Showing an error message if biometric authentication fails

composeApp/src/commonMain/kotlin/net/codinux/banking/ui/composables/authentification/BiometricAuthenticationButton.kt

@@ -10,12 +10,13 @@ import androidx.compose.ui.Modifier
 import androidx.compose.ui.unit.dp
 import net.codinux.banking.ui.model.AuthenticationResult
 import net.codinux.banking.ui.service.AuthenticationService
+import net.codinux.banking.ui.service.safelyAuthenticateWithBiometrics
 
 @Composable
 fun BiometricAuthenticationButton(authenticationResult: (AuthenticationResult) -> Unit) {
 
     Row(Modifier.fillMaxWidth().padding(horizontal = 16.dp), horizontalArrangement = Arrangement.Center) {
-        Button({ AuthenticationService.authenticateWithBiometrics(authenticationResult) }, enabled = AuthenticationService.supportsBiometricAuthentication) {
+        Button({ AuthenticationService.safelyAuthenticateWithBiometrics(authenticationResult) }, enabled = AuthenticationService.supportsBiometricAuthentication) {
             Icon(Icons.Outlined.Fingerprint, "Sich mittels Biometrie authentifizieren", Modifier.size(84.dp))
         }
     }

composeApp/src/commonMain/kotlin/net/codinux/banking/ui/config/Internationalization.kt

@@ -13,6 +13,8 @@ object Internationalization {
 
     const val ErrorTransferMoney = "Überweisung konnte nicht ausgeführt werden"
 
+    const val ErrorBiometricAuthentication = "Biometrische Authentifizierung fehlgeschlagen"
+
 
     fun getTextForActionRequiringTan(action: ActionRequiringTan): String = when (action) {
         ActionRequiringTan.GetAnonymousBankInfo,

composeApp/src/commonMain/kotlin/net/codinux/banking/ui/dialogs/ApplicationErrorDialog.kt

@@ -11,9 +11,10 @@ fun ApplicationErrorDialog(error: ApplicationError, onDismiss: (() -> Unit)? = n
         ErroneousAction.AddAccount -> Internationalization.ErrorAddAccount
         ErroneousAction.UpdateAccountTransactions -> Internationalization.ErrorUpdateAccountTransactions
         ErroneousAction.TransferMoney -> Internationalization.ErrorTransferMoney
+        ErroneousAction.BiometricAuthentication -> Internationalization.ErrorBiometricAuthentication
     }
 
     // add exception stacktrace?
 
-    ErrorDialog(error.errorMessage, title, onDismiss = onDismiss)
+    ErrorDialog(error.errorMessage, title, error.exception, onDismiss = onDismiss)
 }

composeApp/src/commonMain/kotlin/net/codinux/banking/ui/dialogs/ErrorDialog.kt

@@ -7,23 +7,31 @@ import androidx.compose.material.TextButton
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.text.style.TextAlign
+import androidx.compose.ui.window.DialogProperties
 import net.codinux.banking.ui.composables.text.HeaderText
 import net.codinux.banking.ui.config.Colors
-import net.codinux.banking.ui.config.Style
+import net.codinux.banking.ui.extensions.verticalScroll
 
 @Composable
 fun ErrorDialog(
     text: String,
     title: String? = null,
+    exception: Throwable? = null,
     confirmButtonText: String = "OK",
     onDismiss: (() -> Unit)? = null
 ) {
 
+    val effectiveText = if (exception == null) text else {
+        "$text\r\n\r\nFehlermeldung:\r\n${exception.stackTraceToString()}"
+    }
+
+
     AlertDialog(
-        text = { Text(text) },
+        text = { Text(effectiveText, Modifier.verticalScroll()) },
         title = { title?.let {
             HeaderText(title, Modifier.fillMaxWidth(), TextAlign.Center)
         } },
+        properties = if (exception == null) DialogProperties() else DialogProperties(usePlatformDefaultWidth = false),
         onDismissRequest = { onDismiss?.invoke() },
         confirmButton = {
             Row(Modifier.fillMaxWidth(), horizontalArrangement = Arrangement.End) {

composeApp/src/commonMain/kotlin/net/codinux/banking/ui/model/error/ErroneousAction.kt

@@ -5,5 +5,7 @@ enum class ErroneousAction {
 
     UpdateAccountTransactions,
 
-    TransferMoney
+    TransferMoney,
+
+    BiometricAuthentication
 }

composeApp/src/commonMain/kotlin/net/codinux/banking/ui/screens/LoginScreen.kt

@@ -22,6 +22,7 @@ import net.codinux.banking.ui.model.AuthenticationResult
 import net.codinux.banking.ui.model.settings.AppAuthenticationMethod
 import net.codinux.banking.ui.model.settings.AppSettings
 import net.codinux.banking.ui.service.AuthenticationService
+import net.codinux.banking.ui.service.safelyAuthenticateWithBiometrics
 import org.jetbrains.compose.resources.imageResource
 
 @Composable
@@ -105,7 +106,7 @@ fun LoginScreen(appSettings: AppSettings, onLoginSuccess: () -> Unit) {
 
     LaunchedEffect(appSettings.authenticationMethod) {
         if (appSettings.authenticationMethod == AppAuthenticationMethod.Biometric) {
-            AuthenticationService.authenticateWithBiometrics { result ->
+            AuthenticationService.safelyAuthenticateWithBiometrics { result ->
                 checkBiometricLoginResult(result)
             }
         }

composeApp/src/commonMain/kotlin/net/codinux/banking/ui/service/AuthenticationService.kt

@@ -1,6 +1,9 @@
 package net.codinux.banking.ui.service
 
+import net.codinux.banking.ui.config.DI
 import net.codinux.banking.ui.model.AuthenticationResult
+import net.codinux.banking.ui.model.error.ErroneousAction
+import net.codinux.log.Log
 
 expect object AuthenticationService {
 
@@ -13,4 +16,14 @@ expect object AuthenticationService {
 
     fun authenticateWithBiometrics(authenticationResult: (AuthenticationResult) -> Unit)
 
+}
+
+
+fun AuthenticationService.safelyAuthenticateWithBiometrics(authenticationResult: (AuthenticationResult) -> Unit) {
+    try {
+        this.authenticateWithBiometrics(authenticationResult)
+    } catch (e: Throwable) {
+        Log.error(e) { "Could not authenticate with Biometrics" }
+        DI.uiState.applicationErrorOccurred(ErroneousAction.BiometricAuthentication, "Beim Login mit Fingerabdruck / Gesichtsscan ist etwas fehlgeschlagen, was nicht fehlschlagen sollte. Die folgende Fehlermeldung wird Ihnen vermutlich nichts sagen. Am besten informieren Sie die Entwickler (die faulen Säcke), z. B. mit einem Screenshot dieser Fehlermeldung, damit diese sich darum kümmern.", e)
+    }
 }