CLOUD: Add Cloud::Manager and Cloud::Storage

This commit introduces Common::CloudManager, which can be accessed from
OSystem.

The backend for this manager is Cloud::Manager (defined in
backends/cloud/manager.h). It should load all users storages from
configs and provide access to current Storage instance. For now it just
creates a new one.

Cloud::Storage (backends/cloud/storage.h) provides an API to interact
with cloud storage, for example, create new directory or sync files.
Right now it's not ready and has only two dummy methods: listDirectory()
and syncSaves().

There is Cloud::Dropbox::DropboxStorage backend
(backends/cloud/dropbox/dropboxstorage.h) for Cloud::Storage. Right now
it implements both listDirectory() and syncSaves() with starting timer
task and handling it by printing out some JSON examples.

6 files changed, 217 insertions, 28 deletions

diff --git a/backends/cloud/cloudthread.cpp b/backends/cloud/dropbox/dropboxstorage.cpp
index 813354f43f..b841575bf6 100644
--- a/backends/cloud/cloudthread.cpp
+++ b/backends/cloud/dropbox/dropboxstorage.cpp
@@ -20,22 +20,17 @@
 *
 */
 
-#include "cloudthread.h"
+#include "backends/cloud/dropbox/dropboxstorage.h"
 #include "common/debug.h"
 #include "common/json.h"
-#include "common/system.h"
-#include "common/timer.h"
 
 void example1();
 void example2();
 void example3();
 
-void cloudThread(void *thread) {
-	CloudThread *cloudThread = (CloudThread *)thread;
-	cloudThread->handler();
-};
+namespace Cloud { namespace Dropbox {
 
-void CloudThread::handler() {
+void DropboxStorage::handler() {
 	if (_firstTime) {
 		_firstTime = false;
 
@@ -45,21 +40,16 @@ void CloudThread::handler() {
 	} else { }
 }
 
-void CloudThread::setTimeout(int interval) {
-	Common::TimerManager *manager = g_system->getTimerManager();
-	if (!manager->installTimerProc(cloudThread, interval, this, "Cloud Thread"))
-		warning("Failed to create cloud thread");
-}
-
-void CloudThread::unsetTimeout() {
-	Common::TimerManager *manager = g_system->getTimerManager();
-	manager->removeTimerProc(cloudThread);
+void DropboxStorage::listDirectory(Common::String path) {
+	setTimeout(1000000); //in one second
 }
 
-void CloudThread::start() {
+void DropboxStorage::syncSaves() {
 	setTimeout(1000000); //in one second
 }
 
+} } //end of namespace Cloud::Dropbox
+
 /// SimpleJSON examples:
 
 using Common::JSON;
diff --git a/backends/cloud/dropbox/dropboxstorage.h b/backends/cloud/dropbox/dropboxstorage.h
new file mode 100644
index 0000000000..43ed9dcbee
--- /dev/null
+++ b/backends/cloud/dropbox/dropboxstorage.h
@@ -0,0 +1,45 @@
+/* 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_DROPBOX_STORAGE_H
+#define BACKENDS_CLOUD_DROPBOX_STORAGE_H
+
+#include "backends/cloud/storage.h"
+
+namespace Cloud { namespace Dropbox {
+
+class DropboxStorage: public Cloud::Storage {
+	bool _firstTime;
+
+protected:
+	virtual void handler();
+
+public:
+	DropboxStorage() : _firstTime(true) {};
+
+	virtual void listDirectory(Common::String path);
+	virtual void syncSaves();
+};
+
+} }  //end of namespace Cloud::Dropbox
+
+#endif
diff --git a/backends/cloud/manager.cpp b/backends/cloud/manager.cpp
new file mode 100644
index 0000000000..05b23771b0
--- /dev/null
+++ b/backends/cloud/manager.cpp
@@ -0,0 +1,41 @@
+/* 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/manager.h"
+#include "backends/cloud/dropbox/dropboxstorage.h"
+
+namespace Cloud {
+
+Manager::Manager(): _currentStorage(new Dropbox::DropboxStorage()) {};
+
+Manager::~Manager() { delete _currentStorage; }
+
+Storage* Manager::getCurrentStorage() {
+	return _currentStorage;
+}
+
+void Manager::syncSaves() {
+	Storage* storage = getCurrentStorage();
+	if (storage) storage->syncSaves();
+}
+
+} //end of namespace Cloud
\ No newline at end of file
diff --git a/backends/cloud/cloudthread.h b/backends/cloud/manager.h
index 334a163dde..11cc595da4 100644
--- a/backends/cloud/cloudthread.h
+++ b/backends/cloud/manager.h
@@ -20,22 +20,25 @@
 *
 */
 
