Merge pull request #104 from RyanRory/sync-closed-group

Closed group functionality and synchronisation

Pods

@@ -1 +1 @@
-Subproject commit 2870e676deec6a7ddb931edb6f0284f1f5b36085
+Subproject commit 67dbced37481e0011a3df1397ed57711384a4957

Signal/Signal-Info.plist

@@ -5,9 +5,9 @@
 	<key>BuildDetails</key>
 	<dict>
 		<key>CarthageVersion</key>
-		<string>0.33.0</string>
+		<string>0.34.0</string>
 		<key>OSXVersion</key>
-		<string>10.15.3</string>
+		<string>10.15.2</string>
 		<key>WebRTCCommit</key>
 		<string>1445d719bf05280270e9f77576f80f973fd847f8 M73</string>
 	</dict>

Signal/src/Jobs/ConversationConfigurationSyncOperation.swift

@@ -64,7 +64,7 @@ class ConversationConfigurationSyncOperation: OWSOperation {
         // The current implementation works, but seems wasteful.
         // Does desktop handle single group sync correctly?
         // What does Android do?
-        let syncMessage: OWSSyncGroupsMessage = OWSSyncGroupsMessage()
+        let syncMessage: OWSSyncGroupsMessage = OWSSyncGroupsMessage(groupThread: groupThread)
 
         var dataSource: DataSource?
         self.dbConnection.read { transaction in

Signal/src/Loki/View Controllers/DeviceLinkingModal.swift

@@ -165,7 +165,8 @@ final class DeviceLinkingModal : Modal, DeviceLinkingSessionDelegate {
         let linkingAuthorizationMessage = DeviceLinkingUtilities.getLinkingAuthorizationMessage(for: deviceLink)
         ThreadUtil.enqueue(linkingAuthorizationMessage)
         SSKEnvironment.shared.messageSender.send(linkingAuthorizationMessage, success: {
-            let _ = SSKEnvironment.shared.syncManager.syncAllContacts()
+            let _ = [SSKEnvironment.shared.syncManager.syncAllContacts(),
+                     SSKEnvironment.shared.syncManager.syncAllGroups()]
         }) { _ in
             print("[Loki] Failed to send device link authorization message.")
         }

Signal/src/Loki/View Controllers/NewClosedGroupVC.swift

@@ -168,8 +168,14 @@ final class NewClosedGroupVC : UIViewController, UITableViewDataSource, UITableV
             return showError(title: NSLocalizedString("A closed group cannot have more than 10 members", comment: ""))
         }
         let userHexEncodedPublicKey = getUserHexEncodedPublicKey()
-        let members = [String](selectedContacts) + [ userHexEncodedPublicKey ]
-        let admins = [ userHexEncodedPublicKey ]
+        let storage = OWSPrimaryStorage.shared()
+        var masterHexEncodedPublicKey = ""
+        storage.dbReadConnection.readWrite { transaction in
+            masterHexEncodedPublicKey = storage.getMasterHexEncodedPublicKey(for: userHexEncodedPublicKey, in: transaction) ?? userHexEncodedPublicKey
+        }
+        let members = [String](selectedContacts) + [ masterHexEncodedPublicKey ]
+        let admins = [ masterHexEncodedPublicKey ]
+        
         let groupID = LKGroupUtilities.getEncodedClosedGroupIDAsData(Randomness.generateRandomBytes(kGroupIdLength)!.toHexString())
         let group = TSGroupModel(title: name, memberIds: members, image: nil, groupId: groupID, groupType: .closedGroup, adminIds: admins)
         let thread = TSGroupThread.getOrCreateThread(with: group)

Signal/src/ViewControllers/DebugUI/DebugUISyncMessages.m

@@ -108,20 +108,7 @@ NS_ASSUME_NONNULL_BEGIN
 
 + (void)sendGroupSyncMessage
 {
-    OWSSyncGroupsMessage *syncGroupsMessage = [[OWSSyncGroupsMessage alloc] init];
-    __block DataSource *dataSource;
-    [self.dbConnection readWithBlock:^(YapDatabaseReadTransaction *transaction) {
-        dataSource = [DataSourceValue
-            dataSourceWithSyncMessageData:[syncGroupsMessage buildPlainTextAttachmentDataWithTransaction:transaction]];
-    }];
-
-    [self.messageSenderJobQueue addMediaMessage:syncGroupsMessage
-                                     dataSource:dataSource
-                                    contentType:OWSMimeTypeApplicationOctetStream
-                                 sourceFilename:nil
-                                        caption:nil
-                                 albumMessageId:nil
-                          isTemporaryAttachment:YES];
+    [[self.syncManager syncAllGroups] retainUntilComplete];
 }
 
 + (void)sendBlockListSyncMessage

Signal/src/ViewControllers/ThreadSettings/UpdateGroupViewController.m

@@ -385,7 +385,6 @@ NS_ASSUME_NONNULL_BEGIN
                                                            groupId:self.thread.groupModel.groupId
                                                          groupType:self.thread.groupModel.groupType
                                                           adminIds:self.thread.groupModel.groupAdminIds];
-    groupModel.removedMembers = self.removedRecipientIds;
     [self.conversationSettingsViewDelegate groupWasUpdated:groupModel];
 }
 

SignalMessaging/contacts/OWSSyncManager.m

@@ -16,12 +16,14 @@
 #import <SignalServiceKit/OWSPrimaryStorage.h>
 #import <SignalServiceKit/OWSSyncConfigurationMessage.h>
 #import <SignalServiceKit/OWSSyncContactsMessage.h>
+#import <SignalServiceKit/OWSSyncGroupsMessage.h>
 #import <SignalServiceKit/SSKEnvironment.h>
 #import <SignalServiceKit/SignalAccount.h>
 #import <SignalServiceKit/SignalServiceKit-Swift.h>
 #import <SignalServiceKit/TSAccountManager.h>
 #import <SignalServiceKit/YapDatabaseConnection+OWS.h>
 #import <SignalServiceKit/TSContactThread.h>
+#import <SignalServiceKit/TSGroupThread.h>
 
