From c58bc9864b401a32eabd024f6c772291cc28cf6c Mon Sep 17 00:00:00 2001
From: German Khokhlov <ouchlock@gmail.com>
Date: Wed, 28 Oct 2026 09:47:40 +0400
Subject: [PATCH] refactor(installations): make model engine neutral

---
 scripts/package-boundaries.json         |  1 +
 src/layers/installations/model.js       | 11 +++---
 src/layers/installations/model.test.mjs | 45 +++++++++++++++++++++++++
 src/layers/installations/state.js       |  3 +-
 4 files changed, 52 insertions(+), 8 deletions(-)
 create mode 100644 src/layers/installations/model.test.mjs

diff --git a/scripts/package-boundaries.json b/scripts/package-boundaries.json
index d7181b767..171c65dd2 100644
--- a/scripts/package-boundaries.json
+++ b/scripts/package-boundaries.json
@@ -1257,6 +1257,7 @@
       "src/layers/installations/source.js",
       "src/layers/installations/state.js",
       "src/layers/installations/viewport.js",
+      "src/layers/shared/color.js",
       "src/data/inputOwnership.js",
       "src/data/tomtomTiles.js",
       "src/sources/capability.js",
diff --git a/src/layers/installations/model.js b/src/layers/installations/model.js
index 19e10098b..e5aad2730 100644
--- a/src/layers/installations/model.js
+++ b/src/layers/installations/model.js
@@ -1,5 +1,6 @@
 import { installationResponseSaturated } from './source.js';
-import * as Cesium from 'cesium';
+import * as geo from '../../geo/index.js';
+import { rgbaFromCss } from '../shared/color.js';
 import {
   EARTH_MEAN_RADIUS_M,
   COLOR_BY_CLASS,
@@ -18,8 +19,8 @@ export function createModel({ state: layerState, services, parts, source }) {
     latitudeBDeg,
     longitudeBDeg,
   ) {
-    const latitudeBRad = Cesium.Math.toRadians(latitudeBDeg);
-    const longitudeBRad = Cesium.Math.toRadians(longitudeBDeg);
+    const latitudeBRad = geo.math.toRadians(latitudeBDeg);
+    const longitudeBRad = geo.math.toRadians(longitudeBDeg);
     const latitudeDelta = latitudeBRad - latitudeARad;
     const longitudeDelta = Math.atan2(
       Math.sin(longitudeBRad - longitudeARad),
@@ -39,9 +40,7 @@ export function createModel({ state: layerState, services, parts, source }) {
   }
 
   function colorFor(record) {
-    return Cesium.Color.fromCssColorString(
-      COLOR_BY_CLASS[record.class] || '#9ca6b0',
-    );
+    return rgbaFromCss(COLOR_BY_CLASS[record.class] || '#9ca6b0');
   }
 
   /**
diff --git a/src/layers/installations/model.test.mjs b/src/layers/installations/model.test.mjs
new file mode 100644
index 000000000..ebd1a76e3
--- /dev/null
+++ b/src/layers/installations/model.test.mjs
@@ -0,0 +1,45 @@
+import test from 'node:test';
+import assert from 'node:assert/strict';
+import * as geo from '../../geo/index.js';
+import { createModel } from './model.js';
+
+const model = createModel({ state: {}, services: {}, parts: {}, source: {} });
+
+test('installation distance prefilter wraps the date line and stays conservative at high latitudes', () => {
+  const from = geo.math.toRadians(179.8);
+  const distance = model.approximateSurfaceDistanceM(
+    geo.math.toRadians(70),
+    from,
+    69.9,
+    -179.8,
+  );
+  const start = geo.cartographic.fromDegrees(179.8, 70);
+  const end = geo.cartographic.fromDegrees(-179.8, 69.9);
+  const exact = geo.ellipsoidGeodesic.create(start, end).surfaceDistance;
+
+  assert.ok(distance > 0 && distance < 50_000);
+  assert.ok(distance >= exact * 0.99);
+  assert.ok(distance <= exact * 1.03);
+});
+
+test('installation model returns engine-neutral palette and source presentation', () => {
+  const record = {
+    class: 'military_land',
+    sources: [
+      { name: 'OpenStreetMap', id: 'way:1' },
+      { name: 'OpenStreetMap', id: 'relation:2' },
+      { name: 'Bundled registry', id: 'registry:3' },
+    ],
+  };
+
+  assert.deepEqual(model.colorFor(record).rgba(), [
+    156 / 255,
+    166 / 255,
+    176 / 255,
+    1,
+  ]);
+  assert.equal(
+    model.installationSourceLabel(record),
+    'OpenStreetMap + Bundled registry',
+  );
+});
diff --git a/src/layers/installations/state.js b/src/layers/installations/state.js
index 24ffc6e8f..d07ce006c 100644
--- a/src/layers/installations/state.js
+++ b/src/layers/installations/state.js
@@ -1,4 +1,3 @@
-import * as Cesium from 'cesium';
 import * as geo from '../../geo/index.js';
 
 export function createState({ services }) {
@@ -6,7 +5,7 @@ export function createState({ services }) {
 
   state.distanceEndpointScratch = geo.cartographic.create();
 
-  state.distanceGeodesicScratch = new Cesium.EllipsoidGeodesic();
+  state.distanceGeodesicScratch = geo.ellipsoidGeodesic.create();
 
   Object.assign(state, {
     viewer: null,