added options for tracking youtube-dl downloads;bugs fixing

lib/Tools/folderScan.php

@@ -0,0 +1,93 @@
+<?php
+namespace OCA\NCDownloader\Tools;
+
+use OCA\NCDownloader\Tools\Helper;
+use OCA\NCDownloader\Tools\Settings;
+use OC\Files\Utils\Scanner;
+use \OCP\EventDispatcher\IEventDispatcher;
+
+class folderScan
+{
+    private $user;
+    private $path;
+    public function __construct($path = null, $user = null)
+    {
+        $this->user = $user ?? \OC::$server->getUserSession()->getUser()->getUID();
+        $this->path = $path ?? $this->getDefaultPath();
+        $this->realDir = \OC::$server->getSystemConfig()->getValue('datadirectory') . "/" . $this->path;
+    }
+
+    public function getDefaultPath()
+    {
+        $settings = new Settings($this->user);
+        $rootFolder = Helper::getUserFolder($this->user);
+        $downloadDir = $settings->get('ncd_downloader_dir') ?? "/Downloads";
+        return $rootFolder . "/" . ltrim($downloadDir, '/\\');
+    }
+    public static function create($path = null, $user = null)
+    {
+        return new static($path, $user);
+    }
+
+    public function setUser($user)
+    {
+        $this->user = $user;
+        return $this;
+    }
+    public function setPath($path)
+    {
+        $this->path = $path;
+        return $this;
+    }
+
+    private function update()
+    {
+        if (!(self::folderUpdated($this->realDir))) {
+            return ['message' => "no change"];
+        }
+        $this->scan();
+        return ['message' => "changed"];
+    }
+//force update
+    public function scan()
+    {
+        $this->logger = \OC::$server->getLogger();
+        $this->scanner = new Scanner($this->user, \OC::$server->getDatabaseConnection(), \OC::$server->query(IEventDispatcher::class), $this->logger);
+        try {
+            $this->scanner->scan($this->path);
+            return ['status' => 'OK', 'path' => $this->path];
+        } catch (ForbiddenException $e) {
+            $this->logger->warning("Make sure you're running the scan command only as the user the web server runs as");
+        } catch (\Exception $e) {
+
+            $this->logger->warning("Exception during scan: " . $e->getMessage() . $e->getTraceAsString());
+        }
+        return ['status' => $e->getMessage(), 'path' => $this->path];
+
+    }
+    public static function folderUpdated($dir)
+    {
+        if (!file_exists($dir)) {
+            return false;
+        }
+        $checkFile = $dir . "/.lastmodified";
+        if (!file_exists($checkFile)) {
+            $time = \filemtime($dir);
+            file_put_contents($checkFile, $time);
+            return false;
+        }
+        $lastModified = (int) file_get_contents($checkFile);
+        $time = \filemtime($dir);
+        if ($time > $lastModified) {
+            file_put_contents($checkFile, $time);
+            return true;
+        }
+        return false;
+    }
+
+    //update only folder is modified
+    public static function sync($path = null, $user = null)
+    {
+        return self::create($path, $user)->update();
+    }
+}