Add service-specific configuration

Switch to a section/table for the service to make it easier.

README.md

@@ -14,7 +14,9 @@ For example for My Autarco:
 [default]
 # ...
 
-# Put your solar cloud service credentials below
+# Put your solar cloud service settings below and uncomment them
+[default.service]
+kind = "MyAutarco"
 username = "foo@domain.tld"
 password = "secret"
 site_id = "abc123de"

Rocket.toml.example

@@ -3,6 +3,8 @@ address = "0.0.0.0"
 port = 2356
 
 # Put your solar cloud service settings below and uncomment them
+[default.service]
+# kind = "MyAutarco"
 # username = "foo@domain.tld"
 # password = "secret"
 # site_id = "abc123de"

src/main.rs

@@ -20,20 +20,16 @@ use serde::{Deserialize, Serialize};
 
 use self::update::update_loop;
 
-/// The configuration necessary to access a cloud service API.
-#[derive(Debug, Deserialize)]
-struct Config {
-    /// The username of the account to login with
-    username: String,
-    /// The password of the account to login with
-    password: String,
-    /// The Autarco site ID to track
-    site_id: String,
-}
-
 /// The global, concurrently accessible current status.
 static STATUS: Lazy<Mutex<Option<Status>>> = Lazy::new(|| Mutex::new(None));
 
+/// The configuration loaded additionally by Rocket.
+#[derive(Debug, Deserialize)]
+struct Config {
+    /// The service-specific configuration
+    service: services::Config,
+}
+
 /// The current photovoltaic invertor status.
 #[derive(Clone, Copy, Debug, Serialize)]
 struct Status {
@@ -60,8 +56,11 @@ fn rocket() -> _ {
         .attach(AdHoc::config::<Config>())
         .attach(AdHoc::on_liftoff("Updater", |rocket| {
             Box::pin(async move {
-                let config = rocket.figment().extract().expect("Invalid configuration");
-                let service = services::get("my_autarco", config).expect("Invalid service");
+                let config = rocket
+                    .figment()
+                    .extract::<Config>()
+                    .expect("Invalid configuration");
+                let service = services::get(config.service).expect("Invalid service");
 
                 // We don't care about the join handle nor error results?t
                 let _ = rocket::tokio::spawn(update_loop(service));

src/services.rs

@@ -4,14 +4,22 @@ pub(crate) mod my_autarco;
 
 use enum_dispatch::enum_dispatch;
 use rocket::async_trait;
+use serde::Deserialize;
 
-use crate::{Status, Config};
+use crate::Status;
+
+/// The service-specific configuration necessary to access a cloud service API.
+#[derive(Debug, Deserialize)]
+#[serde(crate = "rocket::serde", tag = "kind")]
+pub(crate) enum Config {
+    /// The configuration of the My Autarco service
+    MyAutarco(my_autarco::Config),
+}
 
 /// Retrieves the service for the provided name (if supported).
-pub(crate) fn get(service: &str, config: Config) -> color_eyre::Result<Services> {
-    match service {
-        "my_autarco" => Ok(Services::MyAutarco(my_autarco::service(config)?)),
-        _ => panic!("Unsupported service: {service}"),
+pub(crate) fn get(config: Config) -> color_eyre::Result<Services> {
+    match config {
+        Config::MyAutarco(config) => Ok(Services::MyAutarco(my_autarco::service(config)?)),
     }
 }
 

src/services/my_autarco.rs

@@ -9,7 +9,7 @@ use rocket::async_trait;
 use serde::Deserialize;
 use url::ParseError;
 
-use crate::{Status, Config};
+use crate::Status;
 
 /// The base URL of My Autarco site.
 const BASE_URL: &str = "https://my.autarco.com";
@@ -17,6 +17,17 @@ const BASE_URL: &str = "https://my.autarco.com";
 /// The interval between data polls (in seconds).
 const POLL_INTERVAL: u64 = 300;
 
+/// The configuration necessary to access the My Autarco API.
+#[derive(Debug, Deserialize)]
+pub(crate) struct Config {
+    /// The username of the account to login with
+    username: String,
+    /// The password of the account to login with
+    password: String,
+    /// The Autarco site ID to track
+    site_id: String,
+}
+
 /// Instantiates the My Autarco service.
 pub(crate) fn service(config: Config) -> Result<Service, reqwest::Error> {
     let client = ClientBuilder::new().cookie_store(true).build()?;