XmppConnectionService.java

   1package eu.siacs.conversations.services;
   2
   3import java.security.SecureRandom;
   4import java.text.SimpleDateFormat;
   5import java.util.ArrayList;
   6import java.util.Collections;
   7import java.util.Comparator;
   8import java.util.Date;
   9import java.util.Hashtable;
  10import java.util.List;
  11import java.util.Locale;
  12import java.util.TimeZone;
  13import java.util.concurrent.CopyOnWriteArrayList;
  14
  15import org.openintents.openpgp.util.OpenPgpApi;
  16import org.openintents.openpgp.util.OpenPgpServiceConnection;
  17
  18import de.duenndns.ssl.MemorizingTrustManager;
  19
  20import net.java.otr4j.OtrException;
  21import net.java.otr4j.session.Session;
  22import net.java.otr4j.session.SessionStatus;
  23import eu.siacs.conversations.Config;
  24import eu.siacs.conversations.R;
  25import eu.siacs.conversations.crypto.PgpEngine;
  26import eu.siacs.conversations.entities.Account;
  27import eu.siacs.conversations.entities.Bookmark;
  28import eu.siacs.conversations.entities.Contact;
  29import eu.siacs.conversations.entities.Conversation;
  30import eu.siacs.conversations.entities.Downloadable;
  31import eu.siacs.conversations.entities.Message;
  32import eu.siacs.conversations.entities.MucOptions;
  33import eu.siacs.conversations.entities.MucOptions.OnRenameListener;
  34import eu.siacs.conversations.entities.Presences;
  35import eu.siacs.conversations.generator.IqGenerator;
  36import eu.siacs.conversations.generator.MessageGenerator;
  37import eu.siacs.conversations.generator.PresenceGenerator;
  38import eu.siacs.conversations.http.HttpConnectionManager;
  39import eu.siacs.conversations.parser.IqParser;
  40import eu.siacs.conversations.parser.MessageParser;
  41import eu.siacs.conversations.parser.PresenceParser;
  42import eu.siacs.conversations.persistance.DatabaseBackend;
  43import eu.siacs.conversations.persistance.FileBackend;
  44import eu.siacs.conversations.ui.UiCallback;
  45import eu.siacs.conversations.utils.CryptoHelper;
  46import eu.siacs.conversations.utils.ExceptionHelper;
  47import eu.siacs.conversations.utils.OnPhoneContactsLoadedListener;
  48import eu.siacs.conversations.utils.PRNGFixes;
  49import eu.siacs.conversations.utils.PhoneHelper;
  50import eu.siacs.conversations.utils.UIHelper;
  51import eu.siacs.conversations.xml.Element;
  52import eu.siacs.conversations.xmpp.OnBindListener;
  53import eu.siacs.conversations.xmpp.OnContactStatusChanged;
  54import eu.siacs.conversations.xmpp.OnIqPacketReceived;
  55import eu.siacs.conversations.xmpp.OnMessageAcknowledged;
  56import eu.siacs.conversations.xmpp.OnStatusChanged;
  57import eu.siacs.conversations.xmpp.XmppConnection;
  58import eu.siacs.conversations.xmpp.jid.InvalidJidException;
  59import eu.siacs.conversations.xmpp.jid.Jid;
  60import eu.siacs.conversations.xmpp.jingle.JingleConnectionManager;
  61import eu.siacs.conversations.xmpp.jingle.OnJinglePacketReceived;
  62import eu.siacs.conversations.xmpp.jingle.stanzas.JinglePacket;
  63import eu.siacs.conversations.xmpp.pep.Avatar;
  64import eu.siacs.conversations.xmpp.stanzas.IqPacket;
  65import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
  66import eu.siacs.conversations.xmpp.stanzas.PresencePacket;
  67import android.annotation.SuppressLint;
  68import android.app.AlarmManager;
  69import android.app.PendingIntent;
  70import android.app.Service;
  71import android.content.Context;
  72import android.content.Intent;
  73import android.content.SharedPreferences;
  74import android.database.ContentObserver;
  75import android.graphics.Bitmap;
  76import android.net.ConnectivityManager;
  77import android.net.NetworkInfo;
  78import android.net.Uri;
  79import android.os.Binder;
  80import android.os.Bundle;
  81import android.os.FileObserver;
  82import android.os.IBinder;
  83import android.os.PowerManager;
  84import android.os.PowerManager.WakeLock;
  85import android.os.SystemClock;
  86import android.preference.PreferenceManager;
  87import android.provider.ContactsContract;
  88import android.util.Log;
  89import android.util.LruCache;
  90
  91public class XmppConnectionService extends Service {
  92
  93	public DatabaseBackend databaseBackend;
  94	private FileBackend fileBackend = new FileBackend(this);
  95
  96	private static String ACTION_MERGE_PHONE_CONTACTS = "merge_phone_contacts";
  97	public static String ACTION_CLEAR_NOTIFICATION = "clear_notification";
  98
  99	private MemorizingTrustManager mMemorizingTrustManager;
 100
 101	private NotificationService mNotificationService = new NotificationService(
 102			this);
 103
 104	private MessageParser mMessageParser = new MessageParser(this);
 105	private PresenceParser mPresenceParser = new PresenceParser(this);
 106	private IqParser mIqParser = new IqParser(this);
 107	private MessageGenerator mMessageGenerator = new MessageGenerator(this);
 108	private PresenceGenerator mPresenceGenerator = new PresenceGenerator(this);
 109
 110	private List<Account> accounts;
 111	private CopyOnWriteArrayList<Conversation> conversations = null;
 112	private JingleConnectionManager mJingleConnectionManager = new JingleConnectionManager(
 113			this);
 114	private HttpConnectionManager mHttpConnectionManager = new HttpConnectionManager(
 115			this);
 116	private AvatarService mAvatarService = new AvatarService(this);
 117
 118	private OnConversationUpdate mOnConversationUpdate = null;
 119	private Integer convChangedListenerCount = 0;
 120	private OnAccountUpdate mOnAccountUpdate = null;
 121	private Integer accountChangedListenerCount = 0;
 122	private OnRosterUpdate mOnRosterUpdate = null;
 123	private Integer rosterChangedListenerCount = 0;
 124	public OnContactStatusChanged onContactStatusChanged = new OnContactStatusChanged() {
 125
 126		@Override
 127		public void onContactStatusChanged(Contact contact, boolean online) {
 128			Conversation conversation = find(getConversations(), contact);
 129			if (conversation != null) {
 130				if (online && contact.getPresences().size() > 1) {
 131					conversation.endOtrIfNeeded();
 132				} else {
 133					conversation.resetOtrSession();
 134				}
 135				if (online && (contact.getPresences().size() == 1)) {
 136					sendUnsendMessages(conversation);
 137				}
 138			}
 139		}
 140	};
 141
 142	private SecureRandom mRandom;
 143
 144	private ContentObserver contactObserver = new ContentObserver(null) {
 145		@Override
 146		public void onChange(boolean selfChange) {
 147			super.onChange(selfChange);
 148			Intent intent = new Intent(getApplicationContext(),
 149					XmppConnectionService.class);
 150			intent.setAction(ACTION_MERGE_PHONE_CONTACTS);
 151			startService(intent);
 152		}
 153	};
 154
 155	private FileObserver fileObserver = new FileObserver(
 156			FileBackend.getConversationsDirectory()) {
 157
 158		@Override
 159		public void onEvent(int event, String path) {
 160			if (event == FileObserver.DELETE) {
 161				markFileDeleted(path.split("\\.")[0]);
 162			}
 163		}
 164	};
 165
 166	private final IBinder mBinder = new XmppConnectionBinder();
 167	private OnStatusChanged statusListener = new OnStatusChanged() {
 168
 169		@Override
 170		public void onStatusChanged(Account account) {
 171			XmppConnection connection = account.getXmppConnection();
 172			if (mOnAccountUpdate != null) {
 173				mOnAccountUpdate.onAccountUpdate();
 174			}
 175			if (account.getStatus() == Account.STATUS_ONLINE) {
 176				for (Conversation conversation : account.pendingConferenceLeaves) {
 177					leaveMuc(conversation);
 178				}
 179				for (Conversation conversation : account.pendingConferenceJoins) {
 180					joinMuc(conversation);
 181				}
 182				mJingleConnectionManager.cancelInTransmission();
 183				List<Conversation> conversations = getConversations();
 184                for (Conversation conversation : conversations) {
 185                    if (conversation.getAccount() == account) {
 186                        conversation.startOtrIfNeeded();
 187                        sendUnsendMessages(conversation);
 188                    }
 189                }
 190				if (connection != null && connection.getFeatures().csi()) {
 191					if (checkListeners()) {
 192						Log.d(Config.LOGTAG, account.getJid()
 193								+ " sending csi//inactive");
 194						connection.sendInactive();
 195					} else {
 196						Log.d(Config.LOGTAG, account.getJid()
 197								+ " sending csi//active");
 198						connection.sendActive();
 199					}
 200				}
 201				syncDirtyContacts(account);
 202				scheduleWakeupCall(Config.PING_MAX_INTERVAL, true);
 203			} else if (account.getStatus() == Account.STATUS_OFFLINE) {
 204				resetSendingToWaiting(account);
 205				if (!account.isOptionSet(Account.OPTION_DISABLED)) {
 206					int timeToReconnect = mRandom.nextInt(50) + 10;
 207					scheduleWakeupCall(timeToReconnect, false);
 208				}
 209			} else if (account.getStatus() == Account.STATUS_REGISTRATION_SUCCESSFULL) {
 210				databaseBackend.updateAccount(account);
