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// Copyright (c) 2010 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_UPGRADE_DETECTOR_H_
#define CHROME_BROWSER_UPGRADE_DETECTOR_H_
#include "base/singleton.h"
#include "base/timer.h"
class PrefService;
///////////////////////////////////////////////////////////////////////////////
// UpgradeDetector
//
// This class is a singleton class that monitors when an upgrade happens in the
// background. We basically ask Omaha what it thinks the latest version is and
// if our version is lower we send out a notification upon:
// a) Detecting an upgrade and...
// b) When we think the user should be notified about the upgrade.
// The latter happens much later, since we don't want to be too annoying.
//
class UpgradeDetector {
public:
~UpgradeDetector();
static void RegisterPrefs(PrefService* prefs);
bool notify_upgrade() { return notify_upgrade_; }
private:
UpgradeDetector();
friend struct DefaultSingletonTraits<UpgradeDetector>;
// Launches a task on the file thread to check if we have the latest version.
void CheckForUpgrade();
// Sends out a notification and starts a one shot timer to wait until
// notifying the user.
void UpgradeDetected();
// The function that sends out a notification (after a certain time has
// elapsed) that lets the rest of the UI know we should start notifying the
// user that a new version is available.
void NotifyOnUpgrade();
// We periodically check to see if Chrome has been upgraded.
base::RepeatingTimer<UpgradeDetector> detect_upgrade_timer_;
// After we detect an upgrade we wait a set time before notifying the user.
base::OneShotTimer<UpgradeDetector> upgrade_notification_timer_;
// We use this factory to create callback tasks for UpgradeDetected. We pass
// the task to the actual upgrade detection code, which is in
// DetectUpgradeTask.
ScopedRunnableMethodFactory<UpgradeDetector> method_factory_;
// Whether we have waited long enough after detecting an upgrade (to see
// is we should start nagging about upgrading).
bool notify_upgrade_;
DISALLOW_COPY_AND_ASSIGN(UpgradeDetector);
};
#endif // CHROME_BROWSER_UPGRADE_DETECTOR_H_
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