Merge pull request #8 from don-bigdad/cart-dev

Cart dev

src/main/java/com/example/springbootbookshop/controller/BookController.java

@@ -28,7 +28,7 @@
 @Tag(name = "Book management",description = "Endpoints for managing books")
 @RestController
 @Validated
-@RequestMapping(value = "/books")
+@RequestMapping("/books")
 public class BookController {
     private final BookService bookService;
 
@@ -41,23 +41,23 @@ public List<BookDto> getAll(@PageableDefault(size = 5, page = 0)
         return bookService.findAll(pageable);
     }
 
-    @DeleteMapping(value = "/{id}")
+    @DeleteMapping("/{id}")
     @PreAuthorize("hasRole('ADMIN')")
     @Operation(summary = "Delete book by id")
     @ResponseStatus(HttpStatus.NO_CONTENT)
     public void deleteBookById(@PathVariable @Positive Long id) {
         bookService.deleteById(id);
     }
 
-    @GetMapping(value = "/{id}")
+    @GetMapping("/{id}")
     @Operation(summary = "Get book by Id from DB")
     @PreAuthorize("hasRole('USER')")
     @ResponseStatus(HttpStatus.OK)
     public BookDto getBookById(@PathVariable @Positive Long id) {
         return bookService.getBookById(id);
     }
 
-    @PutMapping(value = "/{id}")
+    @PutMapping("/{id}")
     @PreAuthorize("hasRole('ADMIN')")
     @Operation(summary = "Update book by Id in DB")
     @ResponseStatus(HttpStatus.OK)

src/main/java/com/example/springbootbookshop/controller/CartController.java

@@ -0,0 +1,73 @@
+package com.example.springbootbookshop.controller;
+
+import com.example.springbootbookshop.dto.cart.CartDto;
+import com.example.springbootbookshop.dto.cart.item.CartItemDto;
+import com.example.springbootbookshop.dto.cart.item.RequestCartItemDto;
+import com.example.springbootbookshop.dto.cart.item.UpdateRequestCartItemDto;
+import com.example.springbootbookshop.entity.User;
+import com.example.springbootbookshop.service.CartService;
+import io.swagger.v3.oas.annotations.Operation;
+import io.swagger.v3.oas.annotations.tags.Tag;
+import jakarta.validation.Valid;
+import jakarta.validation.constraints.Positive;
+import lombok.RequiredArgsConstructor;
+import org.springframework.http.HttpStatus;
+import org.springframework.security.access.prepost.PreAuthorize;
+import org.springframework.security.core.Authentication;
+import org.springframework.validation.annotation.Validated;
+import org.springframework.web.bind.annotation.DeleteMapping;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.PutMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.ResponseStatus;
+import org.springframework.web.bind.annotation.RestController;
+
+@RequiredArgsConstructor
+@Tag(name = "Cart management",description = "Endpoints for managing carts")
+@RestController
+@Validated
+@RequestMapping("/cart")
+public class CartController {
+    private final CartService cartService;
+
+    @GetMapping
+    @Operation(summary = "Get cart by user id from DB")
+    @PreAuthorize("hasRole('USER')")
+    public CartDto getUserCart(Authentication authentication) {
+        return cartService.findById(getUserId(authentication));
+    }
+
+    @PostMapping
+    @Operation(summary = "Add books to the user cart")
+    @PreAuthorize("hasRole('USER')")
+    public CartItemDto addItemToCart(Authentication authentication,
+                                     @Valid @RequestBody RequestCartItemDto cartItem) {
+        return cartService.addItemToCart(getUserId(authentication), cartItem);
+    }
+
+    @DeleteMapping("cart-items/{id}")
+    @Operation(summary = "Delete cart item from the user cart")
+    @PreAuthorize("hasRole('USER')")
+    @ResponseStatus(HttpStatus.NO_CONTENT)
+    public void removeCartItem(Authentication authentication,
+                               @PathVariable @Positive Long id) {
+        cartService.removeItem(getUserId(authentication), id);
+    }
+
+    @PutMapping("cart-items/{id}")
+    @Operation(summary = "Update cart item in the user cart")
+    @PreAuthorize("hasRole('USER')")
+    @ResponseStatus(HttpStatus.OK)
+    public CartItemDto updateItemQuantity(@PathVariable @Positive Long id,
+                                          @RequestBody @Valid UpdateRequestCartItemDto quantity) {
+        return cartService.updateCartItem(id, quantity);
+    }
+
+    private Long getUserId(Authentication authentication) {
+        User user = (User) authentication.getPrincipal();
+        return user.getId();
+    }
+}

