NPM: Add `moment`

[mjansenDatabay]

trafficstars

This PR adds moment as NPM dependency.

Usage:

• Calendar: ./components/ILIAS/Calendar/classes/class.ilCalendarUtil.php
• Legacy Forms: Implicitly by ilCalendarUtil in the ilDateTimeInputGUI field type
• OnScreenChat: ./components/ILIAS/OnScreenChat/js/moment.js
  • It is mainly (but not only) used to display relative dates and especially times (locale aware) in the conversation windows. These date/time presentations are dynamically updated (without expensive server round-trips) every 60 seconds:

			setInterval(() => {
				$('[data-livestamp]').each(() => {
					let $this = $(this);
					$this.html(dateTimeFormatter.fromNowToTime($this.data("livestamp")));
				});
				$('[data-message-time]').each(() => {
					let $this = $(this);
					$this.attr("title", dateTimeFormatter.format($this.data("message-time", "LT")));
				});
			}, 60000);

Wrapped By:

• OnScreenChat: https://github.com/ILIAS-eLearning/ILIAS/blob/trunk/components/ILIAS/OnScreenChat/js/moment.js

Reasoning:

• moment is a JavaScript library to parse, validate, manipulate and display dates and times in JavaScript. It has been initially introduced by the Calendar component and is still used there. I guess it has been added as dependency because at that time JavaScript did not support any locale aware date/time formatting. As a project we could agree upon a migration to the native JavaScript Intl.DateTimeFormat and Intl.RelativeTimeFormat packages for client-side date.

Maintenance:

• moment is actively maintained.

Links:

• NPM: https://www.npmjs.com/package/moment
• GitHub: https://github.com/moment/moment
• Documentation: https://momentjs.com/docs/

[mjansenDatabay]

This is the same PR as #6891 but with the correct upstream.

[matthiaskunkel]

Jour Fixe, 22 JAN 2024: Dependency is accepted for ILIAS 10.

[klees]

This should have become part of ILIAS 10 via this PR. As always, something might have gone wrong. If you are still missing that package, please ping me.

Kind regards!