Conversation.java

   1package eu.siacs.conversations.entities;
   2
   3import android.content.ContentValues;
   4import android.database.Cursor;
   5import android.support.annotation.NonNull;
   6import android.support.annotation.Nullable;
   7import android.text.TextUtils;
   8
   9import com.google.common.collect.ComparisonChain;
  10import com.google.common.collect.Lists;
  11
  12import org.json.JSONArray;
  13import org.json.JSONException;
  14import org.json.JSONObject;
  15
  16import java.util.ArrayList;
  17import java.util.Collections;
  18import java.util.Iterator;
  19import java.util.List;
  20import java.util.ListIterator;
  21import java.util.concurrent.atomic.AtomicBoolean;
  22
  23import eu.siacs.conversations.Config;
  24import eu.siacs.conversations.crypto.OmemoSetting;
  25import eu.siacs.conversations.crypto.PgpDecryptionService;
  26import eu.siacs.conversations.persistance.DatabaseBackend;
  27import eu.siacs.conversations.services.AvatarService;
  28import eu.siacs.conversations.services.QuickConversationsService;
  29import eu.siacs.conversations.utils.JidHelper;
  30import eu.siacs.conversations.utils.UIHelper;
  31import eu.siacs.conversations.xmpp.chatstate.ChatState;
  32import eu.siacs.conversations.xmpp.mam.MamReference;
  33import eu.siacs.conversations.xmpp.Jid;
  34
  35import static eu.siacs.conversations.entities.Bookmark.printableValue;
  36
  37
  38public class Conversation extends AbstractEntity implements Blockable, Comparable<Conversation>, Conversational, AvatarService.Avatarable {
  39    public static final String TABLENAME = "conversations";
  40
  41    public static final int STATUS_AVAILABLE = 0;
  42    public static final int STATUS_ARCHIVED = 1;
  43
  44    public static final String NAME = "name";
  45    public static final String ACCOUNT = "accountUuid";
  46    public static final String CONTACT = "contactUuid";
  47    public static final String CONTACTJID = "contactJid";
  48    public static final String STATUS = "status";
  49    public static final String CREATED = "created";
  50    public static final String MODE = "mode";
  51    public static final String ATTRIBUTES = "attributes";
  52
  53    public static final String ATTRIBUTE_MUTED_TILL = "muted_till";
  54    public static final String ATTRIBUTE_ALWAYS_NOTIFY = "always_notify";
  55    public static final String ATTRIBUTE_LAST_CLEAR_HISTORY = "last_clear_history";
  56    public static final String ATTRIBUTE_FORMERLY_PRIVATE_NON_ANONYMOUS = "formerly_private_non_anonymous";
  57    public static final String ATTRIBUTE_PINNED_ON_TOP = "pinned_on_top";
  58    static final String ATTRIBUTE_MUC_PASSWORD = "muc_password";
  59    static final String ATTRIBUTE_MEMBERS_ONLY = "members_only";
  60    static final String ATTRIBUTE_MODERATED = "moderated";
  61    static final String ATTRIBUTE_NON_ANONYMOUS = "non_anonymous";
  62    private static final String ATTRIBUTE_NEXT_MESSAGE = "next_message";
  63    private static final String ATTRIBUTE_NEXT_MESSAGE_TIMESTAMP = "next_message_timestamp";
  64    private static final String ATTRIBUTE_CRYPTO_TARGETS = "crypto_targets";
  65    private static final String ATTRIBUTE_NEXT_ENCRYPTION = "next_encryption";
  66    private static final String ATTRIBUTE_CORRECTING_MESSAGE = "correcting_message";
  67    protected final ArrayList<Message> messages = new ArrayList<>();
  68    public AtomicBoolean messagesLoaded = new AtomicBoolean(true);
  69    protected Account account = null;
  70    private String draftMessage;
  71    private String name;
  72    private String contactUuid;
  73    private String accountUuid;
  74    private Jid contactJid;
  75    private int status;
  76    private long created;
  77    private int mode;
  78    private JSONObject attributes;
  79    private Jid nextCounterpart;
  80    private transient MucOptions mucOptions = null;
  81    private boolean messagesLeftOnServer = true;
  82    private ChatState mOutgoingChatState = Config.DEFAULT_CHAT_STATE;
  83    private ChatState mIncomingChatState = Config.DEFAULT_CHAT_STATE;
  84    private String mFirstMamReference = null;
  85
  86    public Conversation(final String name, final Account account, final Jid contactJid,
  87                        final int mode) {
  88        this(java.util.UUID.randomUUID().toString(), name, null, account
  89                        .getUuid(), contactJid, System.currentTimeMillis(),
  90                STATUS_AVAILABLE, mode, "");
  91        this.account = account;
  92    }
  93
  94    public Conversation(final String uuid, final String name, final String contactUuid,
  95                        final String accountUuid, final Jid contactJid, final long created, final int status,
  96                        final int mode, final String attributes) {
  97        this.uuid = uuid;
  98        this.name = name;
  99        this.contactUuid = contactUuid;
 100        this.accountUuid = accountUuid;
 101        this.contactJid = contactJid;
 102        this.created = created;
 103        this.status = status;
 104        this.mode = mode;
 105        try {
 106            this.attributes = new JSONObject(attributes == null ? "" : attributes);
