[Feat] 예약 현황 조회 / 예약 하기 기능 구현

nowait-api/build.gradle

@@ -16,6 +16,10 @@ dependencies {
     implementation 'org.springframework.boot:spring-boot-starter'
     implementation 'org.springframework.boot:spring-boot-starter-web'
     implementation 'org.springframework.boot:spring-boot-starter-validation'
+    implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
+
+    // H2
+    runtimeOnly 'com.h2database:h2'
 
     // Test
     testImplementation 'org.springframework.boot:spring-boot-starter-test'

nowait-api/src/main/java/com/nowait/booking/api/BookingApi.java

@@ -1,5 +1,6 @@
 package com.nowait.booking.api;
 
+import com.nowait.booking.application.BookingService;
 import com.nowait.booking.dto.TimeSlotDto;
 import com.nowait.booking.dto.request.BookingReq;
 import com.nowait.booking.dto.response.BookingRes;
@@ -28,6 +29,8 @@
 @RequiredArgsConstructor
 public class BookingApi {
 
+    private final BookingService bookingService;
+
     /**
      * 가게 예약 현황 조회 API
      *

nowait-api/src/main/java/com/nowait/booking/application/BookingEventPublisher.java

@@ -0,0 +1,21 @@
+package com.nowait.booking.application;
+
+import com.nowait.booking.domain.model.Booking;
+import com.nowait.common.event.BookedEvent;
+import lombok.RequiredArgsConstructor;
+import org.springframework.context.ApplicationEventPublisher;
+import org.springframework.scheduling.annotation.Async;
+import org.springframework.stereotype.Component;
+
+@Component
+@RequiredArgsConstructor
+public class BookingEventPublisher {
+
+    private final ApplicationEventPublisher eventPublisher;
+
+    @Async
+    public void publishBookedEvent(Booking booking, Long placeId) {
+        eventPublisher.publishEvent(
+            new BookedEvent(booking.getId(), placeId, booking.getUserId()));
+    }
+}

nowait-api/src/main/java/com/nowait/booking/application/BookingService.java

@@ -0,0 +1,80 @@
+package com.nowait.booking.application;
+
+import com.nowait.booking.domain.model.Booking;
+import com.nowait.booking.domain.model.BookingSlot;
+import com.nowait.booking.domain.repository.BookingRepository;
+import com.nowait.booking.domain.repository.BookingSlotRepository;
+import com.nowait.booking.dto.TimeSlotDto;
+import com.nowait.booking.dto.response.BookingRes;
+import com.nowait.booking.dto.response.DailyBookingStatusRes;
+import com.nowait.place.domain.repository.PlaceRepository;
+import com.nowait.user.domain.repository.UserRepository;
+import jakarta.persistence.EntityNotFoundException;
+import java.time.LocalDate;
+import java.time.LocalTime;
+import java.util.List;
+import java.util.stream.Collectors;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+@Service
+@RequiredArgsConstructor
+@Transactional(readOnly = true)
+public class BookingService {
+
+    private final BookingSlotRepository bookingSlotRepository;
+    private final BookingRepository bookingRepository;
+    private final UserRepository userRepository;
+    private final PlaceRepository placeRepository;
+    private final BookingEventPublisher bookingEventPublisher;
+
+    public DailyBookingStatusRes getDailyBookingStatus(Long placeId, LocalDate date) {
+        List<BookingSlot> bookingSlots = bookingSlotRepository.findAllByPlaceIdAndDate(
+            placeId, date);
+
+        List<TimeSlotDto> timeSlots = bookingSlots.stream()
+            .collect(Collectors.groupingBy(BookingSlot::getTime))
+            .entrySet().stream()
+            .map(entry -> new TimeSlotDto(entry.getKey(), isAvailable(entry.getValue())))
+            .toList();
+
+        return new DailyBookingStatusRes(placeId, date, timeSlots);
+    }
+
+    @Transactional
+    public BookingRes book(Long loginId, Long placeId, LocalDate date, LocalTime time,
+        Integer partySize) {
+        validateUserExist(loginId, "존재하지 않는 사용자의 요청입니다.");
+        validatePlaceExist(placeId, "존재하지 않는 식당입니다.");
+
+        BookingSlot slot = findAvailableSlot(placeId, date, time);
+        Booking booking = bookingRepository.save(Booking.of(loginId, partySize, slot));
+
+        bookingEventPublisher.publishBookedEvent(booking, placeId);
+
+        return BookingRes.of(booking, slot);
+    }
+
+    private boolean isAvailable(List<BookingSlot> slots) {
+        // 모든 슬롯이 예약된 경우에만 false 반환
+        return slots.stream().anyMatch(slot -> !slot.isBooked());
+    }
+
+    private void validateUserExist(Long userId, String errorMessage) {
+        if (!userRepository.existsById(userId)) {
+            throw new EntityNotFoundException(errorMessage);
+        }
+    }
+
+    private void validatePlaceExist(Long placeId, String errorMessage) {
+        if (!placeRepository.existsById(placeId)) {
+            throw new EntityNotFoundException(errorMessage);
+        }
+    }
+
+    private BookingSlot findAvailableSlot(Long placeId, LocalDate date, LocalTime time) {
+        return bookingSlotRepository.findFirstByPlaceIdAndDateAndTimeAndIsBookedFalse(placeId, date,
+            time).orElseThrow(() -> new IllegalArgumentException("예약 가능한 테이블이 없습니다."));
+    }
+}

