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.Message;
  61import eu.siacs.conversations.entities.MucOptions;
  62import eu.siacs.conversations.entities.MucOptions.OnRenameListener;
  63import eu.siacs.conversations.entities.Presences;
  64import eu.siacs.conversations.generator.IqGenerator;
  65import eu.siacs.conversations.generator.MessageGenerator;
  66import eu.siacs.conversations.generator.PresenceGenerator;
  67import eu.siacs.conversations.http.HttpConnectionManager;
  68import eu.siacs.conversations.parser.IqParser;
  69import eu.siacs.conversations.parser.MessageParser;
  70import eu.siacs.conversations.parser.PresenceParser;
  71import eu.siacs.conversations.persistance.DatabaseBackend;
  72import eu.siacs.conversations.persistance.FileBackend;
  73import eu.siacs.conversations.ui.UiCallback;
  74import eu.siacs.conversations.utils.CryptoHelper;
  75import eu.siacs.conversations.utils.ExceptionHelper;
  76import eu.siacs.conversations.utils.OnPhoneContactsLoadedListener;
  77import eu.siacs.conversations.utils.PRNGFixes;
  78import eu.siacs.conversations.utils.PhoneHelper;
  79import eu.siacs.conversations.utils.UIHelper;
  80import eu.siacs.conversations.xml.Element;
  81import eu.siacs.conversations.xmpp.OnBindListener;
  82import eu.siacs.conversations.xmpp.OnContactStatusChanged;
  83import eu.siacs.conversations.xmpp.OnIqPacketReceived;
  84import eu.siacs.conversations.xmpp.OnMessageAcknowledged;
  85import eu.siacs.conversations.xmpp.OnStatusChanged;
  86import eu.siacs.conversations.xmpp.XmppConnection;
  87import eu.siacs.conversations.xmpp.jid.InvalidJidException;
  88import eu.siacs.conversations.xmpp.jid.Jid;
  89import eu.siacs.conversations.xmpp.jingle.JingleConnectionManager;
  90import eu.siacs.conversations.xmpp.jingle.OnJinglePacketReceived;
  91import eu.siacs.conversations.xmpp.jingle.stanzas.JinglePacket;
  92import eu.siacs.conversations.xmpp.pep.Avatar;
  93import eu.siacs.conversations.xmpp.stanzas.IqPacket;
  94import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
  95import eu.siacs.conversations.xmpp.stanzas.PresencePacket;
  96
  97public class XmppConnectionService extends Service {
  98
  99	public static String ACTION_CLEAR_NOTIFICATION = "clear_notification";
 100	private static String ACTION_MERGE_PHONE_CONTACTS = "merge_phone_contacts";
 101	private ContentObserver contactObserver = new ContentObserver(null) {
 102		@Override
 103		public void onChange(boolean selfChange) {
 104			super.onChange(selfChange);
 105			Intent intent = new Intent(getApplicationContext(),
 106					XmppConnectionService.class);
 107			intent.setAction(ACTION_MERGE_PHONE_CONTACTS);
 108			startService(intent);
 109		}
 110	};
 111	private final IBinder mBinder = new XmppConnectionBinder();
 112	public DatabaseBackend databaseBackend;
 113	public OnContactStatusChanged onContactStatusChanged = new OnContactStatusChanged() {
 114
 115		@Override
 116		public void onContactStatusChanged(Contact contact, boolean online) {
 117			Conversation conversation = find(getConversations(), contact);
 118			if (conversation != null) {
 119				if (online && contact.getPresences().size() > 1) {
 120					conversation.endOtrIfNeeded();
 121				} else {
 122					conversation.resetOtrSession();
 123				}
 124				if (online && (contact.getPresences().size() == 1)) {
 125					sendUnsendMessages(conversation);
 126				}
 127			}
 128		}
 129	};
 130	private FileBackend fileBackend = new FileBackend(this);
 131	private MemorizingTrustManager mMemorizingTrustManager;
 132	private NotificationService mNotificationService = new NotificationService(
 133			this);
 134	private MessageParser mMessageParser = new MessageParser(this);
 135	private PresenceParser mPresenceParser = new PresenceParser(this);
 136	private IqParser mIqParser = new IqParser(this);
 137	private MessageGenerator mMessageGenerator = new MessageGenerator(this);
 138	private PresenceGenerator mPresenceGenerator = new PresenceGenerator(this);
 139	private List<Account> accounts;
 140	private CopyOnWriteArrayList<Conversation> conversations = null;
 141	private JingleConnectionManager mJingleConnectionManager = new JingleConnectionManager(
 142			this);
 143	private HttpConnectionManager mHttpConnectionManager = new HttpConnectionManager(
 144			this);
 145	private AvatarService mAvatarService = new AvatarService(this);
 146	private OnConversationUpdate mOnConversationUpdate = null;
 147	private Integer convChangedListenerCount = 0;
 148	private OnAccountUpdate mOnAccountUpdate = null;
 149	private OnStatusChanged statusListener = new OnStatusChanged() {
 150
 151		@Override
 152		public void onStatusChanged(Account account) {
 153			XmppConnection connection = account.getXmppConnection();
 154			if (mOnAccountUpdate != null) {
 155				mOnAccountUpdate.onAccountUpdate();
 156			}
 157			if (account.getStatus() == Account.STATUS_ONLINE) {
 158				for (Conversation conversation : account.pendingConferenceLeaves) {
 159					leaveMuc(conversation);
 160				}
 161				for (Conversation conversation : account.pendingConferenceJoins) {
 162					joinMuc(conversation);
 163				}
 164				mJingleConnectionManager.cancelInTransmission();
 165				List<Conversation> conversations = getConversations();
 166				for (Conversation conversation : conversations) {
 167					if (conversation.getAccount() == account) {
 168						conversation.startOtrIfNeeded();
 169						sendUnsendMessages(conversation);
 170					}
 171				}
 172				if (connection != null && connection.getFeatures().csi()) {
 173					if (checkListeners()) {
 174						Log.d(Config.LOGTAG, account.getJid().toBareJid()
 175								+ " sending csi//inactive");
 176						connection.sendInactive();
 177					} else {
 178						Log.d(Config.LOGTAG, account.getJid().toBareJid()
 179								+ " sending csi//active");
 180						connection.sendActive();
 181					}
 182				}
 183				syncDirtyContacts(account);
 184				scheduleWakeupCall(Config.PING_MAX_INTERVAL, true);
 185			} else if (account.getStatus() == Account.STATUS_OFFLINE) {
 186				resetSendingToWaiting(account);
 187				if (!account.isOptionSet(Account.OPTION_DISABLED)) {
 188					int timeToReconnect = mRandom.nextInt(50) + 10;
 189					scheduleWakeupCall(timeToReconnect, false);
 190				}
 191			} else if (account.getStatus() == Account.STATUS_REGISTRATION_SUCCESSFULL) {
 192				databaseBackend.updateAccount(account);
 193				reconnectAccount(account, true);
 194			} else if ((account.getStatus() != Account.STATUS_CONNECTING)
 195					&& (account.getStatus() != Account.STATUS_NO_INTERNET)) {
 196				if (connection != null) {
 197					int next = connection.getTimeToNextAttempt();
 198					Log.d(Config.LOGTAG, account.getJid().toBareJid()
 199							+ ": error connecting account. try again in "
 200							+ next + "s for the "
 201							+ (connection.getAttempt() + 1) + " time");
 202					scheduleWakeupCall((int) (next * 1.2), false);
 203				}
 204			}
 205			UIHelper.showErrorNotification(getApplicationContext(),
 206					getAccounts());
 207		}
 208	};
 209	private Integer accountChangedListenerCount = 0;
 210	private OnRosterUpdate mOnRosterUpdate = null;
 211	private Integer rosterChangedListenerCount = 0;
 212	private SecureRandom mRandom;
 213	private FileObserver fileObserver = new FileObserver(
 214			FileBackend.getConversationsImageDirectory()) {
 215
 216		@Override
 217		public void onEvent(int event, String path) {
 218			if (event == FileObserver.DELETE) {
 219				markFileDeleted(path.split("\\.")[0]);
 220			}
 221		}
 222	};
 223	private OnJinglePacketReceived jingleListener = new OnJinglePacketReceived() {
 224
 225		@Override
 226		public void onJinglePacketReceived(Account account, JinglePacket packet) {
 227			mJingleConnectionManager.deliverPacket(account, packet);
 228		}
 229	};
 230
 231	private OpenPgpServiceConnection pgpServiceConnection;
 232	private PgpEngine mPgpEngine = null;
 233	private Intent pingIntent;
 234	private PendingIntent pendingPingIntent = null;
 235	private WakeLock wakeLock;
 236	private PowerManager pm;
 237	private OnBindListener mOnBindListener = new OnBindListener() {
 238
 239		@Override
 240		public void onBind(final Account account) {
 241			account.getRoster().clearPresences();
 242			account.clearPresences(); // self presences
 243			account.pendingConferenceJoins.clear();
 244			account.pendingConferenceLeaves.clear();
 245			fetchRosterFromServer(account);
 246			fetchBookmarks(account);
 247			sendPresencePacket(account,
 248					mPresenceGenerator.sendPresence(account));
 249			connectMultiModeConversations(account);
 250			updateConversationUi();
 251		}
 252	};
 253
 254	private OnMessageAcknowledged mOnMessageAcknowledgedListener = new OnMessageAcknowledged() {
 255
 256		@Override
 257		public void onMessageAcknowledged(Account account, String uuid) {
 258			for (Conversation conversation : getConversations()) {
 259				if (conversation.getAccount() == account) {
 260					for (Message message : conversation.getMessages()) {
