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

   1 package org.asamk.signal.manager.helper;
   2
   3 import org.asamk.signal.manager.api.AttachmentInvalidException;
   4 import org.asamk.signal.manager.api.GroupId;
   5 import org.asamk.signal.manager.api.GroupIdV1;
   6 import org.asamk.signal.manager.api.GroupIdV2;
   7 import org.asamk.signal.manager.api.GroupInviteLinkUrl;
   8 import org.asamk.signal.manager.api.GroupLinkState;
   9 import org.asamk.signal.manager.api.GroupNotFoundException;
  10 import org.asamk.signal.manager.api.GroupPermission;
  11 import org.asamk.signal.manager.api.GroupSendingNotAllowedException;
  12 import org.asamk.signal.manager.api.InactiveGroupLinkException;
  13 import org.asamk.signal.manager.api.LastGroupAdminException;
  14 import org.asamk.signal.manager.api.NotAGroupMemberException;
  15 import org.asamk.signal.manager.api.Pair;
  16 import org.asamk.signal.manager.api.PendingAdminApprovalException;
  17 import org.asamk.signal.manager.api.SendGroupMessageResults;
  18 import org.asamk.signal.manager.api.SendMessageResult;
  19 import org.asamk.signal.manager.config.ServiceConfig;
  20 import org.asamk.signal.manager.groups.GroupUtils;
  21 import org.asamk.signal.manager.internal.SignalDependencies;
  22 import org.asamk.signal.manager.jobs.SyncStorageJob;
  23 import org.asamk.signal.manager.storage.SignalAccount;
  24 import org.asamk.signal.manager.storage.groups.GroupInfo;
  25 import org.asamk.signal.manager.storage.groups.GroupInfoV1;
  26 import org.asamk.signal.manager.storage.groups.GroupInfoV2;
  27 import org.asamk.signal.manager.storage.recipients.RecipientId;
  28 import org.asamk.signal.manager.util.AttachmentUtils;
  29 import org.asamk.signal.manager.util.IOUtils;
  30 import org.asamk.signal.manager.util.Utils;
  31 import org.signal.libsignal.zkgroup.InvalidInputException;
  32 import org.signal.libsignal.zkgroup.groups.GroupMasterKey;
  33 import org.signal.libsignal.zkgroup.groups.GroupSecretParams;
  34 import org.signal.libsignal.zkgroup.profiles.ProfileKey;
  35 import org.signal.storageservice.protos.groups.GroupChange;
  36 import org.signal.storageservice.protos.groups.local.DecryptedGroup;
  37 import org.signal.storageservice.protos.groups.local.DecryptedGroupChange;
  38 import org.signal.storageservice.protos.groups.local.DecryptedGroupJoinInfo;
  39 import org.slf4j.Logger;
  40 import org.slf4j.LoggerFactory;
  41 import org.whispersystems.signalservice.api.groupsv2.DecryptedGroupHistoryEntry;
  42 import org.whispersystems.signalservice.api.groupsv2.GroupLinkNotActiveException;
  43 import org.whispersystems.signalservice.api.messages.SignalServiceAttachment;
  44 import org.whispersystems.signalservice.api.messages.SignalServiceAttachmentStream;
  45 import org.whispersystems.signalservice.api.messages.SignalServiceDataMessage;
  46 import org.whispersystems.signalservice.api.messages.SignalServiceGroup;
  47 import org.whispersystems.signalservice.api.messages.SignalServiceGroupV2;
  48 import org.whispersystems.signalservice.api.push.DistributionId;
  49 import org.whispersystems.signalservice.api.push.ServiceId;
  50 import org.whispersystems.signalservice.api.push.exceptions.ConflictException;
  51
  52 import java.io.IOException;
  53 import java.io.InputStream;
  54 import java.io.OutputStream;
  55 import java.nio.file.Files;
  56 import java.util.Collection;
  57 import java.util.HashMap;
  58 import java.util.HashSet;
  59 import java.util.List;
  60 import java.util.Objects;
  61 import java.util.Optional;
  62 import java.util.Set;
  63
  64 public class GroupHelper {
  65
  66     private static final Logger logger = LoggerFactory.getLogger(GroupHelper.class);
  67
  68     private final SignalAccount account;
  69     private final SignalDependencies dependencies;
  70     private final Context context;
  71
  72     public GroupHelper(final Context context) {
  73         this.account = context.getAccount();
  74         this.dependencies = context.getDependencies();
  75         this.context = context;
  76     }
  77
  78     public GroupInfo getGroup(GroupId groupId) {
  79         return getGroup(groupId, false);
  80     }
  81
  82     public boolean isGroupBlocked(final GroupId groupId) {
  83         var group = getGroup(groupId);
  84         return group != null && group.isBlocked();
  85     }
  86
  87     public void downloadGroupAvatar(GroupIdV1 groupId, SignalServiceAttachment avatar) {
  88         try {
  89             context.getAvatarStore()
  90                     .storeGroupAvatar(groupId,
  91                             outputStream -> context.getAttachmentHelper().retrieveAttachment(avatar, outputStream));
  92         } catch (IOException e) {
  93             logger.warn("Failed to download avatar for group {}, ignoring: {}", groupId.toBase64(), e.getMessage());
  94         }
  95     }
  96
  97     public Optional<SignalServiceAttachmentStream> createGroupAvatarAttachment(GroupIdV1 groupId) throws IOException {
  98         final var streamDetails = context.getAvatarStore().retrieveGroupAvatar(groupId);
  99         if (streamDetails == null) {
 100             return Optional.empty();
 101         }
 102
 103         return Optional.of(AttachmentUtils.createAttachmentStream(streamDetails, Optional.empty()));
 104     }
 105
