Check for network connectivity before making any substantial username alteration request.

app/src/main/java/org/thoughtcrime/securesms/profiles/manage/UsernameEditViewModel.kt

@@ -14,9 +14,11 @@ import io.reactivex.rxjava3.subjects.PublishSubject
 import org.signal.core.util.Result
 import org.signal.core.util.logging.Log
 import org.signal.libsignal.usernames.Username
+import org.thoughtcrime.securesms.dependencies.ApplicationDependencies
 import org.thoughtcrime.securesms.keyvalue.SignalStore
 import org.thoughtcrime.securesms.profiles.manage.UsernameRepository.UsernameDeleteResult
 import org.thoughtcrime.securesms.profiles.manage.UsernameRepository.UsernameSetResult
+import org.thoughtcrime.securesms.util.NetworkUtil
 import org.thoughtcrime.securesms.util.UsernameUtil.InvalidReason
 import org.thoughtcrime.securesms.util.UsernameUtil.checkDiscriminator
 import org.thoughtcrime.securesms.util.UsernameUtil.checkUsername
@@ -123,6 +125,11 @@ internal class UsernameEditViewModel private constructor(private val isInRegistr
   }
 
   fun onUsernameSubmitted() {
+    if (!NetworkUtil.isConnected(ApplicationDependencies.getApplication())) {
+      events.onNext(Event.NETWORK_FAILURE)
+      return
+    }
+
     val editState = stateMachineStore.state
     val usernameState = uiState.state.usernameState
     val isCaseChange = isCaseChange(editState)

app/src/main/java/org/thoughtcrime/securesms/profiles/manage/UsernameRepository.kt

@@ -389,6 +389,11 @@ object UsernameRepository {
   private fun updateUsernameDisplayForCurrentLinkInternal(updatedUsername: Username): UsernameSetResult {
     Log.i(TAG, "[updateUsernameDisplayForCurrentLink] Beginning username update...")
 
+    if (!NetworkUtil.isConnected(ApplicationDependencies.getApplication())) {
+      Log.w(TAG, "[deleteUsernameInternal] No network connection! Not attempting the request.")
+      return UsernameSetResult.NETWORK_ERROR
+    }
+
     return try {
       val oldUsernameLink = SignalStore.account().usernameLink ?: return UsernameSetResult.USERNAME_INVALID
       val newUsernameLink = updatedUsername.generateLink(oldUsernameLink.entropy)
@@ -415,6 +420,11 @@ object UsernameRepository {
   private fun confirmUsernameAndCreateNewLinkInternal(username: Username): UsernameSetResult {
     Log.i(TAG, "[confirmUsernameAndCreateNewLink] Beginning username confirmation...")
 
+    if (!NetworkUtil.isConnected(ApplicationDependencies.getApplication())) {
+      Log.w(TAG, "[confirmUsernameAndCreateNewLink] No network connection! Not attempting the request.")
+      return UsernameSetResult.NETWORK_ERROR
+    }
+
     return try {
       val linkComponents: UsernameLinkComponents = accountManager.confirmUsernameAndCreateNewLink(username)
 
@@ -446,6 +456,11 @@ object UsernameRepository {
 
   @WorkerThread
   private fun deleteUsernameInternal(): UsernameDeleteResult {
+    if (!NetworkUtil.isConnected(ApplicationDependencies.getApplication())) {
+      Log.w(TAG, "[deleteUsernameInternal] No network connection! Not attempting the request.")
+      return UsernameDeleteResult.NETWORK_ERROR
+    }
+
     return try {
       accountManager.deleteUsername()
       SignalDatabase.recipients.setUsername(Recipient.self().id, null)