Show if there's a new version available on the admin dashboard #143

app/Facades/Utils.php

@@ -2,6 +2,7 @@
 
 namespace App\Facades;
 
+use GuzzleHttp\Client;
 use \Illuminate\Support\Facades\Facade;
 
 class Utils extends Facade
@@ -11,6 +12,33 @@ class Utils extends Facade
         return 'utils';
     }
 
+    /**
+     * Download a URI. If a file is given, it will save the downloaded
+     * content into that file
+     * @param $uri
+     * @param null $file
+     * @return string
+     * @throws \RuntimeException
+     */
+    public static function downloadUrl($uri, $file=null)
+    {
+        $opts = [];
+        if($file !== null) {
+            $opts['sink'] = $file;
+        }
+
+        $client = new Client();
+        $response = $client->request('GET', $uri, $opts);
+
+        $body = $response->getBody()->getContents();
+        if($response->getHeader('content-type') === 'application/json') {
+            $body = \GuzzleHttp\json_decode($body);
+        }
+
+        return $body;
+    }
+
+
     /**
      * Returns a 40 character API key that a user can use
      * @return string

app/Http/Controllers/Admin/DashboardController.php

@@ -3,12 +3,17 @@
 namespace App\Http\Controllers\Admin;
 
 use Auth;
+use Flash;
+use Version;
 use Illuminate\Http\Request;
 
+use App\Facades\Utils;
 use App\Repositories\NewsRepository;
 use App\Repositories\PirepRepository;
 use App\Repositories\UserRepository;
 
+use vierbergenlars\SemVer\version as semver;
+
 class DashboardController extends BaseController
 {
     private $newsRepo, $pirepRepo, $userRepo;
@@ -24,10 +29,29 @@ class DashboardController extends BaseController
     }
 
     /**
-     * Display a listing of the Airlines.
+     * Check if a new version is available by checking the VERSION file from
+     * S3 and then using the semver library to do the comparison. Just show
+     * a session flash file on this page that'll get cleared right away
+     * @throws \RuntimeException
+     */
+    protected function checkNewVersion()
+    {
+        $current_version = new semver(Version::compact());
+        $latest_version = new semver(Utils::downloadUrl(config('phpvms.version_file')));
+
+        if(semver::gt($latest_version, $current_version)) {
+            Flash::warning('New version '.$latest_version.' is available!');
+        }
+    }
+
+    /**
+     * Show the admin dashboard
+     * @throws \RuntimeException
      */
     public function index(Request $request)
     {
+        $this->checkNewVersion();
+
         return view('admin.dashboard.index', [
             'news' => $this->newsRepo->getLatest(),
             'pending_pireps' => $this->pirepRepo->getPendingCount(),