added basic api for 3rd-party clients

lib/Controller/ApiController.php

@@ -0,0 +1,57 @@
+<?php
+
+namespace OCA\NCDownloader\Controller;
+
+use \OCP\AppFramework\ApiController as API;
+use \OCP\IRequest;
+use \OCP\AppFramework\Http\JSONResponse;
+use \OCP\IL10N;
+use OCA\NCDownloader\Controller\MainController as Main;
+use OCA\NCDownloader\Controller\YtdlController as YTD;
+use OCA\NCDownloader\Controller\SearchController as Search;
+
+class ApiController extends API
+{
+
+    private $IL10N;
+    private $ytdl;
+    private $main;
+    private $search;
+
+    public function __construct($appName, IRequest $request, IL10N $IL10N, YTD $ytdl, Main $main, Search $search)
+    {
+        $this->IL10N = $IL10N;
+        $this->main = $main;
+        $this->search = $search;
+        $this->ytdl = $ytdl;
+        parent::__construct($appName, $request);
+    }
+
+    /**
+     * @CORS
+     * @NoAdminRequired
+     * @NoCSRFRequired
+     */
+    public function download(string $url, string $type = "aria2", array $options = []): JSONResponse
+    {
+        if ($type == "aria2") {
+            return $this->main->Download($url);
+        } else if ($type == "ytdl") {
+            $extension = $options["extension"] ?? "mp4";
+            return $this->ytdl->Download($url, $extension);
+        } else if ($type == "bt") {
+            return $this->main->Upload();
+        }
+        return new JSONResponse(["error" => "Invalid download type"]);
+    }
+
+    /**
+     * @CORS
+     * @NoAdminRequired
+     * @NoCSRFRequired
+     */
+    public function search(string $keyword, string $site = "TPB"): JSONResponse
+    {
+        return $this->search->execute($keyword, $site);
+    }
+}