[IMP] website_event_online: add time-related computation on events

RATIONALE

Events are sometimes held online, gathering a community. In this merge we
improve Event application to better support full-online events with improved
tracks, wishlists, chat rooms, ...

PURPOSE

Reduce complexity of frontend templates and ease time-related display by
adding computed fields on event.

SPECIFICATIONS

Add following information to be used in future templates

  * is_ongoing: between start and end of event;
  * is_done: after end of event;
  * start_today: will start today, for example to display remaining hours
    before start;
  * start_remaining: remaining time before start;

Ensure timezone are correctly taken into account. Base heuristic is

  * datetime are stored in UTC in database;
  * TZ of event is stored on date_tz of event;
  * make most computation based on UTC: compare UTC of current visitor to
    UTC of event datetime;

LINKS

Community PR #53540
Enterprise PR odoo/enterprise#11384

Task ID-2252655 (Main Online Event task)
Task ID-2283796 (Event B2Basics / Registration Flow)

Co-Authored-By: Aurélien Warnon <awa@odoo.com>
Co-Authored-By: David Beguin <dbe@odoo.com>
Co-Authored-By: Thibault Delavallée <tde@odoo.com>

0 files changed, 0 insertions, 0 deletions