-#ifndef BACKENDS_CLOUD_CLOUDTHREAD_H
-#define BACKENDS_CLOUD_CLOUDTHREAD_H
+#ifndef BACKENDS_CLOUD_MANAGER_H
+#define BACKENDS_CLOUD_MANAGER_H
 
-class CloudThread {
-	friend void cloudThread(void*); //calls private handler()
+#include "common/cloudmanager.h"
+#include "common/str.h"
 
-	bool _firstTime;
+namespace Cloud {
 
-	void handler();
-	void setTimeout(int interval);
-	void unsetTimeout();
+class Manager: public Common::CloudManager {
+	Storage* _currentStorage;
 
 public:
-	CloudThread(): _firstTime(true) {};
+	Manager();
+	virtual ~Manager();
 
-	void start();
+	virtual Storage* getCurrentStorage();
+	virtual void syncSaves();
 };
 
+} //end of namespace Cloud
+
 #endif
diff --git a/backends/cloud/storage.cpp b/backends/cloud/storage.cpp
new file mode 100644
index 0000000000..3272ecf760
--- /dev/null
+++ b/backends/cloud/storage.cpp
@@ -0,0 +1,49 @@
+/* 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/storage.h"
+#include "common/system.h"
+#include "common/timer.h"
+
+namespace Cloud {
+
+void cloudThread(void *thread) {
+	Storage *cloudThread = (Storage *)thread;
+	cloudThread->handler();
+}
+
+void Storage::handler() {
+	unsetTimeout();
+}
+
+void Storage::setTimeout(int interval) {
+	Common::TimerManager *manager = g_system->getTimerManager();
+	if (!manager->installTimerProc(cloudThread, interval, this, "Cloud Thread"))
+		; // warning("Failed to create cloud thread");
+}
+
+void Storage::unsetTimeout() {
+	Common::TimerManager *manager = g_system->getTimerManager();
+	manager->removeTimerProc(cloudThread);
+}
+
+} //end of namespace Cloud
diff --git a/backends/cloud/storage.h b/backends/cloud/storage.h
new file mode 100644
index 0000000000..4afa36f8d8
--- /dev/null
+++ b/backends/cloud/storage.h
@@ -0,0 +1,61 @@
+/* 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_STORAGE_H
+#define BACKENDS_CLOUD_STORAGE_H
+
+#include "common/str.h"
+
+namespace Cloud {
+
+class Storage {
+	friend void cloudThread(void*); //calls handler()
+
+protected:
+	virtual void handler();
+	virtual void setTimeout(int interval);
+	virtual void unsetTimeout();
+
+public:
+	Storage() {};
+	virtual ~Storage() {};
+
+	/**
+	* Lists given directory.
+	*
+	* @param path		directory to list	
+	*/
+
+	//TODO: actually make it list directories and some callback to pass gathered files list
+
+	virtual void listDirectory(Common::String path) = 0;
+
+	/**
+	* Starts saves syncing process.
+	*/
+
+	virtual void syncSaves() = 0;
+};
+
+} //end of namespace Cloud
+
+#endif