Only enable TCP reconnect when failover is needed

app/src/main/java/nl/eduvpn/app/fragment/ConnectionStatusFragment.kt

@@ -23,6 +23,7 @@ import android.view.View
 import androidx.activity.OnBackPressedCallback
 import androidx.appcompat.app.AlertDialog
 import androidx.core.view.postDelayed
+import androidx.fragment.app.activityViewModels
 import androidx.fragment.app.viewModels
 import androidx.lifecycle.Observer
 import androidx.lifecycle.asLiveData
@@ -47,6 +48,7 @@ import nl.eduvpn.app.utils.ErrorDialog
 import nl.eduvpn.app.utils.FormattingUtils
 import nl.eduvpn.app.viewmodel.BaseConnectionViewModel
 import nl.eduvpn.app.viewmodel.ConnectionStatusViewModel
+import nl.eduvpn.app.viewmodel.MainViewModel
 import org.eduvpn.common.Protocol
 
 /**
@@ -62,11 +64,14 @@ class ConnectionStatusFragment : BaseFragment<FragmentConnectionStatusBinding>()
 
     private val viewModel by viewModels<ConnectionStatusViewModel> { viewModelFactory }
 
+    private val mainViewModel by activityViewModels<MainViewModel> { viewModelFactory }
+
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
         EduVPNApplication.get(view.context).component().inject(this)
         binding.viewModel = viewModel
         binding.isTcp = viewModel.isCurrentProtocolUsingTcp()
+        binding.failoverNeeded = mainViewModel.failoverResult.value ?: false
         binding.secondsConnected = viewModel.connectionTimeLiveData.map { secondsConnected ->
             val context = [email protected] ?: return@map null
             FormattingUtils.formatDurationSeconds(
@@ -206,6 +211,9 @@ class ConnectionStatusFragment : BaseFragment<FragmentConnectionStatusBinding>()
                 updateCertExpiryObserver?.let { obs -> viewModel.timer.removeObserver(obs) }
             }
         }
+        mainViewModel.failoverResult.observe(viewLifecycleOwner) {
+            binding.failoverNeeded = it
+        }
         viewModel.timer.observe(viewLifecycleOwner, updateCertExpiryObserver)
         viewModel.vpnStatus.observe(viewLifecycleOwner) { status ->
             binding.connectionStatus.setText(VPNConnectionService.vpnStatusToStringID(status))

app/src/main/java/nl/eduvpn/app/viewmodel/MainViewModel.kt

@@ -69,6 +69,9 @@ class MainViewModel @Inject constructor(
     val mainParentAction = _mainParentAction.toSingleEvent()
 
     val proxyGuardEnabled: Boolean get() = preferencesService.getCurrentProtocol() == Protocol.WireGuardWithTCP.nativeValue
+    private val _failoverResult = MutableLiveData(false)
+    val failoverResult = _failoverResult.toSingleEvent()
+
 
     init {
         backendService.register(
@@ -159,21 +162,7 @@ class MainViewModel @Inject constructor(
                     // Waits a bit so that the network interface has been surely set up
                     delay(1_000L)
                     backendService.startFailOver(service) {
-                        // Failover needed, request a new profile with TCP enforced.
-                        preferencesService.getCurrentInstance()?.let { currentInstance ->
-                            viewModelScope.launch {
-                                // Disconnect first, otherwise we don't have any internet :)
-                                service.disconnect()
-                                // Wait a bit for the disconnection to finish
-                                delay(500L)
-                                // Fetch a new profile, now with TCP forced
-                                try {
-                                    backendService.getConfig(currentInstance, preferTcp = true)
-                                } catch (ex: Exception) {
-                                    Log.w(TAG, "Could not fetch new config!", ex)
-                                }
-                            }
-                        }
+                        _failoverResult.postValue(true)
                     }
                 } catch (ex: CommonException) {
                     // These are just warnings, so we log them, but don't display to the user

app/src/main/res/layout/fragment_connection_status.xml

@@ -38,6 +38,10 @@
             name="isTcp"
             type="boolean" />
 
+        <variable
+            name="failoverNeeded"
+            type="boolean" />
+
         <import type="android.view.View" />
     </data>
 
@@ -209,7 +213,7 @@
                 android:layout_marginTop="16dp"
                 android:textColor="@color/textColor"
                 android:textSize="14sp"
-                android:visibility="@{isTcp ? View.GONE : View.VISIBLE}"
+                android:visibility="@{isTcp || !failoverNeeded ? View.GONE : View.VISIBLE}"
                 android:text="@string/connection_status_connectivity_problems"
                 android:layout_height="wrap_content"/>
 
@@ -218,7 +222,7 @@
                 android:id="@+id/reconnect_tcp_button"
                 android:layout_width="wrap_content"
                 android:layout_marginTop="8dp"
-                android:visibility="@{isTcp ? View.GONE : View.VISIBLE}"
+                android:visibility="@{isTcp || !failoverNeeded ? View.GONE : View.VISIBLE}"
                 android:text="@string/connection_status_reconnect_with_tcp"
                 android:layout_height="wrap_content"/>
         </LinearLayout>