 106     public GroupInfoV2 getOrMigrateGroup(
 107             final GroupMasterKey groupMasterKey, final int revision, final byte[] signedGroupChange
 108     ) {
 109         final var groupSecretParams = GroupSecretParams.deriveFromMasterKey(groupMasterKey);
 110
 111         final var groupId = GroupUtils.getGroupIdV2(groupSecretParams);
 112         final var groupInfoV2 = account.getGroupStore().getGroupOrPartialMigrate(groupMasterKey, groupId);
 113
 114         if (groupInfoV2.getGroup() == null || groupInfoV2.getGroup().revision < revision) {
 115             DecryptedGroup group = null;
 116             if (signedGroupChange != null
 117                     && groupInfoV2.getGroup() != null
 118                     && groupInfoV2.getGroup().revision + 1 == revision) {
 119                 final var decryptedGroupChange = context.getGroupV2Helper()
 120                         .getDecryptedGroupChange(signedGroupChange, groupMasterKey);
 121
 122                 if (decryptedGroupChange != null) {
 123                     storeProfileKeyFromChange(decryptedGroupChange);
 124                     group = context.getGroupV2Helper()
 125                             .getUpdatedDecryptedGroup(groupInfoV2.getGroup(), decryptedGroupChange);
 126                 }
 127             }
 128             if (group == null) {
 129                 try {
 130                     group = context.getGroupV2Helper().getDecryptedGroup(groupSecretParams);
 131
 132                     if (group != null) {
 133                         storeProfileKeysFromHistory(groupSecretParams, groupInfoV2, group);
 134                     }
 135                 } catch (NotAGroupMemberException ignored) {
 136                 }
 137             }
 138             if (group != null) {
 139                 storeProfileKeysFromMembers(group);
 140                 final var avatar = group.avatar;
 141                 if (!avatar.isEmpty()) {
 142                     downloadGroupAvatar(groupId, groupSecretParams, avatar);
 143                 }
 144             }
 145             groupInfoV2.setGroup(group);
 146             account.getGroupStore().updateGroup(groupInfoV2);
 147             context.getJobExecutor().enqueueJob(new SyncStorageJob());
 148         }
 149
 150         return groupInfoV2;
 151     }
 152
 153     public Pair<GroupId, SendGroupMessageResults> createGroup(
 154             String name, Set<RecipientId> members, String avatarFile
 155     ) throws IOException, AttachmentInvalidException {
 156         final var selfRecipientId = account.getSelfRecipientId();
 157         if (members != null && members.contains(selfRecipientId)) {
 158             members = new HashSet<>(members);
 159             members.remove(selfRecipientId);
 160         }
 161
 162         final var avatarBytes = readAvatarBytes(avatarFile);
 163         var gv2Pair = context.getGroupV2Helper()
 164                 .createGroup(name == null ? "" : name, members == null ? Set.of() : members, avatarBytes);
 165
 166         if (gv2Pair == null) {
 167             // Failed to create v2 group, creating v1 group instead
 168             var gv1 = new GroupInfoV1(GroupIdV1.createRandom());
 169             gv1.setProfileSharingEnabled(true);
 170             gv1.addMembers(List.of(selfRecipientId));
 171             final var result = updateGroupV1(gv1, name, members, avatarBytes);
 172             return new Pair<>(gv1.getGroupId(), result);
 173         }
 174
 175         final var gv2 = gv2Pair.first();
 176         final var decryptedGroup = gv2Pair.second();
 177
 178         gv2.setGroup(decryptedGroup);
 179         gv2.setProfileSharingEnabled(true);
 180         if (avatarBytes != null) {
 181             context.getAvatarStore()
 182                     .storeGroupAvatar(gv2.getGroupId(), outputStream -> outputStream.write(avatarBytes));
 183         }
 184
 185         account.getGroupStore().updateGroup(gv2);
 186
 187         final var messageBuilder = getGroupUpdateMessageBuilder(gv2, null);
 188
 189         final var result = sendGroupMessage(messageBuilder,
 190                 gv2.getMembersIncludingPendingWithout(selfRecipientId),
 191                 gv2.getDistributionId());
 192         context.getJobExecutor().enqueueJob(new SyncStorageJob());
 193         return new Pair<>(gv2.getGroupId(), result);
 194     }
 195
 196     public SendGroupMessageResults updateGroup(
 197             final GroupId groupId,
 198             final String name,
 199             final String description,
 200             final Set<RecipientId> members,
 201             final Set<RecipientId> removeMembers,
 202             final Set<RecipientId> admins,
 203             final Set<RecipientId> removeAdmins,
 204             final Set<RecipientId> banMembers,
 205             final Set<RecipientId> unbanMembers,
 206             final boolean resetGroupLink,
 207             final GroupLinkState groupLinkState,
 208             final GroupPermission addMemberPermission,
 209             final GroupPermission editDetailsPermission,
 210             final String avatarFile,
 211             final Integer expirationTimer,
 212             final Boolean isAnnouncementGroup
 213     ) throws IOException, GroupNotFoundException, AttachmentInvalidException, NotAGroupMemberException, GroupSendingNotAllowedException {