 NS_ASSUME_NONNULL_BEGIN
 
@@ -280,13 +282,28 @@ NSString *const kSyncManagerLastContactSyncKey = @"kTSStorageManagerOWSSyncManag
 - (AnyPromise *)syncAllContacts
 {
     NSMutableArray<SignalAccount *> *friends = @[].mutableCopy;
+    NSMutableArray<AnyPromise *> *promises = @[].mutableCopy;
     [TSContactThread enumerateCollectionObjectsUsingBlock:^(TSContactThread *thread, BOOL *stop) {
         NSString *hexEncodedPublicKey = thread.contactIdentifier;
-        if (hexEncodedPublicKey != nil && thread.isContactFriend) {
+        if (hexEncodedPublicKey != nil && thread.isContactFriend && thread.shouldThreadBeVisible && !thread.isForceHidden) {
             [friends addObject:[[SignalAccount alloc] initWithRecipientId:hexEncodedPublicKey]];
         }
     }];
-    return [self syncContactsForSignalAccounts:friends];
+    [friends addObject:[[SignalAccount alloc] initWithRecipientId:self.tsAccountManager.localNumber]];
+    NSMutableArray<SignalAccount *> *signalAccounts = @[].mutableCopy;
+    for (SignalAccount *contact in friends) {
+        [signalAccounts addObject:contact];
+        if (signalAccounts.count >= 3) {
+            [promises addObject:[self syncContactsForSignalAccounts:[signalAccounts copy]]];
+            [signalAccounts removeAllObjects];
+        }
+    }
+    if (signalAccounts.count > 0) {
+        [promises addObject:[self syncContactsForSignalAccounts:signalAccounts]];
+    }
+    AnyPromise *promise = PMKJoin(promises);
+    [promise retainUntilComplete];
+    return promise;
 }
 
 - (AnyPromise *)syncContactsForSignalAccounts:(NSArray<SignalAccount *> *)signalAccounts
@@ -307,6 +324,49 @@ NSString *const kSyncManagerLastContactSyncKey = @"kTSStorageManagerOWSSyncManag
     return promise;
 }
 
+- (AnyPromise *)syncAllGroups
+{
+    NSMutableArray<TSGroupThread *> *groupThreads = @[].mutableCopy;
+    NSMutableArray<AnyPromise *> *promises = @[].mutableCopy;
+    [TSGroupThread enumerateCollectionObjectsUsingBlock:^(id obj, BOOL *stop) {
+        if (![obj isKindOfClass:[TSGroupThread class]]) {
+            if (![obj isKindOfClass:[TSContactThread class]]) {
+                OWSLogWarn(@"Ignoring non group thread in thread collection: %@", obj);
+                
+            }
+            return;
+        }
+        TSGroupThread *thread = (TSGroupThread *)obj;
+        if (thread.groupModel.groupType == closedGroup && thread.shouldThreadBeVisible && !thread.isForceHidden) {
+            [groupThreads addObject:thread];
+        }
+    }];
+    for (TSGroupThread *groupThread in groupThreads) {
+        [promises addObject:[self syncGroupForThread:groupThread]];
+    }
+    AnyPromise *promise = PMKJoin(promises);
+    [promise retainUntilComplete];
+    return promise;
+}
+
+- (AnyPromise *)syncGroupForThread:(TSGroupThread *)thread
+{
+    OWSSyncGroupsMessage *syncGroupsMessage = [[OWSSyncGroupsMessage alloc] initWithGroupThread:thread];
+    AnyPromise *promise = [AnyPromise promiseWithResolverBlock:^(PMKResolver resolve) {
+        [self.messageSender sendMessage:syncGroupsMessage
+            success:^{
+                OWSLogInfo(@"Successfully sent groups sync message.");
+                resolve(@(1));
+            }
+            failure:^(NSError *error) {
+                OWSLogError(@"Failed to send groups sync message with error: %@.", error);
+                resolve(error);
+            }];
+    }];
+    [promise retainUntilComplete];
+    return promise;
+}
+
 @end
 
 NS_ASSUME_NONNULL_END

SignalServiceKit/protobuf/SignalService.proto

@@ -319,6 +319,7 @@ message SyncMessage {
 
   message Groups {
     optional AttachmentPointer blob = 1;
+    optional bytes             data = 101; // Loki
   }
 
   message Blocked {
@@ -399,7 +400,7 @@ message GroupContext {
   optional string            name    = 3;
   repeated string            members = 4;
   optional AttachmentPointer avatar  = 5;
-  repeated string            admins  = 6;
+  repeated string            admins  = 6; // Loki
 }
 
 message ContactDetails {
@@ -435,6 +436,7 @@ message GroupDetails {
   optional uint32 expireTimer = 6;
   optional string color       = 7;
   optional bool   blocked     = 8;
+  repeated string admins      = 9;  // Loki
 }
 
 // Internal - DO NOT SEND

SignalServiceKit/src/Contacts/Threads/TSGroupThread.h

@@ -38,6 +38,8 @@ extern NSString *const TSGroupThread_NotificationKey_UniqueId;
 
 - (BOOL)isLocalUserInGroup;
 - (BOOL)isLocalUserInGroupWithTransaction:(YapDatabaseReadTransaction *)transaction;
+- (BOOL)isUserInGroup:(NSString *)hexEncodedPublicKey transaction:(YapDatabaseReadWriteTransaction *)transaction;
+- (BOOL)isUserAdminForGroup:(NSString *)hexEncodedPublicKey transaction:(YapDatabaseReadWriteTransaction *)transaction;
 
 // all group threads containing recipient as a member
 + (NSArray<TSGroupThread *> *)groupThreadsWithRecipientId:(NSString *)recipientId

