CLOUD: Add IdStorage

This is a special base class for Storages which are using ids instead of
paths in their APIs, like Box or Google Drive.

This commit makes Box derived from IdStorage.

1 files changed, 129 insertions, 0 deletions

diff --git a/backends/cloud/id/idlistdirectoryrequest.cpp b/backends/cloud/id/idlistdirectoryrequest.cpp
new file mode 100644
index 0000000000..012065dc77
--- /dev/null
+++ b/backends/cloud/id/idlistdirectoryrequest.cpp
@@ -0,0 +1,129 @@
+/* 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.
+*
+*/
+
+#include "backends/cloud/id/idlistdirectoryrequest.h"
+#include "backends/cloud/id/idstorage.h"
+
+namespace Cloud {
+namespace Id {
+
+IdListDirectoryRequest::IdListDirectoryRequest(IdStorage *storage, Common::String path, Storage::ListDirectoryCallback cb, Networking::ErrorCallback ecb, bool recursive):
+	Networking::Request(nullptr, ecb),
+	_requestedPath(path), _requestedRecursive(recursive), _storage(storage), _listDirectoryCallback(cb),
+	_workingRequest(nullptr), _ignoreCallback(false) {
+	start();
+}
+
+IdListDirectoryRequest::~IdListDirectoryRequest() {
+	_ignoreCallback = true;
+	if (_workingRequest) _workingRequest->finish();
+	delete _listDirectoryCallback;
+}
+
+void IdListDirectoryRequest::start() {
+	//cleanup
+	_ignoreCallback = true;
+	if (_workingRequest) _workingRequest->finish();
+	_workingRequest = nullptr;
+	_files.clear();
+	_directoriesQueue.clear();
+	_currentDirectory = StorageFile();
+	_ignoreCallback = false;
+
+	//find out that directory's id
+	Storage::UploadCallback innerCallback = new Common::Callback<IdListDirectoryRequest, Storage::UploadResponse>(this, &IdListDirectoryRequest::idResolvedCallback);
+	Networking::ErrorCallback innerErrorCallback = new Common::Callback<IdListDirectoryRequest, Networking::ErrorResponse>(this, &IdListDirectoryRequest::idResolveErrorCallback);
+	_workingRequest = _storage->resolveFileId(_requestedPath, innerCallback, innerErrorCallback);
+}
+
+void IdListDirectoryRequest::idResolvedCallback(Storage::UploadResponse response) {
+	_workingRequest = nullptr;
+	if (_ignoreCallback) return;
+	if (response.request) _date = response.request->date();
+
+	StorageFile directory = response.value;
+	directory.setPath(_requestedPath);
+	_directoriesQueue.push_back(directory);
+	listNextDirectory();
+}
+
+void IdListDirectoryRequest::idResolveErrorCallback(Networking::ErrorResponse error) {
+	_workingRequest = nullptr;
+	if (_ignoreCallback) return;
+	if (error.request) _date = error.request->date();
+	finishError(error);
+}
+
+void IdListDirectoryRequest::listNextDirectory() {
+	if (_directoriesQueue.empty()) {
+		finishListing(_files);
+		return;
+	}
+
+	_currentDirectory = _directoriesQueue.back();
+	_directoriesQueue.pop_back();
+
+	Storage::FileArrayCallback callback = new Common::Callback<IdListDirectoryRequest, Storage::FileArrayResponse>(this, &IdListDirectoryRequest::listedDirectoryCallback);
+	Networking::ErrorCallback failureCallback = new Common::Callback<IdListDirectoryRequest, Networking::ErrorResponse>(this, &IdListDirectoryRequest::listedDirectoryErrorCallback);	
+	_workingRequest = _storage->listDirectoryById(_currentDirectory.id(), callback, failureCallback);
+}
+
+void IdListDirectoryRequest::listedDirectoryCallback(Storage::FileArrayResponse response) {
+	_workingRequest = nullptr;
+	if (_ignoreCallback) return;
+	if (response.request) _date = response.request->date();
+
+	for (uint32 i = 0; i < response.value.size(); ++i) {
+		StorageFile &file = response.value[i];
+		Common::String path = _currentDirectory.path();
+		if (path.size() && path.lastChar() != '/' && path.lastChar() != '\\') path += '/';
+		path += file.name();
+		file.setPath(path);
+		_files.push_back(file);
+		if (_requestedRecursive && file.isDirectory()) {
+			_directoriesQueue.push_back(file);
+		}
+	}
+
+	listNextDirectory();
+}
+
+void IdListDirectoryRequest::listedDirectoryErrorCallback(Networking::ErrorResponse error) {
+	_workingRequest = nullptr;
+	if (_ignoreCallback) return;
+	if (error.request) _date = error.request->date();
+	finishError(error);
+}
+
+void IdListDirectoryRequest::handle() {}
+
+void IdListDirectoryRequest::restart() { start(); }
+
+Common::String IdListDirectoryRequest::date() const { return _date; }
+
+void IdListDirectoryRequest::finishListing(Common::Array<StorageFile> &files) {
+	Request::finishSuccess();
+	if (_listDirectoryCallback) (*_listDirectoryCallback)(Storage::ListDirectoryResponse(this, files));
+}
+
+} // End of namespace Id
+} // End of namespace Cloud