✨ save categories of recipe

backend/src/main/java/net/pengcook/category/domain/Category.java

@@ -4,13 +4,22 @@
 import jakarta.persistence.GeneratedValue;
 import jakarta.persistence.GenerationType;
 import jakarta.persistence.Id;
+import lombok.AccessLevel;
+import lombok.AllArgsConstructor;
+import lombok.NoArgsConstructor;
 
 @Entity
+@NoArgsConstructor(access = AccessLevel.PROTECTED)
+@AllArgsConstructor(access = AccessLevel.PRIVATE)
 public class Category {
 
     @Id
     @GeneratedValue(strategy = GenerationType.IDENTITY)
     private long id;
 
     private String name;
+
+    public Category(String name) {
+        this(0L, name);
+    }
 }

backend/src/main/java/net/pengcook/category/domain/CategoryRecipe.java

@@ -6,9 +6,14 @@
 import jakarta.persistence.Id;
 import jakarta.persistence.JoinColumn;
 import jakarta.persistence.ManyToOne;
+import lombok.AccessLevel;
+import lombok.AllArgsConstructor;
+import lombok.NoArgsConstructor;
 import net.pengcook.recipe.domain.Recipe;
 
 @Entity
+@NoArgsConstructor(access = AccessLevel.PROTECTED)
+@AllArgsConstructor(access = AccessLevel.PRIVATE)
 public class CategoryRecipe {
 
     @Id
@@ -22,4 +27,8 @@ public class CategoryRecipe {
     @ManyToOne
     @JoinColumn(name = "recipe_id")
     private Recipe recipe;
+
+    public CategoryRecipe(Category category, Recipe recipe) {
+        this(0L, category, recipe);
+    }
 }

backend/src/main/java/net/pengcook/category/repository/CategoryRecipeRepository.java

@@ -0,0 +1,7 @@
+package net.pengcook.category.repository;
+
+import net.pengcook.category.domain.CategoryRecipe;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface CategoryRecipeRepository extends JpaRepository<CategoryRecipe, Long> {
+}

backend/src/main/java/net/pengcook/category/repository/CategoryRepository.java

@@ -0,0 +1,10 @@
+package net.pengcook.category.repository;
+
+import java.util.Optional;
+import net.pengcook.category.domain.Category;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface CategoryRepository extends JpaRepository<Category, Long> {
+
+    Optional<Category> findByName(String name);
+}

backend/src/main/java/net/pengcook/category/service/CategoryService.java

@@ -0,0 +1,29 @@
+package net.pengcook.category.service;
+
+import java.util.List;
+import lombok.RequiredArgsConstructor;
+import net.pengcook.category.domain.Category;
+import net.pengcook.category.domain.CategoryRecipe;
+import net.pengcook.category.repository.CategoryRecipeRepository;
+import net.pengcook.category.repository.CategoryRepository;
+import net.pengcook.recipe.domain.Recipe;
+import org.springframework.stereotype.Service;
+
+@Service
+@RequiredArgsConstructor
+public class CategoryService {
+
+    private final CategoryRepository categoryRepository;
+    private final CategoryRecipeRepository categoryRecipeRepository;
+
+    public void saveCategories(Recipe recipe, List<String> categories) {
+        categories.forEach(category -> saveCategoryRecipe(recipe, category));
+    }
+
+    private void saveCategoryRecipe(Recipe recipe, String name) {
+        Category category = categoryRepository.findByName(name)
+                .orElseGet(() -> categoryRepository.save(new Category(name)));
+
+        categoryRecipeRepository.save(new CategoryRecipe(category, recipe));
+    }
+}

backend/src/test/java/net/pengcook/category/service/CategoryServiceTest.java

@@ -0,0 +1,49 @@
+package net.pengcook.category.service;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.junit.jupiter.api.Assertions.assertAll;
+
+import java.time.LocalDate;
+import java.time.LocalTime;
+import java.util.List;
+import net.pengcook.category.repository.CategoryRecipeRepository;
+import net.pengcook.category.repository.CategoryRepository;
+import net.pengcook.recipe.domain.Recipe;
+import net.pengcook.user.domain.User;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.jdbc.AutoConfigureTestDatabase;
+import org.springframework.boot.test.autoconfigure.orm.jpa.DataJpaTest;
+import org.springframework.context.annotation.Import;
+import org.springframework.test.context.jdbc.Sql;
+
+@DataJpaTest
+@Import(CategoryService.class)
+@Sql(scripts = "/data/category.sql")
+class CategoryServiceTest {
+
+    private final long INITIAL_CATEGORY_COUNT = 5;
+    private final long INITIAL_CATEGORY_RECIPE_COUNT = 0;
+
+    @Autowired
+    private CategoryService categoryService;
+    @Autowired
+    private CategoryRepository categoryRepository;
+    @Autowired
+    private CategoryRecipeRepository categoryRecipeRepository;
+
+    @Test
+    @DisplayName("레시피의 카테고리를 저장할 수 있다.")
+    void saveCategories() {
+        User author = new User("[email protected]", "ela", "엘라", "ela.jpg", LocalDate.of(2024, 7, 22), "KOREA");
+        Recipe recipe = new Recipe(1L, "김치볶음밥", author, LocalTime.of(0, 30, 0), "김치볶음밥이미지.jpg", 3, 2, "김치볶음밥 조리법");
+
+        categoryService.saveCategories(recipe, List.of("한식", "매운음식"));
+
+        assertAll(
+                () -> assertThat(categoryRepository.count()).isEqualTo(INITIAL_CATEGORY_COUNT + 1),
+                () -> assertThat(categoryRecipeRepository.count()).isEqualTo(INITIAL_CATEGORY_RECIPE_COUNT + 2)
+        );
+    }
+}

backend/src/test/resources/data/category.sql

@@ -0,0 +1,34 @@
+SET REFERENTIAL_INTEGRITY FALSE;
+
+TRUNCATE TABLE users;
+ALTER TABLE users ALTER COLUMN id RESTART;
+
+TRUNCATE TABLE category;
+ALTER TABLE category ALTER COLUMN id RESTART;
+
+TRUNCATE TABLE ingredient;
+ALTER TABLE ingredient ALTER COLUMN id RESTART;
+
+TRUNCATE TABLE recipe;
+ALTER TABLE recipe ALTER COLUMN id RESTART;
+
+TRUNCATE TABLE category_recipe;
+ALTER TABLE category_recipe ALTER COLUMN id RESTART;
+
+TRUNCATE TABLE ingredient_recipe;
+ALTER TABLE ingredient_recipe ALTER COLUMN id RESTART;
+
+SET REFERENTIAL_INTEGRITY TRUE;
+
+INSERT INTO users (email, username, nickname, image, birth, region)
+VALUES ('[email protected]', 'ela', '엘라', 'ela.jpg', '2024-07-22', 'KOREA');
+
+INSERT INTO category (name)
+VALUES ('한식'),
+       ('양식'),
+       ('채식'),
+       ('건강식'),
+       ('간편식');
+
+INSERT INTO recipe (title, author_id, cooking_time, thumbnail, difficulty, like_count, description)
+VALUES ('김치볶음밥', 1, '00:30:00', '김치볶음밥이미지.jpg', 3, 2, '김치볶음밥 조리법');