nmode's Git Repositories - signal-cli/blob - src/main/java/org/asamk/signal/ReceiveMessageHandler.java

   1 package org.asamk.signal;
   2
   3 import org.asamk.signal.manager.Manager;
   4 import org.asamk.signal.storage.contacts.ContactInfo;
   5 import org.asamk.signal.storage.groups.GroupInfo;
   6 import org.asamk.signal.util.DateUtils;
   7 import org.asamk.signal.util.Util;
   8 import org.whispersystems.signalservice.api.messages.SignalServiceAttachment;
   9 import org.whispersystems.signalservice.api.messages.SignalServiceAttachmentPointer;
  10 import org.whispersystems.signalservice.api.messages.SignalServiceContent;
  11 import org.whispersystems.signalservice.api.messages.SignalServiceDataMessage;
  12 import org.whispersystems.signalservice.api.messages.SignalServiceEnvelope;
  13 import org.whispersystems.signalservice.api.messages.SignalServiceGroup;
  14 import org.whispersystems.signalservice.api.messages.SignalServiceGroupContext;
  15 import org.whispersystems.signalservice.api.messages.SignalServiceGroupV2;
  16 import org.whispersystems.signalservice.api.messages.SignalServiceReceiptMessage;
  17 import org.whispersystems.signalservice.api.messages.SignalServiceTypingMessage;
  18 import org.whispersystems.signalservice.api.messages.calls.AnswerMessage;
  19 import org.whispersystems.signalservice.api.messages.calls.BusyMessage;
  20 import org.whispersystems.signalservice.api.messages.calls.HangupMessage;
  21 import org.whispersystems.signalservice.api.messages.calls.IceUpdateMessage;
  22 import org.whispersystems.signalservice.api.messages.calls.OfferMessage;
  23 import org.whispersystems.signalservice.api.messages.calls.SignalServiceCallMessage;
  24 import org.whispersystems.signalservice.api.messages.multidevice.BlockedListMessage;
  25 import org.whispersystems.signalservice.api.messages.multidevice.ConfigurationMessage;
  26 import org.whispersystems.signalservice.api.messages.multidevice.ContactsMessage;
  27 import org.whispersystems.signalservice.api.messages.multidevice.KeysMessage;
  28 import org.whispersystems.signalservice.api.messages.multidevice.MessageRequestResponseMessage;
  29 import org.whispersystems.signalservice.api.messages.multidevice.ReadMessage;
  30 import org.whispersystems.signalservice.api.messages.multidevice.SentTranscriptMessage;
  31 import org.whispersystems.signalservice.api.messages.multidevice.SignalServiceSyncMessage;
  32 import org.whispersystems.signalservice.api.messages.multidevice.StickerPackOperationMessage;
  33 import org.whispersystems.signalservice.api.messages.multidevice.VerifiedMessage;
  34 import org.whispersystems.signalservice.api.messages.multidevice.ViewOnceOpenMessage;
  35 import org.whispersystems.signalservice.api.messages.shared.SharedContact;
  36 import org.whispersystems.signalservice.api.push.SignalServiceAddress;
  37 import org.whispersystems.util.Base64;
  38
  39 import java.io.File;
  40 import java.util.List;
  41
  42 public class ReceiveMessageHandler implements Manager.ReceiveMessageHandler {
  43
  44     final Manager m;
  45
  46     public ReceiveMessageHandler(Manager m) {
  47         this.m = m;
  48     }
  49
  50     @Override
  51     public void handleMessage(SignalServiceEnvelope envelope, SignalServiceContent content, Throwable exception) {
  52         if (!envelope.isUnidentifiedSender() && envelope.hasSource()) {
  53             SignalServiceAddress source = envelope.getSourceAddress();
  54             ContactInfo sourceContact = m.getContact(source.getLegacyIdentifier());
  55             System.out.println(String.format("Envelope from: %s (device: %d)",
  56                     (sourceContact == null ? "" : "“" + sourceContact.name + "” ") + source.getLegacyIdentifier(),
  57                     envelope.getSourceDevice()));
  58             if (source.getRelay().isPresent()) {
  59                 System.out.println("Relayed by: " + source.getRelay().get());
  60             }
  61         } else {
  62             System.out.println("Envelope from: unknown source");
  63         }
  64         System.out.println("Timestamp: " + DateUtils.formatTimestamp(envelope.getTimestamp()));
  65         if (envelope.isUnidentifiedSender()) {
  66             System.out.println("Sent by unidentified/sealed sender");
  67         }
  68
  69         if (envelope.isReceipt()) {
  70             System.out.println("Got receipt.");
  71         } else if (envelope.isSignalMessage() || envelope.isPreKeySignalMessage() || envelope.isUnidentifiedSender()) {
  72             if (exception != null) {
  73                 if (exception instanceof org.whispersystems.libsignal.UntrustedIdentityException) {
