conversations-classic/src/main/java/eu/siacs/conversations/services/XmppConnectionService.java

package eu.siacs.conversations.services;

import android.Manifest;
import android.annotation.SuppressLint;
import android.annotation.TargetApi;
import android.app.AlarmManager;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.app.Service;
import android.content.BroadcastReceiver;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.SharedPreferences;
import android.content.pm.PackageManager;
import android.database.ContentObserver;
import android.graphics.Bitmap;
import android.media.AudioManager;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.net.Uri;
import android.os.Binder;
import android.os.Build;
import android.os.Bundle;
import android.os.Environment;
import android.os.IBinder;
import android.os.PowerManager;
import android.os.PowerManager.WakeLock;
import android.os.SystemClock;
import android.preference.PreferenceManager;
import android.provider.ContactsContract;
import android.security.KeyChain;
import android.support.annotation.BoolRes;
import android.support.annotation.IntegerRes;
import android.support.v4.app.RemoteInput;
import android.support.v4.content.ContextCompat;
import android.text.TextUtils;
import android.util.DisplayMetrics;
import android.util.Log;
import android.util.LruCache;
import android.util.Pair;

import org.conscrypt.Conscrypt;
import org.openintents.openpgp.IOpenPgpService2;
import org.openintents.openpgp.util.OpenPgpApi;
import org.openintents.openpgp.util.OpenPgpServiceConnection;

import java.io.File;
import java.net.URL;
import java.security.SecureRandom;
import java.security.Security;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.List;
import java.util.ListIterator;
import java.util.Map;
import java.util.Set;
import java.util.WeakHashMap;
import java.util.concurrent.CopyOnWriteArrayList;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicLong;


import eu.siacs.conversations.Config;
import eu.siacs.conversations.R;
import eu.siacs.conversations.android.JabberIdContact;
import eu.siacs.conversations.crypto.OmemoSetting;
import eu.siacs.conversations.crypto.PgpDecryptionService;
import eu.siacs.conversations.crypto.PgpEngine;
import eu.siacs.conversations.crypto.axolotl.AxolotlService;
import eu.siacs.conversations.crypto.axolotl.FingerprintStatus;
import eu.siacs.conversations.crypto.axolotl.XmppAxolotlMessage;
import eu.siacs.conversations.entities.Account;
import eu.siacs.conversations.entities.Blockable;
import eu.siacs.conversations.entities.Bookmark;
import eu.siacs.conversations.entities.Contact;
import eu.siacs.conversations.entities.Conversation;
import eu.siacs.conversations.entities.Conversational;
import eu.siacs.conversations.entities.Message;
import eu.siacs.conversations.entities.MucOptions;
import eu.siacs.conversations.entities.MucOptions.OnRenameListener;
import eu.siacs.conversations.entities.Presence;
import eu.siacs.conversations.entities.PresenceTemplate;
import eu.siacs.conversations.entities.Roster;
import eu.siacs.conversations.entities.ServiceDiscoveryResult;
import eu.siacs.conversations.generator.AbstractGenerator;
import eu.siacs.conversations.generator.IqGenerator;
import eu.siacs.conversations.generator.MessageGenerator;
import eu.siacs.conversations.generator.PresenceGenerator;
import eu.siacs.conversations.http.HttpConnectionManager;
import eu.siacs.conversations.http.CustomURLStreamHandlerFactory;
import eu.siacs.conversations.parser.AbstractParser;
import eu.siacs.conversations.parser.IqParser;
import eu.siacs.conversations.parser.MessageParser;
import eu.siacs.conversations.parser.PresenceParser;
import eu.siacs.conversations.persistance.DatabaseBackend;
import eu.siacs.conversations.persistance.FileBackend;
import eu.siacs.conversations.ui.ChooseAccountForProfilePictureActivity;
import eu.siacs.conversations.ui.SettingsActivity;
import eu.siacs.conversations.ui.UiCallback;
import eu.siacs.conversations.ui.interfaces.OnAvatarPublication;
import eu.siacs.conversations.ui.interfaces.OnMediaLoaded;
import eu.siacs.conversations.ui.interfaces.OnSearchResultsAvailable;
import eu.siacs.conversations.utils.Compatibility;
import eu.siacs.conversations.utils.ConversationsFileObserver;
import eu.siacs.conversations.utils.CryptoHelper;
import eu.siacs.conversations.utils.ExceptionHelper;
import eu.siacs.conversations.utils.MimeUtils;
import eu.siacs.conversations.utils.PhoneHelper;
import eu.siacs.conversations.utils.QuickLoader;
import eu.siacs.conversations.utils.ReplacingSerialSingleThreadExecutor;
import eu.siacs.conversations.utils.ReplacingTaskManager;
import eu.siacs.conversations.utils.Resolver;
import eu.siacs.conversations.utils.SerialSingleThreadExecutor;
import eu.siacs.conversations.utils.StringUtils;
import eu.siacs.conversations.utils.WakeLockHelper;
import eu.siacs.conversations.xml.Namespace;
import eu.siacs.conversations.utils.XmppUri;
import eu.siacs.conversations.xml.Element;
import eu.siacs.conversations.xmpp.OnBindListener;
import eu.siacs.conversations.xmpp.OnContactStatusChanged;
import eu.siacs.conversations.xmpp.OnIqPacketReceived;
import eu.siacs.conversations.xmpp.OnKeyStatusUpdated;
import eu.siacs.conversations.xmpp.OnMessageAcknowledged;
import eu.siacs.conversations.xmpp.OnMessagePacketReceived;
import eu.siacs.conversations.xmpp.OnPresencePacketReceived;
import eu.siacs.conversations.xmpp.OnStatusChanged;
import eu.siacs.conversations.xmpp.OnUpdateBlocklist;
import eu.siacs.conversations.xmpp.Patches;
import eu.siacs.conversations.xmpp.XmppConnection;
import eu.siacs.conversations.xmpp.chatstate.ChatState;
import eu.siacs.conversations.xmpp.forms.Data;
import eu.siacs.conversations.xmpp.jingle.JingleConnectionManager;
import eu.siacs.conversations.xmpp.jingle.OnJinglePacketReceived;
import eu.siacs.conversations.xmpp.jingle.stanzas.JinglePacket;
import eu.siacs.conversations.xmpp.mam.MamReference;
import eu.siacs.conversations.xmpp.pep.Avatar;
import eu.siacs.conversations.xmpp.pep.PublishOptions;
import eu.siacs.conversations.xmpp.stanzas.IqPacket;
import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
import eu.siacs.conversations.xmpp.stanzas.PresencePacket;
import me.leolin.shortcutbadger.ShortcutBadger;
import rocks.xmpp.addr.Jid;

public class XmppConnectionService extends Service {

    public static final String ACTION_REPLY_TO_CONVERSATION = "reply_to_conversations";
    public static final String ACTION_MARK_AS_READ = "mark_as_read";
    public static final String ACTION_SNOOZE = "snooze";
    public static final String ACTION_CLEAR_NOTIFICATION = "clear_notification";
    public static final String ACTION_DISMISS_ERROR_NOTIFICATIONS = "dismiss_error";
    public static final String ACTION_TRY_AGAIN = "try_again";
    public static final String ACTION_IDLE_PING = "idle_ping";
    public static final String ACTION_FCM_TOKEN_REFRESH = "fcm_token_refresh";
    public static final String ACTION_FCM_MESSAGE_RECEIVED = "fcm_message_received";
    private static final String ACTION_POST_CONNECTIVITY_CHANGE = "eu.siacs.conversations.POST_CONNECTIVITY_CHANGE";

    private static final String SETTING_LAST_ACTIVITY_TS = "last_activity_timestamp";

    static {
        URL.setURLStreamHandlerFactory(new CustomURLStreamHandlerFactory());
    }

    public final CountDownLatch restoredFromDatabaseLatch = new CountDownLatch(1);
    private final SerialSingleThreadExecutor mFileAddingExecutor = new SerialSingleThreadExecutor("FileAdding");
    private final SerialSingleThreadExecutor mVideoCompressionExecutor = new SerialSingleThreadExecutor("VideoCompression");
    private final SerialSingleThreadExecutor mDatabaseWriterExecutor = new SerialSingleThreadExecutor("DatabaseWriter");
    private final SerialSingleThreadExecutor mDatabaseReaderExecutor = new SerialSingleThreadExecutor("DatabaseReader");
    private final SerialSingleThreadExecutor mNotificationExecutor = new SerialSingleThreadExecutor("NotificationExecutor");
    private final ReplacingTaskManager mRosterSyncTaskManager = new ReplacingTaskManager();
    private final IBinder mBinder = new XmppConnectionBinder();
    private final List<Conversation> conversations = new CopyOnWriteArrayList<>();
    private final IqGenerator mIqGenerator = new IqGenerator(this);
    private final Set<String> mInProgressAvatarFetches = new HashSet<>();
    private final Set<String> mOmittedPepAvatarFetches = new HashSet<>();
    private final HashSet<Jid> mLowPingTimeoutMode = new HashSet<>();
    private final OnIqPacketReceived mDefaultIqHandler = (account, packet) -> {
        if (packet.getType() != IqPacket.TYPE.RESULT) {
            Element error = packet.findChild("error");
            String text = error != null ? error.findChildContent("text") : null;
            if (text != null) {
                Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": received iq error - " + text);
            }
        }
    };
    public DatabaseBackend databaseBackend;
    private ReplacingSerialSingleThreadExecutor mContactMergerExecutor = new ReplacingSerialSingleThreadExecutor("ContactMerger");
    private long mLastActivity = 0;
    private FileBackend fileBackend = new FileBackend(this);
    private MemorizingTrustManager mMemorizingTrustManager;
    private NotificationService mNotificationService = new NotificationService(this);
    private ShortcutService mShortcutService = new ShortcutService(this);
    private AtomicBoolean mInitialAddressbookSyncCompleted = new AtomicBoolean(false);
    private AtomicBoolean mForceForegroundService = new AtomicBoolean(false);
    private AtomicBoolean mForceDuringOnCreate = new AtomicBoolean(false);
    private OnMessagePacketReceived mMessageParser = new MessageParser(this);
    private OnPresencePacketReceived mPresenceParser = new PresenceParser(this);
    private IqParser mIqParser = new IqParser(this);
    private MessageGenerator mMessageGenerator = new MessageGenerator(this);
    public OnContactStatusChanged onContactStatusChanged = (contact, online) -> {
        Conversation conversation = find(getConversations(), contact);
        if (conversation != null) {
            if (online) {
                if (contact.getPresences().size() == 1) {
                    sendUnsentMessages(conversation);
                }
            }
        }
    };
    private PresenceGenerator mPresenceGenerator = new PresenceGenerator(this);
    private List<Account> accounts;
    private JingleConnectionManager mJingleConnectionManager = new JingleConnectionManager(
            this);
    private final OnJinglePacketReceived jingleListener = new OnJinglePacketReceived() {

        @Override
        public void onJinglePacketReceived(Account account, JinglePacket packet) {
            mJingleConnectionManager.deliverPacket(account, packet);
        }
    };
    private HttpConnectionManager mHttpConnectionManager = new HttpConnectionManager(this);
    private AvatarService mAvatarService = new AvatarService(this);
    private MessageArchiveService mMessageArchiveService = new MessageArchiveService(this);
    private PushManagementService mPushManagementService = new PushManagementService(this);
    private QuickConversationsService mQuickConversationsService = new QuickConversationsService(this);
    private final ConversationsFileObserver fileObserver = new ConversationsFileObserver(
            Environment.getExternalStorageDirectory().getAbsolutePath()
    ) {
        @Override
        public void onEvent(int event, String path) {
            markFileDeleted(path);
        }
    };
    private final OnMessageAcknowledged mOnMessageAcknowledgedListener = new OnMessageAcknowledged() {

        @Override
        public boolean onMessageAcknowledged(Account account, String uuid) {
            for (final Conversation conversation : getConversations()) {
                if (conversation.getAccount() == account) {
                    Message message = conversation.findUnsentMessageWithUuid(uuid);
                    if (message != null) {
                        message.setStatus(Message.STATUS_SEND);
                        message.setErrorMessage(null);
                        databaseBackend.updateMessage(message, false);
                        return true;
                    }
                }
            }
            return false;
        }
    };

    private boolean destroyed = false;

    private int unreadCount = -1;

    //Ui callback listeners
    private final Set<OnConversationUpdate> mOnConversationUpdates = Collections.newSetFromMap(new WeakHashMap<OnConversationUpdate, Boolean>());
    private final Set<OnShowErrorToast> mOnShowErrorToasts = Collections.newSetFromMap(new WeakHashMap<OnShowErrorToast, Boolean>());
    private final Set<OnAccountUpdate> mOnAccountUpdates = Collections.newSetFromMap(new WeakHashMap<OnAccountUpdate, Boolean>());
    private final Set<OnCaptchaRequested> mOnCaptchaRequested = Collections.newSetFromMap(new WeakHashMap<OnCaptchaRequested, Boolean>());
    private final Set<OnRosterUpdate> mOnRosterUpdates = Collections.newSetFromMap(new WeakHashMap<OnRosterUpdate, Boolean>());
    private final Set<OnUpdateBlocklist> mOnUpdateBlocklist = Collections.newSetFromMap(new WeakHashMap<OnUpdateBlocklist, Boolean>());
    private final Set<OnMucRosterUpdate> mOnMucRosterUpdate = Collections.newSetFromMap(new WeakHashMap<OnMucRosterUpdate, Boolean>());
    private final Set<OnKeyStatusUpdated> mOnKeyStatusUpdated = Collections.newSetFromMap(new WeakHashMap<OnKeyStatusUpdated, Boolean>());

    private final Object LISTENER_LOCK = new Object();


    private final OnBindListener mOnBindListener = new OnBindListener() {

        @Override
        public void onBind(final Account account) {
            synchronized (mInProgressAvatarFetches) {
                for (Iterator<String> iterator = mInProgressAvatarFetches.iterator(); iterator.hasNext(); ) {
                    final String KEY = iterator.next();
                    if (KEY.startsWith(account.getJid().asBareJid() + "_")) {
                        iterator.remove();
                    }
                }
            }
            boolean loggedInSuccessfully = account.setOption(Account.OPTION_LOGGED_IN_SUCCESSFULLY, true);
            boolean gainedFeature = account.setOption(Account.OPTION_HTTP_UPLOAD_AVAILABLE, account.getXmppConnection().getFeatures().httpUpload(0));
            if (loggedInSuccessfully || gainedFeature) {
                databaseBackend.updateAccount(account);
            }

            if (loggedInSuccessfully) {
                if (!TextUtils.isEmpty(account.getDisplayName())) {
                    Log.d(Config.LOGTAG,account.getJid().asBareJid()+": display name wasn't empty on first log in. publishing");
                    publishDisplayName(account);
                }
            }

            account.getRoster().clearPresences();
            mJingleConnectionManager.cancelInTransmission();
            mQuickConversationsService.considerSyncBackground(false);
            fetchRosterFromServer(account);
            if (!account.getXmppConnection().getFeatures().bookmarksConversion()) {
                fetchBookmarks(account);
            }
            final boolean flexible = account.getXmppConnection().getFeatures().flexibleOfflineMessageRetrieval();
            final boolean catchup = getMessageArchiveService().inCatchup(account);
            if (flexible && catchup && account.getXmppConnection().isMamPreferenceAlways()) {
                sendIqPacket(account, mIqGenerator.purgeOfflineMessages(), (acc, packet) -> {
                    if (packet.getType() == IqPacket.TYPE.RESULT) {
                        Log.d(Config.LOGTAG, acc.getJid().asBareJid() + ": successfully purged offline messages");
                    }
                });
            }
            sendPresence(account);
            if (mPushManagementService.available(account)) {
                mPushManagementService.registerPushTokenOnServer(account);
            }
            connectMultiModeConversations(account);
            syncDirtyContacts(account);
        }
    };
    private AtomicLong mLastExpiryRun = new AtomicLong(0);
    private SecureRandom mRandom;
    private LruCache<Pair<String, String>, ServiceDiscoveryResult> discoCache = new LruCache<>(20);
    private OnStatusChanged statusListener = new OnStatusChanged() {

        @Override
        public void onStatusChanged(final Account account) {
            XmppConnection connection = account.getXmppConnection();
            updateAccountUi();

            if (account.getStatus() == Account.State.ONLINE || account.getStatus().isError()) {
                mQuickConversationsService.signalAccountStateChange();
            }

            if (account.getStatus() == Account.State.ONLINE) {
                synchronized (mLowPingTimeoutMode) {
                    if (mLowPingTimeoutMode.remove(account.getJid().asBareJid())) {
                        Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": leaving low ping timeout mode");
                    }
                }
                if (account.setShowErrorNotification(true)) {
                    databaseBackend.updateAccount(account);
                }
                mMessageArchiveService.executePendingQueries(account);
                if (connection != null && connection.getFeatures().csi()) {
                    if (checkListeners()) {
                        Log.d(Config.LOGTAG, account.getJid().asBareJid() + " sending csi//inactive");
                        connection.sendInactive();
                    } else {
                        Log.d(Config.LOGTAG, account.getJid().asBareJid() + " sending csi//active");
                        connection.sendActive();
                    }
                }
                List<Conversation> conversations = getConversations();
                for (Conversation conversation : conversations) {
                    if (conversation.getAccount() == account && !account.pendingConferenceJoins.contains(conversation)) {
                        sendUnsentMessages(conversation);
                    }
                }
                for (Conversation conversation : account.pendingConferenceLeaves) {
                    leaveMuc(conversation);
                }
                account.pendingConferenceLeaves.clear();
                for (Conversation conversation : account.pendingConferenceJoins) {
                    joinMuc(conversation);
                }
                account.pendingConferenceJoins.clear();
                scheduleWakeUpCall(Config.PING_MAX_INTERVAL, account.getUuid().hashCode());
            } else if (account.getStatus() == Account.State.OFFLINE || account.getStatus() == Account.State.DISABLED) {
                resetSendingToWaiting(account);
                if (account.isEnabled() && isInLowPingTimeoutMode(account)) {
                    Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": went into offline state during low ping mode. reconnecting now");
                    reconnectAccount(account, true, false);
                } else {
                    int timeToReconnect = mRandom.nextInt(10) + 2;
                    scheduleWakeUpCall(timeToReconnect, account.getUuid().hashCode());
                }
            } else if (account.getStatus() == Account.State.REGISTRATION_SUCCESSFUL) {
                databaseBackend.updateAccount(account);
                reconnectAccount(account, true, false);
            } else if (account.getStatus() != Account.State.CONNECTING && account.getStatus() != Account.State.NO_INTERNET) {
                resetSendingToWaiting(account);
                if (connection != null && account.getStatus().isAttemptReconnect()) {
                    final int next = connection.getTimeToNextAttempt();
                    final boolean lowPingTimeoutMode = isInLowPingTimeoutMode(account);
                    if (next <= 0) {
                        Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": error connecting account. reconnecting now. lowPingTimeout=" + Boolean.toString(lowPingTimeoutMode));
                        reconnectAccount(account, true, false);
                    } else {
                        final int attempt = connection.getAttempt() + 1;
                        Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": error connecting account. try again in " + next + "s for the " + attempt + " time. lowPingTimeout=" + Boolean.toString(lowPingTimeoutMode));
                        scheduleWakeUpCall(next, account.getUuid().hashCode());
                    }
                }
            }
            getNotificationService().updateErrorNotification();
        }
    };
    private OpenPgpServiceConnection pgpServiceConnection;
    private PgpEngine mPgpEngine = null;
    private WakeLock wakeLock;
    private PowerManager pm;
    private LruCache<String, Bitmap> mBitmapCache;
    private BroadcastReceiver mInternalEventReceiver = new InternalEventReceiver();
    private BroadcastReceiver mInternalScreenEventReceiver = new InternalEventReceiver();

    private static String generateFetchKey(Account account, final Avatar avatar) {
        return account.getJid().asBareJid() + "_" + avatar.owner + "_" + avatar.sha1sum;
    }

    private boolean isInLowPingTimeoutMode(Account account) {
        synchronized (mLowPingTimeoutMode) {
            return mLowPingTimeoutMode.contains(account.getJid().asBareJid());
        }
    }

    public void startForcingForegroundNotification() {
        mForceForegroundService.set(true);
        toggleForegroundService();
    }

    public void stopForcingForegroundNotification() {
        mForceForegroundService.set(false);
        toggleForegroundService();
    }

    public boolean areMessagesInitialized() {
        return this.restoredFromDatabaseLatch.getCount() == 0;
    }

    public PgpEngine getPgpEngine() {
        if (!Config.supportOpenPgp()) {
            return null;
        } else if (pgpServiceConnection != null && pgpServiceConnection.isBound()) {
            if (this.mPgpEngine == null) {
                this.mPgpEngine = new PgpEngine(new OpenPgpApi(
                        getApplicationContext(),
                        pgpServiceConnection.getService()), this);
            }
            return mPgpEngine;
        } else {
            return null;
        }

