dmn-js-decision-table/lib/features/simple-date-edit/Utils.js

A decision table view for dmn-js

const ISO_DATE_REGEX = /^\d{4}(?:-\d\d){2}$/;
const BETWEEN_DATE_REGEX = /^\[date\("([^"]*)"\)..date\("([^"]*)"\)\]$/;
const BEFORE_AFTER_DATE_REGEX = /^(<|>)\s*date\("([^"]*)"\)$/;
const EXACT_DATE_REGEX = /^date\("([^"]*)"\)$/;
const EXACT = 'exact',
  BEFORE = 'before',
  AFTER = 'after',
  BETWEEN = 'between';
export function validateISOString(string) {
  if (!ISO_DATE_REGEX.test(string.trim())) {
    return 'Date must match pattern yyyy-MM-dd';
  }
}
export function getDateString(type, dates) {
  if (type === EXACT) {
    return `date("${dates[0]}")`;
  } else if (type === BEFORE) {
    return `< date("${dates[0]}")`;
  } else if (type === AFTER) {
    return `> date("${dates[0]}")`;
  } else if (type === BETWEEN) {
    return `[date("${dates[0]}")..date("${dates[1]}")]`;
  }
}
export function getSampleDate() {
  const date = new Date();
  date.setUTCHours(0, 0, 0, 0);
  return date.toISOString().slice(0, 10);
}
export function parseString(string) {
  // emtpy
  if (!string || string.trim() === '') {
    return {
      type: 'exact',
      date: ''
    };
  }

  // between
  let matches = string.match(BETWEEN_DATE_REGEX);
  if (matches) {
    return {
      type: 'between',
      dates: [matches[1], matches[2]]
    };
  }

  // before or after
  matches = string.match(BEFORE_AFTER_DATE_REGEX);
  if (matches) {
    return {
      type: matches[1] === '<' ? 'before' : 'after',
      date: matches[2]
    };
  }

  // exact
  matches = string.match(EXACT_DATE_REGEX);
  if (matches) {
    return {
      type: 'exact',
      date: matches[1]
    };
  }
}
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