 107        } catch (JSONException e) {
 108            this.attributes = new JSONObject();
 109        }
 110    }
 111
 112    public static Conversation fromCursor(Cursor cursor) {
 113        return new Conversation(cursor.getString(cursor.getColumnIndex(UUID)),
 114                cursor.getString(cursor.getColumnIndex(NAME)),
 115                cursor.getString(cursor.getColumnIndex(CONTACT)),
 116                cursor.getString(cursor.getColumnIndex(ACCOUNT)),
 117                JidHelper.parseOrFallbackToInvalid(cursor.getString(cursor.getColumnIndex(CONTACTJID))),
 118                cursor.getLong(cursor.getColumnIndex(CREATED)),
 119                cursor.getInt(cursor.getColumnIndex(STATUS)),
 120                cursor.getInt(cursor.getColumnIndex(MODE)),
 121                cursor.getString(cursor.getColumnIndex(ATTRIBUTES)));
 122    }
 123
 124    public static Message getLatestMarkableMessage(final List<Message> messages, boolean isPrivateAndNonAnonymousMuc) {
 125        for (int i = messages.size() - 1; i >= 0; --i) {
 126            final Message message = messages.get(i);
 127            if (message.getStatus() <= Message.STATUS_RECEIVED
 128                    && (message.markable || isPrivateAndNonAnonymousMuc)
 129                    && !message.isPrivateMessage()) {
 130                return message;
 131            }
 132        }
 133        return null;
 134    }
 135
 136    private static boolean suitableForOmemoByDefault(final Conversation conversation) {
 137        if (conversation.getJid().asBareJid().equals(Config.BUG_REPORTS)) {
 138            return false;
 139        }
 140        if (conversation.getContact().isOwnServer()) {
 141            return false;
 142        }
 143        final String contact = conversation.getJid().getDomain().toEscapedString();
 144        final String account = conversation.getAccount().getServer();
 145        if (Config.OMEMO_EXCEPTIONS.CONTACT_DOMAINS.contains(contact) || Config.OMEMO_EXCEPTIONS.ACCOUNT_DOMAINS.contains(account)) {
 146            return false;
 147        }
 148        return conversation.isSingleOrPrivateAndNonAnonymous() || conversation.getBooleanAttribute(ATTRIBUTE_FORMERLY_PRIVATE_NON_ANONYMOUS, false);
 149    }
 150
 151    public boolean hasMessagesLeftOnServer() {
 152        return messagesLeftOnServer;
 153    }
 154
 155    public void setHasMessagesLeftOnServer(boolean value) {
 156        this.messagesLeftOnServer = value;
 157    }
 158
 159    public Message getFirstUnreadMessage() {
 160        Message first = null;
 161        synchronized (this.messages) {
 162            for (int i = messages.size() - 1; i >= 0; --i) {
 163                if (messages.get(i).isRead()) {
 164                    return first;
 165                } else {
 166                    first = messages.get(i);
 167                }
 168            }
 169        }
 170        return first;
 171    }
 172
 173    public String findMostRecentRemoteDisplayableId() {
 174        final boolean multi = mode == Conversation.MODE_MULTI;
 175        synchronized (this.messages) {
 176            for(final Message message : Lists.reverse(this.messages)) {
 177                if (message.getStatus() == Message.STATUS_RECEIVED) {
 178                    final String serverMsgId = message.getServerMsgId();
 179                    if (serverMsgId != null && multi) {
 180                        return serverMsgId;
 181                    }
 182                    return message.getRemoteMsgId();
 183                }
 184            }
 185        }
 186        return null;
 187    }
 188
 189    public Message findUnsentMessageWithUuid(String uuid) {
 190        synchronized (this.messages) {
 191            for (final Message message : this.messages) {
 192                final int s = message.getStatus();
 193                if ((s == Message.STATUS_UNSEND || s == Message.STATUS_WAITING) && message.getUuid().equals(uuid)) {
 194                    return message;
 195                }
 196            }
 197        }
 198        return null;
 199    }
 200
 201    public void findWaitingMessages(OnMessageFound onMessageFound) {
 202        final ArrayList<Message> results = new ArrayList<>();
 203        synchronized (this.messages) {
 204            for (Message message : this.messages) {
 205                if (message.getStatus() == Message.STATUS_WAITING) {
 206                    results.add(message);
 207                }
 208            }
 209        }
 210        for (Message result : results) {
 211            onMessageFound.onMessageFound(result);
 212        }
 213    }
 214
 215    public void findUnreadMessages(OnMessageFound onMessageFound) {
 216        final ArrayList<Message> results = new ArrayList<>();
 217        synchronized (this.messages) {
 218            for (final Message message : this.messages) {
 219                if (message.isRead() || message.getType() == Message.TYPE_RTP_SESSION) {
 220                    continue;
 221                }
 222                results.add(message);
 223            }
 224        }
 225        for (final Message result : results) {
 226            onMessageFound.onMessageFound(result);
