package sqimple

import (
	"regexp"
)

var columnRegexp = regexp.MustCompile("^([^ ]+)( as ([^ ]+))?$")

type Column string

func (c Column) IsValid() bool {
	return columnRegexp.MatchString(string(c))
}

func (c Column) Parse() (string, string, bool) {
	if columnRegexp.MatchString(string(c)) {
		result := columnRegexp.FindAllStringSubmatch(string(c), -1)
		for _, r := range result {
			column, as := r[1], r[3]
			return column, as, true
		}
	}

	return "", "", false
}

func (c Column) String() string {
	return string(c)
}