 211				reconnectAccount(account, true);
 212			} else if ((account.getStatus() != Account.STATUS_CONNECTING)
 213					&& (account.getStatus() != Account.STATUS_NO_INTERNET)) {
 214				if (connection != null) {
 215					int next = connection.getTimeToNextAttempt();
 216					Log.d(Config.LOGTAG, account.getJid()
 217							+ ": error connecting account. try again in "
 218							+ next + "s for the "
 219							+ (connection.getAttempt() + 1) + " time");
 220					scheduleWakeupCall((int) (next * 1.2), false);
 221				}
 222			}
 223			UIHelper.showErrorNotification(getApplicationContext(),
 224					getAccounts());
 225		}
 226	};
 227
 228	private OnJinglePacketReceived jingleListener = new OnJinglePacketReceived() {
 229
 230		@Override
 231		public void onJinglePacketReceived(Account account, JinglePacket packet) {
 232			mJingleConnectionManager.deliverPacket(account, packet);
 233		}
 234	};
 235
 236	private OpenPgpServiceConnection pgpServiceConnection;
 237	private PgpEngine mPgpEngine = null;
 238	private Intent pingIntent;
 239	private PendingIntent pendingPingIntent = null;
 240	private WakeLock wakeLock;
 241	private PowerManager pm;
 242	private OnBindListener mOnBindListener = new OnBindListener() {
 243
 244		@Override
 245		public void onBind(final Account account) {
 246			account.getRoster().clearPresences();
 247			account.clearPresences(); // self presences
 248			account.pendingConferenceJoins.clear();
 249			account.pendingConferenceLeaves.clear();
 250			fetchRosterFromServer(account);
 251			fetchBookmarks(account);
 252			sendPresencePacket(account,
 253					mPresenceGenerator.sendPresence(account));
 254			connectMultiModeConversations(account);
 255			updateConversationUi();
 256		}
 257	};
 258
 259	private OnMessageAcknowledged mOnMessageAcknowledgedListener = new OnMessageAcknowledged() {
 260
 261		@Override
 262		public void onMessageAcknowledged(Account account, String uuid) {
 263			for (Conversation conversation : getConversations()) {
 264				if (conversation.getAccount() == account) {
 265					for (Message message : conversation.getMessages()) {
 266						if ((message.getStatus() == Message.STATUS_UNSEND || message
 267								.getStatus() == Message.STATUS_WAITING)
 268								&& message.getUuid().equals(uuid)) {
 269							markMessage(message, Message.STATUS_SEND);
 270							return;
 271						}
 272					}
 273				}
 274			}
 275		}
 276	};
 277	private LruCache<String, Bitmap> mBitmapCache;
 278
 279	public PgpEngine getPgpEngine() {
 280		if (pgpServiceConnection.isBound()) {
 281			if (this.mPgpEngine == null) {
 282				this.mPgpEngine = new PgpEngine(new OpenPgpApi(
 283						getApplicationContext(),
 284						pgpServiceConnection.getService()), this);
 285			}
 286			return mPgpEngine;
 287		} else {
 288			return null;
 289		}
 290
 291	}
 292
 293	public FileBackend getFileBackend() {
 294		return this.fileBackend;
 295	}
 296
 297	public AvatarService getAvatarService() {
 298		return this.mAvatarService;
 299	}
 300
 301	public Message attachImageToConversation(final Conversation conversation,
 302			final Uri uri, final UiCallback<Message> callback) {
 303		final Message message;
 304		if (conversation.getNextEncryption(forceEncryption()) == Message.ENCRYPTION_PGP) {
 305			message = new Message(conversation, "",
 306					Message.ENCRYPTION_DECRYPTED);
 307		} else {
 308			message = new Message(conversation, "",
 309					conversation.getNextEncryption(forceEncryption()));
 310		}
 311		message.setPresence(conversation.getNextPresence());
 312		message.setType(Message.TYPE_IMAGE);
 313		message.setStatus(Message.STATUS_OFFERED);
 314		new Thread(new Runnable() {
 315
 316			@Override
 317			public void run() {
 318				try {
 319					getFileBackend().copyImageToPrivateStorage(message, uri);
 320					if (conversation.getNextEncryption(forceEncryption()) == Message.ENCRYPTION_PGP) {
 321						getPgpEngine().encrypt(message, callback);
 322					} else {
 323						callback.success(message);
 324					}
 325				} catch (FileBackend.ImageCopyException e) {
 326					callback.error(e.getResId(), message);
 327				}
 328			}
 329		}).start();
 330		return message;
 331	}
 332
 333	public Conversation find(Bookmark bookmark) {
 334		return find(bookmark.getAccount(), bookmark.getJid());
 335	}
 336
 337	public Conversation find(final Account account, final Jid jid) {
 338		return find(getConversations(), account, jid);
 339	}
 340
 341	public class XmppConnectionBinder extends Binder {
 342		public XmppConnectionService getService() {
 343			return XmppConnectionService.this;
 344		}
 345	}
 346
 347	@Override
 348	public int onStartCommand(Intent intent, int flags, int startId) {
 349		if (intent != null && intent.getAction() != null) {
 350			if (intent.getAction().equals(ACTION_MERGE_PHONE_CONTACTS)) {
 351				mergePhoneContactsWithRoster();
 352				return START_STICKY;
 353			} else if (intent.getAction().equals(Intent.ACTION_SHUTDOWN)) {
 354				logoutAndSave();
 355				return START_NOT_STICKY;
 356			} else if (intent.getAction().equals(ACTION_CLEAR_NOTIFICATION)) {
 357				mNotificationService.clear();
 358			}
 359		}
 360		this.wakeLock.acquire();
 361
 362		for (Account account : accounts) {
 363			if (!account.isOptionSet(Account.OPTION_DISABLED)) {
 364				if (!hasInternetConnection()) {
 365					account.setStatus(Account.STATUS_NO_INTERNET);
 366					if (statusListener != null) {
 367						statusListener.onStatusChanged(account);
 368					}
 369				} else {
 370					if (account.getStatus() == Account.STATUS_NO_INTERNET) {
 371						account.setStatus(Account.STATUS_OFFLINE);
 372						if (statusListener != null) {
 373							statusListener.onStatusChanged(account);
 374						}
 375					}
 376					if (account.getStatus() == Account.STATUS_ONLINE) {
 377						long lastReceived = account.getXmppConnection()
 378								.getLastPacketReceived();
 379						long lastSent = account.getXmppConnection()
 380								.getLastPingSent();
 381						if (lastSent - lastReceived >= Config.PING_TIMEOUT * 1000) {
 382							Log.d(Config.LOGTAG, account.getJid()
 383									+ ": ping timeout");
 384							this.reconnectAccount(account, true);
 385						} else if (SystemClock.elapsedRealtime() - lastReceived >= Config.PING_MIN_INTERVAL * 1000) {
 386							account.getXmppConnection().sendPing();
 387							this.scheduleWakeupCall(2, false);
 388						}
 389					} else if (account.getStatus() == Account.STATUS_OFFLINE) {
 390						if (account.getXmppConnection() == null) {
 391							account.setXmppConnection(this
 392									.createConnection(account));
 393						}
 394						new Thread(account.getXmppConnection()).start();
 395					} else if ((account.getStatus() == Account.STATUS_CONNECTING)
 396							&& ((SystemClock.elapsedRealtime() - account
 397									.getXmppConnection().getLastConnect()) / 1000 >= Config.CONNECT_TIMEOUT)) {
 398						Log.d(Config.LOGTAG, account.getJid()
 399								+ ": time out during connect reconnecting");
 400						reconnectAccount(account, true);
 401					} else {
 402						if (account.getXmppConnection().getTimeToNextAttempt() <= 0) {
 403							reconnectAccount(account, true);
 404						}
 405					}
 406					// in any case. reschedule wakup call
 407					this.scheduleWakeupCall(Config.PING_MAX_INTERVAL, true);
 408				}
 409				if (mOnAccountUpdate != null) {
 410					mOnAccountUpdate.onAccountUpdate();
 411				}
 412			}
 413		}
 414		if (wakeLock.isHeld()) {
 415			try {
 416				wakeLock.release();
 417			} catch (final RuntimeException ignored) {
 418			}
 419		}
 420		return START_STICKY;
 421	}
 422
 423	public boolean hasInternetConnection() {
 424		ConnectivityManager cm = (ConnectivityManager) getApplicationContext()
 425				.getSystemService(Context.CONNECTIVITY_SERVICE);
 426		NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
 427		return activeNetwork != null && activeNetwork.isConnected();
 428	}
 429
 430	@SuppressLint("TrulyRandom")
 431	@Override
 432	public void onCreate() {
 433		ExceptionHelper.init(getApplicationContext());
 434		PRNGFixes.apply();
 435		this.mRandom = new SecureRandom();
 436		this.mMemorizingTrustManager = new MemorizingTrustManager(
 437				getApplicationContext());
 438
 439		int maxMemory = (int) (Runtime.getRuntime().maxMemory() / 1024);
 440		int cacheSize = maxMemory / 8;
 441		this.mBitmapCache = new LruCache<String, Bitmap>(cacheSize) {
 442			@Override
 443			protected int sizeOf(String key, Bitmap bitmap) {
 444				return bitmap.getByteCount() / 1024;
 445			}
 446		};
 447
 448		this.databaseBackend = DatabaseBackend
 449				.getInstance(getApplicationContext());
 450		this.accounts = databaseBackend.getAccounts();
 451
 452		for (Account account : this.accounts) {
 453			this.databaseBackend.readRoster(account.getRoster());
 454		}
 455		this.mergePhoneContactsWithRoster();
 456		this.getConversations();
 457
 458		getContentResolver().registerContentObserver(
 459				ContactsContract.Contacts.CONTENT_URI, true, contactObserver);
