EasyDelivery/src/main/java/com/deliveryproject/easydelivery/MainController.java

package com.deliveryproject.easydelivery;

import com.deliveryproject.easydelivery.OSMRClass.Intersection;
import com.deliveryproject.easydelivery.OSMRClass.Root;
import com.deliveryproject.easydelivery.OSMRClass.Step;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.security.access.prepost.PreAuthorize;
import org.springframework.web.bind.annotation.*;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.ArrayList;

@CrossOrigin
@RestController
public class MainController {
    @PreAuthorize("hasRole('User')")
    @GetMapping("/route/nodes")
    @ResponseBody
    public ArrayList<ArrayList<Double>> getNodesBetweenTwoCoordinates(@RequestParam double lon1, @RequestParam double lat1, @RequestParam double lon2, @RequestParam double lat2) throws IOException {
        System.out.println(lon1);
        String url = "http://router.project-osrm.org/route/v1/driving/" + lon1 + "," + lat1 + ";" + lon2 + "," + lat2 + "?steps=true&geometries=geojson";
        System.out.println(url);
        URL osrmEndpoint = new URL(url);
        HttpURLConnection connection = (HttpURLConnection) osrmEndpoint.openConnection();
        connection.setRequestMethod("GET");
        connection.setRequestProperty("Content-Type", "application/json");

        BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
        String inputLine;
        StringBuilder response = new StringBuilder();
        while ((inputLine = in.readLine()) != null) {
            response.append(inputLine);
        }
        in.close();

        ObjectMapper om = new ObjectMapper();
        Root root = om.readValue(response.toString(), Root.class);

        ArrayList<Step> steps = root.routes.get(0).legs.get(0).steps;

        ArrayList<ArrayList<Double>> coordinates = new ArrayList<>();

        for (Step step : steps) {
            ArrayList<Intersection> intersections = step.intersections;
            for (Intersection intersection : intersections) {
                ArrayList<Double> location = new ArrayList<>();
                location.add(intersection.location.get(1));
                location.add(intersection.location.get(0));
                coordinates.add(location);
            }

        }
        System.out.println(coordinates);
        return coordinates;
    }


}