handsontable/validators/dateValidator/dateValidator.mjs

Handsontable is a JavaScript Data Grid available for React, Angular and Vue.

import moment from 'moment';
import { getEditorInstance } from "../../editors/registry.mjs";
import { EDITOR_TYPE as DATE_EDITOR_TYPE } from "../../editors/dateEditor/index.mjs";
import { getNormalizedDate } from "../../helpers/date.mjs";
export const VALIDATOR_TYPE = 'date';

/**
 * The Date cell validator.
 *
 * @private
 * @param {*} value Value of edited cell.
 * @param {Function} callback Callback called with validation result.
 */
export function dateValidator(value, callback) {
  const dateEditor = getEditorInstance(DATE_EDITOR_TYPE, this.instance);
  let valueToValidate = value;
  let valid = true;
  if (valueToValidate === null || valueToValidate === undefined) {
    valueToValidate = '';
  }
  let isValidFormat = moment(valueToValidate, this.dateFormat || dateEditor.defaultDateFormat, true).isValid();
  let isValidDate = moment(new Date(valueToValidate)).isValid() || isValidFormat;
  if (this.allowEmpty && valueToValidate === '') {
    isValidDate = true;
    isValidFormat = true;
  }
  if (!isValidDate) {
    valid = false;
  }
  if (!isValidDate && isValidFormat) {
    valid = true;
  }
  if (isValidDate && !isValidFormat) {
    if (this.correctFormat === true) {
      // if format correction is enabled
      const correctedValue = correctFormat(valueToValidate, this.dateFormat);
      this.instance.setDataAtCell(this.visualRow, this.visualCol, correctedValue, 'dateValidator');
      valid = true;
    } else {
      valid = false;
    }
  }
  callback(valid);
}
dateValidator.VALIDATOR_TYPE = VALIDATOR_TYPE;

/**
 * Format the given string using moment.js' format feature.
 *
 * @param {string} value The value to format.
 * @param {string} dateFormat The date pattern to format to.
 * @returns {string}
 */
export function correctFormat(value, dateFormat) {
  const dateFromDate = moment(getNormalizedDate(value));
  const dateFromMoment = moment(value, dateFormat);
  const isAlphanumeric = value.search(/[A-Za-z]/g) > -1;
  let date;
  if (dateFromDate.isValid() && dateFromDate.format('x') === dateFromMoment.format('x') || !dateFromMoment.isValid() || isAlphanumeric) {
    date = dateFromDate;
  } else {
    date = dateFromMoment;
  }
  return date.format(dateFormat);
}