    }

    public OpenPgpApi getOpenPgpApi() {
        if (!Config.supportOpenPgp()) {
            return null;
        } else if (pgpServiceConnection != null && pgpServiceConnection.isBound()) {
            return new OpenPgpApi(this, pgpServiceConnection.getService());
        } else {
            return null;
        }
    }

    public FileBackend getFileBackend() {
        return this.fileBackend;
    }

    public AvatarService getAvatarService() {
        return this.mAvatarService;
    }

    public void attachLocationToConversation(final Conversation conversation, final Uri uri, final UiCallback<Message> callback) {
        int encryption = conversation.getNextEncryption();
        if (encryption == Message.ENCRYPTION_PGP) {
            encryption = Message.ENCRYPTION_DECRYPTED;
        }
        Message message = new Message(conversation, uri.toString(), encryption);
        if (conversation.getNextCounterpart() != null) {
            message.setCounterpart(conversation.getNextCounterpart());
        }
        if (encryption == Message.ENCRYPTION_DECRYPTED) {
            getPgpEngine().encrypt(message, callback);
        } else {
            sendMessage(message);
            callback.success(message);
        }
    }

    public void attachFileToConversation(final Conversation conversation, final Uri uri, final String type, final UiCallback<Message> callback) {
        final Message message;
        if (conversation.getNextEncryption() == Message.ENCRYPTION_PGP) {
            message = new Message(conversation, "", Message.ENCRYPTION_DECRYPTED);
        } else {
            message = new Message(conversation, "", conversation.getNextEncryption());
        }
        message.setCounterpart(conversation.getNextCounterpart());
        message.setType(Message.TYPE_FILE);
        final AttachFileToConversationRunnable runnable = new AttachFileToConversationRunnable(this, uri, type, message, callback);
        if (runnable.isVideoMessage()) {
            mVideoCompressionExecutor.execute(runnable);
        } else {
            mFileAddingExecutor.execute(runnable);
        }
    }

    public void attachImageToConversation(final Conversation conversation, final Uri uri, final UiCallback<Message> callback) {
        final String mimeType = MimeUtils.guessMimeTypeFromUri(this, uri);
        final String compressPictures = getCompressPicturesPreference();

        if ("never".equals(compressPictures)
                || ("auto".equals(compressPictures) && getFileBackend().useImageAsIs(uri))
                || (mimeType != null && mimeType.endsWith("/gif"))
                || getFileBackend().unusualBounds(uri)) {
            Log.d(Config.LOGTAG, conversation.getAccount().getJid().asBareJid() + ": not compressing picture. sending as file");
            attachFileToConversation(conversation, uri, mimeType, callback);
            return;
        }
        final Message message;
        if (conversation.getNextEncryption() == Message.ENCRYPTION_PGP) {
            message = new Message(conversation, "", Message.ENCRYPTION_DECRYPTED);
        } else {
            message = new Message(conversation, "", conversation.getNextEncryption());
        }
        message.setCounterpart(conversation.getNextCounterpart());
        message.setType(Message.TYPE_IMAGE);
        mFileAddingExecutor.execute(() -> {
            try {
                getFileBackend().copyImageToPrivateStorage(message, uri);
                if (conversation.getNextEncryption() == Message.ENCRYPTION_PGP) {
                    final PgpEngine pgpEngine = getPgpEngine();
                    if (pgpEngine != null) {
                        pgpEngine.encrypt(message, callback);
                    } else if (callback != null) {
                        callback.error(R.string.unable_to_connect_to_keychain, null);
                    }
                } else {
                    sendMessage(message);
                    callback.success(message);
                }
            } catch (final FileBackend.FileCopyException e) {
                callback.error(e.getResId(), message);
            }
        });
    }

    public Conversation find(Bookmark bookmark) {
        return find(bookmark.getAccount(), bookmark.getJid());
    }

    public Conversation find(final Account account, final Jid jid) {
        return find(getConversations(), account, jid);
    }

    public boolean isMuc(final Account account, final Jid jid) {
        final Conversation c = find(account, jid);
        return c != null && c.getMode() == Conversational.MODE_MULTI;
    }

    public void search(List<String> term, OnSearchResultsAvailable onSearchResultsAvailable) {
        MessageSearchTask.search(this, term, onSearchResultsAvailable);
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        final String action = intent == null ? null : intent.getAction();
        final boolean needsForegroundService = intent != null && intent.getBooleanExtra(EventReceiver.EXTRA_NEEDS_FOREGROUND_SERVICE, false);
        if (needsForegroundService) {
            Log.d(Config.LOGTAG,"toggle forced foreground service after receiving event (action="+action+")");
            toggleForegroundService(true);
        }
        String pushedAccountHash = null;
        boolean interactive = false;
        if (action != null) {
            final String uuid = intent.getStringExtra("uuid");
            switch (action) {
                case ConnectivityManager.CONNECTIVITY_ACTION:
                    if (hasInternetConnection()) {
                        if (Config.POST_CONNECTIVITY_CHANGE_PING_INTERVAL > 0) {
                            schedulePostConnectivityChange();
                        }
                        if (Config.RESET_ATTEMPT_COUNT_ON_NETWORK_CHANGE) {
                            resetAllAttemptCounts(true, false);
                        }
                    }
                    break;
                case Intent.ACTION_SHUTDOWN:
                    logoutAndSave(true);
                    return START_NOT_STICKY;
                case ACTION_CLEAR_NOTIFICATION:
                    mNotificationExecutor.execute(() -> {
                        try {
                            final Conversation c = findConversationByUuid(uuid);
                            if (c != null) {
                                mNotificationService.clear(c);
                            } else {
                                mNotificationService.clear();
                            }
                            restoredFromDatabaseLatch.await();

                        } catch (InterruptedException e) {
                            Log.d(Config.LOGTAG, "unable to process clear notification");
                        }
                    });
                    break;
                case ACTION_DISMISS_ERROR_NOTIFICATIONS:
                    dismissErrorNotifications();
                    break;
                case ACTION_TRY_AGAIN:
                    resetAllAttemptCounts(false, true);
                    interactive = true;
                    break;
                case ACTION_REPLY_TO_CONVERSATION:
                    Bundle remoteInput = RemoteInput.getResultsFromIntent(intent);
                    if (remoteInput == null) {
                        break;
                    }
                    final CharSequence body = remoteInput.getCharSequence("text_reply");
                    final boolean dismissNotification = intent.getBooleanExtra("dismiss_notification", false);
                    if (body == null || body.length() <= 0) {
                        break;
                    }
                    mNotificationExecutor.execute(() -> {
                        try {
                            restoredFromDatabaseLatch.await();
                            final Conversation c = findConversationByUuid(uuid);
                            if (c != null) {
                                directReply(c, body.toString(), dismissNotification);
                            }
                        } catch (InterruptedException e) {
                            Log.d(Config.LOGTAG, "unable to process direct reply");
                        }
                    });
                    break;
                case ACTION_MARK_AS_READ:
                    mNotificationExecutor.execute(() -> {
                        final Conversation c = findConversationByUuid(uuid);
                        if (c == null) {
                            Log.d(Config.LOGTAG, "received mark read intent for unknown conversation (" + uuid + ")");
                            return;
                        }
                        try {
                            restoredFromDatabaseLatch.await();
                            sendReadMarker(c, null);
                        } catch (InterruptedException e) {
                            Log.d(Config.LOGTAG, "unable to process notification read marker for conversation " + c.getName());
                        }

                    });
                    break;
                case ACTION_SNOOZE:
                    mNotificationExecutor.execute(() -> {
                        final Conversation c = findConversationByUuid(uuid);
                        if (c == null) {
                            Log.d(Config.LOGTAG, "received snooze intent for unknown conversation (" + uuid + ")");
                            return;
                        }
                        c.setMutedTill(System.currentTimeMillis() + 30 * 60 * 1000);
                        mNotificationService.clear(c);
                        updateConversation(c);
                    });
                case AudioManager.RINGER_MODE_CHANGED_ACTION:
                case NotificationManager.ACTION_INTERRUPTION_FILTER_CHANGED:
                    if (dndOnSilentMode()) {
                        refreshAllPresences();
                    }
                    break;
                case Intent.ACTION_SCREEN_ON:
                    deactivateGracePeriod();
                case Intent.ACTION_SCREEN_OFF:
                    if (awayWhenScreenOff()) {
                        refreshAllPresences();
                    }
                    break;
                case ACTION_FCM_TOKEN_REFRESH:
                    refreshAllFcmTokens();
                    break;
                case ACTION_IDLE_PING:
                    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
                        scheduleNextIdlePing();
                    }
                    break;
                case ACTION_FCM_MESSAGE_RECEIVED:
                    pushedAccountHash = intent.getStringExtra("account");
                    Log.d(Config.LOGTAG, "push message arrived in service. account=" + pushedAccountHash);
                    break;
                case Intent.ACTION_SEND:
                    Uri uri = intent.getData();
                    if (uri != null) {
                        Log.d(Config.LOGTAG, "received uri permission for " + uri.toString());
                    }
                    return START_STICKY;
            }
        }
        synchronized (this) {
            WakeLockHelper.acquire(wakeLock);
            boolean pingNow = ConnectivityManager.CONNECTIVITY_ACTION.equals(action) || (Config.POST_CONNECTIVITY_CHANGE_PING_INTERVAL > 0 && ACTION_POST_CONNECTIVITY_CHANGE.equals(action));
            HashSet<Account> pingCandidates = new HashSet<>();
            for (Account account : accounts) {
                pingNow |= processAccountState(account,
                        interactive,
                        "ui".equals(action),
                        CryptoHelper.getAccountFingerprint(account, PhoneHelper.getAndroidId(this)).equals(pushedAccountHash),
                        pingCandidates);
            }
            if (pingNow) {
                for (Account account : pingCandidates) {
                    final boolean lowTimeout = isInLowPingTimeoutMode(account);
                    account.getXmppConnection().sendPing();
                    Log.d(Config.LOGTAG, account.getJid().asBareJid() + " send ping (action=" + action + ",lowTimeout=" + Boolean.toString(lowTimeout) + ")");
                    scheduleWakeUpCall(lowTimeout ? Config.LOW_PING_TIMEOUT : Config.PING_TIMEOUT, account.getUuid().hashCode());
                }
            }
            WakeLockHelper.release(wakeLock);
        }
        if (SystemClock.elapsedRealtime() - mLastExpiryRun.get() >= Config.EXPIRY_INTERVAL) {
            expireOldMessages();
        }
        return START_STICKY;
    }

    private boolean processAccountState(Account account, boolean interactive, boolean isUiAction, boolean isAccountPushed, HashSet<Account> pingCandidates) {
        boolean pingNow = false;
        if (account.getStatus().isAttemptReconnect()) {
            if (!hasInternetConnection()) {
                account.setStatus(Account.State.NO_INTERNET);
                if (statusListener != null) {
                    statusListener.onStatusChanged(account);
                }
            } else {
                if (account.getStatus() == Account.State.NO_INTERNET) {
                    account.setStatus(Account.State.OFFLINE);
                    if (statusListener != null) {
                        statusListener.onStatusChanged(account);
                    }
                }
                if (account.getStatus() == Account.State.ONLINE) {
                    synchronized (mLowPingTimeoutMode) {
                        long lastReceived = account.getXmppConnection().getLastPacketReceived();
                        long lastSent = account.getXmppConnection().getLastPingSent();
                        long pingInterval = isUiAction ? Config.PING_MIN_INTERVAL * 1000 : Config.PING_MAX_INTERVAL * 1000;
                        long msToNextPing = (Math.max(lastReceived, lastSent) + pingInterval) - SystemClock.elapsedRealtime();
                        int pingTimeout = mLowPingTimeoutMode.contains(account.getJid().asBareJid()) ? Config.LOW_PING_TIMEOUT * 1000 : Config.PING_TIMEOUT * 1000;
                        long pingTimeoutIn = (lastSent + pingTimeout) - SystemClock.elapsedRealtime();
                        if (lastSent > lastReceived) {
                            if (pingTimeoutIn < 0) {
                                Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": ping timeout");
                                this.reconnectAccount(account, true, interactive);
                            } else {
                                int secs = (int) (pingTimeoutIn / 1000);
                                this.scheduleWakeUpCall(secs, account.getUuid().hashCode());
                            }
                        } else {
                            pingCandidates.add(account);
                            if (isAccountPushed) {
                                pingNow = true;
                                if (mLowPingTimeoutMode.add(account.getJid().asBareJid())) {
                                    Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": entering low ping timeout mode");
                                }
                            } else if (msToNextPing <= 0) {
                                pingNow = true;
                            } else {
                                this.scheduleWakeUpCall((int) (msToNextPing / 1000), account.getUuid().hashCode());
                                if (mLowPingTimeoutMode.remove(account.getJid().asBareJid())) {
                                    Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": leaving low ping timeout mode");
                                }
                            }
                        }
                    }
                } else if (account.getStatus() == Account.State.OFFLINE) {
                    reconnectAccount(account, true, interactive);
                } else if (account.getStatus() == Account.State.CONNECTING) {
                    long secondsSinceLastConnect = (SystemClock.elapsedRealtime() - account.getXmppConnection().getLastConnect()) / 1000;
                    long secondsSinceLastDisco = (SystemClock.elapsedRealtime() - account.getXmppConnection().getLastDiscoStarted()) / 1000;
                    long discoTimeout = Config.CONNECT_DISCO_TIMEOUT - secondsSinceLastDisco;
                    long timeout = Config.CONNECT_TIMEOUT - secondsSinceLastConnect;
                    if (timeout < 0) {
                        Log.d(Config.LOGTAG, account.getJid() + ": time out during connect reconnecting (secondsSinceLast=" + secondsSinceLastConnect + ")");
                        account.getXmppConnection().resetAttemptCount(false);
                        reconnectAccount(account, true, interactive);
                    } else if (discoTimeout < 0) {
                        account.getXmppConnection().sendDiscoTimeout();
                        scheduleWakeUpCall((int) Math.min(timeout, discoTimeout), account.getUuid().hashCode());
                    } else {
                        scheduleWakeUpCall((int) Math.min(timeout, discoTimeout), account.getUuid().hashCode());
                    }
                } else {
                    if (account.getXmppConnection().getTimeToNextAttempt() <= 0) {
                        reconnectAccount(account, true, interactive);
                    }
                }
            }
        }
        return pingNow;
    }

    public boolean isDataSaverDisabled() {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
            ConnectivityManager connectivityManager = (ConnectivityManager) getSystemService(CONNECTIVITY_SERVICE);
            return !connectivityManager.isActiveNetworkMetered()
                    || connectivityManager.getRestrictBackgroundStatus() == ConnectivityManager.RESTRICT_BACKGROUND_STATUS_DISABLED;
        } else {
            return true;
        }
    }

    private void directReply(Conversation conversation, String body, final boolean dismissAfterReply) {
        Message message = new Message(conversation, body, conversation.getNextEncryption());
        message.markUnread();
        if (message.getEncryption() == Message.ENCRYPTION_PGP) {
            getPgpEngine().encrypt(message, new UiCallback<Message>() {
                @Override
                public void success(Message message) {
                    if (dismissAfterReply) {
                        markRead((Conversation) message.getConversation(), true);
                    } else {
                        mNotificationService.pushFromDirectReply(message);
                    }
                }

                @Override
                public void error(int errorCode, Message object) {

                }

                @Override
                public void userInputRequried(PendingIntent pi, Message object) {

                }
            });
        } else {
            sendMessage(message);
            if (dismissAfterReply) {
                markRead(conversation, true);
            } else {
                mNotificationService.pushFromDirectReply(message);
            }
        }
    }

    private boolean dndOnSilentMode() {
        return getBooleanPreference(SettingsActivity.DND_ON_SILENT_MODE, R.bool.dnd_on_silent_mode);
    }

    private boolean manuallyChangePresence() {
        return getBooleanPreference(SettingsActivity.MANUALLY_CHANGE_PRESENCE, R.bool.manually_change_presence);
    }

    private boolean treatVibrateAsSilent() {
        return getBooleanPreference(SettingsActivity.TREAT_VIBRATE_AS_SILENT, R.bool.treat_vibrate_as_silent);
    }

    private boolean awayWhenScreenOff() {
        return getBooleanPreference(SettingsActivity.AWAY_WHEN_SCREEN_IS_OFF, R.bool.away_when_screen_off);
    }

    private String getCompressPicturesPreference() {
        return getPreferences().getString("picture_compression", getResources().getString(R.string.picture_compression));
    }

    private Presence.Status getTargetPresence() {
        if (dndOnSilentMode() && isPhoneSilenced()) {
            return Presence.Status.DND;
        } else if (awayWhenScreenOff() && !isInteractive()) {
            return Presence.Status.AWAY;
        } else {
            return Presence.Status.ONLINE;
        }
    }

    @SuppressLint("NewApi")
    @SuppressWarnings("deprecation")
    public boolean isInteractive() {
        try {
            final PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);

            final boolean isScreenOn;
            if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {
                isScreenOn = pm.isScreenOn();
            } else {
                isScreenOn = pm.isInteractive();
            }
            return isScreenOn;
        } catch (RuntimeException e) {
            return false;
        }
    }

    private boolean isPhoneSilenced() {
        final boolean notificationDnd;
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            final NotificationManager notificationManager = getSystemService(NotificationManager.class);
            final int filter = notificationManager == null ? NotificationManager.INTERRUPTION_FILTER_UNKNOWN : notificationManager.getCurrentInterruptionFilter();
            notificationDnd = filter >= NotificationManager.INTERRUPTION_FILTER_PRIORITY;
        } else {
            notificationDnd = false;
        }
        final AudioManager audioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
        final int ringerMode = audioManager == null ? AudioManager.RINGER_MODE_NORMAL : audioManager.getRingerMode();
        try {
            if (treatVibrateAsSilent()) {
                return notificationDnd || ringerMode != AudioManager.RINGER_MODE_NORMAL;
            } else {
                return notificationDnd || ringerMode == AudioManager.RINGER_MODE_SILENT;
            }
        } catch (Throwable throwable) {
            Log.d(Config.LOGTAG, "platform bug in isPhoneSilenced (" + throwable.getMessage() + ")");
            return notificationDnd;
        }
    }

    private void resetAllAttemptCounts(boolean reallyAll, boolean retryImmediately) {
        Log.d(Config.LOGTAG, "resetting all attempt counts");
        for (Account account : accounts) {
            if (account.hasErrorStatus() || reallyAll) {
                final XmppConnection connection = account.getXmppConnection();
                if (connection != null) {
                    connection.resetAttemptCount(retryImmediately);
                }
            }
            if (account.setShowErrorNotification(true)) {
                databaseBackend.updateAccount(account);
            }
        }
        mNotificationService.updateErrorNotification();
    }

    private void dismissErrorNotifications() {
        for (final Account account : this.accounts) {
            if (account.hasErrorStatus()) {
                Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": dismissing error notification");
                if (account.setShowErrorNotification(false)) {
                    databaseBackend.updateAccount(account);
                }
            }
        }
    }

    private void expireOldMessages() {
        expireOldMessages(false);
    }

    public void expireOldMessages(final boolean resetHasMessagesLeftOnServer) {
        mLastExpiryRun.set(SystemClock.elapsedRealtime());
        mDatabaseWriterExecutor.execute(() -> {
            long timestamp = getAutomaticMessageDeletionDate();
            if (timestamp > 0) {
                databaseBackend.expireOldMessages(timestamp);
                synchronized (XmppConnectionService.this.conversations) {
                    for (Conversation conversation : XmppConnectionService.this.conversations) {
                        conversation.expireOldMessages(timestamp);
                        if (resetHasMessagesLeftOnServer) {
                            conversation.messagesLoaded.set(true);
                            conversation.setHasMessagesLeftOnServer(true);
                        }
                    }
                }
                updateConversationUi();
            }
        });
    }

    public boolean hasInternetConnection() {
        final ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
        try {
            final NetworkInfo activeNetwork = cm == null ? null : cm.getActiveNetworkInfo();
            return activeNetwork != null && (activeNetwork.isConnected() || activeNetwork.getType() == ConnectivityManager.TYPE_ETHERNET);
        } catch (RuntimeException e) {
            Log.d(Config.LOGTAG, "unable to check for internet connection", e);
            return true; //if internet connection can not be checked it is probably best to just try
        }
    }

