Publish program running state

src/main.rs

@@ -15,7 +15,7 @@ mod update_listener;
 
 use eyre::Result;
 use std::sync::Arc;
-use tracing::info;
+use tracing::{debug, info};
 use tracing_subscriber::EnvFilter;
 use update_listener::UpdateListener;
 
@@ -34,7 +34,7 @@ async fn main() -> Result<()> {
 
     let sections = database::query_sections(&conn)?;
     for sec in sections.values() {
-        info!(section = debug(&sec), "read section");
+        debug!(section = debug(&sec), "read section");
     }
 
     // TODO: Section interface which actual does something. Preferrably selectable somehow
@@ -53,7 +53,7 @@ async fn main() -> Result<()> {
     }
 
     for prog in programs.values() {
-        info!(program = debug(&prog), "read program");
+        debug!(program = debug(&prog), "read program");
     }
 
     let mqtt_options = mqtt_interface::Options {
@@ -64,10 +64,11 @@ async fn main() -> Result<()> {
     };
     let mut mqtt_interface = mqtt_interface::MqttInterfaceTask::start(mqtt_options).await?;
 
-    let update_listener = UpdateListener::start(
-        section_runner.subscribe().await?,
-        mqtt_interface.clone(),
-    );
+    let update_listener = {
+        let section_events = section_runner.subscribe().await?;
+        let program_events = program_runner.subscribe().await?;
+        UpdateListener::start(section_events, program_events, mqtt_interface.clone())
+    };
 
     program_runner.update_sections(sections.clone()).await?;
     mqtt_interface.publish_sections(&sections).await?;
@@ -77,6 +78,11 @@ async fn main() -> Result<()> {
             .await?;
     }
     program_runner.update_programs(programs.clone()).await?;
+    for program_id in programs.keys() {
+        mqtt_interface
+            .publish_program_running(*program_id, false)
+            .await?;
+    }
     mqtt_interface.publish_programs(&programs).await?;
 
     info!("sprinklers_rs initialized");

src/mqtt_interface.rs

@@ -48,6 +48,10 @@ where
     fn program_data(&self, program_id: ProgramId) -> String {
         format!("{}/programs/{}", self.prefix.as_ref(), program_id)
     }
+
+    fn program_running(&self, program_id: ProgramId) -> String {
+        format!("{}/programs/{}/running", self.prefix.as_ref(), program_id)
+    }
 }
 
 #[derive(Clone, Debug)]
@@ -59,7 +63,7 @@ pub struct Options {
 }
 
 async fn event_loop_task(
-    mut interface: MqttInterface,
+    interface: MqttInterface,
     mut event_loop: rumqttc::EventLoop,
 ) -> eyre::Result<()> {
     use rumqttc::{ConnectionError, Event};
@@ -77,9 +81,7 @@ async fn event_loop_task(
                             // HACK: this really should just be await
                             // but that can sometimes deadlock if the publish channel is full
                             let mut interface = interface.clone();
-                            let fut = async move {
-                                interface.publish_connected(true).await
-                            };
+                            let fut = async move { interface.publish_connected(true).await };
                             tokio::spawn(fut);
                         }
                         //.await?;
@@ -216,6 +218,23 @@ impl MqttInterface {
             .await?;
         Ok(())
     }
+
+    pub async fn publish_program_running(
+        &mut self,
+        program_id: ProgramId,
+        running: bool,
+    ) -> eyre::Result<()> {
+        let payload = running.to_string();
+        self.client
+            .publish(
+                self.topics.program_running(program_id),
+                QoS::AtLeastOnce,
+                true,
+                payload,
+            )
+            .await?;
+        Ok(())
+    }
 }
 
 pub struct MqttInterfaceTask {

src/update_listener.rs

@@ -1,5 +1,6 @@
 use crate::{
     mqtt_interface::MqttInterface,
+    program_runner::{ProgramEvent, ProgramEventRecv},
     section_runner::{SectionEvent, SectionEventRecv},
 };
 use tokio::{
@@ -11,6 +12,8 @@ use tracing::{trace, trace_span, warn};
 use tracing_futures::Instrument;
 
 struct UpdateListenerTask {
+    section_events: SectionEventRecv,
+    program_events: ProgramEventRecv,
     mqtt_interface: MqttInterface,
     running: bool,
 }
@@ -48,37 +51,62 @@ impl UpdateListenerTask {
         Ok(())
     }
 
-    async fn run_impl(&mut self, mut section_events: SectionEventRecv) -> eyre::Result<()> {
+    async fn handle_program_event(
+        &mut self,
+        event: Result<ProgramEvent, broadcast::RecvError>,
+    ) -> eyre::Result<()> {
+        let event = match event {
+            Ok(ev) => ev,
+            Err(broadcast::RecvError::Closed) => {
+                trace!("section events channel closed");
+                self.running = false;
+                return Ok(());
+            }
+            Err(broadcast::RecvError::Lagged(n)) => {
+                warn!("section events lagged by {}", n);
+                return Ok(());
+            }
+        };
+        let (program_id, running) = match event {
+            ProgramEvent::RunStart(prog) => (prog.id, true),
+            ProgramEvent::RunFinish(prog) | ProgramEvent::RunCancel(prog) => (prog.id, false),
+        };
+        self.mqtt_interface
+            .publish_program_running(program_id, running)
+            .await?;
+        Ok(())
+    }
+
+    async fn run_impl(&mut self) -> eyre::Result<()> {
         while self.running {
             select! {
-                section_event = section_events.recv() => {
+                section_event = self.section_events.recv() => {
                     self.handle_section_event(section_event).await?
                 }
+                program_event = self.program_events.recv() => {
+                    self.handle_program_event(program_event).await?
+                }
             };
         }
         Ok(())
     }
 
-    async fn run_or_quit(
-        mut self,
-        mut quit_rx: oneshot::Receiver<()>,
-        section_events: SectionEventRecv,
-    ) -> eyre::Result<()> {
+    async fn run_or_quit(mut self, mut quit_rx: oneshot::Receiver<()>) -> eyre::Result<()> {
         select! {
             _ = &mut quit_rx => {
                 self.running = false;
                 Ok(())
             }
-            res = self.run_impl(section_events) => {
+            res = self.run_impl() => {
                 res
             }
         }
     }
 
-    async fn run(self, quit_rx: oneshot::Receiver<()>, section_events: SectionEventRecv) {
+    async fn run(self, quit_rx: oneshot::Receiver<()>) {
         let span = trace_span!("update_listener task");
 
-        self.run_or_quit(quit_rx, section_events)
+        self.run_or_quit(quit_rx)
             .instrument(span)
             .await
             .expect("error in UpdateListenerTask");
@@ -91,13 +119,19 @@ pub struct UpdateListener {
 }
 
 impl UpdateListener {
-    pub fn start(section_events: SectionEventRecv, mqtt_interface: MqttInterface) -> Self {
+    pub fn start(
+        section_events: SectionEventRecv,
+        program_events: ProgramEventRecv,
+        mqtt_interface: MqttInterface,
+    ) -> Self {
         let task = UpdateListenerTask {
+            section_events,
+            program_events,
             mqtt_interface,
             running: true,
         };
         let (quit_tx, quit_rx) = oneshot::channel();
-        let join_handle = tokio::spawn(task.run(quit_rx, section_events));
+        let join_handle = tokio::spawn(task.run(quit_rx));
         Self {
             quit_tx,
             join_handle,