 460		this.fileObserver.startWatching();
 461		this.pgpServiceConnection = new OpenPgpServiceConnection(
 462				getApplicationContext(), "org.sufficientlysecure.keychain");
 463		this.pgpServiceConnection.bindToService();
 464
 465		this.pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
 466		this.wakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK,
 467				"XmppConnectionService");
 468	}
 469
 470	@Override
 471	public void onDestroy() {
 472		super.onDestroy();
 473		this.logoutAndSave();
 474	}
 475
 476	@Override
 477	public void onTaskRemoved(Intent rootIntent) {
 478		super.onTaskRemoved(rootIntent);
 479		this.logoutAndSave();
 480	}
 481
 482	private void logoutAndSave() {
 483		for (Account account : accounts) {
 484			databaseBackend.writeRoster(account.getRoster());
 485			if (account.getXmppConnection() != null) {
 486				disconnect(account, false);
 487			}
 488		}
 489		Context context = getApplicationContext();
 490		AlarmManager alarmManager = (AlarmManager) context
 491				.getSystemService(Context.ALARM_SERVICE);
 492		Intent intent = new Intent(context, EventReceiver.class);
 493		alarmManager.cancel(PendingIntent.getBroadcast(context, 0, intent, 0));
 494		Log.d(Config.LOGTAG, "good bye");
 495		stopSelf();
 496	}
 497
 498	protected void scheduleWakeupCall(int seconds, boolean ping) {
 499		long timeToWake = SystemClock.elapsedRealtime() + seconds * 1000;
 500		Context context = getApplicationContext();
 501		AlarmManager alarmManager = (AlarmManager) context
 502				.getSystemService(Context.ALARM_SERVICE);
 503
 504		if (ping) {
 505			if (this.pingIntent == null) {
 506				this.pingIntent = new Intent(context, EventReceiver.class);
 507				this.pingIntent.setAction("ping");
 508				this.pingIntent.putExtra("time", timeToWake);
 509				this.pendingPingIntent = PendingIntent.getBroadcast(context, 0,
 510						this.pingIntent, 0);
 511				alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP,
 512						timeToWake, pendingPingIntent);
 513			} else {
 514				long scheduledTime = this.pingIntent.getLongExtra("time", 0);
 515				if (scheduledTime < SystemClock.elapsedRealtime()
 516						|| (scheduledTime > timeToWake)) {
 517					this.pingIntent.putExtra("time", timeToWake);
 518					alarmManager.cancel(this.pendingPingIntent);
 519					this.pendingPingIntent = PendingIntent.getBroadcast(
 520							context, 0, this.pingIntent, 0);
 521					alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP,
 522							timeToWake, pendingPingIntent);
 523				}
 524			}
 525		} else {
 526			Intent intent = new Intent(context, EventReceiver.class);
 527			intent.setAction("ping_check");
 528			PendingIntent alarmIntent = PendingIntent.getBroadcast(context, 0,
 529					intent, 0);
 530			alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP, timeToWake,
 531					alarmIntent);
 532		}
 533
 534	}
 535
 536	public XmppConnection createConnection(Account account) {
 537		SharedPreferences sharedPref = getPreferences();
 538        try {
 539            account.setResource(sharedPref.getString("resource", "mobile")
 540                    .toLowerCase(Locale.getDefault()));
 541        } catch (final InvalidJidException ignored) {
 542        }
 543        XmppConnection connection = new XmppConnection(account, this);
 544		connection.setOnMessagePacketReceivedListener(this.mMessageParser);
 545		connection.setOnStatusChangedListener(this.statusListener);
 546		connection.setOnPresencePacketReceivedListener(this.mPresenceParser);
 547		connection.setOnUnregisteredIqPacketReceivedListener(this.mIqParser);
 548		connection.setOnJinglePacketReceivedListener(this.jingleListener);
 549		connection.setOnBindListener(this.mOnBindListener);
 550		connection
 551				.setOnMessageAcknowledgeListener(this.mOnMessageAcknowledgedListener);
 552		return connection;
 553	}
 554
 555	public void sendMessage(Message message) {
 556		Account account = message.getConversation().getAccount();
 557		account.deactivateGracePeriod();
 558		Conversation conv = message.getConversation();
 559		MessagePacket packet = null;
 560		boolean saveInDb = true;
 561		boolean send = false;
 562		if (account.getStatus() == Account.STATUS_ONLINE
 563				&& account.getXmppConnection() != null) {
 564			if (message.getType() == Message.TYPE_IMAGE) {
 565				if (message.getPresence() != null) {
 566					if (message.getEncryption() == Message.ENCRYPTION_OTR) {
 567						if (!conv.hasValidOtrSession()
 568								&& (message.getPresence() != null)) {
 569							conv.startOtrSession(this, message.getPresence(),
 570									true);
 571							message.setStatus(Message.STATUS_WAITING);
 572						} else if (conv.hasValidOtrSession()
 573								&& conv.getOtrSession().getSessionStatus() == SessionStatus.ENCRYPTED) {
 574							mJingleConnectionManager
 575									.createNewConnection(message);
 576						}
 577					} else {
 578						mJingleConnectionManager.createNewConnection(message);
 579					}
 580				} else {
 581					if (message.getEncryption() == Message.ENCRYPTION_OTR) {
 582						conv.startOtrIfNeeded();
 583					}
 584					message.setStatus(Message.STATUS_WAITING);
 585				}
 586			} else {
 587				if (message.getEncryption() == Message.ENCRYPTION_OTR) {
 588					if (!conv.hasValidOtrSession()
 589							&& (message.getPresence() != null)) {
 590						conv.startOtrSession(this, message.getPresence(), true);
 591						message.setStatus(Message.STATUS_WAITING);
 592					} else if (conv.hasValidOtrSession()
 593							&& conv.getOtrSession().getSessionStatus() == SessionStatus.ENCRYPTED) {
 594						message.setPresence(conv.getOtrSession().getSessionID()
 595								.getUserID());
 596						packet = mMessageGenerator.generateOtrChat(message);
 597						send = true;
 598
 599					} else if (message.getPresence() == null) {
 600						conv.startOtrIfNeeded();
 601						message.setStatus(Message.STATUS_WAITING);
 602					}
 603				} else if (message.getEncryption() == Message.ENCRYPTION_DECRYPTED) {
 604					message.getConversation().endOtrIfNeeded();
 605					failWaitingOtrMessages(message.getConversation());
 606					packet = mMessageGenerator.generatePgpChat(message);
 607					send = true;
 608				} else {
 609					message.getConversation().endOtrIfNeeded();
 610					failWaitingOtrMessages(message.getConversation());
 611					packet = mMessageGenerator.generateChat(message);
 612					send = true;
 613				}
 614			}
 615			if (!account.getXmppConnection().getFeatures().sm()
 616					&& conv.getMode() != Conversation.MODE_MULTI) {
 617				message.setStatus(Message.STATUS_SEND);
 618			}
 619		} else {
 620			message.setStatus(Message.STATUS_WAITING);
 621			if (message.getType() == Message.TYPE_TEXT) {
 622				if (message.getEncryption() == Message.ENCRYPTION_DECRYPTED) {
 623					String pgpBody = message.getEncryptedBody();
 624					String decryptedBody = message.getBody();
 625					message.setBody(pgpBody);
 626					message.setEncryption(Message.ENCRYPTION_PGP);
 627					databaseBackend.createMessage(message);
 628					saveInDb = false;
 629					message.setBody(decryptedBody);
 630					message.setEncryption(Message.ENCRYPTION_DECRYPTED);
 631				} else if (message.getEncryption() == Message.ENCRYPTION_OTR) {
 632					if (conv.hasValidOtrSession()) {
 633						message.setPresence(conv.getOtrSession().getSessionID()
 634								.getUserID());
 635					} else if (!conv.hasValidOtrSession()
 636							&& message.getPresence() != null) {
 637						conv.startOtrSession(this, message.getPresence(), false);
 638					}
 639				}
 640			}
 641
 642		}
 643		conv.add(message);
 644		if (saveInDb) {
 645			if (message.getEncryption() == Message.ENCRYPTION_NONE
 646					|| saveEncryptedMessages()) {
 647				databaseBackend.createMessage(message);
 648			}
 649		}
 650		if ((send) && (packet != null)) {
 651			sendMessagePacket(account, packet);
 652		}
 653		updateConversationUi();
 654	}
 655
 656	private void sendUnsendMessages(Conversation conversation) {
 657		for (int i = 0; i < conversation.getMessages().size(); ++i) {
 658			int status = conversation.getMessages().get(i).getStatus();
 659			if (status == Message.STATUS_WAITING) {
 660				resendMessage(conversation.getMessages().get(i));
 661			}
 662		}
 663	}
 664
 665	private void resendMessage(Message message) {
 666		Account account = message.getConversation().getAccount();
 667		MessagePacket packet = null;
 668		if (message.getEncryption() == Message.ENCRYPTION_OTR) {
 669			Presences presences = message.getConversation().getContact()
 670					.getPresences();
 671			if (!message.getConversation().hasValidOtrSession()) {
 672				if ((message.getPresence() != null)
 673						&& (presences.has(message.getPresence()))) {
 674					message.getConversation().startOtrSession(this,
 675							message.getPresence(), true);
 676				} else {
 677					if (presences.size() == 1) {
 678						String presence = presences.asStringArray()[0];
 679						message.getConversation().startOtrSession(this,
