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diff --git a/backends/cloud/id/idstorage.h b/backends/cloud/id/idstorage.h
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+/* ScummVM - Graphic Adventure Engine
+*
+* ScummVM is the legal property of its developers, whose names
+* are too numerous to list here. Please refer to the COPYRIGHT
+* file distributed with this source distribution.
+*
+* This program is free software; you can redistribute it and/or
+* modify it under the terms of the GNU General Public License
+* as published by the Free Software Foundation; either version 2
+* 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 General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with this program; if not, write to the Free Software
+* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+*
+*/
+
+#ifndef BACKENDS_CLOUD_ID_IDSTORAGE_H
+#define BACKENDS_CLOUD_ID_IDSTORAGE_H
+
+#include "backends/cloud/storage.h"
+#include "backends/networking/curl/curljsonrequest.h"
+
+/*
+ * Id::IdStorage is a special base class, which is created
+ * to simplify adding new storages which use ids instead of
+ * paths in their API.
+ *
+ * Some Requests are already implemented, and Storage based
+ * on IdStorage needs to override/implement a few basic things.
+ *
+ * For example, ListDirectoryRequest and ResolveIdRequests are
+ * based on listDirectoryById() and getRootDirectoryId() methods.
+ * Implementing these you'll get id resolving and directory
+ * listing by path.
+ */
+
+namespace Cloud {
+namespace Id {
+
+class IdStorage: public Cloud::Storage {
+protected:
+	void printJson(Networking::JsonResponse response);
+	void printFiles(FileArrayResponse response);
+	void printBool(BoolResponse response);
+	void printFile(UploadResponse response);
+
+	ListDirectoryCallback getPrintFilesCallback();
+	
+public:
+	virtual ~IdStorage();
+
+	/** Public Cloud API comes down there. */
+
+	/** Returns StorageFile with the resolved file's id. */
+	virtual Networking::Request *resolveFileId(Common::String path, UploadCallback callback, Networking::ErrorCallback errorCallback);
+
+	/** Returns ListDirectoryStatus struct with list of files. */
+	virtual Networking::Request *listDirectory(Common::String path, ListDirectoryCallback callback, Networking::ErrorCallback errorCallback, bool recursive = false);
+	virtual Networking::Request *listDirectoryById(Common::String id, ListDirectoryCallback callback, Networking::ErrorCallback errorCallback) = 0;
+
+	virtual Common::String getRootDirectoryId() = 0;
+};
+
+} // End of namespace Id
+} // End of namespace Cloud
+
+#endif