accounts = databaseBackend.getAccounts();
 488
 489		for (Account account : this.accounts) {
 490			this.databaseBackend.readRoster(account.getRoster());
 491		}
 492		this.mergePhoneContactsWithRoster();
 493		this.getConversations();
 494
 495		getContentResolver().registerContentObserver(
 496				ContactsContract.Contacts.CONTENT_URI, true, contactObserver);
 497		this.fileObserver.startWatching();
 498		this.pgpServiceConnection = new OpenPgpServiceConnection(
 499				getApplicationContext(), "org.sufficientlysecure.keychain");
 500		this.pgpServiceConnection.bindToService();
 501
 502		this.pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
 503		this.wakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK,
 504				"XmppConnectionService");
 505	}
 506
 507	@Override
 508	public void onDestroy() {
 509		super.onDestroy();
 510		this.logoutAndSave();
 511	}
 512
 513	@Override
 514	public void onTaskRemoved(Intent rootIntent) {
 515		super.onTaskRemoved(rootIntent);
 516		this.logoutAndSave();
 517	}
 518
 519	private void logoutAndSave() {
 520		for (Account account : accounts) {
 521			databaseBackend.writeRoster(account.getRoster());
 522			if (account.getXmppConnection() != null) {
 523				disconnect(account, false);
 524			}
 525		}
 526		Context context = getApplicationContext();
 527		AlarmManager alarmManager = (AlarmManager) context
 528				.getSystemService(Context.ALARM_SERVICE);
 529		Intent intent = new Intent(context, EventReceiver.class);
 530		alarmManager.cancel(PendingIntent.getBroadcast(context, 0, intent, 0));
 531		Log.d(Config.LOGTAG, "good bye");
 532		stopSelf();
 533	}
 534
 535	protected void scheduleWakeupCall(int seconds, boolean ping) {
 536		long timeToWake = SystemClock.elapsedRealtime() + seconds * 1000;
 537		Context context = getApplicationContext();
 538		AlarmManager alarmManager = (AlarmManager) context
 539				.getSystemService(Context.ALARM_SERVICE);
 540
 541		if (ping) {
 542			if (this.pingIntent == null) {
 543				this.pingIntent = new Intent(context, EventReceiver.class);
 544				this.pingIntent.setAction("ping");
 545				this.pingIntent.putExtra("time", timeToWake);
 546				this.pendingPingIntent = PendingIntent.getBroadcast(context, 0,
 547						this.pingIntent, 0);
 548				alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP,
 549						timeToWake, pendingPingIntent);
 550			} else {
 551				long scheduledTime = this.pingIntent.getLongExtra("time", 0);
 552				if (scheduledTime < SystemClock.elapsedRealtime()
 553						|| (scheduledTime > timeToWake)) {
 554					this.pingIntent.putExtra("time", timeToWake);
 555					alarmManager.cancel(this.pendingPingIntent);
 556					this.pendingPingIntent = PendingIntent.getBroadcast(
 557							context, 0, this.pingIntent, 0);
 558					alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP,
 559							timeToWake, pendingPingIntent);
 560				}
 561			}
 562		} else {
 563			Intent intent = new Intent(context, EventReceiver.class);
 564			intent.setAction("ping_check");
 565			PendingIntent alarmIntent = PendingIntent.getBroadcast(context, 0,
 566					intent, 0);
 567			alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP, timeToWake,
 568					alarmIntent);
 569		}
 570
 571	}
 572
 573	public XmppConnection createConnection(Account account) {
 574		SharedPreferences sharedPref = getPreferences();
 575		account.setResource(sharedPref.getString("resource", "mobile")
 576				.toLowerCase(Locale.getDefault()));
 577		XmppConnection connection = new XmppConnection(account, this);
 578		connection.setOnMessagePacketReceivedListener(this.mMessageParser);
 579		connection.setOnStatusChangedListener(this.statusListener);
 580		connection.setOnPresencePacketReceivedListener(this.mPresenceParser);
 581		connection.setOnUnregisteredIqPacketReceivedListener(this.mIqParser);
 582		connection.setOnJinglePacketReceivedListener(this.jingleListener);
 583		connection.setOnBindListener(this.mOnBindListener);
 584		connection
 585				.setOnMessageAcknowledgeListener(this.mOnMessageAcknowledgedListener);
 586		return connection;
 587	}
 588
 589	public void sendMessage(Message message) {
 590		Account account = message.getConversation().getAccount();
 591		account.deactivateGracePeriod();
 592		Conversation conv = message.getConversation();
 593		MessagePacket packet = null;
 594		boolean saveInDb = true;
 595		boolean send = false;
 596		if (account.getStatus() == Account.STATUS_ONLINE
 597				&& account.getXmppConnection() != null) {
 598			if (message.getType() == Message.TYPE_IMAGE || message.getType() == Message.TYPE_FILE) {
 599				if (message.getCounterpart() != null) {
 600					if (message.getEncryption() == Message.ENCRYPTION_OTR) {
 601						if (!conv.hasValidOtrSession()) {
 602							conv.startOtrSession(this, message.getCounterpart().getResourcepart(),
 603									true);
 604							message.setStatus(Message.STATUS_WAITING);
 605						} else if (conv.hasValidOtrSession()
 606								&& conv.getOtrSession().getSessionStatus() == SessionStatus.ENCRYPTED) {
 607							mJingleConnectionManager
 608									.createNewConnection(message);
 609						}
 610					} else {
 611						mJingleConnectionManager.createNewConnection(message);
 612					}
 613				} else {
 614					if (message.getEncryption() == Message.ENCRYPTION_OTR) {
 615						conv.startOtrIfNeeded();
 616					}
 617					message.setStatus(Message.STATUS_WAITING);
 618				}
 619			} else {
 620				if (message.getEncryption() == Message.ENCRYPTION_OTR) {
 621					if (!conv.hasValidOtrSession() && (message.getCounterpart() != null)) {
 622						conv.startOtrSession(this, message.getCounterpart().getResourcepart(), true);
 623						message.setStatus(Message.STATUS_WAITING);
 624					} else if (conv.hasValidOtrSession()) {
 625						if (conv.getOtrSession().getSessionStatus() == SessionStatus.ENCRYPTED) {
 626							packet = mMessageGenerator.generateOtrChat(message);
 627							send = true;
 628						} else {
 629							message.setStatus(Message.STATUS_WAITING);
 630							conv.startOtrIfNeeded();
 631						}
 632					} else {
 633						message.setStatus(Message.STATUS_WAITING);
 634					}
 635				} else if (message.getEncryption() == Message.ENCRYPTION_DECRYPTED) {
 636					message.getConversation().endOtrIfNeeded();
 637					failWaitingOtrMessages(message.getConversation());
 638					packet = mMessageGenerator.generatePgpChat(message);
 639					send = true;
 640				} else {
 641					message.getConversation().endOtrIfNeeded();
 642					failWaitingOtrMessages(message.getConversation());
 643					packet = mMessageGenerator.generateChat(message);
 644					send = true;
 645				}
 646			}
 647			if (!account.getXmppConnection().getFeatures().sm()
 648					&& conv.getMode() != Conversation.MODE_MULTI) {
 649				message.setStatus(Message.STATUS_SEND);
 650			}
 651		} else {
 652			message.setStatus(Message.STATUS_WAITING);
 653			if (message.getType() == Message.TYPE_TEXT) {
 654				if (message.getEncryption() == Message.ENCRYPTION_DECRYPTED) {
 655					String pgpBody = message.getEncryptedBody();
 656					String decryptedBody = message.getBody();
 657					message.setBody(pgpBody);
 658					message.setEncryption(Message.ENCRYPTION_PGP);
 659					databaseBackend.createMessage(message);
 660					saveInDb = false;
 661					message.setBody(decryptedBody);
 662					message.setEncryption(Message.ENCRYPTION_DECRYPTED);
 663				} else if (message.getEncryption() == Message.ENCRYPTION_OTR) {