 680								presence, true);
 681					}
 682				}
 683			} else {
 684				if (message.getConversation().getOtrSession()
 685						.getSessionStatus() == SessionStatus.ENCRYPTED) {
 686					if (message.getType() == Message.TYPE_TEXT) {
 687						packet = mMessageGenerator.generateOtrChat(message,
 688								true);
 689					} else if (message.getType() == Message.TYPE_IMAGE) {
 690						mJingleConnectionManager.createNewConnection(message);
 691					}
 692				}
 693			}
 694		} else if (message.getType() == Message.TYPE_TEXT) {
 695			if (message.getEncryption() == Message.ENCRYPTION_NONE) {
 696				packet = mMessageGenerator.generateChat(message, true);
 697			} else if ((message.getEncryption() == Message.ENCRYPTION_DECRYPTED)
 698					|| (message.getEncryption() == Message.ENCRYPTION_PGP)) {
 699				packet = mMessageGenerator.generatePgpChat(message, true);
 700			}
 701		} else if (message.getType() == Message.TYPE_IMAGE) {
 702			Presences presences = message.getConversation().getContact()
 703					.getPresences();
 704			if ((message.getPresence() != null)
 705					&& (presences.has(message.getPresence()))) {
 706				markMessage(message, Message.STATUS_OFFERED);
 707				mJingleConnectionManager.createNewConnection(message);
 708			} else {
 709				if (presences.size() == 1) {
 710					String presence = presences.asStringArray()[0];
 711					message.setPresence(presence);
 712					markMessage(message, Message.STATUS_OFFERED);
 713					mJingleConnectionManager.createNewConnection(message);
 714				}
 715			}
 716		}
 717		if (packet != null) {
 718			if (!account.getXmppConnection().getFeatures().sm()
 719					&& message.getConversation().getMode() != Conversation.MODE_MULTI) {
 720				markMessage(message, Message.STATUS_SEND);
 721			} else {
 722				markMessage(message, Message.STATUS_UNSEND);
 723			}
 724			sendMessagePacket(account, packet);
 725		}
 726	}
 727
 728	public void fetchRosterFromServer(Account account) {
 729		IqPacket iqPacket = new IqPacket(IqPacket.TYPE_GET);
 730		if (!"".equals(account.getRosterVersion())) {
 731			Log.d(Config.LOGTAG, account.getJid()
 732					+ ": fetching roster version " + account.getRosterVersion());
 733		} else {
 734			Log.d(Config.LOGTAG, account.getJid() + ": fetching roster");
 735		}
 736		iqPacket.query("jabber:iq:roster").setAttribute("ver",
 737				account.getRosterVersion());
 738		account.getXmppConnection().sendIqPacket(iqPacket,
 739				new OnIqPacketReceived() {
 740
 741					@Override
 742					public void onIqPacketReceived(final Account account,
 743							IqPacket packet) {
 744						Element query = packet.findChild("query");
 745						if (query != null) {
 746							account.getRoster().markAllAsNotInRoster();
 747							mIqParser.rosterItems(account, query);
 748						}
 749					}
 750				});
 751	}
 752
 753	public void fetchBookmarks(Account account) {
 754		IqPacket iqPacket = new IqPacket(IqPacket.TYPE_GET);
 755		Element query = iqPacket.query("jabber:iq:private");
 756		query.addChild("storage", "storage:bookmarks");
 757		OnIqPacketReceived callback = new OnIqPacketReceived() {
 758
 759			@Override
 760			public void onIqPacketReceived(Account account, IqPacket packet) {
 761				Element query = packet.query();
 762				List<Bookmark> bookmarks = new CopyOnWriteArrayList<>();
 763				Element storage = query.findChild("storage",
 764						"storage:bookmarks");
 765				if (storage != null) {
 766					for (Element item : storage.getChildren()) {
 767						if (item.getName().equals("conference")) {
 768							Bookmark bookmark = Bookmark.parse(item, account);
 769							bookmarks.add(bookmark);
 770							Conversation conversation = find(bookmark);
 771							if (conversation != null) {
 772								conversation.setBookmark(bookmark);
 773							} else {
 774								if (bookmark.autojoin()) {
 775									conversation = findOrCreateConversation(
 776											account, bookmark.getJid(), true);
 777									conversation.setBookmark(bookmark);
 778									joinMuc(conversation);
 779								}
 780							}
 781						}
 782					}
 783				}
 784				account.setBookmarks(bookmarks);
 785			}
 786		};
 787		sendIqPacket(account, iqPacket, callback);
 788
 789	}
 790
 791	public void pushBookmarks(Account account) {
 792		IqPacket iqPacket = new IqPacket(IqPacket.TYPE_SET);
 793		Element query = iqPacket.query("jabber:iq:private");
 794		Element storage = query.addChild("storage", "storage:bookmarks");
 795		for (Bookmark bookmark : account.getBookmarks()) {
 796			storage.addChild(bookmark);
 797		}
 798		sendIqPacket(account, iqPacket, null);
 799	}
 800
 801	private void mergePhoneContactsWithRoster() {
 802		PhoneHelper.loadPhoneContacts(getApplicationContext(),
 803				new OnPhoneContactsLoadedListener() {
 804					@Override
 805					public void onPhoneContactsLoaded(List<Bundle> phoneContacts) {
 806						for (Account account : accounts) {
 807							account.getRoster().clearSystemAccounts();
 808						}
 809						for (Bundle phoneContact : phoneContacts) {
 810							for (Account account : accounts) {
 811                                Jid jid;
 812                                try {
 813                                    jid = Jid.fromString(phoneContact.getString("jid"));
 814                                } catch (final InvalidJidException e) {
 815                                    // TODO: Warn if contact import fails here?
 816                                    break;
 817                                }
 818                                final Contact contact = account.getRoster()
 819										.getContact(jid);
 820								String systemAccount = phoneContact
 821										.getInt("phoneid")
 822										+ "#"
 823										+ phoneContact.getString("lookup");
 824								contact.setSystemAccount(systemAccount);
 825								contact.setPhotoUri(phoneContact
 826										.getString("photouri"));
 827								contact.setSystemName(phoneContact
 828										.getString("displayname"));
 829								getAvatarService().clear(contact);
 830							}
 831						}
 832					}
 833				});
 834	}
 835
 836	public List<Conversation> getConversations() {
 837		if (this.conversations == null) {
 838			Hashtable<String, Account> accountLookupTable = new Hashtable<>();
 839			for (Account account : this.accounts) {
 840				accountLookupTable.put(account.getUuid(), account);
 841			}
 842			this.conversations = databaseBackend
 843					.getConversations(Conversation.STATUS_AVAILABLE);
 844			for (Conversation conv : this.conversations) {
 845				Account account = accountLookupTable.get(conv.getAccountUuid());
 846				conv.setAccount(account);
 847				conv.setMessages(databaseBackend.getMessages(conv, 50));
 848				checkDeletedFiles(conv);
 849			}
 850		}
 851		return this.conversations;
 852	}
 853
 854	private void checkDeletedFiles(Conversation conversation) {
 855		for (Message message : conversation.getMessages()) {
 856			if (message.getType() == Message.TYPE_IMAGE
 857					&& message.getEncryption() != Message.ENCRYPTION_PGP) {
 858				if (!getFileBackend().isFileAvailable(message)) {
 859					message.setDownloadable(new DeletedDownloadable());
 860				}
 861			}
 862		}
 863	}
 864
 865	private void markFileDeleted(String uuid) {
 866		for (Conversation conversation : getConversations()) {
 867			for (Message message : conversation.getMessages()) {
 868				if (message.getType() == Message.TYPE_IMAGE
 869						&& message.getEncryption() != Message.ENCRYPTION_PGP
 870						&& message.getUuid().equals(uuid)) {
 871					if (!getFileBackend().isFileAvailable(message)) {
 872						message.setDownloadable(new DeletedDownloadable());
 873						updateConversationUi();
 874					}
 875					return;
 876				}
 877			}
 878		}
 879	}
 880
 881	public void populateWithOrderedConversations(List<Conversation> list) {
 882		populateWithOrderedConversations(list, true);
 883	}
 884
 885	public void populateWithOrderedConversations(List<Conversation> list,
 886			boolean includeConferences) {
 887		list.clear();
 888		if (includeConferences) {
 889			list.addAll(getConversations());
 890		} else {
 891			for (Conversation conversation : getConversations()) {
 892				if (conversation.getMode() == Conversation.MODE_SINGLE) {
 893					list.add(conversation);
 894				}
 895			}
 896		}
 897		Collections.sort(list, new Comparator<Conversation>() {
 898			@Override
 899			public int compare(Conversation lhs, Conversation rhs) {
 900				Message left = lhs.getLatestMessage();
 901				Message right = rhs.getLatestMessage();
 902				if (left.getTimeSent() > right.getTimeSent()) {
 903					return -1;
 904				} else if (left.getTimeSent() < right.getTimeSent()) {
 905					return 1;
 906				} else {
 907					return 0;
 908				}
 909			}
 910		});
 911	}
 912
 913	public int loadMoreMessages(Conversation conversation, long timestamp) {
 914		List<Message> messages = databaseBackend.getMessages(conversation, 50,
 915				timestamp);
 916		for (Message message : messages) {
 917			message.setConversation(conversation);
