ETA use case

src/CoordinatesFunctions.java

@@ -0,0 +1,54 @@
+// Java program for the haversine formula
+public class CoordinatesFunctions {
+
+    // private final double GOTRAINSPEED = 38.88; // 140(km/hr) = 38.88(m/s)
+
+    /**
+     * Takes the Longitude and Latitude of two points and solves for distance.
+     *
+     * @param lat1
+     * @param lon1
+     * @param lat2
+     * @param lon2
+     * @return distance
+     */
+    static double haversineDistance(double lat1, double lon1,
+                                    double lat2, double lon2)
+    {
+        /**
+         * The distance between latitudes and longitudes
+         */
+        double distanceLatitude = Math.toRadians(lat2 - lat1);
+        double distanceLongitude = Math.toRadians(lon2 - lon1);
+
+        /**
+         * Convert to Radians
+         */
+        lat1 = Math.toRadians(lat1);
+        lat2 = Math.toRadians(lat2);
+
+        /**
+         * Using Haversine to compute distance between the two
+         */
+        double a = Math.pow(Math.sin(distanceLatitude / 2), 2) +
+                Math.pow(Math.sin(distanceLongitude / 2), 2) *
+                        Math.cos(lat1) *
+                        Math.cos(lat2);
+        double rad = 6371;
+        double c = 2 * Math.asin(Math.sqrt(a));
+
+        return rad * c; // Distance between the two
+    }
+
+    /**
+     * Calculates the time using speed and distance.
+     *
+     * @param distance
+     * @return time
+     */
+    static double time(double distance) { // double speed may be changed
+        final double GOTRAINSPEED = 38.88;
+
+        return distance / GOTRAINSPEED;
+    }
+}

src/app/Main.java

@@ -1,5 +1,6 @@
 package app;
 
+import data_access.API.GOStationCoordinatesApiClass;
 import data_access.API.GOVehicleApiClass;
 import data_access.text_file.FileStationDataAccessObject;
 import data_access.API.GOStationApiClass;
@@ -56,7 +57,7 @@ public static void main(String[] args) {
         FileStationDataAccessObject stationDataAccessObject;
         try {
             stationDataAccessObject = new FileStationDataAccessObject("./revisedStopData.txt", new StationFactory(),
-                    new TrainFactory(), new GOStationApiClass(), new GOVehicleApiClass());
+                    new TrainFactory(), new GOStationApiClass(), new GOVehicleApiClass(), new GOStationCoordinatesApiClass());
         } catch (IOException e) {
             throw new RuntimeException(e);
         }

src/data_access/API/GOStationCoordinatesApiClass.java

@@ -0,0 +1,55 @@
+package data_access.API;
+
+import okhttp3.HttpUrl;
+import okhttp3.OkHttpClient;
+import okhttp3.Request;
+import okhttp3.Response;
+import org.json.JSONArray;
+import org.json.JSONException;
+import org.json.JSONObject;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+public class GOStationCoordinatesApiClass implements TrainApiInterface {
+    private final String PARTIAL_API_URL = "OpenDataAPI/api/V1";
+    public GOStationCoordinatesApiClass () {
+    }
+    public List<String> retrieveStationCoordinates(String stationId){
+        OkHttpClient client = new OkHttpClient().newBuilder()
+                .build();
+        HttpUrl httpUrl = new HttpUrl.Builder()
+                .scheme("http")
+                .host("api.openmetrolinx.com")
+                .addPathSegment(PARTIAL_API_URL)
+                .addPathSegment("Stop")
+                .addPathSegment("Details")
+                .addPathSegment(stationId) //getting station information for the station with the id denoted by stationId
+                .addQueryParameter("key", API_KEY)
+                .build();
+
+        Request request = new Request.Builder()
+                .url(httpUrl)
+                .addHeader("content-type", "application/json")
+                .build();
+        try {
+            Response response = client.newCall(request).execute();
+            String trainInfoJsonData = response.body().string();
+            JSONObject metaDataJsonObj = new JSONObject(trainInfoJsonData); // This is where the MetaData is located at
+
+            JSONObject stopJsonObj = metaDataJsonObj.getJSONObject("Stop");
+            List<String> coordinatesList = new ArrayList<>();
+            JSONObject longitude = stopJsonObj.getJSONObject("Longitude");
+            JSONObject latitude = stopJsonObj.getJSONObject("Latitude");
+            coordinatesList.add(longitude.getString("Longitude"));
+            coordinatesList.add(latitude.getString("Latitude"));
+
+            return coordinatesList;
+
+        } catch (IOException | JSONException e) {
+            throw new RuntimeException(e);
+        }
+
+    }
+}

