refactor: easy polylabel algorithm to view polygon label

src/uhm/lib/map/constants.ts

@@ -8,4 +8,5 @@ export const RASTER_BASE_LAYER_ID = "raster-base-layer";
 export const RASTER_BASE_INSERT_BEFORE_LAYER_ID = "graticules-line";
 
 export const PATH_ARROW_SOURCE_ID = "path-arrow-shapes";
+export const POLYGON_LABEL_SOURCE_ID = "polygon-labels";
 export const FEATURE_STATE_SOURCE_IDS = ["countries", "places", PATH_ARROW_SOURCE_ID] as const;

src/uhm/lib/map/styles/geotypes/index.ts

@@ -29,6 +29,7 @@ import { getCastleLayers } from "./castle";
 import { getRuinLayers } from "./ruin";
 import { getPortLayers } from "./port";
 import { getBridgeLayers } from "./bridge";
+import { getPolygonLabelLayers } from "./polygonLabels";
 
 import { LayerSpecification } from "maplibre-gl";
 
@@ -63,3 +64,9 @@ export function getAllGeotypeLayers(sourceId: string, pathArrowSourceId?: string
         ...getBridgeLayers(sourceId, pathArrowSourceId, pointSourceId)
     ];
 }
+
+export function getAllGeotypeLabelLayers(polygonLabelSourceId: string): LayerSpecification[] {
+    return [
+        ...getPolygonLabelLayers(polygonLabelSourceId),
+    ];
+}