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

the builder of builders

const ChainedMap = require('./ChainedMap')

module.exports = class extends ChainedMap {
  constructor(parent) {
    super(parent)
    this.extend(['init'])

    this.init((Plugin, args = []) => new Plugin(...args))
  }

  use(plugin, args = []) {
    return this
      .set('plugin', plugin)
      .set('args', args)
  }

  tap(f) {
    this.set('args', f(this.get('args') || []))
    return this
  }

  merge(obj) {
    if (obj.plugin) {
      this.set('plugin', obj.plugin)
    }

    if (obj.args) {
      this.set('args', obj.args)
    }

    if (Array.isArray(obj)) {
      for (const i in obj) {
        const plugin = obj[i]
      }
    }

    return this
  }

  toConfig() {
    const init = this.get('init')

    return init(this.get('plugin'), this.get('args'))
  }
}