102 lines
2.2 KiB
JavaScript
102 lines
2.2 KiB
JavaScript
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'use strict';
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class NonError extends Error {
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constructor(message) {
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super(NonError._prepareSuperMessage(message));
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Object.defineProperty(this, 'name', {
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value: 'NonError',
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configurable: true,
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writable: true
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});
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if (Error.captureStackTrace) {
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Error.captureStackTrace(this, NonError);
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}
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}
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static _prepareSuperMessage(message) {
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try {
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return JSON.stringify(message);
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} catch (_) {
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return String(message);
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}
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}
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}
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const commonProperties = [
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{property: 'name', enumerable: false},
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{property: 'message', enumerable: false},
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{property: 'stack', enumerable: false},
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{property: 'code', enumerable: true}
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];
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const destroyCircular = ({from, seen, to_, forceEnumerable}) => {
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const to = to_ || (Array.isArray(from) ? [] : {});
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seen.push(from);
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for (const [key, value] of Object.entries(from)) {
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if (typeof value === 'function') {
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continue;
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}
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if (!value || typeof value !== 'object') {
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to[key] = value;
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continue;
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}
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if (!seen.includes(from[key])) {
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to[key] = destroyCircular({from: from[key], seen: seen.slice(), forceEnumerable});
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continue;
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}
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to[key] = '[Circular]';
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}
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for (const {property, enumerable} of commonProperties) {
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if (typeof from[property] === 'string') {
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Object.defineProperty(to, property, {
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value: from[property],
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enumerable: forceEnumerable ? true : enumerable,
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configurable: true,
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writable: true
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});
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}
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}
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return to;
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};
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const serializeError = value => {
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if (typeof value === 'object' && value !== null) {
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return destroyCircular({from: value, seen: [], forceEnumerable: true});
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}
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// People sometimes throw things besides Error objects…
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if (typeof value === 'function') {
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// `JSON.stringify()` discards functions. We do too, unless a function is thrown directly.
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return `[Function: ${(value.name || 'anonymous')}]`;
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}
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return value;
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};
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const deserializeError = value => {
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if (value instanceof Error) {
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return value;
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}
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if (typeof value === 'object' && value !== null && !Array.isArray(value)) {
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const newError = new Error();
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destroyCircular({from: value, seen: [], to_: newError});
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return newError;
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}
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return new NonError(value);
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};
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module.exports = {
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serializeError,
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deserializeError
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};
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