SignalServiceKit/src/Contacts/Threads/TSGroupThread.m

@@ -204,6 +204,20 @@ NSString *const TSGroupThread_NotificationKey_UniqueId = @"TSGroupThread_Notific
     return [linkedDeviceHexEncodedPublicKeys intersectsSet:[NSSet setWithArray:self.groupModel.groupMemberIds]];
 }
 
+- (BOOL)isUserInGroup:(NSString *)hexEncodedPublicKey transaction:(YapDatabaseReadWriteTransaction *)transaction
+{
+    if (hexEncodedPublicKey == nil) { return NO; }
+    NSSet<NSString *> *linkedDeviceHexEncodedPublicKeys = [LKDatabaseUtilities getLinkedDeviceHexEncodedPublicKeysFor:hexEncodedPublicKey in:transaction];
+    return [linkedDeviceHexEncodedPublicKeys intersectsSet:[NSSet setWithArray:self.groupModel.groupMemberIds]];
+}
+
+- (BOOL)isUserAdminForGroup:(NSString *)hexEncodedPublicKey transaction:(YapDatabaseReadWriteTransaction *)transaction
+{
+    if (hexEncodedPublicKey == nil) { return NO; }
+    NSSet<NSString *> *linkedDeviceHexEncodedPublicKeys = [LKDatabaseUtilities getLinkedDeviceHexEncodedPublicKeysFor:hexEncodedPublicKey in:transaction];
+    return [linkedDeviceHexEncodedPublicKeys intersectsSet:[NSSet setWithArray:self.groupModel.groupAdminIds]];
+}
+
 - (NSString *)name
 {
     // TODO sometimes groupName is set to the empty string. I'm hesitent to change
@@ -227,10 +241,13 @@ NSString *const TSGroupThread_NotificationKey_UniqueId = @"TSGroupThread_Notific
 
 - (void)leaveGroupWithTransaction:(YapDatabaseReadWriteTransaction *)transaction
 {
-    NSMutableArray<NSString *> *newGroupMemberIds = [self.groupModel.groupMemberIds mutableCopy];
-    [newGroupMemberIds removeObject:[TSAccountManager localNumber]];
-
-    self.groupModel.groupMemberIds = newGroupMemberIds;
+    NSMutableSet<NSString *> *newGroupMemberIds = [NSMutableSet setWithArray:self.groupModel.groupMemberIds];
+    NSString *userHexEncodedPublicKey = TSAccountManager.localNumber;
+    if (userHexEncodedPublicKey != nil) {
+        NSSet<NSString *> *linkedDeviceHexEncodedPublicKeys = [LKDatabaseUtilities getLinkedDeviceHexEncodedPublicKeysFor:userHexEncodedPublicKey in:transaction];
+        [newGroupMemberIds minusSet:linkedDeviceHexEncodedPublicKeys];
+    }
+    self.groupModel.groupMemberIds = newGroupMemberIds.allObjects;
     [self saveWithTransaction:transaction];
 }
 

SignalServiceKit/src/Devices/OWSGroupsOutputStream.m

@@ -26,11 +26,12 @@ NS_ASSUME_NONNULL_BEGIN
     [groupBuilder setName:group.groupName];
     [groupBuilder setMembers:group.groupMemberIds];
     [groupBuilder setColor:groupThread.conversationColorName];
+    [groupBuilder setAdmins:group.groupAdminIds];
 
     if ([OWSBlockingManager.sharedManager isGroupIdBlocked:group.groupId]) {
         [groupBuilder setBlocked:YES];
     }
-
+    /*
     NSData *avatarPng;
     if (group.groupImage) {
         SSKProtoGroupDetailsAvatarBuilder *avatarBuilder = [SSKProtoGroupDetailsAvatar builder];
@@ -46,7 +47,7 @@ NS_ASSUME_NONNULL_BEGIN
         } else {
             [groupBuilder setAvatar:avatarProto];
         }
-    }
+    } */
 
     OWSDisappearingMessagesConfiguration *_Nullable disappearingMessagesConfiguration =
         [OWSDisappearingMessagesConfiguration fetchObjectWithUniqueID:groupThread.uniqueId transaction:transaction];
@@ -69,12 +70,12 @@ NS_ASSUME_NONNULL_BEGIN
 
     uint32_t groupDataLength = (uint32_t)groupData.length;
 
-    [self writeVariableLengthUInt32:groupDataLength];
+    [self writeUInt32:groupDataLength];
     [self writeData:groupData];
 
-    if (avatarPng) {
-        [self writeData:avatarPng];
-    }
+//    if (avatarPng) {
+//        [self writeData:avatarPng];
+//    }
 }
 
 @end

SignalServiceKit/src/Loki/Messaging/ContactParser.swift

@@ -17,7 +17,7 @@
             guard let size = uncheckedSize, size < data.count else { break }
             let sizeAsInt = Int(size)
             index += 4
-            guard index + sizeAsInt < data.count else { break }
+            guard index + sizeAsInt <= data.count else { break }
             let protoAsData = data[index..<(index+sizeAsInt)]
             guard let proto = try? SSKProtoContactDetails.parseData(protoAsData) else { break }
             index += sizeAsInt

