133 lines
3.7 KiB
Rust
133 lines
3.7 KiB
Rust
use std::collections::HashMap;
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use std::ops::Deref;
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use std::sync::Arc;
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use async_trait::async_trait;
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use automation_cast::Cast;
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use automation_macro::LuaDeviceConfig;
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use rumqttc::Publish;
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use tokio::sync::{RwLock, RwLockReadGuard, RwLockWriteGuard};
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use tracing::{debug, trace, warn};
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use crate::config::MqttDeviceConfig;
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use crate::device::{impl_device, Device, LuaDeviceCreate};
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use crate::event::{self, Event, EventChannel, OnMqtt};
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use crate::messages::PresenceMessage;
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use crate::mqtt::WrappedAsyncClient;
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#[derive(Debug, Clone, LuaDeviceConfig)]
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pub struct Config {
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#[device_config(flatten)]
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pub mqtt: MqttDeviceConfig,
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#[device_config(from_lua, rename("event_channel"), with(|ec: EventChannel| ec.get_tx()))]
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pub tx: event::Sender,
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#[device_config(from_lua)]
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pub client: WrappedAsyncClient,
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}
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pub const DEFAULT_PRESENCE: bool = false;
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#[derive(Debug)]
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pub struct State {
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devices: HashMap<String, bool>,
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current_overall_presence: bool,
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}
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#[derive(Debug, Clone)]
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pub struct Presence {
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config: Config,
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state: Arc<RwLock<State>>,
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}
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impl Presence {
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async fn state(&self) -> RwLockReadGuard<State> {
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self.state.read().await
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}
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async fn state_mut(&self) -> RwLockWriteGuard<State> {
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self.state.write().await
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}
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}
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impl_device!(Presence);
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#[async_trait]
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impl LuaDeviceCreate for Presence {
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type Config = Config;
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type Error = rumqttc::ClientError;
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async fn create(config: Self::Config) -> Result<Self, Self::Error> {
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trace!(id = "presence", "Setting up Presence");
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config
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.client
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.subscribe(&config.mqtt.topic, rumqttc::QoS::AtLeastOnce)
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.await?;
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let state = State {
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devices: HashMap::new(),
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current_overall_presence: DEFAULT_PRESENCE,
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};
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let state = Arc::new(RwLock::new(state));
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Ok(Self { config, state })
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}
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}
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impl Device for Presence {
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fn get_id(&self) -> String {
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"presence".to_string()
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}
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}
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#[async_trait]
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impl OnMqtt for Presence {
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async fn on_mqtt(&self, message: Publish) {
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if !rumqttc::matches(&message.topic, &self.config.mqtt.topic) {
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return;
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}
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let offset = self
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.config
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.mqtt
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.topic
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.find('+')
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.or(self.config.mqtt.topic.find('#'))
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.expect("Presence::create fails if it does not contain wildcards");
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let device_name = message.topic[offset..].into();
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if message.payload.is_empty() {
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// Remove the device from the map
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debug!("State of device [{device_name}] has been removed");
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self.state_mut().await.devices.remove(&device_name);
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} else {
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let present = match PresenceMessage::try_from(message) {
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Ok(state) => state.presence(),
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Err(err) => {
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warn!("Failed to parse message: {err}");
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return;
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}
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};
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debug!("State of device [{device_name}] has changed: {}", present);
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self.state_mut().await.devices.insert(device_name, present);
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}
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let overall_presence = self.state().await.devices.iter().any(|(_, v)| *v);
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if overall_presence != self.state().await.current_overall_presence {
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debug!("Overall presence updated: {overall_presence}");
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self.state_mut().await.current_overall_presence = overall_presence;
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if self
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.config
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.tx
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.send(Event::Presence(overall_presence))
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.await
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.is_err()
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{
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warn!("There are no receivers on the event channel");
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}
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}
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}
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}
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