전남대 BE_정호성_1주차 과제(2단계)

README.md

@@ -1 +1,23 @@
-# spring-gift-product
+# spring-gift-product
+
+구현할 기능 목록
+
+## step1
+
+상품 정보 DTO - record로 구현 (gift.web.dto.Product)
+
+HTTP API - ProductController (gift.web.ProductController)
+
+- POST
+- GET
+- PUT / PATCH
+- DELETE
+
+## step2
+
+상품을 조회, 추가, 수정, 삭제할 수 있는 관리자 화면을 구현한다.
+
+Thymeleaf를 사용해, HTML 폼 전송을 이용한 페이지 이동을 기반으로 구현
+
+* ProductController로 view를 반환하도록 재작성
+* index(product) html, create update html 작성

src/main/java/gift/web/ProductController.java

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+package gift.web;
+
+import gift.web.dto.Product;
+import java.util.List;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+
+@RestController //컨트롤러를 JSON을 반환하는 컨트롤러로 만들어줌
+@RequestMapping("/api/products")
+public class ProductController {
+
+    private final ProductService productService;
+
+    public ProductController(ProductService productService) {
+        this.productService = productService;
+    }
+
+    @GetMapping
+    public ResponseEntity<List<Product>> getProducts() {
+        return new ResponseEntity<>(productService.getProducts(), HttpStatus.OK);
+    }
+
+    // products/{상품번호}의 GetMapping
+    @GetMapping("/{id}") //Query Param과 Path Variable 사용의 차이점 알아보기
+    public ResponseEntity<Product> getProductById(@PathVariable Long id) {
+        Product product = productService.getProductById(id);
+        if(product != null) {
+            return new ResponseEntity<>(product, HttpStatus.OK);
+        }
+        return new ResponseEntity<>(HttpStatus.NOT_FOUND);
+    }
+
+    @PostMapping
+    public ResponseEntity<?> createProduct(@RequestBody Product product) {
+        return new ResponseEntity<>(productService.createProduct(product), HttpStatus.CREATED);
+    }
+
+    // PUT은 업데이트시 존재하지 않는다면, 생성을 하게 되는데, POST와의 차이점?이 뭔 지 알아보기
+    // PUT 구현
+    @PutMapping("/{id}")
+    public ResponseEntity<?> updateProduct(@PathVariable Long id, @RequestBody Product product) {
+        boolean exists = productService.getProductById(id) != null;
+        productService.updateProduct(id, product);
+        if(exists) {
+            return ResponseEntity.ok(product);
+        }
+        return ResponseEntity.status(HttpStatus.CREATED).body(product);
+    }
+
+    @DeleteMapping("/{id}")
+    public ResponseEntity<?> deleteProduct(@PathVariable Long id) {
+        if(productService.deleteProduct(id)) {
+            return ResponseEntity.ok("Delete Success");
+        }
+        return ResponseEntity.status(HttpStatus.NOT_FOUND).body("Product Not Found");
+    }
+}

src/main/java/gift/web/ProductService.java

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+package gift.web;
+
+import gift.web.dto.Product;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.atomic.AtomicLong;
+import org.springframework.stereotype.Service;
+
+@Service
+public class ProductService {
+    private final Map<Long, Product> products = new HashMap<>();
+    private final AtomicLong incrementCounter = new AtomicLong(1); // ID를 관리할 변수
+
+    public List<Product> getProducts() {
+        return List.copyOf(products.values());
+    }
+
+    public Product getProductById(Long id) {
+        return products.get(id);
+    }
+
+    public Product createProduct(Product product) {
+        Long id = incrementCounter.getAndIncrement(); // 1씩 증가하는 id
+        Product newProduct = new Product(id, product.name(), product.price(), product.imageUrl());
+        products.put(id, newProduct);
+
+        return newProduct;
+    }
+
+    public Product updateProduct(Long id, Product product) {
+        products.put(id, product);
+        return product;
+    }
+
+    public boolean deleteProduct(Long id) {
+        return products.remove(id) != null;
+    }
+}

