@accounter/server/src/modules/transactions/helpers/effective-date.helper.ts

import { format } from 'date-fns';
import type { TimelessDateString } from '@shared/types';
import type { IGetTransactionsByIdsResult } from '../types.js';

export function effectiveDateSupplement(transaction: IGetTransactionsByIdsResult) {
  // if debit_date exists - use it
  if (transaction.debit_date) {
    return format(transaction.debit_date, 'yyyy-MM-dd') as TimelessDateString;
  }
  // if currency is ILS or account_type is not creditcard - use event_date
  if (transaction.currency === 'ILS') {
    return format(transaction.event_date!, 'yyyy-MM-dd') as TimelessDateString;
  }
  return null;
}