SignalServiceKit/src/Loki/Messaging/GroupParser.swift

@@ -0,0 +1,34 @@
+
+@objc public final class GroupParser : NSObject {
+    private let data: Data
+    
+    @objc public init(data: Data) {
+        self.data = data
+    }
+    
+    @objc public func parseGroupModels() -> [TSGroupModel] {
+        var index = 0
+        var result: [TSGroupModel] = []
+        while index < data.endIndex {
+            var uncheckedSize: UInt32? = try? data[index..<(index+4)].withUnsafeBytes { $0.pointee }
+            if let size = uncheckedSize, size >= data.count, let intermediate = try? data[index..<(index+4)].reversed() {
+                uncheckedSize = Data(intermediate).withUnsafeBytes { $0.pointee }
+            }
+            guard let size = uncheckedSize, size < data.count else { break }
+            let sizeAsInt = Int(size)
+            index += 4
+            guard index + sizeAsInt <= data.count else { break }
+            let protoAsData = data[index..<(index+sizeAsInt)]
+            guard let proto = try? SSKProtoGroupDetails.parseData(protoAsData) else { break }
+            index += sizeAsInt
+            var groupModel = TSGroupModel.init(title: proto.name,
+                                               memberIds: proto.members,
+                                               image: nil,
+                                               groupId: proto.id,
+                                               groupType: GroupType.closedGroup,
+                                               adminIds: proto.admins)
+            result.append(groupModel)
+        }
+        return result
+    }
+}

SignalServiceKit/src/Messages/DeviceSyncing/OWSIncomingSentMessageTranscript.h

@@ -28,6 +28,7 @@ NS_ASSUME_NONNULL_BEGIN
 @property (nonatomic, readonly) uint64_t expirationStartedAt;
 @property (nonatomic, readonly) uint32_t expirationDuration;
 @property (nonatomic, readonly) BOOL isGroupUpdate;
+@property (nonatomic, readonly) BOOL isGroupQuit;
 @property (nonatomic, readonly) BOOL isExpirationTimerUpdate;
 @property (nonatomic, readonly) BOOL isEndSessionMessage;
 @property (nonatomic, readonly, nullable) NSData *groupId;

SignalServiceKit/src/Messages/DeviceSyncing/OWSIncomingSentMessageTranscript.m

@@ -34,6 +34,7 @@ NS_ASSUME_NONNULL_BEGIN
     _body = _dataMessage.body;
     _groupId = _dataMessage.group.id;
     _isGroupUpdate = _dataMessage.group != nil && (_dataMessage.group.type == SSKProtoGroupContextTypeUpdate);
+    _isGroupQuit = _dataMessage.group != nil && (_dataMessage.group.type == SSKProtoGroupContextTypeQuit);
     _isExpirationTimerUpdate = (_dataMessage.flags & SSKProtoDataMessageFlagsExpirationTimerUpdate) != 0;
     _isEndSessionMessage = (_dataMessage.flags & SSKProtoDataMessageFlagsEndSession) != 0;
     _isRecipientUpdate = sentProto.isRecipientUpdate;

SignalServiceKit/src/Messages/DeviceSyncing/OWSSyncContactsMessage.m

@@ -109,21 +109,6 @@ NS_ASSUME_NONNULL_BEGIN
 - (nullable NSData *)buildPlainTextAttachmentDataWithTransaction:(YapDatabaseReadTransaction *)transaction
 {
     NSMutableArray<SignalAccount *> *signalAccounts = [self.signalAccounts mutableCopy];
-    
-    NSString *_Nullable localNumber = self.tsAccountManager.localNumber;
-    OWSAssertDebug(localNumber);
-    if (localNumber) {
-        BOOL hasLocalNumber = NO;
-        for (SignalAccount *signalAccount in signalAccounts) {
-            hasLocalNumber |= [signalAccount.recipientId isEqualToString:localNumber];
-        }
-        if (!hasLocalNumber) {
-            SignalAccount *signalAccount = [[SignalAccount alloc] initWithRecipientId:localNumber];
-            // OWSContactsOutputStream requires all signalAccount to have a contact.
-            signalAccount.contact = [[Contact alloc] initWithSystemContact:[CNContact new]];
-            [signalAccounts addObject:signalAccount];
-        }
-    }
 
     // TODO use temp file stream to avoid loading everything into memory at once
     // First though, we need to re-engineer our attachment process to accept streams (encrypting with stream,

SignalServiceKit/src/Messages/DeviceSyncing/OWSSyncGroupsMessage.h

@@ -7,10 +7,14 @@
 NS_ASSUME_NONNULL_BEGIN
 
 @class YapDatabaseReadTransaction;
+@class TSGroupThread;
 
 @interface OWSSyncGroupsMessage : OWSOutgoingSyncMessage
 
-- (instancetype)init NS_DESIGNATED_INITIALIZER;
+- (instancetype)init NS_UNAVAILABLE;
+
+- (instancetype)initWithGroupThread:(TSGroupThread *)thread NS_DESIGNATED_INITIALIZER;
+
 - (nullable instancetype)initWithCoder:(NSCoder *)coder NS_DESIGNATED_INITIALIZER;
 
 - (nullable NSData *)buildPlainTextAttachmentDataWithTransaction:(YapDatabaseReadTransaction *)transaction;

SignalServiceKit/src/Messages/DeviceSyncing/OWSSyncGroupsMessage.m

@@ -11,14 +11,28 @@
 #import "TSGroupThread.h"
 #import <SignalCoreKit/NSDate+OWS.h>
 #import <SignalServiceKit/SignalServiceKit-Swift.h>
+#import "OWSPrimaryStorage.h"
 
 NS_ASSUME_NONNULL_BEGIN
 
+@interface OWSSyncGroupsMessage ()
+
+@property (nonatomic, readonly) TSGroupThread *groupThread;
+
+@end
+
 @implementation OWSSyncGroupsMessage
 
-- (instancetype)init
+- (instancetype)initWithGroupThread:(TSGroupThread *)thread
 {
-    return [super init];
+    self = [super init];
+    if (!self) {
+        return self;
+    }
+    
+    _groupThread = thread;
+    
+    return self;
 }
 
 - (nullable instancetype)initWithCoder:(NSCoder *)coder
@@ -28,22 +42,32 @@ NS_ASSUME_NONNULL_BEGIN
 