src/main/java/com/example/springbootbookshop/dto/cart/CartDto.java

@@ -0,0 +1,9 @@
+package com.example.springbootbookshop.dto.cart;
+
+import com.example.springbootbookshop.dto.cart.item.CartItemDto;
+import java.util.Set;
+
+public record CartDto(Long id,
+                      Long userId,
+                      Set<CartItemDto> cartItems) {
+}

src/main/java/com/example/springbootbookshop/dto/cart/item/CartItemDto.java

@@ -0,0 +1,7 @@
+package com.example.springbootbookshop.dto.cart.item;
+
+public record CartItemDto(Long id,
+                          Long bookId,
+                          String bookTitle,
+                          Integer quantity){
+}

src/main/java/com/example/springbootbookshop/dto/cart/item/RequestCartItemDto.java

@@ -0,0 +1,7 @@
+package com.example.springbootbookshop.dto.cart.item;
+
+import jakarta.validation.constraints.Positive;
+
+public record RequestCartItemDto(@Positive Long bookId,
+                                 @Positive Integer quantity) {
+}

src/main/java/com/example/springbootbookshop/dto/cart/item/UpdateRequestCartItemDto.java

@@ -0,0 +1,6 @@
+package com.example.springbootbookshop.dto.cart.item;
+
+import jakarta.validation.constraints.Positive;
+
+public record UpdateRequestCartItemDto(@Positive Integer quantity) {
+}

src/main/java/com/example/springbootbookshop/entity/Book.java

@@ -1,5 +1,6 @@
 package com.example.springbootbookshop.entity;
 
+import jakarta.persistence.CascadeType;
 import jakarta.persistence.Column;
 import jakarta.persistence.Entity;
 import jakarta.persistence.GeneratedValue;
@@ -8,9 +9,12 @@
 import jakarta.persistence.JoinColumn;
 import jakarta.persistence.JoinTable;
 import jakarta.persistence.ManyToMany;
+import jakarta.persistence.OneToMany;
 import jakarta.persistence.Table;
 import java.math.BigDecimal;
+import java.util.ArrayList;
 import java.util.HashSet;
+import java.util.List;
 import java.util.Set;
 import lombok.Data;
 import lombok.EqualsAndHashCode;
@@ -49,4 +53,7 @@ public class Book {
     @ToString.Exclude
     @EqualsAndHashCode.Exclude
     private Set<Category> categories = new HashSet<>();
+
+    @OneToMany(mappedBy = "book",orphanRemoval = true, cascade = CascadeType.REMOVE)
+    private List<CartItem> cartItems = new ArrayList<>();
 }

src/main/java/com/example/springbootbookshop/entity/Cart.java

@@ -0,0 +1,42 @@
+package com.example.springbootbookshop.entity;
+
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.FetchType;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import jakarta.persistence.JoinColumn;
+import jakarta.persistence.OneToMany;
+import jakarta.persistence.OneToOne;
+import jakarta.persistence.Table;
+import java.util.HashSet;
+import java.util.Set;
+import lombok.Data;
+import lombok.EqualsAndHashCode;
+import lombok.ToString;
+import org.hibernate.annotations.SQLDelete;
+import org.hibernate.annotations.Where;
+
+@Entity
+@Data
+@SQLDelete(sql = "UPDATE carts SET is_deleted = true WHERE id = ?")
+@Where(clause = "is_deleted=false")
+@Table(name = "carts")
+public class Cart {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    @OneToOne(fetch = FetchType.LAZY, optional = false)
+    @ToString.Exclude
+    @EqualsAndHashCode.Exclude
+    @JoinColumn(name = "user_id", nullable = false)
+    private User user;
+
+    @OneToMany(mappedBy = "cart")
+    private Set<CartItem> cartItems = new HashSet<>();
+
+    @Column(nullable = false)
+    private boolean isDeleted = false;
+}

src/main/java/com/example/springbootbookshop/entity/CartItem.java

@@ -0,0 +1,38 @@
+package com.example.springbootbookshop.entity;
+
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.FetchType;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import jakarta.persistence.JoinColumn;
+import jakarta.persistence.ManyToOne;
+import jakarta.persistence.Table;
+import jakarta.validation.constraints.NotNull;
+import lombok.Data;
+import lombok.EqualsAndHashCode;
+import lombok.ToString;
+
+@Entity
+@Data
+@Table(name = "cart_items")
+public class CartItem {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    @ManyToOne(fetch = FetchType.LAZY, optional = false)
+    @ToString.Exclude
+    @EqualsAndHashCode.Exclude
+    @JoinColumn(name = "cart_id", nullable = false)
+    private Cart cart;
+
+    @ManyToOne(fetch = FetchType.LAZY, optional = false)
+    @JoinColumn(name = "book_id", nullable = false)
+    private Book book;
+
+    @Column(nullable = false)
+    @NotNull
+    private int quantity;
+}

