feat: add assets for discord embedded messages

remote/cache-service/src/api.rs

@@ -1,7 +1,8 @@
 use std::sync::Arc;
 
 use axum::extract::State;
-use axum::http::{HeaderMap, StatusCode};
+use axum::http::{HeaderMap, StatusCode, header};
+use axum::response::IntoResponse;
 use axum::Json;
 use noisebell_common::{validate_bearer, HistoryEntry, WebhookPayload};
 use tokio::sync::Mutex;
@@ -11,6 +12,10 @@ use crate::db;
 use crate::types::{DoorStatus, WebhookTarget};
 use crate::webhook;
 
+static OPEN_PNG: &[u8] = include_bytes!("../assets/open.png");
+static CLOSED_PNG: &[u8] = include_bytes!("../assets/closed.png");
+static OFFLINE_PNG: &[u8] = include_bytes!("../assets/offline.png");
+
 pub struct AppState {
     pub db: Arc<Mutex<rusqlite::Connection>>,
     pub client: reqwest::Client,
@@ -126,3 +131,86 @@ pub async fn get_history(
 
     Ok(Json(entries))
 }
+
+pub async fn get_image_open() -> impl IntoResponse {
+    ([(header::CONTENT_TYPE, "image/png"), (header::CACHE_CONTROL, "public, max-age=86400")], OPEN_PNG)
+}
+
+pub async fn get_image_closed() -> impl IntoResponse {
+    ([(header::CONTENT_TYPE, "image/png"), (header::CACHE_CONTROL, "public, max-age=86400")], CLOSED_PNG)
+}
+
+pub async fn get_image_offline() -> impl IntoResponse {
+    ([(header::CONTENT_TYPE, "image/png"), (header::CACHE_CONTROL, "public, max-age=86400")], OFFLINE_PNG)
+}
+
+pub async fn get_image(State(state): State<Arc<AppState>>) -> impl IntoResponse {
+    let db = state.db.clone();
+    let status = tokio::task::spawn_blocking(move || {
+        let conn = db.blocking_lock();
+        db::get_current_status_str(&conn)
+    })
+    .await
+    .expect("db task panicked")
+    .ok()
+    .flatten();
+
+    let image = match status.as_deref() {
+        Some("open") => OPEN_PNG,
+        Some("closed") => CLOSED_PNG,
+        _ => OFFLINE_PNG,
+    };
+    ([(header::CONTENT_TYPE, "image/png"), (header::CACHE_CONTROL, "public, max-age=5")], image)
+}
+
+pub async fn get_badge(State(state): State<Arc<AppState>>) -> impl IntoResponse {
+    let db = state.db.clone();
+    let status = tokio::task::spawn_blocking(move || {
+        let conn = db.blocking_lock();
+        db::get_current_status_str(&conn)
+    })
+    .await
+    .expect("db task panicked")
+    .ok()
+    .flatten();
+
+    let (label, color) = match status.as_deref() {
+        Some("open") => ("open", "#57f287"),
+        Some("closed") => ("closed", "#ed4245"),
+        _ => ("offline", "#99aab5"),
+    };
+
+    let label_width = 70u32;
+    let value_width = 10 + label.len() as u32 * 7;
+    let total_width = label_width + value_width;
+    let label_x = label_width as f32 / 2.0;
+    let value_x = label_width as f32 + value_width as f32 / 2.0;
+
+    let svg = format!(
+        "<svg xmlns=\"http://www.w3.org/2000/svg\" width=\"{total_width}\" height=\"20\">\
+        <linearGradient id=\"s\" x2=\"0\" y2=\"100%\">\
+        <stop offset=\"0\" stop-color=\"#bbb\" stop-opacity=\".1\"/>\
+        <stop offset=\"1\" stop-opacity=\".1\"/>\
+        </linearGradient>\
+        <clipPath id=\"r\"><rect width=\"{total_width}\" height=\"20\" rx=\"3\" fill=\"#fff\"/></clipPath>\
+        <g clip-path=\"url(#r)\">\
+        <rect width=\"{label_width}\" height=\"20\" fill=\"#555\"/>\
+        <rect x=\"{label_width}\" width=\"{value_width}\" height=\"20\" fill=\"{color}\"/>\
+        <rect width=\"{total_width}\" height=\"20\" fill=\"url(#s)\"/>\
+        </g>\
+        <g fill=\"#fff\" text-anchor=\"middle\" font-family=\"Verdana,Geneva,sans-serif\" font-size=\"11\">\
+        <text x=\"{label_x}\" y=\"15\" fill=\"#010101\" fill-opacity=\".3\">noisebell</text>\
+        <text x=\"{label_x}\" y=\"14\">noisebell</text>\
+        <text x=\"{value_x}\" y=\"15\" fill=\"#010101\" fill-opacity=\".3\">{label}</text>\
+        <text x=\"{value_x}\" y=\"14\">{label}</text>\
+        </g></svg>"
+    );
+
+    (
+        [
+            (header::CONTENT_TYPE, "image/svg+xml"),
+            (header::CACHE_CONTROL, "no-cache, max-age=0"),
+        ],
+        svg,
+    )
+}

remote/cache-service/src/main.rs

@@ -130,6 +130,11 @@ async fn main() -> Result<()> {
         .route("/status", get(api::get_status))
         .route("/info", get(api::get_info))
         .route("/history", get(api::get_history))
+        .route("/image", get(api::get_image))
+        .route("/image/open.png", get(api::get_image_open))
+        .route("/image/closed.png", get(api::get_image_closed))
+        .route("/image/offline.png", get(api::get_image_offline))
+        .route("/badge.svg", get(api::get_badge))
         .layer(
             TraceLayer::new_for_http()
                 .make_span_with(tower_http::trace::DefaultMakeSpan::new().level(Level::INFO))