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// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef EXTENSIONS_BROWSER_EVENTS_LAZY_EVENT_DISPATCH_UTIL_H_
#define EXTENSIONS_BROWSER_EVENTS_LAZY_EVENT_DISPATCH_UTIL_H_
#include "base/memory/raw_ptr.h"
#include "base/observer_list.h"
#include "base/scoped_observation.h"
#include "extensions/browser/extension_registry.h"
#include "extensions/browser/extension_registry_observer.h"
#include "extensions/browser/uninstall_reason.h"
namespace base {
class Version;
}
namespace extensions {
// Utility class to observe extension installation and loading related events
// from lazy contexts.
//
// This class observes ExtensionRegistry and uses ExtensionPrefs to detect
// whether an extension is loaded after (first time) installation or after an
// update.
class LazyEventDispatchUtil : public ExtensionRegistryObserver {
public:
// Helps observer with events for lazy event dispatching.
class Observer {
public:
// Called when an extension is loaded after installation, for one of the
// following scenarios:
// 1. New extension is installed.
// 2. An extension is updated and loaded.
// 3. An extension is enabled after it was disabled during an update.
virtual void OnExtensionInstalledAndLoaded(
content::BrowserContext* browser_context,
const Extension* extension,
const base::Version& old_version) {}
};
explicit LazyEventDispatchUtil(content::BrowserContext* browser_context);
LazyEventDispatchUtil(const LazyEventDispatchUtil&) = delete;
LazyEventDispatchUtil& operator=(const LazyEventDispatchUtil&) = delete;
~LazyEventDispatchUtil() override;
void AddObserver(Observer* observer);
void RemoveObserver(Observer* observer);
// ExtensionRegistryObserver:
void OnExtensionLoaded(content::BrowserContext* browser_context,
const Extension* extension) override;
void OnExtensionWillBeInstalled(content::BrowserContext* browser_context,
const Extension* extension,
bool is_update,
const std::string& old_name) override;
void OnExtensionUninstalled(content::BrowserContext* browser_context,
const Extension* extension,
UninstallReason reason) override;
private:
bool ReadPendingOnInstallInfoFromPref(const ExtensionId& extension_id,
base::Version* previous_version);
void RemovePendingOnInstallInfoFromPref(const ExtensionId& extension_id);
void StorePendingOnInstallInfoToPref(const Extension* extension);
raw_ptr<content::BrowserContext> browser_context_;
base::ObserverList<Observer>::Unchecked observers_;
base::ScopedObservation<ExtensionRegistry, ExtensionRegistryObserver>
extension_registry_observation_{this};
};
} // namespace extensions
#endif // EXTENSIONS_BROWSER_EVENTS_LAZY_EVENT_DISPATCH_UTIL_H_
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