add-generator.ts

import Generator = require("yeoman-generator");

import * as glob from "glob-all";
import * as autoComplete from "inquirer-autocomplete-prompt";
import * as path from "path";

import npmExists from "@webpack-cli/utils/npm-exists";
import { getPackageManager } from "@webpack-cli/utils/package-manager";
import PROP_TYPES from "@webpack-cli/utils/prop-types";
import {
	AutoComplete,
	Confirm,
	IInquirerInput,
	Input,
	List,
} from "@webpack-cli/webpack-scaffold";

import { ISchemaProperties, IWebpackOptions } from "./types";
import entryQuestions from "./utils/entry";

// tslint:disable:no-var-requires
const webpackDevServerSchema = require("webpack-dev-server/lib/options.json");
const webpackSchema = require("./utils/optionsSchema.json");
const PROPS: string[] = Array.from(PROP_TYPES.keys());

/**
 *
 * Replaces the string with a substring at the given index
 * https://gist.github.com/efenacigiray/9367920
 *
 * @param	{String} string - string to be modified
 * @param	{Number} index - index to replace from
 * @param	{String} replace - string to replace starting from index
 *
 * @returns	{String} string - The newly mutated string
 *
 */
function replaceAt(str: string, index: number, replace: string): string {
	return str.substring(0, index) + replace + str.substring(index + 1);
}

/**
 *
 * Checks if the given array has a given property
 *
 * @param	{Array} arr - array to check
 * @param	{String} prop - property to check existence of
 *
 * @returns	{Boolean} hasProp - Boolean indicating if the property
 * is present
 */
const traverseAndGetProperties = (arr: object[], prop: string): boolean => {
	let hasProp = false;
	arr.forEach((p: object): void => {
		if (p[prop]) {
			hasProp = true;
		}
	});
	return hasProp;
};

/**
 *
 * Search config properties
 *
 * @param {Object} answers	Prompt answers object
 * @param {String} input	Input search string
 *
 * @returns {Promise} Returns promise which resolves to filtered props
 *
 */
const searchProps = (answers: object, input: string): Promise<string[]> => {
	input = input || "";
	return Promise.resolve(
		PROPS.filter((prop: string): boolean =>
			prop.toLowerCase().includes(input.toLowerCase()),
		),
	);
};

/**
 *
 * Generator for adding properties
 * @class	AddGenerator
 * @extends	Generator
 * @returns	{Void} After execution, transforms are triggered
 *
 */

export default class AddGenerator extends Generator {
	private dependencies: string[];
	private configuration: {
		config: {
			configName?: string,
			topScope?: string[],
			item?: string;
			webpackOptions?: IWebpackOptions,
		},
	};

	constructor(args, opts) {
		super(args, opts);
		this.dependencies = [];
		this.configuration = {
			config: {
				topScope: ["const webpack = require('webpack')"],
				webpackOptions: {},
			},
		};
		const { registerPrompt } = this.env.adapter.promptModule;
		registerPrompt("autocomplete", autoComplete);
	}

	public prompting() {
		const done: (_?: void) => void | boolean = this.async();
		let action: string;
		const self: this = this;
		const manualOrListInput: (promptAction: string) => IInquirerInput = (promptAction: string) =>
			Input("actionAnswer", `What do you want to add to ${promptAction}?`);
		let inputPrompt: IInquirerInput;

		// first index indicates if it has a deep prop, 2nd indicates what kind of
		const isDeepProp: any[] = [false, false];

