corporate-frontend-mithril/src/lib/helpers/dates.js

Corporate frontend MithrilJS modules

const moment = require('moment');
const _ = require('lodash');

/**
 *
 * The main purpose for this Dates class is to make sure the corporate website has the standard date format across the whole site.
 *
 * TODO mocha Test
 */

let getDateUTCFormat = function (candidate) {
    return moment.utc(candidate)._f;
};
exports.getDateUTCFormat = getDateUTCFormat;

/**
 * Get current year
 * return {number} - current year, e.g. 2017
 */
let getCurrentYear = function () {
    return new Date().getFullYear();
};
exports.getCurrentYear = getCurrentYear;


/**
 * Get in a day, e.g. 10am, 5pm
 * @param candidate {Date} - date
 * @returns {string} hour in a day, e.g. 10am, 5pm
 */
let getHour = function (candidate) {
    if(_.includes(this.getDateUTCFormat(candidate), 'HH') ) {
        return moment(candidate).format('ha');
    } else {
        return '';
    }
};
exports.getHour = getHour;

/**
 * Get in a day, e.g. 10:45am, 5:32pm
 * Note: 9:00am will be 9am
 * @param candidate {Date} - date
 * @returns {string} minute in a day, e.g. 10am, 5pm
 */
let getHourMinute = function (candidate) {
    if(_.includes(this.getDateUTCFormat(candidate), 'HH:mm')) {
        return moment(candidate).format('h.mma').replace('.00', '');
    } else {
        return '';
    }
};
exports.getHourMinute = getHourMinute;

/**
 * Get corporate website standard date, e.g. 14 November 2016, time format will be YYYY-MM-DDTHH:mm:ss
 * @param candidate {Date} - date
 * @returns {string} - date string e.g. 12 November 2016
 */
let getDate = function (candidate) {
    return `${moment(candidate).format('D')} ${moment(candidate).format('MMMM')} ${moment(candidate).format('YYYY')}` ;
};
exports.getDate = getDate;


let getDateTime = function (candidate) {
    let date = getDate(candidate);
    let hours = getHourMinute(candidate);
    return `${hours}, ${date}`;
};
exports.getDateTime = getDateTime;


/**
 * Get hour and date
 * @param candidate {Date} - date
 * @returns {string} - date string e.g. 10am, 14 November 2016
 */
let getHourAndDate = function (candidate) {
    if( _.isEmpty(this.getHour(candidate)) ){
        return this.getDate(candidate);
    }
    return `${this.getHour(candidate)}, ${this.getDate(candidate)}`;
};
exports.getHourAndDate = getHourAndDate;

/**
 * Get hour, minutes and date
 * @param candidate {Date} - date
 * @returns {string} - date string e.g. 10:45am, 14 November 2016
 */
let getHourMinuteAndDate = function (candidate) {
    if( _.isEmpty(this.getHour(candidate)) ){
        return this.getDate(candidate);
    }
    return `${this.getHourMinute(candidate)}, ${this.getDate(candidate)}`;
};
exports.getHourMinuteAndDate = getHourMinuteAndDate;

/**
 * Convert seconds into mm:ss or hh:mm:ss
 */
let convertSeconds = function (data, format='mm:ss') {
    let minutes = Math.floor(data / 60);
    let seconds = data - minutes * 60;
    let hours = Math.floor(data / 3600);
    if(Object.is(format, 'mm:ss')) {
        return `${pad(minutes,'0',2)} : ${pad(seconds,'0',2)}`;
    }
    return `${pad(hours,'0',2)} : ${pad(minutes,'0',2)} : ${pad(seconds,'0',2)}`;
};
exports.convertSeconds = convertSeconds;

/**
 * Pad of number
 * @param {number} num 
 */
let pad = function (string,pad,length) {
    return (new Array(length+1).join(pad)+string).slice(-length);
};
exports.pad = pad;