nmode's Git Repositories - signal-cli/blob - lib/src/main/java/org/asamk/signal/manager/helper/IncomingMessageHandler.java

   1 package org.asamk.signal.manager.helper;
   2
   3 import org.asamk.signal.manager.JobExecutor;
   4 import org.asamk.signal.manager.Manager;
   5 import org.asamk.signal.manager.SignalDependencies;
   6 import org.asamk.signal.manager.TrustLevel;
   7 import org.asamk.signal.manager.UntrustedIdentityException;
   8 import org.asamk.signal.manager.actions.HandleAction;
   9 import org.asamk.signal.manager.actions.RefreshPreKeysAction;
  10 import org.asamk.signal.manager.actions.RenewSessionAction;
  11 import org.asamk.signal.manager.actions.RetrieveProfileAction;
  12 import org.asamk.signal.manager.actions.RetrieveStorageDataAction;
  13 import org.asamk.signal.manager.actions.SendGroupInfoAction;
  14 import org.asamk.signal.manager.actions.SendGroupInfoRequestAction;
  15 import org.asamk.signal.manager.actions.SendReceiptAction;
  16 import org.asamk.signal.manager.actions.SendRetryMessageRequestAction;
  17 import org.asamk.signal.manager.actions.SendSyncBlockedListAction;
  18 import org.asamk.signal.manager.actions.SendSyncContactsAction;
  19 import org.asamk.signal.manager.actions.SendSyncGroupsAction;
  20 import org.asamk.signal.manager.actions.SendSyncKeysAction;
  21 import org.asamk.signal.manager.groups.GroupId;
  22 import org.asamk.signal.manager.groups.GroupNotFoundException;
  23 import org.asamk.signal.manager.groups.GroupUtils;
  24 import org.asamk.signal.manager.jobs.RetrieveStickerPackJob;
  25 import org.asamk.signal.manager.storage.SignalAccount;
  26 import org.asamk.signal.manager.storage.groups.GroupInfoV1;
  27 import org.asamk.signal.manager.storage.recipients.Profile;
  28 import org.asamk.signal.manager.storage.recipients.RecipientId;
  29 import org.asamk.signal.manager.storage.recipients.RecipientResolver;
  30 import org.asamk.signal.manager.storage.stickers.Sticker;
  31 import org.asamk.signal.manager.storage.stickers.StickerPackId;
  32 import org.signal.libsignal.metadata.ProtocolInvalidKeyException;
  33 import org.signal.libsignal.metadata.ProtocolInvalidKeyIdException;
  34 import org.signal.libsignal.metadata.ProtocolInvalidMessageException;
  35 import org.signal.libsignal.metadata.ProtocolNoSessionException;
  36 import org.signal.libsignal.metadata.ProtocolUntrustedIdentityException;
  37 import org.signal.libsignal.metadata.SelfSendException;
  38 import org.signal.zkgroup.InvalidInputException;
  39 import org.signal.zkgroup.profiles.ProfileKey;
  40 import org.slf4j.Logger;
  41 import org.slf4j.LoggerFactory;
  42 import org.whispersystems.libsignal.SignalProtocolAddress;
  43 import org.whispersystems.libsignal.util.Pair;
  44 import org.whispersystems.signalservice.api.messages.SignalServiceContent;
  45 import org.whispersystems.signalservice.api.messages.SignalServiceDataMessage;
  46 import org.whispersystems.signalservice.api.messages.SignalServiceEnvelope;
  47 import org.whispersystems.signalservice.api.messages.SignalServiceGroup;
  48 import org.whispersystems.signalservice.api.messages.multidevice.SignalServiceSyncMessage;
  49 import org.whispersystems.signalservice.api.messages.multidevice.StickerPackOperationMessage;
  50 import org.whispersystems.signalservice.api.push.SignalServiceAddress;
  51
  52 import java.util.ArrayList;
  53 import java.util.List;
  54 import java.util.stream.Collectors;
  55
  56 public final class IncomingMessageHandler {
  57
  58     private final static Logger logger = LoggerFactory.getLogger(IncomingMessageHandler.class);
  59
  60     private final SignalAccount account;
  61     private final SignalDependencies dependencies;
  62     private final RecipientResolver recipientResolver;
  63     private final SignalServiceAddressResolver addressResolver;
  64     private final GroupHelper groupHelper;
  65     private final ContactHelper contactHelper;
  66     private final AttachmentHelper attachmentHelper;
  67     private final SyncHelper syncHelper;
  68     private final ProfileProvider profileProvider;
  69     private final JobExecutor jobExecutor;
  70
  71     public IncomingMessageHandler(
  72             final SignalAccount account,
  73             final SignalDependencies dependencies,
  74             final RecipientResolver recipientResolver,
