Keep things backwards compatible

SessionMessagingKit/Messages/Control Messages/ConfigurationMessage.swift

@@ -12,16 +12,10 @@ public final class ConfigurationMessage : ControlMessage {
 
     public override var isSelfSendValid: Bool { true }
     
-    // MARK: Validation
-    public override var isValid: Bool {
-        guard displayName != nil else { return false }
-        return true
-    }
-    
     // MARK: Initialization
     public override init() { super.init() }
 
-    public init(displayName: String, profilePictureURL: String?, profileKey: Data?, closedGroups: Set<ClosedGroup>, openGroups: Set<String>) {
+    public init(displayName: String?, profilePictureURL: String?, profileKey: Data?, closedGroups: Set<ClosedGroup>, openGroups: Set<String>) {
         super.init()
         self.displayName = displayName
         self.profilePictureURL = profilePictureURL
@@ -61,8 +55,8 @@ public final class ConfigurationMessage : ControlMessage {
     }
 
     public override func toProto(using transaction: YapDatabaseReadWriteTransaction) -> SNProtoContent? {
-        guard let displayName = displayName else { return nil }
-        let configurationProto = SNProtoConfigurationMessage.builder(displayName: displayName)
+        let configurationProto = SNProtoConfigurationMessage.builder()
+        if let displayName = displayName { configurationProto.setDisplayName(displayName) }
         if let profilePictureURL = profilePictureURL { configurationProto.setProfilePicture(profilePictureURL) }
         if let profileKey = profileKey { configurationProto.setProfileKey(profileKey) }
         configurationProto.setClosedGroups(closedGroups.compactMap { $0.toProto() })

SessionMessagingKit/Protos/Generated/SNProto.swift

@@ -3126,15 +3126,18 @@ extension SNProtoConfigurationMessageClosedGroup.SNProtoConfigurationMessageClos
 
     // MARK: - SNProtoConfigurationMessageBuilder
 
-    @objc public class func builder(displayName: String) -> SNProtoConfigurationMessageBuilder {
-        return SNProtoConfigurationMessageBuilder(displayName: displayName)
+    @objc public class func builder() -> SNProtoConfigurationMessageBuilder {
+        return SNProtoConfigurationMessageBuilder()
     }
 
     // asBuilder() constructs a builder that reflects the proto's contents.
     @objc public func asBuilder() -> SNProtoConfigurationMessageBuilder {
-        let builder = SNProtoConfigurationMessageBuilder(displayName: displayName)
+        let builder = SNProtoConfigurationMessageBuilder()
         builder.setClosedGroups(closedGroups)
         builder.setOpenGroups(openGroups)
+        if let _value = displayName {
+            builder.setDisplayName(_value)
+        }
         if let _value = profilePicture {
             builder.setProfilePicture(_value)
         }
@@ -3150,12 +3153,6 @@ extension SNProtoConfigurationMessageClosedGroup.SNProtoConfigurationMessageClos
 
         @objc fileprivate override init() {}
 
-        @objc fileprivate init(displayName: String) {
-            super.init()
-
-            setDisplayName(displayName)
-        }
-
         @objc public func addClosedGroups(_ valueParam: SNProtoConfigurationMessageClosedGroup) {
             var items = proto.closedGroups
             items.append(valueParam.proto)
@@ -3201,12 +3198,20 @@ extension SNProtoConfigurationMessageClosedGroup.SNProtoConfigurationMessageClos
 
     @objc public let closedGroups: [SNProtoConfigurationMessageClosedGroup]
 
-    @objc public let displayName: String
-
     @objc public var openGroups: [String] {
         return proto.openGroups
     }
 
+    @objc public var displayName: String? {
+        guard proto.hasDisplayName else {
+            return nil
+        }
+        return proto.displayName
+    }
+    @objc public var hasDisplayName: Bool {
+        return proto.hasDisplayName
+    }
+
     @objc public var profilePicture: String? {
         guard proto.hasProfilePicture else {
             return nil
@@ -3228,11 +3233,9 @@ extension SNProtoConfigurationMessageClosedGroup.SNProtoConfigurationMessageClos
     }
 
     private init(proto: SessionProtos_ConfigurationMessage,
-                 closedGroups: [SNProtoConfigurationMessageClosedGroup],
-                 displayName: String) {
+                 closedGroups: [SNProtoConfigurationMessageClosedGroup]) {
         self.proto = proto
         self.closedGroups = closedGroups
-        self.displayName = displayName
     }
 
     @objc
@@ -3249,18 +3252,12 @@ extension SNProtoConfigurationMessageClosedGroup.SNProtoConfigurationMessageClos
         var closedGroups: [SNProtoConfigurationMessageClosedGroup] = []
         closedGroups = try proto.closedGroups.map { try SNProtoConfigurationMessageClosedGroup.parseProto($0) }
 
-        guard proto.hasDisplayName else {
-            throw SNProtoError.invalidProtobuf(description: "\(logTag) missing required field: displayName")
-        }
-        let displayName = proto.displayName
-
         // MARK: - Begin Validation Logic for SNProtoConfigurationMessage -
 
         // MARK: - End Validation Logic for SNProtoConfigurationMessage -
 
         let result = SNProtoConfigurationMessage(proto: proto,
-                                                 closedGroups: closedGroups,
-                                                 displayName: displayName)
+                                                 closedGroups: closedGroups)
         return result
     }
 

SessionMessagingKit/Protos/Generated/SessionProtos.pb.swift

@@ -1246,7 +1246,6 @@ struct SessionProtos_ConfigurationMessage {
 
   var openGroups: [String] = []
 
-  /// @required
   var displayName: String {
     get {return _displayName ?? String()}
     set {_displayName = newValue}
@@ -3222,7 +3221,6 @@ extension SessionProtos_ConfigurationMessage: SwiftProtobuf.Message, SwiftProtob
   ]
 
   public var isInitialized: Bool {
-    if self._displayName == nil {return false}
     if !SwiftProtobuf.Internal.areAllInitialized(self.closedGroups) {return false}
     return true
   }

SessionMessagingKit/Protos/SessionProtos.proto

@@ -224,8 +224,7 @@ message ConfigurationMessage {
 
   repeated ClosedGroup closedGroups   = 1;
   repeated string      openGroups     = 2;
-  // @required
-  required string      displayName    = 3;
+  optional string      displayName    = 3;
   optional string      profilePicture = 4;
   optional bytes       profileKey     = 5;
 }