package adapter

// RawExpr interface represents values that can bypass SQL filters. This is an
// exported interface but it's rarely used directly, you may want to use the
// `db.Raw()` function instead.
type RawExpr struct {
	value string
	args  *[]interface{}
}

func (r *RawExpr) Arguments() []interface{} {
	if r.args != nil {
		return *r.args
	}
	return nil
}

func (r RawExpr) Raw() string {
	return r.value
}

func (r RawExpr) String() string {
	return r.Raw()
}

// Expressions returns a logical expressio.n
func (r *RawExpr) Expressions() []LogicalExpr {
	return []LogicalExpr{r}
}

// Operator returns the default compound operator.
func (r RawExpr) Operator() LogicalOperator {
	return LogicalOperatorNone
}

// Empty return false if this struct has no value.
func (r *RawExpr) Empty() bool {
	return r.value == ""
}

func NewRawExpr(value string, args []interface{}) *RawExpr {
	r := &RawExpr{value: value, args: nil}
	if len(args) > 0 {
		r.args = &args
	}
	return r
}

var _ = LogicalExpr(&RawExpr{})