  74                     org.whispersystems.libsignal.UntrustedIdentityException e = (org.whispersystems.libsignal.UntrustedIdentityException) exception;
  75                     System.out.println(
  76                             "The user’s key is untrusted, either the user has reinstalled Signal or a third party sent this message.");
  77                     System.out.println("Use 'signal-cli -u "
  78                             + m.getUsername()
  79                             + " listIdentities -n "
  80                             + e.getName()
  81                             + "', verify the key and run 'signal-cli -u "
  82                             + m.getUsername()
  83                             + " trust -v \"FINGER_PRINT\" "
  84                             + e.getName()
  85                             + "' to mark it as trusted");
  86                     System.out.println("If you don't care about security, use 'signal-cli -u "
  87                             + m.getUsername()
  88                             + " trust -a "
  89                             + e.getName()
  90                             + "' to trust it without verification");
  91                 } else {
  92                     System.out.println("Exception: " + exception.getMessage() + " (" + exception.getClass()
  93                             .getSimpleName() + ")");
  94                 }
  95             }
  96             if (content == null) {
  97                 System.out.println("Failed to decrypt message.");
  98             } else {
  99                 ContactInfo sourceContact = m.getContact(content.getSender().getLegacyIdentifier());
 100                 System.out.println(String.format("Sender: %s (device: %d)",
 101                         (sourceContact == null ? "" : "“" + sourceContact.name + "” ") + content.getSender()
 102                                 .getLegacyIdentifier(),
 103                         content.getSenderDevice()));
 104                 if (content.getDataMessage().isPresent()) {
 105                     SignalServiceDataMessage message = content.getDataMessage().get();
 106                     handleSignalServiceDataMessage(message);
 107                 }
 108                 if (content.getSyncMessage().isPresent()) {
 109                     System.out.println("Received a sync message");
 110                     SignalServiceSyncMessage syncMessage = content.getSyncMessage().get();
 111
 112                     if (syncMessage.getContacts().isPresent()) {
 113                         final ContactsMessage contactsMessage = syncMessage.getContacts().get();
 114                         if (contactsMessage.isComplete()) {
 115                             System.out.println("Received complete sync contacts");
 116                         } else {
 117                             System.out.println("Received sync contacts");
 118                         }
 119                         printAttachment(contactsMessage.getContactsStream());
 120                     }
 121                     if (syncMessage.getGroups().isPresent()) {
 122                         System.out.println("Received sync groups");
 123                         printAttachment(syncMessage.getGroups().get());
 124                     }
 125                     if (syncMessage.getRead().isPresent()) {
 126                         System.out.println("Received sync read messages list");
 127                         for (ReadMessage rm : syncMessage.getRead().get()) {
 128                             ContactInfo fromContact = m.getContact(rm.getSender().getLegacyIdentifier());
 129                             System.out.println("From: "
 130                                     + (fromContact == null ? "" : "“" + fromContact.name + "” ")
 131                                     + rm.getSender().getLegacyIdentifier()
 132                                     + " Message timestamp: "
 133                                     + DateUtils.formatTimestamp(rm.getTimestamp()));
 134                         }
 135                     }
 136                     if (syncMessage.getRequest().isPresent()) {
 137                         System.out.println("Received sync request");
 138                         if (syncMessage.getRequest().get().isContactsRequest()) {
 139                             System.out.println(" - contacts request");
 140                         }
 141                         if (syncMessage.getRequest().get().isGroupsRequest()) {
 142                             System.out.println(" - groups request");
 143                         }
 144                         if (syncMessage.getRequest().get().isBlockedListRequest()) {
