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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_H_
#define CHROME_BROWSER_UPGRADE_DETECTOR_H_
#pragma once
#include "base/timer.h"
#include "ui/gfx/image/image.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:
// The Homeland Security Upgrade Advisory System.
enum UpgradeNotificationAnnoyanceLevel {
UPGRADE_ANNOYANCE_NONE = 0, // What? Me worry?
UPGRADE_ANNOYANCE_LOW, // Green.
UPGRADE_ANNOYANCE_ELEVATED, // Yellow.
UPGRADE_ANNOYANCE_HIGH, // Red.
UPGRADE_ANNOYANCE_SEVERE, // Orange.
};
// The two types of icons we know about.
enum UpgradeNotificationIconType {
UPGRADE_ICON_TYPE_BADGE = 0, // For overlay badging of the wrench menu.
UPGRADE_ICON_TYPE_MENU_ICON, // For showing in the wrench menu.
};
// Returns the singleton implementation instance.
static UpgradeDetector* GetInstance();
virtual ~UpgradeDetector();
static void RegisterPrefs(PrefService* prefs);
bool notify_upgrade() { return notify_upgrade_; }
// Retrieves the right icon ID based on the degree of severity (see
// UpgradeNotificationAnnoyanceLevel, each level has an an accompanying icon
// to go with it). |type| determines which class of icons the caller wants,
// either an icon appropriate for badging the wrench menu or one to display
// within the wrench menu.
int GetIconResourceID(UpgradeNotificationIconType type);
protected:
UpgradeDetector();
// Sends out UPGRADE_DETECTED notification and record upgrade_detected_time_.
void NotifyUpgradeDetected();
// Sends out UPGRADE_RECOMMENDED notification and set notify_upgrade_.
void NotifyUpgradeRecommended();
// Accessors.
const base::Time& upgrade_detected_time() const {
return upgrade_detected_time_;
}
void set_upgrade_notification_stage(UpgradeNotificationAnnoyanceLevel stage) {
upgrade_notification_stage_ = stage;
}
private:
// When the upgrade was detected.
base::Time upgrade_detected_time_;
// The stage at which the annoyance level for upgrade notifications is at.
UpgradeNotificationAnnoyanceLevel upgrade_notification_stage_;
// 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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