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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_UPDATER_EXTENSION_CACHE_IMPL_H_
#define CHROME_BROWSER_EXTENSIONS_UPDATER_EXTENSION_CACHE_IMPL_H_
#include <set>
#include <string>
#include <vector>
#include "base/callback_forward.h"
#include "base/files/file_path.h"
#include "base/memory/scoped_ptr.h"
#include "base/memory/weak_ptr.h"
#include "content/public/browser/notification_observer.h"
#include "content/public/browser/notification_registrar.h"
#include "extensions/browser/updater/extension_cache.h"
template <typename T> struct DefaultSingletonTraits;
namespace extensions {
class ExtensionCacheDelegate;
class LocalExtensionCache;
// Singleton call that caches extensions .crx files to share them between
// multiple users and profiles on the machine.
class ExtensionCacheImpl : public ExtensionCache,
public content::NotificationObserver {
public:
explicit ExtensionCacheImpl(scoped_ptr<ExtensionCacheDelegate> delegate);
~ExtensionCacheImpl() override;
// Implementation of ExtensionCache.
void Start(const base::Closure& callback) override;
void Shutdown(const base::Closure& callback) override;
void AllowCaching(const std::string& id) override;
bool GetExtension(const std::string& id,
const std::string& expected_hash,
base::FilePath* file_path,
std::string* version) override;
void PutExtension(const std::string& id,
const std::string& expected_hash,
const base::FilePath& file_path,
const std::string& version,
const PutExtensionCallback& callback) override;
// Implementation of content::NotificationObserver:
void Observe(int type,
const content::NotificationSource& source,
const content::NotificationDetails& details) override;
private:
// Callback that is called when local cache is ready.
void OnCacheInitialized();
// Check if this extension is allowed to be cached.
bool CachingAllowed(const std::string& id);
// Cache implementation that uses local cache dir.
scoped_ptr<LocalExtensionCache> cache_;
// Set of extensions that can be cached.
std::set<std::string> allowed_extensions_;
// List of callbacks that should be called when the cache is ready.
std::vector<base::Closure> init_callbacks_;
// Observes failures to install CRX files.
content::NotificationRegistrar notification_registrar_;
// Weak factory for callbacks.
base::WeakPtrFactory<ExtensionCacheImpl> weak_ptr_factory_;
DISALLOW_COPY_AND_ASSIGN(ExtensionCacheImpl);
};
} // namespace extensions
#endif // CHROME_BROWSER_EXTENSIONS_UPDATER_EXTENSION_CACHE_IMPL_H_
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