 664					if (!conv.hasValidOtrSession()
 665							&& message.getCounterpart() != null) {
 666						conv.startOtrSession(this, message.getCounterpart().getResourcepart(), false);
 667					}
 668				}
 669			}
 670
 671		}
 672		conv.add(message);
 673		if (saveInDb) {
 674			if (message.getEncryption() == Message.ENCRYPTION_NONE
 675					|| saveEncryptedMessages()) {
 676				databaseBackend.createMessage(message);
 677			}
 678		}
 679		if ((send) && (packet != null)) {
 680			sendMessagePacket(account, packet);
 681		}
 682		updateConversationUi();
 683	}
 684
 685	private void sendUnsendMessages(Conversation conversation) {
 686		for (int i = 0; i < conversation.getMessages().size(); ++i) {
 687			int status = conversation.getMessages().get(i).getStatus();
 688			if (status == Message.STATUS_WAITING) {
 689				resendMessage(conversation.getMessages().get(i));
 690			}
 691		}
 692	}
 693
 694	private void resendMessage(Message message) {
 695		Account account = message.getConversation().getAccount();
 696		MessagePacket packet = null;
 697		if (message.getEncryption() == Message.ENCRYPTION_OTR) {
 698			Presences presences = message.getConversation().getContact()
 699					.getPresences();
 700			if (!message.getConversation().hasValidOtrSession()) {
 701				if ((message.getCounterpart() != null)
 702						&& (presences.has(message.getCounterpart().getResourcepart()))) {
 703					message.getConversation().startOtrSession(this,
 704							message.getCounterpart().getResourcepart(), true);
 705				} else {
 706					if (presences.size() == 1) {
 707						String presence = presences.asStringArray()[0];
 708						message.getConversation().startOtrSession(this,
 709								presence, true);
 710					}
 711				}
 712			} else {
 713				if (message.getConversation().getOtrSession()
 714						.getSessionStatus() == SessionStatus.ENCRYPTED) {
 715					try {
 716						message.setCounterpart(Jid.fromSessionID(message.getConversation().getOtrSession().getSessionID()));
 717						if (message.getType() == Message.TYPE_TEXT) {
 718							packet = mMessageGenerator.generateOtrChat(message,
 719									true);
 720						} else if (message.getType() == Message.TYPE_IMAGE || message.getType() == Message.TYPE_FILE) {
 721							mJingleConnectionManager.createNewConnection(message);
 722						}
 723					} catch (InvalidJidException e) {
 724
 725					}
 726				}
 727			}
 728		} else if (message.getType() == Message.TYPE_TEXT) {
 729			if (message.getEncryption() == Message.ENCRYPTION_NONE) {
 730				packet = mMessageGenerator.generateChat(message, true);
 731			} else if ((message.getEncryption() == Message.ENCRYPTION_DECRYPTED)
 732					|| (message.getEncryption() == Message.ENCRYPTION_PGP)) {
 733				packet = mMessageGenerator.generatePgpChat(message, true);
 734			}
 735		} else if (message.getType() == Message.TYPE_IMAGE || message.getType() == Message.TYPE_FILE) {
 736			Contact contact = message.getConversation().getContact();
 737			Presences presences = contact.getPresences();
 738			if ((message.getCounterpart() != null)
 739					&& (presences.has(message.getCounterpart().getResourcepart()))) {
 740				markMessage(message, Message.STATUS_OFFERED);
 741				mJingleConnectionManager.createNewConnection(message);
 742			} else {
 743				if (presences.size() == 1) {
 744					String presence = presences.asStringArray()[0];
 745					try {
 746						message.setCounterpart(Jid.fromParts(contact.getJid().getLocalpart(), contact.getJid().getDomainpart(), presence));
 747					} catch (InvalidJidException e) {
 748						return;
 749					}
 750					markMessage(message, Message.STATUS_OFFERED);
 751					mJingleConnectionManager.createNewConnection(message);
 752				}
 753			}
 754		}
 755		if (packet != null) {
 756			if (!account.getXmppConnection().getFeatures().sm()
 757					&& message.getConversation().getMode() != Conversation.MODE_MULTI) {
 758				markMessage(message, Message.STATUS_SEND);
 759			} else {
 760				markMessage(message, Message.STATUS_UNSEND);
 761			}
 762			sendMessagePacket(account, packet);
 763		}
 764	}
 765
 766	public void fetchRosterFromServer(Account account) {
 767		IqPacket iqPacket = new IqPacket(IqPacket.TYPE_GET);
 768		if (!"".equals(account.getRosterVersion())) {
 769			Log.d(Config.LOGTAG, account.getJid().toBareJid()
 770					+ ": fetching roster version " + account.getRosterVersion());
 771		} else {
 772			Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": fetching roster");
 773		}
 774		iqPacket.query("jabber:iq:roster").setAttribute("ver",
 775				account.getRosterVersion());
 776		account.getXmppConnection().sendIqPacket(iqPacket,
 777				new OnIqPacketReceived() {
 778
 779					@Override
 780					public void onIqPacketReceived(final Account account,
 781												   IqPacket packet) {
 782						Element query = packet.findChild("query");
 783						if (query != null) {
 784							account.getRoster().markAllAsNotInRoster();
 785							mIqParser.rosterItems(account, query);
 786						}
 787					}
 788				});
 789	}
 790
 791	public void fetchBookmarks(Account account) {
 792		IqPacket iqPacket = new IqPacket(IqPacket.TYPE_GET);
 793		Element query = iqPacket.query("jabber:iq:private");
 794		query.addChild("storage", "storage:bookmarks");
 795		OnIqPacketReceived callback = new OnIqPacketReceived() {
 796
 797			@Override
 798			public void onIqPacketReceived(Account account, IqPacket packet) {
 799				Element query = packet.query();
 800				List<Bookmark> bookmarks = new CopyOnWriteArrayList<>();
 801				Element storage = query.findChild("storage",
 802						"storage:bookmarks");
 803				if (storage != null) {
 804					for (Element item : storage.getChildren()) {
 805						if (item.getName().equals("conference")) {
 806							Bookmark bookmark = Bookmark.parse(item, account);
 807							bookmarks.add(bookmark);
 808							Conversation conversation = find(bookmark);
 809							if (conversation != null) {
 810								conversation.setBookmark(bookmark);
 811							} else {
 812								if (bookmark.autojoin()) {
 813									conversation = findOrCreateConversation(
 814											account, bookmark.getJid(), true);
 815									conversation.setBookmark(bookmark);
 816									joinMuc(conversation);
 817								}
 818							}
 819						}
 820					}
 821				}
 822				account.setBookmarks(bookmarks);
 823			}
 824		};
 825		sendIqPacket(account, iqPacket, callback);
 826
 827	}
 828
 829	public void pushBookmarks(Account account) {
 830		IqPacket iqPacket = new IqPacket(IqPacket.TYPE_SET);
 831		Element query = iqPacket.query("jabber:iq:private");
 832		Element storage = query.addChild("storage", "storage:bookmarks");
 833		for (Bookmark bookmark : account.getBookmarks()) {
 834			storage.addChild(bookmark);
 835		}
 836		sendIqPacket(account, iqPacket, null);
 837	}
 838
 839	private void mergePhoneContactsWithRoster() {
 840		PhoneHelper.loadPhoneContacts(getApplicationContext(),
 841				new OnPhoneContactsLoadedListener() {
 842					@Override
 843					public void onPhoneContactsLoaded(List<Bundle> phoneContacts) {
 844						for (Account account : accounts) {
 845							account.getRoster().clearSystemAccounts();
 846						}
 847						for (Bundle phoneContact : phoneContacts) {
 848							for (Account account : accounts) {
 849								Jid jid;
 850								try {
 851									jid = Jid.fromString(phoneContact.getString("jid"));
 852								} catch (final InvalidJidException e) {
 853									// TODO: Warn if contact import fails here?