 918		}
 919		conversation.addAll(0, messages);
 920		return messages.size();
 921	}
 922
 923	public List<Account> getAccounts() {
 924		return this.accounts;
 925	}
 926
 927	public Conversation find(List<Conversation> haystack, Contact contact) {
 928		for (Conversation conversation : haystack) {
 929			if (conversation.getContact() == contact) {
 930				return conversation;
 931			}
 932		}
 933		return null;
 934	}
 935
 936	public Conversation find(final List<Conversation> haystack,
 937                             final Account account,
 938                             final Jid jid) {
 939		for (Conversation conversation : haystack) {
 940			if ((account == null || conversation.getAccount() == account)
 941					&& (conversation.getContactJid().toBareJid().equals(jid.toBareJid()))) {
 942				return conversation;
 943			}
 944		}
 945		return null;
 946	}
 947
 948	public Conversation findOrCreateConversation(final Account account, final Jid jid,
 949			final boolean muc) {
 950		Conversation conversation = find(account, jid);
 951		if (conversation != null) {
 952			return conversation;
 953		}
 954		conversation = databaseBackend.findConversation(account, jid);
 955		if (conversation != null) {
 956			conversation.setStatus(Conversation.STATUS_AVAILABLE);
 957			conversation.setAccount(account);
 958			if (muc) {
 959				conversation.setMode(Conversation.MODE_MULTI);
 960			} else {
 961				conversation.setMode(Conversation.MODE_SINGLE);
 962			}
 963			conversation.setMessages(databaseBackend.getMessages(conversation,
 964					50));
 965			this.databaseBackend.updateConversation(conversation);
 966		} else {
 967			String conversationName;
 968			Contact contact = account.getRoster().getContact(jid);
 969			if (contact != null) {
 970				conversationName = contact.getDisplayName();
 971			} else {
 972				conversationName = jid.getLocalpart();
 973			}
 974			if (muc) {
 975				conversation = new Conversation(conversationName, account, jid,
 976						Conversation.MODE_MULTI);
 977			} else {
 978				conversation = new Conversation(conversationName, account, jid,
 979						Conversation.MODE_SINGLE);
 980			}
 981			this.databaseBackend.createConversation(conversation);
 982		}
 983		this.conversations.add(conversation);
 984		updateConversationUi();
 985		return conversation;
 986	}
 987
 988	public void archiveConversation(Conversation conversation) {
 989		if (conversation.getMode() == Conversation.MODE_MULTI) {
 990			if (conversation.getAccount().getStatus() == Account.STATUS_ONLINE) {
 991				Bookmark bookmark = conversation.getBookmark();
 992				if (bookmark != null && bookmark.autojoin()) {
 993					bookmark.setAutojoin(false);
 994					pushBookmarks(bookmark.getAccount());
 995				}
 996			}
 997			leaveMuc(conversation);
 998		} else {
 999			conversation.endOtrIfNeeded();
1000		}
1001		this.databaseBackend.updateConversation(conversation);
1002		this.conversations.remove(conversation);
1003		updateConversationUi();
1004	}
1005
1006	public void clearConversationHistory(Conversation conversation) {
1007		this.databaseBackend.deleteMessagesInConversation(conversation);
1008		conversation.getMessages().clear();
1009		updateConversationUi();
1010	}
1011
1012	public int getConversationCount() {
1013		return this.databaseBackend.getConversationCount();
1014	}
1015
1016	public void createAccount(Account account) {
1017		databaseBackend.createAccount(account);
1018		this.accounts.add(account);
1019		this.reconnectAccount(account, false);
1020		updateAccountUi();
1021	}
1022
1023	public void updateAccount(Account account) {
1024		this.statusListener.onStatusChanged(account);
1025		databaseBackend.updateAccount(account);
1026		reconnectAccount(account, false);
1027		updateAccountUi();
1028		UIHelper.showErrorNotification(getApplicationContext(), getAccounts());
1029	}
1030
1031	public void deleteAccount(Account account) {
1032		for (Conversation conversation : conversations) {
1033			if (conversation.getAccount() == account) {
1034				if (conversation.getMode() == Conversation.MODE_MULTI) {
1035					leaveMuc(conversation);
1036				} else if (conversation.getMode() == Conversation.MODE_SINGLE) {
1037					conversation.endOtrIfNeeded();
1038				}
1039				conversations.remove(conversation);
1040			}
1041		}
1042		if (account.getXmppConnection() != null) {
1043			this.disconnect(account, true);
1044		}
1045		databaseBackend.deleteAccount(account);
1046		this.accounts.remove(account);
1047		updateAccountUi();
1048		UIHelper.showErrorNotification(getApplicationContext(), getAccounts());
1049	}
1050
1051	public void setOnConversationListChangedListener(
1052			OnConversationUpdate listener) {
1053		if (!isScreenOn()) {
1054			Log.d(Config.LOGTAG,
1055					"ignoring setOnConversationListChangedListener");
1056			return;
1057		}
1058		synchronized (this.convChangedListenerCount) {
1059			if (checkListeners()) {
1060				switchToForeground();
1061			}
1062			this.mOnConversationUpdate = listener;
1063			this.mNotificationService.setIsInForeground(true);
1064			this.convChangedListenerCount++;
1065		}
1066	}
1067
1068	public void removeOnConversationListChangedListener() {
1069		synchronized (this.convChangedListenerCount) {
1070			this.convChangedListenerCount--;
1071			if (this.convChangedListenerCount <= 0) {
1072				this.convChangedListenerCount = 0;
1073				this.mOnConversationUpdate = null;
1074				this.mNotificationService.setIsInForeground(false);
1075				if (checkListeners()) {
1076					switchToBackground();
1077				}
1078			}
1079		}
1080	}
1081
1082	public void setOnAccountListChangedListener(OnAccountUpdate listener) {
1083		if (!isScreenOn()) {
1084			Log.d(Config.LOGTAG, "ignoring setOnAccountListChangedListener");
1085			return;
1086		}
1087		synchronized (this.accountChangedListenerCount) {
1088			if (checkListeners()) {
1089				switchToForeground();
1090			}
1091			this.mOnAccountUpdate = listener;
1092			this.accountChangedListenerCount++;
1093		}
1094	}
1095
1096	public void removeOnAccountListChangedListener() {
1097		synchronized (this.accountChangedListenerCount) {
1098			this.accountChangedListenerCount--;
1099			if (this.accountChangedListenerCount <= 0) {
1100				this.mOnAccountUpdate = null;
1101				this.accountChangedListenerCount = 0;
1102				if (checkListeners()) {
1103					switchToBackground();
1104				}
1105			}
1106		}
1107	}
1108
1109	public void setOnRosterUpdateListener(OnRosterUpdate listener) {
1110		if (!isScreenOn()) {
1111			Log.d(Config.LOGTAG, "ignoring setOnRosterUpdateListener");
1112			return;
1113		}
1114		synchronized (this.rosterChangedListenerCount) {
1115			if (checkListeners()) {
1116				switchToForeground();
1117			}
1118			this.mOnRosterUpdate = listener;
1119			this.rosterChangedListenerCount++;
1120		}
1121	}
1122
1123	public void removeOnRosterUpdateListener() {
1124		synchronized (this.rosterChangedListenerCount) {
1125			this.rosterChangedListenerCount--;
1126			if (this.rosterChangedListenerCount <= 0) {
1127				this.rosterChangedListenerCount = 0;
1128				this.mOnRosterUpdate = null;
1129				if (checkListeners()) {
1130					switchToBackground();
1131				}
1132			}
1133		}
1134	}
1135
1136	private boolean checkListeners() {
1137		return (this.mOnAccountUpdate == null
1138				&& this.mOnConversationUpdate == null && this.mOnRosterUpdate == null);
1139	}
1140
1141	private void switchToForeground() {
1142		for (Account account : getAccounts()) {
1143			if (account.getStatus() == Account.STATUS_ONLINE) {
1144				XmppConnection connection = account.getXmppConnection();
1145				if (connection != null && connection.getFeatures().csi()) {
1146					connection.sendActive();
1147				}
1148			}
1149		}
1150		Log.d(Config.LOGTAG, "app switched into foreground");
1151	}
1152
1153	private void switchToBackground() {
1154		for (Account account : getAccounts()) {
1155			if (account.getStatus() == Account.STATUS_ONLINE) {
1156				XmppConnection connection = account.getXmppConnection();
1157				if (connection != null && connection.getFeatures().csi()) {
1158					connection.sendInactive();
1159				}
1160			}
1161		}
1162		this.mNotificationService.setIsInForeground(false);
1163		Log.d(Config.LOGTAG, "app switched into background");
1164	}
1165
1166	private boolean isScreenOn() {
1167		PowerManager pm = (PowerManager) this
1168				.getSystemService(Context.POWER_SERVICE);
1169		return pm.isScreenOn();
1170	}
1171
1172	public void connectMultiModeConversations(Account account) {
1173		List<Conversation> conversations = getConversations();
1174        for (Conversation conversation : conversations) {
1175            if ((conversation.getMode() == Conversation.MODE_MULTI)
1176                    && (conversation.getAccount() == account)) {
1177                joinMuc(conversation);
1178            }
1179        }
1180	}
1181
1182	public void joinMuc(Conversation conversation) {
1183		Account account = conversation.getAccount();
1184		account.pendingConferenceJoins.remove(conversation);
