Export and use new function in Cesium app

public/js/appCesium.js

@@ -12,6 +12,7 @@ import {
   formatSTAResponseForLineChart,
   drawLineChartHC,
   getCombinedObservationsFromAllNextLinks,
+  getMetadataPlusObservationsForChart,
 } from "./appChart.js";
 
 // Constants
@@ -313,12 +314,34 @@ const activate3DTileFeaturePicking = function () {
     );
 
     // Get "ALL" the Observations that satisfy our query
-    getCombinedObservationsFromAllNextLinks(
+    // getCombinedObservationsFromAllNextLinks(
+    //   axiosGetRequest(URL_OBSERVATIONS, QUERY_PARAMS_COMBINED)
+    // )
+    //   .then((observationArr) => {
+    //     drawHeatMapHC(formatSTAResponseForHeatMap(observationArr));
+    //     drawLineChartHC(formatSTAResponseForLineChart(observationArr));
+    //   })
+    //   .catch((err) => {
+    //     console.log(err);
+    //   });
+
+    const promiseDatastreamMetadata = getDatastreamMetadata(URL_DATASTREAM);
+    const promiseCombinedObservations = getCombinedObservationsFromAllNextLinks(
       axiosGetRequest(URL_OBSERVATIONS, QUERY_PARAMS_COMBINED)
-    )
-      .then((observationArr) => {
-        drawHeatMapHC(formatSTAResponseForHeatMap(observationArr));
-        drawLineChartHC(formatSTAResponseForLineChart(observationArr));
+    );
+    getMetadataPlusObservationsForChart([
+      promiseCombinedObservations,
+      promiseDatastreamMetadata,
+    ])
+      .then((metadataAndObs) => {
+        // Extract the metadata and the observations from resulting array
+        const combinedObs = metadataAndObs[0];
+        const datastreamMetadata = metadataAndObs[1];
+
+        drawHeatMapHC(
+          formatSTAResponseForHeatMap(combinedObs),
+          datastreamMetadata
+        );
       })
       .catch((err) => {
         console.log(err);

public/js/appChart.js

@@ -393,7 +393,9 @@ export const getCombinedObservationsFromAllNextLinks = function (
     });
 };
 
-const getMetadataPlusObservationsForChart = async function (promiseArray) {
+export const getMetadataPlusObservationsForChart = async function (
+  promiseArray
+) {
   const combinedResolvedPromises = [];
 
   for (const promise of promiseArray) {