  75             final SignalServiceAddressResolver addressResolver,
  76             final GroupHelper groupHelper,
  77             final ContactHelper contactHelper,
  78             final AttachmentHelper attachmentHelper,
  79             final SyncHelper syncHelper,
  80             final ProfileProvider profileProvider,
  81             final JobExecutor jobExecutor
  82     ) {
  83         this.account = account;
  84         this.dependencies = dependencies;
  85         this.recipientResolver = recipientResolver;
  86         this.addressResolver = addressResolver;
  87         this.groupHelper = groupHelper;
  88         this.contactHelper = contactHelper;
  89         this.attachmentHelper = attachmentHelper;
  90         this.syncHelper = syncHelper;
  91         this.profileProvider = profileProvider;
  92         this.jobExecutor = jobExecutor;
  93     }
  94
  95     public Pair<List<HandleAction>, Exception> handleRetryEnvelope(
  96             final SignalServiceEnvelope envelope,
  97             final boolean ignoreAttachments,
  98             final Manager.ReceiveMessageHandler handler
  99     ) {
 100         final List<HandleAction> actions = new ArrayList<>();
 101         if (envelope.isPreKeySignalMessage()) {
 102             actions.add(RefreshPreKeysAction.create());
 103         }
 104
 105         SignalServiceContent content = null;
 106         if (!envelope.isReceipt()) {
 107             try {
 108                 content = dependencies.getCipher().decrypt(envelope);
 109             } catch (ProtocolUntrustedIdentityException e) {
 110                 final var recipientId = account.getRecipientStore().resolveRecipient(e.getSender());
 111                 final var exception = new UntrustedIdentityException(addressResolver.resolveSignalServiceAddress(
 112                         recipientId), e.getSenderDevice());
 113                 return new Pair<>(List.of(), exception);
 114             } catch (Exception e) {
 115                 return new Pair<>(List.of(), e);
 116             }
 117         }
 118         actions.addAll(checkAndHandleMessage(envelope, content, ignoreAttachments, handler, null));
 119         return new Pair<>(actions, null);
 120     }
 121
 122     public Pair<List<HandleAction>, Exception> handleEnvelope(
 123             final SignalServiceEnvelope envelope,
 124             final boolean ignoreAttachments,
 125             final Manager.ReceiveMessageHandler handler
 126     ) {
 127         final var actions = new ArrayList<HandleAction>();
 128         if (envelope.hasSourceUuid()) {
 129             // Store uuid if we don't have it already
 130             // address/uuid in envelope is sent by server
 131             account.getRecipientStore().resolveRecipientTrusted(envelope.getSourceAddress());
 132         }
 133         SignalServiceContent content = null;
 134         Exception exception = null;
 135         if (!envelope.isReceipt()) {
 136             try {
 137                 content = dependencies.getCipher().decrypt(envelope);
 138             } catch (ProtocolUntrustedIdentityException e) {
 139                 final var recipientId = account.getRecipientStore().resolveRecipient(e.getSender());
 140                 actions.add(new RetrieveProfileAction(recipientId));
 141                 exception = new UntrustedIdentityException(addressResolver.resolveSignalServiceAddress(recipientId),
 142                         e.getSenderDevice());
 143             } catch (ProtocolInvalidKeyIdException | ProtocolInvalidKeyException | ProtocolNoSessionException | ProtocolInvalidMessageException e) {
 144                 final var sender = account.getRecipientStore().resolveRecipient(e.getSender());
 145                 final var senderProfile = profileProvider.getProfile(sender);
 146                 final var selfProfile = profileProvider.getProfile(account.getSelfRecipientId());
 147                 if (e.getSenderDevice() != account.getDeviceId()
 148                         && senderProfile != null
 149                         && senderProfile.getCapabilities().contains(Profile.Capability.senderKey)
 150                         && selfProfile != null
 151                         && selfProfile.getCapabilities().contains(Profile.Capability.senderKey)) {
 152                     logger.debug("Received invalid message, requesting message resend.");