 854									break;
 855								}
 856								final Contact contact = account.getRoster()
 857										.getContact(jid);
 858								String systemAccount = phoneContact
 859										.getInt("phoneid")
 860										+ "#"
 861										+ phoneContact.getString("lookup");
 862								contact.setSystemAccount(systemAccount);
 863								contact.setPhotoUri(phoneContact
 864										.getString("photouri"));
 865								contact.setSystemName(phoneContact
 866										.getString("displayname"));
 867								getAvatarService().clear(contact);
 868							}
 869						}
 870					}
 871				});
 872	}
 873
 874	public List<Conversation> getConversations() {
 875		if (this.conversations == null) {
 876			Hashtable<String, Account> accountLookupTable = new Hashtable<>();
 877			for (Account account : this.accounts) {
 878				accountLookupTable.put(account.getUuid(), account);
 879			}
 880			this.conversations = databaseBackend
 881					.getConversations(Conversation.STATUS_AVAILABLE);
 882			for (Conversation conv : this.conversations) {
 883				Account account = accountLookupTable.get(conv.getAccountUuid());
 884				conv.setAccount(account);
 885				conv.setMessages(databaseBackend.getMessages(conv, 50));
 886				checkDeletedFiles(conv);
 887			}
 888		}
 889		return this.conversations;
 890	}
 891
 892	private void checkDeletedFiles(Conversation conversation) {
 893		for (Message message : conversation.getMessages()) {
 894			if ((message.getType() == Message.TYPE_IMAGE || message.getType() == Message.TYPE_FILE)
 895					&& message.getEncryption() != Message.ENCRYPTION_PGP) {
 896				if (!getFileBackend().isFileAvailable(message)) {
 897					message.setDownloadable(new DownloadablePlaceholder(Downloadable.STATUS_DELETED));
 898				}
 899			}
 900		}
 901	}
 902
 903	private void markFileDeleted(String uuid) {
 904		for (Conversation conversation : getConversations()) {
 905			for (Message message : conversation.getMessages()) {
 906				if (message.getType() == Message.TYPE_IMAGE
 907						&& message.getEncryption() != Message.ENCRYPTION_PGP
 908						&& message.getUuid().equals(uuid)) {
 909					if (!getFileBackend().isFileAvailable(message)) {
 910						message.setDownloadable(new DownloadablePlaceholder(Downloadable.STATUS_DELETED));
 911						updateConversationUi();
 912					}
 913					return;
 914				}
 915			}
 916		}
 917	}
 918
 919	public void populateWithOrderedConversations(List<Conversation> list) {
 920		populateWithOrderedConversations(list, true);
 921	}
 922
 923	public void populateWithOrderedConversations(List<Conversation> list,
 924												 boolean includeConferences) {
 925		list.clear();
 926		if (includeConferences) {
 927			list.addAll(getConversations());
 928		} else {
 929			for (Conversation conversation : getConversations()) {
 930				if (conversation.getMode() == Conversation.MODE_SINGLE) {
 931					list.add(conversation);
 932				}
 933			}
 934		}
 935		Collections.sort(list, new Comparator<Conversation>() {
 936			@Override
 937			public int compare(Conversation lhs, Conversation rhs) {
 938				Message left = lhs.getLatestMessage();
 939				Message right = rhs.getLatestMessage();
 940				if (left.getTimeSent() > right.getTimeSent()) {
 941					return -1;
 942				} else if (left.getTimeSent() < right.getTimeSent()) {
 943					return 1;
 944				} else {
 945					return 0;
 946				}
 947			}
 948		});
 949	}
 950
 951	public int loadMoreMessages(Conversation conversation, long timestamp) {
 952		List<Message> messages = databaseBackend.getMessages(conversation, 50,
 953				timestamp);
 954		for (Message message : messages) {
 955			message.setConversation(conversation);
 956		}
 957		conversation.addAll(0, messages);
 958		return messages.size();
 959	}
 960
 961	public List<Account> getAccounts() {
 962		return this.accounts;
 963	}
 964
 965	public Conversation find(List<Conversation> haystack, Contact contact) {
 966		for (Conversation conversation : haystack) {
 967			if (conversation.getContact() == contact) {
 968				return conversation;
 969			}
 970		}
 971		return null;
 972	}
 973
 974	public Conversation find(final List<Conversation> haystack,
 975							 final Account account,
 976							 final Jid jid) {
 977		for (Conversation conversation : haystack) {
 978			if ((account == null || conversation.getAccount() == account)
 979					&& (conversation.getContactJid().toBareJid().equals(jid.toBareJid()))) {
 980				return conversation;
 981			}
 982		}
 983		return null;
 984	}
 985
 986	public Conversation findOrCreateConversation(final Account account, final Jid jid,
 987												 final boolean muc) {
 988		Conversation conversation = find(account, jid);
 989		if (conversation != null) {
 990			return conversation;
 991		}
 992		conversation = databaseBackend.findConversation(account, jid);
 993		if (conversation != null) {
 994			conversation.setStatus(Conversation.STATUS_AVAILABLE);
 995			conversation.setAccount(account);
 996			if (muc) {
 997				conversation.setMode(Conversation.MODE_MULTI);
 998			} else {
 999				conversation.setMode(Conversation.MODE_SINGLE);
1000			}
1001			conversation.setMessages(databaseBackend.getMessages(conversation,
1002					50));
1003			this.databaseBackend.updateConversation(conversation);
1004		} else {
1005			String conversationName;
1006			Contact contact = account.getRoster().getContact(jid);
1007			if (contact != null) {
1008				conversationName = contact.getDisplayName();
1009			} else {
1010				conversationName = jid.getLocalpart();
1011			}
1012			if (muc) {
1013				conversation = new Conversation(conversationName, account, jid,
1014						Conversation.MODE_MULTI);
1015			} else {
1016				conversation = new Conversation(conversationName, account, jid,
1017						Conversation.MODE_SINGLE);
1018			}
1019			this.databaseBackend.createConversation(conversation);
1020		}
1021		this.conversations.add(conversation);
1022		updateConversationUi();
1023		return conversation;
1024	}
1025
1026	public void archiveConversation(Conversation conversation) {
1027		if (conversation.getMode() == Conversation.MODE_MULTI) {
1028			if (conversation.getAccount().getStatus() == Account.STATUS_ONLINE) {
1029				Bookmark bookmark = conversation.getBookmark();
1030				if (bookmark != null && bookmark.autojoin()) {
1031					bookmark.setAutojoin(false);
1032					pushBookmarks(bookmark.getAccount());
1033				}
1034			}
1035			leaveMuc(conversation);
1036		} else {
1037			conversation.endOtrIfNeeded();
1038		}
1039		this.databaseBackend.updateConversation(conversation);
1040		this.conversations.remove(conversation);
1041		updateConversationUi();
1042	}
1043
1044	public void clearConversationHistory(Conversation conversation) {
1045		this.databaseBackend.deleteMessagesInConversation(conversation);
