fliphub-monorepo/modules-sub/flip-webpack-chain/lib/ChainedMap.js

the builder of builders

'use strict';

const Chainable = require('./Chainable');

module.exports = class extends Chainable {
  constructor(parent) {
    super(parent);
    this.store = new Map();
  }

  extend(methods) {
    this.shorthands = methods;
    methods.map(method => {
      this[method] = value => this.set(method, value);
    });
  }

  clear() {
    this.store.clear();
    return this;
  }

  delete(key) {
    this.store.delete(key);
    return this;
  }

  entries() {
    const entries = [...this.store];

    if (!entries.length) {
      return;
    }

    return entries.reduce((acc, [key, value]) => {
      acc[key] = value;
      return acc;
    }, {});
  }

  values() {
    return [...this.store.values()];
  }

  get(key) {
    return this.store.get(key);
  }

  has(key) {
    return this.store.has(key);
  }

  set(key, value) {
    this.store.set(key, value);
    return this;
  }

  merge(obj) {
    Object.keys(obj).forEach(key => this.set(key, obj[key]));
    return this;
  }

  clean(obj) {
    return Object.keys(obj).reduce((acc, key) => {
      const value = obj[key];

      if (value === undefined) {
        return acc;
      }

      if (Array.isArray(value) && !value.length) {
        return acc;
      }

      if (Object.prototype.toString.call(value) === '[object Object]' && !Object.keys(value).length) {
        return acc;
      }

      acc[key] = value;

      return acc;
    }, {});
  }
};