fix #1 Cart is empty

controllers/cartItemController.go

@@ -7,6 +7,7 @@ import (
 	"fmt"
 	"net/http"
 	"strconv"
+	"strings"
 
 	"github.com/gin-gonic/gin"
 	"gorm.io/gorm"
@@ -36,6 +37,22 @@ func NewCartItemController() CartItemController {
 	return &cartItemController{}
 }
 
+// getSetCookieValue retrieves the value of a cookie from the Set-Cookie header
+func getSetCookieValue(c *gin.Context, cookieName string) string {
+	// Check the Set-Cookie headers
+	cookies := c.Writer.Header()["Set-Cookie"]
+	for _, cookie := range cookies {
+		if strings.HasPrefix(cookie, cookieName+"=") {
+			// Extract the cookie value
+			parts := strings.SplitN(cookie, ";", 2)
+			if len(parts) > 0 {
+				return strings.TrimPrefix(parts[0], cookieName+"=")
+			}
+		}
+	}
+	return "" // Return empty string if cookie is not found
+}
+
 func generateSessionId(length int) string {
 	bytes := make([]byte, length) // 16 bytes = 128 bits
 	_, err := rand.Read(bytes)
@@ -49,6 +66,13 @@ func GetSessionId(ctx *gin.Context) string {
 	sessionId, err := ctx.Cookie("session_id")
 
 	if err != nil {
+		//we need to check if we already set cookie in the response so that we dont do this multiple times
+		responseCookie := getSetCookieValue(ctx, "session_id")
+
+		if len(responseCookie) != 0 {
+			return responseCookie
+		}
+
 		sessionId = generateSessionId(16)
 		ctx.SetCookie("session_id", sessionId, 3600, "/", "", false, true)
 	}
@@ -170,7 +194,7 @@ func (rc *cartItemController) NewOrderFromForm(ctx *gin.Context) (models.Order,
 		return models.Order{}, err
 	}
 
-	cartItem := models.Order{
+	order := models.Order{
 		SessionId:  sessionId,
 		Status:     status,
 		Token:      token,
@@ -186,7 +210,7 @@ func (rc *cartItemController) NewOrderFromForm(ctx *gin.Context) (models.Order,
 		CartItems:  cartItems,
 	}
 
-	return cartItem, nil
+	return order, nil
 }
 
 func (rc *cartItemController) Create(c *gin.Context) {
@@ -360,21 +384,31 @@ func (rc *cartItemController) CheckoutHandler(c *gin.Context) {
 	existingOrder, err := repositories.Orders.GetBySession(order.SessionId)
 
 	if errors.Is(err, gorm.ErrRecordNotFound) {
-		_, err = repositories.Orders.Create(order)
+		fmt.Println("Creating Order")
+		createdOrder, err := repositories.Orders.Create(order)
+
+		if err != nil {
+			data := CreateSessionData(c, gin.H{
+				"error":   err,
+				"success": "",
+			})
+
+			c.HTML(http.StatusOK, "error.html", data)
+			return
+		}
+
+		for _, cartItem := range order.CartItems {
+			cartItem.OrderID = createdOrder.ID
+			repositories.CartItems.Update(cartItem)
+		}
 	} else if err == nil {
+		fmt.Println("Updating Order")
 		order.ID = existingOrder.ID
 		order.CreatedAt = existingOrder.CreatedAt
-		repositories.Orders.Update(order)
-	}
-
-	if err != nil {
-		data := CreateSessionData(c, gin.H{
-			"error":   err,
-			"success": "",
-		})
-
-		c.HTML(http.StatusOK, "cart.html", data)
-		return
+		_, err := repositories.Orders.Update(order)
+		if err != nil {
+			fmt.Println(err)
+		}
 	}
 
 	shipping, err := models.GetShippingMethod(order.Shipping)
@@ -384,7 +418,7 @@ func (rc *cartItemController) CheckoutHandler(c *gin.Context) {
 			"success": "",
 		})
 
-		c.HTML(http.StatusOK, "cart.html", data)
+		c.HTML(http.StatusOK, "error.html", data)
 		return
 	}
 
@@ -395,7 +429,7 @@ func (rc *cartItemController) CheckoutHandler(c *gin.Context) {
 			"success": "",
 		})
 
-		c.HTML(http.StatusOK, "cart.html", data)
+		c.HTML(http.StatusOK, "error.html", data)
 		return
 	}