product-api: update sol

Author: mama-samba-braima

src/main/java/com/amigoscode/product/Product.java

@@ -37,7 +37,8 @@ public class Product {
 
     private Instant deletedAt;
 
-    public Product() {}
+    public Product() {
+    }
 
     public Product(UUID id,
                    String name,
@@ -54,16 +55,16 @@ public Product(UUID id,
     }
 
     @PrePersist
-    public void prePersist(){
-        if(this.id == null) {
+    public void prePersist() {
+        if (this.id == null) {
             this.id = UUID.randomUUID();
         }
         this.createdAt = Instant.now();
         this.updatedAt = Instant.now();
     }
 
     @PreUpdate
-    public void preUpdate(){
+    public void preUpdate() {
         this.updatedAt = Instant.now();
     }
 

src/main/java/com/amigoscode/product/ProductController.java

@@ -34,4 +34,10 @@ public void deleteProductById(@PathVariable("id") UUID id) {
     public UUID saveProduct(@RequestBody NewProductRequest product) {
         return productService.saveNewProduct(product);
     }
+
+    @PutMapping("{id}")
+    public void updateProduct(@PathVariable UUID id,
+                              @RequestBody UpdateProductRequest request) {
+        productService.updateProduct(id, request);
+    }
 }

src/main/java/com/amigoscode/product/ProductService.java

@@ -2,6 +2,9 @@
 
 import com.amigoscode.exception.ResourceNotFound;
 import org.springframework.stereotype.Service;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PutMapping;
+import org.springframework.web.bind.annotation.RequestBody;
 
 import java.util.List;
 import java.util.UUID;
@@ -68,4 +71,30 @@ private Function<Product, ProductResponse> mapToResponse() {
         );
     }
 
+
+    public void updateProduct(UUID id,
+                              UpdateProductRequest updateRequest) {
+        Product product = productRepository.findById(id)
+                .orElseThrow(() -> new ResourceNotFound(
+                        "product with id [" + id + "] not found"
+                ));
+
+        if (updateRequest.name() != null && !updateRequest.name().equals(product.getName())) {
+            product.setName(updateRequest.name());
+        }
+        if (updateRequest.description() != null && !updateRequest.description().equals(product.getDescription())) {
+            product.setDescription(updateRequest.description());
+        }
+        if (updateRequest.price() != null && !updateRequest.price().equals(product.getPrice())) {
+            product.setPrice(updateRequest.price());
+        }
+        if (updateRequest.imageUrl() != null && !updateRequest.imageUrl().equals(product.getImageUrl())) {
+            product.setImageUrl(updateRequest.imageUrl());
+        }
+        if (updateRequest.stockLevel() != null && !updateRequest.stockLevel().equals(product.getStockLevel())) {
+            product.setStockLevel(updateRequest.stockLevel());
+        }
+
+        productRepository.save(product);
+    }
 }

src/main/java/com/amigoscode/product/UpdateProductRequest.java

@@ -0,0 +1,12 @@
+package com.amigoscode.product;
+
+import java.math.BigDecimal;
+
+public record UpdateProductRequest(
+        String name,
+        String description,
+        String imageUrl,
+        BigDecimal price,
+        Integer stockLevel
+) {
+}