1185		account.pendingConferenceLeaves.remove(conversation);
1186		if (account.getStatus() == Account.STATUS_ONLINE) {
1187			Log.d(Config.LOGTAG,
1188					"joining conversation " + conversation.getContactJid());
1189			String nick = conversation.getMucOptions().getProposedNick();
1190			conversation.getMucOptions().setJoinNick(nick);
1191			PresencePacket packet = new PresencePacket();
1192			final Jid joinJid = conversation.getMucOptions().getJoinJid();
1193            packet.setTo(conversation.getMucOptions().getJoinJid());
1194			Element x = new Element("x");
1195			x.setAttribute("xmlns", "http://jabber.org/protocol/muc");
1196			if (conversation.getMucOptions().getPassword() != null) {
1197				Element password = x.addChild("password");
1198				password.setContent(conversation.getMucOptions().getPassword());
1199			}
1200			String sig = account.getPgpSignature();
1201			if (sig != null) {
1202				packet.addChild("status").setContent("online");
1203				packet.addChild("x", "jabber:x:signed").setContent(sig);
1204			}
1205			if (conversation.getMessages().size() != 0) {
1206				final SimpleDateFormat mDateFormat = new SimpleDateFormat(
1207						"yyyy-MM-dd'T'HH:mm:ss.SSS'Z'", Locale.US);
1208				mDateFormat.setTimeZone(TimeZone.getTimeZone("UTC"));
1209				Date date = new Date(conversation.getLatestMessage()
1210						.getTimeSent() + 1000);
1211				x.addChild("history").setAttribute("since",
1212						mDateFormat.format(date));
1213			}
1214			packet.addChild(x);
1215			sendPresencePacket(account, packet);
1216			if (!joinJid.equals(conversation.getContactJid())) {
1217				conversation.setContactJid(joinJid);
1218				databaseBackend.updateConversation(conversation);
1219			}
1220		} else {
1221			account.pendingConferenceJoins.add(conversation);
1222		}
1223	}
1224
1225	private OnRenameListener renameListener = null;
1226	private IqGenerator mIqGenerator = new IqGenerator(this);
1227
1228	public void setOnRenameListener(OnRenameListener listener) {
1229		this.renameListener = listener;
1230	}
1231
1232	public void providePasswordForMuc(Conversation conversation, String password) {
1233		if (conversation.getMode() == Conversation.MODE_MULTI) {
1234			conversation.getMucOptions().setPassword(password);
1235			if (conversation.getBookmark() != null) {
1236				conversation.getBookmark().setAutojoin(true);
1237				pushBookmarks(conversation.getAccount());
1238			}
1239			databaseBackend.updateConversation(conversation);
1240			joinMuc(conversation);
1241		}
1242	}
1243
1244	public void renameInMuc(final Conversation conversation, final String nick) {
1245		final MucOptions options = conversation.getMucOptions();
1246		options.setJoinNick(nick);
1247		if (options.online()) {
1248			Account account = conversation.getAccount();
1249			options.setOnRenameListener(new OnRenameListener() {
1250
1251				@Override
1252				public void onRename(boolean success) {
1253					if (renameListener != null) {
1254						renameListener.onRename(success);
1255					}
1256					if (success) {
1257						conversation.setContactJid(conversation.getMucOptions()
1258								.getJoinJid());
1259						databaseBackend.updateConversation(conversation);
1260						Bookmark bookmark = conversation.getBookmark();
1261						if (bookmark != null) {
1262							bookmark.setNick(nick);
1263							pushBookmarks(bookmark.getAccount());
1264						}
1265					}
1266				}
1267			});
1268			options.flagAboutToRename();
1269			PresencePacket packet = new PresencePacket();
1270			packet.setTo(options.getJoinJid());
1271			packet.setFrom(conversation.getAccount().getFullJid());
1272
1273			String sig = account.getPgpSignature();
1274			if (sig != null) {
1275				packet.addChild("status").setContent("online");
1276				packet.addChild("x", "jabber:x:signed").setContent(sig);
1277			}
1278			sendPresencePacket(account, packet);
1279		} else {
1280			conversation.setContactJid(options.getJoinJid());
1281			databaseBackend.updateConversation(conversation);
1282			if (conversation.getAccount().getStatus() == Account.STATUS_ONLINE) {
1283				Bookmark bookmark = conversation.getBookmark();
1284				if (bookmark != null) {
1285					bookmark.setNick(nick);
1286					pushBookmarks(bookmark.getAccount());
1287				}
1288				joinMuc(conversation);
1289			}
1290		}
1291	}
1292
1293	public void leaveMuc(Conversation conversation) {
1294		Account account = conversation.getAccount();
1295		account.pendingConferenceJoins.remove(conversation);
1296		account.pendingConferenceLeaves.remove(conversation);
1297		if (account.getStatus() == Account.STATUS_ONLINE) {
1298			PresencePacket packet = new PresencePacket();
1299			packet.setTo(conversation.getMucOptions().getJoinJid());
1300			packet.setFrom(conversation.getAccount().getFullJid());
1301			packet.setAttribute("type", "unavailable");
1302			sendPresencePacket(conversation.getAccount(), packet);
1303			conversation.getMucOptions().setOffline();
1304			conversation.deregisterWithBookmark();
1305			Log.d(Config.LOGTAG, conversation.getAccount().getJid()
1306					+ ": leaving muc " + conversation.getContactJid());
1307		} else {
1308			account.pendingConferenceLeaves.add(conversation);
1309		}
1310	}
1311
1312	public void disconnect(Account account, boolean force) {
1313		if ((account.getStatus() == Account.STATUS_ONLINE)
1314				|| (account.getStatus() == Account.STATUS_DISABLED)) {
1315			if (!force) {
1316				List<Conversation> conversations = getConversations();
1317                for (Conversation conversation : conversations) {
1318                    if (conversation.getAccount() == account) {
1319                        if (conversation.getMode() == Conversation.MODE_MULTI) {
1320                            leaveMuc(conversation);
1321                        } else {
1322                            if (conversation.endOtrIfNeeded()) {
1323                                Log.d(Config.LOGTAG, account.getJid()
1324                                        + ": ended otr session with "
1325                                        + conversation.getContactJid());
1326                            }
1327                        }
1328                    }
1329                }
1330			}
1331			account.getXmppConnection().disconnect(force);
1332		}
1333	}
1334
1335	@Override
1336	public IBinder onBind(Intent intent) {
1337		return mBinder;
1338	}
1339
1340	public void updateMessage(Message message) {
1341		databaseBackend.updateMessage(message);
1342		updateConversationUi();
1343	}
1344
1345	protected void syncDirtyContacts(Account account) {
1346		for (Contact contact : account.getRoster().getContacts()) {
1347			if (contact.getOption(Contact.Options.DIRTY_PUSH)) {
1348				pushContactToServer(contact);
1349			}
1350			if (contact.getOption(Contact.Options.DIRTY_DELETE)) {
1351				deleteContactOnServer(contact);
1352			}
1353		}
1354	}
1355
1356	public void createContact(Contact contact) {
1357		SharedPreferences sharedPref = getPreferences();
1358		boolean autoGrant = sharedPref.getBoolean("grant_new_contacts", true);
1359		if (autoGrant) {
1360			contact.setOption(Contact.Options.PREEMPTIVE_GRANT);
1361			contact.setOption(Contact.Options.ASKING);
1362		}
1363		pushContactToServer(contact);
1364	}
1365
1366	public void onOtrSessionEstablished(Conversation conversation) {
1367		Account account = conversation.getAccount();
1368		List<Message> messages = conversation.getMessages();
1369		Session otrSession = conversation.getOtrSession();
1370		Log.d(Config.LOGTAG,
1371				account.getJid() + " otr session established with "
1372						+ conversation.getContactJid() + "/"
1373						+ otrSession.getSessionID().getUserID());
1374        for (Message msg : messages) {
1375            if ((msg.getStatus() == Message.STATUS_UNSEND || msg.getStatus() == Message.STATUS_WAITING)
1376                    && (msg.getEncryption() == Message.ENCRYPTION_OTR)) {
1377                msg.setPresence(otrSession.getSessionID().getUserID());
1378                if (msg.getType() == Message.TYPE_TEXT) {
1379                    MessagePacket outPacket = mMessageGenerator
1380                            .generateOtrChat(msg, true);
1381                    if (outPacket != null) {
1382                        msg.setStatus(Message.STATUS_SEND);
1383                        databaseBackend.updateMessage(msg);
1384                        sendMessagePacket(account, outPacket);
1385                    }
1386                } else if (msg.getType() == Message.TYPE_IMAGE) {
1387                    mJingleConnectionManager.createNewConnection(msg);
1388                }
1389            }
1390        }
1391		updateConversationUi();
1392	}
1393
1394	public boolean renewSymmetricKey(Conversation conversation) {
1395		Account account = conversation.getAccount();
1396		byte[] symmetricKey = new byte[32];
1397		this.mRandom.nextBytes(symmetricKey);
1398		Session otrSession = conversation.getOtrSession();
1399		if (otrSession != null) {
1400			MessagePacket packet = new MessagePacket();
1401			packet.setType(MessagePacket.TYPE_CHAT);