 261						if ((message.getStatus() == Message.STATUS_UNSEND || message
 262								.getStatus() == Message.STATUS_WAITING)
 263								&& message.getUuid().equals(uuid)) {
 264							markMessage(message, Message.STATUS_SEND);
 265							return;
 266						}
 267					}
 268				}
 269			}
 270		}
 271	};
 272	private LruCache<String, Bitmap> mBitmapCache;
 273	private OnRenameListener renameListener = null;
 274	private IqGenerator mIqGenerator = new IqGenerator(this);
 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 void attachFileToConversation(Conversation conversation, final Uri uri, final UiCallback<Message> callback) {
 299		final Message message;
 300		if (conversation.getNextEncryption(forceEncryption()) == Message.ENCRYPTION_PGP) {
 301			message = new Message(conversation, "",
 302					Message.ENCRYPTION_DECRYPTED);
 303		} else {
 304			message = new Message(conversation, "",
 305					conversation.getNextEncryption(forceEncryption()));
 306		}
 307		message.setCounterpart(conversation.getNextCounterpart());
 308		message.setType(Message.TYPE_FILE);
 309		message.setStatus(Message.STATUS_OFFERED);
 310		String path = getFileBackend().getOriginalPath(uri);
 311		if (path!=null) {
 312			message.setRelativeFilePath(path);
 313			getFileBackend().updateFileParams(message);
 314			if (message.getEncryption() == Message.ENCRYPTION_DECRYPTED) {
 315				getPgpEngine().encrypt(message, callback);
 316			} else {
 317				callback.success(message);
 318			}
 319		} else {
 320			new Thread(new Runnable() {
 321				@Override
 322				public void run() {
 323					try {
 324						getFileBackend().copyFileToPrivateStorage(message, uri);
 325						getFileBackend().updateFileParams(message);
 326						if (message.getEncryption() == Message.ENCRYPTION_DECRYPTED) {
 327							getPgpEngine().encrypt(message, callback);
 328						} else {
 329							callback.success(message);
 330						}
 331					} catch (FileBackend.FileCopyException e) {
 332						callback.error(e.getResId(),message);
 333					}
 334				}
 335			}).start();
 336
 337		}
 338	}
 339
 340	public void attachImageToConversation(final Conversation conversation,
 341											 final Uri uri, final UiCallback<Message> callback) {
 342		final Message message;
 343		if (conversation.getNextEncryption(forceEncryption()) == Message.ENCRYPTION_PGP) {
 344			message = new Message(conversation, "",
 345					Message.ENCRYPTION_DECRYPTED);
 346		} else {
 347			message = new Message(conversation, "",
 348					conversation.getNextEncryption(forceEncryption()));
 349		}
 350		message.setCounterpart(conversation.getNextCounterpart());
 351		message.setType(Message.TYPE_IMAGE);
 352		message.setStatus(Message.STATUS_OFFERED);
 353		new Thread(new Runnable() {
 354
 355			@Override
 356			public void run() {
 357				try {
 358					DownloadableFile file = getFileBackend().copyImageToPrivateStorage(message, uri);
 359					if (conversation.getNextEncryption(forceEncryption()) == Message.ENCRYPTION_PGP) {
 360						getPgpEngine().encrypt(message, callback);
 361					} else {
 362						callback.success(message);
 363					}
 364				} catch (FileBackend.FileCopyException e) {
 365					callback.error(e.getResId(), message);
 366				}
 367			}
 368		}).start();
 369	}
 370
 371	public Conversation find(Bookmark bookmark) {
 372		return find(bookmark.getAccount(), bookmark.getJid());
 373	}
 374
 375	public Conversation find(final Account account, final Jid jid) {
 376		return find(getConversations(), account, jid);
 377	}
 378
 379	@Override
 380	public int onStartCommand(Intent intent, int flags, int startId) {
 381		if (intent != null && intent.getAction() != null) {
 382			if (intent.getAction().equals(ACTION_MERGE_PHONE_CONTACTS)) {
 383				mergePhoneContactsWithRoster();
 384				return START_STICKY;
 385			} else if (intent.getAction().equals(Intent.ACTION_SHUTDOWN)) {
 386				logoutAndSave();
 387				return START_NOT_STICKY;
 388			} else if (intent.getAction().equals(ACTION_CLEAR_NOTIFICATION)) {
 389				mNotificationService.clear();
 390			}
 391		}
 392		this.wakeLock.acquire();
 393
 394		for (Account account : accounts) {
 395			if (!account.isOptionSet(Account.OPTION_DISABLED)) {
 396				if (!hasInternetConnection()) {
 397					account.setStatus(Account.STATUS_NO_INTERNET);
 398					if (statusListener != null) {
 399						statusListener.onStatusChanged(account);
 400					}
 401				} else {
 402					if (account.getStatus() == Account.STATUS_NO_INTERNET) {
 403						account.setStatus(Account.STATUS_OFFLINE);
 404						if (statusListener != null) {
 405							statusListener.onStatusChanged(account);
 406						}
 407					}
 408					if (account.getStatus() == Account.STATUS_ONLINE) {
 409						long lastReceived = account.getXmppConnection()
 410								.getLastPacketReceived();
 411						long lastSent = account.getXmppConnection()
 412								.getLastPingSent();
 413						if (lastSent - lastReceived >= Config.PING_TIMEOUT * 1000) {
 414							Log.d(Config.LOGTAG, account.getJid()
 415									+ ": ping timeout");
 416							this.reconnectAccount(account, true);
 417						} else if (SystemClock.elapsedRealtime() - lastReceived >= Config.PING_MIN_INTERVAL * 1000) {
 418							account.getXmppConnection().sendPing();
 419							this.scheduleWakeupCall(2, false);
 420						}
 421					} else if (account.getStatus() == Account.STATUS_OFFLINE) {
 422						if (account.getXmppConnection() == null) {
 423							account.setXmppConnection(this
 424									.createConnection(account));
 425						}
 426						new Thread(account.getXmppConnection()).start();
 427					} else if ((account.getStatus() == Account.STATUS_CONNECTING)
 428							&& ((SystemClock.elapsedRealtime() - account
 429							.getXmppConnection().getLastConnect()) / 1000 >= Config.CONNECT_TIMEOUT)) {
 430						Log.d(Config.LOGTAG, account.getJid()
 431								+ ": time out during connect reconnecting");
 432						reconnectAccount(account, true);
 433					} else {
 434						if (account.getXmppConnection().getTimeToNextAttempt() <= 0) {
 435							reconnectAccount(account, true);
 436						}
 437					}
 438					// in any case. reschedule wakup call
 439					this.scheduleWakeupCall(Config.PING_MAX_INTERVAL, true);
 440				}
 441				if (mOnAccountUpdate != null) {
 442					mOnAccountUpdate.onAccountUpdate();
 443				}
 444			}
 445		}
 446		/*PowerManager pm = (PowerManager) this.getSystemService(Context.POWER_SERVICE);
 447		if (!pm.isScreenOn()) {
 448			removeStaleListeners();
 449		}*/
 450		if (wakeLock.isHeld()) {
 451			try {
 452				wakeLock.release();
 453			} catch (final RuntimeException ignored) {
 454			}
 455		}
 456		return START_STICKY;
 457	}
 458
 459	public boolean hasInternetConnection() {
 460		ConnectivityManager cm = (ConnectivityManager) getApplicationContext()
 461				.getSystemService(Context.CONNECTIVITY_SERVICE);
 462		NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
 463		return activeNetwork != null && activeNetwork.isConnected();
 464	}
 465
 466	@SuppressLint("TrulyRandom")
 467	@Override
 468	public void onCreate() {
 469		ExceptionHelper.init(getApplicationContext());
 470		PRNGFixes.apply();
 471		this.mRandom = new SecureRandom();
 472		this.mMemorizingTrustManager = new MemorizingTrustManager(
 473				getApplicationContext());
 474
 475		int maxMemory = (int) (Runtime.getRuntime().maxMemory() / 1024);
 476		int cacheSize = maxMemory / 8;
 477		this.mBitmapCache = new LruCache<String, Bitmap>(cacheSize) {
 478			@Override
 479			protected int sizeOf(String key, Bitmap bitmap) {
 480				return bitmap.getByteCount() / 1024;
 481			}
 482		};
 483
 484		this.databaseBackend = DatabaseBackend
 485				.getInstance(getApplicationContext());
 486		this.accounts = databaseBackend.getAccounts();
 487
 488		for (Account account : this.accounts) {
 489			this.databaseBackend.readRoster(account.getRoster());
 490		}
 491		this.mergePhoneContactsWithRoster();
 492		this.getConversations();
 493
 494		getContentResolver().registerContentObserver(
 495				ContactsContract.Contacts.CONTENT_URI, true, contactObserver);
 496		this.fileObserver.startWatching();
 497		this.pgpServiceConnection = new OpenPgpServiceConnection(
 498				getApplicationContext(), "org.sufficientlysecure.keychain");
 499		this.pgpServiceConnection.bindToService();
 500
 501		this.pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
 502		this.wakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK,
 503				"XmppConnectionService");
 504	}
 505
 506	@Override
 507	public void onDestroy() {
 508		super.onDestroy();
 509		this.logoutAndSave();
 510	}
 511
 512	@Override
 513	public void onTaskRemoved(Intent rootIntent) {
 514		super.onTaskRemoved(rootIntent);
 515		this.logoutAndSave();
 516	}
 517
 518	private void logoutAndSave() {
 519		for (Account account : accounts) {
 520			databaseBackend.writeRoster(account.getRoster());
 521			if (account.getXmppConnection() != null) {
 522				disconnect(account, false);
 523			}
 524		}
 525		Context context = getApplicationContext();
