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unsupervised-scheduler/src/Availability/AvailabilitySlot.php
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thatguygriffandClaude Fable 5 b7d5e3039e
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Split availability windows into bookable lesson-length slots with weekly calendar views
Availability windows were stored and served as a single bookable row, so a
9:00 AM-4:00 PM window showed to students as one giant slot and booking it
consumed the whole day; past and multi-day windows also leaked into the
booking page as nonsense entries.

- Split windows into consecutive lesson-length slots on save (REST and admin
  form); each chunk is independently bookable and weekly recurrence creates a
  series per chunk so "reserve this time weekly" holds the same hour each week
- Reject windows spanning multiple days or shorter than the lesson length
  (400 invalid_window)
- Never return slots whose start has passed from GET /availability
- Migrate pre-split rows: Plugin::boot re-runs the Installer on version change
  and AvailabilityRepository::splitOversizedWindows() rewrites unbooked
  same-day oversized windows in place
- Display all times in 12-hour AM/PM form (booking page, wp-admin lists,
  editor previews)
- Add a List | Week view toggle to the student booking page and the
  instructor availability page, with previous/next-week navigation honouring
  the site's start_of_week option (new WeekCalendar helper)

Co-Authored-By: Claude Fable 5 <[email protected]>
2026-07-05 16:00:47 -03:00

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<?php
declare(strict_types=1);
namespace Unsupervised\Schedular\Availability;
use Unsupervised\Schedular\Val;
class AvailabilitySlot {
public function __construct(
public readonly int $instructorId,
public readonly string $startDt,
public readonly string $endDt,
public readonly int $durationMinutes = 60,
public readonly ?int $offeringId = null,
public readonly bool $isBooked = false,
public readonly ?int $recurrenceGroup = null,
public readonly ?int $id = null,
) {}
/**
* Normalise a submitted slot datetime to canonical `Y-m-d H:i:s`, or null when
* it is not a real datetime. Accepts the HTML `datetime-local` form
* (`Y-m-d\TH:i`, optionally with seconds) and the canonical form (optionally
* without seconds). Anything else — including strings PHP would "helpfully"
* coerce — is rejected so garbage never reaches the DATETIME column or throws
* inside the weekly-series date arithmetic.
*/
public static function normalizeDateTime( string $value ): ?string {
foreach ( [ 'Y-m-d H:i:s', 'Y-m-d H:i', 'Y-m-d\TH:i:s', 'Y-m-d\TH:i' ] as $format ) {
$dt = \DateTimeImmutable::createFromFormat( '!' . $format, $value );
if ( false !== $dt && $dt->format( $format ) === $value ) {
return $dt->format( 'Y-m-d H:i:s' );
}
}
return null;
}
/**
* Split this window into consecutive lesson-length slots: 09:0016:00 with
* 60-minute lessons yields seven bookable slots. A trailing remainder shorter
* than the lesson length is dropped, and an empty list is returned when the
* window cannot fit a single lesson.
*
* @return list<self>
*/
public function splitByDuration(): array {
if ( $this->durationMinutes <= 0 ) {
return [];
}
$end = new \DateTimeImmutable( $this->endDt );
$step = new \DateInterval( 'PT' . $this->durationMinutes . 'M' );
$cursor = new \DateTimeImmutable( $this->startDt );
$chunkEnd = $cursor->add( $step );
$slots = [];
while ( $chunkEnd <= $end ) {
$slots[] = new self(
instructorId: $this->instructorId,
startDt: $cursor->format( 'Y-m-d H:i:s' ),
endDt: $chunkEnd->format( 'Y-m-d H:i:s' ),
durationMinutes: $this->durationMinutes,
offeringId: $this->offeringId,
);
$cursor = $chunkEnd;
$chunkEnd = $cursor->add( $step );
}
return $slots;
}
public static function fromRow( \stdClass $row ): self {
return new self(
instructorId: Val::int( $row->instructor_id ),
startDt: Val::string( $row->start_dt ),
endDt: Val::string( $row->end_dt ),
durationMinutes: Val::int( $row->duration_minutes ),
offeringId: Val::intOrNull( $row->offering_id ),
isBooked: Val::bool( $row->is_booked ),
recurrenceGroup: Val::intOrNull( $row->recurrence_group ),
id: Val::int( $row->id ),
);
}
/**
* Returns a plain array representation of the slot.
*
* @return array<string, mixed>
*/
public function toArray(): array {
return [
'id' => $this->id,
'instructor_id' => $this->instructorId,
'offering_id' => $this->offeringId,
'start_dt' => $this->startDt,
'end_dt' => $this->endDt,
'duration_minutes' => $this->durationMinutes,
'is_booked' => $this->isBooked,
'recurrence_group' => $this->recurrenceGroup,
];
}
}