 227        }
 228    }
 229
 230    public Message findMessageWithFileAndUuid(final String uuid) {
 231        synchronized (this.messages) {
 232            for (final Message message : this.messages) {
 233                if (message.getUuid().equals(uuid)
 234                        && message.getEncryption() != Message.ENCRYPTION_PGP
 235                        && (message.isFileOrImage() || message.treatAsDownloadable())) {
 236                    return message;
 237                }
 238            }
 239        }
 240        return null;
 241    }
 242
 243    public boolean markAsDeleted(final List<String> uuids) {
 244        boolean deleted = false;
 245        final PgpDecryptionService pgpDecryptionService = account.getPgpDecryptionService();
 246        synchronized (this.messages) {
 247            for (Message message : this.messages) {
 248                if (uuids.contains(message.getUuid())) {
 249                    message.setDeleted(true);
 250                    deleted = true;
 251                    if (message.getEncryption() == Message.ENCRYPTION_PGP && pgpDecryptionService != null) {
 252                        pgpDecryptionService.discard(message);
 253                    }
 254                }
 255            }
 256        }
 257        return deleted;
 258    }
 259
 260    public boolean markAsChanged(final List<DatabaseBackend.FilePathInfo> files) {
 261        boolean changed = false;
 262        final PgpDecryptionService pgpDecryptionService = account.getPgpDecryptionService();
 263        synchronized (this.messages) {
 264            for (Message message : this.messages) {
 265                for (final DatabaseBackend.FilePathInfo file : files)
 266                    if (file.uuid.toString().equals(message.getUuid())) {
 267                        message.setDeleted(file.deleted);
 268                        changed = true;
 269                        if (file.deleted && message.getEncryption() == Message.ENCRYPTION_PGP && pgpDecryptionService != null) {
 270                            pgpDecryptionService.discard(message);
 271                        }
 272                    }
 273            }
 274        }
 275        return changed;
 276    }
 277
 278    public void clearMessages() {
 279        synchronized (this.messages) {
 280            this.messages.clear();
 281        }
 282    }
 283
 284    public boolean setIncomingChatState(ChatState state) {
 285        if (this.mIncomingChatState == state) {
 286            return false;
 287        }
 288        this.mIncomingChatState = state;
 289        return true;
 290    }
 291
 292    public ChatState getIncomingChatState() {
 293        return this.mIncomingChatState;
 294    }
 295
 296    public boolean setOutgoingChatState(ChatState state) {
 297        if (mode == MODE_SINGLE && !getContact().isSelf() || (isPrivateAndNonAnonymous() && getNextCounterpart() == null)) {
 298            if (this.mOutgoingChatState != state) {
 299                this.mOutgoingChatState = state;
 300                return true;
 301            }
 302        }
 303        return false;
 304    }
 305
 306    public ChatState getOutgoingChatState() {
 307        return this.mOutgoingChatState;
 308    }
 309
 310    public void trim() {
 311        synchronized (this.messages) {
 312            final int size = messages.size();
 313            final int maxsize = Config.PAGE_SIZE * Config.MAX_NUM_PAGES;
 314            if (size > maxsize) {
 315                List<Message> discards = this.messages.subList(0, size - maxsize);
 316                final PgpDecryptionService pgpDecryptionService = account.getPgpDecryptionService();
 317                if (pgpDecryptionService != null) {
 318                    pgpDecryptionService.discard(discards);
 319                }
 320                discards.clear();
 321                untieMessages();
 322            }
 323        }
 324    }
 325
 326    public void findUnsentTextMessages(OnMessageFound onMessageFound) {
 327        final ArrayList<Message> results = new ArrayList<>();
 328        synchronized (this.messages) {
 329            for (Message message : this.messages) {
 330                if ((message.getType() == Message.TYPE_TEXT || message.hasFileOnRemoteHost()) && message.getStatus() == Message.STATUS_UNSEND) {
 331                    results.add(message);
 332                }
 333            }
 334        }
 335        for (Message result : results) {
 336            onMessageFound.onMessageFound(result);
 337        }
 338    }
 339
 340    public Message findSentMessageWithUuidOrRemoteId(String id) {
 341        synchronized (this.messages) {
 342            for (Message message : this.messages) {
 343                if (id.equals(message.getUuid())
 344                        || (message.getStatus() >= Message.STATUS_SEND
 345                        && id.equals(message.getRemoteMsgId()))) {
 346                    return message;
 347                }
 348            }
 349        }
 350        return null;
 351    }
 352
 353    public Message findMessageWithRemoteIdAndCounterpart(String id, Jid counterpart, boolean received, boolean carbon) {
