added experimental support for a music site

lib/Search/Sites/sliderkz.php

@@ -0,0 +1,65 @@
+<?php
+
+namespace OCA\NCDownloader\Search\Sites;
+use OCA\NCDownloader\Tools\Helper;
+
+//slider.kz
+class sliderkz extends searchBase
+{
+    public $baseUrl = "https://slider.kz/vk_auth.php";
+    protected $query = null;
+    protected $tableTitles = [];
+
+    public function __construct($client)
+    {
+        $this->client = $client;
+    }
+    public function search(string $keyword): array
+    {
+        $this->query = ['q' => trim($keyword)];
+        $this->searchUrl = $this->baseUrl;
+        $this->getItems()->setTableTitles(["Title", "Duration", "Actions"])->addActionLinks(null);
+        return ["title" => $this->getTableTitles(), 'row' => $this->getRows()];
+    }
+
+    public function getItems()
+    {
+        $data = $this->getResponse();
+        $this->rows = $this->transformResp($data);
+        return $this;
+    }
+    protected function getDownloadUrl(array $item): string
+    {
+        extract($item);
+        return sprintf("https://slider.kz/download/%s/%s/%s/%s.mp3?extra=null", $id, $duration, $url, urlencode($tit_art));
+    }
+
+    private function transformResp($data): array
+    {
+        $items = [];
+        if (count($data) < 1) {
+            return [];
+        }
+        foreach ($data as $item) {
+            $items[] = array("title" => $item["tit_art"], "data-link" => $this->getDownloadUrl($item), "duration" => Helper::formatInterval($item["duration"]));
+        }
+        unset($data);
+        return $items;
+    }
+
+    public function getResponse(): array
+    {
+
+        try {
+            $response = $this->client->request('GET', $this->searchUrl, ['query' => $this->query]);
+            $resp = $response->toArray();
+        } catch (ExceptionInterface $e) {
+            return ["error" => $e->getMessage()];
+        }
+        if (isset($resp['audios'])) {
+            return array_values($resp["audios"])[0];
+        }
+
+        return [];
+    }
+}