 526		AlarmManager alarmManager = (AlarmManager) context
 527				.getSystemService(Context.ALARM_SERVICE);
 528		Intent intent = new Intent(context, EventReceiver.class);
 529		alarmManager.cancel(PendingIntent.getBroadcast(context, 0, intent, 0));
 530		Log.d(Config.LOGTAG, "good bye");
 531		stopSelf();
 532	}
 533
 534	protected void scheduleWakeupCall(int seconds, boolean ping) {
 535		long timeToWake = SystemClock.elapsedRealtime() + seconds * 1000;
 536		Context context = getApplicationContext();
 537		AlarmManager alarmManager = (AlarmManager) context
 538				.getSystemService(Context.ALARM_SERVICE);
 539
 540		if (ping) {
 541			if (this.pingIntent == null) {
 542				this.pingIntent = new Intent(context, EventReceiver.class);
 543				this.pingIntent.setAction("ping");
 544				this.pingIntent.putExtra("time", timeToWake);
 545				this.pendingPingIntent = PendingIntent.getBroadcast(context, 0,
 546						this.pingIntent, 0);
 547				alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP,
 548						timeToWake, pendingPingIntent);
 549			} else {
 550				long scheduledTime = this.pingIntent.getLongExtra("time", 0);
 551				if (scheduledTime < SystemClock.elapsedRealtime()
 552						|| (scheduledTime > timeToWake)) {
 553					this.pingIntent.putExtra("time", timeToWake);
 554					alarmManager.cancel(this.pendingPingIntent);
 555					this.pendingPingIntent = PendingIntent.getBroadcast(
 556							context, 0, this.pingIntent, 0);
 557					alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP,
 558							timeToWake, pendingPingIntent);
 559				}
 560			}
 561		} else {
 562			Intent intent = new Intent(context, EventReceiver.class);
 563			intent.setAction("ping_check");
 564			PendingIntent alarmIntent = PendingIntent.getBroadcast(context, 0,
 565					intent, 0);
 566			alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP, timeToWake,
 567					alarmIntent);
 568		}
 569
 570	}
 571
 572	public XmppConnection createConnection(Account account) {
 573		SharedPreferences sharedPref = getPreferences();
 574		account.setResource(sharedPref.getString("resource", "mobile")
 575				.toLowerCase(Locale.getDefault()));
 576		XmppConnection connection = new XmppConnection(account, this);
 577		connection.setOnMessagePacketReceivedListener(this.mMessageParser);
 578		connection.setOnStatusChangedListener(this.statusListener);
 579		connection.setOnPresencePacketReceivedListener(this.mPresenceParser);
 580		connection.setOnUnregisteredIqPacketReceivedListener(this.mIqParser);
 581		connection.setOnJinglePacketReceivedListener(this.jingleListener);
 582		connection.setOnBindListener(this.mOnBindListener);
 583		connection
 584				.setOnMessageAcknowledgeListener(this.mOnMessageAcknowledgedListener);
 585		return connection;
 586	}
 587
 588	public void sendMessage(Message message) {
 589		Account account = message.getConversation().getAccount();
 590		account.deactivateGracePeriod();
 591		Conversation conv = message.getConversation();
 592		MessagePacket packet = null;
 593		boolean saveInDb = true;
 594		boolean send = false;
 595		if (account.getStatus() == Account.STATUS_ONLINE
 596				&& account.getXmppConnection() != null) {
 597			if (message.getType() == Message.TYPE_IMAGE || message.getType() == Message.TYPE_FILE) {
 598				if (message.getCounterpart() != null) {
 599					if (message.getEncryption() == Message.ENCRYPTION_OTR) {
 600						if (!conv.hasValidOtrSession()) {
 601							conv.startOtrSession(this, message.getCounterpart().getResourcepart(),
 602									true);
 603							message.setStatus(Message.STATUS_WAITING);
 604						} else if (conv.hasValidOtrSession()
 605								&& conv.getOtrSession().getSessionStatus() == SessionStatus.ENCRYPTED) {
 606							mJingleConnectionManager
 607									.createNewConnection(message);
 608						}
 609					} else {
 610						mJingleConnectionManager.createNewConnection(message);
 611					}
 612				} else {
 613					if (message.getEncryption() == Message.ENCRYPTION_OTR) {
 614						conv.startOtrIfNeeded();
 615					}
 616					message.setStatus(Message.STATUS_WAITING);
 617				}
 618			} else {
 619				if (message.getEncryption() == Message.ENCRYPTION_OTR) {
 620					if (!conv.hasValidOtrSession() && (message.getCounterpart() != null)) {
 621						conv.startOtrSession(this, message.getCounterpart().getResourcepart(), true);
 622						message.setStatus(Message.STATUS_WAITING);
 623					} else if (conv.hasValidOtrSession()) {
 624						if (conv.getOtrSession().getSessionStatus() == SessionStatus.ENCRYPTED) {
 625							packet = mMessageGenerator.generateOtrChat(message);
 626							send = true;
 627						} else {
 628							message.setStatus(Message.STATUS_WAITING);
 629							conv.startOtrIfNeeded();
 630						}
 631					} else {
 632						message.setStatus(Message.STATUS_WAITING);
 633					}
 634				} else if (message.getEncryption() == Message.ENCRYPTION_DECRYPTED) {
 635					message.getConversation().endOtrIfNeeded();
 636					failWaitingOtrMessages(message.getConversation());
 637					packet = mMessageGenerator.generatePgpChat(message);
 638					send = true;
 639				} else {
 640					message.getConversation().endOtrIfNeeded();
 641					failWaitingOtrMessages(message.getConversation());
 642					packet = mMessageGenerator.generateChat(message);
 643					send = true;
 644				}
 645			}
 646			if (!account.getXmppConnection().getFeatures().sm()
 647					&& conv.getMode() != Conversation.MODE_MULTI) {
 648				message.setStatus(Message.STATUS_SEND);
 649			}
 650		} else {
 651			message.setStatus(Message.STATUS_WAITING);
 652			if (message.getType() == Message.TYPE_TEXT) {
 653				if (message.getEncryption() == Message.ENCRYPTION_DECRYPTED) {
 654					String pgpBody = message.getEncryptedBody();
 655					String decryptedBody = message.getBody();
 656					message.setBody(pgpBody);
 657					message.setEncryption(Message.ENCRYPTION_PGP);
 658					databaseBackend.createMessage(message);
 659					saveInDb = false;
 660					message.setBody(decryptedBody);
 661					message.setEncryption(Message.ENCRYPTION_DECRYPTED);
 662				} else if (message.getEncryption() == Message.ENCRYPTION_OTR) {
 663					if (!conv.hasValidOtrSession()
 664							&& message.getCounterpart() != null) {
 665						conv.startOtrSession(this, message.getCounterpart().getResourcepart(), false);
 666					}
 667				}
 668			}
 669
 670		}
 671		conv.add(message);
 672		if (saveInDb) {
 673			if (message.getEncryption() == Message.ENCRYPTION_NONE
 674					|| saveEncryptedMessages()) {
 675				databaseBackend.createMessage(message);
 676			}
 677		}
 678		if ((send) && (packet != null)) {
 679			sendMessagePacket(account, packet);
 680		}
 681		updateConversationUi();
 682	}
 683
 684	private void sendUnsendMessages(Conversation conversation) {
 685		for (int i = 0; i < conversation.getMessages().size(); ++i) {
 686			int status = conversation.getMessages().get(i).getStatus();
 687			if (status == Message.STATUS_WAITING) {
 688				resendMessage(conversation.getMessages().get(i));
 689			}
 690		}
 691	}
 692
 693	private void resendMessage(Message message) {
 694		Account account = message.getConversation().getAccount();
 695		MessagePacket packet = null;
 696		if (message.getEncryption() == Message.ENCRYPTION_OTR) {
 697			Presences presences = message.getConversation().getContact()
 698					.getPresences();
 699			if (!message.getConversation().hasValidOtrSession()) {
 700				if ((message.getCounterpart() != null)
 701						&& (presences.has(message.getCounterpart().getResourcepart()))) {
 702					message.getConversation().startOtrSession(this,
 703							message.getCounterpart().getResourcepart(), true);
 704				} else {
 705					if (presences.size() == 1) {
 706						String presence = presences.asStringArray()[0];
 707						message.getConversation().startOtrSession(this,
 708								presence, true);
 709					}
 710				}
 711			} else {
 712				if (message.getConversation().getOtrSession()
 713						.getSessionStatus() == SessionStatus.ENCRYPTED) {
 714					if (message.getType() == Message.TYPE_TEXT) {
 715						packet = mMessageGenerator.generateOtrChat(message,
 716								true);
 717					} else if (message.getType() == Message.TYPE_IMAGE) {
 718						mJingleConnectionManager.createNewConnection(message);
 719					}
 720				}
 721			}
 722		} else if (message.getType() == Message.TYPE_TEXT) {
 723			if (message.getEncryption() == Message.ENCRYPTION_NONE) {
 724				packet = mMessageGenerator.generateChat(message, true);
 725			} else if ((message.getEncryption() == Message.ENCRYPTION_DECRYPTED)
 726					|| (message.getEncryption() == Message.ENCRYPTION_PGP)) {
 727				packet = mMessageGenerator.generatePgpChat(message, true);
 728			}
 729		} else if (message.getType() == Message.TYPE_IMAGE) {
 730			Contact contact = message.getConversation().getContact();
 731			Presences presences = contact.getPresences();
 732			if ((message.getCounterpart() != null)
 733					&& (presences.has(message.getCounterpart().getResourcepart()))) {
