package database

import (
	"database/sql"

	"github.com/jmoiron/sqlx"
)

type Row struct {
	*sqlx.Row
	err error
}

// Scan is a fixed implementation of sql.Row.Scan, which does not discard the
// underlying error from the internal rows object if it exists.
func (r *Row) Scan(dest ...interface{}) error {
	if r.err != nil {
		return r.err
	}

	return r.Row.Scan(dest...)
}

// Columns returns the underlying sql.Rows.Columns(), or the deferred error usually
// returned by Row.Scan().
func (r *Row) Columns() ([]string, error) {
	if r.err != nil {
		return []string{}, r.err
	}

	return r.Row.Columns()
}

// ColumnTypes returns the underlying sql.Rows.ColumnTypes(), or the deferred error.
func (r *Row) ColumnTypes() ([]*sql.ColumnType, error) {
	if r.err != nil {
		return []*sql.ColumnType{}, r.err
	}

	return r.Row.ColumnTypes()
}

// Err returns the error encountered while scanning.
func (r *Row) Err() error {
	return r.err
}