XmppConnectionService.java

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