1'use strict';
2const indentString = require('indent-string');
3const cleanStack = require('clean-stack');
4
5const cleanInternalStack = stack => stack.replace(/\s+at .*aggregate-error\/index.js:\d+:\d+\)?/g, '');
6
7class AggregateError extends Error {
8	constructor(errors) {
9		if (!Array.isArray(errors)) {
10			throw new TypeError(`Expected input to be an Array, got ${typeof errors}`);
11		}
12
13		errors = [...errors].map(error => {
14			if (error instanceof Error) {
15				return error;
16			}
17
18			if (error !== null && typeof error === 'object') {
19				// Handle plain error objects with message property and/or possibly other metadata
20				return Object.assign(new Error(error.message), error);
21			}
22
23			return new Error(error);
24		});
25
26		let message = errors
27			.map(error => {
28				// The `stack` property is not standardized, so we can't assume it exists
29				return typeof error.stack === 'string' ? cleanInternalStack(cleanStack(error.stack)) : String(error);
30			})
31			.join('\n');
32		message = '\n' + indentString(message, 4);
33		super(message);
34
35		this.name = 'AggregateError';
36
37		Object.defineProperty(this, '_errors', {value: errors});
38	}
39
40	* [Symbol.iterator]() {
41		for (const error of this._errors) {
42			yield error;
43		}
44	}
45}
46
47module.exports = AggregateError;
48