fix enrollment for the new school-year

app/Controllers/View/FlagController.php

@@ -24,6 +24,13 @@ class FlagController extends Controller
         helper(['url', 'form']);
     }
 
+    private function assertSchoolYearNameWritable(string $schoolYear): void
+    {
+        service('schoolYearWriteGuard')->assertWritable(
+            service('schoolYearContext')->forYearName($schoolYear)
+        );
+    }
+
     public function index()
     {
         $currentFlagModel = new CurrentFlagModel();
@@ -436,6 +443,13 @@ class FlagController extends Controller
             return $this->index();
         }
 
+        $flagData = $currentFlagModel->find($id);
+        if (!$flagData) {
+            session()->setFlashdata('error', 'Incident not found.');
+            return $this->index();
+        }
+        $this->assertSchoolYearNameWritable((string)($flagData['school_year'] ?? ''));
+
         $update = ['flag_state' => $newState];
         if ($newState === 'Closed') {
             $update['updated_by_closed'] = $userId;
@@ -490,6 +504,7 @@ class FlagController extends Controller
             session()->setFlashdata('error', 'Incident not found.');
             return redirect()->back();
         }
+        $this->assertSchoolYearNameWritable((string)($flagData['school_year'] ?? ''));
 
         // Proceed only if flag is not closed
         if ($flagData['flag_state'] !== 'Closed') {
@@ -537,6 +552,7 @@ class FlagController extends Controller
             session()->setFlashdata('error', 'Incident not found.');
             return redirect()->back();
         }
+        $this->assertSchoolYearNameWritable((string)($flagData['school_year'] ?? ''));
 
         // Check if the flag is not already canceled
         if ($flagData['flag_state'] !== 'Canceled') {