Add support for iTwin Geospatial Features API

Apps/Sandcastle/gallery/iTwin Feature Service.html

@@ -63,17 +63,17 @@
         viewer.scene.camera.flyTo(birdsEyeView);
 
         // Load feature service geojson files
-        const points = await Cesium.ITwinData.createDataSourceForRealityDataId(
+        const points = await Cesium.ITwinData.loadGeospatialFeatures(
           iTwinId,
-          "57b975f6-fd92-42ba-8014-79911ed606d1",
+          "2380dc1b-1dac-4709-aa5c-f6cb38c4e9f5",
         );
-        const lines = await Cesium.ITwinData.createDataSourceForRealityDataId(
+        const lines = await Cesium.ITwinData.loadGeospatialFeatures(
           iTwinId,
-          "1099c53f-c568-48a3-a57c-0230a6f37229",
+          "613d2310-4d01-43b7-bc92-873a2ca4a4a0",
         );
-        const areas = await Cesium.ITwinData.createDataSourceForRealityDataId(
+        const areas = await Cesium.ITwinData.loadGeospatialFeatures(
           iTwinId,
-          "21eaf0d0-ab90-400f-97cf-adc455b29a78",
+          "93e7ef51-5210-49f2-92a3-c7f6685e102f",
         );
 
         // Add some styling to the lines and points to differentiate types
@@ -86,7 +86,7 @@
             Arrow_Marking: { color: Cesium.Color.YELLOW, icon: "car" },
             Road_Sign: { color: Cesium.Color.ORANGE, icon: "triangle" },
           };
-          const type = entity.properties.Type?.getValue();
+          const type = entity.properties.type?.getValue();
           if (Cesium.defined(type) && Cesium.defined(styleByType[type])) {
             const { color, icon } = styleByType[type];
             const canvas = await pinBuilder.fromMakiIconId(icon, color, 48);
@@ -103,7 +103,7 @@
             Turning_pocket: Cesium.Color.DEEPPINK,
             Yellow_Box: Cesium.Color.GOLD,
           };
-          const type = entity.properties.Type?.getValue();
+          const type = entity.properties.type?.getValue();
           if (Cesium.defined(type) && Cesium.defined(lineColorsByType[type])) {
             entity.polyline.material = lineColorsByType[type];
           }

CHANGES.md

@@ -8,6 +8,10 @@
 
 - Changed behavior of `DataSourceDisplay.ready` to always stay `true` once it is initially set to `true`. [#12429](https://github.com/CesiumGS/cesium/pull/12429)
 
+#### Additions :tada:
+
+- Add `ITwinData.loadGeospatialFeatures(iTwinId, collectionId)` function to load data from the [Geospatial Features API](https://developer.bentley.com/apis/geospatial-features/operations/get-features/) [#12449](https://github.com/CesiumGS/cesium/pull/12449)
+
 #### Fixes :wrench:
 
 - Fixed error when resetting `Cesium3DTileset.modelMatrix` to its initial value. [#12409](https://github.com/CesiumGS/cesium/pull/12409)

packages/engine/Source/Scene/ITwinData.js

@@ -6,6 +6,7 @@ import RuntimeError from "../Core/RuntimeError.js";
 import Check from "../Core/Check.js";
 import KmlDataSource from "../DataSources/KmlDataSource.js";
 import GeoJsonDataSource from "../DataSources/GeoJsonDataSource.js";
+import DeveloperError from "../Core/DeveloperError.js";
 
 /**
  * Methods for loading iTwin platform data into CesiumJS
@@ -154,7 +155,7 @@ ITwinData.createTilesetForRealityDataId = async function (
  *
  * @throws {RuntimeError} if the type of reality data is not supported by this function
  */
-ITwinData.createDataSourceForRealityDataId = async function loadRealityData(
+ITwinData.createDataSourceForRealityDataId = async function (
   iTwinId,
   realityDataId,
   type,
@@ -205,4 +206,49 @@ ITwinData.createDataSourceForRealityDataId = async function loadRealityData(
   return KmlDataSource.load(tilesetAccessUrl);
 };
 
