validate.ts

import { FormField, FormFieldsV3 } from '../types'

function determineIsFormFields(tbd: any): tbd is FormField[] {
  if (!Array.isArray(tbd)) {
    return false
  }

  // If there exists even a single internal response that does not fit the
  // shape, the object is not created properly.
  const filter = tbd.filter(
    (internal) =>
      // Have either answer or answerArray or is isHeader
      // Since empty strings are allowed, check using typeof.
      (typeof internal.answer === 'string' ||
        Array.isArray(internal.answerArray) ||
        internal.isHeader) &&
      internal._id &&
      internal.fieldType &&
      // The field is still valid even when the question title is empty string
      // (even though it is not intended behavior).
      typeof internal.question === 'string'
  )

  return filter.length === tbd.length
}

// TODO(MRF): This is currently very rudimentary, we should look at making this more specific where required.
function determineIsFormFieldsV3(tbd: any): tbd is FormFieldsV3 {
  for (const id of Object.keys(tbd)) {
    const value = tbd[id]
    const hasCorrectShape = value.fieldType && value.answer !== undefined
    if (!hasCorrectShape) return false
  }
  return true
}

export { determineIsFormFields, determineIsFormFieldsV3 }