src/main/java/gift/web/dto/AdminController.java

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+package gift.web.dto;
+
+import gift.web.ProductService;
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.Model;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.ModelAttribute;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+
+@Controller
+@RequestMapping("/admin/products")
+public class AdminController {
+    private final ProductService productService;
+
+    public AdminController(ProductService productService) {
+        this.productService = productService;
+    }
+
+    @GetMapping
+    public String getProducts(Model model) {
+        model.addAttribute("products", productService.getProducts());
+        return "products";
+    }
+
+    @GetMapping("/{id}")
+    public String getProductById(@PathVariable Long id, Model model) {
+        Product product = productService.getProductById(id);
+        if (product != null) {
+            model.addAttribute("product", product);
+        }
+        return "products";
+    }
+
+    @GetMapping("/create")
+    public String createProductForm(Model model) {
+        model.addAttribute("product", new Product(1L, "name", 0L, "image.url"));
+        return "create";
+    }
+
+    @PostMapping("/create")
+    public String createProduct(@ModelAttribute Product product) {
+        productService.createProduct(product);
+        return "redirect:/admin/products";
+    }
+
+    @GetMapping("/edit/{id}")
+    public String editProductForm(@PathVariable Long id, Model model) {
+        Product product = productService.getProductById(id);
+        if (product != null) {
+            model.addAttribute("product", product);
+        }
+        return "edit";
+    }
+
+    @PostMapping("/edit/{id}")
+    public String editProduct(@PathVariable Long id, @ModelAttribute Product product) {
+        productService.updateProduct(id, product);
+        return "redirect:/admin/products";
+    }
+
+    @PostMapping("/delete/{id}")
+    public String deleteProduct(@PathVariable Long id) {
+        productService.deleteProduct(id);
+        return "redirect:/admin/products";
+    }
+}

src/main/java/gift/web/dto/Product.java

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+package gift.web.dto;
+
+public record Product(Long id, String name, Long price, String imageUrl) {
+}

src/main/resources/templates/create.html

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+<!DOCTYPE html>
+
+<html>
+<head>
+  <title>Product Create</title>
+  <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
+</head>
+<body>
+  <h1>상품 생성</h1>
+  <form th:action="@{/admin/products/create}" th:object="${product}" method="post">
+    <div>
+      <label for="name">상품명:</label>
+      <input type="text" th:field="*{name}" id="name"></input>
+    </div>
+    <div>
+      <label for="price">가격:</label>
+      <input type="text" th:field="*{price}" id="price"></input>
+    </div>
+    <div>
+      <label for="imageUrl">사진주소:</label>
+      <input type="text" th:field="*{imageUrl}" id="imageUrl"></input>
+    </div>
+    <div>
+      <button type="submit">Create</button>
+    </div>
+  </form>
+</body>
+</html>

src/main/resources/templates/edit.html

@@ -0,0 +1,28 @@
+<!DOCTYPE html>
+
+<html>
+<head>
+  <title>Product Create</title>
+  <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
+</head>
+<body>
+<h1>상품 수정</h1>
+<form th:action="@{/admin/products/edit/{id}(id=${product.id()})}" th:object="${product}" method="post">
+  <div>
+    <label for="name">상품명:</label>
+    <input type="text" th:field="*{name}" id="name"></input>
+  </div>
+  <div>
+    <label for="price">가격:</label>
+    <input type="text" th:field="*{price}" id="price"></input>
+  </div>
+  <div>
+    <label for="imageUrl">사진주소:</label>
+    <input type="text" th:field="*{imageUrl}" id="imageUrl"></input>
+  </div>
+  <div>
+    <button type="submit">Update</button>
+  </div>
+</form>
+</body>
+</html>

src/main/resources/templates/products.html

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+<!DOCTYPE html>
+
+<html>
+<head>
+  <title>Products</title>
+  <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
+</head>
+<body>
+  <h1>상품 목록</h1>
+  <a href="/admin/products/create">새 상품 만들기</a>
+  <table>
+    <tr>
+      <th>ID</th>
+      <th>Name</th>
+      <th>Price</th>
+      <th>Actions</th>
+    </tr>
+    <tr th:each="product : ${products}">
+      <td th:text="${product.id()}">1</td>
+      <td th:text="${product.name()}">상품 이름예시</td>
+      <td th:text="${product.price()}">5000</td>
+      <td th:text="${product.imageUrl()}">https://image.jpg</td>
+      <td>
+        <a th:href="@{/admin/products/edit/{id}(id=${product.id()})}">Edit</a>
+        <form th:action="@{/admin/products/delete/{id}(id=${product.id()})}" method="post" style="display:inline;">
+          <button type="submit">Delete</button>
+        </form>
+      </td>
+    </tr>
+  </table>
+</body>
+</html>