From 54d6e875fb541ce1e0da84128d5fd29546e423b9 Mon Sep 17 00:00:00 2001
From: "Matthias P. Braendli" <matthias.braendli@mpb.li>
Date: Wed, 3 Jan 2024 21:11:11 +0100
Subject: Move UI into src/ui

---
 src/ui.rs | 230 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 230 insertions(+)
 create mode 100644 src/ui.rs

(limited to 'src/ui.rs')

diff --git a/src/ui.rs b/src/ui.rs
new file mode 100644
index 0000000..aebcd4a
--- /dev/null
+++ b/src/ui.rs
@@ -0,0 +1,230 @@
+use std::str::FromStr;
+use serde::Deserialize;
+use askama::Template;
+use axum::{
+    extract::State,
+    routing::get,
+    Router,
+    response::Html,
+    Form,
+    http::StatusCode,
+};
+use tower_http::services::ServeDir;
+
+use crate::config;
+use crate::SharedState;
+
+pub async fn serve(port: u16, shared_state: SharedState) {
+    let app = Router::new()
+        .route("/", get(dashboard))
+        .route("/incoming", get(incoming))
+        .route("/send", get(send))
+        .route("/settings", get(show_settings).post(post_settings))
+        .nest_service("/static", ServeDir::new("static"))
+        /* requires tracing and tower, e.g.
+         *  tower = { version = "0.4", features = ["util", "timeout"] }
+         *  tower-http = { version = "0.5.0", features = ["add-extension", "trace"] }
+         *  tracing = "0.1"
+         *  tracing-subscriber = { version = "0.3", features = ["env-filter"] }
+         .layer(
+         ServiceBuilder::new()
+         .layer(HandleErrorLayer::new(|error: BoxError| async move {
+         ,if error.is::<tower::timeout::error::Elapsed>() {
+         Ok(StatusCode::REQUEST_TIMEOUT)
+         } else {
+         Err((
+         StatusCode::INTERNAL_SERVER_ERROR,
+         format!("Unhandled internal error: {error}"),
+         ))
+         }
+         }))
+         .timeout(Duration::from_secs(10))
+         .layer(TraceLayer::new_for_http())
+         .into_inner(),
+         )*/
+        .with_state(shared_state);
+
+    let listener = tokio::net::TcpListener::bind(("0.0.0.0", port)).await.unwrap();
+    axum::serve(listener, app).await.unwrap()
+}
+
+#[derive(PartialEq)]
+enum ActivePage {
+    Dashboard,
+    Incoming,
+    Send,
+    Settings,
+}
+
+#[derive(Template)]
+#[template(path = "dashboard.html")]
+struct DashboardTemplate<'a> {
+    title: &'a str,
+    page: ActivePage,
+    conf: config::Config,
+}
+
+async fn dashboard(State(state): State<SharedState>) -> DashboardTemplate<'static> {
+    DashboardTemplate {
+        title: "Dashboard",
+        conf: state.lock().unwrap().conf.clone(),
+        page: ActivePage::Dashboard,
+    }
+}
+
+#[derive(Template)]
+#[template(path = "incoming.html")]
+struct IncomingTemplate<'a> {
+    title: &'a str,
+    page: ActivePage,
+    conf: config::Config,
+}
+
+async fn incoming(State(state): State<SharedState>) -> IncomingTemplate<'static> {
+    IncomingTemplate {
+        title: "Incoming",
+        conf: state.lock().unwrap().conf.clone(),
+        page: ActivePage::Incoming,
+    }
+}
+
+#[derive(Template)]
+#[template(path = "send.html")]
+struct SendTemplate<'a> {
+    title: &'a str,
+    page: ActivePage,
+    conf: config::Config,
+}
+
+async fn send(State(state): State<SharedState>) -> SendTemplate<'static> {
+    SendTemplate {
+        title: "Send",
+        conf: state.lock().unwrap().conf.clone(),
+        page: ActivePage::Send,
+    }
+}
+
+#[derive(Template)]
+#[template(path = "settings.html")]
+struct SettingsTemplate<'a> {
+    title: &'a str,
+    page: ActivePage,
+    conf: config::Config,
+}
+
+async fn show_settings(State(state): State<SharedState>) -> SettingsTemplate<'static> {
+    SettingsTemplate {
+        title: "Settings",
+        page: ActivePage::Settings,
+        conf: state.lock().unwrap().conf.clone(),
+    }
+}
+
+#[derive(Deserialize, Debug)]
