| 1 | /** @license MIT License (c) copyright 2010-2014 original author or authors */
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| 2 | /** @author Brian Cavalier */
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| 3 | /** @author John Hann */
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| 4 |
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| 5 | (function(define) { 'use strict';
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| 6 | define(function() {
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| 7 |
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| 8 | return {
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| 9 | formatError: formatError,
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| 10 | formatObject: formatObject,
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| 11 | tryStringify: tryStringify
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| 12 | };
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| 13 |
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| 14 | /**
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| 15 | * Format an error into a string. If e is an Error and has a stack property,
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| 16 | * it's returned. Otherwise, e is formatted using formatObject, with a
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| 17 | * warning added about e not being a proper Error.
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| 18 | * @param {*} e
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| 19 | * @returns {String} formatted string, suitable for output to developers
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| 20 | */
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| 21 | function formatError(e) {
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| 22 | var s = typeof e === 'object' && e !== null && (e.stack || e.message) ? e.stack || e.message : formatObject(e);
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| 23 | return e instanceof Error ? s : s + ' (WARNING: non-Error used)';
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| 24 | }
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| 25 |
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| 26 | /**
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| 27 | * Format an object, detecting "plain" objects and running them through
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| 28 | * JSON.stringify if possible.
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| 29 | * @param {Object} o
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| 30 | * @returns {string}
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| 31 | */
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| 32 | function formatObject(o) {
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| 33 | var s = String(o);
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| 34 | if(s === '[object Object]' && typeof JSON !== 'undefined') {
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| 35 | s = tryStringify(o, s);
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| 36 | }
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| 37 | return s;
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| 38 | }
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| 39 |
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| 40 | /**
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| 41 | * Try to return the result of JSON.stringify(x). If that fails, return
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| 42 | * defaultValue
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| 43 | * @param {*} x
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| 44 | * @param {*} defaultValue
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| 45 | * @returns {String|*} JSON.stringify(x) or defaultValue
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| 46 | */
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| 47 | function tryStringify(x, defaultValue) {
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| 48 | try {
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| 49 | return JSON.stringify(x);
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| 50 | } catch(e) {
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| 51 | return defaultValue;
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| 52 | }
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| 53 | }
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| 54 |
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| 55 | });
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| 56 | }(typeof define === 'function' && define.amd ? define : function(factory) { module.exports = factory(); }));
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