[Spring MVC] 이상현 미션 제출합니다.

build.gradle

@@ -14,6 +14,12 @@ repositories {
 
 dependencies {
     implementation 'org.springframework.boot:spring-boot-starter'
+    implementation 'org.springframework.boot:spring-boot-starter-web'
+    implementation 'org.springframework.boot:spring-boot-starter-thymeleaf'
+
+    compileOnly 'org.projectlombok:lombok'
+    annotationProcessor 'org.projectlombok:lombok'
+
     testImplementation 'org.springframework.boot:spring-boot-starter-test'
     testImplementation 'io.rest-assured:rest-assured:5.3.1'
 }

src/main/java/roomescape/home/controller/HomeController.java

@@ -0,0 +1,12 @@
+package roomescape.home.controller;
+
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.GetMapping;
+
+@Controller
+public class HomeController {
+    @GetMapping("/")
+    public String displayHomePage() {
+        return "home";
+    }
+}

src/main/java/roomescape/reservation/controller/ReservationController.java

@@ -0,0 +1,53 @@
+package roomescape.reservation.controller;
+
+import java.net.URI;
+import java.util.List;
+import lombok.RequiredArgsConstructor;
+import org.springframework.http.ResponseEntity;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.DeleteMapping;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.ResponseBody;
+import roomescape.reservation.dto.ReservationRequest;
+import roomescape.reservation.dto.ReservationResponse;
+import roomescape.reservation.service.ReservationService;
+
+@Controller
+@RequiredArgsConstructor
+public class ReservationController {
+    private final ReservationService reservationService;
+
+    @GetMapping("/reservation")
+    public String displayReservationPage() {
+        return "reservation";
+    }
+
+    @GetMapping("/reservations")
+    @ResponseBody
+    public ResponseEntity<List<ReservationResponse>> getReservations() {
+        return ResponseEntity.ok(reservationService.getReservations());
+    }
+
+    @PostMapping("/reservations")
+    @ResponseBody
+    public ResponseEntity<ReservationResponse> addReservation(@RequestBody ReservationRequest request) {
+        ReservationResponse response = reservationService.addReservation(request);
+        URI location = URI.create("/reservations/" + response.id());
+        return ResponseEntity.created(location).body(response);
+    }
+
+    @DeleteMapping("/reservations/{id}")
+    public ResponseEntity<Void> cancelReservation(@PathVariable Long id) {
+        reservationService.deleteReservation(id);
+        return ResponseEntity.noContent().build();
+    }
+
+    @ExceptionHandler(IllegalArgumentException.class)
+    public ResponseEntity<String> handleIllegalArgument(IllegalArgumentException e) {
+        return ResponseEntity.badRequest().body(e.getMessage());
+    }
+}

src/main/java/roomescape/reservation/dto/ReservationRequest.java

@@ -0,0 +1,12 @@
+package roomescape.reservation.dto;
+
+import com.fasterxml.jackson.annotation.JsonFormat;
+import java.time.LocalDate;
+import java.time.LocalTime;
+
+public record ReservationRequest(
+        String name,
+        LocalDate date,
+        @JsonFormat(pattern = "HH:mm")
+        LocalTime time) {
+}

src/main/java/roomescape/reservation/dto/ReservationResponse.java

@@ -0,0 +1,13 @@
+package roomescape.reservation.dto;
+
+import com.fasterxml.jackson.annotation.JsonFormat;
+import java.time.LocalDate;
+import java.time.LocalTime;
+
+public record ReservationResponse(
+        Long id,
+        String name,
+        LocalDate date,
+        @JsonFormat(pattern = "HH:mm")
+        LocalTime time) {
+}

