Add user auth, cart, checkout and personal account for guests and registered users

internal/models/user.go

@@ -0,0 +1,50 @@
+package models
+
+import "time"
+
+type User struct {
+	ID        int
+	Email     string
+	Name      string
+	Phone     string
+	Address   string
+	CreatedAt time.Time
+}
+
+type Cart struct {
+	ID        int
+	UserID    *int
+	SessionKey string
+	Items     []CartItem
+	UpdatedAt time.Time
+}
+
+type CartItem struct {
+	ID        int
+	CartID    int
+	ProductID int
+	Quantity  int
+	Product   Product
+}
+
+type Order struct {
+	ID         int
+	UserID     *int
+	GuestName  string
+	GuestEmail string
+	GuestPhone string
+	Address    string
+	Total      float64
+	Status     string
+	CreatedAt  time.Time
+	Items      []OrderItem
+}
+
+type OrderItem struct {
+	ID          int
+	OrderID     int
+	ProductID   int
+	ProductName string
+	Price       float64
+	Quantity    int
+}