 214         var group = getGroupForUpdating(groupId);
 215         final var avatarBytes = readAvatarBytes(avatarFile);
 216
 217         SendGroupMessageResults results;
 218         switch (group) {
 219             case GroupInfoV2 gv2 -> {
 220                 try {
 221                     results = updateGroupV2(gv2,
 222                             name,
 223                             description,
 224                             members,
 225                             removeMembers,
 226                             admins,
 227                             removeAdmins,
 228                             banMembers,
 229                             unbanMembers,
 230                             resetGroupLink,
 231                             groupLinkState,
 232                             addMemberPermission,
 233                             editDetailsPermission,
 234                             avatarBytes,
 235                             expirationTimer,
 236                             isAnnouncementGroup);
 237                 } catch (ConflictException e) {
 238                     // Detected conflicting update, refreshing group and trying again
 239                     group = getGroup(groupId, true);
 240                     results = updateGroupV2((GroupInfoV2) group,
 241                             name,
 242                             description,
 243                             members,
 244                             removeMembers,
 245                             admins,
 246                             removeAdmins,
 247                             banMembers,
 248                             unbanMembers,
 249                             resetGroupLink,
 250                             groupLinkState,
 251                             addMemberPermission,
 252                             editDetailsPermission,
 253                             avatarBytes,
 254                             expirationTimer,
 255                             isAnnouncementGroup);
 256                 }
 257             }
 258
 259             case GroupInfoV1 gv1 -> {
 260                 results = updateGroupV1(gv1, name, members, avatarBytes);
 261                 if (expirationTimer != null) {
 262                     setExpirationTimer(gv1, expirationTimer);
 263                 }
 264             }
 265         }
 266         context.getJobExecutor().enqueueJob(new SyncStorageJob());
 267         return results;
 268     }
 269
 270     public void updateGroupProfileKey(GroupIdV2 groupId) throws GroupNotFoundException, NotAGroupMemberException, IOException {
 271         var group = getGroupForUpdating(groupId);
 272
 273         if (group instanceof GroupInfoV2 groupInfoV2) {
 274             Pair<DecryptedGroup, GroupChange> groupChangePair;
 275             try {
 276                 groupChangePair = context.getGroupV2Helper().updateSelfProfileKey(groupInfoV2);
 277             } catch (ConflictException e) {
 278                 // Detected conflicting update, refreshing group and trying again
 279                 groupInfoV2 = (GroupInfoV2) getGroup(groupId, true);
 280                 groupChangePair = context.getGroupV2Helper().updateSelfProfileKey(groupInfoV2);
 281             }
 282             if (groupChangePair != null) {
 283                 sendUpdateGroupV2Message(groupInfoV2, groupChangePair.first(), groupChangePair.second());
 284             }
 285         }
 286     }
 287
 288     public Pair<GroupId, SendGroupMessageResults> joinGroup(
 289             GroupInviteLinkUrl inviteLinkUrl
 290     ) throws IOException, InactiveGroupLinkException, PendingAdminApprovalException {
 291         final DecryptedGroupJoinInfo groupJoinInfo;
 292         try {
 293             groupJoinInfo = context.getGroupV2Helper()
 294                     .getDecryptedGroupJoinInfo(inviteLinkUrl.getGroupMasterKey(), inviteLinkUrl.getPassword());
 295         } catch (GroupLinkNotActiveException e) {
 296             throw new InactiveGroupLinkException("Group link inactive (reason: " + e.getReason() + ")", e);
 297         }
 298         if (groupJoinInfo.pendingAdminApproval) {
 299             throw new PendingAdminApprovalException("You have already requested to join the group.");
 300         }
 301         final var groupChange = context.getGroupV2Helper()
 302                 .joinGroup(inviteLinkUrl.getGroupMasterKey(), inviteLinkUrl.getPassword(), groupJoinInfo);
 303         final var group = getOrMigrateGroup(inviteLinkUrl.getGroupMasterKey(),
 304                 groupJoinInfo.revision + 1,
 305                 groupChange.encode());
 306
 307         if (group.getGroup() == null) {
 308             // Only requested member, can't send update to group members
 309             return new Pair<>(group.getGroupId(), new SendGroupMessageResults(0, List.of()));
 310         }
 311
 312         final var result = sendUpdateGroupV2Message(group, group.getGroup(), groupChange);
 313
 314         context.getJobExecutor().enqueueJob(new SyncStorageJob());
 315         return new Pair<>(group.getGroupId(), result);
 316     }
 317
 318     public SendGroupMessageResults quitGroup(
 319             final GroupId groupId, final Set<RecipientId> newAdmins
 320     ) throws IOException, LastGroupAdminException, NotAGroupMemberException, GroupNotFoundException {
