Check network availability

android/app/src/main/kotlin/net/mullvad/mullvadvpn/compose/screen/LoginScreen.kt

@@ -295,6 +295,7 @@ private fun LoginState.supportingText(): String? {
                 when (loginError) {
                     LoginError.InvalidCredentials -> R.string.login_fail_description
                     LoginError.UnableToCreateAccount -> R.string.failed_to_create_account
+                    LoginError.NoInternetConnection -> R.string.no_internet_connection
                     is LoginError.Unknown -> R.string.error_occurred
                     null -> return null
                 }

android/app/src/main/kotlin/net/mullvad/mullvadvpn/compose/state/LoginUiState.kt

@@ -37,4 +37,6 @@ sealed class LoginError {
     data object InvalidCredentials : LoginError()
 
     data class Unknown(val reason: String) : LoginError()
+
+    data object NoInternetConnection : LoginError()
 }

android/app/src/main/kotlin/net/mullvad/mullvadvpn/di/UiModule.kt

@@ -24,6 +24,7 @@ import net.mullvad.mullvadvpn.ui.serviceconnection.RelayListListener
 import net.mullvad.mullvadvpn.ui.serviceconnection.ServiceConnectionManager
 import net.mullvad.mullvadvpn.ui.serviceconnection.SplitTunneling
 import net.mullvad.mullvadvpn.usecase.AccountExpiryNotificationUseCase
+import net.mullvad.mullvadvpn.usecase.ConnectivityUseCase
 import net.mullvad.mullvadvpn.usecase.EmptyPaymentUseCase
 import net.mullvad.mullvadvpn.usecase.NewDeviceNotificationUseCase
 import net.mullvad.mullvadvpn.usecase.PaymentUseCase
@@ -100,6 +101,7 @@ val uiModule = module {
     single { NewDeviceNotificationUseCase(get()) }
     single { PortRangeUseCase(get()) }
     single { RelayListUseCase(get(), get()) }
+    single { ConnectivityUseCase(get()) }
 
     single { InAppNotificationController(get(), get(), get(), get(), MainScope()) }
 
@@ -130,7 +132,7 @@ val uiModule = module {
     viewModel { ConnectViewModel(get(), get(), get(), get(), get(), get(), get()) }
     viewModel { DeviceListViewModel(get(), get()) }
     viewModel { DeviceRevokedViewModel(get(), get()) }
-    viewModel { LoginViewModel(get(), get(), get()) }
+    viewModel { LoginViewModel(get(), get(), get(), get()) }
     viewModel { PrivacyDisclaimerViewModel(get()) }
     viewModel { SelectLocationViewModel(get(), get(), get()) }
     viewModel { SettingsViewModel(get(), get()) }

android/app/src/main/kotlin/net/mullvad/mullvadvpn/usecase/ConnectivityUseCase.kt

@@ -0,0 +1,17 @@
+package net.mullvad.mullvadvpn.usecase
+
+import android.content.Context
+import android.net.ConnectivityManager
+import android.net.NetworkCapabilities
+
+class ConnectivityUseCase(val context: Context) {
+    fun isInternetAvailable(): Boolean {
+        val connectivityManager =
+            context.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager
+
+        val network = connectivityManager.activeNetwork
+        val capabilities = connectivityManager.getNetworkCapabilities(network)
+
+        return capabilities?.hasCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET) == true
+    }
+}

android/app/src/main/kotlin/net/mullvad/mullvadvpn/viewmodel/LoginViewModel.kt

@@ -17,14 +17,17 @@ import kotlinx.coroutines.flow.update
 import kotlinx.coroutines.launch
 import net.mullvad.mullvadvpn.compose.state.LoginError
 import net.mullvad.mullvadvpn.compose.state.LoginState
-import net.mullvad.mullvadvpn.compose.state.LoginState.*
+import net.mullvad.mullvadvpn.compose.state.LoginState.Idle
+import net.mullvad.mullvadvpn.compose.state.LoginState.Loading
+import net.mullvad.mullvadvpn.compose.state.LoginState.Success
 import net.mullvad.mullvadvpn.compose.state.LoginUiState
 import net.mullvad.mullvadvpn.constant.LOGIN_TIMEOUT_MILLIS
 import net.mullvad.mullvadvpn.model.AccountCreationResult
 import net.mullvad.mullvadvpn.model.AccountToken
 import net.mullvad.mullvadvpn.model.LoginResult
 import net.mullvad.mullvadvpn.repository.AccountRepository
 import net.mullvad.mullvadvpn.repository.DeviceRepository
+import net.mullvad.mullvadvpn.usecase.ConnectivityUseCase
 import net.mullvad.mullvadvpn.usecase.NewDeviceNotificationUseCase
 import net.mullvad.mullvadvpn.util.awaitWithTimeoutOrNull
 
@@ -42,6 +45,7 @@ class LoginViewModel(
     private val accountRepository: AccountRepository,
     private val deviceRepository: DeviceRepository,
     private val newDeviceNotificationUseCase: NewDeviceNotificationUseCase,
+    private val connectivityUseCase: ConnectivityUseCase,
     private val dispatcher: CoroutineDispatcher = Dispatchers.IO
 ) : ViewModel() {
     private val _loginState = MutableStateFlow(LoginUiState.INITIAL.loginState)
@@ -75,6 +79,10 @@ class LoginViewModel(
     }
 
     fun login(accountToken: String) {
+        if (!isInternetAvailable()) {
+            _loginState.value = Idle(LoginError.NoInternetConnection)
+            return
+        }
         _loginState.value = Loading.LoggingIn
         viewModelScope.launch(dispatcher) {
             // Ensure we always take at least MINIMUM_LOADING_SPINNER_TIME_MILLIS to show the
@@ -135,4 +143,8 @@ class LoginViewModel(
             Idle(LoginError.UnableToCreateAccount)
         }
     }
+
+    private fun isInternetAvailable(): Boolean {
+        return connectivityUseCase.isInternetAvailable()
+    }
 }

android/lib/resource/src/main/res/values/strings.xml

@@ -35,6 +35,7 @@
     <string name="voucher_already_used">Voucher code has already been used.</string>
     <string name="error_occurred">An error occurred.</string>
     <string name="settings">Settings</string>
+    <string name="no_internet_connection">No internet connection</string>
     <string name="settings_account">Account</string>
     <string name="less_than_a_day_left">less than a day left</string>
     <string name="less_than_a_minute_ago">less than a minute ago</string>