limit max domain

frontend/src/components/mainPage.js

@@ -101,16 +101,28 @@ export default function MainPage() {
   }
 
   // Return the maximum datetime as an integer in milliseconds in the domain of a dataset
-  function getDomainMax(newHeatData) {
-    let domainMax = 0;
-    newHeatData.forEach(set => {
-      if(set.length > 0 && (new Date(set[set.length - 1].datetime).getTime() > domainMax)) {
-        domainMax = new Date(set[set.length - 1].datetime).getTime();
+function getDomainMax(newHeatData) {
+  const targetDate = new Date("2021-10-01").getTime(); // Maximum allowed date: 1-10-21
+  let domainMax = 0;
+  
+  newHeatData.forEach(set => {
+    if (set.length > 0) {
+      let index = set.length - 1;
+      while (index >= 0 && new Date(set[index].datetime).getTime() >= targetDate) {
+        index--;
       }
-    });
-    if (domainMax === 0) return "auto";
-    return domainMax;
-  }
+      if (index >= 0) {
+        const currentDateTime = new Date(set[index].datetime).getTime();
+        if (currentDateTime > domainMax) {
+          domainMax = currentDateTime;
+        }
+      }
+    }
+  });
+
+  if (domainMax === 0) return "auto";
+  return domainMax;
+}
 
   // GET the metadata from the backend
   async function getMetaData() {