Order modelling

order.go

// Order represents a coffee order
type Order struct {
	ID           uuid.UUID `json:"id" db:"id"`
	CreatedAt    time.Time `json:"created_at" db:"created_at"`
	Items        Items     `json:"items" db:"items"`
	CustomerName string    `json:"customer_name" db:"customer_name"`
}

// Items are a collection of order items
type Items []*Item

// Item represents the order item
type Item struct {
	Type string `json:"type"`
	Size string `json:"size" db:"size"`
}

// NewOrder creates a new instance of Order
func NewOrder(id uuid.UUID, customerName string) *Order {
	return &Order{
		ID:           id,
		CreatedAt:    time.Now(),
		CustomerName: customerName,
	}
}

// NextOrderID generates the next order ID
func NextOrderID() uuid.UUID {
	return uuid.NewV4()
}

// AddItems adds a list of items to the order
func (o *Order) AddItems(items Items) *Order {
	o.Items = items

	return o
}