update: 상품 조회 API 수정

**AS-IS**
- 정렬 조회만 가능

**TO-BE**
- 필터 및 정렬 조회 가능

Author: Kimjipang

apps/commerce-api/src/main/java/com/loopers/infrastructure/product/ProductRepositoryImpl.java

@@ -41,7 +41,7 @@ public List<Product> findAll() {
 
     @Override
     public List<Product> searchProductsByCondition(ProductV1Dto.SearchProductRequest request) {
-        System.out.println("sortBy = " + request.sortCondition().sortBy());
+
         boolean isAsc = request.sortCondition().order().equals("asc");
 
         JPAQuery<Product> query = queryFactory
@@ -50,6 +50,10 @@ public List<Product> searchProductsByCondition(ProductV1Dto.SearchProductRequest
                 .on(product.id.eq(like.productId))
                 .groupBy(product.id);
 
+        switch (request.filterCondition().filterBy()) {
+            case "brandId" -> query.where(product.brandId.eq(request.filterCondition().filterValue()));
+        }
+
 
         switch (request.sortCondition().sortBy()) {
             case "price" -> query.orderBy(isAsc ? product.price.asc() : product.price.desc());

apps/commerce-api/src/main/java/com/loopers/interfaces/api/product/ProductV1Dto.java

@@ -32,7 +32,16 @@ public Product toEntity() {
         }
     }
 
-    public record SearchProductRequest(SortCondition sortCondition) {
+    public record SearchProductRequest(FilterCondition filterCondition, SortCondition sortCondition) {
+        public record FilterCondition(String filterBy, Long filterValue) {
+            public void conditionValidate() {
+                if (!filterBy.equals("brandId")) {
+                    throw new CoreException(ErrorType.BAD_REQUEST, "유효하지 않은 필터 조건입니다.");
+                }
+            }
+
+        }
+
         public record SortCondition(String sortBy, String order) {
             public void conditionValidate() {
                 if (!sortBy.equals("price") && !sortBy.equals("likeCount") && !sortBy.equals("createdAt")) {