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Packs ECMAScript/CommonJs/AMD modules for the browser. Allows you to split your codebase into multiple bundles, which can be loaded on demand. Supports loaders to preprocess files, i.e. json, jsx, es7, css, less, ... and your custom stuff.
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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);

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} */
		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(
			"ContainerReferencePlugin",
			(compilation, { normalModuleFactory }) => {
				compilation.dependencyFactories.set(
					RemoteToExternalDependency,
					normalModuleFactory
				);

				compilation.dependencyFactories.set(
					FallbackItemDependency,
					normalModuleFactory
				);

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

				normalModuleFactory.hooks.factorize.tap(
					"ContainerReferencePlugin",
					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("ContainerReferencePlugin", (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;