[team-21] 데이먼 첫 번째 PR 드립니다.

BE/src/main/java/team21/airbnb/controller/HomeController.java

@@ -0,0 +1,21 @@
+package team21.airbnb.controller;
+
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+import team21.airbnb.dto.response.RoomChargeDistributionResponse;
+import team21.airbnb.service.RoomService;
+
+@RestController
+public class HomeController {
+
+    private final RoomService roomService;
+
+    public HomeController(RoomService roomService) {
+        this.roomService = roomService;
+    }
+
+    @GetMapping("/room_charge_distribution")
+    public RoomChargeDistributionResponse getRoomChargeDistribution() {
+        return roomService.getRoomChargeDistribution();
+    }
+}

BE/src/main/java/team21/airbnb/domain/Amenity.java

@@ -3,6 +3,7 @@
 import javax.persistence.Column;
 import javax.persistence.Entity;
 import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
 import javax.persistence.Id;
 import lombok.AccessLevel;
 import lombok.Getter;
@@ -14,7 +15,7 @@
 public class Amenity {
 
     @Id
-    @GeneratedValue
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
     @Column(name = "amenity_id")
     private Long id;
 

BE/src/main/java/team21/airbnb/domain/Booking.java

@@ -7,6 +7,7 @@
 import javax.persistence.Enumerated;
 import javax.persistence.FetchType;
 import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
 import javax.persistence.Id;
 import javax.persistence.JoinColumn;
 import javax.persistence.ManyToOne;
@@ -20,7 +21,7 @@
 public class Booking {
 
     @Id
-    @GeneratedValue
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
     @Column(name = "booking_id")
     private Long id;
 

BE/src/main/java/team21/airbnb/domain/Image.java

@@ -4,6 +4,7 @@
 import javax.persistence.Entity;
 import javax.persistence.FetchType;
 import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
 import javax.persistence.Id;
 import javax.persistence.JoinColumn;
 import javax.persistence.ManyToOne;
@@ -17,7 +18,7 @@
 public class Image {
 
     @Id
-    @GeneratedValue
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
     @Column(name = "image_id")
     private Long id;
 

BE/src/main/java/team21/airbnb/domain/Room.java

@@ -7,10 +7,12 @@
 import javax.persistence.Enumerated;
 import javax.persistence.FetchType;
 import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
 import javax.persistence.Id;
 import javax.persistence.JoinColumn;
 import javax.persistence.ManyToOne;
 import lombok.AccessLevel;
+import lombok.Builder;
 import lombok.Getter;
 import lombok.NoArgsConstructor;
 
@@ -20,7 +22,7 @@
 public class Room {
 
     @Id
-    @GeneratedValue
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
     @Column(name = "room_id")
     private Long id;
 
@@ -35,17 +37,17 @@ public class Room {
 
     private String name;
 
-    private int maxNumOfGuests;
+    private Integer maxNumOfGuests;
 
-    private int numOfBedrooms;
+    private Integer numOfBedrooms;
 
-    private int numOfBaths;
+    private Integer numOfBaths;
 
-    private int cleaningFee;
+    private Integer cleaningFee;
 
-    private int roomCharge;
+    private Integer roomCharge;
 
-    private int weeklyDiscountPercent;
+    private Integer weeklyDiscountPercent;
 
     @Embedded
     private Location location;
@@ -54,4 +56,22 @@ public class Room {
     @JoinColumn(name = "host_id")
     private User host;
 
+    @Builder
+    public Room(RoomType roomType, SpaceType spaceType, String description, String name,
+            Integer maxNumOfGuests, Integer numOfBedrooms, Integer numOfBaths,
+            Integer cleaningFee, Integer roomCharge, Integer weeklyDiscountPercent,
+            Location location, User host) {
+        this.roomType = roomType;
+        this.spaceType = spaceType;
+        this.description = description;
+        this.name = name;
+        this.maxNumOfGuests = maxNumOfGuests;
+        this.numOfBedrooms = numOfBedrooms;
+        this.numOfBaths = numOfBaths;
+        this.cleaningFee = cleaningFee;
+        this.roomCharge = roomCharge;
+        this.weeklyDiscountPercent = weeklyDiscountPercent;
+        this.location = location;
+        this.host = host;
+    }
 }

