improve months values

app/Http/Controllers/RainfallController.php

@@ -113,9 +113,17 @@ class RainfallController extends Controller
 
     public function lastMonths(Request $request)
     {
+        $lang = array_values(array_filter($request->getLanguages(), fn ($v) => str_contains($v, '_')))[0] ?? 'en_US';
+        setlocale(LC_TIME, $lang);
+        Carbon::setLocale(explode('_', $lang)[0]);
+
+        $firstOfLastYear = now()->subYear()->firstOfYear();
+        $diff = now()->diffInMonths($firstOfLastYear);
+
         $result = [];
-        for ($i = 12; $i >= 0; $i--) {
+        for ($i = $diff; $i >= 0; $i--) {
             $date = now()->subMonths($i);
+            $month = $date->month;
             $firstOfMonth = now()->subMonths($i)->firstOfMonth();
             $lastOfMonth = now()->subMonths($i)->lastOfMonth();
             $rainfalls = $request->user()
@@ -123,7 +131,11 @@ class RainfallController extends Controller
                 ->whereBetween('date', [$firstOfMonth, $lastOfMonth])
                 ->sum('value');
 
-            $result[] = [
+            if (! isset($result[$month])) {
+                $result[$month] = [];
+            }
+
+            $result[$month][] = [
                 'year' => $date->year,
                 'month' => $date->month,
                 'label' => $date->monthName.' '.$date->year,