src/data_access/text_file/FileStationDataAccessObject.java

@@ -1,6 +1,7 @@
 package data_access.text_file;
 
 import data_access.API.GOStationApiClass;
+import data_access.API.GOStationCoordinatesApiClass;
 import data_access.API.GOVehicleApiClass;
 import entity.*;
 import use_case.StationInfo.StationInfoDataAccessInterface;
@@ -21,14 +22,16 @@ public class FileStationDataAccessObject implements SearchDataAccessInterface, S
 
     private final GOStationApiClass goStationApiClass;
     private final GOVehicleApiClass goVehicleApiClass;
+    private final GOStationCoordinatesApiClass goStationCoordinatesApiClass;
 
     public FileStationDataAccessObject(String txtFilePath, StationFactory stationFactory, TrainFactory trainFactory,
-                                       GOStationApiClass goStationApiClass, GOVehicleApiClass goVehicleApiClass) throws IOException {
+                                       GOStationApiClass goStationApiClass, GOVehicleApiClass goVehicleApiClass, GOStationCoordinatesApiClass goStationCoordinatesApiClass) throws IOException {
 
         this.stationFactory = stationFactory;
         this.trainFactory = trainFactory;
         this.goStationApiClass = goStationApiClass;
         this.goVehicleApiClass = goVehicleApiClass;
+        this.goStationCoordinatesApiClass = goStationCoordinatesApiClass;
         stationTxtFile = new File(txtFilePath);
 
         // Reading the provided txt file that has a path specified by attribute txtFilePath

src/view/ShowIncomingVehiclesView.java

@@ -18,6 +18,8 @@ public class ShowIncomingVehiclesView extends JPanel implements ActionListener,
     private final ShowIncomingVehiclesViewModel showIncomingVehiclesViewModel;
     JLabel stationName;
     JLabel stationIncomingVehicles;
+    JLabel stationEstimatedTimeOfArrival;
+    JLabel stationTimeOfArrival;
 
     public ShowIncomingVehiclesView(ShowIncomingVehiclesViewModel showIncomingVehiclesViewModel) {
         this.showIncomingVehiclesViewModel = showIncomingVehiclesViewModel;
@@ -32,12 +34,22 @@ public ShowIncomingVehiclesView(ShowIncomingVehiclesViewModel showIncomingVehicl
         JLabel stationIncomingVehiclesLabel = new JLabel("Incoming Vehicles: ");
         stationIncomingVehicles = new JLabel();
 
+        JLabel stationEstimatedTimeOfArrivalLabel = new JLabel("Estimated Time of Arrival: ");
+        stationEstimatedTimeOfArrival = new JLabel();
+
+        JLabel stationTimeOfArrivalLabel = new JLabel("Time of Arrival: ");
+        stationTimeOfArrival = new JLabel();
+
         this.setLayout(new BoxLayout(this, BoxLayout.Y_AXIS));
         this.add(title);
         this.add(stationNameLabel);
         this.add(stationName);
         this.add(stationIncomingVehiclesLabel);
         this.add(stationIncomingVehicles);
+        this.add(stationEstimatedTimeOfArrivalLabel);
+        this.add(stationEstimatedTimeOfArrival);
+        this.add(stationTimeOfArrivalLabel);
+        this.add(stationTimeOfArrival);
     }
 
     @Override