diff --git a/backend/app/Http/Controllers/InternshipStatusDataController.php b/backend/app/Http/Controllers/InternshipStatusDataController.php
index fabfe1d..b8709f4 100644
--- a/backend/app/Http/Controllers/InternshipStatusDataController.php
+++ b/backend/app/Http/Controllers/InternshipStatusDataController.php
@@ -44,9 +44,7 @@ class InternshipStatusDataController extends Controller
             abort(403, 'Unauthorized');
         }
 
-        $currentStatus = $internship->status;
-        $nextPossibleStatuses = $this->possibleNewStatuses($currentStatus->status, $user->role, $internship->report_confirmed);
-
+        $nextPossibleStatuses = $internship->nextStates($user->role);
         return response()->json($nextPossibleStatuses);
     }
 
@@ -109,7 +107,7 @@ class InternshipStatusDataController extends Controller
         }
 
         $internshipStatus = $internship->status;
-        $newStatusValidator = 'in:' . implode(',', $this->possibleNewStatuses($internshipStatus->status, $user->role, $internship->report_confirmed));
+        $newStatusValidator = 'in:' . implode(',', $internship->nextStates($user->role));
 
         $request->validate([
             'status' => ['required', 'string', 'uppercase', $newStatusValidator],
@@ -136,35 +134,4 @@ class InternshipStatusDataController extends Controller
     {
         //
     }
-
-    private function possibleNewStatuses(string $current_status, string $userRole, bool $report_confirmed)
-    {
-        if ($userRole === "STUDENT")
-            return [];
-
-        switch ($current_status) {
-            case 'SUBMITTED':
-                return ['CONFIRMED', 'DENIED'];
-            case 'CONFIRMED':
-                if ($userRole === 'EMPLOYER') {
-                    return ['DENIED'];
-                }
-
-                if ($report_confirmed) {
-                    return ['SUBMITTED', 'DENIED', 'DEFENDED', 'NOT_DEFENDED'];
-                }
-
-                return ['SUBMITTED', 'DENIED'];
-            case 'DENIED':
-                if ($userRole === 'EMPLOYER') {
-                    return ['CONFIRMED'];
-                }
-                return ['SUBMITTED', 'CONFIRMED'];
-            case 'DEFENDED':
-            case 'NOT_DEFENDED':
-                return [];
-            default:
-                throw new \InvalidArgumentException('Unknown status');
-        }
-    }
 }
diff --git a/backend/app/Models/Internship.php b/backend/app/Models/Internship.php
index 272b5f8..eb66005 100644
--- a/backend/app/Models/Internship.php
+++ b/backend/app/Models/Internship.php
@@ -2,6 +2,7 @@
 
 namespace App\Models;
 
+use App\Enums\InternshipStatus;
 use Carbon\Carbon;
 use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Model;
@@ -66,6 +67,58 @@ class Internship extends Model
         return $this->hasOne(InternshipStatusData::class, 'internship_id')->latestOfMany();
     }
 
+    public function nextStates(string $userRole)
+    {
+        $current_status = $this->status->status;
+        $report_confirmed = $this->report_confirmed;
+
+        // študent nemôže meniť stav
+        if ($userRole === 'STUDENT')
+            return [];
+
+        /*
+            nasledujúci platný stav je určený podľa:
+                - aktuálneho stavu
+                - roly používateľa, ktorý ide meniť stav
+                - či bol výkaz potvrdený firmou
+        */
+        return match (true) {
+            // prax bola iba vytvorená a ide ju meniť admin alebo firma
+            $current_status === InternshipStatus::SUBMITTED
+            => ['CONFIRMED_BY_COMPANY', 'DENIED_BY_COMPANY'],
+
+            // prax bola potvrdená firmou a ide ju meniť admin
+            $current_status === InternshipStatus::CONFIRMED_BY_COMPANY && $userRole === "ADMIN"
+            => ['CONFIRMED_BY_ADMIN', 'DENIED_BY_ADMIN'],
+
+            // prax bola potvrdená firmou a ide ju meniť firma
+            $current_status === InternshipStatus::CONFIRMED_BY_COMPANY && $userRole === "EMPLOYER"
+            => ['DENIED_BY_COMPANY'],
+
+            // prax bola zamietnutá firmou a ide ju meniť admin
+            $current_status === InternshipStatus::DENIED_BY_COMPANY && $userRole === "ADMIN"
+            => ['CONFIRMED_BY_COMPANY', 'SUBMITTED'],
+
+            // prax bola potvrdená garantom, ide ju meniť admin a výkaz bol potvrdený firmou
+            $current_status === InternshipStatus::CONFIRMED_BY_ADMIN && $userRole === "ADMIN" && $report_confirmed
+            => ['DENIED_BY_ADMIN', 'CONFIRMED_BY_COMPANY', 'DENIED_BY_COMPANY', 'DEFENDED', 'NOT_DEFENDED'],
+
+            // prax bola potvrdená garantom, ide ju meniť admin a výkaz nebol potvrdený firmou
+            $current_status === InternshipStatus::CONFIRMED_BY_ADMIN && $userRole === "ADMIN" && !$report_confirmed
+            => ['DENIED_BY_ADMIN', 'CONFIRMED_BY_COMPANY', 'DENIED_BY_COMPANY'],
+
+            // prax bola obhájená a ide ju meniť admin
+            $current_status === InternshipStatus::DEFENDED && $userRole === "ADMIN"
+            => ['NOT_DEFENDED'],
+
+            // prax nebola obhájená a ide ju meniť admin
+            $current_status === InternshipStatus::NOT_DEFENDED && $userRole === "ADMIN"
+            => ['DEFENDED'],
+
+            default => []
+        };
+    }
+
     /**
      * Prepare the model for JSON serialization.
      *