45 lines
997 B
JavaScript
45 lines
997 B
JavaScript
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const {toString} = Object.prototype;
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const isError = value => toString.call(value) === '[object Error]';
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export class PresentableError extends Error {
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constructor(message, {cause} = {}) {
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super();
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if (message instanceof PresentableError) {
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return message; // eslint-disable-line no-constructor-return
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}
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if (typeof message !== 'string') {
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throw new TypeError('Message required.');
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}
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this.name = 'PresentableError';
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this.message = message;
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this.cause = cause;
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}
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get isPresentable() {
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return true;
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}
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}
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export function isPresentableError(value) {
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return value && isError(value) && value.isPresentable === true;
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}
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export function makePresentableError(error) {
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if (!isError(error)) {
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throw new TypeError('The value is not an error.');
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}
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if (isPresentableError(error)) {
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return;
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}
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if (!Object.isExtensible(error)) {
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throw new Error('The error is non-extensible and cannot be edited.');
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}
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Object.defineProperty(error, 'isPresentable', {value: true});
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}
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