package util

import (
	"regexp"
	"strings"
)

var (
	pgArrayReg = regexp.MustCompile(`(((?P<value>(([^",\\{}\s(NULL)])+|"([^"\\]|\\"|\\\\)*")))(,)?)`)
	pgValueIdx int
)

func init() {
	for i, subexp := range pgArrayReg.SubexpNames() {
		if subexp == "value" {
			pgValueIdx = i
			break
		}
	}
}

func PGArray(array []byte) []string {
	var results []string
	matches := pgArrayReg.FindAllStringSubmatch(string(array), -1)
	for _, match := range matches {
		s := match[pgValueIdx]
		s = strings.Trim(s, "\"")
		results = append(results, s)
	}
	return results
}