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Filename : ContainerReferencePlugin.js
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/*
	MIT License http://www.opensource.org/licenses/mit-license.php
	Author Tobias Koppers @sokra and Zackary Jackson @ScriptedAlchemy
*/

"use strict";

const ExternalsPlugin = require("../ExternalsPlugin");
const RuntimeGlobals = require("../RuntimeGlobals");
const createSchemaValidation = require("../util/create-schema-validation");
const FallbackDependency = require("./FallbackDependency");
const FallbackItemDependency = require("./FallbackItemDependency");
const FallbackModuleFactory = require("./FallbackModuleFactory");
const RemoteModule = require("./RemoteModule");
const RemoteRuntimeModule = require("./RemoteRuntimeModule");
const RemoteToExternalDependency = require("./RemoteToExternalDependency");
const { parseOptions } = require("./options");

/** @typedef {import("../../declarations/plugins/container/ContainerReferencePlugin").ContainerReferencePluginOptions} ContainerReferencePluginOptions */
/** @typedef {import("../../declarations/plugins/container/ContainerReferencePlugin").RemotesConfig} RemotesConfig */
/** @typedef {import("../Compiler")} Compiler */

const validate = createSchemaValidation(
	require("../../schemas/plugins/container/ContainerReferencePlugin.check.js"),
	() =>
		require("../../schemas/plugins/container/ContainerReferencePlugin.json"),
	{
		name: "Container Reference Plugin",
		baseDataPath: "options"
	}
);

const slashCode = "/".charCodeAt(0);
const PLUGIN_NAME = "ContainerReferencePlugin";

class ContainerReferencePlugin {
	/**
	 * @param {ContainerReferencePluginOptions} options options
	 */
	constructor(options) {
		validate(options);

		this._remoteType = options.remoteType;
		this._remotes = parseOptions(
			options.remotes,
			item => ({
				external: Array.isArray(item) ? item : [item],
				shareScope: options.shareScope || "default"
			}),
			item => ({
				external: Array.isArray(item.external)
					? item.external
					: [item.external],
				shareScope: item.shareScope || options.shareScope || "default"
			})
		);
	}

	/**
	 * Apply the plugin
	 * @param {Compiler} compiler the compiler instance
	 * @returns {void}
	 */
	apply(compiler) {
		const { _remotes: remotes, _remoteType: remoteType } = this;

		/** @type {Record<string, string>} */
		const remoteExternals = {};
		for (const [key, config] of remotes) {
			let i = 0;
			for (const external of config.external) {
				if (external.startsWith("internal ")) continue;
				remoteExternals[
					`webpack/container/reference/${key}${i ? `/fallback-${i}` : ""}`
				] = external;
				i++;
			}
		}

		new ExternalsPlugin(remoteType, remoteExternals).apply(compiler);

		compiler.hooks.compilation.tap(
			PLUGIN_NAME,
			(compilation, { normalModuleFactory }) => {
				compilation.dependencyFactories.set(
					RemoteToExternalDependency,
					normalModuleFactory
				);

				compilation.dependencyFactories.set(
					FallbackItemDependency,
					normalModuleFactory
				);

				compilation.dependencyFactories.set(
					FallbackDependency,
					new FallbackModuleFactory()
				);

				normalModuleFactory.hooks.factorize.tap(PLUGIN_NAME, data => {
					if (!data.request.includes("!")) {
						for (const [key, config] of remotes) {
							if (
								data.request.startsWith(`${key}`) &&
								(data.request.length === key.length ||
									data.request.charCodeAt(key.length) === slashCode)
							) {
								return new RemoteModule(
									data.request,
									config.external.map((external, i) =>
										external.startsWith("internal ")
											? external.slice(9)
											: `webpack/container/reference/${key}${
													i ? `/fallback-${i}` : ""
												}`
									),
									`.${data.request.slice(key.length)}`,
									config.shareScope
								);
							}
						}
					}
				});

				compilation.hooks.runtimeRequirementInTree
					.for(RuntimeGlobals.ensureChunkHandlers)
					.tap(PLUGIN_NAME, (chunk, set) => {
						set.add(RuntimeGlobals.module);
						set.add(RuntimeGlobals.moduleFactoriesAddOnly);
						set.add(RuntimeGlobals.hasOwnProperty);
						set.add(RuntimeGlobals.initializeSharing);
						set.add(RuntimeGlobals.shareScopeMap);
						compilation.addRuntimeModule(chunk, new RemoteRuntimeModule());
					});
			}
		);
	}
}

module.exports = ContainerReferencePlugin;