APCOvernight/node-utils

'use strict'

const Moment = require('moment')

const months = [
  { label: 'January', value: '01' },
  { label: 'February', value: '02' },
  { label: 'March', value: '03' },
  { label: 'April', value: '04' },
  { label: 'May', value: '05' },
  { label: 'June', value: '06' },
  { label: 'July', value: '07' },
  { label: 'August', value: '08' },
  { label: 'September', value: '09' },
  { label: 'October', value: '10' },
  { label: 'November', value: '11' },
  { label: 'December', value: '12' }
]

/**
 * Generate Year options for dropdown
 * @private
 * @param  {Number} currentYear
 * @return {Array.Object}
 */
const _generateYears = currentYear => {
  const years = []
  Array.from(Array(100).keys()).forEach(index => {
    index = currentYear - index - 8
    years.push({
      label: index.toString(),
      value: index.toString()
    })
  })
  return years
}

/**
 * Generate day of month options for dropdown
 * @private
 * @return {Array.Object}
 */
const _generateDays = () => {
  const days = []
  Array.from(Array(31).keys()).forEach(index => {
    const str = `${index + 1}`
    days.push({
      label: str,
      value: (`0${str}`).slice(-2)
    })
  })
  return days
}

/**
 * Return form field options and values for date of birth
 *
 * @module Format/DateOfBirth
 * @requires moment
 * @param  {String} [dateOfBirth] Partial or complete URL
 * @return {Object}               Select options and selected values ready for select mixins
 *
 * @example
 * DateOfBirth('1995-03-05')
 *
 * // returns {
 * //   days: [{label: '1', value: '01'}, {label: '1', value: '02'}...],
 * //   months: [{label: 'January', value: '01'}, {label: 'February', value: '02'}...],
 * //   years: [{label: '1920', value: '1920'}, {label: '1921', value: '1921'}...],
 * //   day: '05',
 * //   month: '03',
 * //   year: '1995'
 * // }
 */
module.exports = (dateOfBirth) => {
  const currentYear = Moment().format('YYYY')

  let year = (currentYear - 30).toString()
  let month = '01'
  let day = '01'

  if (dateOfBirth && typeof dateOfBirth === 'string') {
    const split = dateOfBirth.split('-')
    year = split[0]
    month = split[1]
    day = split[2]
  }

  const years = _generateYears(currentYear)

  const days = _generateDays()

  return { years, months, days, year, month, day }
}