CLOUD: Ask user to manually enable Storage

For more security, newly connected Storage only gets username/used space
information and is disabled until user manually presses the button.

16 files changed, 114 insertions, 24 deletions

diff --git a/backends/cloud/basestorage.cpp b/backends/cloud/basestorage.cpp
index ea54a97fd9..074c8596ec 100644
--- a/backends/cloud/basestorage.cpp
+++ b/backends/cloud/basestorage.cpp
@@ -32,8 +32,10 @@ namespace Cloud {
 
 BaseStorage::BaseStorage() {}
 
-BaseStorage::BaseStorage(Common::String token, Common::String refreshToken):
-	_token(token), _refreshToken(refreshToken) {}
+BaseStorage::BaseStorage(Common::String token, Common::String refreshToken, bool enabled):
+	_token(token), _refreshToken(refreshToken) {
+	_isEnabled = enabled; 
+}
 
 BaseStorage::~BaseStorage() {}
 
@@ -212,4 +214,20 @@ void BaseStorage::tokenRefreshed(BoolCallback callback, Networking::JsonResponse
 	delete callback;
 }
 
+void BaseStorage::saveIsEnabledFlag(const Common::String &keyPrefix) const {
+	ConfMan.set(keyPrefix + "enabled", _isEnabled ? "true" : "false", ConfMan.kCloudDomain);
+}
+
+bool BaseStorage::loadIsEnabledFlag(const Common::String &keyPrefix) {
+	if (!ConfMan.hasKey(keyPrefix + "enabled", ConfMan.kCloudDomain))
+		return false;
+
+	Common::String enabled = ConfMan.get(keyPrefix + "enabled", ConfMan.kCloudDomain);
+	return (enabled == "true");
+}
+
+void BaseStorage::removeIsEnabledFlag(const Common::String &keyPrefix) {
+	ConfMan.removeKey(keyPrefix + "enabled", ConfMan.kCloudDomain);
+}
+
 } // End of namespace Cloud
diff --git a/backends/cloud/basestorage.h b/backends/cloud/basestorage.h
index aae1a6ec2f..de287fcba3 100644
--- a/backends/cloud/basestorage.h
+++ b/backends/cloud/basestorage.h
@@ -77,9 +77,19 @@ protected:
 private:
 	void tokenRefreshed(BoolCallback callback, Networking::JsonResponse response);
 
+protected:
+	/** Helper function to save Storage::_isEnabled into config. */
+	void saveIsEnabledFlag(const Common::String &keyPrefix) const;
+
+	/** Helper function to load Storage::_isEnabled value from config. */
+	static bool loadIsEnabledFlag(const Common::String &keyPrefix);
+
+	/** Helper function to remove Storage::_isEnabled from config. */
+	static void removeIsEnabledFlag(const Common::String &keyPrefix);
+
 public:
 	BaseStorage();
-	BaseStorage(Common::String token, Common::String refreshToken);
+	BaseStorage(Common::String token, Common::String refreshToken, bool enabled = false);
 	virtual ~BaseStorage();
 
 	/**
diff --git a/backends/cloud/box/boxstorage.cpp b/backends/cloud/box/boxstorage.cpp
index 13046a08e0..46af2e56be 100644
--- a/backends/cloud/box/boxstorage.cpp
+++ b/backends/cloud/box/boxstorage.cpp
@@ -42,8 +42,8 @@ namespace Box {
 #define BOX_API_FILES_CONTENT "https://api.box.com/2.0/files/%s/content"
 #define BOX_API_USERS_ME "https://api.box.com/2.0/users/me"
 
-BoxStorage::BoxStorage(Common::String token, Common::String refreshToken):
-	IdStorage(token, refreshToken) {}
+BoxStorage::BoxStorage(Common::String token, Common::String refreshToken, bool enabled):
+	IdStorage(token, refreshToken, enabled) {}
 
 BoxStorage::BoxStorage(Common::String code, Networking::ErrorCallback cb) {
 	getAccessToken(code, cb);
@@ -62,6 +62,7 @@ bool BoxStorage::canReuseRefreshToken() { return false; }
 void BoxStorage::saveConfig(Common::String keyPrefix) {
 	ConfMan.set(keyPrefix + "access_token", _token, ConfMan.kCloudDomain);
 	ConfMan.set(keyPrefix + "refresh_token", _refreshToken, ConfMan.kCloudDomain);
+	saveIsEnabledFlag(keyPrefix);
 }
 
 Common::String BoxStorage::name() const {
@@ -224,12 +225,13 @@ BoxStorage *BoxStorage::loadFromConfig(Common::String keyPrefix) {
 