 734				markMessage(message, Message.STATUS_OFFERED);
 735				mJingleConnectionManager.createNewConnection(message);
 736			} else {
 737				if (presences.size() == 1) {
 738					String presence = presences.asStringArray()[0];
 739					try {
 740						message.setCounterpart(Jid.fromParts(contact.getJid().getLocalpart(), contact.getJid().getDomainpart(), presence));
 741					} catch (InvalidJidException e) {
 742						return;
 743					}
 744					markMessage(message, Message.STATUS_OFFERED);
 745					mJingleConnectionManager.createNewConnection(message);
 746				}
 747			}
 748		}
 749		if (packet != null) {
 750			if (!account.getXmppConnection().getFeatures().sm()
 751					&& message.getConversation().getMode() != Conversation.MODE_MULTI) {
 752				markMessage(message, Message.STATUS_SEND);
 753			} else {
 754				markMessage(message, Message.STATUS_UNSEND);
 755			}
 756			sendMessagePacket(account, packet);
 757		}
 758	}
 759
 760	public void fetchRosterFromServer(Account account) {
 761		IqPacket iqPacket = new IqPacket(IqPacket.TYPE_GET);
 762		if (!"".equals(account.getRosterVersion())) {
 763			Log.d(Config.LOGTAG, account.getJid().toBareJid()
 764					+ ": fetching roster version " + account.getRosterVersion());
 765		} else {
 766			Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": fetching roster");
 767		}
 768		iqPacket.query("jabber:iq:roster").setAttribute("ver",
 769				account.getRosterVersion());
 770		account.getXmppConnection().sendIqPacket(iqPacket,
 771				new OnIqPacketReceived() {
 772
 773					@Override
 774					public void onIqPacketReceived(final Account account,
 775												   IqPacket packet) {
 776						Element query = packet.findChild("query");
 777						if (query != null) {
 778							account.getRoster().markAllAsNotInRoster();
 779							mIqParser.rosterItems(account, query);
 780						}
 781					}
 782				});
 783	}
 784
 785	public void fetchBookmarks(Account account) {
 786		IqPacket iqPacket = new IqPacket(IqPacket.TYPE_GET);
 787		Element query = iqPacket.query("jabber:iq:private");
 788		query.addChild("storage", "storage:bookmarks");
 789		OnIqPacketReceived callback = new OnIqPacketReceived() {
 790
 791			@Override
 792			public void onIqPacketReceived(Account account, IqPacket packet) {
 793				Element query = packet.query();
 794				List<Bookmark> bookmarks = new CopyOnWriteArrayList<>();
 795				Element storage = query.findChild("storage",
 796						"storage:bookmarks");
 797				if (storage != null) {
 798					for (Element item : storage.getChildren()) {
 799						if (item.getName().equals("conference")) {
 800							Bookmark bookmark = Bookmark.parse(item, account);
 801							bookmarks.add(bookmark);
 802							Conversation conversation = find(bookmark);
 803							if (conversation != null) {
 804								conversation.setBookmark(bookmark);
 805							} else {
 806								if (bookmark.autojoin()) {
 807									conversation = findOrCreateConversation(
 808											account, bookmark.getJid(), true);
 809									conversation.setBookmark(bookmark);
 810									joinMuc(conversation);
 811								}
 812							}
 813						}
 814					}
 815				}
 816				account.setBookmarks(bookmarks);
 817			}
 818		};
 819		sendIqPacket(account, iqPacket, callback);
 820
 821	}
 822
 823	public void pushBookmarks(Account account) {
 824		IqPacket iqPacket = new IqPacket(IqPacket.TYPE_SET);
 825		Element query = iqPacket.query("jabber:iq:private");
 826		Element storage = query.addChild("storage", "storage:bookmarks");
 827		for (Bookmark bookmark : account.getBookmarks()) {
 828			storage.addChild(bookmark);
 829		}
 830		sendIqPacket(account, iqPacket, null);
 831	}
 832
 833	private void mergePhoneContactsWithRoster() {
 834		PhoneHelper.loadPhoneContacts(getApplicationContext(),
 835				new OnPhoneContactsLoadedListener() {
 836					@Override
 837					public void onPhoneContactsLoaded(List<Bundle> phoneContacts) {
 838						for (Account account : accounts) {
 839							account.getRoster().clearSystemAccounts();
 840						}
 841						for (Bundle phoneContact : phoneContacts) {
 842							for (Account account : accounts) {
 843								Jid jid;
 844								try {
 845									jid = Jid.fromString(phoneContact.getString("jid"));
 846								} catch (final InvalidJidException e) {
 847									// TODO: Warn if contact import fails here?
 848									break;
 849								}
 850								final Contact contact = account.getRoster()
 851										.getContact(jid);
 852								String systemAccount = phoneContact
 853										.getInt("phoneid")
 854										+ "#"
 855										+ phoneContact.getString("lookup");
 856								contact.setSystemAccount(systemAccount);
 857								contact.setPhotoUri(phoneContact
 858										.getString("photouri"));
 859								contact.setSystemName(phoneContact
 860										.getString("displayname"));
 861								getAvatarService().clear(contact);
 862							}
 863						}
 864					}
 865				});
 866	}
 867
 868	public List<Conversation> getConversations() {
 869		if (this.conversations == null) {
 870			Hashtable<String, Account> accountLookupTable = new Hashtable<>();
 871			for (Account account : this.accounts) {
 872				accountLookupTable.put(account.getUuid(), account);
 873			}
 874			this.conversations = databaseBackend
 875					.getConversations(Conversation.STATUS_AVAILABLE);
 876			for (Conversation conv : this.conversations) {
 877				Account account = accountLookupTable.get(conv.getAccountUuid());
 878				conv.setAccount(account);
 879				conv.setMessages(databaseBackend.getMessages(conv, 50));
 880				checkDeletedFiles(conv);
 881			}
 882		}
 883		return this.conversations;
 884	}
 885
 886	private void checkDeletedFiles(Conversation conversation) {
 887		for (Message message : conversation.getMessages()) {
 888			if (message.getType() == Message.TYPE_IMAGE
 889					&& message.getEncryption() != Message.ENCRYPTION_PGP) {
 890				if (!getFileBackend().isFileAvailable(message)) {
 891					message.setDownloadable(new DeletedDownloadable());
 892				}
 893			}
 894		}
 895	}
 896
 897	private void markFileDeleted(String uuid) {
 898		for (Conversation conversation : getConversations()) {
 899			for (Message message : conversation.getMessages()) {
 900				if (message.getType() == Message.TYPE_IMAGE
 901						&& message.getEncryption() != Message.ENCRYPTION_PGP
 902						&& message.getUuid().equals(uuid)) {
 903					if (!getFileBackend().isFileAvailable(message)) {
 904						message.setDownloadable(new DeletedDownloadable());
 905						updateConversationUi();
 906					}
 907					return;
 908				}
 909			}
 910		}
 911	}
 912
 913	public void populateWithOrderedConversations(List<Conversation> list) {
 914		populateWithOrderedConversations(list, true);
 915	}
 916
 917	public void populateWithOrderedConversations(List<Conversation> list,
 918												 boolean includeConferences) {
 919		list.clear();
 920		if (includeConferences) {
 921			list.addAll(getConversations());
 922		} else {
 923			for (Conversation conversation : getConversations()) {
 924				if (conversation.getMode() == Conversation.MODE_SINGLE) {
 925					list.add(conversation);
 926				}
 927			}
 928		}
 929		Collections.sort(list, new Comparator<Conversation>() {
 930			@Override
 931			public int compare(Conversation lhs, Conversation rhs) {
 932				Message left = lhs.getLatestMessage();
 933				Message right = rhs.getLatestMessage();
 934				if (left.getTimeSent() > right.getTimeSent()) {
 935					return -1;
 936				} else if (left.getTimeSent() < right.getTimeSent()) {
 937					return 1;
 938				} else {
 939					return 0;
 940				}
 941			}
 942		});
 943	}
 944
 945	public int loadMoreMessages(Conversation conversation, long timestamp) {
 946		List<Message> messages = databaseBackend.getMessages(conversation, 50,
 947				timestamp);
 948		for (Message message : messages) {
 949			message.setConversation(conversation);
 950		}
 951		conversation.addAll(0, messages);
 952		return messages.size();
 953	}
 954
 955	public List<Account> getAccounts() {
 956		return this.accounts;
 957	}
 958
 959	public Conversation find(List<Conversation> haystack, Contact contact) {
 960		for (Conversation conversation : haystack) {
 961			if (conversation.getContact() == contact) {
 962				return conversation;
 963			}
 964		}
 965		return null;
 966	}
 967
 968	public Conversation find(final List<Conversation> haystack,
 969							 final Account account,
 970							 final Jid jid) {
 971		for (Conversation conversation : haystack) {
 972			if ((account == null || conversation.getAccount() == account)
 973					&& (conversation.getContactJid().toBareJid().equals(jid.toBareJid()))) {
 974				return conversation;
 975			}
 976		}
 977		return null;
 978	}
 979
 980	public Conversation findOrCreateConversation(final Account account, final Jid jid,
 981												 final boolean muc) {
 982		Conversation conversation = find(account, jid);
 983		if (conversation != null) {
 984			return conversation;
 985		}
 986		conversation = databaseBackend.findConversation(account, jid);