 - (nullable SSKProtoSyncMessageBuilder *)syncMessageBuilder
 {
-    if (self.attachmentIds.count != 1) {
-        OWSLogError(@"expected sync groups message to have exactly one attachment, but found %lu",
-            (unsigned long)self.attachmentIds.count);
+    NSError *error;
+    if (self.attachmentIds.count > 1) {
+        OWSLogError(@"Expected sync group message to have one or zero attachments, but found %lu.", (unsigned long)self.attachmentIds.count);
     }
-
-    SSKProtoAttachmentPointer *_Nullable attachmentProto =
-        [TSAttachmentStream buildProtoForAttachmentId:self.attachmentIds.firstObject];
-    if (!attachmentProto) {
-        OWSFailDebug(@"could not build protobuf.");
-        return nil;
+    
+    SSKProtoSyncMessageGroupsBuilder *groupsBuilder;
+    if (self.attachmentIds.count == 0) {
+        SSKProtoAttachmentPointerBuilder *attachmentProtoBuilder = [SSKProtoAttachmentPointer builderWithId:0];
+        SSKProtoAttachmentPointer *attachmentProto = [attachmentProtoBuilder buildAndReturnError:&error];
+        groupsBuilder = [SSKProtoSyncMessageGroups builder];
+        [groupsBuilder setBlob:attachmentProto];
+        __block NSData *data;
+        [OWSPrimaryStorage.sharedManager.dbReadConnection readWithBlock:^(YapDatabaseReadTransaction *transaction) {
+            data = [self buildPlainTextAttachmentDataWithTransaction:transaction];
+        }];
+        [groupsBuilder setData:data];
+    } else {
+        SSKProtoAttachmentPointer *attachmentProto = [TSAttachmentStream buildProtoForAttachmentId:self.attachmentIds.firstObject];
+        if (attachmentProto == nil) {
+            OWSFailDebug(@"Couldn't build protobuf.");
+            return nil;
+        }
+        groupsBuilder = [SSKProtoSyncMessageGroups builder];
+        [groupsBuilder setBlob:attachmentProto];
     }
 
-    SSKProtoSyncMessageGroupsBuilder *groupsBuilder = [SSKProtoSyncMessageGroups builder];
-    [groupsBuilder setBlob:attachmentProto];
-
-    NSError *error;
     SSKProtoSyncMessageGroups *_Nullable groupsProto = [groupsBuilder buildAndReturnError:&error];
     if (error || !groupsProto) {
         OWSFailDebug(@"could not build protobuf: %@", error);
@@ -64,21 +88,7 @@ NS_ASSUME_NONNULL_BEGIN
     NSOutputStream *dataOutputStream = [NSOutputStream outputStreamToMemory];
     [dataOutputStream open];
     OWSGroupsOutputStream *groupsOutputStream = [[OWSGroupsOutputStream alloc] initWithOutputStream:dataOutputStream];
-
-    [TSGroupThread
-        enumerateCollectionObjectsWithTransaction:transaction
-                                       usingBlock:^(id obj, BOOL *stop) {
-                                           if (![obj isKindOfClass:[TSGroupThread class]]) {
-                                               if (![obj isKindOfClass:[TSContactThread class]]) {
-                                                   OWSLogWarn(
-                                                       @"Ignoring non group thread in thread collection: %@", obj);
-                                               }
-                                               return;
-                                           }
-                                           TSGroupThread *groupThread = (TSGroupThread *)obj;
-                                           [groupsOutputStream writeGroup:groupThread transaction:transaction];
-                                       }];
-
+    [groupsOutputStream writeGroup:self.groupThread transaction:transaction];
     [dataOutputStream close];
 
