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/*
    MIT License http://www.opensource.org/licenses/mit-license.php
    Author Tobias Koppers @sokra
*/
"use strict";
const PrefetchDependency = require("./dependencies/PrefetchDependency");
/** @typedef {import("./Compiler")} Compiler */
class PrefetchPlugin {
    constructor(context, request) {
        if (request) {
            this.context = context;
            this.request = request;
        } else {
            this.context = null;
            this.request = context;
        }
    }
    /**
     * Apply the plugin
     * @param {Compiler} compiler the compiler instance
     * @returns {void}
     */
    apply(compiler) {
        compiler.hooks.compilation.tap(
            "PrefetchPlugin",
            (compilation, { normalModuleFactory }) => {
                compilation.dependencyFactories.set(
                    PrefetchDependency,
                    normalModuleFactory
                );
            }
        );
        compiler.hooks.make.tapAsync("PrefetchPlugin", (compilation, callback) => {
            compilation.addModuleChain(
                this.context || compiler.context,
                new PrefetchDependency(this.request),
                err => {
                    callback(err);
                }
            );
        });
    }
}
module.exports = PrefetchPlugin;
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