utilities.ts

import type { DocketDateString } from './types.js'

const monthNumbers = {
  JAN: '01',
  FEB: '02',
  MAR: '03',
  APR: '04',
  MAY: '05',
  JUN: '06',
  JUL: '07',
  AUG: '08',
  SEP: '09',
  OCT: '10',
  NOV: '11',
  DEC: '12'
}

/**
 * Converts the court date on the docket into a standardized format.
 * @param {string} courtDateString ex. "10 JAN 2024"
 * @returns {DocketDateString} ex. "2024/01/10"
 */
export function normalizeCourtDate(courtDateString: string): DocketDateString {
  const courtDatePieces = courtDateString.padStart(11, '0').split(' ')

  const monthString = monthNumbers[courtDatePieces[1]]

  return `${courtDatePieces[2]}/${monthString}/${courtDatePieces[0]}` as DocketDateString
}

/**
 * Converts the line item dates on the docket into a standardized format.
 * @param {string} itemDateString ex. "1AUG23"
 * @returns {DocketDateString} ex. "2023/08/01"
 */
export function normalizeItemDate(
  itemDateString: string
): DocketDateString | undefined {
  if (itemDateString === '00') {
    return undefined
  }

  const currentDate = new Date()
  const currentCentury =
    currentDate.getFullYear() - (currentDate.getFullYear() % 100)

  const itemDateStringPadded = itemDateString.padStart(7, '0')

  let itemYear =
    currentCentury + Number.parseInt(itemDateStringPadded.slice(5), 10)

  const itemMonthString = monthNumbers[
    itemDateStringPadded.slice(2, 5)
  ] as string

  const itemDayString = itemDateStringPadded.slice(0, 2)

  const itemDate = new Date(
    itemYear,
    Number.parseInt(itemMonthString, 10) - 1,
    Number.parseInt(itemDayString, 10)
  )

  if (itemDate.getTime() > currentDate.getTime()) {
    itemYear -= 100
  }

  return `${itemYear.toString()}/${itemMonthString}/${itemDayString}` as DocketDateString
}