    @SuppressLint("TrulyRandom")
    @Override
    public void onCreate() {
        if (Compatibility.runsTwentySix()) {
            mNotificationService.initializeChannels();
        }
        mForceDuringOnCreate.set(Compatibility.runsAndTargetsTwentySix(this));
        toggleForegroundService();
        this.destroyed = false;
        OmemoSetting.load(this);
        ExceptionHelper.init(getApplicationContext());
        try {
            Security.insertProviderAt(Conscrypt.newProvider(), 1);
        } catch (Throwable throwable) {
            Log.e(Config.LOGTAG,"unable to initialize security provider", throwable);
        }
        Resolver.init(this);
        this.mRandom = new SecureRandom();
        updateMemorizingTrustmanager();
        final int maxMemory = (int) (Runtime.getRuntime().maxMemory() / 1024);
        final int cacheSize = maxMemory / 8;
        this.mBitmapCache = new LruCache<String, Bitmap>(cacheSize) {
            @Override
            protected int sizeOf(final String key, final Bitmap bitmap) {
                return bitmap.getByteCount() / 1024;
            }
        };
        if (mLastActivity == 0) {
            mLastActivity = getPreferences().getLong(SETTING_LAST_ACTIVITY_TS, System.currentTimeMillis());
        }

        Log.d(Config.LOGTAG, "initializing database...");
        this.databaseBackend = DatabaseBackend.getInstance(getApplicationContext());
        Log.d(Config.LOGTAG, "restoring accounts...");
        this.accounts = databaseBackend.getAccounts();
        final SharedPreferences.Editor editor = getPreferences().edit();
        if (this.accounts.size() == 0 && Arrays.asList("Sony", "Sony Ericsson").contains(Build.MANUFACTURER)) {
            editor.putBoolean(SettingsActivity.KEEP_FOREGROUND_SERVICE, true);
            Log.d(Config.LOGTAG, Build.MANUFACTURER + " is on blacklist. enabling foreground service");
        }
        final boolean hasEnabledAccounts = hasEnabledAccounts();
        editor.putBoolean(EventReceiver.SETTING_ENABLED_ACCOUNTS, hasEnabledAccounts).apply();
        editor.apply();
        toggleSetProfilePictureActivity(hasEnabledAccounts);

        restoreFromDatabase();

        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M || ContextCompat.checkSelfPermission(this, Manifest.permission.READ_CONTACTS) == PackageManager.PERMISSION_GRANTED) {
            startContactObserver();
        }
        if (Compatibility.hasStoragePermission(this)) {
            Log.d(Config.LOGTAG, "starting file observer");
            mFileAddingExecutor.execute(this.fileObserver::startWatching);
            mFileAddingExecutor.execute(this::checkForDeletedFiles);
        }
        if (Config.supportOpenPgp()) {
            this.pgpServiceConnection = new OpenPgpServiceConnection(this, "org.sufficientlysecure.keychain", new OpenPgpServiceConnection.OnBound() {
                @Override
                public void onBound(IOpenPgpService2 service) {
                    for (Account account : accounts) {
                        final PgpDecryptionService pgp = account.getPgpDecryptionService();
                        if (pgp != null) {
                            pgp.continueDecryption(true);
                        }
                    }
                }

                @Override
                public void onError(Exception e) {
                }
            });
            this.pgpServiceConnection.bindToService();
        }

        this.pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
        this.wakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "Conversations:Service");

        toggleForegroundService();
        updateUnreadCountBadge();
        toggleScreenEventReceiver();
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            scheduleNextIdlePing();
            IntentFilter intentFilter = new IntentFilter();
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
                intentFilter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);
            }
            intentFilter.addAction(NotificationManager.ACTION_INTERRUPTION_FILTER_CHANGED);
            registerReceiver(this.mInternalEventReceiver, intentFilter);
        }
        mForceDuringOnCreate.set(false);
        toggleForegroundService();
    }

    private void checkForDeletedFiles() {
        if (destroyed) {
            Log.d(Config.LOGTAG, "Do not check for deleted files because service has been destroyed");
            return;
        }
        final long start = SystemClock.elapsedRealtime();
        final List<DatabaseBackend.FilePathInfo> relativeFilePaths = databaseBackend.getFilePathInfo();
        final List<DatabaseBackend.FilePathInfo> changed = new ArrayList<>();
        for(final DatabaseBackend.FilePathInfo filePath : relativeFilePaths) {
            if (destroyed) {
                Log.d(Config.LOGTAG, "Stop checking for deleted files because service has been destroyed");
                return;
            }
            final File file = fileBackend.getFileForPath(filePath.path);
            if (filePath.setDeleted(!file.exists())) {
                changed.add(filePath);
            }
        }
        final long duration = SystemClock.elapsedRealtime() - start;
        Log.d(Config.LOGTAG,"found "+changed.size()+" changed files on start up. total="+relativeFilePaths.size()+". ("+duration+"ms)");
        if (changed.size() > 0) {
            databaseBackend.markFilesAsChanged(changed);
            markChangedFiles(changed);
        }
    }

    public void startContactObserver() {
        getContentResolver().registerContentObserver(ContactsContract.Contacts.CONTENT_URI, true, new ContentObserver(null) {
            @Override
            public void onChange(boolean selfChange) {
                super.onChange(selfChange);
                if (restoredFromDatabaseLatch.getCount() == 0) {
                    loadPhoneContacts();
                }
            }
        });
    }

    @Override
    public void onTrimMemory(int level) {
        super.onTrimMemory(level);
        if (level >= TRIM_MEMORY_COMPLETE) {
            Log.d(Config.LOGTAG, "clear cache due to low memory");
            getBitmapCache().evictAll();
        }
    }

    @Override
    public void onDestroy() {
        try {
            unregisterReceiver(this.mInternalEventReceiver);
        } catch (IllegalArgumentException e) {
            //ignored
        }
        destroyed = false;
        fileObserver.stopWatching();
        super.onDestroy();
    }

    public void restartFileObserver() {
        Log.d(Config.LOGTAG, "restarting file observer");
        mFileAddingExecutor.execute(this.fileObserver::restartWatching);
        mFileAddingExecutor.execute(this::checkForDeletedFiles);
    }

    public void toggleScreenEventReceiver() {
        if (awayWhenScreenOff() && !manuallyChangePresence()) {
            final IntentFilter filter = new IntentFilter();
            filter.addAction(Intent.ACTION_SCREEN_ON);
            filter.addAction(Intent.ACTION_SCREEN_OFF);
            registerReceiver(this.mInternalScreenEventReceiver, filter);
        } else {
            try {
                unregisterReceiver(this.mInternalScreenEventReceiver);
            } catch (IllegalArgumentException e) {
                //ignored
            }
        }
    }

    public void toggleForegroundService() {
        toggleForegroundService(false);
    }

    private void toggleForegroundService(boolean force) {
        final boolean status;
        if (force || mForceDuringOnCreate.get() || mForceForegroundService.get() || (Compatibility.keepForegroundService(this) && hasEnabledAccounts())) {
            startForeground(NotificationService.FOREGROUND_NOTIFICATION_ID, this.mNotificationService.createForegroundNotification());
            status = true;
        } else {
            stopForeground(true);
            status = false;
        }
        mNotificationService.dismissForcedForegroundNotification(); //if the channel was changed the previous call might fail
        Log.d(Config.LOGTAG,"ForegroundService: "+(status?"on":"off"));
    }

    public boolean foregroundNotificationNeedsUpdatingWhenErrorStateChanges() {
        return !mForceForegroundService.get() && Compatibility.keepForegroundService(this) && hasEnabledAccounts();
    }

    @Override
    public void onTaskRemoved(final Intent rootIntent) {
        super.onTaskRemoved(rootIntent);
        if ((Compatibility.keepForegroundService(this) && hasEnabledAccounts()) || mForceForegroundService.get()) {
            Log.d(Config.LOGTAG, "ignoring onTaskRemoved because foreground service is activated");
        } else {
            this.logoutAndSave(false);
        }
    }

    private void logoutAndSave(boolean stop) {
        int activeAccounts = 0;
        for (final Account account : accounts) {
            if (account.getStatus() != Account.State.DISABLED) {
                databaseBackend.writeRoster(account.getRoster());
                activeAccounts++;
            }
            if (account.getXmppConnection() != null) {
                new Thread(() -> disconnect(account, false)).start();
            }
        }
        if (stop || activeAccounts == 0) {
            Log.d(Config.LOGTAG, "good bye");
            stopSelf();
        }
    }

    private void schedulePostConnectivityChange() {
        final AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
        if (alarmManager == null) {
            return;
        }
        final long triggerAtMillis = SystemClock.elapsedRealtime() + (Config.POST_CONNECTIVITY_CHANGE_PING_INTERVAL * 1000);
        final Intent intent = new Intent(this, EventReceiver.class);
        intent.setAction(ACTION_POST_CONNECTIVITY_CHANGE);
        try {
            final PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 1, intent, 0);
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
                alarmManager.setAndAllowWhileIdle(AlarmManager.ELAPSED_REALTIME_WAKEUP, triggerAtMillis, pendingIntent);
            } else {
                alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP, triggerAtMillis, pendingIntent);
            }
        } catch (RuntimeException e) {
            Log.e(Config.LOGTAG, "unable to schedule alarm for post connectivity change", e);
        }
    }

    public void scheduleWakeUpCall(int seconds, int requestCode) {
        final long timeToWake = SystemClock.elapsedRealtime() + (seconds < 0 ? 1 : seconds + 1) * 1000;
        final AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
        if (alarmManager == null) {
            return;
        }
        final Intent intent = new Intent(this, EventReceiver.class);
        intent.setAction("ping");
        try {
            PendingIntent pendingIntent = PendingIntent.getBroadcast(this, requestCode, intent, 0);
            alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP, timeToWake, pendingIntent);
        } catch (RuntimeException e) {
            Log.e(Config.LOGTAG, "unable to schedule alarm for ping", e);
        }
    }

    @TargetApi(Build.VERSION_CODES.M)
    private void scheduleNextIdlePing() {
        final long timeToWake = SystemClock.elapsedRealtime() + (Config.IDLE_PING_INTERVAL * 1000);
        final AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
        if (alarmManager == null) {
            return;
        }
        final Intent intent = new Intent(this, EventReceiver.class);
        intent.setAction(ACTION_IDLE_PING);
        try {
            PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, intent, 0);
            alarmManager.setAndAllowWhileIdle(AlarmManager.ELAPSED_REALTIME_WAKEUP, timeToWake, pendingIntent);
        } catch (RuntimeException e) {
            Log.d(Config.LOGTAG, "unable to schedule alarm for idle ping", e);
        }
    }

    public XmppConnection createConnection(final Account account) {
        final XmppConnection connection = new XmppConnection(account, this);
        connection.setOnMessagePacketReceivedListener(this.mMessageParser);
        connection.setOnStatusChangedListener(this.statusListener);
        connection.setOnPresencePacketReceivedListener(this.mPresenceParser);
        connection.setOnUnregisteredIqPacketReceivedListener(this.mIqParser);
        connection.setOnJinglePacketReceivedListener(this.jingleListener);
        connection.setOnBindListener(this.mOnBindListener);
        connection.setOnMessageAcknowledgeListener(this.mOnMessageAcknowledgedListener);
        connection.addOnAdvancedStreamFeaturesAvailableListener(this.mMessageArchiveService);
        connection.addOnAdvancedStreamFeaturesAvailableListener(this.mAvatarService);
        AxolotlService axolotlService = account.getAxolotlService();
        if (axolotlService != null) {
            connection.addOnAdvancedStreamFeaturesAvailableListener(axolotlService);
        }
        return connection;
    }

    public void sendChatState(Conversation conversation) {
        if (sendChatStates()) {
            MessagePacket packet = mMessageGenerator.generateChatState(conversation);
            sendMessagePacket(conversation.getAccount(), packet);
        }
    }

    private void sendFileMessage(final Message message, final boolean delay) {
        Log.d(Config.LOGTAG, "send file message");
        final Account account = message.getConversation().getAccount();
        if (account.httpUploadAvailable(fileBackend.getFile(message, false).getSize())
                || message.getConversation().getMode() == Conversation.MODE_MULTI) {
            mHttpConnectionManager.createNewUploadConnection(message, delay);
        } else {
            mJingleConnectionManager.createNewConnection(message);
        }
    }

    public void sendMessage(final Message message) {
        sendMessage(message, false, false);
    }

    private void sendMessage(final Message message, final boolean resend, final boolean delay) {
        final Account account = message.getConversation().getAccount();
        if (account.setShowErrorNotification(true)) {
            databaseBackend.updateAccount(account);
            mNotificationService.updateErrorNotification();
        }
        final Conversation conversation = (Conversation) message.getConversation();
        account.deactivateGracePeriod();


        if (QuickConversationsService.isQuicksy() && conversation.getMode() == Conversation.MODE_SINGLE) {
            final Contact contact = conversation.getContact();
            if (!contact.showInRoster() && contact.getOption(Contact.Options.SYNCED_VIA_OTHER)) {
                Log.d(Config.LOGTAG,account.getJid().asBareJid()+": adding "+contact.getJid()+" on sending message");
                createContact(contact, true);
            }
        }

        MessagePacket packet = null;
        final boolean addToConversation = (conversation.getMode() != Conversation.MODE_MULTI
                || !Patches.BAD_MUC_REFLECTION.contains(account.getServerIdentity()))
                && !message.edited();
        boolean saveInDb = addToConversation;
        message.setStatus(Message.STATUS_WAITING);

        if (account.isOnlineAndConnected()) {
            switch (message.getEncryption()) {
                case Message.ENCRYPTION_NONE:
                    if (message.needsUploading()) {
                        if (account.httpUploadAvailable(fileBackend.getFile(message, false).getSize())
                                || conversation.getMode() == Conversation.MODE_MULTI
                                || message.fixCounterpart()) {
                            this.sendFileMessage(message, delay);
                        } else {
                            break;
                        }
                    } else {
                        packet = mMessageGenerator.generateChat(message);
                    }
                    break;
                case Message.ENCRYPTION_PGP:
                case Message.ENCRYPTION_DECRYPTED:
                    if (message.needsUploading()) {
                        if (account.httpUploadAvailable(fileBackend.getFile(message, false).getSize())
                                || conversation.getMode() == Conversation.MODE_MULTI
                                || message.fixCounterpart()) {
                            this.sendFileMessage(message, delay);
                        } else {
                            break;
                        }
                    } else {
                        packet = mMessageGenerator.generatePgpChat(message);
                    }
                    break;
                case Message.ENCRYPTION_AXOLOTL:
                    message.setFingerprint(account.getAxolotlService().getOwnFingerprint());
                    if (message.needsUploading()) {
                        if (account.httpUploadAvailable(fileBackend.getFile(message, false).getSize())
                                || conversation.getMode() == Conversation.MODE_MULTI
                                || message.fixCounterpart()) {
                            this.sendFileMessage(message, delay);
                        } else {
                            break;
                        }
                    } else {
                        XmppAxolotlMessage axolotlMessage = account.getAxolotlService().fetchAxolotlMessageFromCache(message);
                        if (axolotlMessage == null) {
                            account.getAxolotlService().preparePayloadMessage(message, delay);
                        } else {
                            packet = mMessageGenerator.generateAxolotlChat(message, axolotlMessage);
                        }
                    }
                    break;

            }
            if (packet != null) {
                if (account.getXmppConnection().getFeatures().sm()
                        || (conversation.getMode() == Conversation.MODE_MULTI && message.getCounterpart().isBareJid())) {
                    message.setStatus(Message.STATUS_UNSEND);
                } else {
                    message.setStatus(Message.STATUS_SEND);
                }
            }
        } else {
            switch (message.getEncryption()) {
                case Message.ENCRYPTION_DECRYPTED:
                    if (!message.needsUploading()) {
                        String pgpBody = message.getEncryptedBody();
                        String decryptedBody = message.getBody();
                        message.setBody(pgpBody); //TODO might throw NPE
                        message.setEncryption(Message.ENCRYPTION_PGP);
                        if (message.edited()) {
                            message.setBody(decryptedBody);
                            message.setEncryption(Message.ENCRYPTION_DECRYPTED);
                            if (!databaseBackend.updateMessage(message, message.getEditedId())) {
                                Log.e(Config.LOGTAG,"error updated message in DB after edit");
                            }
                            updateConversationUi();
                            return;
                        } else {
                            databaseBackend.createMessage(message);
                            saveInDb = false;
                            message.setBody(decryptedBody);
                            message.setEncryption(Message.ENCRYPTION_DECRYPTED);
                        }
                    }
                    break;
                case Message.ENCRYPTION_AXOLOTL:
                    message.setFingerprint(account.getAxolotlService().getOwnFingerprint());
                    break;
            }
        }


        boolean mucMessage = conversation.getMode() == Conversation.MODE_MULTI && message.getType() != Message.TYPE_PRIVATE;
        if (mucMessage) {
            message.setCounterpart(conversation.getMucOptions().getSelf().getFullJid());
        }

        if (resend) {
            if (packet != null && addToConversation) {
                if (account.getXmppConnection().getFeatures().sm() || mucMessage) {
                    markMessage(message, Message.STATUS_UNSEND);
                } else {
                    markMessage(message, Message.STATUS_SEND);
                }
            }
        } else {
            if (addToConversation) {
                conversation.add(message);
            }
            if (saveInDb) {
                databaseBackend.createMessage(message);
            } else if (message.edited()) {
                if (!databaseBackend.updateMessage(message, message.getEditedId())) {
                    Log.e(Config.LOGTAG,"error updated message in DB after edit");
                }
            }
            updateConversationUi();
        }
        if (packet != null) {
            if (delay) {
                mMessageGenerator.addDelay(packet, message.getTimeSent());
            }
            if (conversation.setOutgoingChatState(Config.DEFAULT_CHATSTATE)) {
                if (this.sendChatStates()) {
                    packet.addChild(ChatState.toElement(conversation.getOutgoingChatState()));
                }
            }
            sendMessagePacket(account, packet);
        }
    }

    private void sendUnsentMessages(final Conversation conversation) {
        conversation.findWaitingMessages(message -> resendMessage(message, true));
    }

    public void resendMessage(final Message message, final boolean delay) {
        sendMessage(message, true, delay);
    }

    public void fetchRosterFromServer(final Account account) {
        final IqPacket iqPacket = new IqPacket(IqPacket.TYPE.GET);
        if (!"".equals(account.getRosterVersion())) {
            Log.d(Config.LOGTAG, account.getJid().asBareJid()
                    + ": fetching roster version " + account.getRosterVersion());
        } else {
            Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": fetching roster");
        }
        iqPacket.query(Namespace.ROSTER).setAttribute("ver", account.getRosterVersion());
        sendIqPacket(account, iqPacket, mIqParser);
    }

    public void fetchBookmarks(final Account account) {
        final IqPacket iqPacket = new IqPacket(IqPacket.TYPE.GET);
        final Element query = iqPacket.query("jabber:iq:private");
        query.addChild("storage", Namespace.BOOKMARKS);
        final OnIqPacketReceived callback = (a, response) -> {
            if (response.getType() == IqPacket.TYPE.RESULT) {
                final Element query1 = response.query();
                final Element storage = query1.findChild("storage", "storage:bookmarks");
                processBookmarks(a, storage, false);
            } else {
                Log.d(Config.LOGTAG, a.getJid().asBareJid() + ": could not fetch bookmarks");
            }
        };
        sendIqPacket(account, iqPacket, callback);
    }

    public void processBookmarks(Account account, Element storage, final boolean pep) {
        final Set<Jid> previousBookmarks = account.getBookmarkedJids();
        final HashMap<Jid, Bookmark> bookmarks = new HashMap<>();
        final boolean synchronizeWithBookmarks = synchronizeWithBookmarks();
        if (storage != null) {
            for (final Element item : storage.getChildren()) {
                if (item.getName().equals("conference")) {
                    final Bookmark bookmark = Bookmark.parse(item, account);
                    Bookmark old = bookmarks.put(bookmark.getJid(), bookmark);
                    if (old != null && old.getBookmarkName() != null && bookmark.getBookmarkName() == null) {
                        bookmark.setBookmarkName(old.getBookmarkName());
                    }
                    if (bookmark.getJid() == null) {
                        continue;
                    }
                    previousBookmarks.remove(bookmark.getJid().asBareJid());
                    Conversation conversation = find(bookmark);
                    if (conversation != null) {
                        if (conversation.getMode() != Conversation.MODE_MULTI) {
                            continue;
                        }
                        bookmark.setConversation(conversation);
                        if (pep && synchronizeWithBookmarks && !bookmark.autojoin()) {
                            Log.d(Config.LOGTAG,account.getJid().asBareJid()+": archiving conference ("+conversation.getJid()+") after receiving pep");
                            archiveConversation(conversation, false);
                        }
                    } else if (synchronizeWithBookmarks && bookmark.autojoin()) {
                        conversation = findOrCreateConversation(account, bookmark.getFullJid(), true, true, false);
                        bookmark.setConversation(conversation);
                    }
                }
            }
            if (pep && synchronizeWithBookmarks) {
                Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": " + previousBookmarks.size() + " bookmarks have been removed");
                for (Jid jid : previousBookmarks) {
                    final Conversation conversation = find(account, jid);
                    if (conversation != null && conversation.getMucOptions().getError() == MucOptions.Error.DESTROYED) {
                        Log.d(Config.LOGTAG,account.getJid().asBareJid()+": archiving destroyed conference ("+conversation.getJid()+") after receiving pep");
                        archiveConversation(conversation, false);
                    }
                }
            }
        }
        account.setBookmarks(new CopyOnWriteArrayList<>(bookmarks.values()));
    }

    public void pushBookmarks(Account account) {
        if (account.getXmppConnection().getFeatures().bookmarksConversion()) {
            pushBookmarksPep(account);
        } else {
            pushBookmarksPrivateXml(account);
        }
    }

    private void pushBookmarksPrivateXml(Account account) {
        Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": pushing bookmarks via private xml");
        IqPacket iqPacket = new IqPacket(IqPacket.TYPE.SET);
        Element query = iqPacket.query("jabber:iq:private");
        Element storage = query.addChild("storage", "storage:bookmarks");
        for (Bookmark bookmark : account.getBookmarks()) {
            storage.addChild(bookmark);
        }
        sendIqPacket(account, iqPacket, mDefaultIqHandler);
    }

    private void pushBookmarksPep(Account account) {
        Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": pushing bookmarks via pep");
        Element storage = new Element("storage", "storage:bookmarks");
        for (Bookmark bookmark : account.getBookmarks()) {
            storage.addChild(bookmark);
        }
        pushNodeAndEnforcePublishOptions(account,Namespace.BOOKMARKS,storage, PublishOptions.persistentWhitelistAccess());

