Add unique but random UUID to server queries

With this we can easily eliminate duplicates from our user statistics. The
UUID is completely random and there is no way to link it back to a
specific user. By deleting the settings a user can force a new UUID.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

3 files changed, 22 insertions, 1 deletions

diff --git a/qt-ui/updatemanager.cpp b/qt-ui/updatemanager.cpp
index b920a8ebb..e972c4496 100644
--- a/qt-ui/updatemanager.cpp
+++ b/qt-ui/updatemanager.cpp
@@ -2,6 +2,7 @@
 #include "usersurvey.h"
 #include <QtNetwork>
 #include <QMessageBox>
+#include <QUuid>
 #include "subsurfacewebservices.h"
 #include "ssrf-version.h"
 #include "mainwindow.h"
@@ -47,7 +48,8 @@ void UpdateManager::checkForUpdates(bool automatic)
 #endif
 	isAutomaticCheck = automatic;
 	QString version = CANONICAL_VERSION_STRING;
-	QString url = QString("http://subsurface-divelog.org/updatecheck.html?os=%1&version=%2").arg(os, version);
+	QString uuidString = getUUID();
+	QString url = QString("http://subsurface-divelog.org/updatecheck.html?os=%1&version=%2&uuid=%3").arg(os, version, uuidString);
 	QNetworkRequest request;
 	request.setUrl(url);
 	request.setRawHeader("Accept", "text/xml");
@@ -56,6 +58,22 @@ void UpdateManager::checkForUpdates(bool automatic)
 	connect(SubsurfaceWebServices::manager()->get(request), SIGNAL(finished()), this, SLOT(requestReceived()), Qt::UniqueConnection);
 }
 
+QString UpdateManager::getUUID()
+{
+	QString uuidString;
+	QSettings settings;
+	settings.beginGroup("UpdateManager");
+	if (settings.contains("UUID")) {
+		uuidString = settings.value("UUID").toString();
+	} else {
+		QUuid uuid = QUuid::createUuid();
+		uuidString = uuid.toString();
+		settings.setValue("UUID", uuidString);
+	}
+	uuidString.replace("{", "").replace("}", "");
+	return uuidString;
+}
+
 void UpdateManager::requestReceived()
 {
 	bool haveNewVersion = false;
diff --git a/qt-ui/updatemanager.h b/qt-ui/updatemanager.h
index 4e95d740f..f91c82dc8 100644
--- a/qt-ui/updatemanager.h
+++ b/qt-ui/updatemanager.h
@@ -11,6 +11,7 @@ class UpdateManager : public QObject {
 public:
 	explicit UpdateManager(QObject *parent = 0);
 	void checkForUpdates(bool automatic = false);
+	static QString getUUID();
 
 public
 slots:
diff --git a/qt-ui/usersurvey.cpp b/qt-ui/usersurvey.cpp
index ed5d121e2..4061d46df 100644
--- a/qt-ui/usersurvey.cpp
+++ b/qt-ui/usersurvey.cpp
@@ -6,6 +6,7 @@
 #include "ui_usersurvey.h"
 #include "ssrf-version.h"
 #include "subsurfacewebservices.h"
+#include "updatemanager.h"
 
 #include "helpers.h"
 #include "subsurfacesysinfo.h"
@@ -30,6 +31,7 @@ UserSurvey::UserSurvey(QWidget *parent) : QDialog(parent),
 		os.append(QString("&osCpuArch=%1").arg(osArch));
 	}
 	os.append(QString("&uiLang=%1").arg(uiLanguage(NULL)));
+	os.append(QString("&uuid=%1").arg(UpdateManager::getUUID()));
 	ui->system->setPlainText(getVersion());
 }