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// Copyright 2013 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_CHROMEOS_EXTENSIONS_DEVICE_LOCAL_ACCOUNT_EXTERNAL_POLICY_LOADER_H_
#define CHROME_BROWSER_CHROMEOS_EXTENSIONS_DEVICE_LOCAL_ACCOUNT_EXTERNAL_POLICY_LOADER_H_
#include "base/basictypes.h"
#include "base/callback_forward.h"
#include "base/compiler_specific.h"
#include "base/files/file_path.h"
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "base/sequenced_task_runner.h"
#include "chrome/browser/chromeos/extensions/external_cache.h"
#include "chrome/browser/extensions/external_loader.h"
#include "components/policy/core/common/cloud/cloud_policy_store.h"
namespace chromeos {
// A specialization of the ExternalLoader that serves external extensions from
// the enterprise policy force-install list. This class is used for device-local
// accounts in place of the ExternalPolicyLoader. The difference is that while
// the ExternalPolicyLoader requires extensions to be downloaded on-the-fly,
// this class caches them, allowing for offline installation.
class DeviceLocalAccountExternalPolicyLoader
: public extensions::ExternalLoader,
public policy::CloudPolicyStore::Observer,
public ExternalCache::Delegate {
public:
// The list of force-installed extensions will be read from |store| and the
// extensions will be cached in the |cache_dir_|.
DeviceLocalAccountExternalPolicyLoader(policy::CloudPolicyStore* store,
const base::FilePath& cache_dir);
// While running, the cache requires exclusive write access to the
// |cache_dir_|.
bool IsCacheRunning() const;
// Start the cache. This method must only be invoked when there are no pending
// write operations to |cache_dir_| on any thread and none will be initiated
// while the cache is running.
void StartCache(
const scoped_refptr<base::SequencedTaskRunner>& cache_task_runner);
// Stop the cache. The |callback| will be invoked when the cache has shut down
// completely and write access to the |cache_dir_| is permitted again.
void StopCache(const base::Closure& callback);
// extensions::ExternalLoader:
virtual void StartLoading() override;
// policy::CloudPolicyStore::Observer:
virtual void OnStoreLoaded(policy::CloudPolicyStore* store) override;
virtual void OnStoreError(policy::CloudPolicyStore* store) override;
// ExternalCache::Delegate:
virtual void OnExtensionListsUpdated(
const base::DictionaryValue* prefs) override;
ExternalCache* GetExternalCacheForTesting();
private:
// If the cache was started, it must be stopped before |this| is destroyed.
virtual ~DeviceLocalAccountExternalPolicyLoader();
// Pass the current list of force-installed extensions from the |store_| to
// the |external_cache_|.
void UpdateExtensionListFromStore();
policy::CloudPolicyStore* store_;
const base::FilePath cache_dir_;
scoped_ptr<ExternalCache> external_cache_;
DISALLOW_COPY_AND_ASSIGN(DeviceLocalAccountExternalPolicyLoader);
};
} // namespace chromeos
#endif // CHROME_BROWSER_CHROMEOS_EXTENSIONS_DEVICE_LOCAL_ACCOUNT_EXTERNAL_POLICY_LOADER_H_
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