Add statistics widget to admin dashboard

app/Http/Controllers/Admin/AdminPageController.php

@@ -3,14 +3,81 @@
 namespace App\Http\Controllers\Admin;
 
 use App\Http\Controllers\BasePageController;
+use App\Services\UserStatsService;
 
 class AdminPageController extends BasePageController
 {
+    protected UserStatsService $userStatsService;
+
+    public function __construct(UserStatsService $userStatsService)
+    {
+        parent::__construct();
+        $this->userStatsService = $userStatsService;
+    }
+
     /**
      * @throws \Exception
      */
     public function index()
     {
-        return $this->adminBasePage();
+        $this->setAdminPrefs();
+
+        // Get user statistics
+        $userStats = [
+            'users_by_role' => $this->userStatsService->getUsersByRole(),
+            'downloads_per_day' => $this->userStatsService->getDownloadsPerDay(7),
+            'api_hits_per_day' => $this->userStatsService->getApiHitsPerDay(7),
+            'summary' => $this->userStatsService->getSummaryStats(),
+            'top_downloaders' => $this->userStatsService->getTopDownloaders(5),
+        ];
+
+        return view('admin.dashboard', array_merge($this->viewData, [
+            'meta_title' => 'Admin Home',
+            'meta_description' => 'Admin home page',
+            'userStats' => $userStats,
+            'stats' => $this->getDefaultStats(),
+        ]));
+    }
+
+    /**
+     * Get default dashboard statistics
+     *
+     * @return array
+     */
+    protected function getDefaultStats(): array
+    {
+        $today = now()->format('Y-m-d');
+
+        return [
+            'releases' => \App\Models\Release::count(),
+            'releases_today' => \App\Models\Release::whereRaw('DATE(adddate) = ?', [$today])->count(),
+            'users' => \App\Models\User::whereNull('deleted_at')->count(),
+            'users_today' => \App\Models\User::whereRaw('DATE(created_at) = ?', [$today])->count(),
+            'groups' => \App\Models\UsenetGroup::count(),
+            'active_groups' => \App\Models\UsenetGroup::where('active', 1)->count(),
+            'failed' => \App\Models\DnzbFailure::count(),
+            'disk_free' => $this->getDiskSpace(),
+        ];
+    }
+
+    /**
+     * Get disk space information
+     *
+     * @return string
+     */
+    protected function getDiskSpace(): string
+    {
+        try {
+            $bytes = disk_free_space('/');
+            $units = ['B', 'KB', 'MB', 'GB', 'TB'];
+
+            for ($i = 0; $bytes > 1024 && $i < count($units) - 1; $i++) {
+                $bytes /= 1024;
+            }
+
+            return round($bytes, 2) . ' ' . $units[$i];
+        } catch (\Exception $e) {
+            return 'N/A';
+        }
     }
 }