nowait-api/src/main/java/com/nowait/booking/domain/model/Booking.java

@@ -0,0 +1,51 @@
+package com.nowait.booking.domain.model;
+
+import com.nowait.common.domain.model.BaseTimeEntity;
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.EnumType;
+import jakarta.persistence.Enumerated;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import jakarta.persistence.Table;
+import lombok.AccessLevel;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Entity
+@Table(name = "booking")
+@Getter
+@AllArgsConstructor(access = AccessLevel.PRIVATE)
+@NoArgsConstructor(access = AccessLevel.PROTECTED)
+public class Booking extends BaseTimeEntity {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    @Column(name = "id")
+    private Long id;
+
+    @Column(name = "booking_slot_id", nullable = false, unique = true)
+    private Long bookingSlotId;
+
+    @Column(name = "user_id", nullable = false)
+    private Long userId;
+
+    @Enumerated(value = EnumType.STRING)
+    @Column(name = "status", nullable = false, columnDefinition = "varchar(20)")
+    private BookingStatus status;
+
+    @Column(name = "party_size")
+    private Integer partySize;
+
+    public static Booking of(Long userId, Integer partySize, BookingSlot slot) {
+        return new Booking(
+            null,
+            slot.getId(),
+            userId,
+            slot.book(),
+            partySize
+        );
+    }
+}

nowait-api/src/main/java/com/nowait/booking/domain/model/BookingSlot.java

@@ -0,0 +1,63 @@
+package com.nowait.booking.domain.model;
+
+import com.nowait.common.domain.model.BaseTimeEntity;
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import jakarta.persistence.Table;
+import java.time.LocalDate;
+import java.time.LocalTime;
+import lombok.AccessLevel;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Entity
+@Table(name = "booking_slot")
+@Getter
+@AllArgsConstructor(access = AccessLevel.PRIVATE)
+@NoArgsConstructor(access = AccessLevel.PROTECTED)
+public class BookingSlot extends BaseTimeEntity {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    @Column(name = "id")
+    private Long id;
+
+    @Column(name = "place_id", nullable = false)
+    private Long placeId;
+
+    @Column(name = "table_id", nullable = false)
+    private Long tableId;
+
+    @Column(name = "date", nullable = false)
+    private LocalDate date;
+
+    @Column(name = "time", nullable = false)
+    private LocalTime time;
+
+    @Column(name = "is_booked")
+    private boolean isBooked;
+
+    @Column(name = "deposit_required")
+    private boolean depositRequired;
+
+    @Column(name = "confirm_required")
+    private boolean confirmRequired;
+
+    @Column(name = "deposit_policy_id")
+    private Long deposit_policy_id;
+
+    public BookingStatus book() {
+        if (isBooked) {
+            throw new IllegalArgumentException("이미 예약된 테이블입니다.");
+        }
+
+        isBooked = true;
+
+        return isDepositRequired() ? BookingStatus.PENDING_PAYMENT
+            : isConfirmRequired() ? BookingStatus.PENDING_CONFIRM : BookingStatus.CONFIRMED;
+    }
+}