 354        synchronized (this.messages) {
 355            for (int i = this.messages.size() - 1; i >= 0; --i) {
 356                final Message message = messages.get(i);
 357                final Jid mcp = message.getCounterpart();
 358                if (mcp == null) {
 359                    continue;
 360                }
 361                if (mcp.equals(counterpart) && ((message.getStatus() == Message.STATUS_RECEIVED) == received)
 362                        && (carbon == message.isCarbon() || received)) {
 363                    final boolean idMatch = id.equals(message.getRemoteMsgId()) || message.remoteMsgIdMatchInEdit(id);
 364                    if (idMatch && !message.isFileOrImage() && !message.treatAsDownloadable()) {
 365                        return message;
 366                    } else {
 367                        return null;
 368                    }
 369                }
 370            }
 371        }
 372        return null;
 373    }
 374
 375    public Message findSentMessageWithUuid(String id) {
 376        synchronized (this.messages) {
 377            for (Message message : this.messages) {
 378                if (id.equals(message.getUuid())) {
 379                    return message;
 380                }
 381            }
 382        }
 383        return null;
 384    }
 385
 386    public Message findMessageWithRemoteId(String id, Jid counterpart) {
 387        synchronized (this.messages) {
 388            for (Message message : this.messages) {
 389                if (counterpart.equals(message.getCounterpart())
 390                        && (id.equals(message.getRemoteMsgId()) || id.equals(message.getUuid()))) {
 391                    return message;
 392                }
 393            }
 394        }
 395        return null;
 396    }
 397
 398    public Message findMessageWithServerMsgId(String id) {
 399        synchronized (this.messages) {
 400            for (Message message : this.messages) {
 401                if (id != null && id.equals(message.getServerMsgId())) {
 402                    return message;
 403                }
 404            }
 405        }
 406        return null;
 407    }
 408
 409    public boolean hasMessageWithCounterpart(Jid counterpart) {
 410        synchronized (this.messages) {
 411            for (Message message : this.messages) {
 412                if (counterpart.equals(message.getCounterpart())) {
 413                    return true;
 414                }
 415            }
 416        }
 417        return false;
 418    }
 419
 420    public void populateWithMessages(final List<Message> messages) {
 421        synchronized (this.messages) {
 422            messages.clear();
 423            messages.addAll(this.messages);
 424        }
 425        for (Iterator<Message> iterator = messages.iterator(); iterator.hasNext(); ) {
 426            if (iterator.next().wasMergedIntoPrevious()) {
 427                iterator.remove();
 428            }
 429        }
 430    }
 431
 432    @Override
 433    public boolean isBlocked() {
 434        return getContact().isBlocked();
 435    }
 436
 437    @Override
 438    public boolean isDomainBlocked() {
 439        return getContact().isDomainBlocked();
 440    }
 441
 442    @Override
 443    public Jid getBlockedJid() {
 444        return getContact().getBlockedJid();
 445    }
 446
 447    public int countMessages() {
 448        synchronized (this.messages) {
 449            return this.messages.size();
 450        }
 451    }
 452
 453    public String getFirstMamReference() {
 454        return this.mFirstMamReference;
 455    }
 456
 457    public void setFirstMamReference(String reference) {
 458        this.mFirstMamReference = reference;
 459    }
 460
 461    public void setLastClearHistory(long time, String reference) {
 462        if (reference != null) {
 463            setAttribute(ATTRIBUTE_LAST_CLEAR_HISTORY, String.valueOf(time) + ":" + reference);
 464        } else {
 465            setAttribute(ATTRIBUTE_LAST_CLEAR_HISTORY, time);
 466        }
 467    }
 468
 469    public MamReference getLastClearHistory() {
 470        return MamReference.fromAttribute(getAttribute(ATTRIBUTE_LAST_CLEAR_HISTORY));
 471    }
 472
 473    public List<Jid> getAcceptedCryptoTargets() {
 474        if (mode == MODE_SINGLE) {
 475            return Collections.singletonList(getJid().asBareJid());
 476        } else {
 477            return getJidListAttribute(ATTRIBUTE_CRYPTO_TARGETS);
 478        }
 479    }
 480
 481    public void setAcceptedCryptoTargets(List<Jid> acceptedTargets) {
 482        setAttribute(ATTRIBUTE_CRYPTO_TARGETS, acceptedTargets);
 483    }
 484
 485    public boolean setCorrectingMessage(Message correctingMessage) {
 486        setAttribute(ATTRIBUTE_CORRECTING_MESSAGE, correctingMessage == null ? null : correctingMessage.getUuid());
 487        return correctingMessage == null && draftMessage != null;
 488    }
 489
 490    public Message getCorrectingMessage() {
 491        final String uuid = getAttribute(ATTRIBUTE_CORRECTING_MESSAGE);
 492        return uuid == null ? null : findSentMessageWithUuid(uuid);
 493    }
 494
 495    public boolean withSelf() {
