builder-isv/models/moduleFactory.js

ISV 模块本地预览与云构建器

/**
 * @author 龙喜<xiaolong.lxl@alibaba-inc.com>
 * @description 模块工厂
 */

'use strict';

const fs = require('fs');
const path = require('path');
const config = require('../config');
const Base = require('./base');
const Module = require('./module');

let singleton;

module.exports = class ModuleFactory {
  constructor() {
    if (singleton) {
      return singleton;
    }

    singleton = this;

    /**
     * 模块 基于内存的 K-V store 缓存 :)
     * @type {Object} {'type/name': 1}
     */
    this.moduleCache = {};
  }

  /**
   * 模块实例
   * @param type
   * @param name
   * @param inputDir 当调用类型为 INVOKE_TYPE_BUILD 需传递此项
   * @returns {*}
   */
  getModule(type, name, inputDir) {
    let module = this.moduleCache[`${type}/${name}`];

    if (!module) {
      if (inputDir) {
        module = this.moduleCache[`${type}/${name}`] = new Module(inputDir, type, name, Base.INVOKE_TYPE_BUILD);
      } else {
        module = this.moduleCache[`${type}/${name}`] = new Module(null, type, name);
      }
    }

    return module;
  }
};