src/main/java/roomescape/reservation/entity/Reservation.java

@@ -0,0 +1,36 @@
+package roomescape.reservation.entity;
+
+import java.time.LocalDate;
+import java.time.LocalTime;
+import lombok.Data;
+
+@Data
+public class Reservation {
+    private Long id;
+    private String name;
+    private LocalDate date;
+    private LocalTime time;
+
+    public Reservation(Long id, String name, LocalDate date, LocalTime time) {
+        validate(name, date, time);
+        this.id = id;
+        this.name = name;
+        this.date = date;
+        this.time = time;
+    }
+
+    private void validate(String name, LocalDate date, LocalTime time) {
+        if (name == null || name.trim().isEmpty()) {
+            throw new IllegalArgumentException("유효한 이름이 아닙니다.");
+        }
+        if (date == null || date.isBefore(LocalDate.now())) {
+            throw new IllegalArgumentException("유효한 날짜 값이 아닙니다.");
+        }
+        if (date.equals(LocalDate.now()) && time.isBefore(LocalTime.now())) {
+            throw new IllegalArgumentException("현재 시간보다 이전 시간으로는 예약할 수 없습니다.");
+        }
+        if (time == null) {
+            throw new IllegalArgumentException("유효한 시간이 아닙니다.");
+        }
+    }
+}

src/main/java/roomescape/reservation/exception/NotFoundReservationException.java

@@ -0,0 +1,7 @@
+package roomescape.reservation.exception;
+
+public class NotFoundReservationException extends IllegalArgumentException {
+    public NotFoundReservationException(String message) {
+        super(message);
+    }
+}

src/main/java/roomescape/reservation/service/ReservationService.java

@@ -0,0 +1,58 @@
+package roomescape.reservation.service;
+
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.atomic.AtomicLong;
+import java.util.stream.Collectors;
+import org.springframework.stereotype.Service;
+import roomescape.reservation.dto.ReservationRequest;
+import roomescape.reservation.dto.ReservationResponse;
+import roomescape.reservation.entity.Reservation;
+import roomescape.reservation.exception.NotFoundReservationException;
+
+@Service
+public class ReservationService {
+    private final Map<Long, Reservation> reservations = new ConcurrentHashMap<>();
+    private final AtomicLong index = new AtomicLong(1);
+
+    public List<ReservationResponse> getReservations() {
+        return reservations.values().stream()
+                .map(this::toResponseDTO)
+                .collect(Collectors.toList());
+    }
+
+    public ReservationResponse addReservation(ReservationRequest request) {
+        if (isDuplicate(request)) {
+            throw new IllegalArgumentException("이미 해당 날짜와 시간에 예약이 존재합니다.");
+        }
+
+        Long id = index.getAndIncrement();
+        Reservation newReservation = new Reservation(id, request.name(), request.date(), request.time());
+        reservations.put(id, newReservation);
+        return toResponseDTO(newReservation);
+    }
+
+    public void deleteReservation(Long id) {
+        Reservation target = reservations.remove(id);
+        if (target == null) {
+            throw new NotFoundReservationException("해당 ID의 예약이 존재하지 않습니다: ");
+        }
+    }
+
+    private ReservationResponse toResponseDTO(Reservation reservation) {
+        return new ReservationResponse(
+                reservation.getId(),
+                reservation.getName(),
+                reservation.getDate(),
+                reservation.getTime()
+        );
+    }
+
+    private boolean isDuplicate(ReservationRequest request) {
+        return reservations.values().stream().anyMatch(reservation ->
+                reservation.getDate().equals(request.date()) &&
+                        reservation.getTime().equals(request.time())
+        );
+    }
+}

src/test/java/roomescape/MissionStepTest.java

@@ -1,6 +1,15 @@
 package roomescape;
 
