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

the builder of builders

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
      }, {})
  }
}