Implement user location validation on form submission

Author: Charanjet

Client-Side Components/Client Scripts/Dynamic Location Validation Approach/User Location Validator.js

@@ -0,0 +1,39 @@
+function onSubmit() {
+  var ga = new GlideAjax('UserLocationUtils');
+  ga.addParam('sysparm_name', 'getUserLocationCoords');
+  ga.getXMLAnswer(function(response) {
+      var locData = JSON.parse(response);
+      if (!locData) {
+          g_form.addErrorMessage("No assigned location found for your profile.");
+          return false;
+      }
+
+      navigator.geolocation.getCurrentPosition(function(position) {
+          var userLat = position.coords.latitude;
+          var userLng = position.coords.longitude;
+          var allowedLat = locData.latitude;
+          var allowedLng = locData.longitude;
+          var locName = locData.name;
+
+          var R = 6371;
+          var dLat = (userLat - allowedLat) * Math.PI / 180;
+          var dLng = (userLng - allowedLng) * Math.PI / 180;
+          var a = Math.sin(dLat / 2) ** 2 +
+                  Math.cos(allowedLat * Math.PI / 180) *
+                  Math.cos(userLat * Math.PI / 180) *
+                  Math.sin(dLng / 2) ** 2;
+          var c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
+          var distance = R * c;
+
+          if (distance > 10) { // 10 km tolerance
+              alert("You are " + distance.toFixed(2) + " km away from your registered office: " + locName);
+              g_form.addErrorMessage("Location validation failed.");
+              return false;
+          } else {
+              g_form.addInfoMessage("Location validated successfully within range of " + locName);
+              return true;
+          }
+      });
+  });
+  return false; // Wait for async location validation
+}