Add capability support on quick restore QR codes.

app/src/main/java/org/thoughtcrime/securesms/mediasend/v3/MediaSendV3QrRepository.kt

@@ -50,6 +50,11 @@ object MediaSendV3QrRepository : MediaSendQrRepository {
   }
 
   private fun handleReReg(qrData: String): MediaSendQrRepository.QrCheckResult {
-    return MediaSendQrRepository.QrCheckResult.ReRegistration(qrData)
+    return if (QuickRegistrationRepository.isNewDeviceCompatible(qrData)) {
+      MediaSendQrRepository.QrCheckResult.ReRegistration(qrData)
+    } else {
+      Log.w(TAG, "New device cannot accept a phone-numberless account")
+      MediaSendQrRepository.QrCheckResult.ReRegistrationOutdatedDevice
+    }
   }
 }

app/src/main/java/org/thoughtcrime/securesms/registration/data/QuickRegistrationRepository.kt

@@ -48,6 +48,26 @@ object QuickRegistrationRepository {
     return uri.host == REREG_URI_HOST && ephemeralId.isNotNullOrBlank() && publicKeyEncoded.isNotNullOrBlank()
   }
 
+  /**
+   * Whether the new device that generated [data] can handle this account. A phone-numberless account can only be
+   * transferred to a new device that advertises [Capability.Numberless].
+   */
+  fun isNewDeviceCompatible(data: String): Boolean {
+    if (!SignalStore.account.isPhoneNumberless) {
+      return true
+    }
+
+    return Capability.Numberless in Uri.parse(data).getCapabilities()
+  }
+
+  private fun Uri.getCapabilities(): Set<Capability> {
+    return this.getQueryParameter("capabilities")
+      ?.split(",")
+      ?.mapNotNull { value -> Capability.entries.firstOrNull { it.value == value } }
+      ?.toSet()
+      ?: emptySet()
+  }
+
   /**
    * Send registration provisioning message to new device.
    */
@@ -57,6 +77,11 @@ object QuickRegistrationRepository {
       return TransferAccountResult.FAILED
     }
 
+    if (!isNewDeviceCompatible(reRegisterUri)) {
+      Log.w(TAG, "New device cannot accept a phone-numberless account")
+      return TransferAccountResult.NEW_DEVICE_OUTDATED
+    }
+
     val uri = Uri.parse(reRegisterUri)
 
     try {
@@ -165,6 +190,11 @@ object QuickRegistrationRepository {
 
   enum class TransferAccountResult {
     SUCCESS,
-    FAILED
+    FAILED,
+    NEW_DEVICE_OUTDATED
+  }
+
+  private enum class Capability(val value: String) {
+    Numberless("nopni")
   }
 }

app/src/main/java/org/thoughtcrime/securesms/registration/olddevice/transferaccount/TransferScreen.kt

@@ -131,6 +131,14 @@ fun TransferAccountScreen(
         )
       }
 
+      QuickRegistrationRepository.TransferAccountResult.NEW_DEVICE_OUTDATED -> {
+        Dialogs.SimpleMessageDialog(
+          message = stringResource(R.string.TransferAccount_the_device_you_are_transferring_to_is_out_of_date),
+          dismiss = stringResource(android.R.string.ok),
+          onDismiss = { emitter(TransferScreenEvents.ErrorDialogDismissed) }
+        )
+      }
+
       null -> Unit
     }
   }

app/src/main/res/values/strings.xml

@@ -9021,6 +9021,8 @@
     <string name="TransferAccount_continue_on_your_other_device">Continue on your other device</string>
     <!-- Old device Transfer account bottom sheet dialog body -->
     <string name="TransferAccount_continue_on_your_other_device_details">Continue transferring your account on your other device.</string>
+    <!-- Old device Transfer account error dialog body shown when the new device is too old to accept an account that has no phone number -->
+    <string name="TransferAccount_the_device_you_are_transferring_to_is_out_of_date">The device you\'re transferring to is out of date. Update Signal on that device and try again.</string>
 
