70 lines
2.0 KiB
JavaScript
70 lines
2.0 KiB
JavaScript
'use strict';
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var isArray = require('core-js/library/fn/array/is-array');
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var objectKeys = require('core-js/library/fn/object/keys');
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var indexOf = require('core-js/library/fn/array/index-of');
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var reduce = require('core-js/library/fn/array/reduce');
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module.exports = function cloneWithWhitelist (astWhiteList) {
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var whitelist = reduce(objectKeys(astWhiteList), function (props, key) {
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var propNames = astWhiteList[key];
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var prepend = (indexOf(propNames, 'type') === -1) ? ['type'] : [];
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props[key] = prepend.concat(propNames);
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return props;
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}, {});
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function cloneNodeOrObject (obj) {
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var props = obj.type ? whitelist[obj.type] : null;
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if (props) {
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return cloneNode(obj, props);
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} else {
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return cloneObject(obj);
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}
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}
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function cloneArray (ary) {
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var i = ary.length, clone = [];
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while (i--) {
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clone[i] = cloneOf(ary[i]);
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}
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return clone;
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}
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function cloneNode (node, props) {
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var i, len, key, clone = {};
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for (i = 0, len = props.length; i < len; i += 1) {
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key = props[i];
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if (node.hasOwnProperty(key)) {
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clone[key] = cloneOf(node[key]);
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}
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}
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return clone;
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}
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function cloneObject (obj) {
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var props = objectKeys(obj);
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var i, len, key, clone = {};
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for (i = 0, len = props.length; i < len; i += 1) {
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key = props[i];
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clone[key] = cloneOf(obj[key]);
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}
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return clone;
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}
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function cloneOf (val) {
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if (typeof val === 'object' && val !== null) {
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if (val instanceof RegExp) {
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return new RegExp(val);
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} else if (isArray(val)) {
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return cloneArray(val);
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} else {
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return cloneNodeOrObject(val);
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}
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} else {
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return val;
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}
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}
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return cloneNodeOrObject;
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};
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