 145                             System.out.println(" - blocked list request");
 146                         }
 147                         if (syncMessage.getRequest().get().isConfigurationRequest()) {
 148                             System.out.println(" - configuration request");
 149                         }
 150                         if (syncMessage.getRequest().get().isKeysRequest()) {
 151                             System.out.println(" - keys request");
 152                         }
 153                     }
 154                     if (syncMessage.getSent().isPresent()) {
 155                         System.out.println("Received sync sent message");
 156                         final SentTranscriptMessage sentTranscriptMessage = syncMessage.getSent().get();
 157                         String to;
 158                         if (sentTranscriptMessage.getDestination().isPresent()) {
 159                             String dest = sentTranscriptMessage.getDestination().get().getLegacyIdentifier();
 160                             ContactInfo destContact = m.getContact(dest);
 161                             to = (destContact == null ? "" : "“" + destContact.name + "” ") + dest;
 162                         } else if (sentTranscriptMessage.getRecipients().size() > 0) {
 163                             StringBuilder toBuilder = new StringBuilder();
 164                             for (SignalServiceAddress dest : sentTranscriptMessage.getRecipients()) {
 165                                 ContactInfo destContact = m.getContact(dest.getLegacyIdentifier());
 166                                 toBuilder.append(destContact == null ? "" : "“" + destContact.name + "” ")
 167                                         .append(dest.getLegacyIdentifier())
 168                                         .append(" ");
 169                             }
 170                             to = toBuilder.toString();
 171                         } else {
 172                             to = "Unknown";
 173                         }
 174                         System.out.println("To: " + to + " , Message timestamp: " + DateUtils.formatTimestamp(
 175                                 sentTranscriptMessage.getTimestamp()));
 176                         if (sentTranscriptMessage.getExpirationStartTimestamp() > 0) {
 177                             System.out.println("Expiration started at: " + DateUtils.formatTimestamp(
 178                                     sentTranscriptMessage.getExpirationStartTimestamp()));
 179                         }
 180                         SignalServiceDataMessage message = sentTranscriptMessage.getMessage();
 181                         handleSignalServiceDataMessage(message);
 182                     }
 183                     if (syncMessage.getBlockedList().isPresent()) {
 184                         System.out.println("Received sync message with block list");
 185                         System.out.println("Blocked numbers:");
 186                         final BlockedListMessage blockedList = syncMessage.getBlockedList().get();
 187                         for (SignalServiceAddress address : blockedList.getAddresses()) {
 188                             System.out.println(" - " + address.getLegacyIdentifier());
 189                         }
 190                     }
 191                     if (syncMessage.getVerified().isPresent()) {
 192                         System.out.println("Received sync message with verified identities:");
 193                         final VerifiedMessage verifiedMessage = syncMessage.getVerified().get();
 194                         System.out.println(" - "
 195                                 + verifiedMessage.getDestination()
 196                                 + ": "
 197                                 + verifiedMessage.getVerified());
 198                         String safetyNumber = Util.formatSafetyNumber(m.computeSafetyNumber(verifiedMessage.getDestination(),
 199                                 verifiedMessage.getIdentityKey()));
 200                         System.out.println("   " + safetyNumber);
 201                     }
 202                     if (syncMessage.getConfiguration().isPresent()) {
 203                         System.out.println("Received sync message with configuration:");
 204                         final ConfigurationMessage configurationMessage = syncMessage.getConfiguration().get();
 205                         if (configurationMessage.getReadReceipts().isPresent()) {
 206                             System.out.println(" - Read receipts: " + (