     <!-- Prepare Device screen title for quick restore flow -->
     <string name="PrepareDevice_title">Getting your device ready</string>

feature/media-send/src/main/java/org/signal/mediasend/MediaSendFlowViewModel.kt

@@ -125,6 +125,7 @@ class MediaSendFlowViewModel(
 
   internal val usernameScannedDialog = DialogController<String>()
   internal val linkedDeviceScannedDialog = DialogController<Unit>()
+  internal val reRegistrationOutdatedDeviceDialog = DialogController<Unit>()
   internal val discardMediaDialog = DialogController<Unit>()
   internal val addToGroupStoryDialog = DialogController<MediaRecipientId>()
 
@@ -189,6 +190,7 @@ class MediaSendFlowViewModel(
           }
           MediaSendQrRepository.QrCheckResult.None -> Unit
           is MediaSendQrRepository.QrCheckResult.ReRegistration -> sendHudCommand(MediaSendFlowHudCommand.GoToQuickTransfer(qrData))
+          MediaSendQrRepository.QrCheckResult.ReRegistrationOutdatedDevice -> reRegistrationOutdatedDeviceDialog.show(Unit)
           is MediaSendQrRepository.QrCheckResult.Username -> {
             when (usernameScannedDialog.show(result.username)) {
               DialogResult.POSITIVE -> sendHudCommand(MediaSendFlowHudCommand.GoToConversation(result.recipientId))

feature/media-send/src/main/java/org/signal/mediasend/MediaSendQrRepository.kt

@@ -13,5 +13,8 @@ interface MediaSendQrRepository {
     data class Username(val recipientId: MediaRecipientId, val username: String) : QrCheckResult
     data object LinkDevice : QrCheckResult
     data class ReRegistration(val qrData: String) : QrCheckResult
+
+    /** Scanned a valid re-registration QR code from a new device that can't accept this account. */
+    data object ReRegistrationOutdatedDevice : QrCheckResult
   }
 }

feature/media-send/src/main/java/org/signal/mediasend/MediaSendScreen.kt

@@ -60,6 +60,14 @@ fun MediaSendScreen(
             onDismissRequest = onDismissRequest
           )
         }
+        viewModel.reRegistrationOutdatedDeviceDialog.Content { _, onDismissRequest, _, _, _ ->
+          Dialogs.SimpleMessageDialog(
+            title = stringResource(R.string.ReRegistrationScannedDialog__transfer_failed_title),
+            message = stringResource(R.string.ReRegistrationScannedDialog__the_device_you_are_transferring_to_is_out_of_date),
+            dismiss = stringResource(android.R.string.ok),
+            onDismiss = onDismissRequest
+          )
+        }
 
         viewModel.addToGroupStoryDialog.Content { recipientId, onDismissRequest, onConfirm, _, onDeny ->
           val groupName: String by LocalDisplayNameProvider.current(recipientId.id)

feature/media-send/src/main/res/values/strings.xml

@@ -231,6 +231,11 @@
   <!-- The label of a dialog asking the user if they would like to continue to the linked device settings screen. -->
   <string name="LinkedDeviceScannedDialog__device_link_dialog_continue">Continue</string>
 
+  <!-- The title of a dialog shown when the user scanned a transfer QR code from a device that is too old to accept their account. -->
+  <string name="ReRegistrationScannedDialog__transfer_failed_title">Can\'t transfer account</string>
+  <!-- The body of a dialog shown when the user scanned a transfer QR code from a device that is too old to accept their account. -->
+  <string name="ReRegistrationScannedDialog__the_device_you_are_transferring_to_is_out_of_date">The device you\'re transferring to is out of date. Update Signal on that device and try again.</string>
+
     <!-- Gif label displayed in a pill in the editor specifying the type of media being sent. -->
     <plurals name="MediaEditScreen__gif">
         <item quantity="one">%1$d Gif</item>