type Booking struct {
ID int Date time.Time `json:"date" db:"date"`
Customer string `json:"customer" db:"customer"`
Class string `json:"class" db:"class"`
}
Booking represents a customer's booking for a certain class
type Class struct {
ID string Name string `json:"name" db:"name"`
StartDate time.Time `json:"start_date" db:"start_date"`
EndDate time.Time `json:"end_date" db:"end_date"`
Capacity int `json:"capacity" db:"capacity"`
}