+import static org.hamcrest.Matchers.is;
+
 import io.restassured.RestAssured;
+import io.restassured.http.ContentType;
+import java.time.LocalDate;
+import java.time.LocalTime;
+import java.time.temporal.ChronoUnit;
+import java.util.HashMap;
+import java.util.Map;
+import org.junit.jupiter.api.DisplayName;
 import org.junit.jupiter.api.Test;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.test.annotation.DirtiesContext;
@@ -16,4 +25,109 @@ public class MissionStepTest {
                 .then().log().all()
                 .statusCode(200);
     }
+
+    @Test
+    void 이단계() {
+        RestAssured.given().log().all()
+                .when().get("/reservation")
+                .then().log().all()
+                .statusCode(200);
+
+        RestAssured.given().log().all()
+                .when().get("/reservations")
+                .then().log().all()
+                .statusCode(200)
+                .body("size()", is(0));
+    }
+
+    @Test
+    void 삼단계() {
+        Map<String, String> params = new HashMap<>();
+        params.put("name", "브라운");
+        params.put("date", "2028-08-05");
+        params.put("time", "15:40");
+
+        RestAssured.given().log().all()
+                .contentType(ContentType.JSON)
+                .body(params)
+                .when().post("/reservations")
+                .then().log().all()
+                .statusCode(201)
+                .header("Location", "/reservations/1")
+                .body("id", is(1));
+
+        RestAssured.given().log().all()
+                .when().get("/reservations")
+                .then().log().all()
+                .statusCode(200)
+                .body("size()", is(1));
+
+        RestAssured.given().log().all()
+                .when().delete("/reservations/1")
+                .then().log().all()
+                .statusCode(204);
+
+        RestAssured.given().log().all()
+                .when().get("/reservations")
+                .then().log().all()
+                .statusCode(200)
+                .body("size()", is(0));
+    }
+
+    @Test
+    void 사단계() {
+        Map<String, String> params = new HashMap<>();
+        params.put("name", "브라운");
+        params.put("date", "");
+        params.put("time", "");
+
+        // 필요한 인자가 없는 경우
+        RestAssured.given().log().all()
+                .contentType(ContentType.JSON)
+                .body(params)
+                .when().post("/reservations")
+                .then().log().all()
+                .statusCode(400);
+
+        // 삭제할 예약이 없는 경우
+        RestAssured.given().log().all()
+                .when().delete("/reservations/1")
+                .then().log().all()
+                .statusCode(400);
+    }
+
+    @Test
+    @DisplayName("지난 날짜 예외처리")
+    void invalidDate() {
+        Map<String, String> params = new HashMap<>();
+        params.put("name", "브라운");
+        params.put("date", "2024-01-01");
+        params.put("time", "15:00");
+
+        RestAssured.given().log().all()
+                .contentType(ContentType.JSON)
+                .body(params)
+                .when().post("/reservations")
+                .then().log().all()
+                .statusCode(400);
+    }
+
+    @Test
+    @DisplayName("오늘 현재 시각보다 빠른 시간 예외처리")
+    void invalidTodayTime() {
+        LocalDate today = LocalDate.now();
+        LocalTime pastTime = LocalTime.now().minusMinutes(1);
+
+        Map<String, String> params = new HashMap<>();
+        params.put("name", "브라운");
+        params.put("date", today.toString());
+        params.put("time", pastTime.truncatedTo(ChronoUnit.MINUTES).toString());
+
+        RestAssured.given().log().all()
+                .contentType(ContentType.JSON)
+                .body(params)
+                .when().post("/reservations")
+                .then().log().all()
+                .statusCode(400);
+    }
 }

src/test/java/roomescape/ReservationServiceTest.java

@@ -0,0 +1,40 @@
+package roomescape;
+
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import roomescape.reservation.dto.ReservationRequest;
+import roomescape.reservation.exception.NotFoundReservationException;
+
+import java.time.LocalDate;
+import java.time.LocalTime;
+import roomescape.reservation.service.ReservationService;
+
+class ReservationServiceTest {
+
+    private ReservationService service;
+
+    @BeforeEach
+    void setUp() {
+        service = new ReservationService();
+    }
+
+    @Test
+    @DisplayName("동일한 날짜, 시간에 예약하면 예외 발생")
+    void throwExceptionWhenDuplicateReservation() {
+        ReservationRequest request = new ReservationRequest("홍길동", LocalDate.now().plusDays(1), LocalTime.of(10, 0));
+        service.addReservation(request);
+
+        ReservationRequest duplicateRequest = new ReservationRequest("김철수", LocalDate.now().plusDays(1), LocalTime.of(10, 0));
+
+        assertThrows(IllegalArgumentException.class, () -> service.addReservation(duplicateRequest));
+    }
+
+    @Test
+    @DisplayName("존재하지 않는 예약 ID로 삭제 시 예외 발생")
+    void deleteNonExistingReservationThrows() {
+        assertThrows(NotFoundReservationException.class, () -> service.deleteReservation(999L));
+    }
+}