Add EventSeries (club-scoped): an RFC-5545 rrule + dtstart + duration and a
template (kind/title/location/opponent + audience M2M). Concrete Event rows
are materialised occurrences carrying a series FK plus detached/cancelled
flags; the series tracks excluded_dates (EXDATEs) and a generated_until
horizon watermark.
Recurrence service:
- occurrence_datetimes expands the rrule (via python-dateutil) up to a
horizon, minus EXDATEs.
- generate_occurrences materialises missing rows, copies the template +
audience (so attendance syncs through the existing signals), and is
idempotent.
- cancel_occurrence adds an EXDATE and deletes (or soft-cancels) one
occurrence so it isn't regenerated; detach_occurrence marks an occurrence
as independently edited; propagate_series re-applies the template to
non-detached future occurrences.
- extend_event_series management command rolls the horizon forward.
Register EventSeries in the admin and surface series/detached/cancelled on
the Event admin. Add python-dateutil. Full suite at 100% coverage.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Bernard Siebens
ca34d26a8e