DateHelper.js

const config = require('../config/config.json');
const moment = require('moment');
const debug = require('debug')('DateHelper');

class Date {
  /**
   * Gets the day of the week
   * @param  {[type]} date [description]
   * @return moment date
   */
  constructor() {
    this.date = config.date;
  }
  // eslint-disable-next-line class-methods-use-this
  getDayOfWeek(date = this.date, format = 'DD-MM-YYYY') {
    return moment(date, format).isValid() ? moment(date, format).format('dddd') : false;
  }
  /**
   * Checks date inputs and returns dates
   */
  // eslint-disable-next-line class-methods-use-this
  getStartAndEndDate(startDate = false, endDate = false) {
    const end = endDate ? moment(endDate) : moment(config.date);
    const start = startDate ? moment(startDate) : end.clone().subtract(13, 'days');

    return {
      start,
      end,
    };
  }
  /**
   * Gets an array of dates between two days
   */
  // eslint-disable-next-line class-methods-use-this
  getDaysBetweenTwoDates(start, end, singularDay) {
    const dates = [];
    const now = moment(start);
    const momentEnd = moment(end);

    if (!start || !end) {
      return false;
    }

    if (momentEnd.isSameOrBefore(start)) {
      throw new Error('End date is the same or before the start date. This would cause an infinite loop');
    }

    while (now.isSameOrBefore(end)) {
      if (!singularDay || now.day() == singularDay) {
        dates.push([now.format(), now.format('dddd'), now]);
      }
      now.add(1, 'days');
    }

    return dates;
  }
  // eslint-disable-next-line class-methods-use-this
  getMonth(date = this.date) {
    const end = moment(date)
      .endOf('month')
      .format('YYYY-MM-DD');
    const start = moment(date)
      .startOf('month')
      .format('YYYY-MM-DD');
    const name = moment(date).format('MMMM');

    return { start, end, name };
  }
}

module.exports = new Date();