1046		conversation.getMessages().clear();
1047		updateConversationUi();
1048	}
1049
1050	public int getConversationCount() {
1051		return this.databaseBackend.getConversationCount();
1052	}
1053
1054	public void createAccount(Account account) {
1055		databaseBackend.createAccount(account);
1056		this.accounts.add(account);
1057		this.reconnectAccount(account, false);
1058		updateAccountUi();
1059	}
1060
1061	public void updateAccount(Account account) {
1062		this.statusListener.onStatusChanged(account);
1063		databaseBackend.updateAccount(account);
1064		reconnectAccount(account, false);
1065		updateAccountUi();
1066		UIHelper.showErrorNotification(getApplicationContext(), getAccounts());
1067	}
1068
1069	public void deleteAccount(Account account) {
1070		for (Conversation conversation : conversations) {
1071			if (conversation.getAccount() == account) {
1072				if (conversation.getMode() == Conversation.MODE_MULTI) {
1073					leaveMuc(conversation);
1074				} else if (conversation.getMode() == Conversation.MODE_SINGLE) {
1075					conversation.endOtrIfNeeded();
1076				}
1077				conversations.remove(conversation);
1078			}
1079		}
1080		if (account.getXmppConnection() != null) {
1081			this.disconnect(account, true);
1082		}
1083		databaseBackend.deleteAccount(account);
1084		this.accounts.remove(account);
1085		updateAccountUi();
1086		UIHelper.showErrorNotification(getApplicationContext(), getAccounts());
1087	}
1088
1089	private void removeStaleListeners() {
1090		boolean removedListener = false;
1091		synchronized (this.convChangedListenerCount) {
1092			if (this.mOnConversationUpdate != null) {
1093				this.mOnConversationUpdate = null;
1094				this.convChangedListenerCount = 0;
1095				this.mNotificationService.setIsInForeground(false);
1096				removedListener = true;
1097			}
1098		}
1099		synchronized (this.accountChangedListenerCount) {
1100			if (this.mOnAccountUpdate != null) {
1101				this.mOnAccountUpdate = null;
1102				this.accountChangedListenerCount = 0;
1103				removedListener = true;
1104			}
1105		}
1106		synchronized (this.rosterChangedListenerCount) {
1107			if (this.mOnRosterUpdate != null) {
1108				this.mOnRosterUpdate = null;
1109				this.rosterChangedListenerCount = 0;
1110				removedListener = true;
1111			}
1112		}
1113		if (removedListener) {
1114			final String msg = "removed stale listeners";
1115			Log.d(Config.LOGTAG, msg);
1116			checkListeners();
1117			try {
1118				OutputStream os = openFileOutput("stacktrace.txt", MODE_PRIVATE);
1119				os.write(msg.getBytes());
1120				os.flush();
1121				os.close();
1122			} catch (final FileNotFoundException ignored) {
1123
1124			} catch (final IOException ignored) {
1125			}
1126		}
1127	}
1128
1129	public void setOnConversationListChangedListener(
1130			OnConversationUpdate listener) {
1131		/*if (!isScreenOn()) {
1132			Log.d(Config.LOGTAG,
1133					"ignoring setOnConversationListChangedListener");
1134			return;
1135		}*/
1136		synchronized (this.convChangedListenerCount) {
1137			if (checkListeners()) {
1138				switchToForeground();
1139			}
1140			this.mOnConversationUpdate = listener;
1141			this.mNotificationService.setIsInForeground(true);
1142			this.convChangedListenerCount++;
1143		}
1144	}
1145
1146	public void removeOnConversationListChangedListener() {
1147		synchronized (this.convChangedListenerCount) {
1148			this.convChangedListenerCount--;
1149			if (this.convChangedListenerCount <= 0) {
1150				this.convChangedListenerCount = 0;
1151				this.mOnConversationUpdate = null;
1152				this.mNotificationService.setIsInForeground(false);
1153				if (checkListeners()) {
1154					switchToBackground();
1155				}
1156			}
1157		}
1158	}
1159
1160	public void setOnAccountListChangedListener(OnAccountUpdate listener) {
1161		/*if (!isScreenOn()) {
1162			Log.d(Config.LOGTAG, "ignoring setOnAccountListChangedListener");
1163			return;
1164		}*/
1165		synchronized (this.accountChangedListenerCount) {
1166			if (checkListeners()) {
1167				switchToForeground();
1168			}
1169			this.mOnAccountUpdate = listener;
1170			this.accountChangedListenerCount++;
1171		}
1172	}
1173
1174	public void removeOnAccountListChangedListener() {
1175		synchronized (this.accountChangedListenerCount) {
1176			this.accountChangedListenerCount--;
1177			if (this.accountChangedListenerCount <= 0) {
1178				this.mOnAccountUpdate = null;
1179				this.accountChangedListenerCount = 0;
1180				if (checkListeners()) {
1181					switchToBackground();
1182				}
1183			}
1184		}
1185	}
1186
1187	public void setOnRosterUpdateListener(OnRosterUpdate listener) {
1188		/*if (!isScreenOn()) {
1189			Log.d(Config.LOGTAG, "ignoring setOnRosterUpdateListener");
1190			return;
1191		}*/
1192		synchronized (this.rosterChangedListenerCount) {
1193			if (checkListeners()) {
1194				switchToForeground();
1195			}
1196			this.mOnRosterUpdate = listener;
1197			this.rosterChangedListenerCount++;
1198		}
1199	}
1200
1201	public void removeOnRosterUpdateListener() {
1202		synchronized (this.rosterChangedListenerCount) {
1203			this.rosterChangedListenerCount--;
1204			if (this.rosterChangedListenerCount <= 0) {
1205				this.rosterChangedListenerCount = 0;
1206				this.mOnRosterUpdate = null;
1207				if (checkListeners()) {
1208					switchToBackground();
1209				}
1210			}
1211		}
1212	}
1213
1214	private boolean checkListeners() {
1215		return (this.mOnAccountUpdate == null
1216				&& this.mOnConversationUpdate == null && this.mOnRosterUpdate == null);
1217	}
1218
1219	private void switchToForeground() {
1220		for (Account account : getAccounts()) {
1221			if (account.getStatus() == Account.STATUS_ONLINE) {
1222				XmppConnection connection = account.getXmppConnection();
1223				if (connection != null && connection.getFeatures().csi()) {
1224					connection.sendActive();
1225				}
1226			}
1227		}
1228		Log.d(Config.LOGTAG, "app switched into foreground");
1229	}
1230
1231	private void switchToBackground() {
1232		for (Account account : getAccounts()) {
1233			if (account.getStatus() == Account.STATUS_ONLINE) {
1234				XmppConnection connection = account.getXmppConnection();
1235				if (connection != null && connection.getFeatures().csi()) {
1236					connection.sendInactive();
1237				}
1238			}
1239		}
1240		this.mNotificationService.setIsInForeground(false);
1241		Log.d(Config.LOGTAG, "app switched into background");
1242	}
1243
1244	private boolean isScreenOn() {
1245		PowerManager pm = (PowerManager) this
1246				.getSystemService(Context.POWER_SERVICE);
1247		return pm.isScreenOn();
1248	}
1249
1250	public void connectMultiModeConversations(Account account) {
1251		List<Conversation> conversations = getConversations();