 207                                     configurationMessage.getReadReceipts().get() ? "enabled" : "disabled"
 208                             ));
 209                         }
 210                         if (configurationMessage.getLinkPreviews().isPresent()) {
 211                             System.out.println(" - Link previews: " + (
 212                                     configurationMessage.getLinkPreviews().get() ? "enabled" : "disabled"
 213                             ));
 214                         }
 215                         if (configurationMessage.getTypingIndicators().isPresent()) {
 216                             System.out.println(" - Typing indicators: " + (
 217                                     configurationMessage.getTypingIndicators().get() ? "enabled" : "disabled"
 218                             ));
 219                         }
 220                         if (configurationMessage.getUnidentifiedDeliveryIndicators().isPresent()) {
 221                             System.out.println(" - Unidentified Delivery Indicators: " + (
 222                                     configurationMessage.getUnidentifiedDeliveryIndicators().get()
 223                                             ? "enabled"
 224                                             : "disabled"
 225                             ));
 226                         }
 227                     }
 228                     if (syncMessage.getFetchType().isPresent()) {
 229                         final SignalServiceSyncMessage.FetchType fetchType = syncMessage.getFetchType().get();
 230                         System.out.println("Received sync message with fetch type: " + fetchType.toString());
 231                     }
 232                     if (syncMessage.getViewOnceOpen().isPresent()) {
 233                         final ViewOnceOpenMessage viewOnceOpenMessage = syncMessage.getViewOnceOpen().get();
 234                         System.out.println("Received sync message with view once open message:");
 235                         System.out.println(" - Sender:" + viewOnceOpenMessage.getSender().getLegacyIdentifier());
 236                         System.out.println(" - Timestamp:" + viewOnceOpenMessage.getTimestamp());
 237                     }
 238                     if (syncMessage.getStickerPackOperations().isPresent()) {
 239                         final List<StickerPackOperationMessage> stickerPackOperationMessages = syncMessage.getStickerPackOperations()
 240                                 .get();
 241                         System.out.println("Received sync message with sticker pack operations:");
 242                         for (StickerPackOperationMessage m : stickerPackOperationMessages) {
 243                             System.out.println(" - " + m.getType().toString());
 244                             if (m.getPackId().isPresent()) {
 245                                 System.out.println("   packId: " + Base64.encodeBytes(m.getPackId().get()));
 246                             }
 247                             if (m.getPackKey().isPresent()) {
 248                                 System.out.println("   packKey: " + Base64.encodeBytes(m.getPackKey().get()));
 249                             }
 250                         }
 251                     }
 252                     if (syncMessage.getMessageRequestResponse().isPresent()) {
 253                         final MessageRequestResponseMessage requestResponseMessage = syncMessage.getMessageRequestResponse()
 254                                 .get();
 255                         System.out.println("Received message request response:");
 256                         System.out.println("  Type: " + requestResponseMessage.getType());
 257                         if (requestResponseMessage.getGroupId().isPresent()) {
 258                             System.out.println("  Group id: " + Base64.encodeBytes(requestResponseMessage.getGroupId()
 259                                     .get()));
 260                         }
 261                         if (requestResponseMessage.getPerson().isPresent()) {
 262                             System.out.println("  Person: " + requestResponseMessage.getPerson()
 263                                     .get()
 264                                     .getLegacyIdentifier());
 265                         }
 266                     }
 267                     if (syncMessage.getKeys().isPresent()) {
 268                         final KeysMessage keysMessage = syncMessage.getKeys().get();
 269                         System.out.println("Received sync message with keys:");
 270                         if (keysMessage.getStorageService().isPresent()) {