 321         var group = getGroupForUpdating(groupId);
 322         if (group instanceof GroupInfoV1) {
 323             return quitGroupV1((GroupInfoV1) group);
 324         }
 325
 326         try {
 327             return quitGroupV2((GroupInfoV2) group, newAdmins);
 328         } catch (ConflictException e) {
 329             // Detected conflicting update, refreshing group and trying again
 330             group = getGroup(groupId, true);
 331             return quitGroupV2((GroupInfoV2) group, newAdmins);
 332         }
 333     }
 334
 335     public void deleteGroup(GroupId groupId) throws IOException {
 336         account.getGroupStore().deleteGroup(groupId);
 337         context.getAvatarStore().deleteGroupAvatar(groupId);
 338         context.getJobExecutor().enqueueJob(new SyncStorageJob());
 339     }
 340
 341     public void setGroupBlocked(final GroupId groupId, final boolean blocked) throws GroupNotFoundException {
 342         var group = getGroup(groupId);
 343         if (group == null) {
 344             throw new GroupNotFoundException(groupId);
 345         }
 346
 347         group.setBlocked(blocked);
 348         account.getGroupStore().updateGroup(group);
 349         context.getJobExecutor().enqueueJob(new SyncStorageJob());
 350     }
 351
 352     public SendGroupMessageResults sendGroupInfoRequest(
 353             GroupIdV1 groupId, RecipientId recipientId
 354     ) throws IOException {
 355         var group = SignalServiceGroup.newBuilder(SignalServiceGroup.Type.REQUEST_INFO).withId(groupId.serialize());
 356
 357         var messageBuilder = SignalServiceDataMessage.newBuilder().asGroupMessage(group.build());
 358
 359         // Send group info request message to the recipient who sent us a message with this groupId
 360         return sendGroupMessage(messageBuilder, Set.of(recipientId), null);
 361     }
 362
 363     public SendGroupMessageResults sendGroupInfoMessage(
 364             GroupIdV1 groupId, RecipientId recipientId
 365     ) throws IOException, NotAGroupMemberException, GroupNotFoundException, AttachmentInvalidException {
 366         GroupInfoV1 g;
 367         var group = getGroupForUpdating(groupId);
 368         if (!(group instanceof GroupInfoV1)) {
 369             throw new IOException("Received an invalid group request for a v2 group!");
 370         }
 371         g = (GroupInfoV1) group;
 372
 373         if (!g.isMember(recipientId)) {
 374             throw new NotAGroupMemberException(groupId, g.name);
 375         }
 376
 377         var messageBuilder = getGroupUpdateMessageBuilder(g);
 378
 379         // Send group message only to the recipient who requested it
 380         return sendGroupMessage(messageBuilder, Set.of(recipientId), null);
 381     }
 382
 383     private GroupInfo getGroup(GroupId groupId, boolean forceUpdate) {
 384         final var group = account.getGroupStore().getGroup(groupId);
 385         if (group instanceof GroupInfoV2 groupInfoV2) {
 386             if (forceUpdate || (!groupInfoV2.isPermissionDenied() && groupInfoV2.getGroup() == null)) {
 387                 final var groupSecretParams = GroupSecretParams.deriveFromMasterKey(groupInfoV2.getMasterKey());
 388                 DecryptedGroup decryptedGroup;
 389                 try {
 390                     decryptedGroup = context.getGroupV2Helper().getDecryptedGroup(groupSecretParams);
 391                 } catch (NotAGroupMemberException e) {
 392                     groupInfoV2.setPermissionDenied(true);
 393                     decryptedGroup = null;
 394                 }
 395                 if (decryptedGroup != null) {
 396                     try {
 397                         storeProfileKeysFromHistory(groupSecretParams, groupInfoV2, decryptedGroup);
 398                     } catch (NotAGroupMemberException ignored) {
 399                     }
 400                     storeProfileKeysFromMembers(decryptedGroup);
 401                     final var avatar = decryptedGroup.avatar;
 402                     if (!avatar.isEmpty()) {
 403                         downloadGroupAvatar(groupInfoV2.getGroupId(), groupSecretParams, avatar);
 404                     }
 405                 }
 406                 groupInfoV2.setGroup(decryptedGroup);
 407                 account.getGroupStore().updateGroup(group);
 408             }
 409         }
 410         return group;
 411     }
 412
 413     private void downloadGroupAvatar(GroupIdV2 groupId, GroupSecretParams groupSecretParams, String cdnKey) {
 414         try {
 415             context.getAvatarStore()
 416                     .storeGroupAvatar(groupId,
 417                             outputStream -> retrieveGroupV2Avatar(groupSecretParams, cdnKey, outputStream));
 418         } catch (IOException e) {
 419             logger.warn("Failed to download avatar for group {}, ignoring: {}", groupId.toBase64(), e.getMessage());
 420         }
 421     }
 422
 423     private void retrieveGroupV2Avatar(
 424             GroupSecretParams groupSecretParams, String cdnKey, OutputStream outputStream
 425     ) throws IOException {
 426         var groupOperations = dependencies.getGroupsV2Operations().forGroup(groupSecretParams);
 427
 428         var tmpFile = IOUtils.createTempFile();
