Set foundation for new handling of doublers

app/Models/Audition.php

@@ -11,6 +11,7 @@ use Illuminate\Database\Eloquent\Relations\BelongsTo;
 use Illuminate\Database\Eloquent\Relations\BelongsToMany;
 use Illuminate\Database\Eloquent\Relations\HasMany;
 
+use Illuminate\Support\Collection;
 use function in_array;
 
 class Audition extends Model
@@ -129,6 +130,17 @@ class Audition extends Model
         return $this->hasMany(Seat::class);
     }
 
+    public function getDoublerEntries(): Collection
+    {
+        return $this->entries()
+            ->whereIn('student_id', function ($query) {
+                $query->select('student_id')
+                    ->from('doubler_entry_counts')
+                    ->where('event_id', $this->event_id);
+            })
+            ->get();
+    }
+
     public function scopeOpen(Builder $query): void
     {
         $currentDate = Carbon::now('America/Chicago');

app/Models/DoublerEntryCount.php

@@ -0,0 +1,21 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+
+class DoublerEntryCount extends Model
+{
+    protected $table = 'doubler_entry_counts';
+
+    public function student(): BelongsTo
+    {
+        return $this->belongsTo(Student::class);
+    }
+
+    public function event(): BelongsTo
+    {
+        return $this->belongsTo(Event::class);
+    }
+}

app/Models/Student.php

@@ -50,6 +50,9 @@ class Student extends Model
         return $this->hasMany(HistoricalSeat::class);
     }
 
+    /**
+     * Returns the directors at this student's school.
+     */
     public function users(): HasManyThrough
     {
         return $this->hasManyThrough(
@@ -62,6 +65,11 @@ class Student extends Model
         );
     }
 
+    /**
+     * Returns the directors at this student's school.
+     * Alias of users())
+     * '
+     */
     public function directors(): HasManyThrough
     {
         return $this->users();
@@ -85,4 +93,14 @@ class Student extends Model
     {
         return $this->hasMany(DoublerRequest::class);
     }
+
+    public function isDoublerInEvent(Event|int $event): bool
+    {
+        $eventId = $event instanceof Event ? $event->id : $event;
+
+        return DoublerEntryCount::where([
+            'event_id' => $eventId,
+            'student_id' => $this->id,
+        ])->exists();
+    }
 }

database/migrations/2025_06_14_142507_doubler_entry_counts.php

@@ -0,0 +1,35 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        DB::statement('
+        CREATE VIEW doubler_entry_counts AS
+        SELECT
+            e.event_id,
+            ent.student_id,
+            COUNT(*) as entry_count
+        FROM entries ent
+        JOIN auditions e ON e.id = ent.audition_id
+        GROUP BY e.event_id, ent.student_id
+        HAVING COUNT(*) > 1
+    ');
+
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        //
+    }
+};