4 files changed, 189 insertions, 0 deletions
diff --git a/backends/module.mk b/backends/module.mk
index 7574db4009..4c1ca42f06 100644
--- a/backends/module.mk
+++ b/backends/module.mk
@@ -119,6 +119,7 @@ MODULE_OBJS += \
 	midi/windows.o \
 	plugins/win32/win32-provider.o \
 	saves/windows/windows-saves.o \
+	updates/win32/win32-updates.o \
 	taskbar/win32/win32-taskbar.o
 endif
 
diff --git a/backends/platform/sdl/win32/win32.cpp b/backends/platform/sdl/win32/win32.cpp
index fbab7eb782..fcc0849624 100644
--- a/backends/platform/sdl/win32/win32.cpp
+++ b/backends/platform/sdl/win32/win32.cpp
@@ -41,6 +41,7 @@
 #include "backends/saves/windows/windows-saves.h"
 #include "backends/fs/windows/windows-fs-factory.h"
 #include "backends/taskbar/win32/win32-taskbar.h"
+#include "backends/updates/win32/win32-updates.h"
 
 #include "common/memstream.h"
 
@@ -82,6 +83,11 @@ void OSystem_Win32::initBackend() {
 	if (_savefileManager == 0)
 		_savefileManager = new WindowsSaveFileManager();
 
+#if defined(USE_SPARKLE)
+	// Initialize updates manager
+	_updateManager = new Win32UpdateManager();
+#endif
+
 	// Invoke parent implementation of this method
 	OSystem_SDL::initBackend();
 }
diff --git a/backends/updates/win32/win32-updates.cpp b/backends/updates/win32/win32-updates.cpp
new file mode 100644
index 0000000000..4a1200b68b
--- /dev/null
+++ b/backends/updates/win32/win32-updates.cpp
@@ -0,0 +1,132 @@
+/* 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.
+ *
+ */
+
+// Disable symbol overrides so that we can use system headers.
+#define FORBIDDEN_SYMBOL_ALLOW_ALL
+
+#include "common/system.h"
+#include "backends/updates/win32/win32-updates.h"
+
+#ifdef USE_SPARKLE
+#include "common/translation.h"
+#include "common/config-manager.h"
+
+#include <time.h>
+#include <winsparkle.h>
+
+/**
+ * Sparkle is a software update framework for Mac OS X which uses appcasts for
+ * release information. Appcasts are RSS-like XML feeds which contain information
+ * about the most current version at the time. If a new version is available, the
+ * user is presented the release-notes/changes/fixes and is asked if he wants to
+ * update, and if yes the Sparkle framework downloads a signed update package
+ * from the server and automatically installs and restarts the software.
+ * More detailed information is available at the following address:
+ * http://sparkle.andymatuschak.org/
+ *
+ * WinSparkle is a heavily (to the point of being its almost-port) inspired by the
+ * Sparkle framework originally by Andy Matuschak that became the de facto standard
+ * for software updates on OS X.
+ * More detailed information is available at the following address:
+ * https://winsparkle.org/
+ *
+ */
+Win32UpdateManager::Win32UpdateManager() {
+	const char *appcastUrl = "https://www.scummvm.org/appcasts/macosx/release.xml";
+
+	win_sparkle_set_appcast_url(appcastUrl);
+    win_sparkle_init();
+	
+	if (!ConfMan.hasKey("updates_check")
+			|| ConfMan.getInt("updates_check") == Common::UpdateManager::kUpdateIntervalNotSupported) {
+		setAutomaticallyChecksForUpdates(kUpdateStateDisabled);
+	} else {
+		setAutomaticallyChecksForUpdates(kUpdateStateEnabled);
+		setUpdateCheckInterval(normalizeInterval(ConfMan.getInt("updates_check")));
+	}
+}
+
+Win32UpdateManager::~Win32UpdateManager() {
+	win_sparkle_cleanup();
+}
+
+void Win32UpdateManager::checkForUpdates() {
+	win_sparkle_check_update_with_ui();
+}
+
+void Win32UpdateManager::setAutomaticallyChecksForUpdates(UpdateManager::UpdateState state) {
+	if (state == kUpdateStateNotSupported)
+		return;
+
+	win_sparkle_set_automatic_check_for_updates(state == kUpdateStateEnabled ? 1 : 0);
+}
+
+Common::UpdateManager::UpdateState Win32UpdateManager::getAutomaticallyChecksForUpdates() {
+	if (win_sparkle_get_automatic_check_for_updates() == 1)
+		return kUpdateStateEnabled;
+	else
+		return kUpdateStateDisabled;
+}
+
+void Win32UpdateManager::setUpdateCheckInterval(int interval) {
+	if (interval == kUpdateIntervalNotSupported)
+		return;
+
+	interval = normalizeInterval(interval);
+
+	win_sparkle_set_update_check_interval(interval);
+}
+
+int Win32UpdateManager::getUpdateCheckInterval() {
+	// This is kind of a hack but necessary, as the value stored by Sparkle
+	// might have been changed outside of ScummVM (in which case we return the
+	// default interval of one day)
+
+	int updateInterval = win_sparkle_get_update_check_interval();
+	switch (updateInterval) {
+	case kUpdateIntervalOneDay:
+	case kUpdateIntervalOneWeek:
+	case kUpdateIntervalOneMonth:
+		return updateInterval;
+
+	default:
+		// Return the default value (one day)
+		return kUpdateIntervalOneDay;
+	}
+}
+
+bool Win32UpdateManager::getLastUpdateCheckTimeAndDate(TimeDate &t) {
+	time_t updateTime = win_sparkle_get_last_check_time();
+	tm *ut = localtime(&updateTime);
+	
+	t.tm_wday = ut->tm_wday;
+	t.tm_year = ut->tm_year;
+	t.tm_mon  = ut->tm_mon;
+	t.tm_mday = ut->tm_mday;
+	t.tm_hour = ut->tm_hour;
+	t.tm_min  = ut->tm_min;
+	t.tm_sec  = ut->tm_sec;
+
+	return true;
+}
+
+#endif
diff --git a/backends/updates/win32/win32-updates.h b/backends/updates/win32/win32-updates.h
new file mode 100644
index 0000000000..71ed9ef685
--- /dev/null
+++ b/backends/updates/win32/win32-updates.h
@@ -0,0 +1,50 @@
+/* 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_UPDATES_WIN32_H
+#define BACKENDS_UPDATES_WIN32_H
+
+#include "common/scummsys.h"
+
+#if defined(WIN32) && defined(USE_SPARKLE)
+
+#include "common/updates.h"
+
+class Win32UpdateManager : public Common::UpdateManager {
+public:
+	Win32UpdateManager();
+	virtual ~Win32UpdateManager();
+
+	virtual void checkForUpdates();
+
+	virtual void setAutomaticallyChecksForUpdates(UpdateState state);
+	virtual UpdateState getAutomaticallyChecksForUpdates();
+
+	virtual void setUpdateCheckInterval(int interval);
+	virtual int getUpdateCheckInterval();
+
+	virtual bool getLastUpdateCheckTimeAndDate(TimeDate &t);
+};
+
+#endif
+
+#endif // BACKENDS_UPDATES_WIN32_H