 153                     actions.add(new SendRetryMessageRequestAction(sender, e, envelope));
 154                 } else {
 155                     logger.debug("Received invalid message, queuing renew session action.");
 156                     actions.add(new RenewSessionAction(sender));
 157                 }
 158                 exception = e;
 159             } catch (SelfSendException e) {
 160                 logger.debug("Dropping unidentified message from self.");
 161                 return new Pair<>(List.of(), null);
 162             } catch (Exception e) {
 163                 exception = e;
 164             }
 165         }
 166
 167         actions.addAll(checkAndHandleMessage(envelope, content, ignoreAttachments, handler, exception));
 168         return new Pair<>(actions, exception);
 169     }
 170
 171     private List<HandleAction> checkAndHandleMessage(
 172             final SignalServiceEnvelope envelope,
 173             final SignalServiceContent content,
 174             final boolean ignoreAttachments,
 175             final Manager.ReceiveMessageHandler handler,
 176             final Exception exception
 177     ) {
 178         if (!envelope.hasSourceUuid() && content != null) {
 179             // Store uuid if we don't have it already
 180             // address/uuid is validated by unidentified sender certificate
 181             account.getRecipientStore().resolveRecipientTrusted(content.getSender());
 182         }
 183         if (isMessageBlocked(envelope, content)) {
 184             logger.info("Ignoring a message from blocked user/group: {}", envelope.getTimestamp());
 185             return List.of();
 186         } else if (isNotAllowedToSendToGroup(envelope, content)) {
 187             logger.info("Ignoring a group message from an unauthorized sender (no member or admin): {} {}",
 188                     (envelope.hasSourceUuid() ? envelope.getSourceAddress() : content.getSender()).getIdentifier(),
 189                     envelope.getTimestamp());
 190             return List.of();
 191         } else {
 192             List<HandleAction> actions;
 193             if (content != null) {
 194                 actions = handleMessage(envelope, content, ignoreAttachments);
 195             } else {
 196                 actions = List.of();
 197             }
 198             handler.handleMessage(envelope, content, exception);
 199             return actions;
 200         }
 201     }
 202
 203     public List<HandleAction> handleMessage(
 204             SignalServiceEnvelope envelope, SignalServiceContent content, boolean ignoreAttachments
 205     ) {
 206         var actions = new ArrayList<HandleAction>();
 207         final RecipientId sender;
 208         final int senderDeviceId;
 209         if (!envelope.isUnidentifiedSender() && envelope.hasSourceUuid()) {
 210             sender = recipientResolver.resolveRecipient(envelope.getSourceAddress());
 211             senderDeviceId = envelope.getSourceDevice();
 212         } else {
 213             sender = recipientResolver.resolveRecipient(content.getSender());
 214             senderDeviceId = content.getSenderDevice();
 215         }
 216
 217         if (content.getSenderKeyDistributionMessage().isPresent()) {
 218             final var message = content.getSenderKeyDistributionMessage().get();
 219             final var protocolAddress = new SignalProtocolAddress(addressResolver.resolveSignalServiceAddress(sender)
 220                     .getIdentifier(), senderDeviceId);
 221             dependencies.getMessageSender().processSenderKeyDistributionMessage(protocolAddress, message);
 222         }
 223
 224         if (content.getDataMessage().isPresent()) {
 225             var message = content.getDataMessage().get();
 226
 227             if (content.isNeedsReceipt()) {
 228                 actions.add(new SendReceiptAction(sender, message.getTimestamp()));
 229             }
 230
 231             actions.addAll(handleSignalServiceDataMessage(message,
 232                     false,
 233                     sender,
 234                     account.getSelfRecipientId(),
 235                     ignoreAttachments));
 236         }
 237
 238         if (content.getSyncMessage().isPresent()) {
 239             var syncMessage = content.getSyncMessage().get();
