package main

import (
	"errors"
	"strings"
)

// ParseVars returns parsed and validated slice of strings with
// variables names that will be used for monitoring.
func ParseVars(vars string) ([]VarName, error) {
	if vars == "" {
		return nil, errors.New("no vars specified")
	}

	ss := strings.FieldsFunc(vars, func(r rune) bool { return r == ',' })
	var ret []VarName
	for _, s := range ss {
		ret = append(ret, VarName(s))
	}
	return ret, nil
}