Finish wiring up USB error page

Author: iinuwa

.idea/.gitignore

@@ -219,6 +219,13 @@
                     <property name="orientation">vertical</property>
                     <child>
                       <object class="GtkLabel">
+                        <binding name="label">
+                          <lookup name="prompt">
+                            <lookup name="view-model">
+                              ExampleApplicationWindow
+                            </lookup>
+                          </lookup>
+                        </binding>
                         <property name="label">Something went wrong while retrieving a credential. Please try again later or use a different authenticator.</property>
                       </object>
                     </child>

.idea/linux-webauthn-platform-api.iml

@@ -180,19 +180,21 @@ impl InProcessUsbHandler {
                 UsbStateInternal::NeedsPin { .. }
                 | UsbStateInternal::NeedsUserVerification { .. }
                 | UsbStateInternal::NeedsUserPresence => match signal_rx.recv().await {
-                    Some(msg) => match msg? {
-                        UsbUvMessage::NeedsPin {
+                    Some(msg) => match msg {
+                        Ok(UsbUvMessage::NeedsPin {
                             attempts_left,
                             pin_tx,
-                        } => Ok(UsbStateInternal::NeedsPin {
+                        }) => Ok(UsbStateInternal::NeedsPin {
                             attempts_left,
                             pin_tx,
                         }),
-                        UsbUvMessage::NeedsUserVerification { attempts_left } => {
+                        Ok(UsbUvMessage::NeedsUserVerification { attempts_left }) => {
                             Ok(UsbStateInternal::NeedsUserVerification { attempts_left })
                         }
-                        UsbUvMessage::NeedsUserPresence => Ok(UsbStateInternal::NeedsUserPresence),
-                        UsbUvMessage::ReceivedCredentials(response) => match response {
+                        Ok(UsbUvMessage::NeedsUserPresence) => {
+                            Ok(UsbStateInternal::NeedsUserPresence)
+                        }
+                        Ok(UsbUvMessage::ReceivedCredentials(response)) => match response {
                             AuthenticatorResponse::CredentialCreated(make_credential_response) => {
                                 Ok(UsbStateInternal::Completed(
                                     CredentialResponse::from_make_credential(
@@ -218,6 +220,7 @@ impl InProcessUsbHandler {
                                 }
                             }
                         },
+                        Err(err) => Err(err),
                     },
                     None => Err(Error::Internal("USB UV handler channel closed".to_string())),
                 },

.idea/modules.xml

@@ -175,9 +175,10 @@ impl ViewModel {
                                     view_model.set_qr_spinner_visible(false);
                                     view_model.set_completed(true);
                                 }
-                                ViewUpdate::Failed => {
+                                ViewUpdate::Failed(error_msg) => {
                                     view_model.set_qr_spinner_visible(false);
                                     view_model.set_failed(true);
+                                    view_model.set_prompt(error_msg);
                                 }
                             }
                         }

.idea/vcs.xml

@@ -10,7 +10,9 @@ use async_std::{
 use tokio::sync::mpsc;
 use tracing::{error, info};
 
-use crate::credential_service::{CredentialServiceClient, UsbState};
+use crate::credential_service::{
+    CredentialServiceClient, Error as CredentialServiceError, UsbState,
+};
 
 #[derive(Debug)]
 pub(crate) struct ViewModel<C>
@@ -281,8 +283,16 @@ impl<C: CredentialServiceClient + Send> ViewModel<C> {
                                 .unwrap();
                         }
                         // TODO: Provide more specific error messages using the wrapped Error.
-                        UsbState::Failed(_) => {
-                            self.tx_update.send(ViewUpdate::Failed).await.unwrap()
+                        UsbState::Failed(err) => {
+                            let error_msg = String::from(match err {
+                                CredentialServiceError::NoCredentials => "No matching credentials found on this authenticator.",
+                                CredentialServiceError::PinAttemptsExhausted => "No more PIN attempts allowed. Try removing your device and plugging it back in.",
+                                CredentialServiceError::AuthenticatorError | CredentialServiceError::Internal(_) => "Something went wrong while retrieving a credential. Please try again later or use a different authenticator.",
+                            });
+                            self.tx_update
+                                .send(ViewUpdate::Failed(error_msg))
+                                .await
+                                .unwrap()
                         }
                     }
                 }
@@ -323,7 +333,7 @@ impl<C: CredentialServiceClient + Send> ViewModel<C> {
                         }
                         HybridState::Failed => {
                             self.hybrid_qr_code_data = None;
-                            self.tx_update.send(ViewUpdate::Failed).await.unwrap();
+                            self.tx_update.send(ViewUpdate::Failed(String::from("Something went wrong. Try again later or use a different authenticator."))).await.unwrap();
                         }
                     };
                 }
@@ -357,7 +367,7 @@ pub enum ViewUpdate {
     HybridConnected,
 
     Completed,
-    Failed,
+    Failed(String),
 }
 
 pub enum BackgroundEvent {

xyz-iinuwa-credential-manager-portal-gtk/data/resources/ui/window.ui

@@ -194,7 +194,7 @@ impl ExampleApplicationWindow {
             #[weak]
             stack,
             move |vm| {
-                if vm.completed() {
+                if vm.failed() {
                     stack.set_visible_child_name("failed");
                 }
             }