 496        return getContact().isSelf();
 497    }
 498
 499    @Override
 500    public int compareTo(@NonNull Conversation another) {
 501        return ComparisonChain.start()
 502                .compareFalseFirst(another.getBooleanAttribute(ATTRIBUTE_PINNED_ON_TOP, false), getBooleanAttribute(ATTRIBUTE_PINNED_ON_TOP,false))
 503                .compare(another.getSortableTime(), getSortableTime())
 504                .result();
 505    }
 506
 507    private long getSortableTime() {
 508        Draft draft = getDraft();
 509        long messageTime = getLatestMessage().getTimeSent();
 510        if (draft == null) {
 511            return messageTime;
 512        } else {
 513            return Math.max(messageTime, draft.getTimestamp());
 514        }
 515    }
 516
 517    public String getDraftMessage() {
 518        return draftMessage;
 519    }
 520
 521    public void setDraftMessage(String draftMessage) {
 522        this.draftMessage = draftMessage;
 523    }
 524
 525    public boolean isRead() {
 526        return (this.messages.size() == 0) || this.messages.get(this.messages.size() - 1).isRead();
 527    }
 528
 529    public List<Message> markRead(String upToUuid) {
 530        final List<Message> unread = new ArrayList<>();
 531        synchronized (this.messages) {
 532            for (Message message : this.messages) {
 533                if (!message.isRead()) {
 534                    message.markRead();
 535                    unread.add(message);
 536                }
 537                if (message.getUuid().equals(upToUuid)) {
 538                    return unread;
 539                }
 540            }
 541        }
 542        return unread;
 543    }
 544
 545    public Message getLatestMessage() {
 546        synchronized (this.messages) {
 547            if (this.messages.size() == 0) {
 548                Message message = new Message(this, "", Message.ENCRYPTION_NONE);
 549                message.setType(Message.TYPE_STATUS);
 550                message.setTime(Math.max(getCreated(), getLastClearHistory().getTimestamp()));
 551                return message;
 552            } else {
 553                return this.messages.get(this.messages.size() - 1);
 554            }
 555        }
 556    }
 557
 558    public @NonNull
 559    CharSequence getName() {
 560        if (getMode() == MODE_MULTI) {
 561            final String roomName = getMucOptions().getName();
 562            final String subject = getMucOptions().getSubject();
 563            final Bookmark bookmark = getBookmark();
 564            final String bookmarkName = bookmark != null ? bookmark.getBookmarkName() : null;
 565            if (printableValue(roomName)) {
 566                return roomName;
 567            } else if (printableValue(subject)) {
 568                return subject;
 569            } else if (printableValue(bookmarkName, false)) {
 570                return bookmarkName;
 571            } else {
 572                final String generatedName = getMucOptions().createNameFromParticipants();
 573                if (printableValue(generatedName)) {
 574                    return generatedName;
 575                } else {
 576                    return contactJid.getLocal() != null ? contactJid.getLocal() : contactJid;
 577                }
 578            }
 579        } else if ((QuickConversationsService.isConversations() || !Config.QUICKSY_DOMAIN.equals(contactJid.getDomain())) && isWithStranger()) {
 580            return contactJid;
 581        } else {
 582            return this.getContact().getDisplayName();
 583        }
 584    }
 585
 586    public String getAccountUuid() {
 587        return this.accountUuid;
 588    }
 589
 590    public Account getAccount() {
 591        return this.account;
 592    }
 593
 594    public void setAccount(final Account account) {
 595        this.account = account;
 596    }
 597
 598    public Contact getContact() {
 599        return this.account.getRoster().getContact(this.contactJid);
 600    }
 601
 602    @Override
 603    public Jid getJid() {
 604        return this.contactJid;
 605    }
 606
 607    public int getStatus() {
 608        return this.status;
 609    }
 610
 611    public void setStatus(int status) {
 612        this.status = status;
 613    }
 614
 615    public long getCreated() {
 616        return this.created;
 617    }
 618
 619    public ContentValues getContentValues() {
 620        ContentValues values = new ContentValues();
 621        values.put(UUID, uuid);
 622        values.put(NAME, name);
 623        values.put(CONTACT, contactUuid);
 624        values.put(ACCOUNT, accountUuid);
 625        values.put(CONTACTJID, contactJid.toString());
 626        values.put(CREATED, created);
 627        values.put(STATUS, status);
 628        values.put(MODE, mode);
 629        synchronized (this.attributes) {
 630            values.put(ATTRIBUTES, attributes.toString());
 631        }
 632        return values;
 633    }
 634
 635    public int getMode() {
 636        return this.mode;
 637    }
 638
 639    public void setMode(int mode) {
 640        this.mode = mode;
 641    }
 642
 643    /**
