// GetOrderById - Find purchase order by ID
func (c *StoreApiController) GetOrderById(w http.ResponseWriter, r *http.Request) {
	orderIdParam, err := parseNumericParameter[int64](
		chi.URLParam(r, "orderId"),
		WithRequire[int64](parseInt64),
		WithMinimum[int64](1),
		WithMaximum[int64](5),
	)
	if err != nil {
		c.errorHandler(w, r, &ParsingError{Err: err}, nil)
		return
	}

...
}

type Number interface {
	constraints.Integer | constraints.Float
}

type ParseString[T Number | string | bool] func(v string) (T, error)

// parseFloat64 parses a string parameter to an float64.
func parseFloat64(param string) (float64, error) {
	return strconv.ParseFloat(param, 64)
}

// parseFloat32 parses a string parameter to an float32.
func parseFloat32(param string) (float32, error) {
	v, err := strconv.ParseFloat(param, 32)
	return float32(v), err
}

// parseInt64 parses a string parameter to an int64.
func parseInt64(param string) (int64, error) {
	return strconv.ParseInt(param, 10, 64)
}

// parseInt32 parses a string parameter to an int32.
func parseInt32(param string) (int32, error) {
	val, err := strconv.ParseInt(param, 10, 32)
	return int32(val), err
}

// parseBool parses a string parameter to an bool.
func parseBool(param string) (bool, error) {
	return strconv.ParseBool(param)
}

type Operation[T Number | string | bool] func(actual string) (T, bool, error)

func WithRequire[T Number | string | bool](parse ParseString[T]) Operation[T] {
	var empty T
	return func(actual string) (T, bool, error) {
		if actual == "" {
			return empty, false, errors.New(errMsgRequiredMissing)
		}

		v, err := parse(actual)
		return v, false, err
	}
}

func WithDefaultOrParse[T Number | string | bool](def T, parse ParseString[T]) Operation[T] {
	return func(actual string) (T, bool, error) {
		if actual == "" {
			return def, true, nil
		}

		v, err := parse(actual)
		return v, false, err
	}
}

func WithParse[T Number | string | bool](parse ParseString[T]) Operation[T] {
	return func(actual string) (T, bool, error) {
		v, err := parse(actual)
		return v, false, err
	}
}

type Constraint[T Number | string | bool] func(actual T) error

func WithMinimum[T Number](expected T) Constraint[T] {
	return func(actual T) error {
		if actual < expected {
			return errors.New(errMsgMinValueConstraint)
		}

		return nil
	}
}

func WithMaximum[T Number](expected T) Constraint[T] {
	return func(actual T) error {
		if actual > expected {
			return errors.New(errMsgMaxValueConstraint)
		}

		return nil
	}
}

// parseNumericParameter parses a numeric parameter to an its respective type.
func parseNumericParameter[T Number](param string, fn Operation[T], check ...Constraint[T]) (T, error) {
	v, ok, err := fn(param)
	if err != nil {
		return 0, err
	}

	if !ok {
		for _, o := range check {
			if err := o(v); err != nil {
				return 0, err
			}
		}
	}

	return v, nil
}

// parseBoolParameter parses a string parameter to a bool
func parseBoolParameter(param string, fn Operation[bool]) (bool, error) {
	v, _, err := fn(param)
	return v, err
}