    }


    private void pushNodeAndEnforcePublishOptions(final Account account, final String node, final Element element, final Bundle options) {
        pushNodeAndEnforcePublishOptions(account, node, element, options, true);

    }

	private void pushNodeAndEnforcePublishOptions(final Account account, final String node, final Element element, final Bundle options, final boolean retry) {
        final IqPacket packet = mIqGenerator.publishElement(node, element, options);
        sendIqPacket(account, packet, (a, response) -> {
            if (response.getType() == IqPacket.TYPE.RESULT) {
                return;
            }
            if (retry && PublishOptions.preconditionNotMet(response)) {
                pushNodeConfiguration(account, node, options, new OnConfigurationPushed() {
                    @Override
                    public void onPushSucceeded() {
                        pushNodeAndEnforcePublishOptions(account, node, element, options, false);
                    }

                    @Override
                    public void onPushFailed() {
                        Log.d(Config.LOGTAG,account.getJid().asBareJid()+": unable to push node configuration ("+node+")");
                    }
                });
            } else {
                Log.d(Config.LOGTAG,account.getJid().asBareJid()+": error publishing bookmarks (retry="+Boolean.toString(retry)+") "+response);
            }
        });
    }

	private void restoreFromDatabase() {
		synchronized (this.conversations) {
			final Map<String, Account> accountLookupTable = new Hashtable<>();
			for (Account account : this.accounts) {
				accountLookupTable.put(account.getUuid(), account);
			}
			Log.d(Config.LOGTAG, "restoring conversations...");
			final long startTimeConversationsRestore = SystemClock.elapsedRealtime();
			this.conversations.addAll(databaseBackend.getConversations(Conversation.STATUS_AVAILABLE));
			for (Iterator<Conversation> iterator = conversations.listIterator(); iterator.hasNext(); ) {
				Conversation conversation = iterator.next();
				Account account = accountLookupTable.get(conversation.getAccountUuid());
				if (account != null) {
					conversation.setAccount(account);
				} else {
					Log.e(Config.LOGTAG, "unable to restore Conversations with " + conversation.getJid());
					iterator.remove();
				}
			}
			long diffConversationsRestore = SystemClock.elapsedRealtime() - startTimeConversationsRestore;
			Log.d(Config.LOGTAG, "finished restoring conversations in " + diffConversationsRestore + "ms");
			Runnable runnable = () -> {
				long deletionDate = getAutomaticMessageDeletionDate();
				mLastExpiryRun.set(SystemClock.elapsedRealtime());
				if (deletionDate > 0) {
					Log.d(Config.LOGTAG, "deleting messages that are older than " + AbstractGenerator.getTimestamp(deletionDate));
					databaseBackend.expireOldMessages(deletionDate);
				}
				Log.d(Config.LOGTAG, "restoring roster...");
				for (Account account : accounts) {
					databaseBackend.readRoster(account.getRoster());
					account.initAccountServices(XmppConnectionService.this); //roster needs to be loaded at this stage
				}
				getBitmapCache().evictAll();
				loadPhoneContacts();
				Log.d(Config.LOGTAG, "restoring messages...");
				final long startMessageRestore = SystemClock.elapsedRealtime();
				final Conversation quickLoad = QuickLoader.get(this.conversations);
				if (quickLoad != null) {
					restoreMessages(quickLoad);
					updateConversationUi();
					final long diffMessageRestore = SystemClock.elapsedRealtime() - startMessageRestore;
					Log.d(Config.LOGTAG,"quickly restored "+quickLoad.getName()+" after " + diffMessageRestore + "ms");
				}
				for (Conversation conversation : this.conversations) {
					if (quickLoad != conversation) {
						restoreMessages(conversation);
					}
				}
				mNotificationService.finishBacklog(false);
				restoredFromDatabaseLatch.countDown();
				final long diffMessageRestore = SystemClock.elapsedRealtime() - startMessageRestore;
				Log.d(Config.LOGTAG, "finished restoring messages in " + diffMessageRestore + "ms");
				updateConversationUi();
			};
			mDatabaseReaderExecutor.execute(runnable); //will contain one write command (expiry) but that's fine
		}
	}

	private void restoreMessages(Conversation conversation) {
		conversation.addAll(0, databaseBackend.getMessages(conversation, Config.PAGE_SIZE));
		conversation.findUnsentTextMessages(message -> markMessage(message, Message.STATUS_WAITING));
		conversation.findUnreadMessages(message -> mNotificationService.pushFromBacklog(message));
	}

	public void loadPhoneContacts() {
        mContactMergerExecutor.execute(() -> {
            Map<Jid, JabberIdContact> contacts = JabberIdContact.load(this);
            Log.d(Config.LOGTAG, "start merging phone contacts with roster");
            for (Account account : accounts) {
                List<Contact> withSystemAccounts = account.getRoster().getWithSystemAccounts(JabberIdContact.class);
                for (JabberIdContact jidContact : contacts.values()) {
                    final Contact contact = account.getRoster().getContact(jidContact.getJid());
                    boolean needsCacheClean = contact.setPhoneContact(jidContact);
                    if (needsCacheClean) {
                        getAvatarService().clear(contact);
                    }
                    withSystemAccounts.remove(contact);
                }
                for (Contact contact : withSystemAccounts) {
                    boolean needsCacheClean = contact.unsetPhoneContact(JabberIdContact.class);
                    if (needsCacheClean) {
                        getAvatarService().clear(contact);
                    }
                }
            }
            Log.d(Config.LOGTAG, "finished merging phone contacts");
            mShortcutService.refresh(mInitialAddressbookSyncCompleted.compareAndSet(false, true));
            updateRosterUi();
            mQuickConversationsService.considerSync();
        });
	}


	public void syncRoster(final Account account) {
		mRosterSyncTaskManager.execute(account, () -> databaseBackend.writeRoster(account.getRoster()));
	}

	public List<Conversation> getConversations() {
		return this.conversations;
	}

	private void markFileDeleted(final String path) {
        final File file = new File(path);
        final boolean isInternalFile = fileBackend.isInternalFile(file);
        final List<String> uuids = databaseBackend.markFileAsDeleted(file, isInternalFile);
        Log.d(Config.LOGTAG, "deleted file " + path+" internal="+isInternalFile+", database hits="+uuids.size());
        markUuidsAsDeletedFiles(uuids);
	}

	private void markUuidsAsDeletedFiles(List<String> uuids) {
        boolean deleted = false;
        for (Conversation conversation : getConversations()) {
            deleted |= conversation.markAsDeleted(uuids);
        }
        if (deleted) {
            updateConversationUi();
        }
    }

    private void markChangedFiles(List<DatabaseBackend.FilePathInfo> infos) {
        boolean changed = false;
        for (Conversation conversation : getConversations()) {
            changed |= conversation.markAsChanged(infos);
        }
        if (changed) {
            updateConversationUi();
        }
    }

	public void populateWithOrderedConversations(final List<Conversation> list) {
		populateWithOrderedConversations(list, true, true);
	}

	public void populateWithOrderedConversations(final List<Conversation> list, final boolean includeNoFileUpload) {
        populateWithOrderedConversations(list, includeNoFileUpload, true);
    }

	public void populateWithOrderedConversations(final List<Conversation> list, final boolean includeNoFileUpload, final boolean sort) {
        final List<String> orderedUuids;
        if (sort) {
            orderedUuids = null;
        } else {
            orderedUuids = new ArrayList<>();
            for(Conversation conversation : list) {
                orderedUuids.add(conversation.getUuid());
            }
        }
		list.clear();
		if (includeNoFileUpload) {
			list.addAll(getConversations());
		} else {
			for (Conversation conversation : getConversations()) {
				if (conversation.getMode() == Conversation.MODE_SINGLE
						|| (conversation.getAccount().httpUploadAvailable() && conversation.getMucOptions().participating())) {
					list.add(conversation);
				}
			}
		}
		try {
		    if (orderedUuids != null) {
                Collections.sort(list, (a, b) -> {
                    final int indexA = orderedUuids.indexOf(a.getUuid());
                    final int indexB = orderedUuids.indexOf(b.getUuid());
                    if (indexA == -1 || indexB == -1 || indexA == indexB) {
                        return a.compareTo(b);
                    }
                    return indexA - indexB;
                });
            } else {
                Collections.sort(list);
            }
		} catch (IllegalArgumentException e) {
			//ignore
		}
	}

	public void loadMoreMessages(final Conversation conversation, final long timestamp, final OnMoreMessagesLoaded callback) {
		if (XmppConnectionService.this.getMessageArchiveService().queryInProgress(conversation, callback)) {
			return;
		} else if (timestamp == 0) {
			return;
		}
		Log.d(Config.LOGTAG, "load more messages for " + conversation.getName() + " prior to " + MessageGenerator.getTimestamp(timestamp));
		final Runnable runnable = () -> {
			final Account account = conversation.getAccount();
			List<Message> messages = databaseBackend.getMessages(conversation, 50, timestamp);
			if (messages.size() > 0) {
				conversation.addAll(0, messages);
				callback.onMoreMessagesLoaded(messages.size(), conversation);
			} else if (conversation.hasMessagesLeftOnServer()
					&& account.isOnlineAndConnected()
					&& conversation.getLastClearHistory().getTimestamp() == 0) {
				final boolean mamAvailable;
				if (conversation.getMode() == Conversation.MODE_SINGLE) {
					mamAvailable = account.getXmppConnection().getFeatures().mam() && !conversation.getContact().isBlocked();
				} else {
					mamAvailable = conversation.getMucOptions().mamSupport();
				}
				if (mamAvailable) {
					MessageArchiveService.Query query = getMessageArchiveService().query(conversation, new MamReference(0), timestamp, false);
					if (query != null) {
						query.setCallback(callback);
						callback.informUser(R.string.fetching_history_from_server);
					} else {
						callback.informUser(R.string.not_fetching_history_retention_period);
					}

				}
			}
		};
		mDatabaseReaderExecutor.execute(runnable);
	}

	public List<Account> getAccounts() {
		return this.accounts;
	}


    /**
     * This will find all conferences with the contact as member and also the conference that is the contact (that 'fake' contact is used to store the avatar)
     */
	public List<Conversation> findAllConferencesWith(Contact contact) {
		ArrayList<Conversation> results = new ArrayList<>();
		for (final Conversation c : conversations) {
			if (c.getMode() == Conversation.MODE_MULTI && (c.getJid().asBareJid().equals(contact.getJid().asBareJid()) || c.getMucOptions().isContactInRoom(contact))) {
			    results.add(c);
			}
		}
		return results;
	}

	public Conversation find(final Iterable<Conversation> haystack, final Contact contact) {
		for (final Conversation conversation : haystack) {
			if (conversation.getContact() == contact) {
				return conversation;
			}
		}
		return null;
	}

	public Conversation find(final Iterable<Conversation> haystack, final Account account, final Jid jid) {
		if (jid == null) {
			return null;
		}
		for (final Conversation conversation : haystack) {
			if ((account == null || conversation.getAccount() == account)
					&& (conversation.getJid().asBareJid().equals(jid.asBareJid()))) {
				return conversation;
			}
		}
		return null;
	}

	public boolean isConversationsListEmpty(final Conversation ignore) {
		synchronized (this.conversations) {
			final int size = this.conversations.size();
			return size == 0 || size == 1 && this.conversations.get(0) == ignore;
		}
	}

	public boolean isConversationStillOpen(final Conversation conversation) {
		synchronized (this.conversations) {
			for (Conversation current : this.conversations) {
				if (current == conversation) {
					return true;
				}
			}
		}
		return false;
	}

	public Conversation findOrCreateConversation(Account account, Jid jid, boolean muc, final boolean async) {
		return this.findOrCreateConversation(account, jid, muc, false, async);
	}

	public Conversation findOrCreateConversation(final Account account, final Jid jid, final boolean muc, final boolean joinAfterCreate, final boolean async) {
		return this.findOrCreateConversation(account, jid, muc, joinAfterCreate, null, async);
	}

	public Conversation findOrCreateConversation(final Account account, final Jid jid, final boolean muc, final boolean joinAfterCreate, final MessageArchiveService.Query query, final boolean async) {
		synchronized (this.conversations) {
			Conversation conversation = find(account, jid);
			if (conversation != null) {
				return conversation;
			}
			conversation = databaseBackend.findConversation(account, jid);
			final boolean loadMessagesFromDb;
			if (conversation != null) {
				conversation.setStatus(Conversation.STATUS_AVAILABLE);
				conversation.setAccount(account);
				if (muc) {
					conversation.setMode(Conversation.MODE_MULTI);
					conversation.setContactJid(jid);
				} else {
					conversation.setMode(Conversation.MODE_SINGLE);
					conversation.setContactJid(jid.asBareJid());
				}
				databaseBackend.updateConversation(conversation);
				loadMessagesFromDb = conversation.messagesLoaded.compareAndSet(true, false);
			} else {
				String conversationName;
				Contact contact = account.getRoster().getContact(jid);
				if (contact != null) {
					conversationName = contact.getDisplayName();
				} else {
					conversationName = jid.getLocal();
				}
				if (muc) {
					conversation = new Conversation(conversationName, account, jid,
							Conversation.MODE_MULTI);
				} else {
					conversation = new Conversation(conversationName, account, jid.asBareJid(),
							Conversation.MODE_SINGLE);
				}
				this.databaseBackend.createConversation(conversation);
				loadMessagesFromDb = false;
			}
			final Conversation c = conversation;
			final Runnable runnable = () -> {
				if (loadMessagesFromDb) {
					c.addAll(0, databaseBackend.getMessages(c, Config.PAGE_SIZE));
					updateConversationUi();
					c.messagesLoaded.set(true);
				}
				if (account.getXmppConnection() != null
						&& !c.getContact().isBlocked()
						&& account.getXmppConnection().getFeatures().mam()
						&& !muc) {
					if (query == null) {
						mMessageArchiveService.query(c);
					} else {
						if (query.getConversation() == null) {
							mMessageArchiveService.query(c, query.getStart(), query.isCatchup());
						}
					}
				}
				if (joinAfterCreate) {
					joinMuc(c);
				}
			};
			if (async) {
				mDatabaseReaderExecutor.execute(runnable);
			} else {
				runnable.run();
			}
			this.conversations.add(conversation);
			updateConversationUi();
			return conversation;
		}
	}

	public void archiveConversation(Conversation conversation) {
	    archiveConversation(conversation, true);
    }

	private void archiveConversation(Conversation conversation, final boolean maySyncronizeWithBookmarks) {
		getNotificationService().clear(conversation);
		conversation.setStatus(Conversation.STATUS_ARCHIVED);
		conversation.setNextMessage(null);
		synchronized (this.conversations) {
			getMessageArchiveService().kill(conversation);
			if (conversation.getMode() == Conversation.MODE_MULTI) {
				if (conversation.getAccount().getStatus() == Account.State.ONLINE) {
					Bookmark bookmark = conversation.getBookmark();
					if (maySyncronizeWithBookmarks && bookmark != null && synchronizeWithBookmarks()) {
						if (conversation.getMucOptions().getError() == MucOptions.Error.DESTROYED) {
							Account account = bookmark.getAccount();
							bookmark.setConversation(null);
							account.getBookmarks().remove(bookmark);
							pushBookmarks(account);
						} else if (bookmark.autojoin()) {
							bookmark.setAutojoin(false);
							pushBookmarks(bookmark.getAccount());
						}
					}
				}
				leaveMuc(conversation);
			} else {
				if (conversation.getContact().getOption(Contact.Options.PENDING_SUBSCRIPTION_REQUEST)) {
				    stopPresenceUpdatesTo(conversation.getContact());
				}
			}
			updateConversation(conversation);
			this.conversations.remove(conversation);
			updateConversationUi();
		}
	}

	public void stopPresenceUpdatesTo(Contact contact) {
        Log.d(Config.LOGTAG, "Canceling presence request from " + contact.getJid().toString());
        sendPresencePacket(contact.getAccount(), mPresenceGenerator.stopPresenceUpdatesTo(contact));
        contact.resetOption(Contact.Options.PENDING_SUBSCRIPTION_REQUEST);
    }

	public void createAccount(final Account account) {
		account.initAccountServices(this);
		databaseBackend.createAccount(account);
		this.accounts.add(account);
		this.reconnectAccountInBackground(account);
		updateAccountUi();
		syncEnabledAccountSetting();
		toggleForegroundService();
	}

	private void syncEnabledAccountSetting() {
	    final boolean hasEnabledAccounts = hasEnabledAccounts();
		getPreferences().edit().putBoolean(EventReceiver.SETTING_ENABLED_ACCOUNTS, hasEnabledAccounts).apply();
		toggleSetProfilePictureActivity(hasEnabledAccounts);
	}

	private void toggleSetProfilePictureActivity(final boolean enabled) {
	    try {
	        final ComponentName name = new ComponentName(this, ChooseAccountForProfilePictureActivity.class);
	        final int targetState =  enabled ? PackageManager.COMPONENT_ENABLED_STATE_ENABLED : PackageManager.COMPONENT_ENABLED_STATE_DISABLED;
            getPackageManager().setComponentEnabledSetting(name, targetState, PackageManager.DONT_KILL_APP);
        } catch (IllegalStateException e) {
	        Log.d(Config.LOGTAG,"unable to toggle profile picture actvitiy");
        }
    }

	public void createAccountFromKey(final String alias, final OnAccountCreated callback) {
		new Thread(() -> {
			try {
				final X509Certificate[] chain = KeyChain.getCertificateChain(this, alias);
				final X509Certificate cert = chain != null && chain.length > 0 ? chain[0] : null;
				if (cert == null) {
					callback.informUser(R.string.unable_to_parse_certificate);
					return;
				}
				Pair<Jid, String> info = CryptoHelper.extractJidAndName(cert);
				if (info == null) {
					callback.informUser(R.string.certificate_does_not_contain_jid);
					return;
				}
				if (findAccountByJid(info.first) == null) {
					Account account = new Account(info.first, "");
					account.setPrivateKeyAlias(alias);
					account.setOption(Account.OPTION_DISABLED, true);
					account.setDisplayName(info.second);
					createAccount(account);
					callback.onAccountCreated(account);
					if (Config.X509_VERIFICATION) {
						try {
							getMemorizingTrustManager().getNonInteractive(account.getJid().getDomain()).checkClientTrusted(chain, "RSA");
						} catch (CertificateException e) {
							callback.informUser(R.string.certificate_chain_is_not_trusted);
						}
					}
				} else {
					callback.informUser(R.string.account_already_exists);
				}
			} catch (Exception e) {
				e.printStackTrace();
				callback.informUser(R.string.unable_to_parse_certificate);
			}
		}).start();

