reservas/app/Domain/Reservations/Services/AvailabilityService.php

<?php

namespace App\Domain\Reservations\Services;

use App\Domain\Inventory\Models\SnipeAsset;
use App\Domain\Reservations\Enums\ReservationItemStatus;
use DateTimeInterface;
use Illuminate\Database\Eloquent\Builder;

class AvailabilityService
{
    /** @return Builder<SnipeAsset> */
    public function availableAssets(DateTimeInterface $startsAt, DateTimeInterface $endsAt): Builder
    {
        return SnipeAsset::query()
            ->where('active', true)
            ->where('requestable', true)
            ->whereNull('assigned_id')
            ->whereDoesntHave('reservationItems', fn (Builder $query): Builder => $query
                ->whereIn('status', ReservationItemStatus::blockingValues())
                ->where('starts_at', '<', $endsAt)
                ->where('ends_at', '>', $startsAt))
            ->whereDoesntHave('blocks', fn (Builder $query): Builder => $query
                ->where('starts_at', '<', $endsAt)
                ->where('ends_at', '>', $startsAt));
    }

    public function isAvailable(
        SnipeAsset $asset,
        DateTimeInterface $startsAt,
        DateTimeInterface $endsAt,
        ?int $exceptReservationId = null,
    ): bool {
        if (! $asset->active || ! $asset->requestable || $asset->assigned_id !== null) {
            return false;
        }

        $hasReservationConflict = $asset->reservationItems()
            ->whereIn('status', ReservationItemStatus::blockingValues())
            ->when($exceptReservationId, fn (Builder $query): Builder => $query->where('reservation_id', '!=', $exceptReservationId))
            ->where('starts_at', '<', $endsAt)
            ->where('ends_at', '>', $startsAt)
            ->exists();

        if ($hasReservationConflict) {
            return false;
        }

        return ! $asset->blocks()
            ->where('starts_at', '<', $endsAt)
            ->where('ends_at', '>', $startsAt)
            ->exists();
    }
}