1252		for (Conversation conversation : conversations) {
1253			if ((conversation.getMode() == Conversation.MODE_MULTI)
1254					&& (conversation.getAccount() == account)) {
1255				joinMuc(conversation);
1256			}
1257		}
1258	}
1259
1260	public void joinMuc(Conversation conversation) {
1261		Account account = conversation.getAccount();
1262		account.pendingConferenceJoins.remove(conversation);
1263		account.pendingConferenceLeaves.remove(conversation);
1264		if (account.getStatus() == Account.STATUS_ONLINE) {
1265			Log.d(Config.LOGTAG,
1266					"joining conversation " + conversation.getContactJid());
1267			String nick = conversation.getMucOptions().getProposedNick();
1268			conversation.getMucOptions().setJoinNick(nick);
1269			PresencePacket packet = new PresencePacket();
1270			final Jid joinJid = conversation.getMucOptions().getJoinJid();
1271			packet.setTo(conversation.getMucOptions().getJoinJid());
1272			Element x = new Element("x");
1273			x.setAttribute("xmlns", "http://jabber.org/protocol/muc");
1274			if (conversation.getMucOptions().getPassword() != null) {
1275				Element password = x.addChild("password");
1276				password.setContent(conversation.getMucOptions().getPassword());
1277			}
1278			String sig = account.getPgpSignature();
1279			if (sig != null) {
1280				packet.addChild("status").setContent("online");
1281				packet.addChild("x", "jabber:x:signed").setContent(sig);
1282			}
1283			if (conversation.getMessages().size() != 0) {
1284				final SimpleDateFormat mDateFormat = new SimpleDateFormat(
1285						"yyyy-MM-dd'T'HH:mm:ss.SSS'Z'", Locale.US);
1286				mDateFormat.setTimeZone(TimeZone.getTimeZone("UTC"));
1287				Date date = new Date(conversation.getLatestMessage()
1288						.getTimeSent() + 1000);
1289				x.addChild("history").setAttribute("since",
1290						mDateFormat.format(date));
1291			}
1292			packet.addChild(x);
1293			sendPresencePacket(account, packet);
1294			if (!joinJid.equals(conversation.getContactJid())) {
1295				conversation.setContactJid(joinJid);
1296				databaseBackend.updateConversation(conversation);
1297			}
1298		} else {
1299			account.pendingConferenceJoins.add(conversation);
1300		}
1301	}
1302
1303	public void setOnRenameListener(OnRenameListener listener) {
1304		this.renameListener = listener;
1305	}
1306
1307	public void providePasswordForMuc(Conversation conversation, String password) {
1308		if (conversation.getMode() == Conversation.MODE_MULTI) {
1309			conversation.getMucOptions().setPassword(password);
1310			if (conversation.getBookmark() != null) {
1311				conversation.getBookmark().setAutojoin(true);
1312				pushBookmarks(conversation.getAccount());
1313			}
1314			databaseBackend.updateConversation(conversation);
1315			joinMuc(conversation);
1316		}
1317	}
1318
1319	public void renameInMuc(final Conversation conversation, final String nick) {
1320		final MucOptions options = conversation.getMucOptions();
1321		options.setJoinNick(nick);
1322		if (options.online()) {
1323			Account account = conversation.getAccount();
1324			options.setOnRenameListener(new OnRenameListener() {
1325
1326				@Override
1327				public void onRename(boolean success) {
1328					if (renameListener != null) {
1329						renameListener.onRename(success);
1330					}
1331					if (success) {
1332						conversation.setContactJid(conversation.getMucOptions()
1333								.getJoinJid());
1334						databaseBackend.updateConversation(conversation);
1335						Bookmark bookmark = conversation.getBookmark();
1336						if (bookmark != null) {
1337							bookmark.setNick(nick);
1338							pushBookmarks(bookmark.getAccount());
1339						}
1340					}
1341				}
1342			});
1343			options.flagAboutToRename();
1344			PresencePacket packet = new PresencePacket();
1345			packet.setTo(options.getJoinJid());
1346			packet.setFrom(conversation.getAccount().getJid());
1347
1348			String sig = account.getPgpSignature();
1349			if (sig != null) {
1350				packet.addChild("status").setContent("online");
1351				packet.addChild("x", "jabber:x:signed").setContent(sig);
1352			}
1353			sendPresencePacket(account, packet);
1354		} else {
1355			conversation.setContactJid(options.getJoinJid());
1356			databaseBackend.updateConversation(conversation);
1357			if (conversation.getAccount().getStatus() == Account.STATUS_ONLINE) {
1358				Bookmark bookmark = conversation.getBookmark();
1359				if (bookmark != null) {
1360					bookmark.setNick(nick);
1361					pushBookmarks(bookmark.getAccount());
1362				}
1363				joinMuc(conversation);
1364			}
1365		}
1366	}
1367
1368	public void leaveMuc(Conversation conversation) {
1369		Account account = conversation.getAccount();
1370		account.pendingConferenceJoins.remove(conversation);
1371		account.pendingConferenceLeaves.remove(conversation);
1372		if (account.getStatus() == Account.STATUS_ONLINE) {
1373			PresencePacket packet = new PresencePacket();
1374			packet.setTo(conversation.getMucOptions().getJoinJid());
1375			packet.setFrom(conversation.getAccount().getJid());
1376			packet.setAttribute("type", "unavailable");
1377			sendPresencePacket(conversation.getAccount(), packet);
1378			conversation.getMucOptions().setOffline();
1379			conversation.deregisterWithBookmark();
1380			Log.d(Config.LOGTAG, conversation.getAccount().getJid().toBareJid()
1381					+ ": leaving muc " + conversation.getContactJid());
1382		} else {
1383			account.pendingConferenceLeaves.add(conversation);
1384		}
1385	}
1386
1387	public void disconnect(Account account, boolean force) {
1388		if ((account.getStatus() == Account.STATUS_ONLINE)
1389				|| (account.getStatus() == Account.STATUS_DISABLED)) {
1390			if (!force) {
1391				List<Conversation> conversations = getConversations();
1392				for (Conversation conversation : conversations) {
1393					if (conversation.getAccount() == account) {
1394						if (conversation.getMode() == Conversation.MODE_MULTI) {
1395							leaveMuc(conversation);
1396						} else {
1397							if (conversation.endOtrIfNeeded()) {
1398								Log.d(Config.LOGTAG, account.getJid().toBareJid()
1399										+ ": ended otr session with "
1400										+ conversation.getContactJid());
1401							}
1402						}
1403					}
1404				}
1405			}
1406			account.getXmppConnection().disconnect(force);
1407		}
1408	}
1409
1410	@Override
1411	public IBinder onBind(Intent intent) {
1412		return mBinder;
1413	}
1414
1415	public void updateMessage(Message message) {
1416		databaseBackend.updateMessage(message);
1417		updateConversationUi();
1418	}
1419
1420	protected void syncDirtyContacts(Account account) {
1421		for (Contact contact : account.getRoster().getContacts()) {
1422			if (contact.getOption(Contact.Options.DIRTY_PUSH)) {
1423				pushContactToServer(contact);
1424			}