	}

	public void updateKeyInAccount(final Account account, final String alias) {
		Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": update key in account " + alias);
		try {
			X509Certificate[] chain = KeyChain.getCertificateChain(XmppConnectionService.this, alias);
			Log.d(Config.LOGTAG, account.getJid().asBareJid() + " loaded certificate chain");
			Pair<Jid, String> info = CryptoHelper.extractJidAndName(chain[0]);
			if (info == null) {
				showErrorToastInUi(R.string.certificate_does_not_contain_jid);
				return;
			}
			if (account.getJid().asBareJid().equals(info.first)) {
				account.setPrivateKeyAlias(alias);
				account.setDisplayName(info.second);
				databaseBackend.updateAccount(account);
				if (Config.X509_VERIFICATION) {
					try {
						getMemorizingTrustManager().getNonInteractive().checkClientTrusted(chain, "RSA");
					} catch (CertificateException e) {
						showErrorToastInUi(R.string.certificate_chain_is_not_trusted);
					}
					account.getAxolotlService().regenerateKeys(true);
				}
			} else {
				showErrorToastInUi(R.string.jid_does_not_match_certificate);
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	public boolean updateAccount(final Account account) {
		if (databaseBackend.updateAccount(account)) {
			account.setShowErrorNotification(true);
			this.statusListener.onStatusChanged(account);
			databaseBackend.updateAccount(account);
			reconnectAccountInBackground(account);
			updateAccountUi();
			getNotificationService().updateErrorNotification();
			toggleForegroundService();
			syncEnabledAccountSetting();
			return true;
		} else {
			return false;
		}
	}

	public void updateAccountPasswordOnServer(final Account account, final String newPassword, final OnAccountPasswordChanged callback) {
		final IqPacket iq = getIqGenerator().generateSetPassword(account, newPassword);
		sendIqPacket(account, iq, (a, packet) -> {
			if (packet.getType() == IqPacket.TYPE.RESULT) {
				a.setPassword(newPassword);
				a.setOption(Account.OPTION_MAGIC_CREATE, false);
				databaseBackend.updateAccount(a);
				callback.onPasswordChangeSucceeded();
			} else {
				callback.onPasswordChangeFailed();
			}
		});
	}

	public void deleteAccount(final Account account) {
		synchronized (this.conversations) {
			for (final Conversation conversation : conversations) {
				if (conversation.getAccount() == account) {
					if (conversation.getMode() == Conversation.MODE_MULTI) {
						leaveMuc(conversation);
					}
					conversations.remove(conversation);
				}
			}
			if (account.getXmppConnection() != null) {
				new Thread(() -> disconnect(account, true)).start();
			}
			final Runnable runnable = () -> {
				if (!databaseBackend.deleteAccount(account)) {
					Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": unable to delete account");
				}
			};
			mDatabaseWriterExecutor.execute(runnable);
			this.accounts.remove(account);
			this.mRosterSyncTaskManager.clear(account);
			updateAccountUi();
			getNotificationService().updateErrorNotification();
			syncEnabledAccountSetting();
			toggleForegroundService();
		}
	}

	public void setOnConversationListChangedListener(OnConversationUpdate listener) {
		final boolean remainingListeners;
		synchronized (LISTENER_LOCK) {
			remainingListeners = checkListeners();
			if (!this.mOnConversationUpdates.add(listener)) {
				Log.w(Config.LOGTAG,listener.getClass().getName()+" is already registered as ConversationListChangedListener");
			}
			this.mNotificationService.setIsInForeground(this.mOnConversationUpdates.size() > 0);
		}
		if (remainingListeners) {
			switchToForeground();
		}
	}

	public void removeOnConversationListChangedListener(OnConversationUpdate listener) {
		final boolean remainingListeners;
		synchronized (LISTENER_LOCK) {
			this.mOnConversationUpdates.remove(listener);
			this.mNotificationService.setIsInForeground(this.mOnConversationUpdates.size() > 0);
			remainingListeners = checkListeners();
		}
		if (remainingListeners) {
			switchToBackground();
		}
	}

	public void setOnShowErrorToastListener(OnShowErrorToast listener) {
		final boolean remainingListeners;
		synchronized (LISTENER_LOCK) {
			remainingListeners = checkListeners();
			if (!this.mOnShowErrorToasts.add(listener)) {
				Log.w(Config.LOGTAG,listener.getClass().getName()+" is already registered as OnShowErrorToastListener");
			}
		}
		if (remainingListeners) {
			switchToForeground();
		}
	}

	public void removeOnShowErrorToastListener(OnShowErrorToast onShowErrorToast) {
		final boolean remainingListeners;
		synchronized (LISTENER_LOCK) {
			this.mOnShowErrorToasts.remove(onShowErrorToast);
			remainingListeners = checkListeners();
		}
		if (remainingListeners) {
			switchToBackground();
		}
	}

	public void setOnAccountListChangedListener(OnAccountUpdate listener) {
		final boolean remainingListeners;
		synchronized (LISTENER_LOCK) {
			remainingListeners = checkListeners();
			if (!this.mOnAccountUpdates.add(listener)) {
				Log.w(Config.LOGTAG,listener.getClass().getName()+" is already registered as OnAccountListChangedtListener");
			}
		}
		if (remainingListeners) {
			switchToForeground();
		}
	}

	public void removeOnAccountListChangedListener(OnAccountUpdate listener) {
		final boolean remainingListeners;
		synchronized (LISTENER_LOCK) {
			this.mOnAccountUpdates.remove(listener);
			remainingListeners = checkListeners();
		}
		if (remainingListeners) {
			switchToBackground();
		}
	}

	public void setOnCaptchaRequestedListener(OnCaptchaRequested listener) {
		final boolean remainingListeners;
		synchronized (LISTENER_LOCK) {
			remainingListeners = checkListeners();
			if (!this.mOnCaptchaRequested.add(listener)) {
				Log.w(Config.LOGTAG,listener.getClass().getName()+" is already registered as OnCaptchaRequestListener");
			}
		}
		if (remainingListeners) {
			switchToForeground();
		}
	}

	public void removeOnCaptchaRequestedListener(OnCaptchaRequested listener) {
		final boolean remainingListeners;
		synchronized (LISTENER_LOCK) {
			this.mOnCaptchaRequested.remove(listener);
			remainingListeners = checkListeners();
		}
		if (remainingListeners) {
			switchToBackground();
		}
	}

	public void setOnRosterUpdateListener(final OnRosterUpdate listener) {
		final boolean remainingListeners;
		synchronized (LISTENER_LOCK) {
			remainingListeners = checkListeners();
			if (!this.mOnRosterUpdates.add(listener)) {
				Log.w(Config.LOGTAG,listener.getClass().getName()+" is already registered as OnRosterUpdateListener");
			}
		}
		if (remainingListeners) {
			switchToForeground();
		}
	}

	public void removeOnRosterUpdateListener(final OnRosterUpdate listener) {
		final boolean remainingListeners;
		synchronized (LISTENER_LOCK) {
			this.mOnRosterUpdates.remove(listener);
			remainingListeners = checkListeners();
		}
		if (remainingListeners) {
			switchToBackground();
		}
	}

	public void setOnUpdateBlocklistListener(final OnUpdateBlocklist listener) {
		final boolean remainingListeners;
		synchronized (LISTENER_LOCK) {
			remainingListeners = checkListeners();
			if (!this.mOnUpdateBlocklist.add(listener)) {
				Log.w(Config.LOGTAG,listener.getClass().getName()+" is already registered as OnUpdateBlocklistListener");
			}
		}
		if (remainingListeners) {
			switchToForeground();
		}
	}

	public void removeOnUpdateBlocklistListener(final OnUpdateBlocklist listener) {
		final boolean remainingListeners;
		synchronized (LISTENER_LOCK) {
			this.mOnUpdateBlocklist.remove(listener);
			remainingListeners = checkListeners();
		}
		if (remainingListeners) {
			switchToBackground();
		}
	}

	public void setOnKeyStatusUpdatedListener(final OnKeyStatusUpdated listener) {
		final boolean remainingListeners;
		synchronized (LISTENER_LOCK) {
			remainingListeners = checkListeners();
			if (!this.mOnKeyStatusUpdated.add(listener)) {
				Log.w(Config.LOGTAG,listener.getClass().getName()+" is already registered as OnKeyStatusUpdateListener");
			}
		}
		if (remainingListeners) {
			switchToForeground();
		}
	}

	public void removeOnNewKeysAvailableListener(final OnKeyStatusUpdated listener) {
		final boolean remainingListeners;
		synchronized (LISTENER_LOCK) {
			this.mOnKeyStatusUpdated.remove(listener);
			remainingListeners = checkListeners();
		}
		if (remainingListeners) {
			switchToBackground();
		}
	}

	public void setOnMucRosterUpdateListener(OnMucRosterUpdate listener) {
		final boolean remainingListeners;
		synchronized (LISTENER_LOCK) {
			remainingListeners = checkListeners();
			if (!this.mOnMucRosterUpdate.add(listener)) {
				Log.w(Config.LOGTAG,listener.getClass().getName()+" is already registered as OnMucRosterListener");
			}
		}
		if (remainingListeners) {
			switchToForeground();
		}
	}

	public void removeOnMucRosterUpdateListener(final OnMucRosterUpdate listener) {
		final boolean remainingListeners;
		synchronized (LISTENER_LOCK) {
			this.mOnMucRosterUpdate.remove(listener);
			remainingListeners = checkListeners();
		}
		if (remainingListeners) {
			switchToBackground();
		}
	}

	public boolean checkListeners() {
		return (this.mOnAccountUpdates.size() == 0
				&& this.mOnConversationUpdates.size() == 0
				&& this.mOnRosterUpdates.size() == 0
				&& this.mOnCaptchaRequested.size() == 0
				&& this.mOnMucRosterUpdate.size() == 0
				&& this.mOnUpdateBlocklist.size() == 0
				&& this.mOnShowErrorToasts.size() == 0
				&& this.mOnKeyStatusUpdated.size() == 0);
	}

	private void switchToForeground() {
		final boolean broadcastLastActivity = broadcastLastActivity();
		for (Conversation conversation : getConversations()) {
			if (conversation.getMode() == Conversation.MODE_MULTI) {
				conversation.getMucOptions().resetChatState();
			} else {
				conversation.setIncomingChatState(Config.DEFAULT_CHATSTATE);
			}
		}
		for (Account account : getAccounts()) {
			if (account.getStatus() == Account.State.ONLINE) {
				account.deactivateGracePeriod();
				final XmppConnection connection = account.getXmppConnection();
				if (connection != null) {
					if (connection.getFeatures().csi()) {
						connection.sendActive();
					}
					if (broadcastLastActivity) {
						sendPresence(account, false); //send new presence but don't include idle because we are not
					}
				}
			}
		}
		Log.d(Config.LOGTAG, "app switched into foreground");
	}

	private void switchToBackground() {
		final boolean broadcastLastActivity = broadcastLastActivity();
		if (broadcastLastActivity) {
			mLastActivity = System.currentTimeMillis();
			final SharedPreferences.Editor editor = getPreferences().edit();
			editor.putLong(SETTING_LAST_ACTIVITY_TS, mLastActivity);
			editor.apply();
		}
		for (Account account : getAccounts()) {
			if (account.getStatus() == Account.State.ONLINE) {
				XmppConnection connection = account.getXmppConnection();
				if (connection != null) {
					if (broadcastLastActivity) {
						sendPresence(account, true);
					}
					if (connection.getFeatures().csi()) {
						connection.sendInactive();
					}
				}
			}
		}
		this.mNotificationService.setIsInForeground(false);
		Log.d(Config.LOGTAG, "app switched into background");
	}

	private void connectMultiModeConversations(Account account) {
		List<Conversation> conversations = getConversations();
		for (Conversation conversation : conversations) {
			if (conversation.getMode() == Conversation.MODE_MULTI && conversation.getAccount() == account) {
				joinMuc(conversation);
			}
		}
	}

	public void joinMuc(Conversation conversation) {
		joinMuc(conversation, null, false);
	}

	public void joinMuc(Conversation conversation, boolean followedInvite) {
		joinMuc(conversation, null, followedInvite);
	}

	private void joinMuc(Conversation conversation, final OnConferenceJoined onConferenceJoined) {
		joinMuc(conversation, onConferenceJoined, false);
	}

	private void joinMuc(Conversation conversation, final OnConferenceJoined onConferenceJoined, final boolean followedInvite) {
		Account account = conversation.getAccount();
		account.pendingConferenceJoins.remove(conversation);
		account.pendingConferenceLeaves.remove(conversation);
		if (account.getStatus() == Account.State.ONLINE) {
			sendPresencePacket(account, mPresenceGenerator.leave(conversation.getMucOptions()));
			conversation.resetMucOptions();
			if (onConferenceJoined != null) {
				conversation.getMucOptions().flagNoAutoPushConfiguration();
			}
			conversation.setHasMessagesLeftOnServer(false);
			fetchConferenceConfiguration(conversation, new OnConferenceConfigurationFetched() {

				private void join(Conversation conversation) {
					Account account = conversation.getAccount();
					final MucOptions mucOptions = conversation.getMucOptions();

					if (mucOptions.nonanonymous() && !mucOptions.membersOnly() && !conversation.getBooleanAttribute("accept_non_anonymous", false)) {
					    mucOptions.setError(MucOptions.Error.NON_ANONYMOUS);
					    updateConversationUi();
                        if (onConferenceJoined != null) {
                            onConferenceJoined.onConferenceJoined(conversation);
                        }
					    return;
                    }

					final Jid joinJid = mucOptions.getSelf().getFullJid();
					Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": joining conversation " + joinJid.toString());
					PresencePacket packet = mPresenceGenerator.selfPresence(account, Presence.Status.ONLINE, mucOptions.nonanonymous() || onConferenceJoined != null);
					packet.setTo(joinJid);
					Element x = packet.addChild("x", "http://jabber.org/protocol/muc");
					if (conversation.getMucOptions().getPassword() != null) {
						x.addChild("password").setContent(mucOptions.getPassword());
					}

					if (mucOptions.mamSupport()) {
						// Use MAM instead of the limited muc history to get history
						x.addChild("history").setAttribute("maxchars", "0");
					} else {
						// Fallback to muc history
						x.addChild("history").setAttribute("since", PresenceGenerator.getTimestamp(conversation.getLastMessageTransmitted().getTimestamp()));
					}
					sendPresencePacket(account, packet);
					if (onConferenceJoined != null) {
						onConferenceJoined.onConferenceJoined(conversation);
					}
					if (!joinJid.equals(conversation.getJid())) {
						conversation.setContactJid(joinJid);
						databaseBackend.updateConversation(conversation);
					}

					if (mucOptions.mamSupport()) {
						getMessageArchiveService().catchupMUC(conversation);
					}
					if (mucOptions.isPrivateAndNonAnonymous()) {
						fetchConferenceMembers(conversation);
						if (followedInvite && conversation.getBookmark() == null) {
							saveConversationAsBookmark(conversation, null);
						}
					}
					sendUnsentMessages(conversation);
				}

				@Override
				public void onConferenceConfigurationFetched(Conversation conversation) {
				    if (conversation.getStatus() == Conversation.STATUS_ARCHIVED) {
				        Log.d(Config.LOGTAG,account.getJid().asBareJid()+": conversation ("+conversation.getJid()+") got archived before IQ result");
				        return;
                    }
					join(conversation);
				}

				@Override
				public void onFetchFailed(final Conversation conversation, Element error) {
                    if (conversation.getStatus() == Conversation.STATUS_ARCHIVED) {
                        Log.d(Config.LOGTAG,account.getJid().asBareJid()+": conversation ("+conversation.getJid()+") got archived before IQ result");
                        return;
                    }
					if (error != null && "remote-server-not-found".equals(error.getName())) {
						conversation.getMucOptions().setError(MucOptions.Error.SERVER_NOT_FOUND);
						updateConversationUi();
					} else {
						join(conversation);
						fetchConferenceConfiguration(conversation);
					}
				}
			});
			updateConversationUi();
		} else {
			account.pendingConferenceJoins.add(conversation);
			conversation.resetMucOptions();
			conversation.setHasMessagesLeftOnServer(false);
			updateConversationUi();
		}
	}

	private void fetchConferenceMembers(final Conversation conversation) {
		final Account account = conversation.getAccount();
		final AxolotlService axolotlService = account.getAxolotlService();
		final String[] affiliations = {"member", "admin", "owner"};
		OnIqPacketReceived callback = new OnIqPacketReceived() {

			private int i = 0;
			private boolean success = true;

			@Override
			public void onIqPacketReceived(Account account, IqPacket packet) {
				final boolean omemoEnabled = conversation.getNextEncryption() == Message.ENCRYPTION_AXOLOTL;
				Element query = packet.query("http://jabber.org/protocol/muc#admin");
				if (packet.getType() == IqPacket.TYPE.RESULT && query != null) {
					for (Element child : query.getChildren()) {
						if ("item".equals(child.getName())) {
							MucOptions.User user = AbstractParser.parseItem(conversation, child);
							if (!user.realJidMatchesAccount()) {
								boolean isNew = conversation.getMucOptions().updateUser(user);
								Contact contact = user.getContact();
								if (omemoEnabled
										&& isNew
										&& user.getRealJid() != null
										&& (contact == null || !contact.mutualPresenceSubscription())
										&& axolotlService.hasEmptyDeviceList(user.getRealJid())) {
									axolotlService.fetchDeviceIds(user.getRealJid());
								}
							}
						}
					}
				} else {
					success = false;
					Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": could not request affiliation " + affiliations[i] + " in " + conversation.getJid().asBareJid());
				}
				++i;
				if (i >= affiliations.length) {
					List<Jid> members = conversation.getMucOptions().getMembers(true);
					if (success) {
						List<Jid> cryptoTargets = conversation.getAcceptedCryptoTargets();
						boolean changed = false;
						for (ListIterator<Jid> iterator = cryptoTargets.listIterator(); iterator.hasNext(); ) {
							Jid jid = iterator.next();
							if (!members.contains(jid) && !members.contains(Jid.ofDomain(jid.getDomain()))) {
								iterator.remove();
								Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": removed " + jid + " from crypto targets of " + conversation.getName());
								changed = true;
							}
						}
						if (changed) {
							conversation.setAcceptedCryptoTargets(cryptoTargets);
							updateConversation(conversation);
						}
					}
					getAvatarService().clear(conversation);
					updateMucRosterUi();
					updateConversationUi();
				}
			}
		};
		for (String affiliation : affiliations) {
			sendIqPacket(account, mIqGenerator.queryAffiliation(conversation, affiliation), callback);
		}
		Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": fetching members for " + conversation.getName());
	}

	public void providePasswordForMuc(Conversation conversation, String password) {
		if (conversation.getMode() == Conversation.MODE_MULTI) {
			conversation.getMucOptions().setPassword(password);
			if (conversation.getBookmark() != null) {
				if (synchronizeWithBookmarks()) {
					conversation.getBookmark().setAutojoin(true);
				}
				pushBookmarks(conversation.getAccount());
			}
			updateConversation(conversation);
			joinMuc(conversation);
		}
	}

	private boolean hasEnabledAccounts() {
	    if (this.accounts == null) {
	        return false;
	    }
	    for (Account account : this.accounts) {
	        if (account.isEnabled()) {
	            return true;
	        }
	    }
	    return false;
	}


	public void getAttachments(final Conversation conversation, int limit, final OnMediaLoaded onMediaLoaded) {
        getAttachments(conversation.getAccount(), conversation.getJid().asBareJid(), limit, onMediaLoaded);
    }

    public void getAttachments(final Account account, final Jid jid, final int limit, final OnMediaLoaded onMediaLoaded) {
        getAttachments(account.getUuid(),jid.asBareJid(),limit, onMediaLoaded);
    }


	public void getAttachments(final String account, final Jid jid, final int limit, final OnMediaLoaded onMediaLoaded) {
        new Thread(() -> onMediaLoaded.onMediaLoaded(fileBackend.convertToAttachments(databaseBackend.getRelativeFilePaths(account, jid, limit)))).start();
    }

	public void persistSelfNick(MucOptions.User self) {
		final Conversation conversation = self.getConversation();
		final boolean tookProposedNickFromBookmark = conversation.getMucOptions().isTookProposedNickFromBookmark();
		Jid full = self.getFullJid();
		if (!full.equals(conversation.getJid())) {
			Log.d(Config.LOGTAG, "nick changed. updating");
			conversation.setContactJid(full);
			databaseBackend.updateConversation(conversation);
		}

		final Bookmark bookmark = conversation.getBookmark();
		final String bookmarkedNick = bookmark == null ? null : bookmark.getNick();
        if (bookmark != null && (tookProposedNickFromBookmark || TextUtils.isEmpty(bookmarkedNick)) && !full.getResource().equals(bookmarkedNick)) {
            Log.d(Config.LOGTAG, conversation.getAccount().getJid().asBareJid() + ": persist nick '" + full.getResource() + "' into bookmark for " + conversation.getJid().asBareJid());
            bookmark.setNick(full.getResource());
            pushBookmarks(bookmark.getAccount());
        }
	}

	public boolean renameInMuc(final Conversation conversation, final String nick, final UiCallback<Conversation> callback) {
		final MucOptions options = conversation.getMucOptions();
		final Jid joinJid = options.createJoinJid(nick);
		if (joinJid == null) {
			return false;
		}
		if (options.online()) {
			Account account = conversation.getAccount();
			options.setOnRenameListener(new OnRenameListener() {

				@Override
				public void onSuccess() {
					callback.success(conversation);
				}

				@Override
				public void onFailure() {
					callback.error(R.string.nick_in_use, conversation);
				}
			});

