Add custom UI status

This patch adds a custom UI status that can be defined and handled by
the runner.  Applications that want to use this status should have a
configuration option that lets the runner provide a value to use for
that status.  The runner is responsible for correctly handling this
status value.

Fixes #5

src/api.rs

@@ -82,6 +82,7 @@ generate_enums! {
     Reboot: 42
     Uptime: 43
     Wink: 44
+    SetCustomStatus: 45
 
     //////////////
     // Counters //
@@ -325,6 +326,9 @@ pub mod request {
         Wink:
           - duration: core::time::Duration
 
+        SetCustomStatus:
+          - status: u8
+
         CreateCounter:
           - location: Location
 
@@ -481,6 +485,8 @@ pub mod reply {
 
         Wink:
 
+        SetCustomStatus:
+
         CreateCounter:
           - id: CounterId
 

src/client.rs

@@ -709,6 +709,10 @@ pub trait UiClient: PollClient {
     fn wink(&mut self, duration: core::time::Duration) -> ClientResult<'_, reply::Wink, Self> {
         self.request(request::Wink { duration })
     }
+
+    fn set_custom_status(&mut self, status: u8) -> ClientResult<'_, reply::SetCustomStatus, Self> {
+        self.request(request::SetCustomStatus { status })
+    }
 }
 
 /// Builder for [`ClientImplementation`][].

src/service.rs

@@ -20,6 +20,7 @@ pub use crate::store::{
     filestore::{ClientFilestore, Filestore, ReadDirFilesState, ReadDirState},
     keystore::{ClientKeystore, Keystore},
 };
+use crate::types::ui::Status;
 use crate::types::*;
 use crate::Bytes;
 use crate::{api::*, interrupt::InterruptFlag};
@@ -584,6 +585,11 @@ impl<P: Platform> ServiceResources<P> {
                 Ok(Reply::Wink(reply::Wink {}))
             }
 
+            Request::SetCustomStatus(request) => {
+                self.platform.user_interface().set_status(Status::Custom(request.status));
+                Ok(Reply::SetCustomStatus(reply::SetCustomStatus {}))
+            }
+
             Request::CreateCounter(request) => {
                 counterstore.create(request.location)
                     .map(|id| Reply::CreateCounter(reply::CreateCounter { id } ))

src/types.rs

@@ -176,6 +176,7 @@ pub mod ui {
         WaitingForUserPresence,
         Processing,
         Error,
+        Custom(u8),
     }
 }