feat: complete reservation lifecycle

app/Domain/Reservations/Services/AvailabilityService.php

@@ -5,9 +5,26 @@ 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): bool
     {
         if (! $asset->active || ! $asset->requestable || $asset->assigned_id !== null) {