 987		if (conversation != null) {
 988			conversation.setStatus(Conversation.STATUS_AVAILABLE);
 989			conversation.setAccount(account);
 990			if (muc) {
 991				conversation.setMode(Conversation.MODE_MULTI);
 992			} else {
 993				conversation.setMode(Conversation.MODE_SINGLE);
 994			}
 995			conversation.setMessages(databaseBackend.getMessages(conversation,
 996					50));
 997			this.databaseBackend.updateConversation(conversation);
 998		} else {
 999			String conversationName;
1000			Contact contact = account.getRoster().getContact(jid);
1001			if (contact != null) {
1002				conversationName = contact.getDisplayName();
1003			} else {
1004				conversationName = jid.getLocalpart();
1005			}
1006			if (muc) {
1007				conversation = new Conversation(conversationName, account, jid,
1008						Conversation.MODE_MULTI);
1009			} else {
1010				conversation = new Conversation(conversationName, account, jid,
1011						Conversation.MODE_SINGLE);
1012			}
1013			this.databaseBackend.createConversation(conversation);
1014		}
1015		this.conversations.add(conversation);
1016		updateConversationUi();
1017		return conversation;
1018	}
1019
1020	public void archiveConversation(Conversation conversation) {
1021		if (conversation.getMode() == Conversation.MODE_MULTI) {
1022			if (conversation.getAccount().getStatus() == Account.STATUS_ONLINE) {
1023				Bookmark bookmark = conversation.getBookmark();
1024				if (bookmark != null && bookmark.autojoin()) {
1025					bookmark.setAutojoin(false);
1026					pushBookmarks(bookmark.getAccount());
1027				}
1028			}
1029			leaveMuc(conversation);
1030		} else {
1031			conversation.endOtrIfNeeded();
1032		}
1033		this.databaseBackend.updateConversation(conversation);
1034		this.conversations.remove(conversation);
1035		updateConversationUi();
1036	}
1037
1038	public void clearConversationHistory(Conversation conversation) {
1039		this.databaseBackend.deleteMessagesInConversation(conversation);
1040		conversation.getMessages().clear();
1041		updateConversationUi();
1042	}
1043
1044	public int getConversationCount() {
1045		return this.databaseBackend.getConversationCount();
1046	}
1047
1048	public void createAccount(Account account) {
1049		databaseBackend.createAccount(account);
1050		this.accounts.add(account);
1051		this.reconnectAccount(account, false);
1052		updateAccountUi();
1053	}
1054
1055	public void updateAccount(Account account) {
1056		this.statusListener.onStatusChanged(account);
1057		databaseBackend.updateAccount(account);
1058		reconnectAccount(account, false);
1059		updateAccountUi();
1060		UIHelper.showErrorNotification(getApplicationContext(), getAccounts());
1061	}
1062
1063	public void deleteAccount(Account account) {
1064		for (Conversation conversation : conversations) {
1065			if (conversation.getAccount() == account) {
1066				if (conversation.getMode() == Conversation.MODE_MULTI) {
1067					leaveMuc(conversation);
1068				} else if (conversation.getMode() == Conversation.MODE_SINGLE) {
1069					conversation.endOtrIfNeeded();
1070				}
1071				conversations.remove(conversation);
1072			}
1073		}
1074		if (account.getXmppConnection() != null) {
1075			this.disconnect(account, true);
1076		}
1077		databaseBackend.deleteAccount(account);
1078		this.accounts.remove(account);
1079		updateAccountUi();
1080		UIHelper.showErrorNotification(getApplicationContext(), getAccounts());
1081	}
1082
1083	private void removeStaleListeners() {
1084		boolean removedListener = false;
1085		synchronized (this.convChangedListenerCount) {
1086			if (this.mOnConversationUpdate != null) {
1087				this.mOnConversationUpdate = null;
1088				this.convChangedListenerCount = 0;
1089				this.mNotificationService.setIsInForeground(false);
1090				removedListener = true;
1091			}
1092		}
1093		synchronized (this.accountChangedListenerCount) {
1094			if (this.mOnAccountUpdate != null) {
1095				this.mOnAccountUpdate = null;
1096				this.accountChangedListenerCount = 0;
1097				removedListener = true;
1098			}
1099		}
1100		synchronized (this.rosterChangedListenerCount) {
1101			if (this.mOnRosterUpdate != null) {
1102				this.mOnRosterUpdate = null;
1103				this.rosterChangedListenerCount = 0;
1104				removedListener = true;
1105			}
1106		}
1107		if (removedListener) {
1108			final String msg = "removed stale listeners";
1109			Log.d(Config.LOGTAG, msg);
1110			checkListeners();
1111			try {
1112				OutputStream os = openFileOutput("stacktrace.txt", MODE_PRIVATE);
1113				os.write(msg.getBytes());
1114				os.flush();
1115				os.close();
1116			} catch (final FileNotFoundException ignored) {
1117
1118			} catch (final IOException ignored) {
1119			}
1120		}
1121	}
1122
1123	public void setOnConversationListChangedListener(
1124			OnConversationUpdate listener) {
1125		/*if (!isScreenOn()) {
1126			Log.d(Config.LOGTAG,
1127					"ignoring setOnConversationListChangedListener");
1128			return;
1129		}*/
1130		synchronized (this.convChangedListenerCount) {
1131			if (checkListeners()) {
1132				switchToForeground();
1133			}
1134			this.mOnConversationUpdate = listener;
1135			this.mNotificationService.setIsInForeground(true);
1136			this.convChangedListenerCount++;
1137		}
1138	}
1139
1140	public void removeOnConversationListChangedListener() {
1141		synchronized (this.convChangedListenerCount) {
1142			this.convChangedListenerCount--;
1143			if (this.convChangedListenerCount <= 0) {
1144				this.convChangedListenerCount = 0;
1145				this.mOnConversationUpdate = null;
1146				this.mNotificationService.setIsInForeground(false);
1147				if (checkListeners()) {
1148					switchToBackground();
1149				}
1150			}
1151		}
1152	}
1153
1154	public void setOnAccountListChangedListener(OnAccountUpdate listener) {
1155		/*if (!isScreenOn()) {
1156			Log.d(Config.LOGTAG, "ignoring setOnAccountListChangedListener");
1157			return;
1158		}*/
1159		synchronized (this.accountChangedListenerCount) {
1160			if (checkListeners()) {
1161				switchToForeground();
1162			}
1163			this.mOnAccountUpdate = listener;
1164			this.accountChangedListenerCount++;
1165		}
1166	}
1167
1168	public void removeOnAccountListChangedListener() {
1169		synchronized (this.accountChangedListenerCount) {
1170			this.accountChangedListenerCount--;
1171			if (this.accountChangedListenerCount <= 0) {
1172				this.mOnAccountUpdate = null;
1173				this.accountChangedListenerCount = 0;
1174				if (checkListeners()) {
1175					switchToBackground();
1176				}
1177			}
1178		}
1179	}
1180
1181	public void setOnRosterUpdateListener(OnRosterUpdate listener) {
1182		/*if (!isScreenOn()) {
1183			Log.d(Config.LOGTAG, "ignoring setOnRosterUpdateListener");
1184			return;
1185		}*/
1186		synchronized (this.rosterChangedListenerCount) {
1187			if (checkListeners()) {
1188				switchToForeground();
1189			}
1190			this.mOnRosterUpdate = listener;
1191			this.rosterChangedListenerCount++;
1192		}
1193	}
1194
1195	public void removeOnRosterUpdateListener() {
1196		synchronized (this.rosterChangedListenerCount) {
1197			this.rosterChangedListenerCount--;
1198			if (this.rosterChangedListenerCount <= 0) {
1199				this.rosterChangedListenerCount = 0;
1200				this.mOnRosterUpdate = null;
1201				if (checkListeners()) {
1202					switchToBackground();
1203				}
1204			}
1205		}
1206	}
1207
1208	private boolean checkListeners() {
1209		return (this.mOnAccountUpdate == null
1210				&& this.mOnConversationUpdate == null && this.mOnRosterUpdate == null);
1211	}
1212
1213	private void switchToForeground() {
1214		for (Account account : getAccounts()) {
1215			if (account.getStatus() == Account.STATUS_ONLINE) {
1216				XmppConnection connection = account.getXmppConnection();
1217				if (connection != null && connection.getFeatures().csi()) {
1218					connection.sendActive();
1219				}
1220			}
1221		}
1222		Log.d(Config.LOGTAG, "app switched into foreground");
1223	}
1224
1225	private void switchToBackground() {
1226		for (Account account : getAccounts()) {
1227			if (account.getStatus() == Account.STATUS_ONLINE) {
1228				XmppConnection connection = account.getXmppConnection();
1229				if (connection != null && connection.getFeatures().csi()) {
1230					connection.sendInactive();
1231				}
1232			}
1233		}
1234		this.mNotificationService.setIsInForeground(false);
1235		Log.d(Config.LOGTAG, "app switched into background");
1236	}
1237
1238	private boolean isScreenOn() {
1239		PowerManager pm = (PowerManager) this
1240				.getSystemService(Context.POWER_SERVICE);
1241		return pm.isScreenOn();
1242	}
1243
1244	public void connectMultiModeConversations(Account account) {
1245		List<Conversation> conversations = getConversations();
1246		for (Conversation conversation : conversations) {
1247			if ((conversation.getMode() == Conversation.MODE_MULTI)
1248					&& (conversation.getAccount() == account)) {
1249				joinMuc(conversation);
1250			}
1251		}
1252	}
1253
1254	public void joinMuc(Conversation conversation) {
1255		Account account = conversation.getAccount();
