add model, repo, service, common

ShoppingCart/Backend/src/main/java/com/yen/ShoppingCart/common/ApiResponse.java

@@ -0,0 +1,27 @@
+package com.yen.ShoppingCart.common;
+
+import java.time.LocalDateTime;
+
+// TODO : modify to enums
+
+public class ApiResponse {
+    private final boolean success;
+    private final String message;
+
+    public ApiResponse(boolean success, String message) {
+        this.success = success;
+        this.message = message;
+    }
+
+    public boolean isSuccess() {
+        return success;
+    }
+
+    public String getMessage() {
+        return message;
+    }
+
+    public String getTimestamp() {
+        return LocalDateTime.now().toString();
+    }
+}

ShoppingCart/Backend/src/main/java/com/yen/ShoppingCart/model/Category.java

@@ -0,0 +1,81 @@
+package com.yen.ShoppingCart.model;
+
+import javax.persistence.CascadeType;
+import javax.persistence.Column;
+import javax.persistence.Entity;
+import javax.persistence.FetchType;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+import javax.persistence.OneToMany;
+import javax.persistence.Table;
+
+
+@Entity
+@Table(name = "categories")
+public class Category {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Integer id;
+
+    @Column(name = "category_name")
+    private String categoryName;
+
+    private String description;
+
+    private String imageUrl;
+
+
+    public Category() {
+    }
+
+    public Category(String categoryName, String description) {
+        this.categoryName = categoryName;
+        this.description = description;
+    }
+
+    public Category(String categoryName, String description,String imageUrl) {
+        this.categoryName = categoryName;
+        this.description = description;
+        this.imageUrl = imageUrl;
+    }
+
+    public String getCategoryName() {
+        return this.categoryName;
+    }
+
+    public void setCategoryName(String categoryName) {
+        this.categoryName = categoryName;
+    }
+
+    public String getDescription() {
+        return description;
+    }
+
+    public void setDescription(String description) {
+        this.description = description;
+    }
+
+    @Override
+    public String toString() {
+        return "User {category id=" + id + ", category name='" + categoryName + "', description='" + description + "'}";
+    }
+
+    public String getImageUrl() {
+        return imageUrl;
+    }
+
+    public void setImageUrl(String imageUrl) {
+        this.imageUrl = imageUrl;
+    }
+
+    public Integer getId() {
+        return id;
+    }
+
+    public void setId(Integer id) {
+        this.id = id;
+    }
+
+}

ShoppingCart/Backend/src/main/java/com/yen/ShoppingCart/repository/Categoryrepository.java

@@ -0,0 +1,12 @@
+package com.yen.ShoppingCart.repository;
+
+import com.yen.ShoppingCart.model.Category;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public interface Categoryrepository extends JpaRepository<Category, Integer> {
+
+    public Category findByCategoryName(String categoryName);
+
+}

ShoppingCart/Backend/src/main/java/com/yen/ShoppingCart/service/CategoryService.java

@@ -0,0 +1,43 @@
+package com.yen.ShoppingCart.service;
+
+import com.yen.ShoppingCart.model.Category;
+import com.yen.ShoppingCart.repository.Categoryrepository;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+import javax.transaction.Transactional;
+import java.util.List;
+import java.util.Optional;
+
+@Service
+public class CategoryService {
+
+    @Autowired
+    private Categoryrepository categoryrepository;
+
+    public List<Category> listCategories() {
+
+        return categoryrepository.findAll();
+    }
+
+    public void createCategory(Category category) {
+        categoryrepository.save(category);
+    }
+
+    public Category readCategory(String categoryName) {
+        return categoryrepository.findByCategoryName(categoryName);
+    }
+
+    public Optional<Category> readCategory(Integer categoryId) {
+        return categoryrepository.findById(categoryId);
+    }
+
+    public void updateCategory(Integer categoryID, Category newCategory) {
+        Category category = categoryrepository.findById(categoryID).get();
+        category.setCategoryName(newCategory.getCategoryName());
+        category.setDescription(newCategory.getDescription());
+        category.setImageUrl(newCategory.getImageUrl());
+        categoryrepository.save(category);
+    }
+
+}