		return this.prompt([
			AutoComplete(
				"actionType",
				"What property do you want to add to?",
				{
					pageSize: 7,
					source: searchProps,
					suggestOnly: false,
				},
			),
		])
			.then((actionTypeAnswer: {
				actionType: string,
			}) => {
				// Set initial prop, like devtool
				this.configuration.config.webpackOptions[
					actionTypeAnswer.actionType
				] = null;
				// update the action variable, we're using it later
				action = actionTypeAnswer.actionType;
			})
			.then((_: void) => {
				if (action === "entry") {
					return this.prompt([
						Confirm("entryType", "Will your application have multiple bundles?"),
					])
						.then((entryTypeAnswer: {
							entryType: boolean,
						}) => {
							// Ask different questions for entry points
							return entryQuestions(self, entryTypeAnswer);
						})
						.then((entryOptions: {
							entryType: boolean;
						}) => {
							this.configuration.config.webpackOptions.entry = entryOptions;
							this.configuration.config.item = action;
						});
				}
				const temp = action;
				if (action === "resolveLoader") {
					action = "resolve";
				}
				const webpackSchemaProp: ISchemaProperties = webpackSchema.definitions[action];
				/*
				 * https://github.com/webpack/webpack/blob/next/schemas/WebpackOptions.json
				 * Find the properties directly in the properties prop, or the anyOf prop
				 */
				let defOrPropDescription: object = webpackSchemaProp
					? webpackSchemaProp.properties
					: webpackSchema.properties[action].properties
						? webpackSchema.properties[action].properties
						: webpackSchema.properties[action].anyOf
							? webpackSchema.properties[action].anyOf.filter(
								(p: {
									properties?: object,
									enum?: any[],
								}) => p.properties || p.enum,
							  )
							: null;
				if (Array.isArray(defOrPropDescription)) {
					// Todo: Generalize these to go through the array, then merge enum with props if needed
					const hasPropertiesProp: boolean = traverseAndGetProperties(
						defOrPropDescription,
						"properties",
					);
					const hasEnumProp: boolean = traverseAndGetProperties(
						defOrPropDescription,
						"enum",
					);
					/* as we know he schema only has two arrays that might hold our values,
					 * check them for either having arr.enum or arr.properties
					*/
					if (hasPropertiesProp) {
						defOrPropDescription =
							defOrPropDescription[0].properties ||
							defOrPropDescription[1].properties;
						if (!defOrPropDescription) {
							defOrPropDescription = defOrPropDescription[0].enum;
						}
						// TODO: manually implement stats and devtools like sourcemaps
					} else if (hasEnumProp) {
						const originalPropDesc: object = defOrPropDescription[0].enum;
						// Array -> Object -> Merge objects into one for compat in manualOrListInput
						defOrPropDescription = Object.keys(defOrPropDescription[0].enum)
							.map((p: string): object => {
								return Object.assign(
									{},
									{
										[originalPropDesc[p]]: "noop",
									},
								);
							})
							.reduce((result: object, currentObject: object): object => {
								for (const key in currentObject) {
									if (currentObject.hasOwnProperty(key)) {
										result[key] = currentObject[key];
									}
								}
								return result;
							}, {});
					}
				}
				// WDS has its own schema, so we gonna need to check that too
				const webpackDevserverSchemaProp: ISchemaProperties =
					action === "devServer" ? webpackDevServerSchema : null;
				// Watch has a boolean arg, but we need to append to it manually
				if (action === "watch") {
					defOrPropDescription = {
						false: {},
						true: {},
					};
				}
				if (action === "mode") {
					defOrPropDescription = {
						development: {},
						production: {},
					};
				}
				action = temp;
				if (action === "resolveLoader") {
					defOrPropDescription = Object.assign(defOrPropDescription, {
						moduleExtensions: {},
					});
				}
				// If we've got a schema prop or devServer Schema Prop
				if (defOrPropDescription || webpackDevserverSchemaProp) {
					// Check for properties in definitions[action] or properties[action]
					if (defOrPropDescription) {
						if (action !== "devtool") {
							// Add the option of adding an own variable if the user wants
							defOrPropDescription = Object.assign(defOrPropDescription, {
								other: {},
							});
						} else {
							// The schema doesn't have the source maps we can prompt, so add those
							defOrPropDescription = Object.assign(defOrPropDescription, {
								"cheap-eval-source-map": {},
								"cheap-module-eval-source-map": {},
								"cheap-module-source-map": {},
								"cheap-source-map": {},
								"eval": {},
								"eval-source-map": {},
								"hidden-source-map": {},
								"inline-cheap-module-source-map": {},
								"inline-cheap-source-map": {},
								"inline-source-map": {},
								"nosources-source-map": {},
								"source-map": {},
							});
						}
						inputPrompt = List(
							"actionAnswer",
							`What do you want to add to ${action}?`,
							Object.keys(defOrPropDescription),
						);
						// We know we're gonna append some deep prop like module.rule
						isDeepProp[0] = true;
					} else if (webpackDevserverSchemaProp) {
						// Append the custom property option
						webpackDevserverSchemaProp.properties = Object.assign(
							webpackDevserverSchemaProp.properties,
							{
								other: {},
							},
						);
						inputPrompt = List(
							"actionAnswer",
							`What do you want to add to ${action}?`,
							Object.keys(webpackDevserverSchemaProp.properties),
						);
						// We know we are in a devServer.prop scenario
						isDeepProp[0] = true;
					} else {
						// manual input if non-existent
						inputPrompt = manualOrListInput(action);
					}
				} else {
					inputPrompt = manualOrListInput(action);
				}
				return this.prompt([
					inputPrompt,
				]);
			})
			.then((answerToAction: {
				actionAnswer: string,
			}) => {
				if (!answerToAction) {
					done();
					return;
				}
				/*
				 * Plugins got their own logic,
				 * find the names of each natively plugin and check if it matches
				*/
				if (action === "plugins") {
					const pluginExist: string = glob
						.sync([
							"node_modules/webpack/lib/*Plugin.js",
							"node_modules/webpack/lib/**/*Plugin.js",
						])
						.map((p: string): string =>
							p
								.split("/")
								.pop()
								.replace(".js", ""),
						)
						.find(
							(p: string): boolean => p.toLowerCase().indexOf(answerToAction.actionAnswer) >= 0,
						);

