fix group parser

SignalServiceKit/src/Devices/OWSGroupsOutputStream.m

@@ -31,7 +31,7 @@ NS_ASSUME_NONNULL_BEGIN
     if ([OWSBlockingManager.sharedManager isGroupIdBlocked:group.groupId]) {
         [groupBuilder setBlocked:YES];
     }
-
+    /*
     NSData *avatarPng;
     if (group.groupImage) {
         SSKProtoGroupDetailsAvatarBuilder *avatarBuilder = [SSKProtoGroupDetailsAvatar builder];
@@ -47,7 +47,7 @@ NS_ASSUME_NONNULL_BEGIN
         } else {
             [groupBuilder setAvatar:avatarProto];
         }
-    }
+    } */
 
     OWSDisappearingMessagesConfiguration *_Nullable disappearingMessagesConfiguration =
         [OWSDisappearingMessagesConfiguration fetchObjectWithUniqueID:groupThread.uniqueId transaction:transaction];
@@ -70,12 +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/GroupParser.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? SSKProtoGroupDetails.parseData(protoAsData) else { break }
             index += sizeAsInt

SignalServiceKit/src/Messages/OWSMessageManager.m

@@ -1110,7 +1110,7 @@ NS_ASSUME_NONNULL_BEGIN
             GroupParser *parser = [[GroupParser alloc] initWithData:data];
             NSArray<TSGroupModel *> *groupModels = [parser parseGroupModels];
             for (TSGroupModel *groupModel in groupModels) {
-                TSGroupThread *thread = [TSGroupThread getOrCreateThreadWithGroupModel:groupModel];
+                TSGroupThread *thread = [TSGroupThread getOrCreateThreadWithGroupModel:groupModel transaction:transaction];
                 [self establishSessionsWithMembersIfNeeded:groupModel.groupMemberIds forThread:thread transaction:transaction];
             }
         }