 271                             System.out.println("  With storage key length: " + keysMessage.getStorageService()
 272                                     .get()
 273                                     .serialize().length);
 274                         } else {
 275                             System.out.println("  With empty storage key");
 276                         }
 277                     }
 278                 }
 279                 if (content.getCallMessage().isPresent()) {
 280                     System.out.println("Received a call message");
 281                     SignalServiceCallMessage callMessage = content.getCallMessage().get();
 282                     if (callMessage.getAnswerMessage().isPresent()) {
 283                         AnswerMessage answerMessage = callMessage.getAnswerMessage().get();
 284                         System.out.println("Answer message: " + answerMessage.getId() + ": " + answerMessage.getSdp());
 285                     }
 286                     if (callMessage.getBusyMessage().isPresent()) {
 287                         BusyMessage busyMessage = callMessage.getBusyMessage().get();
 288                         System.out.println("Busy message: " + busyMessage.getId());
 289                     }
 290                     if (callMessage.getHangupMessage().isPresent()) {
 291                         HangupMessage hangupMessage = callMessage.getHangupMessage().get();
 292                         System.out.println("Hangup message: " + hangupMessage.getId());
 293                     }
 294                     if (callMessage.getIceUpdateMessages().isPresent()) {
 295                         List<IceUpdateMessage> iceUpdateMessages = callMessage.getIceUpdateMessages().get();
 296                         for (IceUpdateMessage iceUpdateMessage : iceUpdateMessages) {
 297                             System.out.println("Ice update message: "
 298                                     + iceUpdateMessage.getId()
 299                                     + ", sdp: "
 300                                     + iceUpdateMessage.getSdp());
 301                         }
 302                     }
 303                     if (callMessage.getOfferMessage().isPresent()) {
 304                         OfferMessage offerMessage = callMessage.getOfferMessage().get();
 305                         System.out.println("Offer message: " + offerMessage.getId() + ": " + offerMessage.getSdp());
 306                     }
 307                 }
 308                 if (content.getReceiptMessage().isPresent()) {
 309                     System.out.println("Received a receipt message");
 310                     SignalServiceReceiptMessage receiptMessage = content.getReceiptMessage().get();
 311                     System.out.println(" - When: " + DateUtils.formatTimestamp(receiptMessage.getWhen()));
 312                     if (receiptMessage.isDeliveryReceipt()) {
 313                         System.out.println(" - Is delivery receipt");
 314                     }
 315                     if (receiptMessage.isReadReceipt()) {
 316                         System.out.println(" - Is read receipt");
 317                     }
 318                     System.out.println(" - Timestamps:");
 319                     for (long timestamp : receiptMessage.getTimestamps()) {
 320                         System.out.println("    " + DateUtils.formatTimestamp(timestamp));
 321                     }
 322                 }
 323                 if (content.getTypingMessage().isPresent()) {
 324                     System.out.println("Received a typing message");
 325                     SignalServiceTypingMessage typingMessage = content.getTypingMessage().get();
 326                     System.out.println(" - Action: " + typingMessage.getAction());
 327                     System.out.println(" - Timestamp: " + DateUtils.formatTimestamp(typingMessage.getTimestamp()));
 328                     if (typingMessage.getGroupId().isPresent()) {
 329                         System.out.println(" - Group Info:");
 330                         System.out.println("   Id: " + Base64.encodeBytes(typingMessage.getGroupId().get()));
 331                         GroupInfo group = m.getGroup(typingMessage.getGroupId().get());
 332                         if (group != null) {
 333                             System.out.println("   Name: " + group.getTitle());
 334                         } else {
 335                             System.out.println("   Name: <Unknown group>");
 336                         }
 337                     }
 338                 }
 339             }
 340         } else {
 341             System.out.println("Unknown message received.");