 	Common::String accessToken = ConfMan.get(keyPrefix + "access_token", ConfMan.kCloudDomain);
 	Common::String refreshToken = ConfMan.get(keyPrefix + "refresh_token", ConfMan.kCloudDomain);
-	return new BoxStorage(accessToken, refreshToken);
+	return new BoxStorage(accessToken, refreshToken, loadIsEnabledFlag(keyPrefix));
 }
 
 void BoxStorage::removeFromConfig(Common::String keyPrefix) {
 	ConfMan.removeKey(keyPrefix + "access_token", ConfMan.kCloudDomain);
 	ConfMan.removeKey(keyPrefix + "refresh_token", ConfMan.kCloudDomain);
+	removeIsEnabledFlag(keyPrefix);
 }
 
 Common::String BoxStorage::getRootDirectoryId() {
diff --git a/backends/cloud/box/boxstorage.h b/backends/cloud/box/boxstorage.h
index ce77192bfa..1916c88449 100644
--- a/backends/cloud/box/boxstorage.h
+++ b/backends/cloud/box/boxstorage.h
@@ -31,7 +31,7 @@ namespace Box {
 
 class BoxStorage: public Id::IdStorage {
 	/** This private constructor is called from loadFromConfig(). */
-	BoxStorage(Common::String token, Common::String refreshToken);
+	BoxStorage(Common::String token, Common::String refreshToken, bool enabled);
 
 	/** Constructs StorageInfo based on JSON response from cloud. */
 	void infoInnerCallback(StorageInfoCallback outerCallback, Networking::JsonResponse json);
diff --git a/backends/cloud/cloudmanager.cpp b/backends/cloud/cloudmanager.cpp
index a3e9856455..38089db0e9 100644
--- a/backends/cloud/cloudmanager.cpp
+++ b/backends/cloud/cloudmanager.cpp
@@ -159,7 +159,6 @@ void CloudManager::replaceStorage(Storage *storage, uint32 index) {
 	//do what should be done on first Storage connect
 	if (_activeStorage) {
 		_activeStorage->info(nullptr, nullptr); //automatically calls setStorageUsername()
-		_activeStorage->syncSaves(nullptr, nullptr);
 	}
 }
 
@@ -365,6 +364,21 @@ bool CloudManager::canSyncFilename(const Common::String &filename) const {
 	return true;
 }
 
+bool CloudManager::isStorageEnabled() const {
+	Storage *storage = getCurrentStorage();
+	if (storage)
+		return storage->isEnabled();
+	return false;
+}
+
+void CloudManager::enableStorage() {
+	Storage *storage = getCurrentStorage();
+	if (storage) {
+		storage->enable();
+		save();
+	}
+}
+
 SavesSyncRequest *CloudManager::syncSaves(Storage::BoolCallback callback, Networking::ErrorCallback errorCallback) {
 	Storage *storage = getCurrentStorage();
 	if (storage) {
diff --git a/backends/cloud/cloudmanager.h b/backends/cloud/cloudmanager.h
index ebcc6ea5cf..2d6c0bad43 100644
--- a/backends/cloud/cloudmanager.h
+++ b/backends/cloud/cloudmanager.h
@@ -230,6 +230,12 @@ public:
 	/** Returns whether given filename could be uploaded to or downloaded from storage. */
 	bool canSyncFilename(const Common::String &filename) const;
 
+	/** Returns whether current Storage is manually enabled by user (or false, if there is no active Storage). */
+	bool isStorageEnabled() const;
+
+	/** Sets Storage::_isEnabled to true and updates the config. */
+	void enableStorage();
+
 	/**
 	 * Starts saves syncing process in currently active storage if there is any.
 	 */
diff --git a/backends/cloud/dropbox/dropboxstorage.cpp b/backends/cloud/dropbox/dropboxstorage.cpp
index 5d8b9e0425..7edc609969 100644
--- a/backends/cloud/dropbox/dropboxstorage.cpp
+++ b/backends/cloud/dropbox/dropboxstorage.cpp
@@ -40,7 +40,7 @@ namespace Dropbox {
 
 #define DROPBOX_API_FILES_DOWNLOAD "https://content.dropboxapi.com/2/files/download"
 
-DropboxStorage::DropboxStorage(Common::String accessToken, bool unused): BaseStorage(accessToken, "") {}
+DropboxStorage::DropboxStorage(Common::String accessToken, bool enabled): BaseStorage(accessToken, "", enabled) {}
 