 644     * short for is Private and Non-anonymous
 645     */
 646    public boolean isSingleOrPrivateAndNonAnonymous() {
 647        return mode == MODE_SINGLE || isPrivateAndNonAnonymous();
 648    }
 649
 650    public boolean isPrivateAndNonAnonymous() {
 651        return getMucOptions().isPrivateAndNonAnonymous();
 652    }
 653
 654    public synchronized MucOptions getMucOptions() {
 655        if (this.mucOptions == null) {
 656            this.mucOptions = new MucOptions(this);
 657        }
 658        return this.mucOptions;
 659    }
 660
 661    public void resetMucOptions() {
 662        this.mucOptions = null;
 663    }
 664
 665    public void setContactJid(final Jid jid) {
 666        this.contactJid = jid;
 667    }
 668
 669    public Jid getNextCounterpart() {
 670        return this.nextCounterpart;
 671    }
 672
 673    public void setNextCounterpart(Jid jid) {
 674        this.nextCounterpart = jid;
 675    }
 676
 677    public int getNextEncryption() {
 678        if (!Config.supportOmemo() && !Config.supportOpenPgp()) {
 679            return Message.ENCRYPTION_NONE;
 680        }
 681        if (OmemoSetting.isAlways()) {
 682            return suitableForOmemoByDefault(this) ? Message.ENCRYPTION_AXOLOTL : Message.ENCRYPTION_NONE;
 683        }
 684        final int defaultEncryption;
 685        if (suitableForOmemoByDefault(this)) {
 686            defaultEncryption = OmemoSetting.getEncryption();
 687        } else {
 688            defaultEncryption = Message.ENCRYPTION_NONE;
 689        }
 690        int encryption = this.getIntAttribute(ATTRIBUTE_NEXT_ENCRYPTION, defaultEncryption);
 691        if (encryption == Message.ENCRYPTION_OTR || encryption < 0) {
 692            return defaultEncryption;
 693        } else {
 694            return encryption;
 695        }
 696    }
 697
 698    public boolean setNextEncryption(int encryption) {
 699        return this.setAttribute(ATTRIBUTE_NEXT_ENCRYPTION, encryption);
 700    }
 701
 702    public String getNextMessage() {
 703        final String nextMessage = getAttribute(ATTRIBUTE_NEXT_MESSAGE);
 704        return nextMessage == null ? "" : nextMessage;
 705    }
 706
 707    public @Nullable
 708    Draft getDraft() {
 709        long timestamp = getLongAttribute(ATTRIBUTE_NEXT_MESSAGE_TIMESTAMP, 0);
 710        if (timestamp > getLatestMessage().getTimeSent()) {
 711            String message = getAttribute(ATTRIBUTE_NEXT_MESSAGE);
 712            if (!TextUtils.isEmpty(message) && timestamp != 0) {
 713                return new Draft(message, timestamp);
 714            }
 715        }
 716        return null;
 717    }
 718
 719    public boolean setNextMessage(final String input) {
 720        final String message = input == null || input.trim().isEmpty() ? null : input;
 721        boolean changed = !getNextMessage().equals(message);
 722        this.setAttribute(ATTRIBUTE_NEXT_MESSAGE, message);
 723        if (changed) {
 724            this.setAttribute(ATTRIBUTE_NEXT_MESSAGE_TIMESTAMP, message == null ? 0 : System.currentTimeMillis());
 725        }
 726        return changed;
 727    }
 728
 729    public Bookmark getBookmark() {
 730        return this.account.getBookmark(this.contactJid);
 731    }
 732
 733    public Message findDuplicateMessage(Message message) {
 734        synchronized (this.messages) {
 735            for (int i = this.messages.size() - 1; i >= 0; --i) {
 736                if (this.messages.get(i).similar(message)) {
 737                    return this.messages.get(i);
 738                }
 739            }
 740        }
 741        return null;
 742    }
 743
 744    public boolean hasDuplicateMessage(Message message) {
 745        return findDuplicateMessage(message) != null;
 746    }
 747
 748    public Message findSentMessageWithBody(String body) {
 749        synchronized (this.messages) {
 750            for (int i = this.messages.size() - 1; i >= 0; --i) {
 751                Message message = this.messages.get(i);
 752                if (message.getStatus() == Message.STATUS_UNSEND || message.getStatus() == Message.STATUS_SEND) {
 753                    String otherBody;
 754                    if (message.hasFileOnRemoteHost()) {
 755                        otherBody = message.getFileParams().url.toString();
 756                    } else {
 757                        otherBody = message.body;
 758                    }
 759                    if (otherBody != null && otherBody.equals(body)) {
 760                        return message;
 761                    }
 762                }
 763            }
 764            return null;
 765        }
 766    }
 767
 768    public Message findRtpSession(final String sessionId, final int s) {
 769        synchronized (this.messages) {
 770            for (int i = this.messages.size() - 1; i >= 0; --i) {
 771                final Message message = this.messages.get(i);
 772                if ((message.getStatus() == s) && (message.getType() == Message.TYPE_RTP_SESSION) && sessionId.equals(message.getRemoteMsgId())) {
 773                    return message;
 774                }
 775            }
 776        }
 777        return null;
 778    }
 779