1425			if (contact.getOption(Contact.Options.DIRTY_DELETE)) {
1426				deleteContactOnServer(contact);
1427			}
1428		}
1429	}
1430
1431	public void createContact(Contact contact) {
1432		SharedPreferences sharedPref = getPreferences();
1433		boolean autoGrant = sharedPref.getBoolean("grant_new_contacts", true);
1434		if (autoGrant) {
1435			contact.setOption(Contact.Options.PREEMPTIVE_GRANT);
1436			contact.setOption(Contact.Options.ASKING);
1437		}
1438		pushContactToServer(contact);
1439	}
1440
1441	public void onOtrSessionEstablished(Conversation conversation) {
1442		Account account = conversation.getAccount();
1443		List<Message> messages = conversation.getMessages();
1444		Session otrSession = conversation.getOtrSession();
1445		Log.d(Config.LOGTAG,
1446				account.getJid().toBareJid() + " otr session established with "
1447						+ conversation.getContactJid() + "/"
1448						+ otrSession.getSessionID().getUserID());
1449		for (Message msg : messages) {
1450			if ((msg.getStatus() == Message.STATUS_UNSEND || msg.getStatus() == Message.STATUS_WAITING)
1451					&& (msg.getEncryption() == Message.ENCRYPTION_OTR)) {
1452				SessionID id = otrSession.getSessionID();
1453				try {
1454					msg.setCounterpart(Jid.fromString(id.getAccountID() + "/" + id.getUserID()));
1455				} catch (InvalidJidException e) {
1456					break;
1457				}
1458				if (msg.getType() == Message.TYPE_TEXT) {
1459					MessagePacket outPacket = mMessageGenerator
1460							.generateOtrChat(msg, true);
1461					if (outPacket != null) {
1462						msg.setStatus(Message.STATUS_SEND);
1463						databaseBackend.updateMessage(msg);
1464						sendMessagePacket(account, outPacket);
1465					}
1466				} else if (msg.getType() == Message.TYPE_IMAGE || msg.getType() == Message.TYPE_FILE) {
1467					mJingleConnectionManager.createNewConnection(msg);
1468				}
1469			}
1470		}
1471		updateConversationUi();
1472	}
1473
1474	public boolean renewSymmetricKey(Conversation conversation) {
1475		Account account = conversation.getAccount();
1476		byte[] symmetricKey = new byte[32];
1477		this.mRandom.nextBytes(symmetricKey);
1478		Session otrSession = conversation.getOtrSession();
1479		if (otrSession != null) {
1480			MessagePacket packet = new MessagePacket();
1481			packet.setType(MessagePacket.TYPE_CHAT);
1482			packet.setFrom(account.getJid());
1483			packet.addChild("private", "urn:xmpp:carbons:2");
1484			packet.addChild("no-copy", "urn:xmpp:hints");
1485			packet.setAttribute("to", otrSession.getSessionID().getAccountID() + "/"
1486					+ otrSession.getSessionID().getUserID());
1487			try {
1488				packet.setBody(otrSession
1489						.transformSending(CryptoHelper.FILETRANSFER
1490								+ CryptoHelper.bytesToHex(symmetricKey)));
1491				sendMessagePacket(account, packet);
1492				conversation.setSymmetricKey(symmetricKey);
1493				return true;
1494			} catch (OtrException e) {
1495				return false;
1496			}
1497		}
1498		return false;
1499	}
1500
1501	public void pushContactToServer(Contact contact) {
1502		contact.resetOption(Contact.Options.DIRTY_DELETE);
1503		contact.setOption(Contact.Options.DIRTY_PUSH);
1504		Account account = contact.getAccount();
1505		if (account.getStatus() == Account.STATUS_ONLINE) {
1506			boolean ask = contact.getOption(Contact.Options.ASKING);
1507			boolean sendUpdates = contact
1508					.getOption(Contact.Options.PENDING_SUBSCRIPTION_REQUEST)
1509					&& contact.getOption(Contact.Options.PREEMPTIVE_GRANT);
1510			IqPacket iq = new IqPacket(IqPacket.TYPE_SET);
1511			iq.query("jabber:iq:roster").addChild(contact.asElement());
1512			account.getXmppConnection().sendIqPacket(iq, null);
1513			if (sendUpdates) {
1514				sendPresencePacket(account,
1515						mPresenceGenerator.sendPresenceUpdatesTo(contact));
1516			}
1517			if (ask) {
1518				sendPresencePacket(account,
1519						mPresenceGenerator.requestPresenceUpdatesFrom(contact));
1520			}
1521		}
1522	}
1523
1524	public void publishAvatar(Account account, Uri image,
1525							  final UiCallback<Avatar> callback) {
1526		final Bitmap.CompressFormat format = Config.AVATAR_FORMAT;
1527		final int size = Config.AVATAR_SIZE;
1528		final Avatar avatar = getFileBackend()
1529				.getPepAvatar(image, size, format);
1530		if (avatar != null) {
1531			avatar.height = size;
1532			avatar.width = size;
1533			if (format.equals(Bitmap.CompressFormat.WEBP)) {
1534				avatar.type = "image/webp";
1535			} else if (format.equals(Bitmap.CompressFormat.JPEG)) {
1536				avatar.type = "image/jpeg";
1537			} else if (format.equals(Bitmap.CompressFormat.PNG)) {
1538				avatar.type = "image/png";
1539			}
1540			if (!getFileBackend().save(avatar)) {
1541				callback.error(R.string.error_saving_avatar, avatar);
1542				return;
1543			}
1544			IqPacket packet = this.mIqGenerator.publishAvatar(avatar);
1545			this.sendIqPacket(account, packet, new OnIqPacketReceived() {
1546
1547				@Override
1548				public void onIqPacketReceived(Account account, IqPacket result) {
1549					if (result.getType() == IqPacket.TYPE_RESULT) {
1550						IqPacket packet = XmppConnectionService.this.mIqGenerator
1551								.publishAvatarMetadata(avatar);
1552						sendIqPacket(account, packet, new OnIqPacketReceived() {
1553
1554							@Override
1555							public void onIqPacketReceived(Account account,
1556														   IqPacket result) {
1557								if (result.getType() == IqPacket.TYPE_RESULT) {
1558									if (account.setAvatar(avatar.getFilename())) {
1559										databaseBackend.updateAccount(account);
1560									}
1561									callback.success(avatar);
1562								} else {
1563									callback.error(
1564											R.string.error_publish_avatar_server_reject,
1565											avatar);
1566								}
1567							}
1568						});
1569					} else {
1570						callback.error(
1571								R.string.error_publish_avatar_server_reject,
1572								avatar);
1573					}
1574				}
1575			});
1576		} else {
1577			callback.error(R.string.error_publish_avatar_converting, null);
1578		}
1579	}
1580
1581	public void fetchAvatar(Account account, Avatar avatar) {
1582		fetchAvatar(account, avatar, null);
1583	}
1584
1585	public void fetchAvatar(Account account, final Avatar avatar,
1586							final UiCallback<Avatar> callback) {
1587		IqPacket packet = this.mIqGenerator.retrieveAvatar(avatar);
1588		sendIqPacket(account, packet, new OnIqPacketReceived() {
1589
1590			@Override
1591			public void onIqPacketReceived(Account account, IqPacket result) {
1592				final String ERROR = account.getJid().toBareJid()
1593						+ ": fetching avatar for " + avatar.owner + " failed ";
1594				if (result.getType() == IqPacket.TYPE_RESULT) {
1595					avatar.image = mIqParser.avatarData(result);
1596					if (avatar.image != null) {
1597						if (getFileBackend().save(avatar)) {