 DropboxStorage::DropboxStorage(Common::String code, Networking::ErrorCallback cb): BaseStorage() {
 	getAccessToken(code, cb);
@@ -58,6 +58,7 @@ bool DropboxStorage::canReuseRefreshToken() { return false; }
 
 void DropboxStorage::saveConfig(Common::String keyPrefix) {
 	ConfMan.set(keyPrefix + "access_token", _token, ConfMan.kCloudDomain);
+	saveIsEnabledFlag(keyPrefix);
 }
 
 Common::String DropboxStorage::name() const {
@@ -108,12 +109,13 @@ DropboxStorage *DropboxStorage::loadFromConfig(Common::String keyPrefix) {
 		return nullptr;
 	}
 
-	Common::String accessToken = ConfMan.get(keyPrefix + "access_token", ConfMan.kCloudDomain);
-	return new DropboxStorage(accessToken, true);
+	Common::String accessToken = ConfMan.get(keyPrefix + "access_token", ConfMan.kCloudDomain);	
+	return new DropboxStorage(accessToken, loadIsEnabledFlag(keyPrefix));
 }
 
 void DropboxStorage::removeFromConfig(Common::String keyPrefix) {
 	ConfMan.removeKey(keyPrefix + "access_token", ConfMan.kCloudDomain);
+	removeIsEnabledFlag(keyPrefix);
 }
 
 } // End of namespace Dropbox
diff --git a/backends/cloud/dropbox/dropboxstorage.h b/backends/cloud/dropbox/dropboxstorage.h
index 0b76bb5c4a..c6a1374357 100644
--- a/backends/cloud/dropbox/dropboxstorage.h
+++ b/backends/cloud/dropbox/dropboxstorage.h
@@ -32,7 +32,7 @@ namespace Dropbox {
 
 class DropboxStorage: public Cloud::BaseStorage {
 	/** This private constructor is called from loadFromConfig(). */
-	DropboxStorage(Common::String token, bool unused);
+	DropboxStorage(Common::String token, bool enabled);
 
 protected:
 	/**
diff --git a/backends/cloud/googledrive/googledrivestorage.cpp b/backends/cloud/googledrive/googledrivestorage.cpp
index a6e17e6ad3..2049d808c4 100644
--- a/backends/cloud/googledrive/googledrivestorage.cpp
+++ b/backends/cloud/googledrive/googledrivestorage.cpp
@@ -43,8 +43,8 @@ namespace GoogleDrive {
 #define GOOGLEDRIVE_API_FILES "https://www.googleapis.com/drive/v3/files"
 #define GOOGLEDRIVE_API_ABOUT "https://www.googleapis.com/drive/v3/about?fields=storageQuota,user"
 
-GoogleDriveStorage::GoogleDriveStorage(Common::String token, Common::String refreshToken):
-	IdStorage(token, refreshToken) {}
+GoogleDriveStorage::GoogleDriveStorage(Common::String token, Common::String refreshToken, bool enabled):
+	IdStorage(token, refreshToken, enabled) {}
 
 GoogleDriveStorage::GoogleDriveStorage(Common::String code, Networking::ErrorCallback cb) {
 	getAccessToken(code, cb);
@@ -63,6 +63,7 @@ bool GoogleDriveStorage::canReuseRefreshToken() { return true; }
 void GoogleDriveStorage::saveConfig(Common::String keyPrefix) {
 	ConfMan.set(keyPrefix + "access_token", _token, ConfMan.kCloudDomain);
 	ConfMan.set(keyPrefix + "refresh_token", _refreshToken, ConfMan.kCloudDomain);
+	saveIsEnabledFlag(keyPrefix);
 }
 
 Common::String GoogleDriveStorage::name() const {
@@ -228,12 +229,13 @@ GoogleDriveStorage *GoogleDriveStorage::loadFromConfig(Common::String keyPrefix)
 
 	Common::String accessToken = ConfMan.get(keyPrefix + "access_token", ConfMan.kCloudDomain);
 	Common::String refreshToken = ConfMan.get(keyPrefix + "refresh_token", ConfMan.kCloudDomain);
-	return new GoogleDriveStorage(accessToken, refreshToken);
+	return new GoogleDriveStorage(accessToken, refreshToken, loadIsEnabledFlag(keyPrefix));
 }
 
 void GoogleDriveStorage::removeFromConfig(Common::String keyPrefix) {
 	ConfMan.removeKey(keyPrefix + "access_token", ConfMan.kCloudDomain);
 	ConfMan.removeKey(keyPrefix + "refresh_token", ConfMan.kCloudDomain);
+	removeIsEnabledFlag(keyPrefix);
 }
 
