// This file attaches all functionality to Node

// that would otherwise require circular dependencies.

import { fromValue } from './collection';

import Node from './node-internal';

import Namespace from './namespace';

import { isCollection, isLiteral } from './utils/terms';

/**

* Creates an RDF Node from a native javascript value.

* RDF Nodes are returned unchanged, undefined returned as itself.

* @method fromValue

* @static

* @param value {Node|Date|String|Number|Boolean|Undefined}

* @return {Node|Collection}

*/

Node.fromValue = fromValue;

export default Node;

const ns = {

xsd: Namespace('http://www.w3.org/2001/XMLSchema#')

};

/**

* Gets the javascript object equivalent to a node

* @param term The RDF node

*/

Node.toJS = function (term) {

if (isCollection(term)) {

return term.elements.map(Node.toJS); // Array node (not standard RDFJS)

}

if (!isLiteral(term)) return term;

if (term.datatype.equals(ns.xsd('boolean'))) {

return term.value === '1' || term.value === 'true';

}

if (term.datatype.equals(ns.xsd('dateTime')) || term.datatype.equals(ns.xsd('date'))) {

return new Date(term.value);

}

if (term.datatype.equals(ns.xsd('integer')) || term.datatype.equals(ns.xsd('float')) || term.datatype.equals(ns.xsd('decimal'))) {

return Number(term.value);

}

return term.value;

};