			PresencePacket packet = new PresencePacket();
			packet.setTo(joinJid);
			packet.setFrom(conversation.getAccount().getJid());

			String sig = account.getPgpSignature();
			if (sig != null) {
				packet.addChild("status").setContent("online");
				packet.addChild("x", "jabber:x:signed").setContent(sig);
			}
			sendPresencePacket(account, packet);
		} else {
			conversation.setContactJid(joinJid);
			databaseBackend.updateConversation(conversation);
			if (conversation.getAccount().getStatus() == Account.State.ONLINE) {
				Bookmark bookmark = conversation.getBookmark();
				if (bookmark != null) {
					bookmark.setNick(nick);
					pushBookmarks(bookmark.getAccount());
				}
				joinMuc(conversation);
			}
		}
		return true;
	}

	public void leaveMuc(Conversation conversation) {
		leaveMuc(conversation, false);
	}

	private void leaveMuc(Conversation conversation, boolean now) {
		Account account = conversation.getAccount();
		account.pendingConferenceJoins.remove(conversation);
		account.pendingConferenceLeaves.remove(conversation);
		if (account.getStatus() == Account.State.ONLINE || now) {
			sendPresencePacket(conversation.getAccount(), mPresenceGenerator.leave(conversation.getMucOptions()));
			conversation.getMucOptions().setOffline();
			Bookmark bookmark = conversation.getBookmark();
			if (bookmark != null) {
				bookmark.setConversation(null);
			}
			Log.d(Config.LOGTAG, conversation.getAccount().getJid().asBareJid() + ": leaving muc " + conversation.getJid());
		} else {
			account.pendingConferenceLeaves.add(conversation);
		}
	}

	public String findConferenceServer(final Account account) {
		String server;
		if (account.getXmppConnection() != null) {
			server = account.getXmppConnection().getMucServer();
			if (server != null) {
				return server;
			}
		}
		for (Account other : getAccounts()) {
			if (other != account && other.getXmppConnection() != null) {
				server = other.getXmppConnection().getMucServer();
				if (server != null) {
					return server;
				}
			}
		}
		return null;
	}


	public void createPublicChannel(final Account account, final String name, final Jid address, final UiCallback<Conversation> callback) {
        joinMuc(findOrCreateConversation(account, address, true, false, true), conversation -> {
            final Bundle configuration = IqGenerator.defaultChannelConfiguration();
            if (!TextUtils.isEmpty(name)) {
                configuration.putString("muc#roomconfig_roomname", name);
            }
            pushConferenceConfiguration(conversation, configuration, new OnConfigurationPushed() {
                @Override
                public void onPushSucceeded() {
                    saveConversationAsBookmark(conversation, name);
                    callback.success(conversation);
                }

                @Override
                public void onPushFailed() {
                    if (conversation.getMucOptions().getSelf().getAffiliation().ranks(MucOptions.Affiliation.OWNER)) {
                        callback.error(R.string.unable_to_set_channel_configuration, conversation);
                    } else {
                        callback.error(R.string.joined_an_existing_channel, conversation);
                    }
                }
            });
        });
    }

	public boolean createAdhocConference(final Account account,
	                                     final String name,
	                                     final Iterable<Jid> jids,
	                                     final UiCallback<Conversation> callback) {
		Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": creating adhoc conference with " + jids.toString());
		if (account.getStatus() == Account.State.ONLINE) {
			try {
				String server = findConferenceServer(account);
				if (server == null) {
					if (callback != null) {
						callback.error(R.string.no_conference_server_found, null);
					}
					return false;
				}
				final Jid jid = Jid.of(CryptoHelper.pronounceable(getRNG()), server, null);
				final Conversation conversation = findOrCreateConversation(account, jid, true, false, true);
				joinMuc(conversation, new OnConferenceJoined() {
					@Override
					public void onConferenceJoined(final Conversation conversation) {
						final Bundle configuration = IqGenerator.defaultGroupChatConfiguration();
						if (!TextUtils.isEmpty(name)) {
							configuration.putString("muc#roomconfig_roomname", name);
						}
						pushConferenceConfiguration(conversation, configuration, new OnConfigurationPushed() {
							@Override
							public void onPushSucceeded() {
								for (Jid invite : jids) {
									invite(conversation, invite);
								}
								if (account.countPresences() > 1) {
									directInvite(conversation, account.getJid().asBareJid());
								}
								saveConversationAsBookmark(conversation, name);
								if (callback != null) {
									callback.success(conversation);
								}
							}

							@Override
							public void onPushFailed() {
								archiveConversation(conversation);
								if (callback != null) {
									callback.error(R.string.conference_creation_failed, conversation);
								}
							}
						});
					}
				});
				return true;
			} catch (IllegalArgumentException e) {
				if (callback != null) {
					callback.error(R.string.conference_creation_failed, null);
				}
				return false;
			}
		} else {
			if (callback != null) {
				callback.error(R.string.not_connected_try_again, null);
			}
			return false;
		}
	}

	public void fetchConferenceConfiguration(final Conversation conversation) {
		fetchConferenceConfiguration(conversation, null);
	}

	public void fetchConferenceConfiguration(final Conversation conversation, final OnConferenceConfigurationFetched callback) {
		IqPacket request = new IqPacket(IqPacket.TYPE.GET);
		request.setTo(conversation.getJid().asBareJid());
		request.query("http://jabber.org/protocol/disco#info");
		sendIqPacket(conversation.getAccount(), request, new OnIqPacketReceived() {
			@Override
			public void onIqPacketReceived(Account account, IqPacket packet) {
				if (packet.getType() == IqPacket.TYPE.RESULT) {

					final MucOptions mucOptions = conversation.getMucOptions();
					final Bookmark bookmark = conversation.getBookmark();
					final boolean sameBefore = StringUtils.equals(bookmark == null ? null : bookmark.getBookmarkName(), mucOptions.getName());

					if (mucOptions.updateConfiguration(new ServiceDiscoveryResult(packet))) {
						Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": muc configuration changed for " + conversation.getJid().asBareJid());
						updateConversation(conversation);
					}

					if (bookmark != null && (sameBefore || bookmark.getBookmarkName() == null)) {
						if (bookmark.setBookmarkName(StringUtils.nullOnEmpty(mucOptions.getName()))) {
							pushBookmarks(account);
						}
					}


					if (callback != null) {
						callback.onConferenceConfigurationFetched(conversation);
					}



					updateConversationUi();
				} else if (packet.getType() == IqPacket.TYPE.ERROR) {
					if (callback != null) {
						callback.onFetchFailed(conversation, packet.getError());
					}
				}
			}
		});
	}

	public void pushNodeConfiguration(Account account, final String node, final Bundle options, final OnConfigurationPushed callback) {
		pushNodeConfiguration(account, account.getJid().asBareJid(), node, options, callback);
	}

	public void pushNodeConfiguration(Account account, final Jid jid, final String node, final Bundle options, final OnConfigurationPushed callback) {
        Log.d(Config.LOGTAG,"pushing node configuration");
		sendIqPacket(account, mIqGenerator.requestPubsubConfiguration(jid, node), new OnIqPacketReceived() {
			@Override
			public void onIqPacketReceived(Account account, IqPacket packet) {
				if (packet.getType() == IqPacket.TYPE.RESULT) {
					Element pubsub = packet.findChild("pubsub", "http://jabber.org/protocol/pubsub#owner");
					Element configuration = pubsub == null ? null : pubsub.findChild("configure");
					Element x = configuration == null ? null : configuration.findChild("x", Namespace.DATA);
					if (x != null) {
						Data data = Data.parse(x);
						data.submit(options);
						sendIqPacket(account, mIqGenerator.publishPubsubConfiguration(jid, node, data), new OnIqPacketReceived() {
							@Override
							public void onIqPacketReceived(Account account, IqPacket packet) {
								if (packet.getType() == IqPacket.TYPE.RESULT && callback != null) {
									Log.d(Config.LOGTAG,account.getJid().asBareJid()+": successfully changed node configuration for node "+node);
									callback.onPushSucceeded();
								} else if (packet.getType() == IqPacket.TYPE.ERROR && callback != null) {
									callback.onPushFailed();
								}
							}
						});
					} else if (callback != null) {
						callback.onPushFailed();
					}
				} else if (packet.getType() == IqPacket.TYPE.ERROR && callback != null) {
					callback.onPushFailed();
				}
			}
		});
	}

	public void pushConferenceConfiguration(final Conversation conversation, final Bundle options, final OnConfigurationPushed callback) {
		IqPacket request = new IqPacket(IqPacket.TYPE.GET);
		request.setTo(conversation.getJid().asBareJid());
		request.query("http://jabber.org/protocol/muc#owner");
		sendIqPacket(conversation.getAccount(), request, new OnIqPacketReceived() {
			@Override
			public void onIqPacketReceived(Account account, IqPacket packet) {
				if (packet.getType() == IqPacket.TYPE.RESULT) {
					Data data = Data.parse(packet.query().findChild("x", Namespace.DATA));
					data.submit(options);
					IqPacket set = new IqPacket(IqPacket.TYPE.SET);
					set.setTo(conversation.getJid().asBareJid());
					set.query("http://jabber.org/protocol/muc#owner").addChild(data);
					sendIqPacket(account, set, new OnIqPacketReceived() {
						@Override
						public void onIqPacketReceived(Account account, IqPacket packet) {
							if (callback != null) {
								if (packet.getType() == IqPacket.TYPE.RESULT) {
									callback.onPushSucceeded();
								} else {
									callback.onPushFailed();
								}
							}
						}
					});
				} else {
					if (callback != null) {
						callback.onPushFailed();
					}
				}
			}
		});
	}

	public void pushSubjectToConference(final Conversation conference, final String subject) {
		MessagePacket packet = this.getMessageGenerator().conferenceSubject(conference, StringUtils.nullOnEmpty(subject));
		this.sendMessagePacket(conference.getAccount(), packet);
	}

	public void changeAffiliationInConference(final Conversation conference, Jid user, final MucOptions.Affiliation affiliation, final OnAffiliationChanged callback) {
		final Jid jid = user.asBareJid();
		IqPacket request = this.mIqGenerator.changeAffiliation(conference, jid, affiliation.toString());
		sendIqPacket(conference.getAccount(), request, new OnIqPacketReceived() {
			@Override
			public void onIqPacketReceived(Account account, IqPacket packet) {
				if (packet.getType() == IqPacket.TYPE.RESULT) {
					conference.getMucOptions().changeAffiliation(jid, affiliation);
					getAvatarService().clear(conference);
					callback.onAffiliationChangedSuccessful(jid);
				} else {
					callback.onAffiliationChangeFailed(jid, R.string.could_not_change_affiliation);
				}
			}
		});
	}

	public void changeAffiliationsInConference(final Conversation conference, MucOptions.Affiliation before, MucOptions.Affiliation after) {
		List<Jid> jids = new ArrayList<>();
		for (MucOptions.User user : conference.getMucOptions().getUsers()) {
			if (user.getAffiliation() == before && user.getRealJid() != null) {
				jids.add(user.getRealJid());
			}
		}
		IqPacket request = this.mIqGenerator.changeAffiliation(conference, jids, after.toString());
		sendIqPacket(conference.getAccount(), request, mDefaultIqHandler);
	}

	public void changeRoleInConference(final Conversation conference, final String nick, MucOptions.Role role) {
		IqPacket request = this.mIqGenerator.changeRole(conference, nick, role.toString());
		Log.d(Config.LOGTAG, request.toString());
		sendIqPacket(conference.getAccount(), request, (account, packet) -> {
            if (packet.getType() != IqPacket.TYPE.RESULT) {
                Log.d(Config.LOGTAG,account.getJid().asBareJid()+" unable to change role of "+nick);
            }
        });
	}

    public void destroyRoom(final Conversation conversation, final OnRoomDestroy callback) {
        IqPacket request = new IqPacket(IqPacket.TYPE.SET);
        request.setTo(conversation.getJid().asBareJid());
        request.query("http://jabber.org/protocol/muc#owner").addChild("destroy");
        sendIqPacket(conversation.getAccount(), request, new OnIqPacketReceived() {
            @Override
            public void onIqPacketReceived(Account account, IqPacket packet) {
                if (packet.getType() == IqPacket.TYPE.RESULT) {
                    if (callback != null) {
                        callback.onRoomDestroySucceeded();
                    }
                } else if (packet.getType() == IqPacket.TYPE.ERROR) {
                    if (callback != null) {
                        callback.onRoomDestroyFailed();
                    }
                }
            }
        });
    }

	private void disconnect(Account account, boolean force) {
		if ((account.getStatus() == Account.State.ONLINE)
				|| (account.getStatus() == Account.State.DISABLED)) {
			final XmppConnection connection = account.getXmppConnection();
			if (!force) {
				List<Conversation> conversations = getConversations();
				for (Conversation conversation : conversations) {
					if (conversation.getAccount() == account) {
						if (conversation.getMode() == Conversation.MODE_MULTI) {
							leaveMuc(conversation, true);
						}
					}
				}
				sendOfflinePresence(account);
			}
			connection.disconnect(force);
		}
	}

	@Override
	public IBinder onBind(Intent intent) {
		return mBinder;
	}

	public void updateMessage(Message message) {
		updateMessage(message, true);
	}

	public void updateMessage(Message message, boolean includeBody) {
		databaseBackend.updateMessage(message, includeBody);
		updateConversationUi();
	}

	public void updateMessage(Message message, String uuid) {
		if (!databaseBackend.updateMessage(message, uuid)) {
            Log.e(Config.LOGTAG,"error updated message in DB after edit");
        }
		updateConversationUi();
	}

	protected void syncDirtyContacts(Account account) {
		for (Contact contact : account.getRoster().getContacts()) {
			if (contact.getOption(Contact.Options.DIRTY_PUSH)) {
				pushContactToServer(contact);
			}
			if (contact.getOption(Contact.Options.DIRTY_DELETE)) {
				deleteContactOnServer(contact);
			}
		}
	}

	public void createContact(Contact contact, boolean autoGrant) {
		if (autoGrant) {
			contact.setOption(Contact.Options.PREEMPTIVE_GRANT);
			contact.setOption(Contact.Options.ASKING);
		}
		pushContactToServer(contact);
	}

	public void pushContactToServer(final Contact contact) {
		contact.resetOption(Contact.Options.DIRTY_DELETE);
		contact.setOption(Contact.Options.DIRTY_PUSH);
		final Account account = contact.getAccount();
		if (account.getStatus() == Account.State.ONLINE) {
			final boolean ask = contact.getOption(Contact.Options.ASKING);
			final boolean sendUpdates = contact
					.getOption(Contact.Options.PENDING_SUBSCRIPTION_REQUEST)
					&& contact.getOption(Contact.Options.PREEMPTIVE_GRANT);
			final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
			iq.query(Namespace.ROSTER).addChild(contact.asElement());
			account.getXmppConnection().sendIqPacket(iq, mDefaultIqHandler);
			if (sendUpdates) {
				sendPresencePacket(account, mPresenceGenerator.sendPresenceUpdatesTo(contact));
			}
			if (ask) {
				sendPresencePacket(account, mPresenceGenerator.requestPresenceUpdatesFrom(contact));
			}
		} else {
			syncRoster(contact.getAccount());
		}
	}

	public void publishMucAvatar(final Conversation conversation, final Uri image, final OnAvatarPublication callback) {
		new Thread(() -> {
			final Bitmap.CompressFormat format = Config.AVATAR_FORMAT;
			final int size = Config.AVATAR_SIZE;
			final Avatar avatar = getFileBackend().getPepAvatar(image, size, format);
			if (avatar != null) {
				if (!getFileBackend().save(avatar)) {
					callback.onAvatarPublicationFailed(R.string.error_saving_avatar);
					return;
				}
				avatar.owner = conversation.getJid().asBareJid();
				publishMucAvatar(conversation, avatar, callback);
			} else {
				callback.onAvatarPublicationFailed(R.string.error_publish_avatar_converting);
			}
		}).start();
	}

	public void publishAvatar(final Account account, final Uri image, final OnAvatarPublication callback) {
		new Thread(() -> {
			final Bitmap.CompressFormat format = Config.AVATAR_FORMAT;
			final int size = Config.AVATAR_SIZE;
			final Avatar avatar = getFileBackend().getPepAvatar(image, size, format);
			if (avatar != null) {
				if (!getFileBackend().save(avatar)) {
					Log.d(Config.LOGTAG,"unable to save vcard");
					callback.onAvatarPublicationFailed(R.string.error_saving_avatar);
					return;
				}
				publishAvatar(account, avatar, callback);
			} else {
				callback.onAvatarPublicationFailed(R.string.error_publish_avatar_converting);
			}
		}).start();

	}

	private void publishMucAvatar(Conversation conversation, Avatar avatar, OnAvatarPublication callback) {
		final IqPacket retrieve = mIqGenerator.retrieveVcardAvatar(avatar);
		sendIqPacket(conversation.getAccount(), retrieve, (account, response) -> {
			boolean itemNotFound = response.getType() == IqPacket.TYPE.ERROR && response.hasChild("error") && response.findChild("error").hasChild("item-not-found");
			if (response.getType() == IqPacket.TYPE.RESULT || itemNotFound) {
				Element vcard = response.findChild("vCard", "vcard-temp");
				if (vcard == null) {
					vcard = new Element("vCard", "vcard-temp");
				}
				Element photo = vcard.findChild("PHOTO");
				if (photo == null) {
					photo = vcard.addChild("PHOTO");
				}
				photo.clearChildren();
				photo.addChild("TYPE").setContent(avatar.type);
				photo.addChild("BINVAL").setContent(avatar.image);
				IqPacket publication = new IqPacket(IqPacket.TYPE.SET);
				publication.setTo(conversation.getJid().asBareJid());
				publication.addChild(vcard);
				sendIqPacket(account, publication, (a1, publicationResponse) -> {
					if (publicationResponse.getType() == IqPacket.TYPE.RESULT) {
						callback.onAvatarPublicationSucceeded();
					} else {
						Log.d(Config.LOGTAG, "failed to publish vcard " + publicationResponse.getError());
						callback.onAvatarPublicationFailed(R.string.error_publish_avatar_server_reject);
					}
				});
			} else {
				Log.d(Config.LOGTAG, "failed to request vcard " + response.toString());
				callback.onAvatarPublicationFailed(R.string.error_publish_avatar_no_server_support);
			}
		});
	}

    public void publishAvatar(Account account, final Avatar avatar, final OnAvatarPublication callback) {
        final Bundle options;
        if (account.getXmppConnection().getFeatures().pepPublishOptions()) {
            options = PublishOptions.openAccess();
        } else {
            options = null;
        }
        publishAvatar(account, avatar, options, true, callback);
    }

	public void publishAvatar(Account account, final Avatar avatar, final Bundle options, final boolean retry, final OnAvatarPublication callback) {
        Log.d(Config.LOGTAG,account.getJid().asBareJid()+": publishing avatar. options="+options);
		IqPacket packet = this.mIqGenerator.publishAvatar(avatar, options);
		this.sendIqPacket(account, packet, new OnIqPacketReceived() {

			@Override
			public void onIqPacketReceived(Account account, IqPacket result) {
				if (result.getType() == IqPacket.TYPE.RESULT) {
                    publishAvatarMetadata(account, avatar, options,true, callback);
                } else if (retry && PublishOptions.preconditionNotMet(result)) {
				    pushNodeConfiguration(account, "urn:xmpp:avatar:data", options, new OnConfigurationPushed() {
                        @Override
                        public void onPushSucceeded() {
                            Log.d(Config.LOGTAG,account.getJid().asBareJid()+": changed node configuration for avatar node");
                            publishAvatar(account, avatar, options, false, callback);
                        }

                        @Override
                        public void onPushFailed() {
                            Log.d(Config.LOGTAG,account.getJid().asBareJid()+": unable to change node configuration for avatar node");
                            publishAvatar(account, avatar, null, false, callback);
                        }
                    });
				} else {
					Element error = result.findChild("error");
					Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server rejected avatar " + (avatar.size / 1024) + "KiB " + (error != null ? error.toString() : ""));
					if (callback != null) {
						callback.onAvatarPublicationFailed(R.string.error_publish_avatar_server_reject);
					}
				}
			}
		});
	}

	public void publishAvatarMetadata(Account account, final Avatar avatar, final Bundle options, final boolean retry, final OnAvatarPublication callback) {
        final IqPacket packet = XmppConnectionService.this.mIqGenerator.publishAvatarMetadata(avatar, options);
        sendIqPacket(account, packet, new OnIqPacketReceived() {
            @Override
            public void onIqPacketReceived(Account account, IqPacket result) {
                if (result.getType() == IqPacket.TYPE.RESULT) {
                    if (account.setAvatar(avatar.getFilename())) {
                        getAvatarService().clear(account);
                        databaseBackend.updateAccount(account);
                        notifyAccountAvatarHasChanged(account);
                    }
                    Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": published avatar " + (avatar.size / 1024) + "KiB");
                    if (callback != null) {
                        callback.onAvatarPublicationSucceeded();
                    }
                } else if (retry && PublishOptions.preconditionNotMet(result)) {
                    pushNodeConfiguration(account, "urn:xmpp:avatar:metadata", options, new OnConfigurationPushed() {
                        @Override
                        public void onPushSucceeded() {
                            Log.d(Config.LOGTAG,account.getJid().asBareJid()+": changed node configuration for avatar meta data node");
                            publishAvatarMetadata(account, avatar, options,false, callback);
                        }