 240             actions.addAll(handleSyncMessage(syncMessage, sender, ignoreAttachments));
 241         }
 242
 243         return actions;
 244     }
 245
 246     private List<HandleAction> handleSyncMessage(
 247             final SignalServiceSyncMessage syncMessage, final RecipientId sender, final boolean ignoreAttachments
 248     ) {
 249         var actions = new ArrayList<HandleAction>();
 250         account.setMultiDevice(true);
 251         if (syncMessage.getSent().isPresent()) {
 252             var message = syncMessage.getSent().get();
 253             final var destination = message.getDestination().orNull();
 254             actions.addAll(handleSignalServiceDataMessage(message.getMessage(),
 255                     true,
 256                     sender,
 257                     destination == null ? null : recipientResolver.resolveRecipient(destination),
 258                     ignoreAttachments));
 259         }
 260         if (syncMessage.getRequest().isPresent() && account.isMasterDevice()) {
 261             var rm = syncMessage.getRequest().get();
 262             if (rm.isContactsRequest()) {
 263                 actions.add(SendSyncContactsAction.create());
 264             }
 265             if (rm.isGroupsRequest()) {
 266                 actions.add(SendSyncGroupsAction.create());
 267             }
 268             if (rm.isBlockedListRequest()) {
 269                 actions.add(SendSyncBlockedListAction.create());
 270             }
 271             if (rm.isKeysRequest()) {
 272                 actions.add(SendSyncKeysAction.create());
 273             }
 274             // TODO Handle rm.isConfigurationRequest();
 275         }
 276         if (syncMessage.getGroups().isPresent()) {
 277             logger.warn("Received a group v1 sync message, that can't be handled anymore, ignoring.");
 278         }
 279         if (syncMessage.getBlockedList().isPresent()) {
 280             final var blockedListMessage = syncMessage.getBlockedList().get();
 281             for (var address : blockedListMessage.getAddresses()) {
 282                 contactHelper.setContactBlocked(recipientResolver.resolveRecipient(address), true);
 283             }
 284             for (var groupId : blockedListMessage.getGroupIds()
 285                     .stream()
 286                     .map(GroupId::unknownVersion)
 287                     .collect(Collectors.toSet())) {
 288                 try {
 289                     groupHelper.setGroupBlocked(groupId, true);
 290                 } catch (GroupNotFoundException e) {
 291                     logger.warn("BlockedListMessage contained groupID that was not found in GroupStore: {}",
 292                             groupId.toBase64());
 293                 }
 294             }
 295         }
 296         if (syncMessage.getContacts().isPresent()) {
 297             try {
 298                 final var contactsMessage = syncMessage.getContacts().get();
 299                 attachmentHelper.retrieveAttachment(contactsMessage.getContactsStream(),
 300                         syncHelper::handleSyncDeviceContacts);
 301             } catch (Exception e) {
 302                 logger.warn("Failed to handle received sync contacts, ignoring: {}", e.getMessage());
 303             }
 304         }
 305         if (syncMessage.getVerified().isPresent()) {
 306             final var verifiedMessage = syncMessage.getVerified().get();
 307             account.getIdentityKeyStore()
 308                     .setIdentityTrustLevel(account.getRecipientStore()
 309                                     .resolveRecipientTrusted(verifiedMessage.getDestination()),
 310                             verifiedMessage.getIdentityKey(),
 311                             TrustLevel.fromVerifiedState(verifiedMessage.getVerified()));
 312         }
 313         if (syncMessage.getStickerPackOperations().isPresent()) {
 314             final var stickerPackOperationMessages = syncMessage.getStickerPackOperations().get();
 315             for (var m : stickerPackOperationMessages) {
 316                 if (!m.getPackId().isPresent()) {
 317                     continue;
 318                 }
 319                 final var stickerPackId = StickerPackId.deserialize(m.getPackId().get());
 320                 final var installed = !m.getType().isPresent()
