[Feature] Display next speedtest run at date on dashboard (alexjustesen#1477)

Author: alexjustesen

app/Filament/Pages/Dashboard.php

@@ -11,6 +11,8 @@
 use App\Filament\Widgets\RecentUploadChartWidget;
 use App\Filament\Widgets\RecentUploadLatencyChartWidget;
 use App\Filament\Widgets\StatsOverviewWidget;
+use Carbon\Carbon;
+use Cron\CronExpression;
 use Filament\Actions\Action;
 use Filament\Actions\ActionGroup;
 use Filament\Notifications\Notification;
@@ -24,6 +26,19 @@ class Dashboard extends BasePage
 
     protected static string $view = 'filament.pages.dashboard';
 
+    public function getSubheading(): ?string
+    {
+        if (blank(config('speedtest.schedule'))) {
+            return __('No speedtests scheduled.');
+        }
+
+        $cronExpression = new CronExpression(config('speedtest.schedule'));
+
+        $nextRunDate = Carbon::parse($cronExpression->getNextRunDate(timeZone: config('app.display_timezone')))->format(config('app.datetime_format'));
+
+        return 'Next speedtest at: '.$nextRunDate;
+    }
+
     protected function getHeaderActions(): array
     {
         return [