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