 Common::String GoogleDriveStorage::getRootDirectoryId() {
diff --git a/backends/cloud/googledrive/googledrivestorage.h b/backends/cloud/googledrive/googledrivestorage.h
index db47e7cd3c..792c30a99f 100644
--- a/backends/cloud/googledrive/googledrivestorage.h
+++ b/backends/cloud/googledrive/googledrivestorage.h
@@ -31,7 +31,7 @@ namespace GoogleDrive {
 
 class GoogleDriveStorage: public Id::IdStorage {
 	/** This private constructor is called from loadFromConfig(). */
-	GoogleDriveStorage(Common::String token, Common::String refreshToken);
+	GoogleDriveStorage(Common::String token, Common::String refreshToken, bool enabled);
 
 	/** Constructs StorageInfo based on JSON response from cloud. */
 	void infoInnerCallback(StorageInfoCallback outerCallback, Networking::JsonResponse json);
diff --git a/backends/cloud/id/idstorage.cpp b/backends/cloud/id/idstorage.cpp
index dd8805ea9b..78c3facc2c 100644
--- a/backends/cloud/id/idstorage.cpp
+++ b/backends/cloud/id/idstorage.cpp
@@ -35,8 +35,8 @@ namespace Id {
 
 IdStorage::IdStorage() {}
 
-IdStorage::IdStorage(Common::String token, Common::String refreshToken):
-	BaseStorage(token, refreshToken) {}
+IdStorage::IdStorage(Common::String token, Common::String refreshToken, bool enabled):
+	BaseStorage(token, refreshToken, enabled) {}
 
 IdStorage::~IdStorage() {}
 
diff --git a/backends/cloud/id/idstorage.h b/backends/cloud/id/idstorage.h
index 35a320284e..26d2618508 100644
--- a/backends/cloud/id/idstorage.h
+++ b/backends/cloud/id/idstorage.h
@@ -53,7 +53,7 @@ protected:
 
 public:
 	IdStorage();
-	IdStorage(Common::String token, Common::String refreshToken);
+	IdStorage(Common::String token, Common::String refreshToken, bool enabled);
 	virtual ~IdStorage();
 
 	/** Public Cloud API comes down there. */
diff --git a/backends/cloud/onedrive/onedrivestorage.cpp b/backends/cloud/onedrive/onedrivestorage.cpp
index 6d05d84c39..e7ac5b70f5 100644
--- a/backends/cloud/onedrive/onedrivestorage.cpp
+++ b/backends/cloud/onedrive/onedrivestorage.cpp
@@ -42,8 +42,8 @@ namespace OneDrive {
 #define ONEDRIVE_API_SPECIAL_APPROOT_ID "https://graph.microsoft.com/v1.0/drive/special/approot:/"
 #define ONEDRIVE_API_SPECIAL_APPROOT "https://graph.microsoft.com/v1.0/drive/special/approot"
 
-OneDriveStorage::OneDriveStorage(Common::String token, Common::String refreshToken):
-	BaseStorage(token, refreshToken) {}
+OneDriveStorage::OneDriveStorage(Common::String token, Common::String refreshToken, bool enabled):
+	BaseStorage(token, refreshToken, enabled) {}
 
 OneDriveStorage::OneDriveStorage(Common::String code, Networking::ErrorCallback cb) {
 	getAccessToken(code, cb);
@@ -62,6 +62,7 @@ bool OneDriveStorage::canReuseRefreshToken() { return false; }
 void OneDriveStorage::saveConfig(Common::String keyPrefix) {
 	ConfMan.set(keyPrefix + "access_token", _token, ConfMan.kCloudDomain);
 	ConfMan.set(keyPrefix + "refresh_token", _refreshToken, ConfMan.kCloudDomain);
+	saveIsEnabledFlag(keyPrefix);
 }
 
 Common::String OneDriveStorage::name() const {
@@ -206,12 +207,13 @@ OneDriveStorage *OneDriveStorage::loadFromConfig(Common::String keyPrefix) {
 
 	Common::String accessToken = ConfMan.get(keyPrefix + "access_token", ConfMan.kCloudDomain);
 	Common::String refreshToken = ConfMan.get(keyPrefix + "refresh_token", ConfMan.kCloudDomain);
-	return new OneDriveStorage(accessToken, refreshToken);
+	return new OneDriveStorage(accessToken, refreshToken, loadIsEnabledFlag(keyPrefix));
 }
 
 void OneDriveStorage::removeFromConfig(Common::String keyPrefix) {
 	ConfMan.removeKey(keyPrefix + "access_token", ConfMan.kCloudDomain);
 	ConfMan.removeKey(keyPrefix + "refresh_token", ConfMan.kCloudDomain);
+	removeIsEnabledFlag(keyPrefix);
 }
 
