server/src/eventHandler/ttnMessageReceivedEventHandler.ts

@@ -11,6 +11,119 @@ import { getLocationForWifiMemoized } from "../proxy/wigle";
 const locationService = container.resolve(LocationService);
 const wifiScanService = container.resolve(WifiScanService);
 
+const CalculateTtnGatewayLocation = async (event: TtnMessageReceivedEvent) => {
+  // Get location based on TTN Gateways
+  const virtualLocation = {
+    latitude: undefined as number | undefined,
+    longitude: undefined as number | undefined,
+  };
+
+  if (!event.ttnGateways || event.ttnGateways.length === 0) {
+    console.log("No TTN Gateway location received!")
+  } else {
+    let totalWeight = 0;
+    let weightedLatitude = 0;
+    let weightedLongitude = 0;
+
+    event.ttnGateways.forEach(gw => {
+      const weight = 1 / Math.abs(gw.rssi); // Higher RSSI (closer to 0) gives more weight
+      totalWeight += weight;
+      weightedLatitude += gw.latitude * weight;
+      weightedLongitude += gw.longitude * weight;
+    });
+
+    // Calculate the weighted average to get the virtual location
+    const virtualLocation = {
+      latitude: weightedLatitude / totalWeight,
+      longitude: weightedLongitude / totalWeight
+    };
+
+    console.log("Tracker location based on TTN Gateway location:", virtualLocation);
+  }
+  return {
+    ttn_latitude: virtualLocation.latitude,
+    ttn_longitude: virtualLocation.longitude,
+  };
+};
+
+const CalculateWifiLocation = async (event: TtnMessageReceivedEvent) => {
+  // Get location based on WiFi Scans
+  const virtualLocation = {
+    latitude: undefined as number | undefined,
+    longitude: undefined as number | undefined,
+  };
+
+  if (!event.wifis || event.wifis.length === 0) {
+    console.log("No WiFi scans received!")
+  } else {
+    // Process Wi-Fi data to compute weighted location
+    const wifiScans = await Promise.all(
+      event.wifis.map(async (wifi) => {
+        // Create new WiFi Scan entry if wigle.net reported location
+        const apiResponse = await getLocationForWifiMemoized(wifi.mac);
+        return {
+          lp_ttn_end_device_uplinks_id: event.lp_ttn_end_device_uplinks_id,
+          mac: wifi.mac,
+          rssi: wifi.rssi,
+          latitude: apiResponse?.results[0]?.trilat,
+          longitude: apiResponse?.results[0]?.trilong,
+        };
+      })
+    );
+
+    await wifiScanService.createWifiScans(wifiScans);
+
+    const { totalWeight, weightedLatitude, weightedLongitude } =
+      wifiScans.reduce(
+        (acc, { latitude, longitude, rssi }) => {
+          if (latitude && longitude && rssi !== 0) {
+            const weight = 1 / Math.abs(rssi);
+
+            acc.totalWeight += weight;
+            acc.weightedLatitude += latitude * weight;
+            acc.weightedLongitude += longitude * weight;
+          }
+
+          return acc;
+        },
+        {
+          totalWeight: 0,
+          weightedLatitude: 0,
+          weightedLongitude: 0,
+        }
+      );
+
+    // Calculate the weighted average to get the virtual location
+    virtualLocation.latitude = weightedLatitude / totalWeight;
+    virtualLocation.longitude = weightedLongitude / totalWeight;
+
+    console.log("Tracker location based on WiFi Scan location:", virtualLocation);
+  }
+  return {
+    wifi_latitude: virtualLocation.latitude,
+    wifi_longitude: virtualLocation.longitude,
+  };
+};
+
+const CalculateGnssLocation = async (event: TtnMessageReceivedEvent) => {
+  // Default virtual location with undefined coordinates
+  const virtualLocation = {
+    latitude: undefined as number | undefined,
+    longitude: undefined as number | undefined,
+  };
+
+  if (virtualLocation.latitude === undefined || virtualLocation.longitude === undefined) {
+    console.log("No valid GNSS location received!");
+  }
+
+  return {
+    gnss_latitude: virtualLocation.latitude,
+    gnss_longitude: virtualLocation.longitude,
+  };
+};
+
+
+
 domainEventEmitter.on(
   TtnMessageReceivedEventName,
   async (event: TtnMessageReceivedEvent) => {
@@ -23,83 +136,21 @@ domainEventEmitter.on(
     var ttn_gw_based_latitude: number | undefined = undefined;
     var ttn_gw_based_longitude: number | undefined = undefined;
 