					if (pluginExist) {
						this.configuration.config.item = pluginExist;
						const pluginsSchemaPath: string = glob
							.sync([
								"node_modules/webpack/schemas/plugins/*Plugin.json",
								"node_modules/webpack/schemas/plugins/**/*Plugin.json",
							])
							.find(
								(p: string): boolean =>
									p
										.split("/")
										.pop()
										.replace(".json", "")
										.toLowerCase()
										.indexOf(answerToAction.actionAnswer) >= 0,
							);
						if (pluginsSchemaPath) {
							const constructorPrefix: string =
								pluginsSchemaPath.indexOf("optimize") >= 0
									? "webpack.optimize"
									: "webpack";
							const resolvePluginsPath: string = path.resolve(pluginsSchemaPath);
							const pluginSchema: object = resolvePluginsPath
								? require(resolvePluginsPath)
								: null;
							let pluginsSchemaProps: string[] = ["other"];
							if (pluginSchema) {
								Object.keys(pluginSchema)
									.filter((p: string): boolean => Array.isArray(pluginSchema[p]))
									.forEach((p: string): void => {
										Object.keys(pluginSchema[p]).forEach((n: string): void => {
											if (pluginSchema[p][n].properties) {
												pluginsSchemaProps = Object.keys(
													pluginSchema[p][n].properties,
												);
											}
										});
									});
							}