1598							if (account.getJid().toBareJid().equals(avatar.owner)) {
1599								if (account.setAvatar(avatar.getFilename())) {
1600									databaseBackend.updateAccount(account);
1601								}
1602								getAvatarService().clear(account);
1603								updateConversationUi();
1604								updateAccountUi();
1605							} else {
1606								Contact contact = account.getRoster()
1607										.getContact(avatar.owner);
1608								contact.setAvatar(avatar.getFilename());
1609								getAvatarService().clear(contact);
1610								updateConversationUi();
1611								updateRosterUi();
1612							}
1613							if (callback != null) {
1614								callback.success(avatar);
1615							}
1616							Log.d(Config.LOGTAG, account.getJid().toBareJid()
1617									+ ": succesfully fetched avatar for "
1618									+ avatar.owner);
1619							return;
1620						}
1621					} else {
1622
1623						Log.d(Config.LOGTAG, ERROR + "(parsing error)");
1624					}
1625				} else {
1626					Element error = result.findChild("error");
1627					if (error == null) {
1628						Log.d(Config.LOGTAG, ERROR + "(server error)");
1629					} else {
1630						Log.d(Config.LOGTAG, ERROR + error.toString());
1631					}
1632				}
1633				if (callback != null) {
1634					callback.error(0, null);
1635				}
1636
1637			}
1638		});
1639	}
1640
1641	public void checkForAvatar(Account account,
1642							   final UiCallback<Avatar> callback) {
1643		IqPacket packet = this.mIqGenerator.retrieveAvatarMetaData(null);
1644		this.sendIqPacket(account, packet, new OnIqPacketReceived() {
1645
1646			@Override
1647			public void onIqPacketReceived(Account account, IqPacket packet) {
1648				if (packet.getType() == IqPacket.TYPE_RESULT) {
1649					Element pubsub = packet.findChild("pubsub",
1650							"http://jabber.org/protocol/pubsub");
1651					if (pubsub != null) {
1652						Element items = pubsub.findChild("items");
1653						if (items != null) {
1654							Avatar avatar = Avatar.parseMetadata(items);
1655							if (avatar != null) {
1656								avatar.owner = account.getJid().toBareJid();
1657								if (fileBackend.isAvatarCached(avatar)) {
1658									if (account.setAvatar(avatar.getFilename())) {
1659										databaseBackend.updateAccount(account);
1660									}
1661									getAvatarService().clear(account);
1662									callback.success(avatar);
1663								} else {
1664									fetchAvatar(account, avatar, callback);
1665								}
1666								return;
1667							}
1668						}
1669					}
1670				}
1671				callback.error(0, null);
1672			}
1673		});
1674	}
1675
1676	public void deleteContactOnServer(Contact contact) {
1677		contact.resetOption(Contact.Options.PREEMPTIVE_GRANT);
1678		contact.resetOption(Contact.Options.DIRTY_PUSH);
1679		contact.setOption(Contact.Options.DIRTY_DELETE);
1680		Account account = contact.getAccount();
1681		if (account.getStatus() == Account.STATUS_ONLINE) {
1682			IqPacket iq = new IqPacket(IqPacket.TYPE_SET);
1683			Element item = iq.query("jabber:iq:roster").addChild("item");
1684			item.setAttribute("jid", contact.getJid().toString());
1685			item.setAttribute("subscription", "remove");
1686			account.getXmppConnection().sendIqPacket(iq, null);
1687		}
1688	}
1689
1690	public void updateConversation(Conversation conversation) {
1691		this.databaseBackend.updateConversation(conversation);
1692	}
1693
1694	public void reconnectAccount(final Account account, final boolean force) {
1695		new Thread(new Runnable() {
1696
1697			@Override
1698			public void run() {
1699				if (account.getXmppConnection() != null) {
1700					disconnect(account, force);
1701				}
1702				if (!account.isOptionSet(Account.OPTION_DISABLED)) {
1703					if (account.getXmppConnection() == null) {
1704						account.setXmppConnection(createConnection(account));
1705					}
1706					Thread thread = new Thread(account.getXmppConnection());
1707					thread.start();
1708					scheduleWakeupCall((int) (Config.CONNECT_TIMEOUT * 1.2),
1709							false);
1710				} else {
1711					account.getRoster().clearPresences();
1712					account.setXmppConnection(null);
1713				}
1714			}
1715		}).start();
1716	}
1717
1718	public void invite(Conversation conversation, String contact) {
1719		MessagePacket packet = mMessageGenerator.invite(conversation, contact);
1720		sendMessagePacket(conversation.getAccount(), packet);
1721	}
1722
1723	public void resetSendingToWaiting(Account account) {
1724		for (Conversation conversation : getConversations()) {
1725			if (conversation.getAccount() == account) {
1726				for (Message message : conversation.getMessages()) {
1727					if (message.getType() != Message.TYPE_IMAGE
1728							&& message.getStatus() == Message.STATUS_UNSEND) {
1729						markMessage(message, Message.STATUS_WAITING);
1730					}
1731				}
1732			}
1733		}
1734	}
1735
1736	public boolean markMessage(final Account account, final Jid recipient, final String uuid,
1737							   final int status) {
1738		if (uuid == null) {
1739			return false;
1740		} else {
1741			for (Conversation conversation : getConversations()) {
1742				if (conversation.getContactJid().equals(recipient)
1743						&& conversation.getAccount().equals(account)) {
1744					return markMessage(conversation, uuid, status);
1745				}
1746			}
1747			return false;
1748		}
1749	}
1750
1751	public boolean markMessage(Conversation conversation, String uuid,
1752							   int status) {
1753		if (uuid == null) {
1754			return false;
1755		} else {
1756			for (Message message : conversation.getMessages()) {
1757				if (uuid.equals(message.getUuid())
1758						|| (message.getStatus() >= Message.STATUS_SEND && uuid
1759						.equals(message.getRemoteMsgId()))) {
1760					markMessage(message, status);
1761					return true;
1762				}
1763			}
1764			return false;
1765		}
1766	}
1767
1768	public void markMessage(Message message, int status) {
1769		if (status == Message.STATUS_SEND_FAILED
1770				&& (message.getStatus() == Message.STATUS_SEND_RECEIVED || message
1771				.getStatus() == Message.STATUS_SEND_DISPLAYED)) {
1772			return;
1773		}
1774		message.setStatus(status);
1775		databaseBackend.updateMessage(message);
1776		updateConversationUi();
1777	}
1778
1779	public SharedPreferences getPreferences() {
1780		return PreferenceManager
1781				.getDefaultSharedPreferences(getApplicationContext());
1782	}
1783
1784	public boolean forceEncryption() {
1785		return getPreferences().getBoolean("force_encryption", false);
1786	}
1787
1788	public boolean confirmMessages() {
1789		return getPreferences().getBoolean("confirm_messages", true);
1790	}
1791
1792	public boolean saveEncryptedMessages() {
1793		return !getPreferences().getBoolean("dont_save_encrypted", false);
1794	}
1795
1796	public boolean indicateReceived() {
