implement totp auto-typing

also extend totp updater to return the string so we can use that
result to type a code

apps-baosec/vault2/src/ux.rs

@@ -85,6 +85,8 @@ pub struct VaultUi {
     item_height: isize,
     style: GlyphStyle,
     storage_manager: Manager,
+
+    usb_dev: usb_bao1x::UsbHid,
 }
 
 impl VaultUi {
@@ -118,6 +120,7 @@ impl VaultUi {
             item_height: height / glyph_height,
             style,
             storage_manager: Manager::new(xns),
+            usb_dev: usb_bao1x::UsbHid::new(),
         }
     }
 
@@ -130,17 +133,27 @@ impl VaultUi {
         }
     }
 
-    pub(crate) fn update_selected_totp_code(&mut self) {
+    pub(crate) fn update_selected_totp_code(&mut self) -> Option<String> {
         if self.totp_list.len() > 0 {
             let selected = self.totp_list.get_selected();
             let mut locked_lists = self.item_lists.lock().unwrap();
             let full_list = locked_lists.full_list(VaultMode::Totp);
             if let Some(selected_item) = full_list.iter().find(|item| item.name() == selected) {
                 match crate::totp::db_str_to_code(&selected_item.extra) {
-                    Ok(s) => self.totp_code = Some(s),
-                    _ => self.totp_code = None,
+                    Ok(s) => {
+                        self.totp_code = Some(s.clone());
+                        Some(s)
+                    }
+                    _ => {
+                        self.totp_code = None;
+                        None
+                    }
                 }
+            } else {
+                None
             }
+        } else {
+            None
         }
     }
 
@@ -473,7 +486,12 @@ impl VaultUi {
                     NavDir::Down => {
                         self.totp_list.key_action('↓');
                     }
-                    _ => unimplemented!(),
+                    _ => {
+                        if let Some(code) = self.update_selected_totp_code() {
+                            // ignore USB errors while sending code
+                            self.usb_dev.send_str(&code).ok();
+                        }
+                    }
                 }
                 self.totp_code = None;
             }