Add api to upload attachments

lib/Controller/AttachmentApiController.php

@@ -0,0 +1,74 @@
+<?php
+/*
+ * @copyright 2016-2020 Matias De lellis <mati86dl@gmail.com>
+ *
+ * @author 2016 Matias De lellis <mati86dl@gmail.com>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+namespace OCA\QuickNotes\Controller;
+
+use OCP\AppFramework\ApiController;
+use OCP\AppFramework\Http;
+use OCP\AppFramework\Http\JSONResponse;
+use OCP\AppFramework\Http\Response;
+
+use OCP\IRequest;
+
+use OCA\QuickNotes\Service\FileService;
+
+
+class AttachmentApiController extends ApiController {
+
+	private $fileService;
+	private $userId;
+
+	public function __construct($AppName,
+	                            IRequest    $request,
+	                            FileService $fileService,
+	                            $userId)
+	{
+		parent::__construct($AppName, $request);
+
+		$this->fileService = $fileService;
+		$this->userId      = $userId;
+	}
+
+	/**
+	 * @NoAdminRequired
+	 * @NoCSRFRequired
+	 *
+	 * @return JSONResponse
+	 */
+	public function upload() {
+		$files = $this->request->files;
+
+		if (count($files) !== 1) {
+			return new JSONResponse([],Http::STATUS_BAD_REQUEST);
+		}
+
+		$file = array_pop($files);
+
+		$fileId = $this->fileService->upload($file['name'], file_get_contents($file['tmp_name']));
+		return new JSONResponse([
+			'file_id'      => $fileId,
+			'preview_url'  => $this->fileService->getPreviewUrl($fileId, 512),
+			'redirect_url' => $this->fileService->getRedirectToFileUrl($fileId)
+		]);
+	}
+
+}