“use strict”; const xnv = require(“xml-name-validator”); const DOMException = require(“../../web-idl/DOMException”);

// dom.spec.whatwg.org/#validate

exports.name = function (name) {

const result = xnv.name(name);
if (!result.success) {
  throw new DOMException(DOMException.INVALID_CHARACTER_ERR,
    "\"" + name + "\" did not match the Name production: " + result.error);
}

};

exports.qname = function (qname) {

exports.name(qname);

const result = xnv.qname(qname);
if (!result.success) {
  throw new DOMException(DOMException.NAMESPACE_ERR,
    "\"" + qname + "\" did not match the QName production: " + result.error);
}

};

exports.validateAndExtract = function (namespace, qualifiedName) {

if (namespace === "") {
  namespace = null;
}

exports.qname(qualifiedName);

let prefix = null;
let localName = qualifiedName;

const colonIndex = qualifiedName.indexOf(":");
if (colonIndex !== -1) {
  prefix = qualifiedName.substring(0, colonIndex);
  localName = qualifiedName.substring(colonIndex + 1);
}

if (prefix !== null && namespace === null) {
  throw new DOMException(DOMException.NAMESPACE_ERR,
    "A namespace was given but a prefix was also extracted from the qualifiedName");
}

if (prefix === "xml" && namespace !== "http://www.w3.org/XML/1998/namespace") {
  throw new DOMException(DOMException.NAMESPACE_ERR,
    "A prefix of \"xml\" was given but the namespace was not the XML namespace");
}

if ((qualifiedName === "xmlns" || prefix === "xmlns") && namespace !== "http://www.w3.org/2000/xmlns/") {
  throw new DOMException(DOMException.NAMESPACE_ERR,
    "A prefix or qualifiedName of \"xmlns\" was given but the namespace was not the XMLNS namespace");
}

if (namespace === "http://www.w3.org/2000/xmlns/" && qualifiedName !== "xmlns" && prefix !== "xmlns") {
  throw new DOMException(DOMException.NAMESPACE_ERR,
    "The XMLNS namespace was given but neither the prefix nor qualifiedName was \"xmlns\"");
}

return { namespace, prefix, localName };

};