                        @Override
                        public void onPushFailed() {
                            Log.d(Config.LOGTAG,account.getJid().asBareJid()+": unable to change node configuration for avatar meta data node");
                            publishAvatarMetadata(account, avatar,  null,false, callback);
                        }
                    });
                } else {
                    if (callback != null) {
                        callback.onAvatarPublicationFailed(R.string.error_publish_avatar_server_reject);
                    }
                }
            }
        });
    }

	public void republishAvatarIfNeeded(Account account) {
		if (account.getAxolotlService().isPepBroken()) {
			Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": skipping republication of avatar because pep is broken");
			return;
		}
		IqPacket packet = this.mIqGenerator.retrieveAvatarMetaData(null);
		this.sendIqPacket(account, packet, new OnIqPacketReceived() {

			private Avatar parseAvatar(IqPacket packet) {
				Element pubsub = packet.findChild("pubsub", "http://jabber.org/protocol/pubsub");
				if (pubsub != null) {
					Element items = pubsub.findChild("items");
					if (items != null) {
						return Avatar.parseMetadata(items);
					}
				}
				return null;
			}

			private boolean errorIsItemNotFound(IqPacket packet) {
				Element error = packet.findChild("error");
				return packet.getType() == IqPacket.TYPE.ERROR
						&& error != null
						&& error.hasChild("item-not-found");
			}

			@Override
			public void onIqPacketReceived(Account account, IqPacket packet) {
				if (packet.getType() == IqPacket.TYPE.RESULT || errorIsItemNotFound(packet)) {
					Avatar serverAvatar = parseAvatar(packet);
					if (serverAvatar == null && account.getAvatar() != null) {
						Avatar avatar = fileBackend.getStoredPepAvatar(account.getAvatar());
						if (avatar != null) {
							Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": avatar on server was null. republishing");
							publishAvatar(account, fileBackend.getStoredPepAvatar(account.getAvatar()), null);
						} else {
							Log.e(Config.LOGTAG, account.getJid().asBareJid() + ": error rereading avatar");
						}
					}
				}
			}
		});
	}

	public void fetchAvatar(Account account, Avatar avatar) {
		fetchAvatar(account, avatar, null);
	}

	public void fetchAvatar(Account account, final Avatar avatar, final UiCallback<Avatar> callback) {
		final String KEY = generateFetchKey(account, avatar);
		synchronized (this.mInProgressAvatarFetches) {
		    if (mInProgressAvatarFetches.add(KEY)) {
                switch (avatar.origin) {
                    case PEP:
                        this.mInProgressAvatarFetches.add(KEY);
                        fetchAvatarPep(account, avatar, callback);
                        break;
                    case VCARD:
                        this.mInProgressAvatarFetches.add(KEY);
                        fetchAvatarVcard(account, avatar, callback);
                        break;
                }
            } else if (avatar.origin == Avatar.Origin.PEP) {
		        mOmittedPepAvatarFetches.add(KEY);
            } else {
		        Log.d(Config.LOGTAG,account.getJid().asBareJid()+": already fetching "+avatar.origin+" avatar for "+avatar.owner);
            }
		}
	}

	private void fetchAvatarPep(Account account, final Avatar avatar, final UiCallback<Avatar> callback) {
		IqPacket packet = this.mIqGenerator.retrievePepAvatar(avatar);
		sendIqPacket(account, packet, (a, result) -> {
			synchronized (mInProgressAvatarFetches) {
				mInProgressAvatarFetches.remove(generateFetchKey(a, avatar));
			}
			final String ERROR = a.getJid().asBareJid() + ": fetching avatar for " + avatar.owner + " failed ";
			if (result.getType() == IqPacket.TYPE.RESULT) {
				avatar.image = mIqParser.avatarData(result);
				if (avatar.image != null) {
					if (getFileBackend().save(avatar)) {
						if (a.getJid().asBareJid().equals(avatar.owner)) {
							if (a.setAvatar(avatar.getFilename())) {
								databaseBackend.updateAccount(a);
							}
							getAvatarService().clear(a);
							updateConversationUi();
							updateAccountUi();
						} else {
							Contact contact = a.getRoster().getContact(avatar.owner);
							if (contact.setAvatar(avatar)) {
								syncRoster(account);
								getAvatarService().clear(contact);
								updateConversationUi();
								updateRosterUi();
							}
						}
						if (callback != null) {
							callback.success(avatar);
						}
						Log.d(Config.LOGTAG, a.getJid().asBareJid()
								+ ": successfully fetched pep avatar for " + avatar.owner);
						return;
					}
				} else {

					Log.d(Config.LOGTAG, ERROR + "(parsing error)");
				}
			} else {
				Element error = result.findChild("error");
				if (error == null) {
					Log.d(Config.LOGTAG, ERROR + "(server error)");
				} else {
					Log.d(Config.LOGTAG, ERROR + error.toString());
				}
			}
			if (callback != null) {
				callback.error(0, null);
			}

		});
	}

	private void fetchAvatarVcard(final Account account, final Avatar avatar, final UiCallback<Avatar> callback) {
		IqPacket packet = this.mIqGenerator.retrieveVcardAvatar(avatar);
		this.sendIqPacket(account, packet, new OnIqPacketReceived() {
			@Override
			public void onIqPacketReceived(Account account, IqPacket packet) {
			    final boolean previouslyOmittedPepFetch;
				synchronized (mInProgressAvatarFetches) {
				    final String KEY = generateFetchKey(account, avatar);
					mInProgressAvatarFetches.remove(KEY);
					previouslyOmittedPepFetch = mOmittedPepAvatarFetches.remove(KEY);
				}
				if (packet.getType() == IqPacket.TYPE.RESULT) {
					Element vCard = packet.findChild("vCard", "vcard-temp");
					Element photo = vCard != null ? vCard.findChild("PHOTO") : null;
					String image = photo != null ? photo.findChildContent("BINVAL") : null;
					if (image != null) {
						avatar.image = image;
						if (getFileBackend().save(avatar)) {
							Log.d(Config.LOGTAG, account.getJid().asBareJid()
									+ ": successfully fetched vCard avatar for " + avatar.owner+" omittedPep="+previouslyOmittedPepFetch);
							if (avatar.owner.isBareJid()) {
								if (account.getJid().asBareJid().equals(avatar.owner) && account.getAvatar() == null) {
									Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": had no avatar. replacing with vcard");
									account.setAvatar(avatar.getFilename());
									databaseBackend.updateAccount(account);
									getAvatarService().clear(account);
									updateAccountUi();
								} else {
									Contact contact = account.getRoster().getContact(avatar.owner);
									if (contact.setAvatar(avatar, previouslyOmittedPepFetch)) {
										syncRoster(account);
										getAvatarService().clear(contact);
										updateRosterUi();
									}
								}
								updateConversationUi();
							} else {
								Conversation conversation = find(account, avatar.owner.asBareJid());
								if (conversation != null && conversation.getMode() == Conversation.MODE_MULTI) {
									MucOptions.User user = conversation.getMucOptions().findUserByFullJid(avatar.owner);
									if (user != null) {
										if (user.setAvatar(avatar)) {
											getAvatarService().clear(user);
											updateConversationUi();
											updateMucRosterUi();
										}
										if (user.getRealJid() != null) {
										    Contact contact = account.getRoster().getContact(user.getRealJid());
										    if (contact.setAvatar(avatar)) {
                                                syncRoster(account);
                                                getAvatarService().clear(contact);
                                                updateRosterUi();
                                            }
                                        }
									}
								}
							}
						}
					}
				}
			}
		});
	}

	public void checkForAvatar(Account account, final UiCallback<Avatar> callback) {
		IqPacket packet = this.mIqGenerator.retrieveAvatarMetaData(null);
		this.sendIqPacket(account, packet, new OnIqPacketReceived() {

			@Override
			public void onIqPacketReceived(Account account, IqPacket packet) {
				if (packet.getType() == IqPacket.TYPE.RESULT) {
					Element pubsub = packet.findChild("pubsub", "http://jabber.org/protocol/pubsub");
					if (pubsub != null) {
						Element items = pubsub.findChild("items");
						if (items != null) {
							Avatar avatar = Avatar.parseMetadata(items);
							if (avatar != null) {
								avatar.owner = account.getJid().asBareJid();
								if (fileBackend.isAvatarCached(avatar)) {
									if (account.setAvatar(avatar.getFilename())) {
										databaseBackend.updateAccount(account);
									}
									getAvatarService().clear(account);
									callback.success(avatar);
								} else {
									fetchAvatarPep(account, avatar, callback);
								}
								return;
							}
						}
					}
				}
				callback.error(0, null);
			}
		});
	}

	public void notifyAccountAvatarHasChanged(final Account account) {
	    final XmppConnection connection = account.getXmppConnection();
	    if (connection != null && connection.getFeatures().bookmarksConversion()) {
            Log.d(Config.LOGTAG,account.getJid().asBareJid()+": avatar changed. resending presence to online group chats");
            for(Conversation conversation : conversations) {
                if (conversation.getAccount() == account && conversation.getMode() == Conversational.MODE_MULTI) {
                    final MucOptions mucOptions = conversation.getMucOptions();
                    if (mucOptions.online()) {
                        PresencePacket packet = mPresenceGenerator.selfPresence(account, Presence.Status.ONLINE, mucOptions.nonanonymous());
                        packet.setTo(mucOptions.getSelf().getFullJid());
                        connection.sendPresencePacket(packet);
                    }
                }
            }
        }
    }

	public void deleteContactOnServer(Contact contact) {
		contact.resetOption(Contact.Options.PREEMPTIVE_GRANT);
		contact.resetOption(Contact.Options.DIRTY_PUSH);
		contact.setOption(Contact.Options.DIRTY_DELETE);
		Account account = contact.getAccount();
		if (account.getStatus() == Account.State.ONLINE) {
			IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
			Element item = iq.query(Namespace.ROSTER).addChild("item");
			item.setAttribute("jid", contact.getJid().toString());
			item.setAttribute("subscription", "remove");
			account.getXmppConnection().sendIqPacket(iq, mDefaultIqHandler);
		}
	}

	public void updateConversation(final Conversation conversation) {
		mDatabaseWriterExecutor.execute(() -> databaseBackend.updateConversation(conversation));
	}

	private void reconnectAccount(final Account account, final boolean force, final boolean interactive) {
		synchronized (account) {
			XmppConnection connection = account.getXmppConnection();
			if (connection == null) {
				connection = createConnection(account);
				account.setXmppConnection(connection);
			}
			boolean hasInternet = hasInternetConnection();
			if (account.isEnabled() && hasInternet) {
				if (!force) {
					disconnect(account, false);
				}
				Thread thread = new Thread(connection);
				connection.setInteractive(interactive);
				connection.prepareNewConnection();
				connection.interrupt();
				thread.start();
				scheduleWakeUpCall(Config.CONNECT_DISCO_TIMEOUT, account.getUuid().hashCode());
			} else {
				disconnect(account, force || account.getTrueStatus().isError() || !hasInternet);
				account.getRoster().clearPresences();
				connection.resetEverything();
				final AxolotlService axolotlService = account.getAxolotlService();
				if (axolotlService != null) {
					axolotlService.resetBrokenness();
				}
				if (!hasInternet) {
					account.setStatus(Account.State.NO_INTERNET);
				}
			}
		}
	}

	public void reconnectAccountInBackground(final Account account) {
		new Thread(() -> reconnectAccount(account, false, true)).start();
	}

	public void invite(Conversation conversation, Jid contact) {
		Log.d(Config.LOGTAG, conversation.getAccount().getJid().asBareJid() + ": inviting " + contact + " to " + conversation.getJid().asBareJid());
		MessagePacket packet = mMessageGenerator.invite(conversation, contact);
		sendMessagePacket(conversation.getAccount(), packet);
	}

	public void directInvite(Conversation conversation, Jid jid) {
		MessagePacket packet = mMessageGenerator.directInvite(conversation, jid);
		sendMessagePacket(conversation.getAccount(), packet);
	}

	public void resetSendingToWaiting(Account account) {
		for (Conversation conversation : getConversations()) {
			if (conversation.getAccount() == account) {
				conversation.findUnsentTextMessages(message -> markMessage(message, Message.STATUS_WAITING));
			}
		}
	}

	public Message markMessage(final Account account, final Jid recipient, final String uuid, final int status) {
		return markMessage(account, recipient, uuid, status, null);
	}

	public Message markMessage(final Account account, final Jid recipient, final String uuid, final int status, String errorMessage) {
		if (uuid == null) {
			return null;
		}
		for (Conversation conversation : getConversations()) {
			if (conversation.getJid().asBareJid().equals(recipient) && conversation.getAccount() == account) {
				final Message message = conversation.findSentMessageWithUuidOrRemoteId(uuid);
				if (message != null) {
					markMessage(message, status, errorMessage);
				}
				return message;
			}
		}
		return null;
	}

	public boolean markMessage(Conversation conversation, String uuid, int status, String serverMessageId) {
		if (uuid == null) {
			return false;
		} else {
			Message message = conversation.findSentMessageWithUuid(uuid);
			if (message != null) {
				if (message.getServerMsgId() == null) {
					message.setServerMsgId(serverMessageId);
				}
				markMessage(message, status);
				return true;
			} else {
				return false;
			}
		}
	}

	public void markMessage(Message message, int status) {
		markMessage(message, status, null);
	}


	public void markMessage(Message message, int status, String errorMessage) {
		final int c = message.getStatus();
		if (status == Message.STATUS_SEND_FAILED && (c == Message.STATUS_SEND_RECEIVED || c == Message.STATUS_SEND_DISPLAYED)) {
			return;
		}
		if (status == Message.STATUS_SEND_RECEIVED && c == Message.STATUS_SEND_DISPLAYED) {
			return;
		}
		message.setErrorMessage(errorMessage);
		message.setStatus(status);
		databaseBackend.updateMessage(message, false);
		updateConversationUi();
	}

	private SharedPreferences getPreferences() {
		return PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
	}

	public long getAutomaticMessageDeletionDate() {
		final long timeout = getLongPreference(SettingsActivity.AUTOMATIC_MESSAGE_DELETION, R.integer.automatic_message_deletion);
		return timeout == 0 ? timeout : (System.currentTimeMillis() - (timeout * 1000));
	}

	public long getLongPreference(String name, @IntegerRes int res) {
		long defaultValue = getResources().getInteger(res);
		try {
			return Long.parseLong(getPreferences().getString(name, String.valueOf(defaultValue)));
		} catch (NumberFormatException e) {
			return defaultValue;
		}
	}

	public boolean getBooleanPreference(String name, @BoolRes int res) {
		return getPreferences().getBoolean(name, getResources().getBoolean(res));
	}

	public boolean confirmMessages() {
		return getBooleanPreference("confirm_messages", R.bool.confirm_messages);
	}

	public boolean allowMessageCorrection() {
		return getBooleanPreference("allow_message_correction", R.bool.allow_message_correction);
	}

	public boolean sendChatStates() {
		return getBooleanPreference("chat_states", R.bool.chat_states);
	}

	private boolean synchronizeWithBookmarks() {
		return getBooleanPreference("autojoin", R.bool.autojoin);
	}

	public boolean indicateReceived() {
		return getBooleanPreference("indicate_received", R.bool.indicate_received);
	}

	public boolean useTorToConnect() {
		return QuickConversationsService.isConversations() && getBooleanPreference("use_tor", R.bool.use_tor);
	}

	public boolean showExtendedConnectionOptions() {
		return QuickConversationsService.isConversations() && getBooleanPreference("show_connection_options", R.bool.show_connection_options);
	}

	public boolean broadcastLastActivity() {
		return getBooleanPreference(SettingsActivity.BROADCAST_LAST_ACTIVITY, R.bool.last_activity);
	}

	public int unreadCount() {
		int count = 0;
		for (Conversation conversation : getConversations()) {
			count += conversation.unreadCount();
		}
		return count;
	}


	private <T> List<T> threadSafeList(Set<T> set) {
		synchronized (LISTENER_LOCK) {
			return set.size() == 0 ? Collections.emptyList() : new ArrayList<>(set);
		}
	}

	public void showErrorToastInUi(int resId) {
		for (OnShowErrorToast listener : threadSafeList(this.mOnShowErrorToasts)) {
			listener.onShowErrorToast(resId);
		}
	}

	public void updateConversationUi() {
		for (OnConversationUpdate listener : threadSafeList(this.mOnConversationUpdates)) {
			listener.onConversationUpdate();
		}
	}

	public void updateAccountUi() {
		for (OnAccountUpdate listener : threadSafeList(this.mOnAccountUpdates)) {
			listener.onAccountUpdate();
		}
	}

	public void updateRosterUi() {
		for (OnRosterUpdate listener : threadSafeList(this.mOnRosterUpdates)) {
			listener.onRosterUpdate();
		}
	}

	public boolean displayCaptchaRequest(Account account, String id, Data data, Bitmap captcha) {
		if (mOnCaptchaRequested.size() > 0) {
			DisplayMetrics metrics = getApplicationContext().getResources().getDisplayMetrics();
			Bitmap scaled = Bitmap.createScaledBitmap(captcha, (int) (captcha.getWidth() * metrics.scaledDensity),
					(int) (captcha.getHeight() * metrics.scaledDensity), false);
			for (OnCaptchaRequested listener : threadSafeList(this.mOnCaptchaRequested)) {
				listener.onCaptchaRequested(account, id, data, scaled);
			}
			return true;
		}
		return false;
	}

	public void updateBlocklistUi(final OnUpdateBlocklist.Status status) {
		for (OnUpdateBlocklist listener : threadSafeList(this.mOnUpdateBlocklist)) {
			listener.OnUpdateBlocklist(status);
		}
	}

	public void updateMucRosterUi() {
		for (OnMucRosterUpdate listener : threadSafeList(this.mOnMucRosterUpdate)) {
			listener.onMucRosterUpdate();
		}
	}

	public void keyStatusUpdated(AxolotlService.FetchStatus report) {
		for (OnKeyStatusUpdated listener : threadSafeList(this.mOnKeyStatusUpdated)) {
			listener.onKeyStatusUpdated(report);
		}
	}

	public Account findAccountByJid(final Jid accountJid) {
		for (Account account : this.accounts) {
			if (account.getJid().asBareJid().equals(accountJid.asBareJid())) {
				return account;
			}
		}
		return null;
	}

	public Account findAccountByUuid(final String uuid) {
		for(Account account : this.accounts) {
			if (account.getUuid().equals(uuid)) {
				return account;
			}
		}
		return null;
	}

	public Conversation findConversationByUuid(String uuid) {
		for (Conversation conversation : getConversations()) {
			if (conversation.getUuid().equals(uuid)) {
				return conversation;
			}
		}
		return null;
	}

	public Conversation findUniqueConversationByJid(XmppUri xmppUri) {
		List<Conversation> findings = new ArrayList<>();
		for (Conversation c : getConversations()) {
			if (c.getAccount().isEnabled() && c.getJid().asBareJid().equals(xmppUri.getJid()) && ((c.getMode() == Conversational.MODE_MULTI) == xmppUri.isAction(XmppUri.ACTION_JOIN))) {
				findings.add(c);
			}
		}
		return findings.size() == 1 ? findings.get(0) : null;
	}

	public boolean markRead(final Conversation conversation, boolean dismiss) {
		return markRead(conversation, null, dismiss).size() > 0;
	}

	public void markRead(final Conversation conversation) {
		markRead(conversation, null, true);
	}

	public List<Message> markRead(final Conversation conversation, String upToUuid, boolean dismiss) {
		if (dismiss) {
			mNotificationService.clear(conversation);
		}
		final List<Message> readMessages = conversation.markRead(upToUuid);
		if (readMessages.size() > 0) {
			Runnable runnable = () -> {
				for (Message message : readMessages) {
					databaseBackend.updateMessage(message, false);
				}
			};
			mDatabaseWriterExecutor.execute(runnable);
			updateUnreadCountBadge();
			return readMessages;
		} else {
			return readMessages;
		}
	}

	public synchronized void updateUnreadCountBadge() {
		int count = unreadCount();
		if (unreadCount != count) {
			Log.d(Config.LOGTAG, "update unread count to " + count);
			if (count > 0) {
				ShortcutBadger.applyCount(getApplicationContext(), count);
			} else {
				ShortcutBadger.removeCount(getApplicationContext());
			}
			unreadCount = count;
		}
	}

