82 lines
2.3 KiB
Rust
82 lines
2.3 KiB
Rust
use async_trait::async_trait;
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use rumqttc::{matches, AsyncClient};
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use tokio::sync::watch;
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use tracing::{error, trace, debug};
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use crate::{config::{MqttDeviceConfig, LightSensorConfig}, mqtt::{self, OnMqtt, BrightnessMessage}, error::LightSensorError};
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#[async_trait]
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pub trait OnDarkness {
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async fn on_darkness(&mut self, dark: bool);
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}
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pub type Receiver = watch::Receiver<bool>;
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type Sender = watch::Sender<bool>;
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struct LightSensor {
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mqtt: MqttDeviceConfig,
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min: isize,
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max: isize,
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tx: Sender,
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is_dark: Receiver,
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}
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impl LightSensor {
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fn new(mqtt: MqttDeviceConfig, min: isize, max: isize) -> Self {
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let (tx, is_dark) = watch::channel(false);
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Self { is_dark, mqtt, min, max, tx }
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}
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}
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pub async fn start(mut mqtt_rx: mqtt::Receiver, config: LightSensorConfig, client: AsyncClient) -> Result<Receiver, LightSensorError> {
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client.subscribe(config.mqtt.topic.clone(), rumqttc::QoS::AtLeastOnce).await?;
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let mut light_sensor = LightSensor::new(config.mqtt, config.min, config.max);
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let is_dark = light_sensor.is_dark.clone();
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tokio::spawn(async move {
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loop {
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// TODO: Handle errors, warn if lagging
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if let Ok(message) = mqtt_rx.recv().await {
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light_sensor.on_mqtt(&message).await;
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}
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}
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});
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Ok(is_dark)
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}
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#[async_trait]
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impl OnMqtt for LightSensor {
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async fn on_mqtt(&mut self, message: &rumqttc::Publish) {
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if !matches(&message.topic, &self.mqtt.topic) {
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return;
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}
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let illuminance = match BrightnessMessage::try_from(message) {
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Ok(state) => state.illuminance(),
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Err(err) => {
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error!("Failed to parse message: {err}");
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return;
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}
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};
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debug!("Illuminance: {illuminance}");
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let is_dark = if illuminance <= self.min {
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trace!("It is dark");
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true
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} else if illuminance >= self.max {
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trace!("It is light");
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false
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} else {
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trace!("In between min ({}) and max ({}) value, keeping current state: {}", self.min, self.max, *self.is_dark.borrow());
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*self.is_dark.borrow()
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};
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if is_dark != *self.is_dark.borrow() {
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debug!("Dark state has changed: {is_dark}");
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self.tx.send(is_dark).ok();
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}
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}
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}
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