+/**
+ * Load data from the Geospatial Features API as GeoJSON.
+ *
+ * @param {string} iTwinId The id of the iTwin to load data from
+ * @param {string} collectionId The id of the data collection to load
+ * @param {number} [limit=10000] number of items per page, must be between 1 and 10,000 inclusive
+ * @returns {Promise<GeoJsonDataSource>}
+ */
+ITwinData.loadGeospatialFeatures = async function (
+  iTwinId,
+  collectionId,
+  limit,
+) {
+  //>>includeStart('debug', pragmas.debug);
+  Check.typeOf.string("iTwinId", iTwinId);
+  Check.typeOf.string("collectionId", collectionId);
+  if (defined(limit)) {
+    Check.typeOf.number("limit", limit);
+    Check.typeOf.number.lessThanOrEquals("limit", limit, 10000);
+    Check.typeOf.number.greaterThanOrEquals("limit", limit, 1);
+  }
+  if (!defined(ITwinPlatform.defaultAccessToken)) {
+    throw new DeveloperError("Must set ITwinPlatform.defaultAccessToken first");
+  }
+  //>>includeEnd('debug')
+
+  const pageLimit = limit ?? 10000;
+
+  const tilesetUrl = `${ITwinPlatform.apiEndpoint}geospatial-features/itwins/${iTwinId}/ogc/collections/${collectionId}/items`;
+
+  const resource = new Resource({
+    url: tilesetUrl,
+    headers: {
+      Authorization: `Bearer ${ITwinPlatform.defaultAccessToken}`,
+      Accept: "application/vnd.bentley.itwin-platform.v1+json",
+    },
+    queryParameters: {
+      limit: pageLimit,
+      client: "CesiumJS",
+    },
+  });
+
+  return GeoJsonDataSource.load(resource);
+};
+
 export default ITwinData;

packages/engine/Specs/Scene/ITwinDataSpec.js

@@ -346,4 +346,67 @@ describe("ITwinData", () => {
       expect(geojsonSpy).not.toHaveBeenCalled();
     });
   });
+
+  describe("loadGeospatialFeatures", () => {
+    let geojsonSpy;
+    beforeEach(() => {
+      geojsonSpy = spyOn(GeoJsonDataSource, "load");
+    });
+
+    it("rejects with no iTwinId", async () => {
+      await expectAsync(
+        // @ts-expect-error
+        ITwinData.loadGeospatialFeatures(undefined),
+      ).toBeRejectedWithDeveloperError(
+        "Expected iTwinId to be typeof string, actual typeof was undefined",
+      );
+    });
+
+    it("rejects with no collectionId", async () => {
+      await expectAsync(
+        // @ts-expect-error
+        ITwinData.loadGeospatialFeatures("itwin-id-1", undefined),
+      ).toBeRejectedWithDeveloperError(
+        "Expected collectionId to be typeof string, actual typeof was undefined",
+      );
+    });
+
+    it("rejects with limit < 1", async () => {
+      await expectAsync(
+        ITwinData.loadGeospatialFeatures("itwin-id-1", "collection-id-1", 0),
+      ).toBeRejectedWithDeveloperError(
+        "Expected limit to be greater than or equal to 1, actual value was 0",
+      );
+    });
+
+    it("rejects with limit > 10000", async () => {
+      await expectAsync(
+        ITwinData.loadGeospatialFeatures(
+          "itwin-id-1",
+          "collection-id-1",
+          20000,
+        ),
+      ).toBeRejectedWithDeveloperError(
+        "Expected limit to be less than or equal to 10000, actual value was 20000",
+      );
+    });
+
+    it("rejects with no default access token set", async () => {
+      ITwinPlatform.defaultAccessToken = undefined;
+      await expectAsync(
+        ITwinData.loadGeospatialFeatures("itwin-id-1", "collection-id-1"),
+      ).toBeRejectedWithDeveloperError(
+        "Must set ITwinPlatform.defaultAccessToken first",
+      );
+    });
+
+    it("creates a GeoJsonDataSource from the constructed blob url if the type is GeoJSON", async () => {
+      await ITwinData.loadGeospatialFeatures("itwin-id-1", "collection-id-1");
+
+      expect(geojsonSpy).toHaveBeenCalledTimes(1);
+      expect(geojsonSpy.calls.mostRecent().args[0].url).toEqual(
+        "https://api.bentley.com/geospatial-features/itwins/itwin-id-1/ogc/collections/collection-id-1/items?limit=10000&client=CesiumJS",
+      );
+    });
+  });
 });