 321                         || m.getType().get() == StickerPackOperationMessage.Type.INSTALL;
 322
 323                 var sticker = account.getStickerStore().getSticker(stickerPackId);
 324                 if (m.getPackKey().isPresent()) {
 325                     if (sticker == null) {
 326                         sticker = new Sticker(stickerPackId, m.getPackKey().get());
 327                     }
 328                     if (installed) {
 329                         jobExecutor.enqueueJob(new RetrieveStickerPackJob(stickerPackId, m.getPackKey().get()));
 330                     }
 331                 }
 332
 333                 if (sticker != null) {
 334                     sticker.setInstalled(installed);
 335                     account.getStickerStore().updateSticker(sticker);
 336                 }
 337             }
 338         }
 339         if (syncMessage.getFetchType().isPresent()) {
 340             switch (syncMessage.getFetchType().get()) {
 341                 case LOCAL_PROFILE:
 342                     actions.add(new RetrieveProfileAction(account.getSelfRecipientId()));
 343                 case STORAGE_MANIFEST:
 344                     actions.add(RetrieveStorageDataAction.create());
 345             }
 346         }
 347         if (syncMessage.getKeys().isPresent()) {
 348             final var keysMessage = syncMessage.getKeys().get();
 349             if (keysMessage.getStorageService().isPresent()) {
 350                 final var storageKey = keysMessage.getStorageService().get();
 351                 account.setStorageKey(storageKey);
 352                 actions.add(RetrieveStorageDataAction.create());
 353             }
 354         }
 355         if (syncMessage.getConfiguration().isPresent()) {
 356             // TODO
 357         }
 358         return actions;
 359     }
 360
 361     private boolean isMessageBlocked(SignalServiceEnvelope envelope, SignalServiceContent content) {
 362         SignalServiceAddress source;
 363         if (!envelope.isUnidentifiedSender() && envelope.hasSourceUuid()) {
 364             source = envelope.getSourceAddress();
 365         } else if (content != null) {
 366             source = content.getSender();
 367         } else {
 368             return false;
 369         }
 370         final var recipientId = recipientResolver.resolveRecipient(source);
 371         if (contactHelper.isContactBlocked(recipientId)) {
 372             return true;
 373         }
 374
 375         if (content != null && content.getDataMessage().isPresent()) {
 376             var message = content.getDataMessage().get();
 377             if (message.getGroupContext().isPresent()) {
 378                 var groupId = GroupUtils.getGroupId(message.getGroupContext().get());
 379                 return groupHelper.isGroupBlocked(groupId);
 380             }
 381         }
 382
 383         return false;
 384     }
 385
 386     private boolean isNotAllowedToSendToGroup(SignalServiceEnvelope envelope, SignalServiceContent content) {
 387         SignalServiceAddress source;
 388         if (!envelope.isUnidentifiedSender() && envelope.hasSourceUuid()) {
 389             source = envelope.getSourceAddress();
 390         } else if (content != null) {
 391             source = content.getSender();
 392         } else {
 393             return false;
 394         }
 395
 396         if (content == null || !content.getDataMessage().isPresent()) {
 397             return false;
 398         }
 399
 400         var message = content.getDataMessage().get();
 401         if (!message.getGroupContext().isPresent()) {
 402             return false;
 403         }
 404
 405         if (message.getGroupContext().get().getGroupV1().isPresent()) {
 406             var groupInfo = message.getGroupContext().get().getGroupV1().get();
 407             if (groupInfo.getType() == SignalServiceGroup.Type.QUIT) {
 408                 return false;
 409             }
 410         }
 411
 412         var groupId = GroupUtils.getGroupId(message.getGroupContext().get());
 413         var group = groupHelper.getGroup(groupId);
 414         if (group == null) {
 415             return false;
 416         }
 417
 418         final var recipientId = recipientResolver.resolveRecipient(source);
 419         if (!group.isMember(recipientId)) {
 420             return true;
 421         }
 422
