first commit
This commit is contained in:
Beyhan Oğur
237
controllers/api_cart_controller.go
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237
controllers/api_cart_controller.go
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package controllers
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import (
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database "ares/database/config"
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"ares/database/models"
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"errors"
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"net/http"
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"strconv"
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"github.com/gofiber/fiber/v3"
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"gorm.io/gorm"
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)
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// getOrCreateCart is a helper to fetch the cart of the current user.
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func getOrCreateCart(userID uint) (models.Cart, error) {
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var cart models.Cart
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if err := database.DB.Preload("Items").Preload("Items.Product").Where("user_id = ?", userID).First(&cart).Error; err != nil {
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if errors.Is(err, gorm.ErrRecordNotFound) {
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cart = models.Cart{UserID: userID}
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if createErr := database.DB.Create(&cart).Error; createErr != nil {
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return cart, createErr
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}
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return cart, nil
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}
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return cart, err
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}
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return cart, nil
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}
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// GetMyCart godoc
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// @Summary Get the current user's cart
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// @Tags Cart
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// @Produce json
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// @Security BearerAuth
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// @Success 200 {object} models.CartDoc
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// @Failure 401 {object} map[string]string
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// @Router /api/v1/cart [get]
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func GetMyCart(c fiber.Ctx) error {
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userID, ok := c.Locals("user_id").(uint)
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if !ok || userID == 0 {
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return c.Status(http.StatusUnauthorized).JSON(fiber.Map{"error": "unauthorized"})
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}
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cart, err := getOrCreateCart(userID)
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if err != nil {
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return c.Status(http.StatusInternalServerError).JSON(fiber.Map{"error": "could not load cart"})
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}
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return c.JSON(cart)
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}
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// AddToCartRequest represents the body for adding to a cart
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type AddToCartRequest struct {
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ProductID uint `json:"product_id" validate:"required"`
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Quantity int `json:"quantity" validate:"required,min=1"`
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}
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// AddToCart godoc
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// @Summary Add item to cart
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// @Tags Cart
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// @Accept json
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// @Produce json
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// @Security BearerAuth
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// @Param data body AddToCartRequest true "Cart Item Details"
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// @Success 200 {object} models.CartDoc
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// @Failure 400 {object} map[string]string
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// @Failure 401 {object} map[string]string
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// @Failure 404 {object} map[string]string
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// @Router /api/v1/cart/items [post]
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func AddToCart(c fiber.Ctx) error {
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userID, ok := c.Locals("user_id").(uint)
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if !ok || userID == 0 {
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return c.Status(http.StatusUnauthorized).JSON(fiber.Map{"error": "unauthorized"})
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}
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var input AddToCartRequest
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if err := c.Bind().Body(&input); err != nil {
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return c.Status(http.StatusBadRequest).JSON(fiber.Map{"error": "invalid payload"})
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}
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if err := validate.Struct(input); err != nil {
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return c.Status(http.StatusBadRequest).JSON(fiber.Map{"error": err.Error()})
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}
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// Check product exists
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var product models.Product
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if err := database.DB.First(&product, input.ProductID).Error; err != nil {
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return c.Status(http.StatusNotFound).JSON(fiber.Map{"error": "product not found"})
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}
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cart, err := getOrCreateCart(userID)
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if err != nil {
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return c.Status(http.StatusInternalServerError).JSON(fiber.Map{"error": "could not load cart"})
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}
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// Check if item already exists in cart
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var existingItem models.CartItem
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if err := database.DB.Where("cart_id = ? AND product_id = ?", cart.ID, input.ProductID).First(&existingItem).Error; err == nil {
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// Update quantity
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existingItem.Quantity += input.Quantity
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database.DB.Save(&existingItem)
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} else {
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// Create new item
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newItem := models.CartItem{
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CartID: cart.ID,
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ProductID: input.ProductID,
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Quantity: input.Quantity,
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}
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database.DB.Create(&newItem)
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}
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// Return updated cart
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cart, _ = getOrCreateCart(userID)
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return c.JSON(cart)
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}
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// UpdateCartItemRequest represents the body for updating a cart item quantity
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type UpdateCartItemRequest struct {
