@modern-kit/utils/dist/date/isBirthDate/index.mjs

modern-kit/utils

import { isNumeric } from '../../validator/isNumeric/index.mjs';

const YEAR_SHORT_LENGTH = 6;
const YEAR_LONG_LENGTH = 8;
const YEAR_2000 = 2e3;
const YEAR_1900 = 1900;
const parseShortFormatDate = (birthDate) => {
  const currentYear = (/* @__PURE__ */ new Date()).getFullYear();
  const remainingYear = currentYear % 100;
  const birthYear = Number(birthDate.substring(0, 2));
  return {
    year: remainingYear > birthYear ? YEAR_2000 + birthYear : YEAR_1900 + birthYear,
    month: Number(birthDate.substring(2, 4)),
    day: Number(birthDate.substring(4, 6))
  };
};
const parseLongFormatDate = (birthDate) => {
  return {
    year: Number(birthDate.substring(0, 4)),
    month: Number(birthDate.substring(4, 6)),
    day: Number(birthDate.substring(6, 8))
  };
};
const isValidDateFormat = (dateString) => {
  const regex = /^(?:\d{4}|\d{2})[-](?:\d{2})[-](?:\d{2})$|^(?:\d{4}|\d{2})[.](?:\d{2})[.](?:\d{2})$|^(?:\d{4}|\d{2})[\/](?:\d{2})[\/](?:\d{2})$/;
  return regex.test(dateString);
};
const isValidDateInRange = (year, month, day) => {
  const date = new Date(year, month - 1, day);
  const currentYear = (/* @__PURE__ */ new Date()).getFullYear();
  const isValidYearRange = year >= YEAR_1900 && year <= currentYear;
  return date.getFullYear() === year && date.getMonth() === month - 1 && date.getDate() === day && isValidYearRange;
};
function isBirthDate(birthDate) {
  let birthDateToUse = birthDate;
  if (isValidDateFormat(birthDateToUse)) {
    birthDateToUse = birthDateToUse.replace(/[-/.]/g, "");
  }
  if (!isNumeric(birthDateToUse)) {
    return false;
  }
  if (birthDateToUse.length !== YEAR_SHORT_LENGTH && birthDateToUse.length !== YEAR_LONG_LENGTH) {
    return false;
  }
  const parsedBirthDate = birthDateToUse.length === YEAR_SHORT_LENGTH ? parseShortFormatDate(birthDateToUse) : parseLongFormatDate(birthDateToUse);
  const { year, month, day } = parsedBirthDate;
  return isValidDateInRange(year, month, day);
}

export { isBirthDate };
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