Cadastro de categorias v1.0

src/main/java/br/com/zupacademy/giovannimoratto/ecommerce/new_category/CategoryController.java

@@ -0,0 +1,30 @@
+package br.com.zupacademy.giovannimoratto.ecommerce.new_category;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RestController;
+
+import javax.transaction.Transactional;
+import javax.validation.Valid;
+
+/**
+ * @Author giovanni.moratto
+ */
+
+@RestController
+public class CategoryController {
+
+    @Autowired
+    private CategoryRepository repository;
+
+    /* Methods */
+    // POST Request - Register a new Category
+    @PostMapping("/new_category") // Endpoint
+    @Transactional
+    public void addNewCategory(@RequestBody @Valid CategoryRequest request) {
+        CategoryModel newCategory = request.toModel(repository);
+        repository.save(newCategory);
+    }
+
+}

src/main/java/br/com/zupacademy/giovannimoratto/ecommerce/new_category/CategoryModel.java

@@ -0,0 +1,44 @@
+package br.com.zupacademy.giovannimoratto.ecommerce.new_category;
+
+import javax.persistence.*;
+
+/**
+ * @Author giovanni.moratto
+ */
+
+@Entity
+@Table(name = "tb_categorias")
+public class CategoryModel {
+
+    /* Attributes */
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    @Column(name = "ID")
+    private Long id;
+    @Column(name = "NAME", nullable = false)
+    private String name;
+    @ManyToOne
+    @JoinColumn(name = "ID_PARENT_CATEGORY")
+    private CategoryModel parentCategory;
+
+    /* Constructors */
+    // Default - JPA
+    @Deprecated
+    public CategoryModel() {
+    }
+
+    public CategoryModel(String name, CategoryModel parentCategory) {
+        this.name = name;
+        this.parentCategory = parentCategory;
+    }
+
+    public CategoryModel(String name) {
+        this.name = name;
+    }
+
+    // Check if the category exists in CategoryControllerTest
+    public Long getId() {
+        return id;
+    }
+
+}

src/main/java/br/com/zupacademy/giovannimoratto/ecommerce/new_category/CategoryRepository.java

@@ -0,0 +1,18 @@
+package br.com.zupacademy.giovannimoratto.ecommerce.new_category;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+import java.util.Optional;
+
+/**
+ * @Author giovanni.moratto
+ */
+
+@Repository
+public interface CategoryRepository extends JpaRepository <CategoryModel, Long> {
+
+    Optional <CategoryModel> findByName(String name);
+
+    int countByName(String name);
+}

src/main/java/br/com/zupacademy/giovannimoratto/ecommerce/new_category/CategoryRequest.java

@@ -0,0 +1,36 @@
+package br.com.zupacademy.giovannimoratto.ecommerce.new_category;
+
+import br.com.zupacademy.giovannimoratto.ecommerce.validations.annotations.ExistsId;
+import br.com.zupacademy.giovannimoratto.ecommerce.validations.annotations.Unique;
+
+import javax.validation.constraints.NotBlank;
+import javax.validation.constraints.Positive;
+
+/**
+ * @Author giovanni.moratto
+ */
+
+public class CategoryRequest {
+
+    /* Attributes */
+    @NotBlank
+    @Unique(domainClass = CategoryModel.class, fieldName = "name")
+    private final String name;
+    @ExistsId(domainClass = CategoryModel.class)
+    private final Long idParentCategory;
+
+    public CategoryRequest(String name, Long idParentCategory) {
+        this.name = name;
+        this.idParentCategory = idParentCategory;
+    }
+
+    /* Methods */
+    public CategoryModel toModel(CategoryRepository repository) {
+        if (idParentCategory != null) {
+            CategoryModel optionalCategory = repository.findById(idParentCategory).orElseThrow();
+            return new CategoryModel(name, optionalCategory);
+        }
+        return new CategoryModel(name);
+    }
+
+}

src/main/java/br/com/zupacademy/giovannimoratto/ecommerce/new_user/UserController.java

@@ -19,11 +19,12 @@ public class UserController {
     private UserRepository repository;
 
     /* Methods */
-    // POST Request - Register an author
+    // POST Request - Register a new User
     @PostMapping("/new_user") // Endpoint
     @Transactional
     public void addNewUser(@RequestBody @Valid UserRequest request) {
         UserModel newUser = request.toModel();
         repository.save(newUser);
     }
-}
+
+}

src/main/java/br/com/zupacademy/giovannimoratto/ecommerce/validations/annotations/ExistsId.java

@@ -0,0 +1,28 @@
+package br.com.zupacademy.giovannimoratto.ecommerce.validations.annotations;
+
+import javax.validation.Constraint;
+import javax.validation.Payload;
+import java.lang.annotation.*;
+
+/**
+ * @Author giovanni.moratto
+ */
+
+@Documented
+@Constraint(validatedBy = {ExistsIdValidator.class})
+@Target({
+        ElementType.METHOD, ElementType.FIELD, ElementType.ANNOTATION_TYPE, ElementType.CONSTRUCTOR,
+        ElementType.PARAMETER, ElementType.TYPE_USE
+})
+@Retention(RetentionPolicy.RUNTIME)
+public @interface ExistsId {
+
+    Class <?> domainClass();
+
+    String message() default "This ID does not exists!";
+
+    Class <?>[] groups() default {};
+
+    Class <? extends Payload>[] payload() default {};
+
+}

src/main/java/br/com/zupacademy/giovannimoratto/ecommerce/validations/annotations/ExistsIdValidator.java

@@ -0,0 +1,37 @@
+package br.com.zupacademy.giovannimoratto.ecommerce.validations.annotations;
+
+import javax.persistence.EntityManager;
+import javax.persistence.PersistenceContext;
+import javax.persistence.Query;
+import javax.validation.ConstraintValidator;
+import javax.validation.ConstraintValidatorContext;
+
+/**
+ * @Author giovanni.moratto
+ */
+
+public class ExistsIdValidator implements ConstraintValidator <ExistsId, Long> {
+
+    @PersistenceContext
+    private EntityManager em;
+
+    /* Attributes */
+    private String object;
+
+    @Override
+    public void initialize(ExistsId constraintAnnotation) {
+        object = constraintAnnotation.domainClass().getSimpleName();
+    }
+
+    @Override
+    public boolean isValid(Long id, ConstraintValidatorContext context) {
+        if (id == null) {
+            return true;
+        }
+        Query query = em.createQuery("SELECT 1 FROM " + object + " o WHERE o.id = :VALUE");
+        query.setParameter("VALUE", id);
+
+        return !query.getResultList().isEmpty();
+    }
+
+}

src/main/resources/messages.properties

@@ -4,4 +4,9 @@ NotBlank.userRequest.login=Login é obrigatório.
 NotBlank.userRequest.password=Senha é obrigatória.
 Email.userRequest.login=Login deve ter um formato de e-mail válido.
 Unique.userRequest.login=Login já cadastrado!
-Size.userRequest.password=Senha deve ter ao menos 6 caracteres.
+Size.userRequest.password=Senha deve ter ao menos 6 caracteres.
+
+#New Category
+NotBlank.categoryRequest.name=Nome é obrigatório.
+Unique.categoryRequest.name=Nome já cadastrado!
+ExistsId.categoryRequest.idParentCategory=Essa Categoria não existe.

src/test/java/br/com/zupacademy/giovannimoratto/ecommerce/EcommerceApplicationTests.java

@@ -12,6 +12,7 @@ class EcommerceApplicationTests {
 
 	@Test
 	void contextLoads() {
+		EcommerceApplication.main(new String[0]);
 		Assertions.assertTrue(true);
 	}