[1단계 - 상품 관리 기능] 제나(위예나) 미션 제출합니다

.gitignore

@@ -35,3 +35,6 @@ out/
 
 ### VS Code ###
 .vscode/
+
+
+.db/

README.md

@@ -1 +1,29 @@
 # jwp-shopping-cart
+
+## 1단계 피드백 사항 및 추가 수정 사항
+- [x] view의 객체(ProductRequest) 가 Service 에 그대로 전달되었을 때 생기는 문제점
+- [x] 컨트롤러에서 Service 에서 사용되는 값들을 알게 되면 안 좋은 점
+- [x] View 를 반환하는 컨트롤러와 API 작업을 하는 컨트롤러 분리하기
+- [x] Model이 반환되는 과정
+- [x] ModelAndView 학습
+- [x] 아무것도 반환하지 않을 때 200을 반환한 이유 / 어떤 값을 반환해야 하는지 학습
+- [x] Dao 에 제네릭 적용해보기
+- [x] update, delete 시 해당하는 id 가 없을 때 예외 핸들링
+- [x] Service layer 테스트 추가
+- [x] 테스트 DB 분리
+- [ ] 테스트 픽스처 적용해보기
+- [x] 어플리케이션 초기 실행 시 상품 목록에 더미데이터 추가
+
+
+
+## 1단계 기능 요구 사항
+
+- [x] 상품 목록 페이지 연동
+  - [x] / url로 접근할 경우 index.html을 통해 상품 목록 페이지를 조회 가능하다.
+  - [x] 상품 기본 정보는 상품 ID, 상품 이름, 상품 이미지, 상품 가격이다.
+
+- [x] 관리자 도구 페이지 상품 관리 CRUD API
+  - [x] 생성(/admin/product POST)
+  - [x] 조회(/admin)
+  - [x] 수정(/admin/product/{id} PUT)
+  - [x] 삭제(/admin/product/{id} DELETE)

build.gradle

@@ -14,6 +14,7 @@ dependencies {
     implementation 'org.springframework.boot:spring-boot-starter-web'
     implementation 'org.springframework.boot:spring-boot-starter-jdbc'
     implementation 'org.springframework.boot:spring-boot-starter-thymeleaf'
+    implementation 'org.springframework.boot:spring-boot-starter-validation'
 
     testImplementation 'org.springframework.boot:spring-boot-starter-test'
     testImplementation 'io.rest-assured:rest-assured:4.4.0'

src/main/java/cart/JwpCartApplication.java

@@ -9,5 +9,4 @@ public class JwpCartApplication {
     public static void main(String[] args) {
         SpringApplication.run(JwpCartApplication.class, args);
     }
-
 }

src/main/java/cart/controller/AdminController.java

@@ -0,0 +1,38 @@
+package cart.controller;
+
+import cart.dto.ProductRequest;
+import cart.service.CartService;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+
+import javax.validation.Valid;
+import java.net.URI;
+
+@RestController
+@RequestMapping("/admin")
+public class AdminController {
+
+    private final CartService cartService;
+
+    public AdminController(final CartService cartService) {
+        this.cartService = cartService;
+    }
+
+    @PostMapping("/product")
+    public ResponseEntity<Void> createProduct(@RequestBody @Valid final ProductRequest productRequest) {
+        final long id = cartService.create(productRequest);
+        return ResponseEntity.created(URI.create("/admin/product/" + id)).build();
+    }
+
+    @PutMapping("/product/{id}")
+    public ResponseEntity<Void> updateProduct(@PathVariable Long id, @RequestBody @Valid final ProductRequest productRequest) {
+        cartService.update(id, productRequest);
+        return ResponseEntity.noContent().build();
+    }
+
+    @DeleteMapping("/product/{id}")
+    public ResponseEntity<Void> deleteProduct(@PathVariable Long id) {
+        cartService.delete(id);
+        return ResponseEntity.noContent().build();
+    }
+}