BE/src/main/java/team21/airbnb/domain/RoomAmenity.java

@@ -4,6 +4,7 @@
 import javax.persistence.Entity;
 import javax.persistence.FetchType;
 import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
 import javax.persistence.Id;
 import javax.persistence.JoinColumn;
 import javax.persistence.ManyToOne;
@@ -17,7 +18,7 @@
 public class RoomAmenity {
 
     @Id
-    @GeneratedValue
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
     @Column(name = "room_amenity_id")
     private Long id;
 

BE/src/main/java/team21/airbnb/domain/User.java

@@ -3,6 +3,7 @@
 import javax.persistence.Column;
 import javax.persistence.Entity;
 import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
 import javax.persistence.Id;
 import javax.persistence.Table;
 import lombok.AccessLevel;
@@ -16,7 +17,7 @@
 public class User {
 
     @Id
-    @GeneratedValue
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
     @Column(name = "user_id")
     private Long id;
 

BE/src/main/java/team21/airbnb/domain/Wish.java

@@ -4,6 +4,7 @@
 import javax.persistence.Entity;
 import javax.persistence.FetchType;
 import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
 import javax.persistence.Id;
 import javax.persistence.JoinColumn;
 import javax.persistence.ManyToOne;
@@ -17,7 +18,7 @@
 public class Wish {
 
     @Id
-    @GeneratedValue
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
     @Column(name = "wish_id")
     private Long id;
 

BE/src/main/java/team21/airbnb/dto/response/RoomChargeDistributionResponse.java

@@ -0,0 +1,23 @@
+package team21.airbnb.dto.response;
+
+import java.util.Map;
+import lombok.AccessLevel;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Getter
+@NoArgsConstructor(access = AccessLevel.PRIVATE)
+public class RoomChargeDistributionResponse {
+
+    private Integer minRoomCharge;
+    private Integer maxRoomCharge;
+    private Map<Integer, Integer> graph;
+
+    public RoomChargeDistributionResponse(Integer minRoomCharge, Integer maxRoomCharge,
+            Map<Integer, Integer> graph) {
+        this.minRoomCharge = minRoomCharge;
+        this.maxRoomCharge = maxRoomCharge;
+        this.graph = graph;
+    }
+
+}

BE/src/main/java/team21/airbnb/repository/RoomRepository.java

@@ -0,0 +1,27 @@
+package team21.airbnb.repository;
+
+import java.util.List;
+import javax.persistence.EntityManager;
+import org.springframework.stereotype.Repository;
+import team21.airbnb.domain.Room;
+
+@Repository
+public class RoomRepository {
+
+    private final EntityManager em;
+
+    public RoomRepository(EntityManager em) {
+        this.em = em;
+    }
+
+    public List<Room> findAll() {
+        return em.createQuery("select r from Room r", Room.class)
+                .getResultList();
+    }
+
+    public Long save(Room room) {
+        em.persist(room);
+        return room.getId();
+    }
+
+}