 } // End of namespace OneDrive
diff --git a/backends/cloud/onedrive/onedrivestorage.h b/backends/cloud/onedrive/onedrivestorage.h
index cc46772282..edf6a5f53f 100644
--- a/backends/cloud/onedrive/onedrivestorage.h
+++ b/backends/cloud/onedrive/onedrivestorage.h
@@ -31,7 +31,7 @@ namespace OneDrive {
 
 class OneDriveStorage: public Cloud::BaseStorage {
 	/** This private constructor is called from loadFromConfig(). */
-	OneDriveStorage(Common::String token, Common::String refreshToken);
+	OneDriveStorage(Common::String token, Common::String refreshToken, bool enabled);
 
 	/** Constructs StorageInfo based on JSON response from cloud. */
 	void infoInnerCallback(StorageInfoCallback outerCallback, Networking::JsonResponse json);
diff --git a/backends/cloud/storage.cpp b/backends/cloud/storage.cpp
index 3a9ae53a43..ed7f8f0ae7 100644
--- a/backends/cloud/storage.cpp
+++ b/backends/cloud/storage.cpp
@@ -34,10 +34,18 @@ namespace Cloud {
 
 Storage::Storage():
 	_runningRequestsCount(0), _savesSyncRequest(nullptr), _syncRestartRequestsed(false),
-	_downloadFolderRequest(nullptr) {}
+	_downloadFolderRequest(nullptr), _isEnabled(false) {}
 
 Storage::~Storage() {}
 
+bool Storage::isEnabled() const {
+	return _isEnabled;
+}
+
+void Storage::enable() {
+	_isEnabled = true;
+}
+
 Networking::ErrorCallback Storage::getErrorPrintingCallback() {
 	return new Common::Callback<Storage, Networking::ErrorResponse>(this, &Storage::printErrorResponse);
 }
@@ -121,6 +129,12 @@ Networking::Request *Storage::downloadById(Common::String remoteId, Common::Stri
 }
 
 Networking::Request *Storage::downloadFolder(Common::String remotePath, Common::String localPath, FileArrayCallback callback, Networking::ErrorCallback errorCallback, bool recursive) {
+	if (!_isEnabled) {
+		warning("Storage::downloadFolder: cannot be run while Storage is disabled");
+		if (errorCallback)
+			(*errorCallback)(Networking::ErrorResponse(nullptr, false, true, "Storage is disabled.", -1));
+		return nullptr;
+	}
 	if (!errorCallback)
 		errorCallback = getErrorPrintingCallback();
 	return addRequest(new FolderDownloadRequest(this, callback, errorCallback, remotePath, localPath, recursive));
@@ -128,6 +142,13 @@ Networking::Request *Storage::downloadFolder(Common::String remotePath, Common::
 
 SavesSyncRequest *Storage::syncSaves(BoolCallback callback, Networking::ErrorCallback errorCallback) {
 	_runningRequestsMutex.lock();
+	if (!_isEnabled) {
+		warning("Storage::syncSaves: cannot be run while Storage is disabled");
+		if (errorCallback)
+			(*errorCallback)(Networking::ErrorResponse(nullptr, false, true, "Storage is disabled.", -1));
+		_runningRequestsMutex.unlock();
+		return nullptr;
+	}
 	if (_savesSyncRequest) {
 		warning("Storage::syncSaves: there is a sync in progress already");
 		_syncRestartRequestsed = true;
diff --git a/backends/cloud/storage.h b/backends/cloud/storage.h
index e914834dae..aa6455b841 100644
--- a/backends/cloud/storage.h
+++ b/backends/cloud/storage.h
@@ -70,6 +70,9 @@ protected:
 	/** FolderDownloadRequest-related */
 	FolderDownloadRequest *_downloadFolderRequest;
 
+	/** Whether user manually enabled the Storage. */
+	bool _isEnabled;
+
 	/** Returns default error callback (printErrorResponse). */
 	virtual Networking::ErrorCallback getErrorPrintingCallback();
 
@@ -116,6 +119,16 @@ public:
 	virtual Common::String name() const = 0;
 
 	/**
+	 * Return whether Storage has been manually enabled by user.
+	 */
+	bool isEnabled() const;
+
+	/**
+	 * Set _isEnabled to true.
+	 */
+	void enable();
+
+	/**
 	 * Public Cloud API comes down there.
 	 *
 	 * All Cloud API methods return Networking::Request *, which