60 lines
1.6 KiB
JavaScript
60 lines
1.6 KiB
JavaScript
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/*
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MIT License http://www.opensource.org/licenses/mit-license.php
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Author Tobias Koppers @sokra
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*/
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"use strict";
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/** @typedef {import("./Resolver")} Resolver */
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/** @typedef {import("./Resolver").ResolveRequest} ResolveRequest */
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/** @typedef {import("./Resolver").ResolveStepHook} ResolveStepHook */
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module.exports = class ConditionalPlugin {
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/**
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* @param {string | ResolveStepHook} source source
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* @param {Partial<ResolveRequest>} test compare object
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* @param {string | null} message log message
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* @param {boolean} allowAlternatives when false, do not continue with the current step when "test" matches
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* @param {string | ResolveStepHook} target target
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*/
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constructor(source, test, message, allowAlternatives, target) {
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this.source = source;
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this.test = test;
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this.message = message;
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this.allowAlternatives = allowAlternatives;
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this.target = target;
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}
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/**
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* @param {Resolver} resolver the resolver
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* @returns {void}
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*/
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apply(resolver) {
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const target = resolver.ensureHook(this.target);
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const { test, message, allowAlternatives } = this;
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const keys = Object.keys(test);
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resolver
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.getHook(this.source)
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.tapAsync("ConditionalPlugin", (request, resolveContext, callback) => {
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for (const prop of keys) {
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if (request[prop] !== test[prop]) return callback();
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}
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resolver.doResolve(
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target,
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request,
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message,
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resolveContext,
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allowAlternatives
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? callback
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: (err, result) => {
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if (err) return callback(err);
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// Don't allow other alternatives
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if (result === undefined) return callback(null, null);
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callback(null, result);
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}
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);
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});
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}
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};
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