							return this.prompt([
								List(
									"pluginsPropType",
									`What property do you want to add ${pluginExist}?`,
									pluginsSchemaProps,
								),
							]).then((pluginsPropAnswer: {
								pluginsPropType: string,
							}) => {
								return this.prompt([
									Input(
										"pluginsPropTypeVal",
										`What value should ${pluginExist}.${
											pluginsPropAnswer.pluginsPropType
										} have?`,
									),
								]).then((valForProp: {
									pluginsPropTypeVal: string,
								}) => {
									this.configuration.config.webpackOptions[action] = {
										[`${constructorPrefix}.${pluginExist}`]: {
											[pluginsPropAnswer.pluginsPropType]:
												valForProp.pluginsPropTypeVal,
										},
									};
									done();
								});
							});
						} else {
							this.configuration.config.webpackOptions[
								action
							] = `new webpack.${pluginExist}`;
							done();
						}
					} else {
						// If its not in webpack, check npm
						npmExists(answerToAction.actionAnswer)
							.then((p: string) => {
								if (p) {
									this.dependencies.push(answerToAction.actionAnswer);
									const normalizePluginName = answerToAction.actionAnswer.replace(
										"-webpack-plugin",
										"Plugin",
									);
									const pluginName = replaceAt(
										normalizePluginName,
										0,
										normalizePluginName.charAt(0).toUpperCase(),
									);
									this.configuration.config.topScope.push(
										`const ${pluginName} = require("${
											answerToAction.actionAnswer
										}")`,
									);
									this.configuration.config.webpackOptions[
										action
									] = `new ${pluginName}`;
									this.configuration.config.item = answerToAction.actionAnswer;
									done();
									this.scheduleInstallTask(getPackageManager(), this.dependencies, {
										"save-dev": true,
									});
								} else {
									console.error(
										answerToAction.actionAnswer,
										"doesn't exist on NPM or is built in webpack, please check for any misspellings.",
									);
									process.exit(0);
								}
							});
					}
				} else {
					// If we're in the scenario with a deep-property
					if (isDeepProp[0]) {
						isDeepProp[1] = answerToAction.actionAnswer;
						if (
							isDeepProp[1] !== "other" &&
							(action === "devtool" || action === "watch" || action === "mode")
						) {
							this.configuration.config.item = action;
							this.configuration.config.webpackOptions[action] =
								answerToAction.actionAnswer;
							done();
							return;
						}
						// Either we are adding directly at the property, else we're in a prop.theOne scenario
						const actionMessage =
							isDeepProp[1] === "other"
								? `What do you want the key on ${
									action
								   } to be? (press enter if you want it directly as a value on the property)`
								: `What do you want the value of ${isDeepProp[1]} to be?`;

						this.prompt([
							Input("deepProp", actionMessage),
						]).then(
							(deepPropAns: {
								deepProp: string,
							}) => {
								// The other option needs to be validated of either being empty or not
								if (isDeepProp[1] === "other") {
									const othersDeepPropKey: string = deepPropAns.deepProp
										? `What do you want the value of ${
											deepPropAns.deepProp
										  } to be?` // eslint-disable-line
										: `What do you want to be the value of ${action} to be?`;
									// Push the answer to the array we have created, so we can use it later
									isDeepProp.push(deepPropAns.deepProp);
									this.prompt([
										Input("innerProp", othersDeepPropKey),
									]).then(
										(innerPropAns: {
											innerProp,
										}) => {
											// Check length, if it has none, add the prop directly on the given action
											if (isDeepProp[2].length === 0) {
												this.configuration.config.item = action;
												this.configuration.config.webpackOptions[action] =
													innerPropAns.innerProp;
											} else {
												// If not, we're adding to something like devServer.myProp
												this.configuration.config.item =
													action + "." + isDeepProp[2];
												this.configuration.config.webpackOptions[action] = {
													[isDeepProp[2]]: innerPropAns.innerProp,
												};
											}
											done();
										},
									);
								} else {
									// We got the schema prop, we've correctly prompted it, and can add it directly
									this.configuration.config.item = `${action}.${isDeepProp[1]}`;
									this.configuration.config.webpackOptions[action] = {
										[isDeepProp[1]]: deepPropAns.deepProp,
									};
									done();
								}
							},
						);
					} else {
						// We're asking for input-only
						this.configuration.config.item = action;
						this.configuration.config.webpackOptions[action] =
							answerToAction.actionAnswer;
						done();
					}
				}
			});
	}

	public writing() {
		this.config.set("configuration", this.configuration);
	}
}