 429         try (InputStream input = dependencies.getMessageReceiver()
 430                 .retrieveGroupsV2ProfileAvatar(cdnKey, tmpFile, ServiceConfig.AVATAR_DOWNLOAD_FAILSAFE_MAX_SIZE)) {
 431             var encryptedData = IOUtils.readFully(input);
 432
 433             var decryptedData = groupOperations.decryptAvatar(encryptedData);
 434             outputStream.write(decryptedData);
 435         } finally {
 436             try {
 437                 Files.delete(tmpFile.toPath());
 438             } catch (IOException e) {
 439                 logger.warn("Failed to delete received group avatar temp file “{}”, ignoring: {}",
 440                         tmpFile,
 441                         e.getMessage());
 442             }
 443         }
 444     }
 445
 446     private void storeProfileKeysFromMembers(final DecryptedGroup group) {
 447         for (var member : group.members) {
 448             final var serviceId = ServiceId.parseOrThrow(member.aciBytes);
 449             final var recipientId = account.getRecipientResolver().resolveRecipient(serviceId);
 450             final var profileStore = account.getProfileStore();
 451             if (profileStore.getProfileKey(recipientId) != null) {
 452                 // We already have a profile key, not updating it from a non-authoritative source
 453                 continue;
 454             }
 455             try {
 456                 profileStore.storeProfileKey(recipientId, new ProfileKey(member.profileKey.toByteArray()));
 457             } catch (InvalidInputException ignored) {
 458             }
 459         }
 460     }
 461
 462     private void storeProfileKeyFromChange(final DecryptedGroupChange decryptedGroupChange) {
 463         final var profileKeyFromChange = context.getGroupV2Helper()
 464                 .getAuthoritativeProfileKeyFromChange(decryptedGroupChange);
 465
 466         if (profileKeyFromChange != null) {
 467             final var serviceId = profileKeyFromChange.first();
 468             final var profileKey = profileKeyFromChange.second();
 469             final var recipientId = account.getRecipientResolver().resolveRecipient(serviceId);
 470             account.getProfileStore().storeProfileKey(recipientId, profileKey);
 471         }
 472     }
 473
 474     private void storeProfileKeysFromHistory(
 475             final GroupSecretParams groupSecretParams,
 476             final GroupInfoV2 localGroup,
 477             final DecryptedGroup newDecryptedGroup
 478     ) throws NotAGroupMemberException {
 479         final var revisionWeWereAdded = context.getGroupV2Helper().findRevisionWeWereAdded(newDecryptedGroup);
 480         final var localRevision = localGroup.getGroup() == null ? 0 : localGroup.getGroup().revision;
 481         var fromRevision = Math.max(revisionWeWereAdded, localRevision);
 482         final var newProfileKeys = new HashMap<RecipientId, ProfileKey>();
 483         while (true) {
 484             final var page = context.getGroupV2Helper().getDecryptedGroupHistoryPage(groupSecretParams, fromRevision);
 485             page.getResults()
 486                     .stream()
 487                     .map(DecryptedGroupHistoryEntry::getChange)
 488                     .filter(Optional::isPresent)
 489                     .map(Optional::get)
 490                     .map(context.getGroupV2Helper()::getAuthoritativeProfileKeyFromChange)
 491                     .filter(Objects::nonNull)
 492                     .forEach(p -> {
 493                         final var serviceId = p.first();
 494                         final var profileKey = p.second();
 495                         final var recipientId = account.getRecipientResolver().resolveRecipient(serviceId);
 496                         newProfileKeys.put(recipientId, profileKey);
 497                     });
 498             if (!page.getPagingData().hasMorePages()) {
 499                 break;
 500             }
 501             fromRevision = page.getPagingData().getNextPageRevision();
 502         }
 503
 504         newProfileKeys.forEach(account.getProfileStore()::storeProfileKey);
 505     }
 506
 507     private GroupInfo getGroupForUpdating(GroupId groupId) throws GroupNotFoundException, NotAGroupMemberException {
 508         var g = getGroup(groupId);
 509         if (g == null) {
 510             throw new GroupNotFoundException(groupId);
 511         }
 512         if (!g.isMember(account.getSelfRecipientId()) && !g.isPendingMember(account.getSelfRecipientId())) {
 513             throw new NotAGroupMemberException(groupId, g.getTitle());
 514         }
 515         if (groupId instanceof GroupIdV2) {
 516             // Refresh group before updating
 517             return getGroup(groupId, true);
 518         }
 519         return g;
 520     }
 521
 522     private SendGroupMessageResults updateGroupV1(
 523             final GroupInfoV1 gv1, final String name, final Set<RecipientId> members, final byte[] avatarFile
 524     ) throws IOException, AttachmentInvalidException {
 525         updateGroupV1Details(gv1, name, members, avatarFile);
 526
 527         account.getGroupStore().updateGroup(gv1);
 528
 529         var messageBuilder = getGroupUpdateMessageBuilder(gv1);
 530         return sendGroupMessage(messageBuilder,
 531                 gv1.getMembersIncludingPendingWithout(account.getSelfRecipientId()),