 780    public boolean possibleDuplicate(final String serverMsgId, final String remoteMsgId) {
 781        if (serverMsgId == null || remoteMsgId == null) {
 782            return false;
 783        }
 784        synchronized (this.messages) {
 785            for (Message message : this.messages) {
 786                if (serverMsgId.equals(message.getServerMsgId()) || remoteMsgId.equals(message.getRemoteMsgId())) {
 787                    return true;
 788                }
 789            }
 790        }
 791        return false;
 792    }
 793
 794    public MamReference getLastMessageTransmitted() {
 795        final MamReference lastClear = getLastClearHistory();
 796        MamReference lastReceived = new MamReference(0);
 797        synchronized (this.messages) {
 798            for (int i = this.messages.size() - 1; i >= 0; --i) {
 799                final Message message = this.messages.get(i);
 800                if (message.isPrivateMessage()) {
 801                    continue; //it's unsafe to use private messages as anchor. They could be coming from user archive
 802                }
 803                if (message.getStatus() == Message.STATUS_RECEIVED || message.isCarbon() || message.getServerMsgId() != null) {
 804                    lastReceived = new MamReference(message.getTimeSent(), message.getServerMsgId());
 805                    break;
 806                }
 807            }
 808        }
 809        return MamReference.max(lastClear, lastReceived);
 810    }
 811
 812    public void setMutedTill(long value) {
 813        this.setAttribute(ATTRIBUTE_MUTED_TILL, String.valueOf(value));
 814    }
 815
 816    public boolean isMuted() {
 817        return System.currentTimeMillis() < this.getLongAttribute(ATTRIBUTE_MUTED_TILL, 0);
 818    }
 819
 820    public boolean alwaysNotify() {
 821        return mode == MODE_SINGLE || getBooleanAttribute(ATTRIBUTE_ALWAYS_NOTIFY, Config.ALWAYS_NOTIFY_BY_DEFAULT || isPrivateAndNonAnonymous());
 822    }
 823
 824    public boolean setAttribute(String key, boolean value) {
 825        return setAttribute(key, String.valueOf(value));
 826    }
 827
 828    private boolean setAttribute(String key, long value) {
 829        return setAttribute(key, Long.toString(value));
 830    }
 831
 832    private boolean setAttribute(String key, int value) {
 833        return setAttribute(key, String.valueOf(value));
 834    }
 835
 836    public boolean setAttribute(String key, String value) {
 837        synchronized (this.attributes) {
 838            try {
 839                if (value == null) {
 840                    if (this.attributes.has(key)) {
 841                        this.attributes.remove(key);
 842                        return true;
 843                    } else {
 844                        return false;
 845                    }
 846                } else {
 847                    final String prev = this.attributes.optString(key, null);
 848                    this.attributes.put(key, value);
 849                    return !value.equals(prev);
 850                }
 851            } catch (JSONException e) {
 852                throw new AssertionError(e);
 853            }
 854        }
 855    }
 856
 857    public boolean setAttribute(String key, List<Jid> jids) {
 858        JSONArray array = new JSONArray();
 859        for (Jid jid : jids) {
 860            array.put(jid.asBareJid().toString());
 861        }
 862        synchronized (this.attributes) {
 863            try {
 864                this.attributes.put(key, array);
 865                return true;
 866            } catch (JSONException e) {
 867                return false;
 868            }
 869        }
 870    }
 871
 872    public String getAttribute(String key) {
 873        synchronized (this.attributes) {
 874            return this.attributes.optString(key, null);
 875        }
 876    }
 877
 878    private List<Jid> getJidListAttribute(String key) {
 879        ArrayList<Jid> list = new ArrayList<>();
 880        synchronized (this.attributes) {
 881            try {
 882                JSONArray array = this.attributes.getJSONArray(key);
 883                for (int i = 0; i < array.length(); ++i) {
 884                    try {
 885                        list.add(Jid.of(array.getString(i)));
 886                    } catch (IllegalArgumentException e) {
 887                        //ignored
 888                    }
 889                }
 890            } catch (JSONException e) {
 891                //ignored
 892            }
 893        }
 894        return list;
 895    }
 896
 897    private int getIntAttribute(String key, int defaultValue) {
 898        String value = this.getAttribute(key);
 899        if (value == null) {
 900            return defaultValue;
 901        } else {
 902            try {
 903                return Integer.parseInt(value);
 904            } catch (NumberFormatException e) {
 905                return defaultValue;
 906            }
 907        }
 908    }
 909
 910    public long getLongAttribute(String key, long defaultValue) {
 911        String value = this.getAttribute(key);
 912        if (value == null) {
 913            return defaultValue;
