polymorphic wrapper.js

const materials = [
  'course_work',
  'course_work',
  'exam',
  'project',
  'course_work'
]


const wrapPolymorphicAction = (action) => {


  const polymorphicWrapper = function (action) {

    return function () {
      const args = Array.from(arguments)
      const materialId = args[0]

      const materialType = materials[materialId]
      const controller = `controller for ${materialType} as parent`


      action.apply(this, [...args, controller])
    }
  }

  const wrappedAction = polymorphicWrapper(action)
  return wrappedAction

}



const getGradableChunk = (materialId, id, controller, trx) => {
  console.log(controller)
  return {
    content: 'stuff',
    name: 'thing',
    material_type: 'course_work'
  }
}

const wrappedGetGradableChunk = wrapPolymorphicAction(getGradableChunk)


wrappedGetGradableChunk(3, 45)