src/main/java/cart/controller/ViewController.java

@@ -0,0 +1,33 @@
+package cart.controller;
+
+import cart.dto.ProductResponse;
+import cart.service.CartService;
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.Model;
+import org.springframework.web.bind.annotation.GetMapping;
+
+import java.util.List;
+
+@Controller
+public class ViewController {
+
+    private final CartService cartService;
+
+    public ViewController(final CartService cartService) {
+        this.cartService = cartService;
+    }
+
+    @GetMapping("/")
+    public String getIndex(final Model model) {
+        List<ProductResponse> products = cartService.readAll();
+        model.addAttribute("products", products);
+        return "index";
+    }
+
+    @GetMapping("/admin")
+    public String getAdmin(final Model model) {
+        List<ProductResponse> products = cartService.readAll();
+        model.addAttribute("products", products);
+        return "admin";
+    }
+}

src/main/java/cart/dto/ProductRequest.java

@@ -0,0 +1,42 @@
+package cart.dto;
+
+import org.hibernate.validator.constraints.URL;
+
+import javax.validation.constraints.Min;
+import javax.validation.constraints.NotBlank;
+import javax.validation.constraints.NotNull;
+
+public class ProductRequest {
+
+    @NotBlank(message = "상품 명을 입력해주세요.")
+    private String name;
+
+    @NotNull
+    @Min(value = 0, message = "{value} 이상의 가격을 입력해주세요")
+    private int price;
+
+    @NotBlank
+    @URL(message = "유효한 URL 형식을 입력해주세요")
+    private String imageUrl;
+
+    private ProductRequest() {
+    }
+
+    public ProductRequest(final String name, final int price, final String imageUrl) {
+        this.name = name;
+        this.price = price;
+        this.imageUrl = imageUrl;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public int getPrice() {
+        return price;
+    }
+
+    public String getImageUrl() {
+        return imageUrl;
+    }
+}

src/main/java/cart/dto/ProductResponse.java

@@ -0,0 +1,54 @@
+package cart.dto;
+
+import cart.persistence.entity.ProductEntity;
+
+import java.util.Objects;
+
+public class ProductResponse {
+
+    private final Long id;
+    private final String name;
+    private final int price;
+    private final String imageUrl;
+
+    public ProductResponse(final Long id, final String name, final int price, final String imageUrl) {
+        this.id = id;
+        this.name = name;
+        this.price = price;
+        this.imageUrl = imageUrl;
+    }
+
+    public static ProductResponse from(final ProductEntity productEntity) {
+        return new ProductResponse(productEntity.getId(), productEntity.getName(),
+                productEntity.getPrice(), productEntity.getImageUrl());
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public int getPrice() {
+        return price;
+    }
+
+    public String getImageUrl() {
+        return imageUrl;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+        ProductResponse that = (ProductResponse) o;
+        return price == that.price && Objects.equals(id, that.id) && Objects.equals(name, that.name) && Objects.equals(imageUrl, that.imageUrl);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(id, name, price, imageUrl);
+    }
+}

src/main/java/cart/exception/CartControllerAdvice.java

@@ -0,0 +1,26 @@
+package cart.exception;
+
+import org.springframework.dao.EmptyResultDataAccessException;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.MethodArgumentNotValidException;
+import org.springframework.web.bind.annotation.ControllerAdvice;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+
+@ControllerAdvice
+public class CartControllerAdvice {
+    @ExceptionHandler({EmptyResultDataAccessException.class})
+    public ResponseEntity<String> handleEmptyDataAccessException(final EmptyResultDataAccessException e) {
+        return ResponseEntity.badRequest().body("해당하는 상품이 없습니다.");
+    }
+
+    @ExceptionHandler({MethodArgumentNotValidException.class})
+    public ResponseEntity<String> handleValidationException(final MethodArgumentNotValidException e) {
+        final String errorMessage = "잘못된 요청입니다. " + e.getFieldErrors().get(0).getDefaultMessage();
+        return ResponseEntity.badRequest().body(errorMessage);
+    }
+
+    @ExceptionHandler({Exception.class})
+    public ResponseEntity<String> handleException(final Exception e) {
+        return ResponseEntity.internalServerError().body("서버 내부 오류가 발생했습니다.");
+    }
+}