nowait-api/src/main/java/com/nowait/booking/domain/model/BookingStatus.java

@@ -0,0 +1,15 @@
+package com.nowait.booking.domain.model;
+
+import lombok.Getter;
+import lombok.RequiredArgsConstructor;
+
+@Getter
+@RequiredArgsConstructor
+public enum BookingStatus {
+    CONFIRMED("확정됨"),
+    PENDING_CONFIRM("확정 대기 중"),
+    PENDING_PAYMENT("결재 대기 중"),
+    CANCELLED("취소됨");
+
+    private final String description;
+}

nowait-api/src/main/java/com/nowait/booking/domain/repository/BookingRepository.java

@@ -0,0 +1,8 @@
+package com.nowait.booking.domain.repository;
+
+import com.nowait.booking.domain.model.Booking;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface BookingRepository extends JpaRepository<Booking, Long> {
+
+}

nowait-api/src/main/java/com/nowait/booking/domain/repository/BookingSlotRepository.java

@@ -0,0 +1,16 @@
+package com.nowait.booking.domain.repository;
+
+import com.nowait.booking.domain.model.BookingSlot;
+import java.time.LocalDate;
+import java.time.LocalTime;
+import java.util.List;
+import java.util.Optional;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface BookingSlotRepository extends JpaRepository<BookingSlot, Long> {
+
+    List<BookingSlot> findAllByPlaceIdAndDate(Long placeId, LocalDate date);
+
+    Optional<BookingSlot> findFirstByPlaceIdAndDateAndTimeAndIsBookedFalse(Long placeId,
+        LocalDate date, LocalTime time);
+}

nowait-api/src/main/java/com/nowait/booking/dto/response/BookingRes.java

@@ -1,10 +1,21 @@
 package com.nowait.booking.dto.response;
 
+import com.nowait.booking.domain.model.Booking;
+import com.nowait.booking.domain.model.BookingSlot;
+
 public record BookingRes(
     Long bookingId,
     String bookingStatus,
     boolean depositRequired,
     boolean confirmRequired
 ) {
 
+    public static BookingRes of(Booking booking, BookingSlot slot) {
+        return new BookingRes(
+            booking.getId(),
+            booking.getStatus().getDescription(),
+            slot.isDepositRequired(),
+            slot.isConfirmRequired()
+        );
+    }
 }

nowait-api/src/main/java/com/nowait/common/config/JpaConfig.java

@@ -0,0 +1,10 @@
+package com.nowait.common.config;
+
+import org.springframework.context.annotation.Configuration;
+import org.springframework.data.jpa.repository.config.EnableJpaAuditing;
+
+@Configuration
+@EnableJpaAuditing
+public class JpaConfig {
+
+}

nowait-api/src/main/java/com/nowait/common/domain/model/BaseTimeEntity.java

@@ -0,0 +1,22 @@
+package com.nowait.common.domain.model;
+
+import jakarta.persistence.Column;
+import jakarta.persistence.EntityListeners;
+import jakarta.persistence.MappedSuperclass;
+import java.time.LocalDateTime;
+import org.springframework.data.annotation.CreatedDate;
+import org.springframework.data.annotation.LastModifiedDate;
+import org.springframework.data.jpa.domain.support.AuditingEntityListener;
+
+@MappedSuperclass
+@EntityListeners(AuditingEntityListener.class)
+public class BaseTimeEntity {
+
+    @CreatedDate
+    @Column(name = "created_at", nullable = false, updatable = false)
+    private LocalDateTime createdAt;
+
+    @LastModifiedDate
+    @Column(name = "updated_at", nullable = false)
+    private LocalDateTime updatedAt;
+}

nowait-api/src/main/java/com/nowait/common/event/BookedEvent.java

@@ -0,0 +1,9 @@
+package com.nowait.common.event;
+
+public record BookedEvent(
+    Long bookingId,
+    Long placeId,
+    Long userId
+) {
+
+}