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// Copyright 2014 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_EXTENSIONS_EXTENSION_STORAGE_MONITOR_H_
#define CHROME_BROWSER_EXTENSIONS_EXTENSION_STORAGE_MONITOR_H_
#include <set>
#include "base/memory/ref_counted.h"
#include "base/memory/weak_ptr.h"
#include "components/keyed_service/core/keyed_service.h"
#include "content/public/browser/notification_observer.h"
#include "content/public/browser/notification_registrar.h"
#include "extensions/browser/extension_registry_observer.h"
namespace content {
class BrowserContext;
}
namespace gfx {
class Image;
}
namespace extensions {
class Extension;
class StorageEventObserver;
// ExtensionStorageMonitor monitors the storage usage of extensions and apps
// that are granted unlimited storage and displays notifications when high
// usage is detected.
class ExtensionStorageMonitor : public KeyedService,
public content::NotificationObserver,
public ExtensionRegistryObserver {
public:
static ExtensionStorageMonitor* Get(content::BrowserContext* context);
// Indices of buttons in the notification. Exposed for testing.
enum ButtonIndex {
BUTTON_DISABLE_NOTIFICATION = 0
};
explicit ExtensionStorageMonitor(content::BrowserContext* context);
virtual ~ExtensionStorageMonitor();
private:
// content::NotificationObserver overrides:
virtual void Observe(int type,
const content::NotificationSource& source,
const content::NotificationDetails& details) OVERRIDE;
// ExtensionRegistryObserver overrides:
virtual void OnExtensionLoaded(content::BrowserContext* browser_context,
const Extension* extension) OVERRIDE;
virtual void OnExtensionUnloaded(content::BrowserContext* browser_context,
const Extension* extension,
UnloadedExtensionInfo::Reason reason)
OVERRIDE;
std::string GetNotificationId(const std::string& extension_id);
void OnStorageThresholdExceeded(const std::string& extension_id,
int64 next_threshold,
int64 current_usage);
void OnImageLoaded(const std::string& extension_id,
int64 current_usage,
const gfx::Image& image);
void OnNotificationButtonClick(const std::string& extension_id,
int button_index);
void DisableStorageMonitoring(const std::string& extension_id);
void StartMonitoringStorage(const Extension* extension);
void StopMonitoringStorage(const std::string& extension_id);
void StopMonitoringAll();
void RemoveNotificationForExtension(const std::string& extension_id);
void RemoveAllNotifications();
// Initially, monitoring will only be applied to ephemeral apps. This flag
// is set by tests to enable for all extensions and apps.
bool enable_for_all_extensions_;
// A lower threshold is set by tests.
int64 initial_extension_threshold_;
int64 initial_ephemeral_threshold_;
int observer_rate_;
std::set<std::string> notified_extension_ids_;
content::BrowserContext* context_;
content::NotificationRegistrar registrar_;
scoped_refptr<StorageEventObserver> storage_observer_;
base::WeakPtrFactory<ExtensionStorageMonitor> weak_ptr_factory_;
friend class StorageEventObserver;
friend class ExtensionStorageMonitorTest;
DISALLOW_COPY_AND_ASSIGN(ExtensionStorageMonitor);
};
} // namespace extensions
#endif // CHROME_BROWSER_EXTENSIONS_EXTENSION_STORAGE_MONITOR_H_
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