1256		account.pendingConferenceJoins.remove(conversation);
1257		account.pendingConferenceLeaves.remove(conversation);
1258		if (account.getStatus() == Account.STATUS_ONLINE) {
1259			Log.d(Config.LOGTAG,
1260					"joining conversation " + conversation.getContactJid());
1261			String nick = conversation.getMucOptions().getProposedNick();
1262			conversation.getMucOptions().setJoinNick(nick);
1263			PresencePacket packet = new PresencePacket();
1264			final Jid joinJid = conversation.getMucOptions().getJoinJid();
1265			packet.setTo(conversation.getMucOptions().getJoinJid());
1266			Element x = new Element("x");
1267			x.setAttribute("xmlns", "http://jabber.org/protocol/muc");
1268			if (conversation.getMucOptions().getPassword() != null) {
1269				Element password = x.addChild("password");
1270				password.setContent(conversation.getMucOptions().getPassword());
1271			}
1272			String sig = account.getPgpSignature();
1273			if (sig != null) {
1274				packet.addChild("status").setContent("online");
1275				packet.addChild("x", "jabber:x:signed").setContent(sig);
1276			}
1277			if (conversation.getMessages().size() != 0) {
1278				final SimpleDateFormat mDateFormat = new SimpleDateFormat(
1279						"yyyy-MM-dd'T'HH:mm:ss.SSS'Z'", Locale.US);
1280				mDateFormat.setTimeZone(TimeZone.getTimeZone("UTC"));
1281				Date date = new Date(conversation.getLatestMessage()
1282						.getTimeSent() + 1000);
1283				x.addChild("history").setAttribute("since",
1284						mDateFormat.format(date));
1285			}
1286			packet.addChild(x);
1287			sendPresencePacket(account, packet);
1288			if (!joinJid.equals(conversation.getContactJid())) {
1289				conversation.setContactJid(joinJid);
1290				databaseBackend.updateConversation(conversation);
1291			}
1292		} else {
1293			account.pendingConferenceJoins.add(conversation);
1294		}
1295	}
1296
1297	public void setOnRenameListener(OnRenameListener listener) {
1298		this.renameListener = listener;
1299	}
1300
1301	public void providePasswordForMuc(Conversation conversation, String password) {
1302		if (conversation.getMode() == Conversation.MODE_MULTI) {
1303			conversation.getMucOptions().setPassword(password);
1304			if (conversation.getBookmark() != null) {
1305				conversation.getBookmark().setAutojoin(true);
1306				pushBookmarks(conversation.getAccount());
1307			}
1308			databaseBackend.updateConversation(conversation);
1309			joinMuc(conversation);
1310		}
1311	}
1312
1313	public void renameInMuc(final Conversation conversation, final String nick) {
1314		final MucOptions options = conversation.getMucOptions();
1315		options.setJoinNick(nick);
1316		if (options.online()) {
1317			Account account = conversation.getAccount();
1318			options.setOnRenameListener(new OnRenameListener() {
1319
1320				@Override
1321				public void onRename(boolean success) {
1322					if (renameListener != null) {
1323						renameListener.onRename(success);
1324					}
1325					if (success) {
1326						conversation.setContactJid(conversation.getMucOptions()
1327								.getJoinJid());
1328						databaseBackend.updateConversation(conversation);
1329						Bookmark bookmark = conversation.getBookmark();
1330						if (bookmark != null) {
1331							bookmark.setNick(nick);
1332							pushBookmarks(bookmark.getAccount());
1333						}
1334					}
1335				}
1336			});
1337			options.flagAboutToRename();
1338			PresencePacket packet = new PresencePacket();
1339			packet.setTo(options.getJoinJid());
1340			packet.setFrom(conversation.getAccount().getJid());
1341
1342			String sig = account.getPgpSignature();
1343			if (sig != null) {
1344				packet.addChild("status").setContent("online");
1345				packet.addChild("x", "jabber:x:signed").setContent(sig);
1346			}
1347			sendPresencePacket(account, packet);
1348		} else {
1349			conversation.setContactJid(options.getJoinJid());
1350			databaseBackend.updateConversation(conversation);
1351			if (conversation.getAccount().getStatus() == Account.STATUS_ONLINE) {
1352				Bookmark bookmark = conversation.getBookmark();
1353				if (bookmark != null) {
1354					bookmark.setNick(nick);
1355					pushBookmarks(bookmark.getAccount());
1356				}
1357				joinMuc(conversation);
1358			}
1359		}
1360	}
1361
1362	public void leaveMuc(Conversation conversation) {
1363		Account account = conversation.getAccount();
1364		account.pendingConferenceJoins.remove(conversation);
1365		account.pendingConferenceLeaves.remove(conversation);
1366		if (account.getStatus() == Account.STATUS_ONLINE) {
1367			PresencePacket packet = new PresencePacket();
1368			packet.setTo(conversation.getMucOptions().getJoinJid());
1369			packet.setFrom(conversation.getAccount().getJid());
1370			packet.setAttribute("type", "unavailable");
1371			sendPresencePacket(conversation.getAccount(), packet);
1372			conversation.getMucOptions().setOffline();
1373			conversation.deregisterWithBookmark();
1374			Log.d(Config.LOGTAG, conversation.getAccount().getJid().toBareJid()
1375					+ ": leaving muc " + conversation.getContactJid());
1376		} else {
1377			account.pendingConferenceLeaves.add(conversation);
1378		}
1379	}
1380
1381	public void disconnect(Account account, boolean force) {
1382		if ((account.getStatus() == Account.STATUS_ONLINE)
1383				|| (account.getStatus() == Account.STATUS_DISABLED)) {
1384			if (!force) {
1385				List<Conversation> conversations = getConversations();
1386				for (Conversation conversation : conversations) {
1387					if (conversation.getAccount() == account) {
1388						if (conversation.getMode() == Conversation.MODE_MULTI) {
1389							leaveMuc(conversation);
1390						} else {
1391							if (conversation.endOtrIfNeeded()) {
1392								Log.d(Config.LOGTAG, account.getJid().toBareJid()
1393										+ ": ended otr session with "
1394										+ conversation.getContactJid());
1395							}
1396						}
1397					}
1398				}
1399			}
1400			account.getXmppConnection().disconnect(force);
1401		}
1402	}
1403
1404	@Override
1405	public IBinder onBind(Intent intent) {
1406		return mBinder;
1407	}
1408
1409	public void updateMessage(Message message) {
1410		databaseBackend.updateMessage(message);
1411		updateConversationUi();
1412	}
1413
1414	protected void syncDirtyContacts(Account account) {
1415		for (Contact contact : account.getRoster().getContacts()) {
1416			if (contact.getOption(Contact.Options.DIRTY_PUSH)) {
1417				pushContactToServer(contact);
1418			}
1419			if (contact.getOption(Contact.Options.DIRTY_DELETE)) {
1420				deleteContactOnServer(contact);
1421			}
1422		}
1423	}
1424
1425	public void createContact(Contact contact) {
1426		SharedPreferences sharedPref = getPreferences();
1427		boolean autoGrant = sharedPref.getBoolean("grant_new_contacts", true);
1428		if (autoGrant) {
1429			contact.setOption(Contact.Options.PREEMPTIVE_GRANT);
1430			contact.setOption(Contact.Options.ASKING);
1431		}
1432		pushContactToServer(contact);
1433	}
1434
1435	public void onOtrSessionEstablished(Conversation conversation) {
1436		Account account = conversation.getAccount();
1437		List<Message> messages = conversation.getMessages();
1438		Session otrSession = conversation.getOtrSession();
1439		Log.d(Config.LOGTAG,
1440				account.getJid().toBareJid() + " otr session established with "
1441						+ conversation.getContactJid() + "/"
1442						+ otrSession.getSessionID().getUserID());
1443		for (Message msg : messages) {
1444			if ((msg.getStatus() == Message.STATUS_UNSEND || msg.getStatus() == Message.STATUS_WAITING)
1445					&& (msg.getEncryption() == Message.ENCRYPTION_OTR)) {
1446				SessionID id = otrSession.getSessionID();
1447				try {
1448					msg.setCounterpart(Jid.fromString(id.getAccountID() + "/" + id.getUserID()));
1449				} catch (InvalidJidException e) {
1450					break;
1451				}
1452				if (msg.getType() == Message.TYPE_TEXT) {
1453					MessagePacket outPacket = mMessageGenerator
1454							.generateOtrChat(msg, true);
1455					if (outPacket != null) {
1456						msg.setStatus(Message.STATUS_SEND);
1457						databaseBackend.updateMessage(msg);
1458						sendMessagePacket(account, outPacket);
1459					}
1460				} else if (msg.getType() == Message.TYPE_IMAGE) {
1461					mJingleConnectionManager.createNewConnection(msg);
1462				}
1463			}
1464		}
1465		updateConversationUi();
1466	}
1467
1468	public boolean renewSymmetricKey(Conversation conversation) {
1469		Account account = conversation.getAccount();
1470		byte[] symmetricKey = new byte[32];
1471		this.mRandom.nextBytes(symmetricKey);
1472		Session otrSession = conversation.getOtrSession();
1473		if (otrSession != null) {
1474			MessagePacket packet = new MessagePacket();
1475			packet.setType(MessagePacket.TYPE_CHAT);
1476			packet.setFrom(account.getJid());
1477			packet.addChild("private", "urn:xmpp:carbons:2");
1478			packet.addChild("no-copy", "urn:xmpp:hints");
1479			packet.setAttribute("to", otrSession.getSessionID().getAccountID() + "/"
1480					+ otrSession.getSessionID().getUserID());
1481			try {
1482				packet.setBody(otrSession
1483						.transformSending(CryptoHelper.FILETRANSFER