     if (groupsOutputStream.hasError) {

SignalServiceKit/src/Messages/OWSMessageManager.m

@@ -1020,6 +1020,14 @@ NS_ASSUME_NONNULL_BEGIN
                                                                           messageType:TSInfoMessageTypeGroupUpdate
                                                                         customMessage:updateMessage];
                 [infoMessage saveWithTransaction:transaction];
+            } else if (transcript.isGroupQuit) {
+                TSGroupThread *groupThread = [TSGroupThread getOrCreateThreadWithGroupId:transcript.dataMessage.group.id groupType:closedGroup transaction:transaction];
+                [groupThread leaveGroupWithTransaction:transaction];
+                TSInfoMessage *infoMessage = [[TSInfoMessage alloc] initWithTimestamp:NSDate.ows_millisecondTimeStamp
+                                                                             inThread:groupThread
+                                                                          messageType:TSInfoMessageTypeGroupQuit
+                                                                        customMessage:NSLocalizedString(@"GROUP_YOU_LEFT", nil)];
+                [infoMessage saveWithTransaction:transaction];
             } else {
                 [OWSRecordTranscriptJob
                  processIncomingSentMessageTranscript:transcript
@@ -1043,20 +1051,9 @@ NS_ASSUME_NONNULL_BEGIN
                 [[self.syncManager syncAllContacts] retainUntilComplete];
             });
         } else if (syncMessage.request.type == SSKProtoSyncMessageRequestTypeGroups) {
-            OWSSyncGroupsMessage *syncGroupsMessage = [[OWSSyncGroupsMessage alloc] init];
-            NSData *_Nullable syncData = [syncGroupsMessage buildPlainTextAttachmentDataWithTransaction:transaction];
-            if (!syncData) {
-                OWSFailDebug(@"Failed to serialize groups sync message.");
-                return;
-            }
-            DataSource *dataSource = [DataSourceValue dataSourceWithSyncMessageData:syncData];
-            [self.messageSenderJobQueue addMediaMessage:syncGroupsMessage
-                                             dataSource:dataSource
-                                            contentType:OWSMimeTypeApplicationOctetStream
-                                         sourceFilename:nil
-                                                caption:nil
-                                         albumMessageId:nil
-                                  isTemporaryAttachment:YES];
+            dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
+                [[self.syncManager syncAllGroups] retainUntilComplete];
+            });
         } else if (syncMessage.request.type == SSKProtoSyncMessageRequestTypeBlocked) {
             OWSLogInfo(@"Received request for block list");
             [self.blockingManager syncBlockList];
@@ -1080,7 +1077,7 @@ NS_ASSUME_NONNULL_BEGIN
         [self.identityManager throws_processIncomingSyncMessage:syncMessage.verified transaction:transaction];
     } else if (syncMessage.contacts != nil) {
         if (wasSentByMasterDevice && syncMessage.contacts.data.length > 0) {
-            NSLog(@"[Loki] Received contact sync message.");
+            OWSLogInfo(@"[Loki] Received contact sync message.");
             NSData *data = syncMessage.contacts.data;
             ContactParser *parser = [[ContactParser alloc] initWithData:data];
             NSArray<NSString *> *hexEncodedPublicKeys = [parser parseHexEncodedPublicKeys];
@@ -1091,10 +1088,8 @@ NS_ASSUME_NONNULL_BEGIN
                 switch (friendRequestStatus) {
                     case LKThreadFriendRequestStatusNone: {
                         OWSMessageSender *messageSender = SSKEnvironment.shared.messageSender;
-                        OWSMessageSend *automatedFriendRequestMessage = [messageSender getMultiDeviceFriendRequestMessageForHexEncodedPublicKey:hexEncodedPublicKey];
-                        dispatch_async(OWSDispatch.sendingQueue, ^{
-                            [messageSender sendMessage:automatedFriendRequestMessage];
-                        });
+                        LKFriendRequestMessage *automatedFriendRequestMessage = [messageSender getMultiDeviceFriendRequestMessageForHexEncodedPublicKey:hexEncodedPublicKey inThread:thread transaction:transaction];
+                        [self.messageSenderJobQueue addMessage:automatedFriendRequestMessage transaction:transaction];
                         break;
                     }
                     case LKThreadFriendRequestStatusRequestReceived: {
@@ -1108,6 +1103,26 @@ NS_ASSUME_NONNULL_BEGIN
                 }
             }
         }
+    } else if (syncMessage.groups != nil) {
+        if (wasSentByMasterDevice && syncMessage.groups.data.length > 0) {
+            OWSLogInfo(@"[Loki] Received group sync message.");
+            NSData *data = syncMessage.groups.data;
+            GroupParser *parser = [[GroupParser alloc] initWithData:data];
+            NSArray<TSGroupModel *> *groupModels = [parser parseGroupModels];
+            for (TSGroupModel *groupModel in groupModels) {
+                TSGroupThread *thread = [TSGroupThread threadWithGroupId:groupModel.groupId transaction:transaction];
+                if (thread == nil) {
+                    thread = [TSGroupThread getOrCreateThreadWithGroupModel:groupModel transaction:transaction];
+                    [thread saveWithTransaction:transaction];
+                    [self establishSessionsWithMembersIfNeeded:groupModel.groupMemberIds forThread:thread transaction:transaction];
+                    TSInfoMessage *infoMessage = [[TSInfoMessage alloc] initWithTimestamp:NSDate.ows_millisecondTimeStamp
+                                                                                 inThread:thread
+                                                                              messageType:TSInfoMessageTypeGroupUpdate
+                                                                            customMessage:@"You have joined the group."];
+                    [infoMessage saveWithTransaction:transaction];
+                }
+            }
+        }
     } else {
         OWSLogWarn(@"Ignoring unsupported sync message.");
     }
@@ -1325,7 +1340,7 @@ NS_ASSUME_NONNULL_BEGIN
     }
 
     // Ensure sender is in the group.
-    if (![gThread.groupModel.groupMemberIds containsObject:envelope.source]) {
+    if (![gThread isUserInGroup:envelope.source transaction:transaction]) {
         OWSLogWarn(@"Ignoring 'Request Group Info' message for non-member of group. %@ not in %@",
             envelope.source,
             gThread.groupModel.groupMemberIds);
@@ -1439,7 +1454,7 @@ NS_ASSUME_NONNULL_BEGIN
 
         switch (dataMessage.group.type) {
             case SSKProtoGroupContextTypeUpdate: {
-                if (oldGroupThread && ![oldGroupThread.groupModel.groupAdminIds containsObject:hexEncodedPublicKey]) {
+                if (oldGroupThread && ![oldGroupThread isUserAdminForGroup:hexEncodedPublicKey transaction:transaction]) {
                     [LKLogger print:[NSString stringWithFormat:@"[Loki] Received a group update from a non-admin user for %@; ignoring.", [LKGroupUtilities getEncodedGroupID:groupId]]];
                     return nil;
                 }

SignalServiceKit/src/Messages/OWSMessageSender.h

@@ -3,6 +3,8 @@
 //
 
 #import "DataSource.h"
+#import "TSContactThread.h"
+#import "LKFriendRequestMessage.h"
 
 NS_ASSUME_NONNULL_BEGIN
 
@@ -98,6 +100,7 @@ NS_SWIFT_NAME(MessageSender)
                         failure:(void (^)(NSError *error))failureHandler;
 
 - (OWSMessageSend *)getSessionRestoreMessageForHexEncodedPublicKey:(NSString *)hexEncodedPublicKey;
+- (LKFriendRequestMessage *)getMultiDeviceFriendRequestMessageForHexEncodedPublicKey:(NSString *)hexEncodedPublicKey inThread:(TSContactThread *)thread transaction:(YapDatabaseReadWriteTransaction *)transaction;
 - (OWSMessageSend *)getMultiDeviceFriendRequestMessageForHexEncodedPublicKey:(NSString *)hexEncodedPublicKey;
 - (void)sendMessage:(OWSMessageSend *)messageSend;
 