 423         if (group.isAnnouncementGroup() && !group.isAdmin(recipientId)) {
 424             return message.getBody().isPresent()
 425                     || message.getAttachments().isPresent()
 426                     || message.getQuote()
 427                     .isPresent()
 428                     || message.getPreviews().isPresent()
 429                     || message.getMentions().isPresent()
 430                     || message.getSticker().isPresent();
 431         }
 432         return false;
 433     }
 434
 435     private List<HandleAction> handleSignalServiceDataMessage(
 436             SignalServiceDataMessage message,
 437             boolean isSync,
 438             RecipientId source,
 439             RecipientId destination,
 440             boolean ignoreAttachments
 441     ) {
 442         var actions = new ArrayList<HandleAction>();
 443         if (message.getGroupContext().isPresent()) {
 444             if (message.getGroupContext().get().getGroupV1().isPresent()) {
 445                 var groupInfo = message.getGroupContext().get().getGroupV1().get();
 446                 var groupId = GroupId.v1(groupInfo.getGroupId());
 447                 var group = groupHelper.getGroup(groupId);
 448                 if (group == null || group instanceof GroupInfoV1) {
 449                     var groupV1 = (GroupInfoV1) group;
 450                     switch (groupInfo.getType()) {
 451                         case UPDATE: {
 452                             if (groupV1 == null) {
 453                                 groupV1 = new GroupInfoV1(groupId);
 454                             }
 455
 456                             if (groupInfo.getAvatar().isPresent()) {
 457                                 var avatar = groupInfo.getAvatar().get();
 458                                 groupHelper.downloadGroupAvatar(groupV1.getGroupId(), avatar);
 459                             }
 460
 461                             if (groupInfo.getName().isPresent()) {
 462                                 groupV1.name = groupInfo.getName().get();
 463                             }
 464
 465                             if (groupInfo.getMembers().isPresent()) {
 466                                 groupV1.addMembers(groupInfo.getMembers()
 467                                         .get()
 468                                         .stream()
 469                                         .map(recipientResolver::resolveRecipient)
 470                                         .collect(Collectors.toSet()));
 471                             }
 472
 473                             account.getGroupStore().updateGroup(groupV1);
 474                             break;
 475                         }
 476                         case DELIVER:
 477                             if (groupV1 == null && !isSync) {
 478                                 actions.add(new SendGroupInfoRequestAction(source, groupId));
 479                             }
 480                             break;
 481                         case QUIT: {
 482                             if (groupV1 != null) {
 483                                 groupV1.removeMember(source);
 484                                 account.getGroupStore().updateGroup(groupV1);
 485                             }
 486                             break;
 487                         }
 488                         case REQUEST_INFO:
 489                             if (groupV1 != null && !isSync) {
 490                                 actions.add(new SendGroupInfoAction(source, groupV1.getGroupId()));
 491                             }
 492                             break;
 493                     }
 494                 } else {
 495                     // Received a group v1 message for a v2 group
 496                 }
 497             }
 498             if (message.getGroupContext().get().getGroupV2().isPresent()) {
 499                 final var groupContext = message.getGroupContext().get().getGroupV2().get();
 500                 final var groupMasterKey = groupContext.getMasterKey();
 501
 502                 groupHelper.getOrMigrateGroup(groupMasterKey,
 503                         groupContext.getRevision(),
 504                         groupContext.hasSignedGroupChange() ? groupContext.getSignedGroupChange() : null);
 505             }
 506         }
 507
