Initial commit

src/main/java/io/github/js0ny/ilp_coursework/IlpCourseworkApplication.java

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+package io.github.js0ny.ilp_coursework;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class IlpCourseworkApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(IlpCourseworkApplication.class, args);
+	}
+
+}

src/main/java/io/github/js0ny/ilp_coursework/controller/ApiController.java

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+package io.github.js0ny.ilp_coursework.controller;
+
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import io.github.js0ny.ilp_coursework.dto.DistanceRequestDto;
+import io.github.js0ny.ilp_coursework.dto.LngLatDto;
+import io.github.js0ny.ilp_coursework.dto.MovementRequestDto;
+import io.github.js0ny.ilp_coursework.dto.RegionCheckRequestDto;
+import io.github.js0ny.ilp_coursework.service.GpsCalculationService;
+
+@RestController
+@RequestMapping("/api/v1")
+public class ApiController {
+
+    private final String myUid = "s2522255";
+    private final GpsCalculationService gpsService;
+
+    public ApiController(GpsCalculationService gpsService) {
+        this.gpsService = gpsService;
+    }
+
+    @GetMapping("/uid")
+    public String getUid() {
+        return myUid;
+    }
+
+    @PostMapping("/distanceTo")
+    public double getDistance(@RequestBody DistanceRequestDto request) {
+
+        LngLatDto position1 = request.position1();
+        LngLatDto position2 = request.position2();
+        return gpsService.calculateDistance(position1, position2);
+    }
+
+    @PostMapping("/isCloseTo")
+    public boolean getIsCloseTo(@RequestBody DistanceRequestDto request) {
+        LngLatDto position1 = request.position1();
+        LngLatDto position2 = request.position2();
+        return gpsService.isCloseTo(position1, position2);
+    }
+
+    @PostMapping("/nextPosition")
+    public LngLatDto getNextPosition(@RequestBody MovementRequestDto request) {
+        LngLatDto start = request.start();
+        double angle = request.angle();
+        return gpsService.nextPosition(start, angle);
+    }
+
+    @PostMapping("/isInRegion")
+    public boolean getIsInRegion(@RequestBody RegionCheckRequestDto request) {
+        return true;
+    }
+}

src/main/java/io/github/js0ny/ilp_coursework/dto/DistanceRequestDto.java

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+package io.github.js0ny.ilp_coursework.dto;
+
+public record DistanceRequestDto(LngLatDto position1, LngLatDto position2) {
+}

src/main/java/io/github/js0ny/ilp_coursework/dto/LngLatDto.java

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+package io.github.js0ny.ilp_coursework.dto;
+
+public record LngLatDto(double lng, double lat) {
+
+}

src/main/java/io/github/js0ny/ilp_coursework/dto/MovementRequestDto.java

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+package io.github.js0ny.ilp_coursework.dto;
+
+/**
+ * Represents the data transfer object for a movement action request.
+ * Used for endpoint: `/api/v1/nextPosition`
+ */
+public record MovementRequestDto(LngLatDto start, double angle) {
+}

src/main/java/io/github/js0ny/ilp_coursework/dto/RegionCheckRequestDto.java

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+package io.github.js0ny.ilp_coursework.dto;
+
+public record RegionCheckRequestDto(LngLatDto position) {
+
+}

src/main/java/io/github/js0ny/ilp_coursework/dto/RegionDto.java

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+package io.github.js0ny.ilp_coursework.dto;
+
+import java.util.List;
+import java.util.Objects;
+
+public record RegionDto(String name, List<LngLatDto> vertices) {
+
+    public boolean isClose() {
+        // Magic number 4: For a polygon, 3 edges is required.
+        // In this dto, edges + 1 vertices is required.
+        if (vertices == null || vertices.size() < 4) {
+            return false;
+        }
+        LngLatDto first = vertices.get(0);
+        LngLatDto last = vertices.get(vertices.size() - 1);
+        return Objects.equals(last, first);
+    }
+
+}

src/main/java/io/github/js0ny/ilp_coursework/exception/GlobalExceptionHandler.java

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+package io.github.js0ny.ilp_coursework.exception;
+
+public class GlobalExceptionHandler {
+
+}

src/main/java/io/github/js0ny/ilp_coursework/service/GpsCalculationService.java

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+package io.github.js0ny.ilp_coursework.service;
+
+import org.springframework.stereotype.Service;
+
+import io.github.js0ny.ilp_coursework.dto.LngLatDto;
+
+@Service
+public class GpsCalculationService {
+    private static final double STEP = 0.00015;
+    private static final double CLOSE_THRESHOLD = STEP;
+
+    public double calculateDistance(LngLatDto position1, LngLatDto position2) {
+        double lngDistance = position2.lng() - position1.lng();
+        double latDistance = position2.lat() - position1.lat();
+        return Math.sqrt(lngDistance * lngDistance + latDistance * latDistance);
+    }
+
+    public boolean isCloseTo(LngLatDto position1, LngLatDto position2) {
+        double distance = calculateDistance(position1, position2);
+        return distance < CLOSE_THRESHOLD;
+    }
+
+    public LngLatDto nextPosition(LngLatDto start, double angle) {
+        double rad = Math.toRadians(angle);
+        double newLng = Math.cos(rad) * STEP + start.lng();
+        double newLat = Math.sin(rad) * STEP + start.lat();
+        return new LngLatDto(newLng, newLat);
+    }
+
+}

src/main/resources/application.properties

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+spring.application.name=ilp-coursework

src/test/java/io/github/js0ny/ilp_coursework/IlpCourseworkApplicationTests.java

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+package io.github.js0ny.ilp_coursework;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+class IlpCourseworkApplicationTests {
+
+	@Test
+	void contextLoads() {
+	}
+
+}