 532                 gv1.getDistributionId());
 533     }
 534
 535     private void updateGroupV1Details(
 536             final GroupInfoV1 g, final String name, final Collection<RecipientId> members, final byte[] avatarFile
 537     ) throws IOException {
 538         if (name != null) {
 539             g.name = name;
 540         }
 541
 542         if (members != null) {
 543             g.addMembers(members);
 544         }
 545
 546         if (avatarFile != null) {
 547             context.getAvatarStore().storeGroupAvatar(g.getGroupId(), outputStream -> outputStream.write(avatarFile));
 548         }
 549     }
 550
 551     /**
 552      * Change the expiration timer for a group
 553      */
 554     private void setExpirationTimer(
 555             GroupInfoV1 groupInfoV1, int messageExpirationTimer
 556     ) throws NotAGroupMemberException, GroupNotFoundException, IOException, GroupSendingNotAllowedException {
 557         groupInfoV1.messageExpirationTime = messageExpirationTimer;
 558         account.getGroupStore().updateGroup(groupInfoV1);
 559         sendExpirationTimerUpdate(groupInfoV1.getGroupId());
 560     }
 561
 562     private void sendExpirationTimerUpdate(GroupIdV1 groupId) throws IOException, NotAGroupMemberException, GroupNotFoundException, GroupSendingNotAllowedException {
 563         final var messageBuilder = SignalServiceDataMessage.newBuilder().asExpirationUpdate();
 564         context.getSendHelper().sendAsGroupMessage(messageBuilder, groupId, false, Optional.empty());
 565     }
 566
 567     private SendGroupMessageResults updateGroupV2(
 568             final GroupInfoV2 group,
 569             final String name,
 570             final String description,
 571             final Set<RecipientId> members,
 572             final Set<RecipientId> removeMembers,
 573             final Set<RecipientId> admins,
 574             final Set<RecipientId> removeAdmins,
 575             final Set<RecipientId> banMembers,
 576             final Set<RecipientId> unbanMembers,
 577             final boolean resetGroupLink,
 578             final GroupLinkState groupLinkState,
 579             final GroupPermission addMemberPermission,
 580             final GroupPermission editDetailsPermission,
 581             final byte[] avatarFile,
 582             final Integer expirationTimer,
 583             final Boolean isAnnouncementGroup
 584     ) throws IOException {
 585         SendGroupMessageResults result = null;
 586         final var groupV2Helper = context.getGroupV2Helper();
 587         if (group.isPendingMember(account.getSelfRecipientId())) {
 588             var groupGroupChangePair = groupV2Helper.acceptInvite(group);
 589             result = sendUpdateGroupV2Message(group, groupGroupChangePair.first(), groupGroupChangePair.second());
 590         }
 591
 592         if (members != null) {
 593             final var requestingMembers = new HashSet<>(members);
 594             requestingMembers.retainAll(group.getRequestingMembers());
 595             if (!requestingMembers.isEmpty()) {
 596                 var groupGroupChangePair = groupV2Helper.approveJoinRequestMembers(group, requestingMembers);
 597                 result = sendUpdateGroupV2Message(group, groupGroupChangePair.first(), groupGroupChangePair.second());
 598             }
 599             final var newMembers = new HashSet<>(members);
 600             newMembers.removeAll(group.getMembers());
 601             newMembers.removeAll(group.getRequestingMembers());
 602             if (!newMembers.isEmpty()) {
 603                 var groupGroupChangePair = groupV2Helper.addMembers(group, newMembers);
 604                 result = sendUpdateGroupV2Message(group, groupGroupChangePair.first(), groupGroupChangePair.second());
 605             }
 606         }
 607
 608         if (removeMembers != null) {
 609             var existingRemoveMembers = new HashSet<>(removeMembers);
 610             if (banMembers != null) {
 611                 existingRemoveMembers.addAll(banMembers);
 612             }
 613             existingRemoveMembers.retainAll(group.getMembers());
 614             if (members != null) {
 615                 existingRemoveMembers.removeAll(members);
 616             }
 617             existingRemoveMembers.remove(account.getSelfRecipientId());// self can be removed with sendQuitGroupMessage
 618             if (!existingRemoveMembers.isEmpty()) {
 619                 var groupGroupChangePair = groupV2Helper.removeMembers(group, existingRemoveMembers);
 620                 result = sendUpdateGroupV2Message(group, groupGroupChangePair.first(), groupGroupChangePair.second());
 621             }
 622
 623             var pendingRemoveMembers = new HashSet<>(removeMembers);
 624             pendingRemoveMembers.retainAll(group.getPendingMembers());
 625             if (!pendingRemoveMembers.isEmpty()) {
 626                 var groupGroupChangePair = groupV2Helper.revokeInvitedMembers(group, pendingRemoveMembers);
 627                 result = sendUpdateGroupV2Message(group, groupGroupChangePair.first(), groupGroupChangePair.second());
 628             }
 629             var requestingRemoveMembers = new HashSet<>(removeMembers);
 630             requestingRemoveMembers.retainAll(group.getRequestingMembers());