src/main/java/com/example/springbootbookshop/mapper/CartItemMapper.java

@@ -0,0 +1,21 @@
+package com.example.springbootbookshop.mapper;
+
+import com.example.springbootbookshop.dto.cart.item.CartItemDto;
+import com.example.springbootbookshop.dto.cart.item.RequestCartItemDto;
+import com.example.springbootbookshop.entity.CartItem;
+import org.mapstruct.InjectionStrategy;
+import org.mapstruct.Mapper;
+import org.mapstruct.Mapping;
+import org.mapstruct.NullValueCheckStrategy;
+
+@Mapper(componentModel = "spring",
+        injectionStrategy = InjectionStrategy.CONSTRUCTOR,
+        nullValueCheckStrategy = NullValueCheckStrategy.ALWAYS,
+        implementationPackage = "<PACKAGE_NAME>.impl")
+public interface CartItemMapper {
+    @Mapping(source = "book.id", target = "bookId")
+    @Mapping(source = "book.title", target = "bookTitle")
+    CartItemDto toDto(CartItem cartItem);
+
+    CartItem toEntity(RequestCartItemDto cartItemDto);
+}

src/main/java/com/example/springbootbookshop/mapper/CartMapper.java

@@ -0,0 +1,22 @@
+package com.example.springbootbookshop.mapper;
+
+import com.example.springbootbookshop.dto.cart.CartDto;
+import com.example.springbootbookshop.dto.cart.item.RequestCartItemDto;
+import com.example.springbootbookshop.entity.Cart;
+import org.mapstruct.InjectionStrategy;
+import org.mapstruct.Mapper;
+import org.mapstruct.Mapping;
+import org.mapstruct.NullValueCheckStrategy;
+
+@Mapper(componentModel = "spring",
+        injectionStrategy = InjectionStrategy.CONSTRUCTOR,
+        nullValueCheckStrategy = NullValueCheckStrategy.ALWAYS,
+        implementationPackage = "<PACKAGE_NAME>.impl",
+        uses = CartItemMapper.class
+)
+public interface CartMapper {
+    @Mapping(source = "user.id", target = "userId")
+    CartDto toDto(Cart cart);
+
+    Cart toEntity(RequestCartItemDto cart);
+}

src/main/java/com/example/springbootbookshop/repository/CartItemsRepository.java

@@ -0,0 +1,17 @@
+package com.example.springbootbookshop.repository;
+
+import com.example.springbootbookshop.entity.Book;
+import com.example.springbootbookshop.entity.Cart;
+import com.example.springbootbookshop.entity.CartItem;
+import java.util.Optional;
+import org.springframework.data.jpa.repository.EntityGraph;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public interface CartItemsRepository extends JpaRepository<CartItem, Long> {
+    @EntityGraph(attributePaths = "book")
+    Optional<CartItem> findByCartAndBook(Cart cart, Book book);
+
+    Optional<CartItem> getCartItemsByIdAndCartId(Long itemId,Long cartId);
+}

src/main/java/com/example/springbootbookshop/repository/CartRepository.java

@@ -0,0 +1,13 @@
+package com.example.springbootbookshop.repository;
+
+import com.example.springbootbookshop.entity.Cart;
+import java.util.Optional;
+import org.springframework.data.jpa.repository.EntityGraph;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public interface CartRepository extends JpaRepository<Cart,Long> {
+    @EntityGraph(attributePaths = {"user","cartItems"})
+    Optional<Cart> getCartByUserId(Long id);
+}

src/main/java/com/example/springbootbookshop/service/CartService.java

@@ -0,0 +1,16 @@
+package com.example.springbootbookshop.service;
+
+import com.example.springbootbookshop.dto.cart.CartDto;
+import com.example.springbootbookshop.dto.cart.item.CartItemDto;
+import com.example.springbootbookshop.dto.cart.item.RequestCartItemDto;
+import com.example.springbootbookshop.dto.cart.item.UpdateRequestCartItemDto;
+
+public interface CartService {
+    CartDto findById(Long id);
+
+    CartItemDto addItemToCart(Long id, RequestCartItemDto requestCartItemDto);
+
+    void removeItem(Long userId, Long itemId);
+
+    CartItemDto updateCartItem(Long id, UpdateRequestCartItemDto quantity);
+}