release: bump version to 0.53.0

frontend/public/earth/js/vessels.js

@@ -259,9 +259,10 @@ const vesselIconLayer = createInteractableLayer({
 });
 
 const DEFAULT_VESSEL_VIEWPORT = {
-  bbox: [-180, -90, 180, 90],
-  zoom: 2,
+  bbox: [-10, 50, 35, 75],
+  zoom: 4,
 };
+const MAX_VESSEL_SUBSCRIPTION_BBOX_AREA = 2500;
 
 export function getVesselMarkers() {
   return vesselIconLayer.getMarkers();
@@ -353,8 +354,34 @@ export async function loadVessels(_scene, earth, options = {}) {
   };
 }
 
-export function startVesselRealtime(earth, { onUpdate } = {}) {
+function normalizeVesselViewportOptions(options = {}) {
+  const bbox = Array.isArray(options.bbox) && options.bbox.length === 4
+    ? options.bbox.map(Number)
+    : DEFAULT_VESSEL_VIEWPORT.bbox;
+  const [lonA, latA, lonB, latB] = bbox;
+  const normalizedBbox = [
+    Math.max(-180, Math.min(lonA, lonB)),
+    Math.max(-90, Math.min(latA, latB)),
+    Math.min(180, Math.max(lonA, lonB)),
+    Math.min(90, Math.max(latA, latB)),
+  ];
+  const area = (normalizedBbox[2] - normalizedBbox[0]) * (normalizedBbox[3] - normalizedBbox[1]);
+  const safeBbox = Number.isFinite(area) && area <= MAX_VESSEL_SUBSCRIPTION_BBOX_AREA
+    ? normalizedBbox
+    : DEFAULT_VESSEL_VIEWPORT.bbox;
+  const zoom = Number.isFinite(Number(options.zoom))
+    ? Number(options.zoom)
+    : DEFAULT_VESSEL_VIEWPORT.zoom;
+  return {
+    bbox: safeBbox,
+    zoom: Math.max(1, Math.min(20, Math.round(zoom))),
+    limit: options.limit ?? VESSEL_CONFIG.maxRenderedMarkers,
+  };
+}
+
+export function startVesselRealtime(earth, { onUpdate, bbox, zoom, limit } = {}) {
   if (vesselStreamSocket || typeof WebSocket === "undefined") return;
+  const subscriptionOptions = normalizeVesselViewportOptions({ bbox, zoom, limit });
   const connect = () => {
     if (!showVessels || vesselStreamSocket) return;
     const socket = new WebSocket(getVesselStreamUrl());
@@ -369,9 +396,9 @@ export function startVesselRealtime(earth, { onUpdate } = {}) {
         type: "subscribe",
         data: {
           channel: "vessels",
-          bbox: DEFAULT_VESSEL_VIEWPORT.bbox,
-          zoom: DEFAULT_VESSEL_VIEWPORT.zoom,
-          limit: VESSEL_CONFIG.maxRenderedMarkers,
+          bbox: subscriptionOptions.bbox,
+          zoom: subscriptionOptions.zoom,
+          limit: subscriptionOptions.limit,
         },
       }));
     };