@talend/react-components/lib-esm/DateTimePickers/generator.js

Set of react components.

import { addMonths } from 'date-fns/addMonths';
import { format } from 'date-fns/format';
import { getYear } from 'date-fns/getYear';
import { setDay } from 'date-fns/setDay';
import { date } from '@talend/utils';
import getLocale from '../i18n/DateFnsLocale/locale';
import { chunk, memoize } from "lodash";
function buildDateFnsLocale() {
  return {
    locale: getLocale()
  };
}
export const getPickerLocale = memoize(buildDateFnsLocale);

/**
 * Generate days of week, starting from the provided index
 */
export function buildDayNames(firstDayOfweek = 1, t) {
  const pickerLocale = getPickerLocale(t);
  return new Array(7).fill(0).map((_, i) => (i + firstDayOfweek) % 7).map(dayOfWeek => setDay(new Date(0), dayOfWeek)).map(headerDate => ({
    abbr: format(headerDate, 'EEEEE', pickerLocale),
    full: format(headerDate, 'EEEE', pickerLocale)
  }));
}
export const buildWeeks = date.buildWeeks;
/**
 * Generate th sets of months, each set has the size of provided "chunkSize"
 */
export function buildMonths(chunkSize, t) {
  const pickerLocale = getPickerLocale(t);
  const months = new Array(12).fill(0).map((_, i) => i).map(index => ({
    index,
    name: format(addMonths(new Date(0), index), 'MMMM', pickerLocale)
  }));
  return chunk(months, chunkSize);
}

/**
 * Generate a years window, centered on the current year by default, or the provided one
 */
export function buildYears(middle, window = 3) {
  const middleYear = middle === undefined ? getYear(new Date()) : middle;
  const start = middleYear - window;
  const end = middleYear + window;
  const years = [];
  for (let i = start; i <= end; i += 1) {
    years.push(i);
  }
  return years;
}
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