Start work on mqtt

.gitignore

@@ -1,3 +1,4 @@
+/.env
 /debug/
 /target/
 /Cargo.lock

common/src/lib.rs

@@ -1,6 +1,6 @@
 #![feature(array_chunks)]
 
-use clap::Parser;
+use clap::{Args, Parser};
 use error::ProgramError;
 
 mod cava;
@@ -76,15 +76,32 @@ pub struct Config {
     #[clap(short, long, env, help = "Reverse all patterns")]
     pub reverse: bool,
 
-    #[clap(long, env, help = "MQTT broker host", requires_all = ["mqtt_id", "mqtt_port"])]
-    pub mqtt_broker: Option<String>,
-    #[clap(long, env, help = "MQTT broker port", default_value = "1883")]
-    pub mqtt_port: Option<u16>,
-    #[clap(long, env, help = "MQTT device id")]
-    pub mqtt_id: Option<String>,
+    #[clap(flatten)]
+    pub mqtt: MqttConfig,
+}
 
+#[derive(Debug, Args, Clone)]
+pub struct MqttConfig {
+    #[clap(long, env, help = "MQTT broker host")]
+    pub mqtt_broker: String,
+    #[clap(long, env, help = "MQTT broker port", default_value = "1883")]
+    pub mqtt_port: u16,
+    #[clap(long, env, help = "MQTT device id", value_parser = mqtt_topic_segment)]
+    pub mqtt_id: String,
+    #[clap(long, env, help = "Discovery prefix", default_value = "homeassistant", value_parser = mqtt_topic_segment)]
+    pub mqtt_discovery_prefix: String,
     #[clap(long, env, help = "MQTT username", requires_all = ["mqtt_password"])]
     pub mqtt_username: Option<String>,
     #[clap(long, env, help = "MQTT user password")]
     pub mqtt_password: Option<String>,
 }
+
+fn mqtt_topic_segment(s: &str) -> Result<String, &'static str> {
+    if s.is_empty() {
+        Err("MQTT topic segments must not be empty")
+    } else if s.contains('/') {
+        Err("MQTT topic segments cannot contain '/'")
+    } else {
+        Ok(s.to_string())
+    }
+}

env.dist

@@ -1 +1,8 @@
 NUM_LIGHTS=89
+
+MQTT_BROKER=127.0.0.1
+MQTT_ID=pilights00
+# MQTT_PORT=1883
+# MQTT_DISCOVERY_PREFIX=homeassistant
+# MQTT_USERNAME=
+# MQTT_PASSWORD=

mqtt/Cargo.toml

@@ -9,3 +9,5 @@ rumqttc = "0.24.0"
 serde = { version = "1.0.197", features = ["derive"] }
 serde_json = "1.0.115"
 tracing = "0.1.37"
+homeassistant-mqtt-discovery = { path = "../homeassistant-mqtt-discovery/" }
+clap = { version = "4.5.4", features = ["derive"] }

mqtt/src/lib.rs

@@ -1,5 +1,5 @@
 #![feature(let_chains)]
-use common::Config;
+use common::MqttConfig;
 use rumqttc::{Client, MqttOptions, QoS};
 use std::{thread, time::Duration};
 use tracing::{info, warn};
@@ -10,24 +10,17 @@ use std::{
     sync::{mpsc::Sender, Mutex},
 };
 
-pub fn start(strip_tx: Sender<strip::Message>, config: Config) -> ProgramResult<()> {
-    info!("Starting mqtt");
+pub fn start(strip_tx: Sender<strip::Message>, config: MqttConfig) -> ProgramResult<()> {
+    info!("Starting mqtt with config {config:?}");
 
     x(&config);
 
     Ok(())
 }
 
-fn x(config: &Config) {
-    let mut mqttoptions = if let Some(mqtt_id) = config.mqtt_id.as_ref()
-        && let Some(mqtt_broker) = config.mqtt_broker.as_ref()
-        && let Some(mqtt_port) = config.mqtt_port
-    {
-        MqttOptions::new(mqtt_id, mqtt_broker, mqtt_port)
-    } else {
-        warn!("MQTT is not emabled as flags are not all set");
-        return;
-    };
+fn x(config: &MqttConfig) {
+    let mut mqttoptions = MqttOptions::new(&config.mqtt_id, &config.mqtt_broker, config.mqtt_port);
+
     mqttoptions.set_keep_alive(Duration::from_secs(5));
 
     if let Some(mqtt_username) = config.mqtt_username.as_ref()
@@ -54,11 +47,36 @@ fn x(config: &Config) {
 
     // Iterate to poll the eventloop for connection progress
     for (i, notification) in connection.iter().enumerate() {
-        info!("Notification = {:?}", notification);
+        info!("Notification #{i} = {:?}", notification);
     }
     info!("Done with mqtt");
 }
 
+use homeassistant_mqtt_discovery::{integrations::device_trigger, Common, Device};
+fn gen_discovery_message(config: MqttConfig, button_id: &str) -> device_trigger::Discovery {
+    device_trigger::Discovery {
+        common: Common {
+            device: Some(Device {
+                identifiers: Some(vec![format!("aw_lights_{}", config.mqtt_id)]),
+                ..Device::default()
+            }),
+            ..Common::default()
+        },
+        // "<discovery_prefix>/device_automation/[<node_id>/]<object_id>/config",
+        // homeassistant/device_automation/0x90fd9ffffedf1266/action_arrow_left_click/config
+        topic: format!(
+            "{}/device_automation/{}/{}/config",
+            config.mqtt_discovery_prefix, config.mqtt_id, button_id
+        ),
+        r#type: "".to_string(),
+        subtype: "".to_string(),
+        automation_type: "trigger".to_string(),
+        payload: None,
+        qos: None,
+        value_template: None,
+    }
+}
+
 // unique_id: bedroom_switch
 // name: "Bedroom Switch"
 // state_topic: "home/bedroom/switch1"

src/main.rs

@@ -77,7 +77,7 @@ fn main() -> ProgramResult<()> {
     // Mqtt user-interface
     make_child(
         message_tx.clone(),
-        move |_message_tx| -> ProgramResult<()> { mqtt::start(mqtt_strip_tx, config) },
+        move |_message_tx| -> ProgramResult<()> { mqtt::start(mqtt_strip_tx, config.mqtt.clone()) },
     );
 
     std::mem::drop(message_tx);