-    // Get location based on TTN Gateways
+    if (event.ttnGateways && event.ttnGateways.length > 0) {
-    if (!event.ttnGateways || event.ttnGateways.length === 0) {
+      const virtualLocation = await CalculateTtnGatewayLocation(event);
-      console.log("No TTN Gateway location received!")
+      ttn_gw_based_latitude = virtualLocation.ttn_latitude;
-    } else {
+      ttn_gw_based_longitude = virtualLocation.ttn_longitude;
-      let totalWeight = 0;
-      let weightedLatitude = 0;
-      let weightedLongitude = 0;
-
-      event.ttnGateways.forEach(gw => {
-        const weight = 1 / Math.abs(gw.rssi); // Higher RSSI (closer to 0) gives more weight
-        totalWeight += weight;
-        weightedLatitude += gw.latitude * weight;
-        weightedLongitude += gw.longitude * weight;
-      });
-
-      // Calculate the weighted average to get the virtual location
-      const virtualLocation = {
-        latitude: weightedLatitude / totalWeight,
-        longitude: weightedLongitude / totalWeight
-      };
-
-      console.log("Tracker location based on TTN Gateway location:", virtualLocation);
-      ttn_gw_based_latitude = virtualLocation.latitude;
-      ttn_gw_based_longitude = virtualLocation.longitude;
     }
 
-    // Get location based on WiFi Scans
+    if (event.wifis && event.wifis.length > 0) {
-    if (!event.wifis || event.wifis.length === 0) {
+      const virtualLocation = await CalculateWifiLocation(event);
-      console.log("No WiFi scans received!")
+      wifi_based_latitude = virtualLocation.wifi_latitude;
-    } else {
+      wifi_based_longitude = virtualLocation.wifi_longitude;
-      let totalWeight = 0;
-      let weightedLatitude = 0;
-      let weightedLongitude = 0;
-
-      // Process Wi-Fi data to compute weighted location
-      await Promise.all(
-        event.wifis.map(async (wifi) => {
-          const apiResponse = await getLocationForWifiMemoized(wifi.mac);
-          if ((apiResponse != undefined) && (apiResponse?.totalResults > 0)) {
-            // Create new WiFi Scan entry if wigle.net reported location
-            const newWifiScan = wifiScanService.createWifiScan({
-              lp_ttn_end_device_uplinks_id: event.lp_ttn_end_device_uplinks_id,
-              mac: wifi.mac,
-              rssi: wifi.rssi,
-              latitude: apiResponse?.results[0]?.trilat,
-              longitude: apiResponse?.results[0]?.trilong,
-            })
-
-            // Calculate weight based on RSSI (higher signal strength gives more weight)
-            const weight = 1 / Math.abs((await newWifiScan).rssi);
-            totalWeight += weight;
-
-            // Accumulate weighted latitude and longitude
-            weightedLatitude += (await newWifiScan).latitude * weight;
-            weightedLongitude += (await newWifiScan).longitude * weight;
-          }
-        })
-      );
-
-      // Calculate the weighted average to get the virtual location
-      const virtualLocation = {
-        latitude: weightedLatitude / totalWeight,
-        longitude: weightedLongitude / totalWeight
-      };
-
-      console.log("Tracker location based on WiFi Scan location:", virtualLocation);
-      wifi_based_latitude = virtualLocation.latitude;
-      wifi_based_longitude = virtualLocation.longitude;
     }
 
-    // Get location based on GNSS
+    const virtualLocation = await CalculateGnssLocation(event);
-    if ((event.gnssLocation.latitude) && (event.gnssLocation.longitude)) {
+    gnss_based_latitude = virtualLocation.gnss_latitude;
-      gnss_based_latitude = event.gnssLocation.latitude;
+    gnss_based_longitude = virtualLocation.gnss_longitude;
-      gnss_based_longitude = event.gnssLocation.longitude;
-    } else {
-      console.log("No GNSS location received!")
-    }
 
     const newLocation = await locationService.createLocation({
       lp_ttn_end_device_uplinks_id: event.lp_ttn_end_device_uplinks_id,