package transform

import (
	"sync"
)

var absURLInit sync.Once
var ar *absURLReplacer

// for performance reasons, we reuse the first baseURL given
func initAbsURLReplacer(baseURL string) {
	absURLInit.Do(func() {
		ar = newAbsURLReplacer(baseURL)
	})
}

func AbsURL(absURL string) (trs []link, err error) {
	initAbsURLReplacer(absURL)

	trs = append(trs, func(rw contentRewriter) {
		ar.replaceInHTML(rw)
	})
	return
}

func AbsURLInXML(absURL string) (trs []link, err error) {
	initAbsURLReplacer(absURL)

	trs = append(trs, func(rw contentRewriter) {
		ar.replaceInXML(rw)
	})
	return
}