Partially disable settings for slave devices

Signal/src/Loki/Onboarding/SeedVC.swift

@@ -362,7 +362,9 @@ final class SeedVC : OnboardingBaseViewController, DeviceLinkingModalDelegate {
     
     func handleDeviceLinkAuthorized(_ deviceLink: DeviceLink) {
         linkingRequestMessageSendingTimer?.invalidate()
-        UserDefaults.standard.set(true, forKey: "didUpdateForMainnet")
+        let userDefaults = UserDefaults.standard
+        userDefaults.set(true, forKey: "didUpdateForMainnet")
+        userDefaults.set(deviceLink.master.hexEncodedPublicKey, forKey: "masterDeviceHexEncodedPublicKey")
         onboardingController.verificationDidComplete(fromView: self)
         Analytics.shared.track("Device Linked Successfully")
     }

Signal/src/Loki/Settings/QRCodeModal.swift

@@ -13,7 +13,12 @@ final class QRCodeModal : Modal {
         label.textColor = UIColor.ows_white
         // Image view
         let imageView = UIImageView()
-        let hexEncodedPublicKey = OWSIdentityManager.shared().identityKeyPair()!.hexEncodedPublicKey
+        let hexEncodedPublicKey: String
+        if let masterDeviceHexEncodedPublicKey = UserDefaults.standard.string(forKey: "masterDeviceHexEncodedPublicKey") {
+            hexEncodedPublicKey = masterDeviceHexEncodedPublicKey
+        } else {
+            hexEncodedPublicKey = OWSIdentityManager.shared().identityKeyPair()!.hexEncodedPublicKey
+        }
         let data = hexEncodedPublicKey.data(using: .utf8)
         let filter = CIFilter(name: "CIQRCodeGenerator")!
         filter.setValue(data, forKey: "inputMessage")

Signal/src/ViewControllers/AppSettings/AppSettingsViewController.m

@@ -112,6 +112,8 @@
 
 - (void)updateTableContents
 {
+    NSString *masterDeviceHexEncodedPublicKey = [NSUserDefaults.standardUserDefaults stringForKey:@"masterDeviceHexEncodedPublicKey"];
+    BOOL isMasterDevice = (masterDeviceHexEncodedPublicKey == nil);
     OWSTableContents *contents = [OWSTableContents new];
 
     __weak AppSettingsViewController *weakSelf = self;
@@ -123,14 +125,16 @@
 #endif
 
     OWSTableSection *section = [OWSTableSection new];
-    [section addItem:[OWSTableItem itemWithCustomCellBlock:^{
-        return [weakSelf profileHeaderCell];
+    if (isMasterDevice) {
+        [section addItem:[OWSTableItem itemWithCustomCellBlock:^{
+            return [weakSelf profileHeaderCell];
+        }
+                             customRowHeight:100.f
+                             actionBlock:^{
+                                 [weakSelf showProfile];
+                             }]];
     }
-                         customRowHeight:100.f
-                         actionBlock:^{
-                             [weakSelf showProfile];
-                         }]];
-
+    
     if (OWSSignalService.sharedInstance.isCensorshipCircumventionActive) {
         [section
             addItem:[OWSTableItem disclosureItemWithText:
@@ -244,8 +248,10 @@
 
     [section addItem:[OWSTableItem itemWithTitle:NSLocalizedString(@"Share Public Key", @"") actionBlock:^{ [weakSelf sharePublicKey]; }]];
     [section addItem:[OWSTableItem itemWithTitle:NSLocalizedString(@"Show QR Code", @"") actionBlock:^{ [weakSelf showQRCode]; }]];
-    [section addItem:[OWSTableItem itemWithTitle:NSLocalizedString(@"Link Device", @"") actionBlock:^{ [weakSelf linkDevice]; }]];
-    [section addItem:[OWSTableItem itemWithTitle:NSLocalizedString(@"Show Seed", @"") actionBlock:^{ [weakSelf showSeed]; }]];
+    if (isMasterDevice) {
+        [section addItem:[OWSTableItem itemWithTitle:NSLocalizedString(@"Link Device", @"") actionBlock:^{ [weakSelf linkDevice]; }]];
+        [section addItem:[OWSTableItem itemWithTitle:NSLocalizedString(@"Show Seed", @"") actionBlock:^{ [weakSelf showSeed]; }]];
+    }
     [section addItem:[OWSTableItem itemWithTitle:NSLocalizedString(@"Clear All Data", @"") actionBlock:^{ [weakSelf clearAllData]; }]];
     
     if (TSAccountManager.sharedInstance.isDeregistered) {
@@ -504,7 +510,13 @@
 
 - (void)sharePublicKey
 {
-    NSString *hexEncodedPublicKey = OWSIdentityManager.sharedManager.identityKeyPair.hexEncodedPublicKey;
+    NSString *hexEncodedPublicKey;
+    NSString *masterDeviceHexEncodedPublicKey = [NSUserDefaults.standardUserDefaults stringForKey:@"masterDeviceHexEncodedPublicKey"];
+    if (masterDeviceHexEncodedPublicKey != nil) {
+        hexEncodedPublicKey = masterDeviceHexEncodedPublicKey;
+    } else {
+        hexEncodedPublicKey = OWSIdentityManager.sharedManager.identityKeyPair.hexEncodedPublicKey;
+    }
     UIActivityViewController *shareVC = [[UIActivityViewController alloc] initWithActivityItems:@[ hexEncodedPublicKey ] applicationActivities:nil];
     [self presentViewController:shareVC animated:YES completion:nil];
     [LKAnalytics.shared track:@"Public Key Shared"];

SignalServiceKit/src/Loki/API/LokiAPI.swift

@@ -39,7 +39,9 @@ public final class LokiAPI : NSObject {
         @objc(kind)
         public let objc_kind: String
         
-        public var kind: Kind { return Kind(rawValue: objc_kind)! }
+        public var kind: Kind {
+            return Kind(rawValue: objc_kind)!
+        }
         
         public enum Kind : String { case master, slave }
         

SignalServiceKit/src/Loki/Messaging/SSKProtoEnvelope+Loki.swift

@@ -4,7 +4,7 @@
     @objc public var isGroupChatMessage: Bool {
         do {
             let contentProto = try SSKProtoContent.parseData(self.content!)
-            return contentProto.dataMessage!.group != nil
+            return contentProto.dataMessage?.group != nil
         } catch {
             return false
         }