1484								+ CryptoHelper.bytesToHex(symmetricKey)));
1485				sendMessagePacket(account, packet);
1486				conversation.setSymmetricKey(symmetricKey);
1487				return true;
1488			} catch (OtrException e) {
1489				return false;
1490			}
1491		}
1492		return false;
1493	}
1494
1495	public void pushContactToServer(Contact contact) {
1496		contact.resetOption(Contact.Options.DIRTY_DELETE);
1497		contact.setOption(Contact.Options.DIRTY_PUSH);
1498		Account account = contact.getAccount();
1499		if (account.getStatus() == Account.STATUS_ONLINE) {
1500			boolean ask = contact.getOption(Contact.Options.ASKING);
1501			boolean sendUpdates = contact
1502					.getOption(Contact.Options.PENDING_SUBSCRIPTION_REQUEST)
1503					&& contact.getOption(Contact.Options.PREEMPTIVE_GRANT);
1504			IqPacket iq = new IqPacket(IqPacket.TYPE_SET);
1505			iq.query("jabber:iq:roster").addChild(contact.asElement());
1506			account.getXmppConnection().sendIqPacket(iq, null);
1507			if (sendUpdates) {
1508				sendPresencePacket(account,
1509						mPresenceGenerator.sendPresenceUpdatesTo(contact));
1510			}
1511			if (ask) {
1512				sendPresencePacket(account,
1513						mPresenceGenerator.requestPresenceUpdatesFrom(contact));
1514			}
1515		}
1516	}
1517
1518	public void publishAvatar(Account account, Uri image,
1519							  final UiCallback<Avatar> callback) {
1520		final Bitmap.CompressFormat format = Config.AVATAR_FORMAT;
1521		final int size = Config.AVATAR_SIZE;
1522		final Avatar avatar = getFileBackend()
1523				.getPepAvatar(image, size, format);
1524		if (avatar != null) {
1525			avatar.height = size;
1526			avatar.width = size;
1527			if (format.equals(Bitmap.CompressFormat.WEBP)) {
1528				avatar.type = "image/webp";
1529			} else if (format.equals(Bitmap.CompressFormat.JPEG)) {
1530				avatar.type = "image/jpeg";
1531			} else if (format.equals(Bitmap.CompressFormat.PNG)) {
1532				avatar.type = "image/png";
1533			}
1534			if (!getFileBackend().save(avatar)) {
1535				callback.error(R.string.error_saving_avatar, avatar);
1536				return;
1537			}
1538			IqPacket packet = this.mIqGenerator.publishAvatar(avatar);
1539			this.sendIqPacket(account, packet, new OnIqPacketReceived() {
1540
1541				@Override
1542				public void onIqPacketReceived(Account account, IqPacket result) {
1543					if (result.getType() == IqPacket.TYPE_RESULT) {
1544						IqPacket packet = XmppConnectionService.this.mIqGenerator
1545								.publishAvatarMetadata(avatar);
1546						sendIqPacket(account, packet, new OnIqPacketReceived() {
1547
1548							@Override
1549							public void onIqPacketReceived(Account account,
1550														   IqPacket result) {
1551								if (result.getType() == IqPacket.TYPE_RESULT) {
1552									if (account.setAvatar(avatar.getFilename())) {
1553										databaseBackend.updateAccount(account);
1554									}
1555									callback.success(avatar);
1556								} else {
1557									callback.error(
1558											R.string.error_publish_avatar_server_reject,
1559											avatar);
1560								}
1561							}
1562						});
1563					} else {
1564						callback.error(
1565								R.string.error_publish_avatar_server_reject,
1566								avatar);
1567					}
1568				}
1569			});
1570		} else {
1571			callback.error(R.string.error_publish_avatar_converting, null);
1572		}
1573	}
1574
1575	public void fetchAvatar(Account account, Avatar avatar) {
1576		fetchAvatar(account, avatar, null);
1577	}
1578
1579	public void fetchAvatar(Account account, final Avatar avatar,
1580							final UiCallback<Avatar> callback) {
1581		IqPacket packet = this.mIqGenerator.retrieveAvatar(avatar);
1582		sendIqPacket(account, packet, new OnIqPacketReceived() {
1583
1584			@Override
1585			public void onIqPacketReceived(Account account, IqPacket result) {
1586				final String ERROR = account.getJid().toBareJid()
1587						+ ": fetching avatar for " + avatar.owner + " failed ";
1588				if (result.getType() == IqPacket.TYPE_RESULT) {
1589					avatar.image = mIqParser.avatarData(result);
1590					if (avatar.image != null) {
1591						if (getFileBackend().save(avatar)) {
1592							if (account.getJid().toBareJid().equals(avatar.owner)) {
1593								if (account.setAvatar(avatar.getFilename())) {
1594									databaseBackend.updateAccount(account);
1595								}
1596								getAvatarService().clear(account);
1597								updateConversationUi();
1598								updateAccountUi();
1599							} else {
1600								Contact contact = account.getRoster()
1601										.getContact(avatar.owner);
1602								contact.setAvatar(avatar.getFilename());
1603								getAvatarService().clear(contact);
1604								updateConversationUi();
1605								updateRosterUi();
1606							}
1607							if (callback != null) {
1608								callback.success(avatar);
1609							}
1610							Log.d(Config.LOGTAG, account.getJid().toBareJid()
1611									+ ": succesfully fetched avatar for "
1612									+ avatar.owner);
1613							return;
1614						}
1615					} else {
1616
1617						Log.d(Config.LOGTAG, ERROR + "(parsing error)");
1618					}
1619				} else {
1620					Element error = result.findChild("error");
1621					if (error == null) {
1622						Log.d(Config.LOGTAG, ERROR + "(server error)");
1623					} else {
1624						Log.d(Config.LOGTAG, ERROR + error.toString());
1625					}
1626				}
1627				if (callback != null) {
1628					callback.error(0, null);
1629				}
1630
1631			}
1632		});
1633	}
1634
1635	public void checkForAvatar(Account account,
1636							   final UiCallback<Avatar> callback) {
1637		IqPacket packet = this.mIqGenerator.retrieveAvatarMetaData(null);
1638		this.sendIqPacket(account, packet, new OnIqPacketReceived() {
1639
1640			@Override
1641			public void onIqPacketReceived(Account account, IqPacket packet) {
1642				if (packet.getType() == IqPacket.TYPE_RESULT) {
1643					Element pubsub = packet.findChild("pubsub",
1644							"http://jabber.org/protocol/pubsub");
1645					if (pubsub != null) {
1646						Element items = pubsub.findChild("items");
1647						if (items != null) {
1648							Avatar avatar = Avatar.parseMetadata(items);
1649							if (avatar != null) {
1650								avatar.owner = account.getJid().toBareJid();
1651								if (fileBackend.isAvatarCached(avatar)) {
1652									if (account.setAvatar(avatar.getFilename())) {
1653										databaseBackend.updateAccount(account);
1654									}
1655									getAvatarService().clear(account);
1656									callback.success(avatar);
1657								} else {
1658									fetchAvatar(account, avatar, callback);
1659								}
1660								return;
1661							}
1662						}
1663					}
1664				}
1665				callback.error(0, null);
1666			}
1667		});
1668	}
1669
1670	public void deleteContactOnServer(Contact contact) {
1671		contact.resetOption(Contact.Options.PREEMPTIVE_GRANT);
1672		contact.resetOption(Contact.Options.DIRTY_PUSH);
1673		contact.setOption(Contact.Options.DIRTY_DELETE);
1674		Account account = contact.getAccount();
1675		if (account.getStatus() == Account.STATUS_ONLINE) {
1676			IqPacket iq = new IqPacket(IqPacket.TYPE_SET);
1677			Element item = iq.query("jabber:iq:roster").addChild("item");
1678			item.setAttribute("jid", contact.getJid().toString());
1679			item.setAttribute("subscription", "remove");
1680			account.getXmppConnection().sendIqPacket(iq, null);
1681		}
1682	}
1683
1684	public void updateConversation(Conversation conversation) {
1685		this.databaseBackend.updateConversation(conversation);
1686	}
1687
1688	public void reconnectAccount(final Account account, final boolean force) {
1689		new Thread(new Runnable() {
1690
1691			@Override
1692			public void run() {
1693				if (account.getXmppConnection() != null) {
1694					disconnect(account, force);
1695				}
1696				if (!account.isOptionSet(Account.OPTION_DISABLED)) {
1697					if (account.getXmppConnection() == null) {
1698						account.setXmppConnection(createConnection(account));
1699					}
1700					Thread thread = new Thread(account.getXmppConnection());
1701					thread.start();
1702					scheduleWakeupCall((int) (Config.CONNECT_TIMEOUT * 1.2),
1703							false);
1704				} else {
1705					account.getRoster().clearPresences();
1706					account.setXmppConnection(null);
1707				}
1708			}
1709		}).start();
1710	}
1711
1712	public void invite(Conversation conversation, String contact) {
1713		MessagePacket packet = mMessageGenerator.invite(conversation, contact);
1714		sendMessagePacket(conversation.getAccount(), packet);
1715	}
1716
1717	public void resetSendingToWaiting(Account account) {
1718		for (Conversation conversation : getConversations()) {
1719			if (conversation.getAccount() == account) {
1720				for (Message message : conversation.getMessages()) {
1721					if (message.getType() != Message.TYPE_IMAGE
1722							&& message.getStatus() == Message.STATUS_UNSEND) {
1723						markMessage(message, Message.STATUS_WAITING);
1724					}
1725				}
1726			}
1727		}
1728	}
1729
1730	public boolean markMessage(final Account account, final Jid recipient, final String uuid,
1731							   final int status) {
1732		if (uuid == null) {