1797		return getPreferences().getBoolean("indicate_received", false);
1798	}
1799
1800	public void updateConversationUi() {
1801		if (mOnConversationUpdate != null) {
1802			mOnConversationUpdate.onConversationUpdate();
1803		}
1804	}
1805
1806	public void updateAccountUi() {
1807		if (mOnAccountUpdate != null) {
1808			mOnAccountUpdate.onAccountUpdate();
1809		}
1810	}
1811
1812	public void updateRosterUi() {
1813		if (mOnRosterUpdate != null) {
1814			mOnRosterUpdate.onRosterUpdate();
1815		}
1816	}
1817
1818	public Account findAccountByJid(final Jid accountJid) {
1819		for (Account account : this.accounts) {
1820			if (account.getJid().toBareJid().equals(accountJid)) {
1821				return account;
1822			}
1823		}
1824		return null;
1825	}
1826
1827	public Conversation findConversationByUuid(String uuid) {
1828		for (Conversation conversation : getConversations()) {
1829			if (conversation.getUuid().equals(uuid)) {
1830				return conversation;
1831			}
1832		}
1833		return null;
1834	}
1835
1836	public void markRead(Conversation conversation, boolean calledByUi) {
1837		mNotificationService.clear(conversation);
1838		String id = conversation.getLatestMarkableMessageId();
1839		conversation.markRead();
1840		if (confirmMessages() && id != null && calledByUi) {
1841			Log.d(Config.LOGTAG, conversation.getAccount().getJid().toBareJid()
1842					+ ": sending read marker for " + conversation.getName());
1843			Account account = conversation.getAccount();
1844			final Jid to = conversation.getContactJid();
1845			this.sendMessagePacket(conversation.getAccount(),
1846					mMessageGenerator.confirm(account, to, id));
1847		}
1848		if (!calledByUi) {
1849			updateConversationUi();
1850		}
1851	}
1852
1853	public void failWaitingOtrMessages(Conversation conversation) {
1854		for (Message message : conversation.getMessages()) {
1855			if (message.getEncryption() == Message.ENCRYPTION_OTR
1856					&& message.getStatus() == Message.STATUS_WAITING) {
1857				markMessage(message, Message.STATUS_SEND_FAILED);
1858			}
1859		}
1860	}
1861
1862	public SecureRandom getRNG() {
1863		return this.mRandom;
1864	}
1865
1866	public MemorizingTrustManager getMemorizingTrustManager() {
1867		return this.mMemorizingTrustManager;
1868	}
1869
1870	public PowerManager getPowerManager() {
1871		return this.pm;
1872	}
1873
1874	public LruCache<String, Bitmap> getBitmapCache() {
1875		return this.mBitmapCache;
1876	}
1877
1878	public void replyWithNotAcceptable(Account account, MessagePacket packet) {
1879		if (account.getStatus() == Account.STATUS_ONLINE) {
1880			MessagePacket error = this.mMessageGenerator
1881					.generateNotAcceptable(packet);
1882			sendMessagePacket(account, error);
1883		}
1884	}
1885
1886	public void syncRosterToDisk(final Account account) {
1887		new Thread(new Runnable() {
1888
1889			@Override
1890			public void run() {
1891				databaseBackend.writeRoster(account.getRoster());
1892			}
1893		}).start();
1894
1895	}
1896
1897	public List<String> getKnownHosts() {
1898		List<String> hosts = new ArrayList<>();
1899		for (Account account : getAccounts()) {
1900			if (!hosts.contains(account.getServer().toString())) {
1901				hosts.add(account.getServer().toString());
1902			}
1903			for (Contact contact : account.getRoster().getContacts()) {
1904				if (contact.showInRoster()) {
1905					final String server = contact.getServer().toString();
1906					if (server != null && !hosts.contains(server)) {
1907						hosts.add(server);
1908					}
1909				}
1910			}
1911		}
1912		return hosts;
1913	}
1914
1915	public List<String> getKnownConferenceHosts() {
1916		ArrayList<String> mucServers = new ArrayList<>();
1917		for (Account account : accounts) {
1918			if (account.getXmppConnection() != null) {
1919				String server = account.getXmppConnection().getMucServer();
1920				if (server != null && !mucServers.contains(server)) {
1921					mucServers.add(server);
1922				}
1923			}
1924		}
1925		return mucServers;
1926	}
1927
1928	public void sendMessagePacket(Account account, MessagePacket packet) {
1929		XmppConnection connection = account.getXmppConnection();
1930		if (connection != null) {
1931			connection.sendMessagePacket(packet);
1932		}
1933	}
1934
1935	public void sendPresencePacket(Account account, PresencePacket packet) {
1936		XmppConnection connection = account.getXmppConnection();
1937		if (connection != null) {
1938			connection.sendPresencePacket(packet);
1939		}
1940	}
1941
1942	public void sendIqPacket(Account account, IqPacket packet,
1943							 OnIqPacketReceived callback) {
1944		XmppConnection connection = account.getXmppConnection();
1945		if (connection != null) {
1946			connection.sendIqPacket(packet, callback);
1947		}
1948	}
1949
1950	public MessageGenerator getMessageGenerator() {
1951		return this.mMessageGenerator;
1952	}
1953
1954	public PresenceGenerator getPresenceGenerator() {
1955		return this.mPresenceGenerator;
1956	}
1957
1958	public IqGenerator getIqGenerator() {
1959		return this.mIqGenerator;
1960	}
1961
1962	public JingleConnectionManager getJingleConnectionManager() {
1963		return this.mJingleConnectionManager;
1964	}
1965
1966	public List<Contact> findContacts(String jid) {
1967		ArrayList<Contact> contacts = new ArrayList<>();
1968		for (Account account : getAccounts()) {
1969			if (!account.isOptionSet(Account.OPTION_DISABLED)) {
1970				Contact contact = account.getRoster().getContactFromRoster(jid);
1971				if (contact != null) {
1972					contacts.add(contact);
1973				}
1974			}
1975		}
1976		return contacts;
1977	}
1978
1979	public NotificationService getNotificationService() {
1980		return this.mNotificationService;
1981	}
1982
1983	public HttpConnectionManager getHttpConnectionManager() {
1984		return this.mHttpConnectionManager;
1985	}
1986
1987	public void resendFailedMessages(Message message) {
1988		List<Message> messages = new ArrayList<>();
1989		Message current = message;
1990		while (current.getStatus() == Message.STATUS_SEND_FAILED) {
1991			messages.add(current);
1992			if (current.mergeable(current.next())) {
1993				current = current.next();
1994			} else {
1995				break;
1996			}
1997		}
1998		for (Message msg : messages) {
1999			markMessage(msg, Message.STATUS_WAITING);
2000			this.resendMessage(msg);
2001		}
2002	}
2003
2004	public interface OnConversationUpdate {
2005		public void onConversationUpdate();
2006	}
2007
2008	public interface OnAccountUpdate {
2009		public void onAccountUpdate();
2010	}
2011
2012	public interface OnRosterUpdate {
2013		public void onRosterUpdate();
2014	}
2015
2016	public class XmppConnectionBinder extends Binder {
2017		public XmppConnectionService getService() {
2018			return XmppConnectionService.this;
2019		}
2020	}
2021}