BE/src/main/java/team21/airbnb/service/RoomService.java

@@ -0,0 +1,47 @@
+package team21.airbnb.service;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+import team21.airbnb.domain.Room;
+import team21.airbnb.dto.response.RoomChargeDistributionResponse;
+import team21.airbnb.repository.RoomRepository;
+
+@Service
+@Transactional(readOnly = true)
+public class RoomService {
+
+    public static final double DIGIT = 10.0;
+
+    private final RoomRepository roomRepository;
+
+    public RoomService(RoomRepository roomRepository) {
+        this.roomRepository = roomRepository;
+    }
+
+    public RoomChargeDistributionResponse getRoomChargeDistribution() {
+        List<Room> rooms = roomRepository.findAll();
+        Map<Integer, Integer> graph = new HashMap<>();
+        int maxRoomCharge = Integer.MIN_VALUE;
+        int minRoomCharge = Integer.MAX_VALUE;
+
+        for (Room room : rooms) {
+            int roomCharge = room.getRoomCharge();
+            maxRoomCharge = Math.max(maxRoomCharge, roomCharge);
+            minRoomCharge = Math.min(minRoomCharge, roomCharge);
+
+            graph.merge((int) (Math.ceil(roomCharge / DIGIT) * DIGIT), 1, Integer::sum);
+        }
+
+        return new RoomChargeDistributionResponse(minRoomCharge, maxRoomCharge, graph);
+    }
+
+    @Transactional
+    public Long save(Room room) {
+        // TODO : parameter DTO 로 받기, Host 추가
+        return roomRepository.save(room);
+    }
+
+}

BE/src/main/resources/application.yml

@@ -1,6 +1,6 @@
 spring:
   datasource:
-    url: jdbc:h2:tcp://localhost/~/study/codesquad/team_project/airbnb
+    url: jdbc:h2:tcp://localhost/~/study/codesquad/team_project/airbnb;MODE=MYSQL
 
     username: sa
     password:
@@ -12,6 +12,7 @@ spring:
     properties:
       hibernate:
         format_sql: true
+        dialect: org.hibernate.dialect.MySQL5InnoDBDialect
 
 logging.level:
   org.hibernate.SQL: debug

BE/src/test/java/team21/airbnb/controller/HomeControllerTest.java

@@ -0,0 +1,60 @@
+package team21.airbnb.controller;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.context.SpringBootTest.WebEnvironment;
+import org.springframework.boot.test.web.client.TestRestTemplate;
+import org.springframework.boot.test.web.server.LocalServerPort;
+import team21.airbnb.domain.Room;
+import team21.airbnb.dto.response.RoomChargeDistributionResponse;
+import team21.airbnb.repository.RoomRepository;
+import team21.airbnb.service.RoomService;
+
+@SpringBootTest(webEnvironment = WebEnvironment.RANDOM_PORT)
+class HomeControllerTest {
+
+    @LocalServerPort int port;
+
+    @Autowired TestRestTemplate restTemplate;
+
+    public static final int MIN_ROOM_CHARGE = 10005;
+    public static final int MAX_ROOM_CHARGE = MIN_ROOM_CHARGE + 1000;
+
+
+    @Autowired RoomRepository roomRepository;
+    @Autowired RoomService roomService;
+    @Autowired HomeController homeController;
+
+    @Test
+    @DisplayName("가격 분포 요청 시 응답한다")
+    public void getChargeDistribution() {
+        // given
+        Room room1 = Room.builder().name("room1").roomCharge(MIN_ROOM_CHARGE).build();
+        Room room2 = Room.builder().name("room2").roomCharge(ceil(MIN_ROOM_CHARGE)).build();
+        Room room3 = Room.builder().name("room3").roomCharge(MAX_ROOM_CHARGE).build();
+
+        roomService.save(room1);
+        roomService.save(room2);
+        roomService.save(room3);
+
+        String url = "http://localhost:" + port + "/room_charge_distribution";
+
+        // when
+        RoomChargeDistributionResponse roomChargeDistribution
+                = restTemplate.getForObject(url, RoomChargeDistributionResponse.class);
+
+        // then
+        assertThat(roomChargeDistribution.getMinRoomCharge()).isEqualTo(MIN_ROOM_CHARGE);
+        assertThat(roomChargeDistribution.getMaxRoomCharge()).isEqualTo(MAX_ROOM_CHARGE);
+        assertThat(roomChargeDistribution.getGraph().get(ceil(MIN_ROOM_CHARGE))).isEqualTo(2);
+        assertThat(roomChargeDistribution.getGraph().get(ceil(MAX_ROOM_CHARGE))).isEqualTo(1);
+    }
+
+    private int ceil(int num) {
+        return (int) (Math.ceil(num / RoomService.DIGIT) * RoomService.DIGIT);
+    }
+}