update codigo referido funcionamiento login, register y dashboard

app/Models/User.php

@@ -7,6 +7,7 @@ use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Foundation\Auth\User as Authenticatable;
 use Illuminate\Notifications\Notifiable;
 use Laravel\Sanctum\HasApiTokens;
+use Illuminate\Support\Str;
 
 class User extends Authenticatable
 {
@@ -22,6 +23,12 @@ class User extends Authenticatable
         'rol_id',
         'subvendedor_id',
         'subvendedor',
+
+        'referral_code',
+        'parent_id',
+
+
+        'rank_id',
     ];
 
     protected $hidden = [
@@ -107,4 +114,36 @@ class User extends Authenticatable
     {
         return $this->hasMany(User::class, 'subvendedor_id');
     }
+
+    // Referral relationships
+    public function parent()
+    {
+        return $this->belongsTo(User::class, 'parent_id');
+    }
+
+    public function children()
+    {
+        return $this->hasMany(User::class, 'parent_id')->orderBy('created_at', 'desc');
+    }
+
+    // public function rank()
+    // {
+    //     return $this->belongsTo(Rank::class);
+    // }
+
+    protected static function boot()
+    {
+        parent::boot();
+
+        static::creating(function ($user) {
+            if (empty($user->referral_code)) {
+                do {
+                    $code = strtoupper(Str::random(8));
+                } while (self::where('referral_code', $code)->exists());
+
+                $user->referral_code = $code;
+            }
+        });
+    }
+
 }