1402			packet.setFrom(account.getFullJid());
1403			packet.addChild("private", "urn:xmpp:carbons:2");
1404			packet.addChild("no-copy", "urn:xmpp:hints");
1405			packet.setAttribute("to", otrSession.getSessionID().getAccountID() + "/"
1406                    + otrSession.getSessionID().getUserID());
1407			try {
1408				packet.setBody(otrSession
1409						.transformSending(CryptoHelper.FILETRANSFER
1410								+ CryptoHelper.bytesToHex(symmetricKey)));
1411				sendMessagePacket(account, packet);
1412				conversation.setSymmetricKey(symmetricKey);
1413				return true;
1414			} catch (OtrException e) {
1415				return false;
1416			}
1417		}
1418		return false;
1419	}
1420
1421	public void pushContactToServer(Contact contact) {
1422		contact.resetOption(Contact.Options.DIRTY_DELETE);
1423		contact.setOption(Contact.Options.DIRTY_PUSH);
1424		Account account = contact.getAccount();
1425		if (account.getStatus() == Account.STATUS_ONLINE) {
1426			boolean ask = contact.getOption(Contact.Options.ASKING);
1427			boolean sendUpdates = contact
1428					.getOption(Contact.Options.PENDING_SUBSCRIPTION_REQUEST)
1429					&& contact.getOption(Contact.Options.PREEMPTIVE_GRANT);
1430			IqPacket iq = new IqPacket(IqPacket.TYPE_SET);
1431			iq.query("jabber:iq:roster").addChild(contact.asElement());
1432			account.getXmppConnection().sendIqPacket(iq, null);
1433			if (sendUpdates) {
1434				sendPresencePacket(account,
1435						mPresenceGenerator.sendPresenceUpdatesTo(contact));
1436			}
1437			if (ask) {
1438				sendPresencePacket(account,
1439						mPresenceGenerator.requestPresenceUpdatesFrom(contact));
1440			}
1441		}
1442	}
1443
1444	public void publishAvatar(Account account, Uri image,
1445			final UiCallback<Avatar> callback) {
1446		final Bitmap.CompressFormat format = Config.AVATAR_FORMAT;
1447		final int size = Config.AVATAR_SIZE;
1448		final Avatar avatar = getFileBackend()
1449				.getPepAvatar(image, size, format);
1450		if (avatar != null) {
1451			avatar.height = size;
1452			avatar.width = size;
1453			if (format.equals(Bitmap.CompressFormat.WEBP)) {
1454				avatar.type = "image/webp";
1455			} else if (format.equals(Bitmap.CompressFormat.JPEG)) {
1456				avatar.type = "image/jpeg";
1457			} else if (format.equals(Bitmap.CompressFormat.PNG)) {
1458				avatar.type = "image/png";
1459			}
1460			if (!getFileBackend().save(avatar)) {
1461				callback.error(R.string.error_saving_avatar, avatar);
1462				return;
1463			}
1464			IqPacket packet = this.mIqGenerator.publishAvatar(avatar);
1465			this.sendIqPacket(account, packet, new OnIqPacketReceived() {
1466
1467				@Override
1468				public void onIqPacketReceived(Account account, IqPacket result) {
1469					if (result.getType() == IqPacket.TYPE_RESULT) {
1470						IqPacket packet = XmppConnectionService.this.mIqGenerator
1471								.publishAvatarMetadata(avatar);
1472						sendIqPacket(account, packet, new OnIqPacketReceived() {
1473
1474							@Override
1475							public void onIqPacketReceived(Account account,
1476									IqPacket result) {
1477								if (result.getType() == IqPacket.TYPE_RESULT) {
1478									if (account.setAvatar(avatar.getFilename())) {
1479										databaseBackend.updateAccount(account);
1480									}
1481									callback.success(avatar);
1482								} else {
1483									callback.error(
1484											R.string.error_publish_avatar_server_reject,
1485											avatar);
1486								}
1487							}
1488						});
1489					} else {
1490						callback.error(
1491								R.string.error_publish_avatar_server_reject,
1492								avatar);
1493					}
1494				}
1495			});
1496		} else {
1497			callback.error(R.string.error_publish_avatar_converting, null);
1498		}
1499	}
1500
1501	public void fetchAvatar(Account account, Avatar avatar) {
1502		fetchAvatar(account, avatar, null);
1503	}
1504
1505	public void fetchAvatar(Account account, final Avatar avatar,
1506			final UiCallback<Avatar> callback) {
1507		IqPacket packet = this.mIqGenerator.retrieveAvatar(avatar);
1508		sendIqPacket(account, packet, new OnIqPacketReceived() {
1509
1510			@Override
1511			public void onIqPacketReceived(Account account, IqPacket result) {
1512				final String ERROR = account.getJid()
1513						+ ": fetching avatar for " + avatar.owner + " failed ";
1514				if (result.getType() == IqPacket.TYPE_RESULT) {
1515					avatar.image = mIqParser.avatarData(result);
1516					if (avatar.image != null) {
1517						if (getFileBackend().save(avatar)) {
1518							if (account.getJid().equals(avatar.owner)) {
1519								if (account.setAvatar(avatar.getFilename())) {
1520									databaseBackend.updateAccount(account);
1521								}
1522								getAvatarService().clear(account);
1523								updateConversationUi();
1524								updateAccountUi();
1525							} else {
1526								Contact contact = account.getRoster()
1527										.getContact(avatar.owner);
1528								contact.setAvatar(avatar.getFilename());
1529								getAvatarService().clear(contact);
1530								updateConversationUi();
1531								updateRosterUi();
1532							}
1533							if (callback != null) {
1534								callback.success(avatar);
1535							}
1536							Log.d(Config.LOGTAG, account.getJid()
1537									+ ": succesfully fetched avatar for "
1538									+ avatar.owner);
1539							return;
1540						}
1541					} else {
1542
1543						Log.d(Config.LOGTAG, ERROR + "(parsing error)");
1544					}
1545				} else {
1546					Element error = result.findChild("error");
1547					if (error == null) {
1548						Log.d(Config.LOGTAG, ERROR + "(server error)");
1549					} else {
1550						Log.d(Config.LOGTAG, ERROR + error.toString());
1551					}
1552				}
1553				if (callback != null) {
1554					callback.error(0, null);
1555				}
1556
1557			}
1558		});
1559	}
1560
1561	public void checkForAvatar(Account account,
1562			final UiCallback<Avatar> callback) {
1563		IqPacket packet = this.mIqGenerator.retrieveAvatarMetaData(null);
1564		this.sendIqPacket(account, packet, new OnIqPacketReceived() {
1565
1566			@Override
1567			public void onIqPacketReceived(Account account, IqPacket packet) {
1568				if (packet.getType() == IqPacket.TYPE_RESULT) {
1569					Element pubsub = packet.findChild("pubsub",
1570							"http://jabber.org/protocol/pubsub");
1571					if (pubsub != null) {
1572						Element items = pubsub.findChild("items");
1573						if (items != null) {
1574							Avatar avatar = Avatar.parseMetadata(items);
1575							if (avatar != null) {
1576								avatar.owner = account.getJid();
1577								if (fileBackend.isAvatarCached(avatar)) {
1578									if (account.setAvatar(avatar.getFilename())) {
1579										databaseBackend.updateAccount(account);
1580									}
1581									getAvatarService().clear(account);
1582									callback.success(avatar);
1583								} else {
1584									fetchAvatar(account, avatar, callback);
1585								}
1586								return;
1587							}
1588						}
1589					}
1590				}
1591				callback.error(0, null);
1592			}
1593		});
1594	}
1595
1596	public void deleteContactOnServer(Contact contact) {
1597		contact.resetOption(Contact.Options.PREEMPTIVE_GRANT);
1598		contact.resetOption(Contact.Options.DIRTY_PUSH);
1599		contact.setOption(Contact.Options.DIRTY_DELETE);
1600		Account account = contact.getAccount();
1601		if (account.getStatus() == Account.STATUS_ONLINE) {
1602			IqPacket iq = new IqPacket(IqPacket.TYPE_SET);
1603			Element item = iq.query("jabber:iq:roster").addChild("item");
1604			item.setAttribute("jid", contact.getJid().toString());
1605			item.setAttribute("subscription", "remove");
1606			account.getXmppConnection().sendIqPacket(iq, null);
1607		}
1608	}
1609
1610	public void updateConversation(Conversation conversation) {
1611		this.databaseBackend.updateConversation(conversation);
1612	}
1613
1614	public void reconnectAccount(final Account account, final boolean force) {
1615		new Thread(new Runnable() {
1616
1617			@Override
1618			public void run() {
1619				if (account.getXmppConnection() != null) {
1620					disconnect(account, force);
1621				}
1622				if (!account.isOptionSet(Account.OPTION_DISABLED)) {
1623					if (account.getXmppConnection() == null) {
1624						account.setXmppConnection(createConnection(account));
1625					}
1626					Thread thread = new Thread(account.getXmppConnection());
1627					thread.start();
1628					scheduleWakeupCall((int) (Config.CONNECT_TIMEOUT * 1.2),
1629							false);
1630				} else {
1631					account.getRoster().clearPresences();
1632					account.setXmppConnection(null);
1633				}
1634			}
1635		}).start();
1636	}
1637
1638	public void invite(Conversation conversation, String contact) {
1639		MessagePacket packet = mMessageGenerator.invite(conversation, contact);
1640		sendMessagePacket(conversation.getAccount(), packet);
1641	}
1642
1643	public void resetSendingToWaiting(Account account) {
1644		for (Conversation conversation : getConversations()) {
1645			if (conversation.getAccount() == account) {
1646				for (Message message : conversation.getMessages()) {