 342         }
 343         System.out.println();
 344     }
 345
 346     private void handleSignalServiceDataMessage(SignalServiceDataMessage message) {
 347         System.out.println("Message timestamp: " + DateUtils.formatTimestamp(message.getTimestamp()));
 348         if (message.isViewOnce()) {
 349             System.out.println("=VIEW ONCE=");
 350         }
 351
 352         if (message.getBody().isPresent()) {
 353             System.out.println("Body: " + message.getBody().get());
 354         }
 355         if (message.getGroupContext().isPresent()) {
 356             System.out.println("Group info:");
 357             final SignalServiceGroupContext groupContext = message.getGroupContext().get();
 358             if (groupContext.getGroupV1().isPresent()) {
 359                 SignalServiceGroup groupInfo = groupContext.getGroupV1().get();
 360                 System.out.println("  Id: " + Base64.encodeBytes(groupInfo.getGroupId()));
 361                 if (groupInfo.getType() == SignalServiceGroup.Type.UPDATE && groupInfo.getName().isPresent()) {
 362                     System.out.println("  Name: " + groupInfo.getName().get());
 363                 } else {
 364                     GroupInfo group = m.getGroup(groupInfo.getGroupId());
 365                     if (group != null) {
 366                         System.out.println("  Name: " + group.getTitle());
 367                     } else {
 368                         System.out.println("  Name: <Unknown group>");
 369                     }
 370                 }
 371                 System.out.println("  Type: " + groupInfo.getType());
 372                 if (groupInfo.getMembers().isPresent()) {
 373                     for (SignalServiceAddress member : groupInfo.getMembers().get()) {
 374                         System.out.println("  Member: " + member.getLegacyIdentifier());
 375                     }
 376                 }
 377                 if (groupInfo.getAvatar().isPresent()) {
 378                     System.out.println("  Avatar:");
 379                     printAttachment(groupInfo.getAvatar().get());
 380                 }
 381             } else if (groupContext.getGroupV2().isPresent()) {
 382                 final SignalServiceGroupV2 groupInfo = groupContext.getGroupV2().get();
 383                 byte[] groupId = m.getGroupId(groupInfo.getMasterKey());
 384                 System.out.println("  Id: " + Base64.encodeBytes(groupId));
 385                 GroupInfo group = m.getGroup(groupId);
 386                 if (group != null) {
 387                     System.out.println("  Name: " + group.getTitle());
 388                 } else {
 389                     System.out.println("  Name: <Unknown group>");
 390                 }
 391                 System.out.println("  Revision: " + groupInfo.getRevision());
 392                 System.out.println("  Master key length: " + groupInfo.getMasterKey().serialize().length);
 393                 System.out.println("  Has signed group change: " + groupInfo.hasSignedGroupChange());
 394             }
 395         }
 396         if (message.getPreviews().isPresent()) {
 397             final List<SignalServiceDataMessage.Preview> previews = message.getPreviews().get();
 398             System.out.println("Previews:");
 399             for (SignalServiceDataMessage.Preview preview : previews) {
 400                 System.out.println(" - Title: " + preview.getTitle());
 401                 System.out.println(" - Url: " + preview.getUrl());
 402                 if (preview.getImage().isPresent()) {
 403                     printAttachment(preview.getImage().get());
 404                 }
 405             }
 406         }
 407         if (message.getSharedContacts().isPresent()) {
 408             final List<SharedContact> sharedContacts = message.getSharedContacts().get();
 409             System.out.println("Contacts:");
 410             for (SharedContact contact : sharedContacts) {
 411                 System.out.println(" - Name: " + contact.getName());
 412                 // TODO show or store rest of the contact info
 413             }
 414         }
 415         if (message.getSticker().isPresent()) {
 416             final SignalServiceDataMessage.Sticker sticker = message.getSticker().get();
 417             System.out.println("Sticker:");
 418             System.out.println(" - Pack id: " + Base64.encodeBytes(sticker.getPackId()));
 419             System.out.println(" - Pack key: " + Base64.encodeBytes(sticker.getPackKey()));
 420             System.out.println(" - Sticker id: " + sticker.getStickerId());
 421             // TODO also download sticker image ??