1733			return false;
1734		} else {
1735			for (Conversation conversation : getConversations()) {
1736				if (conversation.getContactJid().equals(recipient)
1737						&& conversation.getAccount().equals(account)) {
1738					return markMessage(conversation, uuid, status);
1739				}
1740			}
1741			return false;
1742		}
1743	}
1744
1745	public boolean markMessage(Conversation conversation, String uuid,
1746							   int status) {
1747		if (uuid == null) {
1748			return false;
1749		} else {
1750			for (Message message : conversation.getMessages()) {
1751				if (uuid.equals(message.getUuid())
1752						|| (message.getStatus() >= Message.STATUS_SEND && uuid
1753						.equals(message.getRemoteMsgId()))) {
1754					markMessage(message, status);
1755					return true;
1756				}
1757			}
1758			return false;
1759		}
1760	}
1761
1762	public void markMessage(Message message, int status) {
1763		if (status == Message.STATUS_SEND_FAILED
1764				&& (message.getStatus() == Message.STATUS_SEND_RECEIVED || message
1765				.getStatus() == Message.STATUS_SEND_DISPLAYED)) {
1766			return;
1767		}
1768		message.setStatus(status);
1769		databaseBackend.updateMessage(message);
1770		updateConversationUi();
1771	}
1772
1773	public SharedPreferences getPreferences() {
1774		return PreferenceManager
1775				.getDefaultSharedPreferences(getApplicationContext());
1776	}
1777
1778	public boolean forceEncryption() {
1779		return getPreferences().getBoolean("force_encryption", false);
1780	}
1781
1782	public boolean confirmMessages() {
1783		return getPreferences().getBoolean("confirm_messages", true);
1784	}
1785
1786	public boolean saveEncryptedMessages() {
1787		return !getPreferences().getBoolean("dont_save_encrypted", false);
1788	}
1789
1790	public boolean indicateReceived() {
1791		return getPreferences().getBoolean("indicate_received", false);
1792	}
1793
1794	public void updateConversationUi() {
1795		if (mOnConversationUpdate != null) {
1796			mOnConversationUpdate.onConversationUpdate();
1797		}
1798	}
1799
1800	public void updateAccountUi() {
1801		if (mOnAccountUpdate != null) {
1802			mOnAccountUpdate.onAccountUpdate();
1803		}
1804	}
1805
1806	public void updateRosterUi() {
1807		if (mOnRosterUpdate != null) {
1808			mOnRosterUpdate.onRosterUpdate();
1809		}
1810	}
1811
1812	public Account findAccountByJid(final Jid accountJid) {
1813		for (Account account : this.accounts) {
1814			if (account.getJid().toBareJid().equals(accountJid)) {
1815				return account;
1816			}
1817		}
1818		return null;
1819	}
1820
1821	public Conversation findConversationByUuid(String uuid) {
1822		for (Conversation conversation : getConversations()) {
1823			if (conversation.getUuid().equals(uuid)) {
1824				return conversation;
1825			}
1826		}
1827		return null;
1828	}
1829
1830	public void markRead(Conversation conversation, boolean calledByUi) {
1831		mNotificationService.clear(conversation);
1832		String id = conversation.getLatestMarkableMessageId();
1833		conversation.markRead();
1834		if (confirmMessages() && id != null && calledByUi) {
1835			Log.d(Config.LOGTAG, conversation.getAccount().getJid().toBareJid()
1836					+ ": sending read marker for " + conversation.getName());
1837			Account account = conversation.getAccount();
1838			final Jid to = conversation.getContactJid();
1839			this.sendMessagePacket(conversation.getAccount(),
1840					mMessageGenerator.confirm(account, to, id));
1841		}
1842		if (!calledByUi) {
1843			updateConversationUi();
1844		}
1845	}
1846
1847	public void failWaitingOtrMessages(Conversation conversation) {
1848		for (Message message : conversation.getMessages()) {
1849			if (message.getEncryption() == Message.ENCRYPTION_OTR
1850					&& message.getStatus() == Message.STATUS_WAITING) {
1851				markMessage(message, Message.STATUS_SEND_FAILED);
1852			}
1853		}
1854	}
1855
1856	public SecureRandom getRNG() {
1857		return this.mRandom;
1858	}
1859
1860	public MemorizingTrustManager getMemorizingTrustManager() {
1861		return this.mMemorizingTrustManager;
1862	}
1863
1864	public PowerManager getPowerManager() {
1865		return this.pm;
1866	}
1867
1868	public LruCache<String, Bitmap> getBitmapCache() {
1869		return this.mBitmapCache;
1870	}
1871
1872	public void replyWithNotAcceptable(Account account, MessagePacket packet) {
1873		if (account.getStatus() == Account.STATUS_ONLINE) {
1874			MessagePacket error = this.mMessageGenerator
1875					.generateNotAcceptable(packet);
1876			sendMessagePacket(account, error);
1877		}
1878	}
1879
1880	public void syncRosterToDisk(final Account account) {
1881		new Thread(new Runnable() {
1882
1883			@Override
1884			public void run() {
1885				databaseBackend.writeRoster(account.getRoster());
1886			}
1887		}).start();
1888
1889	}
1890
1891	public List<String> getKnownHosts() {
1892		List<String> hosts = new ArrayList<>();
1893		for (Account account : getAccounts()) {
1894			if (!hosts.contains(account.getServer().toString())) {
1895				hosts.add(account.getServer().toString());
1896			}
1897			for (Contact contact : account.getRoster().getContacts()) {
1898				if (contact.showInRoster()) {
1899					final String server = contact.getServer().toString();
1900					if (server != null && !hosts.contains(server)) {
1901						hosts.add(server);
1902					}
1903				}
1904			}
1905		}
1906		return hosts;
1907	}
1908
1909	public List<String> getKnownConferenceHosts() {
1910		ArrayList<String> mucServers = new ArrayList<>();
1911		for (Account account : accounts) {
1912			if (account.getXmppConnection() != null) {
1913				String server = account.getXmppConnection().getMucServer();
1914				if (server != null && !mucServers.contains(server)) {
1915					mucServers.add(server);
1916				}
1917			}
1918		}
1919		return mucServers;
1920	}
1921
1922	public void sendMessagePacket(Account account, MessagePacket packet) {
1923		XmppConnection connection = account.getXmppConnection();
1924		if (connection != null) {
1925			connection.sendMessagePacket(packet);
1926		}
1927	}
1928
1929	public void sendPresencePacket(Account account, PresencePacket packet) {
1930		XmppConnection connection = account.getXmppConnection();
1931		if (connection != null) {
1932			connection.sendPresencePacket(packet);
1933		}
1934	}
1935
1936	public void sendIqPacket(Account account, IqPacket packet,
1937							 OnIqPacketReceived callback) {
1938		XmppConnection connection = account.getXmppConnection();
1939		if (connection != null) {
1940			connection.sendIqPacket(packet, callback);
1941		}
1942	}
1943
1944	public MessageGenerator getMessageGenerator() {
1945		return this.mMessageGenerator;
1946	}
1947
1948	public PresenceGenerator getPresenceGenerator() {
1949		return this.mPresenceGenerator;
1950	}
1951
1952	public IqGenerator getIqGenerator() {
1953		return this.mIqGenerator;
1954	}
1955
1956	public JingleConnectionManager getJingleConnectionManager() {
1957		return this.mJingleConnectionManager;
1958	}
1959
1960	public List<Contact> findContacts(String jid) {
1961		ArrayList<Contact> contacts = new ArrayList<>();
1962		for (Account account : getAccounts()) {
1963			if (!account.isOptionSet(Account.OPTION_DISABLED)) {
1964				Contact contact = account.getRoster().getContactFromRoster(jid);
1965				if (contact != null) {
1966					contacts.add(contact);
1967				}
1968			}
1969		}
1970		return contacts;
1971	}
1972
1973	public NotificationService getNotificationService() {
1974		return this.mNotificationService;
1975	}
1976
1977	public HttpConnectionManager getHttpConnectionManager() {
1978		return this.mHttpConnectionManager;
1979	}
1980
1981	public void resendFailedMessages(Message message) {
1982		List<Message> messages = new ArrayList<>();
1983		Message current = message;
1984		while (current.getStatus() == Message.STATUS_SEND_FAILED) {
1985			messages.add(current);
1986			if (current.mergeable(current.next())) {
1987				current = current.next();
1988			} else {
1989				break;
1990			}
1991		}
1992		for (Message msg : messages) {
1993			markMessage(msg, Message.STATUS_WAITING);
1994			this.resendMessage(msg);
1995		}
1996	}
1997
1998	public interface OnConversationUpdate {
1999		public void onConversationUpdate();
2000	}
2001
2002	public interface OnAccountUpdate {
2003		public void onAccountUpdate();
2004	}
2005
2006	public interface OnRosterUpdate {
2007		public void onRosterUpdate();
2008	}
2009
2010	public class XmppConnectionBinder extends Binder {
2011		public XmppConnectionService getService() {
2012			return XmppConnectionService.this;
2013		}
2014	}
2015
2016	private class DeletedDownloadable implements Downloadable {
2017
2018		@Override
2019		public boolean start() {
2020			return false;
2021		}
2022
2023		@Override
2024		public int getStatus() {
2025			return Downloadable.STATUS_DELETED;
2026		}
2027
2028		@Override
2029		public long getFileSize() {
2030			return 0;
2031		}
2032
2033		@Override
2034		public int getProgress() {
2035			return 0;
2036		}
2037
2038		@Override
2039		public String getMimeType() {
2040			return "";
2041		}
2042
2043	}
2044}