boundary/internal/host/options.go

package host

// GetOpts - iterate the inbound Options and return a struct
func GetOpts(opt ...Option) (options, error) {
	opts := getDefaultOptions()
	for _, o := range opt {
		if err := o(&opts); err != nil {
			return opts, err
		}
	}
	return opts, nil
}

// Option - how Options are passed as arguments.
type Option func(*options) error

// options = how options are represented
type options struct {
	WithLimit             int
	WithOrderByCreateTime bool
	Ascending             bool
}

func getDefaultOptions() options {
	return options{}
}

// WithLimit provides an option to provide a limit. Intentionally allowing
// negative integers. If WithLimit < 0, then unlimited results are
// returned. If WithLimit == 0, then default limits are used for results.
func WithLimit(l int) Option {
	return func(o *options) error {
		o.WithLimit = l
		return nil
	}
}

// WithOrderByCreateTime provides an option to specify ordering by the
// CreateTime field.
func WithOrderByCreateTime(ascending bool) Option {
	return func(o *options) error {
		o.WithOrderByCreateTime = true
		o.Ascending = ascending
		return nil
	}
}