Add webserver

Cargo.toml

@@ -14,3 +14,4 @@ serde_json = "1.0"
 futures = "0.3.28"
 tokio = { version = "1.32.0", features=["macros", "rt-multi-thread"] }
 chrono = "0.4.31"
+actix-web = "4.4.0"

src/devices.rs

@@ -2,7 +2,7 @@ use std::fs;
 
 use anyhow::Result;
 use serde::{Deserialize, Serialize};
-use serde_json::{from_str, to_string_pretty};
+use serde_json::{from_str, to_string, to_string_pretty};
 
 #[derive(Clone, PartialEq, Eq, Deserialize, Serialize, Debug)]
 pub struct Devices {
@@ -14,6 +14,10 @@ impl Devices {
         Ok(from_str(&fs::read_to_string(file)?)?)
     }
 
+    pub fn to_json(&self) -> Result<String> {
+        Ok(to_string(self)?)
+    }
+
     #[allow(unused)]
     pub fn save(&self, file: &str) -> Result<()> {
         fs::write(file, to_string_pretty(self)?)?;

src/main.rs

@@ -10,16 +10,70 @@ mod data;
 mod db;
 mod devices;
 mod tasmota;
+mod web_server;
 
+use actix_web::{
+    get, middleware, rt,
+    web::{self, Data},
+    App, HttpRequest, HttpServer,
+};
 use anyhow::Result;
 use devices::Devices;
-use futures::{future::try_join_all, try_join};
+use futures::{future::try_join_all, try_join, Future};
 use tasmota::Tasmota;
+use web_server::{device_query, index, plug_state};
 
 fn since_epoch() -> Result<u64> {
     Ok(SystemTime::now().duration_since(UNIX_EPOCH)?.as_secs())
 }
 
+fn read_power_usage(
+    tasmota_plugs: Vec<Tasmota>,
+    db: Arc<Mutex<DataBase>>,
+) -> impl Future<Output = Result<()>> {
+    async move {
+        loop {
+            try_join_all(tasmota_plugs.iter().map(|plug| async {
+                if let Ok(usage) = plug.read_power_usage().await {
+                    db.lock()
+                        .unwrap()
+                        .write(plug.name(), since_epoch()?, usage)?;
+
+                    println!("read {}", plug.name(),);
+                }
+
+                Ok::<(), anyhow::Error>(())
+            }))
+            .await?;
+
+            thread::sleep(Duration::from_secs(3));
+        }
+    }
+}
+
+async fn run_web_server(
+    devices: Devices,
+    plugs: Vec<Tasmota>,
+    db: Arc<Mutex<DataBase>>,
+) -> Result<()> {
+    HttpServer::new(move || {
+        App::new()
+            .app_data(Data::new(devices.clone()))
+            .app_data(Data::new(db.clone()))
+            .app_data(Data::new(plugs.clone()))
+            .service(index)
+            .service(device_query)
+            .service(plug_state)
+            .service(change_plug_state)
+    })
+    .bind(("127.0.0.1", 8062))
+    .map_err(|err| anyhow::Error::msg(format!("failed binding to address: {err:#?}")))?
+    .run()
+    .await?;
+
+    Ok(())
+}
+
 #[tokio::main]
 async fn main() -> Result<()> {
     let db_future = DataBase::new("home_server.db");
@@ -28,25 +82,17 @@ async fn main() -> Result<()> {
     let (db, devices) = try_join!(db_future, devices_future)?;
 
     let shared_db = Arc::new(Mutex::new(db));
+
     let tasmota_plugs: Vec<Tasmota> = devices
         .plugs
         .iter()
         .map(|plug| Tasmota::new(plug))
         .collect();
 
-    loop {
-        try_join_all(tasmota_plugs.iter().map(|plug| async {
-            if let Ok(usage) = plug.read_power_usage().await {
-                shared_db
-                    .lock()
-                    .unwrap()
-                    .write(plug.name(), since_epoch()?, usage)?;
-            }
+    let res = try_join!(
+        read_power_usage(tasmota_plugs.clone(), shared_db.clone()),
+        run_web_server(devices, tasmota_plugs, shared_db)
+    )?;
 
