81 lines
1.4 KiB
JavaScript
81 lines
1.4 KiB
JavaScript
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/**
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* @typedef {import('./types.js').Options} Options
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* @typedef {import('./types.js').State} State
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*/
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const own = {}.hasOwnProperty
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/**
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* @param {State} base
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* @param {Options} extension
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* @returns {State}
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*/
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export function configure(base, extension) {
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let index = -1
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/** @type {keyof Options} */
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let key
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// First do subextensions.
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if (extension.extensions) {
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while (++index < extension.extensions.length) {
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configure(base, extension.extensions[index])
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}
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}
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for (key in extension) {
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if (own.call(extension, key)) {
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switch (key) {
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case 'extensions': {
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// Empty.
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break
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}
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/* c8 ignore next 4 */
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case 'unsafe': {
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list(base[key], extension[key])
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break
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}
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case 'join': {
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list(base[key], extension[key])
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break
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}
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case 'handlers': {
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map(base[key], extension[key])
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break
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}
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default: {
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// @ts-expect-error: matches.
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base.options[key] = extension[key]
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}
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}
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}
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}
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return base
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}
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/**
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* @template T
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* @param {Array<T>} left
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* @param {Array<T> | null | undefined} right
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*/
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function list(left, right) {
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if (right) {
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left.push(...right)
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}
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}
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/**
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* @template T
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* @param {Record<string, T>} left
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* @param {Record<string, T> | null | undefined} right
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*/
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function map(left, right) {
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if (right) {
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Object.assign(left, right)
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}
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}
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