/* 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 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

#include "backends/networking/sdl_net/handlers/uploadfilehandler.h"
#include "backends/networking/sdl_net/handlerutils.h"
#include "backends/networking/sdl_net/uploadfileclienthandler.h"
#include "backends/fs/fs-factory.h"
#include "common/system.h"
#include "common/translation.h"

namespace Networking {

UploadFileHandler::UploadFileHandler() {}

UploadFileHandler::~UploadFileHandler() {}

/// public

void UploadFileHandler::handle(Client &client) {
	Common::String path = client.queryParameter("path");

	// check that <path> is not an absolute root
	if (path == "" || path == "/" || path == "\\") {
		HandlerUtils::setFilesManagerErrorMessageHandler(client, Common::convertFromU32String(_("Invalid path!")));
		return;
	}

	// check that <path> contains no '../'
	if (HandlerUtils::hasForbiddenCombinations(path)) {
		HandlerUtils::setFilesManagerErrorMessageHandler(client, Common::convertFromU32String(_("Invalid path!")));
		return;
	}

	// transform virtual path to actual file system one
	Common::String prefixToRemove = "", prefixToAdd = "";
	if (!transformPath(path, prefixToRemove, prefixToAdd, false) || path.empty()) {
		HandlerUtils::setFilesManagerErrorMessageHandler(client, Common::convertFromU32String(_("Invalid path!")));
		return;
	}

	// check that <path> exists, is directory and isn't forbidden
	AbstractFSNode *node = g_system->getFilesystemFactory()->makeFileNodePath(path);
	if (!HandlerUtils::permittedPath(node->getPath())) {
		HandlerUtils::setFilesManagerErrorMessageHandler(client, Common::convertFromU32String(_("Invalid path!")));
		return;
	}
	if (!node->exists()) {
		HandlerUtils::setFilesManagerErrorMessageHandler(client, Common::convertFromU32String(_("The parent directory doesn't exist!")));
		return;
	}
	if (!node->isDirectory()) {
		HandlerUtils::setFilesManagerErrorMessageHandler(client, Common::convertFromU32String(_("Can't upload into a file!")));
		return;
	}

	// if all OK, set special handler
	client.setHandler(new UploadFileClientHandler(path));
}

} // End of namespace Networking