SignalServiceKit/src/Messages/OWSMessageSender.m

@@ -937,6 +937,23 @@ NSString *const OWSMessageSenderRateLimitedException = @"RateLimitedException";
     return [[OWSMessageSend alloc] initWithMessage:message thread:thread recipient:recipient senderCertificate:senderCertificate udAccess:theirUDAccess localNumber:userHexEncodedPublicKey success:^{ } failure:^(NSError *error) { }];
 }
 
+- (LKFriendRequestMessage *)getMultiDeviceFriendRequestMessageForHexEncodedPublicKey:(NSString *)hexEncodedPublicKey inThread:(TSContactThread *)thread transaction:(YapDatabaseReadWriteTransaction *)transaction
+{
+    thread = [TSContactThread getOrCreateThreadWithContactId:hexEncodedPublicKey transaction:transaction];
+    // Force hide slave device thread
+    NSString *masterHexEncodedPublicKey = [LKDatabaseUtilities getMasterHexEncodedPublicKeyFor:hexEncodedPublicKey in:transaction];
+    thread.isForceHidden = masterHexEncodedPublicKey != nil && ![masterHexEncodedPublicKey isEqualToString:hexEncodedPublicKey];
+    if (thread.friendRequestStatus == LKThreadFriendRequestStatusNone || thread.friendRequestStatus == LKThreadFriendRequestStatusRequestExpired) {
+        [thread saveFriendRequestStatus:LKThreadFriendRequestStatusRequestSent withTransaction:transaction];
+    }
+    [thread saveWithTransaction:transaction];
+    LKFriendRequestMessage *message = [[LKFriendRequestMessage alloc] initOutgoingMessageWithTimestamp:NSDate.ows_millisecondTimeStamp inThread:thread messageBody:@"Please accept to enable messages to be synced across devices" attachmentIds:[NSMutableArray new]
+           expiresInSeconds:0 expireStartedAt:0 isVoiceMessage:NO groupMetaMessage:TSGroupMetaMessageUnspecified quotedMessage:nil contactShare:nil linkPreview:nil];
+    message.skipSave = YES;
+    [message saveWithTransaction:transaction];
+    return message;
+}
+
 - (OWSMessageSend *)getMultiDeviceFriendRequestMessageForHexEncodedPublicKey:(NSString *)hexEncodedPublicKey
 {
     __block TSContactThread *thread;

SignalServiceKit/src/Protos/Generated/SSKProto.swift

@@ -4551,6 +4551,9 @@ extension SSKProtoSyncMessageContacts.SSKProtoSyncMessageContactsBuilder {
         if let _value = blob {
             builder.setBlob(_value)
         }
+        if let _value = data {
+            builder.setData(_value)
+        }
         return builder
     }
 
@@ -4563,6 +4566,10 @@ extension SSKProtoSyncMessageContacts.SSKProtoSyncMessageContactsBuilder {
         @objc public func setBlob(_ valueParam: SSKProtoAttachmentPointer) {
             proto.blob = valueParam.proto
         }
+        
+        @objc public func setData(_ valueParam: Data) {
+            proto.data = valueParam
+        }
 
         @objc public func build() throws -> SSKProtoSyncMessageGroups {
             return try SSKProtoSyncMessageGroups.parseProto(proto)
@@ -4576,6 +4583,16 @@ extension SSKProtoSyncMessageContacts.SSKProtoSyncMessageContactsBuilder {
     fileprivate let proto: SignalServiceProtos_SyncMessage.Groups
 
     @objc public let blob: SSKProtoAttachmentPointer?
+    
+    @objc public var data: Data? {
+        guard proto.hasData else {
+            return nil
+        }
+        return proto.data
+    }
+    @objc public var hasData: Bool {
+        return proto.hasData
+    }
 
     private init(proto: SignalServiceProtos_SyncMessage.Groups,
                  blob: SSKProtoAttachmentPointer?) {
@@ -6343,6 +6360,16 @@ extension SSKProtoGroupDetailsAvatar.SSKProtoGroupDetailsAvatarBuilder {
         @objc public func setMembers(_ wrappedItems: [String]) {
             proto.members = wrappedItems
         }
+        
+        @objc public func addAdmins(_ valueParam: String) {
+            var items = proto.admins
+            items.append(valueParam)
+            proto.admins = items
+        }
+        
+        @objc public func setAdmins(_ wrappedItems: [String]) {
+            proto.admins = wrappedItems
+        }
 
         @objc public func setAvatar(_ valueParam: SSKProtoGroupDetailsAvatar) {
             proto.avatar = valueParam.proto
@@ -6392,6 +6419,10 @@ extension SSKProtoGroupDetailsAvatar.SSKProtoGroupDetailsAvatarBuilder {
     @objc public var members: [String] {
         return proto.members
     }
+    
+    @objc public var admins: [String] {
+        return proto.admins
+    }
 
     @objc public var active: Bool {
         return proto.active

SignalServiceKit/src/Protos/Generated/SignalService.pb.swift

@@ -1945,6 +1945,16 @@ struct SignalServiceProtos_SyncMessage {
     var hasBlob: Bool {return _storage._blob != nil}
     /// Clears the value of `blob`. Subsequent reads from it will return its default value.
     mutating func clearBlob() {_uniqueStorage()._blob = nil}
+    
+    /// Loki
+    var data: Data {
+      get {return _storage._data ?? SwiftProtobuf.Internal.emptyData}
+      set {_uniqueStorage()._data = newValue}
+    }
+    /// Returns true if `data` has been explicitly set.
+    var hasData: Bool {return _storage._data != nil}
+    /// Clears the value of `data`. Subsequent reads from it will return its default value.
+    mutating func clearData() {_uniqueStorage()._data = nil}
 
     var unknownFields = SwiftProtobuf.UnknownStorage()
 