+struct FormConfig {
+    callsign: String,
+    ssid: String,
+    icon: String,
+
+    // felinet
+    // felinet_enabled is either "on" or absent.
+    // According to https://developer.mozilla.org/en-US/docs/Web/HTML/Element/Input/checkbox
+    // "If the value attribute was omitted, the default value for the checkbox is `on` [...]"
+    felinet_enabled: Option<String>,
+    address: String,
+
+    // beacon
+    period_seconds: config::DurationSeconds,
+    max_hops: u8,
+    latitude: String,
+    longitude: String,
+    altitude: String,
+    comment: String,
+    antenna_height: String,
+    antenna_gain: String,
+    tx_power: String,
+
+    // tunnel
+    tunnel_enabled: Option<String>,
+    local_ip: String,
+    netmask: String,
+}
+
+fn empty_string_to_none<T: FromStr + Sync>(value: &str) -> Result<Option<T>, T::Err> {
+    if value == "" {
+        Ok(None)
+    }
+    else {
+        Ok(Some(value.parse()?))
+    }
+}
+
+impl TryFrom<FormConfig> for config::Config {
+    type Error = anyhow::Error;
+
+    fn try_from(value: FormConfig) -> Result<Self, Self::Error> {
+        Ok(config::Config {
+            callsign: value.callsign,
+            ssid: value.ssid.parse()?,
+            icon: value.icon.parse()?,
+            felinet: config::FelinetConfig {
+                enabled: value.felinet_enabled.is_some(),
+                address: value.address,
+            },
+            beacon: config::BeaconConfig {
+                period_seconds: value.period_seconds,
+                max_hops: value.max_hops,
+                latitude: empty_string_to_none(&value.latitude)?,
+                longitude: empty_string_to_none(&value.longitude)?,
+                altitude: empty_string_to_none(&value.altitude)?,
+                comment: empty_string_to_none(&value.comment)?,
+                antenna_height: empty_string_to_none(&value.antenna_height)?,
+                antenna_gain: empty_string_to_none(&value.antenna_gain)?,
+                tx_power: empty_string_to_none(&value.tx_power)?,
+            },
+            tunnel: config::TunnelConfig {
+                enabled: value.tunnel_enabled.is_some(),
+                local_ip: value.local_ip,
+                netmask: value.netmask,
+            },
+        })
+    }
+}
+
+async fn post_settings(State(state): State<SharedState>, Form(input): Form<FormConfig>) -> (StatusCode, Html<String>) {
+    match config::Config::try_from(input) {
+        Ok(c) => {
+            match c.store() {
+                Ok(()) => {
+                    state.lock().unwrap().conf.clone_from(&c);
+
+                    (StatusCode::OK, Html(
+                            r#"<!doctype html>
+                            <html><head></head><body>
+                            <p>Configuration updated</p>
+                            <p>To <a href="/">dashboard</a></p>
+                            </body></html>"#.to_owned()))
+                }
+                Err(e) => {
+                    (StatusCode::INTERNAL_SERVER_ERROR, Html(
+                            format!(r#"<!doctype html>
+                            <html><head></head>
+                            <body><p>Internal Server Error: Could not write config</p>
+                            <p>{}</p>
+                            </body>
+                            </html>"#, e)))
+                },
+            }
+
+        },
+        Err(e) => {
+            (StatusCode::BAD_REQUEST, Html(
+                    format!(r#"<!doctype html>
+                            <html><head></head>
+                            <body><p>Error interpreting POST data</p>
+                            <p>{}</p>
+                            </body>
+                            </html>"#, e)))
+        },
+    }
+}
-- 
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