	public void sendReadMarker(final Conversation conversation, String upToUuid) {
		final boolean isPrivateAndNonAnonymousMuc = conversation.getMode() == Conversation.MODE_MULTI && conversation.isPrivateAndNonAnonymous();
		final List<Message> readMessages = this.markRead(conversation, upToUuid, true);
		if (readMessages.size() > 0) {
			updateConversationUi();
		}
		final Message markable = Conversation.getLatestMarkableMessage(readMessages, isPrivateAndNonAnonymousMuc);
		if (confirmMessages()
				&& markable != null
				&& (markable.trusted() || isPrivateAndNonAnonymousMuc)
				&& markable.getRemoteMsgId() != null) {
			Log.d(Config.LOGTAG, conversation.getAccount().getJid().asBareJid() + ": sending read marker to " + markable.getCounterpart().toString());
			Account account = conversation.getAccount();
			final Jid to = markable.getCounterpart();
			final boolean groupChat = conversation.getMode() == Conversation.MODE_MULTI;
			MessagePacket packet = mMessageGenerator.confirm(account, to, markable.getRemoteMsgId(), markable.getCounterpart(), groupChat);
			this.sendMessagePacket(conversation.getAccount(), packet);
		}
	}

	public SecureRandom getRNG() {
		return this.mRandom;
	}

	public MemorizingTrustManager getMemorizingTrustManager() {
		return this.mMemorizingTrustManager;
	}

	public void setMemorizingTrustManager(MemorizingTrustManager trustManager) {
		this.mMemorizingTrustManager = trustManager;
	}

	public void updateMemorizingTrustmanager() {
		final MemorizingTrustManager tm;
		final boolean dontTrustSystemCAs = getBooleanPreference("dont_trust_system_cas", R.bool.dont_trust_system_cas);
		if (dontTrustSystemCAs) {
			tm = new MemorizingTrustManager(getApplicationContext(), null);
		} else {
			tm = new MemorizingTrustManager(getApplicationContext());
		}
		setMemorizingTrustManager(tm);
	}

	public LruCache<String, Bitmap> getBitmapCache() {
		return this.mBitmapCache;
	}

	public Collection<String> getKnownHosts() {
		final Set<String> hosts = new HashSet<>();
		for (final Account account : getAccounts()) {
			hosts.add(account.getServer());
			for (final Contact contact : account.getRoster().getContacts()) {
				if (contact.showInRoster()) {
					final String server = contact.getServer();
					if (server != null) {
						hosts.add(server);
					}
				}
			}
		}
		if (Config.QUICKSY_DOMAIN != null) {
		    hosts.remove(Config.QUICKSY_DOMAIN); //we only want to show this when we type a e164 number
        }
		if (Config.DOMAIN_LOCK != null) {
			hosts.add(Config.DOMAIN_LOCK);
		}
		if (Config.MAGIC_CREATE_DOMAIN != null) {
			hosts.add(Config.MAGIC_CREATE_DOMAIN);
		}
		return hosts;
	}

	public Collection<String> getKnownConferenceHosts() {
		final Set<String> mucServers = new HashSet<>();
		for (final Account account : accounts) {
			if (account.getXmppConnection() != null) {
				mucServers.addAll(account.getXmppConnection().getMucServers());
				for (Bookmark bookmark : account.getBookmarks()) {
					final Jid jid = bookmark.getJid();
					final String s = jid == null ? null : jid.getDomain();
					if (s != null) {
						mucServers.add(s);
					}
				}
			}
		}
		return mucServers;
	}

	public void sendMessagePacket(Account account, MessagePacket packet) {
		XmppConnection connection = account.getXmppConnection();
		if (connection != null) {
			connection.sendMessagePacket(packet);
		}
	}

	public void sendPresencePacket(Account account, PresencePacket packet) {
		XmppConnection connection = account.getXmppConnection();
		if (connection != null) {
			connection.sendPresencePacket(packet);
		}
	}

	public void sendCreateAccountWithCaptchaPacket(Account account, String id, Data data) {
		final XmppConnection connection = account.getXmppConnection();
		if (connection != null) {
			IqPacket request = mIqGenerator.generateCreateAccountWithCaptcha(account, id, data);
			connection.sendUnmodifiedIqPacket(request, connection.registrationResponseListener, true);
		}
	}

	public void sendIqPacket(final Account account, final IqPacket packet, final OnIqPacketReceived callback) {
		final XmppConnection connection = account.getXmppConnection();
		if (connection != null) {
			connection.sendIqPacket(packet, callback);
		} else if (callback != null) {
		    callback.onIqPacketReceived(account,new IqPacket(IqPacket.TYPE.TIMEOUT));
        }
	}

	public void sendPresence(final Account account) {
		sendPresence(account, checkListeners() && broadcastLastActivity());
	}

	private void sendPresence(final Account account, final boolean includeIdleTimestamp) {
		Presence.Status status;
		if (manuallyChangePresence()) {
			status = account.getPresenceStatus();
		} else {
			status = getTargetPresence();
		}
		PresencePacket packet = mPresenceGenerator.selfPresence(account, status);
		String message = account.getPresenceStatusMessage();
		if (message != null && !message.isEmpty()) {
			packet.addChild(new Element("status").setContent(message));
		}
		if (mLastActivity > 0 && includeIdleTimestamp) {
			long since = Math.min(mLastActivity, System.currentTimeMillis()); //don't send future dates
			packet.addChild("idle", Namespace.IDLE).setAttribute("since", AbstractGenerator.getTimestamp(since));
		}
		sendPresencePacket(account, packet);
	}

	private void deactivateGracePeriod() {
		for (Account account : getAccounts()) {
			account.deactivateGracePeriod();
		}
	}

	public void refreshAllPresences() {
		boolean includeIdleTimestamp = checkListeners() && broadcastLastActivity();
		for (Account account : getAccounts()) {
			if (account.isEnabled()) {
				sendPresence(account, includeIdleTimestamp);
			}
		}
	}

	private void refreshAllFcmTokens() {
		for (Account account : getAccounts()) {
			if (account.isOnlineAndConnected() && mPushManagementService.available(account)) {
				mPushManagementService.registerPushTokenOnServer(account);
			}
		}
	}

	private void sendOfflinePresence(final Account account) {
		Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": sending offline presence");
		sendPresencePacket(account, mPresenceGenerator.sendOfflinePresence(account));
	}

	public MessageGenerator getMessageGenerator() {
		return this.mMessageGenerator;
	}

	public PresenceGenerator getPresenceGenerator() {
		return this.mPresenceGenerator;
	}

	public IqGenerator getIqGenerator() {
		return this.mIqGenerator;
	}

	public IqParser getIqParser() {
		return this.mIqParser;
	}

	public JingleConnectionManager getJingleConnectionManager() {
		return this.mJingleConnectionManager;
	}

	public MessageArchiveService getMessageArchiveService() {
		return this.mMessageArchiveService;
	}

	public QuickConversationsService getQuickConversationsService() {
        return this.mQuickConversationsService;
    }

	public List<Contact> findContacts(Jid jid, String accountJid) {
		ArrayList<Contact> contacts = new ArrayList<>();
		for (Account account : getAccounts()) {
			if ((account.isEnabled() || accountJid != null)
					&& (accountJid == null || accountJid.equals(account.getJid().asBareJid().toString()))) {
				Contact contact = account.getRoster().getContactFromContactList(jid);
				if (contact != null) {
					contacts.add(contact);
				}
			}
		}
		return contacts;
	}

	public Conversation findFirstMuc(Jid jid) {
		for (Conversation conversation : getConversations()) {
			if (conversation.getAccount().isEnabled() && conversation.getJid().asBareJid().equals(jid.asBareJid()) && conversation.getMode() == Conversation.MODE_MULTI) {
				return conversation;
			}
		}
		return null;
	}

	public NotificationService getNotificationService() {
		return this.mNotificationService;
	}

	public HttpConnectionManager getHttpConnectionManager() {
		return this.mHttpConnectionManager;
	}

	public void resendFailedMessages(final Message message) {
		final Collection<Message> messages = new ArrayList<>();
		Message current = message;
		while (current.getStatus() == Message.STATUS_SEND_FAILED) {
			messages.add(current);
			if (current.mergeable(current.next())) {
				current = current.next();
			} else {
				break;
			}
		}
		for (final Message msg : messages) {
			msg.setTime(System.currentTimeMillis());
			markMessage(msg, Message.STATUS_WAITING);
			this.resendMessage(msg, false);
		}
		if (message.getConversation() instanceof Conversation) {
			((Conversation) message.getConversation()).sort();
		}
		updateConversationUi();
	}

	public void clearConversationHistory(final Conversation conversation) {
		final long clearDate;
		final String reference;
		if (conversation.countMessages() > 0) {
			Message latestMessage = conversation.getLatestMessage();
			clearDate = latestMessage.getTimeSent() + 1000;
			reference = latestMessage.getServerMsgId();
		} else {
			clearDate = System.currentTimeMillis();
			reference = null;
		}
		conversation.clearMessages();
		conversation.setHasMessagesLeftOnServer(false); //avoid messages getting loaded through mam
		conversation.setLastClearHistory(clearDate, reference);
		Runnable runnable = () -> {
			databaseBackend.deleteMessagesInConversation(conversation);
			databaseBackend.updateConversation(conversation);
		};
		mDatabaseWriterExecutor.execute(runnable);
	}

	public boolean sendBlockRequest(final Blockable blockable, boolean reportSpam) {
		if (blockable != null && blockable.getBlockedJid() != null) {
			final Jid jid = blockable.getBlockedJid();
			this.sendIqPacket(blockable.getAccount(), getIqGenerator().generateSetBlockRequest(jid, reportSpam), new OnIqPacketReceived() {

				@Override
				public void onIqPacketReceived(final Account account, final IqPacket packet) {
					if (packet.getType() == IqPacket.TYPE.RESULT) {
						account.getBlocklist().add(jid);
						updateBlocklistUi(OnUpdateBlocklist.Status.BLOCKED);
					}
				}
			});
			if (removeBlockedConversations(blockable.getAccount(), jid)) {
				updateConversationUi();
				return true;
			} else {
				return false;
			}
		} else {
			return false;
		}
	}

	public boolean removeBlockedConversations(final Account account, final Jid blockedJid) {
		boolean removed = false;
		synchronized (this.conversations) {
			boolean domainJid = blockedJid.getLocal() == null;
			for (Conversation conversation : this.conversations) {
				boolean jidMatches = (domainJid && blockedJid.getDomain().equals(conversation.getJid().getDomain()))
						|| blockedJid.equals(conversation.getJid().asBareJid());
				if (conversation.getAccount() == account
						&& conversation.getMode() == Conversation.MODE_SINGLE
						&& jidMatches) {
					this.conversations.remove(conversation);
					markRead(conversation);
					conversation.setStatus(Conversation.STATUS_ARCHIVED);
					Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": archiving conversation " + conversation.getJid().asBareJid() + " because jid was blocked");
					updateConversation(conversation);
					removed = true;
				}
			}
		}
		return removed;
	}

	public void sendUnblockRequest(final Blockable blockable) {
		if (blockable != null && blockable.getJid() != null) {
			final Jid jid = blockable.getBlockedJid();
			this.sendIqPacket(blockable.getAccount(), getIqGenerator().generateSetUnblockRequest(jid), new OnIqPacketReceived() {
				@Override
				public void onIqPacketReceived(final Account account, final IqPacket packet) {
					if (packet.getType() == IqPacket.TYPE.RESULT) {
						account.getBlocklist().remove(jid);
						updateBlocklistUi(OnUpdateBlocklist.Status.UNBLOCKED);
					}
				}
			});
		}
	}

	public void publishDisplayName(Account account) {
		String displayName = account.getDisplayName();
		final IqPacket request;
		if (TextUtils.isEmpty(displayName)) {
            request = mIqGenerator.deleteNode(Namespace.NICK);
		} else {
            request = mIqGenerator.publishNick(displayName);
        }
        mAvatarService.clear(account);
        sendIqPacket(account, request, (account1, packet) -> {
            if (packet.getType() == IqPacket.TYPE.ERROR) {
                Log.d(Config.LOGTAG, account1.getJid().asBareJid() + ": unable to modify nick name "+packet.toString());
            }
        });
	}

	public ServiceDiscoveryResult getCachedServiceDiscoveryResult(Pair<String, String> key) {
		ServiceDiscoveryResult result = discoCache.get(key);
		if (result != null) {
			return result;
		} else {
			result = databaseBackend.findDiscoveryResult(key.first, key.second);
			if (result != null) {
				discoCache.put(key, result);
			}
			return result;
		}
	}

	public void fetchCaps(Account account, final Jid jid, final Presence presence) {
		final Pair<String, String> key = new Pair<>(presence.getHash(), presence.getVer());
		ServiceDiscoveryResult disco = getCachedServiceDiscoveryResult(key);
		if (disco != null) {
			presence.setServiceDiscoveryResult(disco);
		} else {
			if (!account.inProgressDiscoFetches.contains(key)) {
				account.inProgressDiscoFetches.add(key);
				IqPacket request = new IqPacket(IqPacket.TYPE.GET);
				request.setTo(jid);
				final String node = presence.getNode();
				final String ver = presence.getVer();
				final Element query = request.query("http://jabber.org/protocol/disco#info");
				if (node != null && ver != null) {
					query.setAttribute("node",node+"#"+ver);
				}
				Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": making disco request for " + key.second + " to " + jid);
				sendIqPacket(account, request, (a, response) -> {
					if (response.getType() == IqPacket.TYPE.RESULT) {
						ServiceDiscoveryResult discoveryResult = new ServiceDiscoveryResult(response);
						if (presence.getVer().equals(discoveryResult.getVer())) {
							databaseBackend.insertDiscoveryResult(discoveryResult);
							injectServiceDiscoveryResult(a.getRoster(), presence.getHash(), presence.getVer(), discoveryResult);
						} else {
							Log.d(Config.LOGTAG, a.getJid().asBareJid() + ": mismatch in caps for contact " + jid + " " + presence.getVer() + " vs " + discoveryResult.getVer());
						}
					}
					a.inProgressDiscoFetches.remove(key);
				});
			}
		}
	}

	private void injectServiceDiscoveryResult(Roster roster, String hash, String ver, ServiceDiscoveryResult disco) {
		for (Contact contact : roster.getContacts()) {
			for (Presence presence : contact.getPresences().getPresences().values()) {
				if (hash.equals(presence.getHash()) && ver.equals(presence.getVer())) {
					presence.setServiceDiscoveryResult(disco);
				}
			}
		}
	}

	public void fetchMamPreferences(Account account, final OnMamPreferencesFetched callback) {
		final MessageArchiveService.Version version = MessageArchiveService.Version.get(account);
		IqPacket request = new IqPacket(IqPacket.TYPE.GET);
		request.addChild("prefs", version.namespace);
		sendIqPacket(account, request, (account1, packet) -> {
			Element prefs = packet.findChild("prefs", version.namespace);
			if (packet.getType() == IqPacket.TYPE.RESULT && prefs != null) {
				callback.onPreferencesFetched(prefs);
			} else {
				callback.onPreferencesFetchFailed();
			}
		});
	}

	public PushManagementService getPushManagementService() {
		return mPushManagementService;
	}

	public void changeStatus(Account account, PresenceTemplate template, String signature) {
		if (!template.getStatusMessage().isEmpty()) {
			databaseBackend.insertPresenceTemplate(template);
		}
		account.setPgpSignature(signature);
		account.setPresenceStatus(template.getStatus());
		account.setPresenceStatusMessage(template.getStatusMessage());
		databaseBackend.updateAccount(account);
		sendPresence(account);
	}

	public List<PresenceTemplate> getPresenceTemplates(Account account) {
		List<PresenceTemplate> templates = databaseBackend.getPresenceTemplates();
		for (PresenceTemplate template : account.getSelfContact().getPresences().asTemplates()) {
			if (!templates.contains(template)) {
				templates.add(0, template);
			}
		}
		return templates;
	}

	public void saveConversationAsBookmark(Conversation conversation, String name) {
		Account account = conversation.getAccount();
		Bookmark bookmark = new Bookmark(account, conversation.getJid().asBareJid());
		if (!conversation.getJid().isBareJid()) {
			bookmark.setNick(conversation.getJid().getResource());
		}
		if (!TextUtils.isEmpty(name)) {
			bookmark.setBookmarkName(name);
		}
		bookmark.setAutojoin(getPreferences().getBoolean("autojoin", getResources().getBoolean(R.bool.autojoin)));
		account.getBookmarks().add(bookmark);
		pushBookmarks(account);
		bookmark.setConversation(conversation);
	}

	public boolean verifyFingerprints(Contact contact, List<XmppUri.Fingerprint> fingerprints) {
		boolean performedVerification = false;
		final AxolotlService axolotlService = contact.getAccount().getAxolotlService();
		for (XmppUri.Fingerprint fp : fingerprints) {
			if (fp.type == XmppUri.FingerprintType.OMEMO) {
				String fingerprint = "05" + fp.fingerprint.replaceAll("\\s", "");
				FingerprintStatus fingerprintStatus = axolotlService.getFingerprintTrust(fingerprint);
				if (fingerprintStatus != null) {
					if (!fingerprintStatus.isVerified()) {
						performedVerification = true;
						axolotlService.setFingerprintTrust(fingerprint, fingerprintStatus.toVerified());
					}
				} else {
					axolotlService.preVerifyFingerprint(contact, fingerprint);
				}
			}
		}
		return performedVerification;
	}

	public boolean verifyFingerprints(Account account, List<XmppUri.Fingerprint> fingerprints) {
		final AxolotlService axolotlService = account.getAxolotlService();
		boolean verifiedSomething = false;
		for (XmppUri.Fingerprint fp : fingerprints) {
			if (fp.type == XmppUri.FingerprintType.OMEMO) {
				String fingerprint = "05" + fp.fingerprint.replaceAll("\\s", "");
				Log.d(Config.LOGTAG, "trying to verify own fp=" + fingerprint);
				FingerprintStatus fingerprintStatus = axolotlService.getFingerprintTrust(fingerprint);
				if (fingerprintStatus != null) {
					if (!fingerprintStatus.isVerified()) {
						axolotlService.setFingerprintTrust(fingerprint, fingerprintStatus.toVerified());
						verifiedSomething = true;
					}
				} else {
					axolotlService.preVerifyFingerprint(account, fingerprint);
					verifiedSomething = true;
				}
			}
		}
		return verifiedSomething;
	}

	public boolean blindTrustBeforeVerification() {
		return getBooleanPreference(SettingsActivity.BLIND_TRUST_BEFORE_VERIFICATION, R.bool.btbv);
	}

	public ShortcutService getShortcutService() {
		return mShortcutService;
	}

	public void pushMamPreferences(Account account, Element prefs) {
		IqPacket set = new IqPacket(IqPacket.TYPE.SET);
		set.addChild(prefs);
		sendIqPacket(account, set, null);
	}

	public interface OnMamPreferencesFetched {
		void onPreferencesFetched(Element prefs);

		void onPreferencesFetchFailed();
	}

	public interface OnAccountCreated {
		void onAccountCreated(Account account);

		void informUser(int r);
	}

	public interface OnMoreMessagesLoaded {
		void onMoreMessagesLoaded(int count, Conversation conversation);

		void informUser(int r);
	}

	public interface OnAccountPasswordChanged {
		void onPasswordChangeSucceeded();

		void onPasswordChangeFailed();
	}

    public interface OnRoomDestroy {
        void onRoomDestroySucceeded();

        void onRoomDestroyFailed();
    }

	public interface OnAffiliationChanged {
		void onAffiliationChangedSuccessful(Jid jid);

		void onAffiliationChangeFailed(Jid jid, int resId);
	}

	public interface OnConversationUpdate {
		void onConversationUpdate();
	}

	public interface OnAccountUpdate {
		void onAccountUpdate();
	}

	public interface OnCaptchaRequested {
		void onCaptchaRequested(Account account, String id, Data data, Bitmap captcha);
	}

	public interface OnRosterUpdate {
		void onRosterUpdate();
	}

	public interface OnMucRosterUpdate {
		void onMucRosterUpdate();
	}

	public interface OnConferenceConfigurationFetched {
		void onConferenceConfigurationFetched(Conversation conversation);

		void onFetchFailed(Conversation conversation, Element error);
	}

	public interface OnConferenceJoined {
		void onConferenceJoined(Conversation conversation);
	}

	public interface OnConfigurationPushed {
		void onPushSucceeded();

		void onPushFailed();
	}

	public interface OnShowErrorToast {
		void onShowErrorToast(int resId);
	}

	public class XmppConnectionBinder extends Binder {
		public XmppConnectionService getService() {
			return XmppConnectionService.this;
		}
	}

	private class InternalEventReceiver extends BroadcastReceiver {

        @Override
        public void onReceive(Context context, Intent intent) {
            onStartCommand(intent,0,0);
        }
    }
}