@@ -2534,6 +2544,12 @@ struct SignalServiceProtos_GroupDetails {
     get {return _storage._members}
     set {_uniqueStorage()._members = newValue}
   }
+  
+  ///Loki
+  var admins: [String] {
+    get {return _storage._admins}
+    set {_uniqueStorage()._admins = newValue}
+  }
 
   var avatar: SignalServiceProtos_GroupDetails.Avatar {
     get {return _storage._avatar ?? SignalServiceProtos_GroupDetails.Avatar()}
@@ -4627,10 +4643,12 @@ extension SignalServiceProtos_SyncMessage.Groups: SwiftProtobuf.Message, SwiftPr
   static let protoMessageName: String = SignalServiceProtos_SyncMessage.protoMessageName + ".Groups"
   static let _protobuf_nameMap: SwiftProtobuf._NameMap = [
     1: .same(proto: "blob"),
+    101: .same(proto: "data"),
   ]
 
   fileprivate class _StorageClass {
     var _blob: SignalServiceProtos_AttachmentPointer? = nil
+    var _data: Data? = nil
 
     static let defaultInstance = _StorageClass()
 
@@ -4638,6 +4656,7 @@ extension SignalServiceProtos_SyncMessage.Groups: SwiftProtobuf.Message, SwiftPr
 
     init(copying source: _StorageClass) {
       _blob = source._blob
+      _data = source._data
     }
   }
 
@@ -4654,6 +4673,7 @@ extension SignalServiceProtos_SyncMessage.Groups: SwiftProtobuf.Message, SwiftPr
       while let fieldNumber = try decoder.nextFieldNumber() {
         switch fieldNumber {
         case 1: try decoder.decodeSingularMessageField(value: &_storage._blob)
+        case 101: try decoder.decodeSingularBytesField(value: &_storage._data)
         default: break
         }
       }
@@ -4665,6 +4685,9 @@ extension SignalServiceProtos_SyncMessage.Groups: SwiftProtobuf.Message, SwiftPr
       if let v = _storage._blob {
         try visitor.visitSingularMessageField(value: v, fieldNumber: 1)
       }
+      if let v = _storage._data {
+        try visitor.visitSingularBytesField(value: v, fieldNumber: 101)
+      }
     }
     try unknownFields.traverse(visitor: &visitor)
   }
@@ -4675,6 +4698,7 @@ extension SignalServiceProtos_SyncMessage.Groups: SwiftProtobuf.Message, SwiftPr
         let _storage = _args.0
         let rhs_storage = _args.1
         if _storage._blob != rhs_storage._blob {return false}
+        if _storage._data != rhs_storage._data {return false}
         return true
       }
       if !storagesAreEqual {return false}
@@ -5223,6 +5247,7 @@ extension SignalServiceProtos_GroupDetails: SwiftProtobuf.Message, SwiftProtobuf
     6: .same(proto: "expireTimer"),
     7: .same(proto: "color"),
     8: .same(proto: "blocked"),
+    9: .same(proto: "admins"),
   ]
 
   fileprivate class _StorageClass {
@@ -5234,6 +5259,7 @@ extension SignalServiceProtos_GroupDetails: SwiftProtobuf.Message, SwiftProtobuf
     var _expireTimer: UInt32? = nil
     var _color: String? = nil
     var _blocked: Bool? = nil
+    var _admins: [String] = []
 
     static let defaultInstance = _StorageClass()
 
@@ -5248,6 +5274,7 @@ extension SignalServiceProtos_GroupDetails: SwiftProtobuf.Message, SwiftProtobuf
       _expireTimer = source._expireTimer
       _color = source._color
       _blocked = source._blocked
+      _admins = source._admins
     }
   }
 
@@ -5271,6 +5298,7 @@ extension SignalServiceProtos_GroupDetails: SwiftProtobuf.Message, SwiftProtobuf
         case 6: try decoder.decodeSingularUInt32Field(value: &_storage._expireTimer)
         case 7: try decoder.decodeSingularStringField(value: &_storage._color)
         case 8: try decoder.decodeSingularBoolField(value: &_storage._blocked)
+        case 9: try decoder.decodeRepeatedStringField(value: &_storage._admins)
         default: break
         }
       }
@@ -5303,6 +5331,9 @@ extension SignalServiceProtos_GroupDetails: SwiftProtobuf.Message, SwiftProtobuf
       if let v = _storage._blocked {
         try visitor.visitSingularBoolField(value: v, fieldNumber: 8)
       }
+      if !_storage._admins.isEmpty {
+        try visitor.visitRepeatedStringField(value: _storage._admins, fieldNumber: 9)
+      }
     }
     try unknownFields.traverse(visitor: &visitor)
   }
@@ -5320,6 +5351,7 @@ extension SignalServiceProtos_GroupDetails: SwiftProtobuf.Message, SwiftProtobuf
         if _storage._expireTimer != rhs_storage._expireTimer {return false}
         if _storage._color != rhs_storage._color {return false}
         if _storage._blocked != rhs_storage._blocked {return false}
+        if _storage._admins != rhs_storage._admins {return false}
         return true
       }
       if !storagesAreEqual {return false}

SignalServiceKit/src/TestUtils/OWSMockSyncManager.swift

@@ -9,6 +9,12 @@ import PromiseKit
 
 @objc
 public class OWSMockSyncManager: NSObject, OWSSyncManagerProtocol {
+    public func syncAllGroups() -> AnyPromise {
+        Logger.info("")
+
+        return AnyPromise()
+    }
+    
 
     @objc public func sendConfigurationSyncMessage() {
         Logger.info("")

SignalServiceKit/src/Util/OWSSyncManagerProtocol.h

@@ -20,6 +20,8 @@ NS_ASSUME_NONNULL_BEGIN
 
 - (AnyPromise *)syncContactsForSignalAccounts:(NSArray<SignalAccount *> *)signalAccounts __attribute__((warn_unused_result));
 
+- (AnyPromise *)syncAllGroups __attribute__((warn_unused_result));
+
 @end
 
 NS_ASSUME_NONNULL_END