1647					if (message.getType() != Message.TYPE_IMAGE
1648							&& message.getStatus() == Message.STATUS_UNSEND) {
1649						markMessage(message, Message.STATUS_WAITING);
1650					}
1651				}
1652			}
1653		}
1654	}
1655
1656	public boolean markMessage(final Account account, final Jid recipient, final String uuid,
1657			final int status) {
1658		if (uuid == null) {
1659			return false;
1660		} else {
1661			for (Conversation conversation : getConversations()) {
1662				if (conversation.getContactJid().equals(recipient)
1663						&& conversation.getAccount().equals(account)) {
1664					return markMessage(conversation, uuid, status);
1665				}
1666			}
1667			return false;
1668		}
1669	}
1670
1671	public boolean markMessage(Conversation conversation, String uuid,
1672			int status) {
1673		if (uuid == null) {
1674			return false;
1675		} else {
1676			for (Message message : conversation.getMessages()) {
1677				if (uuid.equals(message.getUuid())
1678						|| (message.getStatus() >= Message.STATUS_SEND && uuid
1679								.equals(message.getRemoteMsgId()))) {
1680					markMessage(message, status);
1681					return true;
1682				}
1683			}
1684			return false;
1685		}
1686	}
1687
1688	public void markMessage(Message message, int status) {
1689		if (status == Message.STATUS_SEND_FAILED
1690				&& (message.getStatus() == Message.STATUS_SEND_RECEIVED || message
1691						.getStatus() == Message.STATUS_SEND_DISPLAYED)) {
1692			return;
1693		}
1694		message.setStatus(status);
1695		databaseBackend.updateMessage(message);
1696		updateConversationUi();
1697	}
1698
1699	public SharedPreferences getPreferences() {
1700		return PreferenceManager
1701				.getDefaultSharedPreferences(getApplicationContext());
1702	}
1703
1704	public boolean forceEncryption() {
1705		return getPreferences().getBoolean("force_encryption", false);
1706	}
1707
1708	public boolean confirmMessages() {
1709		return getPreferences().getBoolean("confirm_messages", true);
1710	}
1711
1712	public boolean saveEncryptedMessages() {
1713		return !getPreferences().getBoolean("dont_save_encrypted", false);
1714	}
1715
1716	public boolean indicateReceived() {
1717		return getPreferences().getBoolean("indicate_received", false);
1718	}
1719
1720	public void updateConversationUi() {
1721		if (mOnConversationUpdate != null) {
1722			mOnConversationUpdate.onConversationUpdate();
1723		}
1724	}
1725
1726	public void updateAccountUi() {
1727		if (mOnAccountUpdate != null) {
1728			mOnAccountUpdate.onAccountUpdate();
1729		}
1730	}
1731
1732	public void updateRosterUi() {
1733		if (mOnRosterUpdate != null) {
1734			mOnRosterUpdate.onRosterUpdate();
1735		}
1736	}
1737
1738	public Account findAccountByJid(final Jid accountJid) {
1739		for (Account account : this.accounts) {
1740			if (account.getJid().equals(accountJid)) {
1741				return account;
1742			}
1743		}
1744		return null;
1745	}
1746
1747	public Conversation findConversationByUuid(String uuid) {
1748		for (Conversation conversation : getConversations()) {
1749			if (conversation.getUuid().equals(uuid)) {
1750				return conversation;
1751			}
1752		}
1753		return null;
1754	}
1755
1756	public void markRead(Conversation conversation, boolean calledByUi) {
1757		mNotificationService.clear(conversation);
1758		String id = conversation.getLatestMarkableMessageId();
1759		conversation.markRead();
1760		if (confirmMessages() && id != null && calledByUi) {
1761			Log.d(Config.LOGTAG, conversation.getAccount().getJid()
1762					+ ": sending read marker for " + conversation.getName());
1763			Account account = conversation.getAccount();
1764			final Jid to = conversation.getContactJid();
1765			this.sendMessagePacket(conversation.getAccount(),
1766					mMessageGenerator.confirm(account, to, id));
1767		}
1768		if (!calledByUi) {
1769			updateConversationUi();
1770		}
1771	}
1772
1773	public void failWaitingOtrMessages(Conversation conversation) {
1774		for (Message message : conversation.getMessages()) {
1775			if (message.getEncryption() == Message.ENCRYPTION_OTR
1776					&& message.getStatus() == Message.STATUS_WAITING) {
1777				markMessage(message, Message.STATUS_SEND_FAILED);
1778			}
1779		}
1780	}
1781
1782	public SecureRandom getRNG() {
1783		return this.mRandom;
1784	}
1785
1786	public MemorizingTrustManager getMemorizingTrustManager() {
1787		return this.mMemorizingTrustManager;
1788	}
1789
1790	public PowerManager getPowerManager() {
1791		return this.pm;
1792	}
1793
1794	public LruCache<String, Bitmap> getBitmapCache() {
1795		return this.mBitmapCache;
1796	}
1797
1798	public void replyWithNotAcceptable(Account account, MessagePacket packet) {
1799		if (account.getStatus() == Account.STATUS_ONLINE) {
1800			MessagePacket error = this.mMessageGenerator
1801					.generateNotAcceptable(packet);
1802			sendMessagePacket(account, error);
1803		}
1804	}
1805
1806	public void syncRosterToDisk(final Account account) {
1807		new Thread(new Runnable() {
1808
1809			@Override
1810			public void run() {
1811				databaseBackend.writeRoster(account.getRoster());
1812			}
1813		}).start();
1814
1815	}
1816
1817	public List<String> getKnownHosts() {
1818		List<String> hosts = new ArrayList<>();
1819		for (Account account : getAccounts()) {
1820			if (!hosts.contains(account.getServer().toString())) {
1821				hosts.add(account.getServer().toString());
1822			}
1823			for (Contact contact : account.getRoster().getContacts()) {
1824				if (contact.showInRoster()) {
1825					final String server = contact.getServer().toString();
1826					if (server != null && !hosts.contains(server)) {
1827						hosts.add(server);
1828					}
1829				}
1830			}
1831		}
1832		return hosts;
1833	}
1834
1835	public List<String> getKnownConferenceHosts() {
1836		ArrayList<String> mucServers = new ArrayList<>();
1837		for (Account account : accounts) {
1838			if (account.getXmppConnection() != null) {
1839				String server = account.getXmppConnection().getMucServer();
1840				if (server != null && !mucServers.contains(server)) {
1841					mucServers.add(server);
1842				}
1843			}
1844		}
1845		return mucServers;
1846	}
1847
1848	public void sendMessagePacket(Account account, MessagePacket packet) {
1849		XmppConnection connection = account.getXmppConnection();
1850		if (connection != null) {
1851			connection.sendMessagePacket(packet);
1852		}
1853	}
1854
1855	public void sendPresencePacket(Account account, PresencePacket packet) {
1856		XmppConnection connection = account.getXmppConnection();
1857		if (connection != null) {
1858			connection.sendPresencePacket(packet);
1859		}
1860	}
1861
1862	public void sendIqPacket(Account account, IqPacket packet,
1863			OnIqPacketReceived callback) {
1864		XmppConnection connection = account.getXmppConnection();
1865		if (connection != null) {
1866			connection.sendIqPacket(packet, callback);
1867		}
1868	}
1869
1870	public MessageGenerator getMessageGenerator() {
1871		return this.mMessageGenerator;
1872	}
1873
1874	public PresenceGenerator getPresenceGenerator() {
1875		return this.mPresenceGenerator;
1876	}
1877
1878	public IqGenerator getIqGenerator() {
1879		return this.mIqGenerator;
1880	}
1881
1882	public JingleConnectionManager getJingleConnectionManager() {
1883		return this.mJingleConnectionManager;
1884	}
1885
1886	public interface OnConversationUpdate {
1887		public void onConversationUpdate();
1888	}
1889
1890	public interface OnAccountUpdate {
1891		public void onAccountUpdate();
1892	}
1893
1894	public interface OnRosterUpdate {
1895		public void onRosterUpdate();
1896	}
1897
1898	public List<Contact> findContacts(String jid) {
1899		ArrayList<Contact> contacts = new ArrayList<>();
1900		for (Account account : getAccounts()) {
1901			if (!account.isOptionSet(Account.OPTION_DISABLED)) {
1902				Contact contact = account.getRoster().getContactFromRoster(jid);
1903				if (contact != null) {
1904					contacts.add(contact);
1905				}
1906			}
1907		}
1908		return contacts;
1909	}
1910
1911	public NotificationService getNotificationService() {
1912		return this.mNotificationService;
1913	}
1914
1915	public HttpConnectionManager getHttpConnectionManager() {
1916		return this.mHttpConnectionManager;
1917	}
1918
1919	private class DeletedDownloadable implements Downloadable {
1920
1921		@Override
1922		public boolean start() {
1923			return false;
1924		}
1925
1926		@Override
1927		public int getStatus() {
1928			return Downloadable.STATUS_DELETED;
1929		}
1930
1931		@Override
1932		public long getFileSize() {
1933			return 0;
1934		}
1935
1936	}
1937
1938	public void resendFailedMessages(Message message) {
1939		List<Message> messages = new ArrayList<>();
1940		Message current = message;
1941		while(current.getStatus() == Message.STATUS_SEND_FAILED) {
1942			messages.add(current);
1943			if (current.mergeable(current.next())) {
1944				current = current.next();
1945			} else {
1946				break;
1947			}
1948		}
1949		for(Message msg: messages) {
1950			markMessage(msg, Message.STATUS_WAITING);
1951			this.resendMessage(msg);
1952		}
1953	}
1954}