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// Copyright (c) 2011 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_IMPL_H_
#define CHROME_BROWSER_UPGRADE_DETECTOR_IMPL_H_
#include "base/memory/weak_ptr.h"
#include "base/timer/timer.h"
#include "base/version.h"
#include "chrome/browser/metrics/variations/variations_service.h"
#include "chrome/browser/upgrade_detector.h"
template <typename T> struct DefaultSingletonTraits;
class UpgradeDetectorImpl :
public UpgradeDetector,
public chrome_variations::VariationsService::Observer {
public:
virtual ~UpgradeDetectorImpl();
// Returns the currently installed Chrome version, which may be newer than the
// one currently running. Not supported on Android, iOS or ChromeOS. Must be
// run on a thread where I/O operations are allowed (e.g. FILE thread).
static base::Version GetCurrentlyInstalledVersion();
// Returns the singleton instance.
static UpgradeDetectorImpl* GetInstance();
protected:
UpgradeDetectorImpl();
// chrome_variations::VariationsService::Observer:
virtual void OnExperimentChangesDetected(Severity severity) OVERRIDE;
// Trigger an "on upgrade" notification based on the specified |time_passed|
// interval. Exposed as protected for testing.
void NotifyOnUpgradeWithTimePassed(base::TimeDelta time_passed);
private:
friend struct DefaultSingletonTraits<UpgradeDetectorImpl>;
// Start the timer that will call |CheckForUpgrade()|.
void StartTimerForUpgradeCheck();
// Launches a task on the file thread to check if we have the latest version.
void CheckForUpgrade();
// Starts the upgrade notification timer that will check periodically whether
// enough time has elapsed to update the severity (which maps to visual
// badging) of the notification.
void StartUpgradeNotificationTimer();
// Sends out a notification and starts a one shot timer to wait until
// notifying the user.
void UpgradeDetected(UpgradeAvailable upgrade_available);
// Returns true after calling UpgradeDetected if current install is outdated.
bool DetectOutdatedInstall();
// 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();
// Called on the FILE thread to detect an upgrade. Calls back UpgradeDetected
// on the UI thread if so. Although it looks weird, this needs to be a static
// method receiving a WeakPtr<> to this object so that we can interrupt
// the UpgradeDetected callback before it runs. Having this method non-static
// and using |this| directly wouldn't be thread safe. And keeping it as a
// non-class function would prevent it from calling UpgradeDetected.
static void DetectUpgradeTask(
base::WeakPtr<UpgradeDetectorImpl> upgrade_detector);
// We periodically check to see if Chrome has been upgraded.
base::RepeatingTimer<UpgradeDetectorImpl> detect_upgrade_timer_;
// After we detect an upgrade we start a recurring timer to see if enough time
// has passed and we should start notifying the user.
base::RepeatingTimer<UpgradeDetectorImpl> 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.
base::WeakPtrFactory<UpgradeDetectorImpl> weak_factory_;
// True if this build is a dev or canary channel build.
bool is_unstable_channel_;
// True if auto update is turned on.
bool is_auto_update_enabled_;
// When the upgrade was detected - either a software update or a variations
// update, whichever happened first.
base::Time upgrade_detected_time_;
// The date the binaries were built.
base::Time build_date_;
DISALLOW_COPY_AND_ASSIGN(UpgradeDetectorImpl);
};
#endif // CHROME_BROWSER_UPGRADE_DETECTOR_IMPL_H_
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