 631             if (!requestingRemoveMembers.isEmpty()) {
 632                 var groupGroupChangePair = groupV2Helper.refuseJoinRequestMembers(group, requestingRemoveMembers);
 633                 result = sendUpdateGroupV2Message(group, groupGroupChangePair.first(), groupGroupChangePair.second());
 634             }
 635         }
 636
 637         if (admins != null) {
 638             final var newAdmins = new HashSet<>(admins);
 639             newAdmins.retainAll(group.getMembers());
 640             newAdmins.removeAll(group.getAdminMembers());
 641             if (!newAdmins.isEmpty()) {
 642                 for (var admin : newAdmins) {
 643                     var groupGroupChangePair = groupV2Helper.setMemberAdmin(group, admin, true);
 644                     result = sendUpdateGroupV2Message(group,
 645                             groupGroupChangePair.first(),
 646                             groupGroupChangePair.second());
 647                 }
 648             }
 649         }
 650
 651         if (removeAdmins != null) {
 652             final var existingRemoveAdmins = new HashSet<>(removeAdmins);
 653             existingRemoveAdmins.retainAll(group.getAdminMembers());
 654             if (!existingRemoveAdmins.isEmpty()) {
 655                 for (var admin : existingRemoveAdmins) {
 656                     var groupGroupChangePair = groupV2Helper.setMemberAdmin(group, admin, false);
 657                     result = sendUpdateGroupV2Message(group,
 658                             groupGroupChangePair.first(),
 659                             groupGroupChangePair.second());
 660                 }
 661             }
 662         }
 663
 664         if (banMembers != null) {
 665             final var newlyBannedMembers = new HashSet<>(banMembers);
 666             newlyBannedMembers.removeAll(group.getBannedMembers());
 667             if (!newlyBannedMembers.isEmpty()) {
 668                 var groupGroupChangePair = groupV2Helper.banMembers(group, newlyBannedMembers);
 669                 result = sendUpdateGroupV2Message(group, groupGroupChangePair.first(), groupGroupChangePair.second());
 670             }
 671         }
 672
 673         if (unbanMembers != null) {
 674             var existingUnbanMembers = new HashSet<>(unbanMembers);
 675             existingUnbanMembers.retainAll(group.getBannedMembers());
 676             if (!existingUnbanMembers.isEmpty()) {
 677                 var groupGroupChangePair = groupV2Helper.unbanMembers(group, existingUnbanMembers);
 678                 result = sendUpdateGroupV2Message(group, groupGroupChangePair.first(), groupGroupChangePair.second());
 679             }
 680         }
 681
 682         if (resetGroupLink) {
 683             var groupGroupChangePair = groupV2Helper.resetGroupLinkPassword(group);
 684             result = sendUpdateGroupV2Message(group, groupGroupChangePair.first(), groupGroupChangePair.second());
 685         }
 686
 687         if (groupLinkState != null) {
 688             var groupGroupChangePair = groupV2Helper.setGroupLinkState(group, groupLinkState);
 689             result = sendUpdateGroupV2Message(group, groupGroupChangePair.first(), groupGroupChangePair.second());
 690         }
 691
 692         if (addMemberPermission != null) {
 693             var groupGroupChangePair = groupV2Helper.setAddMemberPermission(group, addMemberPermission);
 694             result = sendUpdateGroupV2Message(group, groupGroupChangePair.first(), groupGroupChangePair.second());
 695         }
 696
 697         if (editDetailsPermission != null) {
 698             var groupGroupChangePair = groupV2Helper.setEditDetailsPermission(group, editDetailsPermission);
 699             result = sendUpdateGroupV2Message(group, groupGroupChangePair.first(), groupGroupChangePair.second());
 700         }
 701
 702         if (expirationTimer != null) {
 703             var groupGroupChangePair = groupV2Helper.setMessageExpirationTimer(group, expirationTimer);
 704             result = sendUpdateGroupV2Message(group, groupGroupChangePair.first(), groupGroupChangePair.second());
 705         }
 706
 707         if (isAnnouncementGroup != null) {
 708             var groupGroupChangePair = groupV2Helper.setIsAnnouncementGroup(group, isAnnouncementGroup);
 709             result = sendUpdateGroupV2Message(group, groupGroupChangePair.first(), groupGroupChangePair.second());
 710         }
 711
 712         if (name != null || description != null || avatarFile != null) {
 713             var groupGroupChangePair = groupV2Helper.updateGroup(group, name, description, avatarFile);
 714             if (avatarFile != null) {
 715                 context.getAvatarStore()
 716                         .storeGroupAvatar(group.getGroupId(), outputStream -> outputStream.write(avatarFile));
 717             }
 718             result = sendUpdateGroupV2Message(group, groupGroupChangePair.first(), groupGroupChangePair.second());
 719         }
 720
 721         return result;
 722     }
 723
 724     private SendGroupMessageResults quitGroupV1(final GroupInfoV1 groupInfoV1) throws IOException {
 725         var group = SignalServiceGroup.newBuilder(SignalServiceGroup.Type.QUIT)
 726                 .withId(groupInfoV1.getGroupId().serialize())
 727                 .build();
 728