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Quantity int `json:"quantity" validate:"required,min=1"`
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}
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// UpdateCartItem godoc
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// @Summary Update cart item quantity
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// @Tags Cart
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// @Accept json
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// @Produce json
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// @Security BearerAuth
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// @Param item_id path int true "Cart Item ID"
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// @Param data body UpdateCartItemRequest true "Update Quantity"
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// @Success 200 {object} models.CartDoc
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// @Failure 400 {object} map[string]string
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// @Failure 401 {object} map[string]string
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// @Failure 404 {object} map[string]string
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// @Router /api/v1/cart/items/{item_id} [put]
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func UpdateCartItem(c fiber.Ctx) error {
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userID, ok := c.Locals("user_id").(uint)
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if !ok || userID == 0 {
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return c.Status(http.StatusUnauthorized).JSON(fiber.Map{"error": "unauthorized"})
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}
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itemID, err := strconv.ParseUint(c.Params("item_id"), 10, 32)
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if err != nil {
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return c.Status(http.StatusBadRequest).JSON(fiber.Map{"error": "invalid item id"})
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}
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var input UpdateCartItemRequest
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if err := c.Bind().Body(&input); err != nil {
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return c.Status(http.StatusBadRequest).JSON(fiber.Map{"error": "invalid payload"})
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}
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if err := validate.Struct(input); err != nil {
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return c.Status(http.StatusBadRequest).JSON(fiber.Map{"error": err.Error()})
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}
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cart, err := getOrCreateCart(userID)
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if err != nil {
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return c.Status(http.StatusInternalServerError).JSON(fiber.Map{"error": "could not load cart"})
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}
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var cartItem models.CartItem
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if err := database.DB.Where("id = ? AND cart_id = ?", itemID, cart.ID).First(&cartItem).Error; err != nil {
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return c.Status(http.StatusNotFound).JSON(fiber.Map{"error": "item not found in your cart"})
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}
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cartItem.Quantity = input.Quantity
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database.DB.Save(&cartItem)
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// Return updated cart
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cart, _ = getOrCreateCart(userID)
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return c.JSON(cart)
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}
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// RemoveFromCart godoc
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// @Summary Remove item from cart
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// @Tags Cart
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// @Produce json
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// @Security BearerAuth
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// @Param item_id path int true "Cart Item ID"
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// @Success 200 {object} models.CartDoc
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// @Failure 400 {object} map[string]string
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// @Failure 401 {object} map[string]string
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// @Failure 404 {object} map[string]string
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// @Router /api/v1/cart/items/{item_id} [delete]
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func RemoveFromCart(c fiber.Ctx) error {
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userID, ok := c.Locals("user_id").(uint)
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if !ok || userID == 0 {
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return c.Status(http.StatusUnauthorized).JSON(fiber.Map{"error": "unauthorized"})
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}
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itemID, err := strconv.ParseUint(c.Params("item_id"), 10, 32)
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if err != nil {
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return c.Status(http.StatusBadRequest).JSON(fiber.Map{"error": "invalid item id"})
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}
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cart, err := getOrCreateCart(userID)
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if err != nil {
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return c.Status(http.StatusInternalServerError).JSON(fiber.Map{"error": "could not load cart"})
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}
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var cartItem models.CartItem
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if err := database.DB.Where("id = ? AND cart_id = ?", itemID, cart.ID).First(&cartItem).Error; err != nil {
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return c.Status(http.StatusNotFound).JSON(fiber.Map{"error": "item not found in your cart"})
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}
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database.DB.Delete(&cartItem)
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// Return updated cart
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cart, _ = getOrCreateCart(userID)
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return c.JSON(cart)
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}
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// ClearCart godoc
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// @Summary Clear the entire cart
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// @Tags Cart
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// @Produce json
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// @Security BearerAuth
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// @Success 200 {object} models.CartDoc
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// @Failure 401 {object} map[string]string
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// @Router /api/v1/cart [delete]
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func ClearCart(c fiber.Ctx) error {
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userID, ok := c.Locals("user_id").(uint)
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if !ok || userID == 0 {
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return c.Status(http.StatusUnauthorized).JSON(fiber.Map{"error": "unauthorized"})
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}
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cart, err := getOrCreateCart(userID)
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if err != nil {
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return c.Status(http.StatusInternalServerError).JSON(fiber.Map{"error": "could not load cart"})
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}
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// Delete all items for this cart
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database.DB.Where("cart_id = ?", cart.ID).Delete(&models.CartItem{})
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// Return updated empty cart
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cart, _ = getOrCreateCart(userID)
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return c.JSON(cart)
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}
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