 422         }
 423         if (message.isEndSession()) {
 424             System.out.println("Is end session");
 425         }
 426         if (message.isExpirationUpdate()) {
 427             System.out.println("Is Expiration update: " + message.isExpirationUpdate());
 428         }
 429         if (message.getExpiresInSeconds() > 0) {
 430             System.out.println("Expires in: " + message.getExpiresInSeconds() + " seconds");
 431         }
 432         if (message.getProfileKey().isPresent()) {
 433             System.out.println("Profile key update, key length:" + message.getProfileKey().get().length);
 434         }
 435
 436         if (message.getReaction().isPresent()) {
 437             final SignalServiceDataMessage.Reaction reaction = message.getReaction().get();
 438             System.out.println("Reaction:");
 439             System.out.println(" - Emoji: " + reaction.getEmoji());
 440             System.out.println(" - Target author: " + m.resolveSignalServiceAddress(reaction.getTargetAuthor())
 441                     .getLegacyIdentifier());
 442             System.out.println(" - Target timestamp: " + reaction.getTargetSentTimestamp());
 443             System.out.println(" - Is remove: " + reaction.isRemove());
 444         }
 445
 446         if (message.getQuote().isPresent()) {
 447             SignalServiceDataMessage.Quote quote = message.getQuote().get();
 448             System.out.println("Quote: (" + quote.getId() + ")");
 449             System.out.println(" Author: " + quote.getAuthor().getLegacyIdentifier());
 450             System.out.println(" Text: " + quote.getText());
 451             if (quote.getAttachments().size() > 0) {
 452                 System.out.println(" Attachments: ");
 453                 for (SignalServiceDataMessage.Quote.QuotedAttachment attachment : quote.getAttachments()) {
 454                     System.out.println("  Filename: " + attachment.getFileName());
 455                     System.out.println("  Type: " + attachment.getContentType());
 456                     System.out.println("  Thumbnail:");
 457                     if (attachment.getThumbnail() != null) {
 458                         printAttachment(attachment.getThumbnail());
 459                     }
 460                 }
 461             }
 462         }
 463
 464         if (message.getRemoteDelete().isPresent()) {
 465             final SignalServiceDataMessage.RemoteDelete remoteDelete = message.getRemoteDelete().get();
 466             System.out.println("Remote delete message: timestamp = " + remoteDelete.getTargetSentTimestamp());
 467         }
 468         if (message.getMentions().isPresent()) {
 469             final List<SignalServiceDataMessage.Mention> mentions = message.getMentions().get();
 470             System.out.println("Mentions: ");
 471             for (SignalServiceDataMessage.Mention mention : mentions) {
 472                 System.out.println("- "
 473                         + mention.getUuid()
 474                         + ": "
 475                         + mention.getStart()
 476                         + " (length: "
 477                         + mention.getLength()
 478                         + ")");
 479             }
 480         }
 481
 482         if (message.getAttachments().isPresent()) {
 483             System.out.println("Attachments: ");
 484             for (SignalServiceAttachment attachment : message.getAttachments().get()) {
 485                 printAttachment(attachment);
 486             }
 487         }
 488     }
 489
 490     private void printAttachment(SignalServiceAttachment attachment) {
 491         System.out.println("- " + attachment.getContentType() + " (" + (attachment.isPointer() ? "Pointer" : "") + (
 492                 attachment.isStream() ? "Stream" : ""
 493         ) + ")");
 494         if (attachment.isPointer()) {
 495             final SignalServiceAttachmentPointer pointer = attachment.asPointer();
 496             System.out.println("  Id: " + pointer.getRemoteId() + " Key length: " + pointer.getKey().length);
 497             System.out.println("  Filename: " + (
 498                     pointer.getFileName().isPresent() ? pointer.getFileName().get() : "-"
 499             ));
 500             System.out.println("  Size: " + (
 501                     pointer.getSize().isPresent() ? pointer.getSize().get() + " bytes" : "<unavailable>"
 502             ) + (
 503                     pointer.getPreview().isPresent() ? " (Preview is available: "
 504                             + pointer.getPreview().get().length
 505                             + " bytes)" : ""
 506             ));
 507             System.out.println("  Voice note: " + (pointer.getVoiceNote() ? "yes" : "no"));
 508             System.out.println("  Dimensions: " + pointer.getWidth() + "x" + pointer.getHeight());
 509             File file = m.getAttachmentFile(pointer.getRemoteId());
 510             if (file.exists()) {
 511                 System.out.println("  Stored plaintext in: " + file);
 512             }
 513         }
 514     }
 515 }