 729         var messageBuilder = SignalServiceDataMessage.newBuilder().asGroupMessage(group);
 730         groupInfoV1.removeMember(account.getSelfRecipientId());
 731         account.getGroupStore().updateGroup(groupInfoV1);
 732         return sendGroupMessage(messageBuilder,
 733                 groupInfoV1.getMembersIncludingPendingWithout(account.getSelfRecipientId()),
 734                 groupInfoV1.getDistributionId());
 735     }
 736
 737     private SendGroupMessageResults quitGroupV2(
 738             final GroupInfoV2 groupInfoV2, final Set<RecipientId> newAdmins
 739     ) throws LastGroupAdminException, IOException {
 740         final var currentAdmins = groupInfoV2.getAdminMembers();
 741         newAdmins.removeAll(currentAdmins);
 742         newAdmins.retainAll(groupInfoV2.getMembers());
 743         if (currentAdmins.contains(account.getSelfRecipientId())
 744                 && currentAdmins.size() == 1
 745                 && groupInfoV2.getMembers().size() > 1
 746                 && newAdmins.isEmpty()) {
 747             // Last admin can't leave the group, unless she's also the last member
 748             throw new LastGroupAdminException(groupInfoV2.getGroupId(), groupInfoV2.getTitle());
 749         }
 750         final var groupGroupChangePair = context.getGroupV2Helper().leaveGroup(groupInfoV2, newAdmins);
 751         groupInfoV2.setGroup(groupGroupChangePair.first());
 752         account.getGroupStore().updateGroup(groupInfoV2);
 753
 754         var messageBuilder = getGroupUpdateMessageBuilder(groupInfoV2, groupGroupChangePair.second().encode());
 755         return sendGroupMessage(messageBuilder,
 756                 groupInfoV2.getMembersIncludingPendingWithout(account.getSelfRecipientId()),
 757                 groupInfoV2.getDistributionId());
 758     }
 759
 760     private SignalServiceDataMessage.Builder getGroupUpdateMessageBuilder(GroupInfoV1 g) throws AttachmentInvalidException {
 761         var group = SignalServiceGroup.newBuilder(SignalServiceGroup.Type.UPDATE)
 762                 .withId(g.getGroupId().serialize())
 763                 .withName(g.name)
 764                 .withMembers(g.getMembers()
 765                         .stream()
 766                         .map(context.getRecipientHelper()::resolveSignalServiceAddress)
 767                         .toList());
 768
 769         try {
 770             final var attachment = createGroupAvatarAttachment(g.getGroupId());
 771             attachment.ifPresent(group::withAvatar);
 772         } catch (IOException e) {
 773             throw new AttachmentInvalidException(g.getGroupId().toBase64(), e);
 774         }
 775
 776         return SignalServiceDataMessage.newBuilder()
 777                 .asGroupMessage(group.build())
 778                 .withExpiration(g.getMessageExpirationTimer());
 779     }
 780
 781     private SignalServiceDataMessage.Builder getGroupUpdateMessageBuilder(GroupInfoV2 g, byte[] signedGroupChange) {
 782         var group = SignalServiceGroupV2.newBuilder(g.getMasterKey())
 783                 .withRevision(g.getGroup().revision)
 784                 .withSignedGroupChange(signedGroupChange);
 785         return SignalServiceDataMessage.newBuilder()
 786                 .asGroupMessage(group.build())
 787                 .withExpiration(g.getMessageExpirationTimer());
 788     }
 789
 790     private SendGroupMessageResults sendUpdateGroupV2Message(
 791             GroupInfoV2 group, DecryptedGroup newDecryptedGroup, GroupChange groupChange
 792     ) throws IOException {
 793         final var selfRecipientId = account.getSelfRecipientId();
 794         final var members = group.getMembersIncludingPendingWithout(selfRecipientId);
 795         group.setGroup(newDecryptedGroup);
 796         members.addAll(group.getMembersIncludingPendingWithout(selfRecipientId));
 797         account.getGroupStore().updateGroup(group);
 798
 799         final var messageBuilder = getGroupUpdateMessageBuilder(group, groupChange.encode());
 800         return sendGroupMessage(messageBuilder, members, group.getDistributionId());
 801     }
 802
 803     private SendGroupMessageResults sendGroupMessage(
 804             final SignalServiceDataMessage.Builder messageBuilder,
 805             final Set<RecipientId> members,
 806             final DistributionId distributionId
 807     ) throws IOException {
 808         final var timestamp = System.currentTimeMillis();
 809         messageBuilder.withTimestamp(timestamp);
 810         final var results = context.getSendHelper().sendGroupMessage(messageBuilder.build(), members, distributionId);
 811         return new SendGroupMessageResults(timestamp,
 812                 results.stream()
 813                         .map(sendMessageResult -> SendMessageResult.from(sendMessageResult,
 814                                 account.getRecipientResolver(),
 815                                 account.getRecipientAddressResolver()))
 816                         .toList());
 817     }
 818
 819     private byte[] readAvatarBytes(final String avatarFile) throws IOException {
 820         if (avatarFile == null) {
 821             return null;
 822         }
 823         try (final var avatar = Utils.createStreamDetails(avatarFile).first()) {
 824             return IOUtils.readFully(avatar.getStream());
 825         }
 826     }
 827 }