76 lines
1.5 KiB
JavaScript
76 lines
1.5 KiB
JavaScript
'use strict';
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var isArray = Array.isArray || function (obj) {
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return Object.prototype.toString.call(obj) === '[object Array]';
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};
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var isDate = function (obj) {
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return Object.prototype.toString.call(obj) === '[object Date]';
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};
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var isRegex = function (obj) {
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return Object.prototype.toString.call(obj) === '[object RegExp]';
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};
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var has = Object.prototype.hasOwnProperty;
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var objectKeys = Object.keys || function (obj) {
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var keys = [];
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for (var key in obj) {
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if (has.call(obj, key)) {
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keys.push(key);
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}
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}
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return keys;
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};
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function dashCase(str) {
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return str.replace(/[A-Z](?:(?=[^A-Z])|[A-Z]*(?=[A-Z][^A-Z]|$))/g, function (s, i) {
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return (i > 0 ? '-' : '') + s.toLowerCase();
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});
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}
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function map(xs, f) {
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if (xs.map) {
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return xs.map(f);
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}
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var res = [];
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for (var i = 0; i < xs.length; i++) {
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res.push(f(xs[i], i));
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}
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return res;
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}
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function reduce(xs, f, acc) {
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if (xs.reduce) {
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return xs.reduce(f, acc);
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}
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for (var i = 0; i < xs.length; i++) {
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acc = f(acc, xs[i], i);
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}
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return acc;
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}
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function walk(obj) {
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if (!obj || typeof obj !== 'object') {
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return obj;
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}
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if (isDate(obj) || isRegex(obj)) {
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return obj;
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}
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if (isArray(obj)) {
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return map(obj, walk);
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}
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return reduce(objectKeys(obj), function (acc, key) {
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var camel = dashCase(key);
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acc[camel] = walk(obj[key]);
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return acc;
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}, {});
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}
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module.exports = function (obj) {
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if (typeof obj === 'string') {
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return dashCase(obj);
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}
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return walk(obj);
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};
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