src/main/java/cart/persistence/dao/Dao.java

@@ -0,0 +1,17 @@
+package cart.persistence.dao;
+
+import java.util.List;
+import java.util.Optional;
+
+public interface Dao<T> {
+
+    Long save(T t);
+
+    Optional<T> findById(Long id);
+
+    List<T> findAll();
+
+    void update(T t);
+
+    void deleteById(long id);
+}

src/main/java/cart/persistence/dao/JdbcProductDao.java

@@ -0,0 +1,62 @@
+package cart.persistence.dao;
+
+import cart.persistence.entity.ProductEntity;
+import org.springframework.jdbc.core.JdbcTemplate;
+import org.springframework.jdbc.core.RowMapper;
+import org.springframework.jdbc.core.namedparam.BeanPropertySqlParameterSource;
+import org.springframework.jdbc.core.namedparam.SqlParameterSource;
+import org.springframework.jdbc.core.simple.SimpleJdbcInsert;
+import org.springframework.stereotype.Repository;
+
+import java.util.List;
+import java.util.Optional;
+
+@Repository
+public class JdbcProductDao implements Dao<ProductEntity> {
+
+    private final JdbcTemplate jdbcTemplate;
+    private final SimpleJdbcInsert simpleJdbcInsert;
+    private final RowMapper<ProductEntity> actorRowMapper = (resultSet, rowNum) -> new ProductEntity(
+            resultSet.getLong("product_id"),
+            resultSet.getString("name"),
+            resultSet.getInt("price"),
+            resultSet.getString("image_url")
+    );
+
+    public JdbcProductDao(final JdbcTemplate jdbcTemplate) {
+        this.jdbcTemplate = jdbcTemplate;
+        this.simpleJdbcInsert = new SimpleJdbcInsert(jdbcTemplate)
+                .withTableName("PRODUCT")
+                .usingGeneratedKeyColumns("product_id");
+    }
+
+    @Override
+    public Long save(final ProductEntity productEntity) {
+        final SqlParameterSource parameters = new BeanPropertySqlParameterSource(productEntity);
+        return simpleJdbcInsert.executeAndReturnKey(parameters).longValue();
+    }
+
+    @Override
+    public Optional<ProductEntity> findById(final Long id) {
+        final String sql = "SELECT product_id, name, price, image_url FROM product WHERE product_id = ?";
+        return Optional.ofNullable(jdbcTemplate.queryForObject(sql, actorRowMapper, id));
+    }
+
+    @Override
+    public List<ProductEntity> findAll() {
+        final String sql = "SELECT product_id, name, price, image_url FROM product";
+        return jdbcTemplate.query(sql, actorRowMapper);
+    }
+
+    @Override
+    public void update(final ProductEntity productEntity) {
+        final String sql = "UPDATE product SET name=?, price=?, image_url=? WHERE product_id = ?";
+        jdbcTemplate.update(sql, productEntity.getName(), productEntity.getPrice(), productEntity.getImageUrl(), productEntity.getId());
+    }
+
+    @Override
+    public void deleteById(final long id) {
+        final String sql = "DELETE FROM product WHERE product_id = ?";
+        jdbcTemplate.update(sql, id);
+    }
+}

src/main/java/cart/persistence/entity/ProductEntity.java

@@ -0,0 +1,51 @@
+package cart.persistence.entity;
+
+import java.util.Objects;
+
+public class ProductEntity {
+
+    private final Long id;
+    private final String name;
+    private final int price;
+    private final String imageUrl;
+
+    public ProductEntity(final Long id, final String name, final int price, final String imageUrl) {
+        this.id = id;
+        this.name = name;
+        this.price = price;
+        this.imageUrl = imageUrl;
+    }
+
+    public ProductEntity(final String name, final int price, final String imageUrl) {
+        this(null, name, price, imageUrl);
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public int getPrice() {
+        return price;
+    }
+
+    public String getImageUrl() {
+        return imageUrl;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+        ProductEntity that = (ProductEntity) o;
+        return price == that.price && Objects.equals(id, that.id) && Objects.equals(name, that.name) && Objects.equals(imageUrl, that.imageUrl);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(id, name, price, imageUrl);
+    }
+}