package util

import (
	"strings"
	"unicode"
)

func CamelToSnake(str string) string {
	var snake strings.Builder
	isPrevUpper := true
	for _, c := range str {
		if unicode.IsUpper(c) && !isPrevUpper {
			snake.WriteString("_" + string(unicode.ToUpper(c)))
			isPrevUpper = true
		} else {
			snake.WriteString(string(unicode.ToUpper(c)))
			isPrevUpper = unicode.IsUpper(c)
		}
	}
	return snake.String()
}