fix(perf): resolve F-11 — cap PDF exports to 90-day date range to prevent memory exhaustion

All three PDF exports (rainfall, water level, siren) now default to
last 90 days. Accepts optional ?from=&to= query params, capped at
90-day max range. Shared applyDateRange helper in NotificationController.

src/app/Http/Controllers/NotificationController.php

@@ -4,6 +4,7 @@ namespace App\Http\Controllers;
 
 use Illuminate\Http\Request;
 use Illuminate\Support\Facades\DB;
+use Carbon\Carbon;
 
 // Add This For Import DOMPDF Library
 use Barryvdh\DomPDF\Facade\Pdf;
@@ -88,34 +89,54 @@ class NotificationController extends Controller
     }
 
     //Function Export PDF for Rainfall History
-    public function exportHistoryRfPDF()
+    public function exportHistoryRfPDF(Request $request)
     {
-         $rfHistory = DB::table('station')
+        $query = DB::table('station')
-        ->join('notification','station.stationid','notification.stationid')
+            ->join('notification', 'station.stationid', 'notification.stationid')
-        ->select('station.*','notification.*')
+            ->select('station.*', 'notification.*')
-        ->where('notification.stationtype',1)
+            ->where('notification.stationtype', 1);
-        ->orderByDesc('notification.timestamp')->get();
 
-        $pdf = Pdf::loadView('pdf.rfhistory',compact('rfHistory'))
+        $this->applyDateRange($query, $request, 'notification.timestamp');
-        ->setPaper('a4','portrait');
+
+        $rfHistory = $query->orderByDesc('notification.timestamp')->get();
+
+        $pdf = Pdf::loadView('pdf.rfhistory', compact('rfHistory'))
+            ->setPaper('a4', 'portrait');
 
         return $pdf->download('Rainfall Alarm History.pdf');
-
     }
 
-    // Function Export PDF for Water Level History
+    public function exportHistoryWlPDF(Request $request)
-    public function exportHistoryWlPDF()
     {
-        $wlHistory = DB::table('station')
+        $query = DB::table('station')
-        ->join('notification','station.stationid','notification.stationid')
+            ->join('notification', 'station.stationid', 'notification.stationid')
-        ->select('station.*','notification.*')
+            ->select('station.*', 'notification.*')
-        ->where('notification.stationtype',2)
+            ->where('notification.stationtype', 2);
-        ->orderByDesc('notification.timestamp')->get();
 
-        $pdf = Pdf::loadView('pdf.wlhistory',compact('wlHistory'))
+        $this->applyDateRange($query, $request, 'notification.timestamp');
-        ->setPaper('a4','portrait');
+
+        $wlHistory = $query->orderByDesc('notification.timestamp')->get();
+
+        $pdf = Pdf::loadView('pdf.wlhistory', compact('wlHistory'))
+            ->setPaper('a4', 'portrait');
 
         return $pdf->download('Water Level Alarm History.pdf');
+    }
 
+    private function applyDateRange($query, Request $request, string $column): void
+    {
+        $maxDays = 90;
+
+        if ($request->filled('from') && $request->filled('to')) {
+            $from = Carbon::parse($request->input('from'))->startOfDay();
+            $to = Carbon::parse($request->input('to'))->endOfDay();
+            $diff = $from->diffInDays($to);
+            if ($diff > $maxDays) {
+                $from = $to->copy()->subDays($maxDays);
+            }
+            $query->whereBetween($column, [$from, $to]);
+        } else {
+            $query->where($column, '>=', now()->subDays($maxDays));
+         }
     }
 }

src/app/Http/Controllers/SirenController.php

@@ -5,6 +5,7 @@ namespace App\Http\Controllers;
 use Illuminate\Http\Request;
 use Illuminate\Support\Facades\DB;
 use Barryvdh\DomPDF\Facade\Pdf;
+use Carbon\Carbon;
 
 
 class SirenController extends Controller
@@ -54,26 +55,36 @@ class SirenController extends Controller
     }
 
     // Function for download Siren History to PDF
-    public function exportHistorySirenPDF()
+    public function exportHistorySirenPDF(Request $request)
     {
-        $sirenHistory = DB::table('station')
+        $maxDays = 90;
-        ->join('siren','station.stationid','siren.stationid')
+        $query = DB::table('station')
-        ->select('station.*','siren.*')
+            ->join('siren', 'station.stationid', 'siren.stationid')
+            ->select('station.*', 'siren.*')
             ->where('siren.level', '!=', 'N')
             ->where('siren.level', '!=', '')
-        ->where('station.siren',1)   
+            ->where('station.siren', 1);
-        ->orderByDesc('siren.active_time')
-        ->get();
 
-        $pdf = Pdf::loadView('pdf.sirenhistory',compact('sirenHistory'))
+        if ($request->filled('from') && $request->filled('to')) {
-        ->setPaper('a4','portrait');
+            $from = Carbon::parse($request->input('from'))->startOfDay();
+            $to = Carbon::parse($request->input('to'))->endOfDay();
+            if ($from->diffInDays($to) > $maxDays) {
+                $from = $to->copy()->subDays($maxDays);
+            }
+            $query->whereBetween('siren.active_time', [$from, $to]);
+        } else {
+            $query->where('siren.active_time', '>=', now()->subDays($maxDays));
+        }
+
+        $sirenHistory = $query->orderByDesc('siren.active_time')->get();
+
+        $pdf = Pdf::loadView('pdf.sirenhistory', compact('sirenHistory'))
+            ->setPaper('a4', 'portrait');
 
         return $pdf->download(
             'Station_Siren_History.pdf',
             [],
             ['Content-Type' => 'application/pdf']
         );
-
-
     }
 }