Added check for updates

Uses the version number in config/speedtest.php hosted on github

app/Helpers/UpdateHelper.php

@@ -7,7 +7,47 @@ use Exception;
 class UpdateHelper {
     public static function check()
     {
-        $current = config('app.version', false);
-        (!$current) ? false : '';
+        $current = config('speedtest.version', false);
+        if($current === false) {
+            return false;
+        }
+
+        $gitVersion = UpdateHelper::checkLatestVersion();
+        if($gitVersion === false) {
+            return false;
+        }
+
+        return (bool)(version_compare($current, $gitVersion['version']));
+    }
+
+    public static function checkLatestVersion()
+    {
+        $user = config('speedtest.user');
+        $repo = config('speedtest.repo');
+        $branch = config('speedtest.branch');
+
+        $url = 'https://raw.githubusercontent.com/'.$user
+                                                   .'/'
+                                                   .$repo
+                                                   .'/'
+                                                   .$branch
+                                                   .'/config/speedtest.php';
+
+        try {
+            $gitFile = file_get_contents($url);
+        } catch(Exception $e) {
+            return false;
+        }
+
+        $pattern = "/'version' => '([0-9]{1,}\.[0-9]{1,}\.[0-9]{1,})'/";
+        $version = [];
+        preg_match($pattern, $gitFile, $version);
+        $version = $version[1];
+
+        return [
+            'repo' => $user . '/' . $repo,
+            'branch' => $branch,
+            'version' => $version,
+        ];
     }
 }

app/Http/Controllers/UpdateController.php

@@ -10,6 +10,7 @@ class UpdateController extends Controller
     public function checkForUpdate()
     {
         return response()->json([
+            'method' => 'check for updates',
             'update' => UpdateHelper::check(),
         ], 200);
     }