 914        } else {
 915            try {
 916                return Long.parseLong(value);
 917            } catch (NumberFormatException e) {
 918                return defaultValue;
 919            }
 920        }
 921    }
 922
 923    public boolean getBooleanAttribute(String key, boolean defaultValue) {
 924        String value = this.getAttribute(key);
 925        if (value == null) {
 926            return defaultValue;
 927        } else {
 928            return Boolean.parseBoolean(value);
 929        }
 930    }
 931
 932    public void add(Message message) {
 933        synchronized (this.messages) {
 934            this.messages.add(message);
 935        }
 936    }
 937
 938    public void prepend(int offset, Message message) {
 939        synchronized (this.messages) {
 940            this.messages.add(Math.min(offset, this.messages.size()), message);
 941        }
 942    }
 943
 944    public void addAll(int index, List<Message> messages) {
 945        synchronized (this.messages) {
 946            this.messages.addAll(index, messages);
 947        }
 948        account.getPgpDecryptionService().decrypt(messages);
 949    }
 950
 951    public void expireOldMessages(long timestamp) {
 952        synchronized (this.messages) {
 953            for (ListIterator<Message> iterator = this.messages.listIterator(); iterator.hasNext(); ) {
 954                if (iterator.next().getTimeSent() < timestamp) {
 955                    iterator.remove();
 956                }
 957            }
 958            untieMessages();
 959        }
 960    }
 961
 962    public void sort() {
 963        synchronized (this.messages) {
 964            Collections.sort(this.messages, (left, right) -> {
 965                if (left.getTimeSent() < right.getTimeSent()) {
 966                    return -1;
 967                } else if (left.getTimeSent() > right.getTimeSent()) {
 968                    return 1;
 969                } else {
 970                    return 0;
 971                }
 972            });
 973            untieMessages();
 974        }
 975    }
 976
 977    private void untieMessages() {
 978        for (Message message : this.messages) {
 979            message.untie();
 980        }
 981    }
 982
 983    public int unreadCount() {
 984        synchronized (this.messages) {
 985            int count = 0;
 986            for (int i = this.messages.size() - 1; i >= 0; --i) {
 987                if (this.messages.get(i).isRead()) {
 988                    return count;
 989                }
 990                ++count;
 991            }
 992            return count;
 993        }
 994    }
 995
 996    public int receivedMessagesCount() {
 997        int count = 0;
 998        synchronized (this.messages) {
 999            for (Message message : messages) {
1000                if (message.getStatus() == Message.STATUS_RECEIVED) {
1001                    ++count;
1002                }
1003            }
1004        }
1005        return count;
1006    }
1007
1008    public int sentMessagesCount() {
1009        int count = 0;
1010        synchronized (this.messages) {
1011            for (Message message : messages) {
1012                if (message.getStatus() != Message.STATUS_RECEIVED) {
1013                    ++count;
1014                }
1015            }
1016        }
1017        return count;
1018    }
1019
1020    public boolean isWithStranger() {
1021        final Contact contact = getContact();
1022        return mode == MODE_SINGLE
1023                && !contact.isOwnServer()
1024                && !contact.showInContactList()
1025                && !contact.isSelf()
1026                && !JidHelper.isQuicksyDomain(contact.getJid())
1027                && sentMessagesCount() == 0;
1028    }
1029
1030    public int getReceivedMessagesCountSinceUuid(String uuid) {
1031        if (uuid == null) {
1032            return 0;
1033        }
1034        int count = 0;
1035        synchronized (this.messages) {
1036            for (int i = messages.size() - 1; i >= 0; i--) {
1037                final Message message = messages.get(i);
1038                if (uuid.equals(message.getUuid())) {
1039                    return count;
1040                }
1041                if (message.getStatus() <= Message.STATUS_RECEIVED) {
1042                    ++count;
1043                }
1044            }
1045        }
1046        return 0;
1047    }
1048
1049    @Override
1050    public int getAvatarBackgroundColor() {
1051        return UIHelper.getColorForName(getName().toString());
1052    }
1053
1054    public interface OnMessageFound {
1055        void onMessageFound(final Message message);
1056    }
1057
1058    public static class Draft {
1059        private final String message;
1060        private final long timestamp;
1061
1062        private Draft(String message, long timestamp) {
1063            this.message = message;
1064            this.timestamp = timestamp;
1065        }
1066
1067        public long getTimestamp() {
1068            return timestamp;
1069        }
1070
1071        public String getMessage() {
1072            return message;
1073        }
1074    }
1075}