app/Models/Event.php

@@ -5,6 +5,7 @@ namespace App\Models;
 use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Database\Eloquent\Relations\HasMany;
+use Illuminate\Database\Eloquent\Relations\HasManyThrough;
 
 class Event extends Model
 {
@@ -22,7 +23,7 @@ class Event extends Model
             ->orderBy('rank');
     }
 
-    public function entries()
+    public function entries(): HasManyThrough
     {
         return $this->hasManyThrough(Entry::class, Audition::class);
     }

app/Models/User.php

@@ -125,7 +125,7 @@ class User extends Authenticatable implements MustVerifyEmail
 
     public function isJudge(): bool
     {
-        return $this->judgingAssignments->count() > 0;
+        return $this->judgingAssignments()->count() > 0;
     }
 
     /**

app/Providers/AppServiceProvider.php

@@ -28,6 +28,7 @@ use App\Observers\StudentObserver;
 use App\Observers\SubscoreDefinitionObserver;
 use App\Observers\UserObserver;
 use App\Services\AuditionService;
+use App\Services\DoublerService;
 use App\Services\DrawService;
 use App\Services\EntryService;
 use App\Services\ScoreService;
@@ -49,6 +50,7 @@ class AppServiceProvider extends ServiceProvider
         $this->app->singleton(EntryService::class, EntryService::class);
         $this->app->singleton(ScoreService::class, ScoreService::class);
         $this->app->singleton(UserService::class, UserService::class);
+        $this->app->singleton(DoublerService::class, DoublerService::class);
     }
 
     /**

app/Services/DoublerService.php

@@ -3,32 +3,36 @@
 namespace App\Services;
 
 use App\Models\Entry;
+use App\Models\Event;
 use App\Models\Student;
-use Illuminate\Contracts\Database\Eloquent\Builder;
 use Illuminate\Support\Facades\Cache;
 
 class DoublerService
 {
-    protected $doublersCacheKey = 'doublers';
-
-    protected $auditionService;
-
-    protected $tabulationService;
-
-    protected $seatingService;
-
-    /**
-     * Create a new class instance.
-     */
-    public function __construct(
-        AuditionService $auditionService,
-        TabulationService $tabulationService,
-        SeatingService $seatingService
-    ) {
-        $this->auditionService = $auditionService;
-        $this->tabulationService = $tabulationService;
-        $this->seatingService = $seatingService;
+    public function doublersForEvent(Event $event)
+    {
+        $cacheKey = 'event'.$event->id.'doublers';
+        return Cache::remember($cacheKey, 60, function () use ($event) {
+            return $this->findDoublersForEvent($event);
+        });
     }
 
-
+    protected function findDoublersForEvent(Event $event): array
+    {
+        $entries = $event->entries;
+        $entries->load('student.school');
+        $entries->load('audition');
+        $grouped = $entries->groupBy('student_id');
+        // Filter out student groups with only one entry in the event
+        $grouped = $grouped->filter(fn ($s) => $s->count() > 1);
+        $doubler_array = [];
+        foreach ($grouped as $student_id => $entries) {
+            $doubler_array[$student_id] = [
+                'student' => $entries[0]->student,
+                'entries' => $entries,
+            ];
+        }
+
+        return $doubler_array;
+    }
 }