 508         final var conversationPartnerAddress = isSync ? destination : source;
 509         if (conversationPartnerAddress != null && message.isEndSession()) {
 510             account.getSessionStore().deleteAllSessions(conversationPartnerAddress);
 511         }
 512         if (message.isExpirationUpdate() || message.getBody().isPresent()) {
 513             if (message.getGroupContext().isPresent()) {
 514                 if (message.getGroupContext().get().getGroupV1().isPresent()) {
 515                     var groupInfo = message.getGroupContext().get().getGroupV1().get();
 516                     var group = account.getGroupStore().getOrCreateGroupV1(GroupId.v1(groupInfo.getGroupId()));
 517                     if (group != null) {
 518                         if (group.messageExpirationTime != message.getExpiresInSeconds()) {
 519                             group.messageExpirationTime = message.getExpiresInSeconds();
 520                             account.getGroupStore().updateGroup(group);
 521                         }
 522                     }
 523                 } else if (message.getGroupContext().get().getGroupV2().isPresent()) {
 524                     // disappearing message timer already stored in the DecryptedGroup
 525                 }
 526             } else if (conversationPartnerAddress != null) {
 527                 contactHelper.setExpirationTimer(conversationPartnerAddress, message.getExpiresInSeconds());
 528             }
 529         }
 530         if (!ignoreAttachments) {
 531             if (message.getAttachments().isPresent()) {
 532                 for (var attachment : message.getAttachments().get()) {
 533                     attachmentHelper.downloadAttachment(attachment);
 534                 }
 535             }
 536             if (message.getSharedContacts().isPresent()) {
 537                 for (var contact : message.getSharedContacts().get()) {
 538                     if (contact.getAvatar().isPresent()) {
 539                         attachmentHelper.downloadAttachment(contact.getAvatar().get().getAttachment());
 540                     }
 541                 }
 542             }
 543             if (message.getPreviews().isPresent()) {
 544                 final var previews = message.getPreviews().get();
 545                 for (var preview : previews) {
 546                     if (preview.getImage().isPresent()) {
 547                         attachmentHelper.downloadAttachment(preview.getImage().get());
 548                     }
 549                 }
 550             }
 551             if (message.getQuote().isPresent()) {
 552                 final var quote = message.getQuote().get();
 553
 554                 for (var quotedAttachment : quote.getAttachments()) {
 555                     final var thumbnail = quotedAttachment.getThumbnail();
 556                     if (thumbnail != null) {
 557                         attachmentHelper.downloadAttachment(thumbnail);
 558                     }
 559                 }
 560             }
 561         }
 562         if (message.getProfileKey().isPresent() && message.getProfileKey().get().length == 32) {
 563             final ProfileKey profileKey;
 564             try {
 565                 profileKey = new ProfileKey(message.getProfileKey().get());
 566             } catch (InvalidInputException e) {
 567                 throw new AssertionError(e);
 568             }
 569             if (account.getSelfRecipientId().equals(source)) {
 570                 this.account.setProfileKey(profileKey);
 571             }
 572             this.account.getProfileStore().storeProfileKey(source, profileKey);
 573         }
 574         if (message.getSticker().isPresent()) {
 575             final var messageSticker = message.getSticker().get();
 576             final var stickerPackId = StickerPackId.deserialize(messageSticker.getPackId());
 577             var sticker = account.getStickerStore().getSticker(stickerPackId);
 578             if (sticker == null) {
 579                 sticker = new Sticker(stickerPackId, messageSticker.getPackKey());
 580                 account.getStickerStore().updateSticker(sticker);
 581             }
 582             jobExecutor.enqueueJob(new RetrieveStickerPackJob(stickerPackId, messageSticker.getPackKey()));
 583         }
 584         return actions;
 585     }
 586 }