some changes for search

lib/Search/siteSearch.php

@@ -0,0 +1,45 @@
+<?php
+
+namespace OCA\NCDownloader\Search;
+
+require __DIR__ . "/../../vendor/autoload.php";
+use OCP\AppFramework\QueryException;
+use OCP\IServerContainer;
+use Symfony\Component\HttpClient\Exception\ClientException;
+
+class siteSearch
+{
+    public $container;
+    private $site = null;
+    private $defaultSite = __NAMESPACE__ . '\Sites\TPB';
+    public function __construct()
+    {
+        $this->container = \OC::$server->query(IServerContainer::class);
+        $this->site = __NAMESPACE__ . '\Sites\TPB';
+    }
+    public function go($keyword): array
+    {
+        try {
+            $siteInst = $this->container->query($this->site);
+        } catch (QueryException $e) {
+            $siteInst = $this->container->query($this->defaultSite);
+        } catch (ClientException $e) {
+            return ['message', $e->getMessage()];
+        }
+        $result = $siteInst->search($keyword);
+        if ($result->hasError()) {
+            return ['error' => $result->getError()];
+        }
+        return $result->getData();
+    }
+
+    public function setSite($site)
+    {
+        if (strpos($site, '\\') !== false) {
+            $this->site = $site;
+        } else {
+            $this->site = __NAMESPACE__ . '\Sites\\' . $site;
+        }
+    }
+
+}