-            Ok::<(), anyhow::Error>(())
-        }))
-        .await?;
-
-        thread::sleep(Duration::from_secs(3));
-    }
+    Ok(())
 }

src/tasmota.rs

@@ -2,6 +2,7 @@ use anyhow::Result;
 use serde::Deserialize;
 use serde_json::from_str;
 
+#[derive(Debug, Clone)]
 pub struct Tasmota {
     device: String,
 }

src/web_server.rs

@@ -0,0 +1,124 @@
+use actix_web::{
+    get, post,
+    web::{Data, Json, Path},
+    HttpRequest, Responder, ResponseError,
+};
+use serde::Serialize;
+use serde_json::to_string;
+
+use crate::{devices::Devices, tasmota::Tasmota};
+
+use std::fmt::{Display, Formatter, Result as FmtResult};
+
+#[derive(Serialize)]
+struct DeviceState {
+    name: String,
+    power: bool,
+    led: bool,
+    power_draw: f32,
+}
+
+#[derive(Debug)]
+struct MyError {
+    msg: String,
+}
+
+impl Display for MyError {
+    fn fmt(&self, f: &mut Formatter<'_>) -> FmtResult {
+        write!(f, "Error: {}", self.msg)
+    }
+}
+
+impl ResponseError for MyError {}
+
+impl From<anyhow::Error> for MyError {
+    fn from(value: anyhow::Error) -> Self {
+        MyError {
+            msg: value.to_string(),
+        }
+    }
+}
+
+#[get("/")]
+async fn index(req: HttpRequest) -> &'static str {
+    println!("REQ: {:?}", req);
+    "Hello world!\r\n"
+}
+
+#[get("/devices")]
+async fn device_query(devices: Data<Devices>) -> Result<impl Responder, impl ResponseError> {
+    devices
+        .to_json()
+        .map(|json| Json(json))
+        .map_err(|err| MyError::from(err))
+}
+
+async fn tasmota_info(tasmota: &Tasmota) -> anyhow::Result<String> {
+    let led = tasmota.led_state().await?;
+    let power = tasmota.power_state().await?;
+    let power_draw = tasmota.read_power_usage().await?;
+
+    Ok(to_string(&DeviceState {
+        name: tasmota.name().to_string(),
+        power,
+        led,
+        power_draw,
+    })?)
+}
+
+#[get("/plug_state/{plug}")]
+async fn plug_state(
+    plug: Path<String>,
+    plugs: Data<Vec<Tasmota>>,
+) -> Result<impl Responder, impl ResponseError> {
+    let plug_name = plug.into_inner();
+
+    if let Some(tasmota) = plugs.iter().find(|tasmota| tasmota.name() == plug_name) {
+        return Ok(tasmota_info(tasmota)
+            .await
+            .map(|s| Json(s))
+            .map_err(|err| MyError::from(err))?);
+    }
+
+    Err(MyError {
+        msg: format!("plug ({plug_name}) not found"),
+    })
+}
+
+#[post("/plug/{plug}/{action}")]
+async fn change_plug_state(
+    plug: Path<String>,
+    action: Path<String>,
+    plugs: Data<Vec<Tasmota>>,
+) -> Result<impl Responder, impl ResponseError> {
+    let plug_name = plug.into_inner();
+
+    if let Some(tasmota) = plugs.iter().find(|tasmota| tasmota.name() == plug_name) {
+        match action.into_inner().as_str() {
+            "led_on" => tasmota
+                .turn_on_led()
+                .await
+                .map_err(|err| MyError::from(err))?,
+            "led_off" => tasmota
+                .turn_off_led()
+                .await
+                .map_err(|err| MyError::from(err))?,
+            "power_on" => tasmota
+                .switch_on()
+                .await
+                .map_err(|err| MyError::from(err))?,
+            "power_off" => tasmota
+                .switch_off()
+                .await
+                .map_err(|err| MyError::from(err))?,
+
+            _ => (),
+        }
+
+        return Ok("Ok");
+    }
+
+    Err(MyError {
+        msg: format!("plug ({plug_name}) not found"),
+    })
+}