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// Copyright (c) 2012 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 COMPONENTS_POLICY_CORE_BROWSER_CONFIGURATION_POLICY_PREF_STORE_H_
#define COMPONENTS_POLICY_CORE_BROWSER_CONFIGURATION_POLICY_PREF_STORE_H_
#include <memory>
#include <string>
#include "base/macros.h"
#include "base/observer_list.h"
#include "base/values.h"
#include "components/policy/core/common/policy_map.h"
#include "components/policy/core/common/policy_service.h"
#include "components/policy/core/common/policy_types.h"
#include "components/policy/policy_export.h"
#include "components/prefs/pref_store.h"
class PrefValueMap;
namespace policy {
class ConfigurationPolicyHandlerList;
// An implementation of PrefStore that bridges policy settings as read from the
// PolicyService to preferences. Converts POLICY_DOMAIN_CHROME policies a given
// PolicyLevel to their corresponding preferences.
class POLICY_EXPORT ConfigurationPolicyPrefStore
: public PrefStore,
public PolicyService::Observer {
public:
// Does not take ownership of |service| nor |handler_list|, which must outlive
// the store. Only policies of the given |level| will be mapped.
ConfigurationPolicyPrefStore(
PolicyService* service,
const ConfigurationPolicyHandlerList* handler_list,
PolicyLevel level);
// PrefStore methods:
void AddObserver(PrefStore::Observer* observer) override;
void RemoveObserver(PrefStore::Observer* observer) override;
bool HasObservers() const override;
bool IsInitializationComplete() const override;
bool GetValue(const std::string& key,
const base::Value** result) const override;
std::unique_ptr<base::DictionaryValue> GetValues() const override;
// PolicyService::Observer methods:
void OnPolicyUpdated(const PolicyNamespace& ns,
const PolicyMap& previous,
const PolicyMap& current) override;
void OnPolicyServiceInitialized(PolicyDomain domain) override;
private:
~ConfigurationPolicyPrefStore() override;
// Refreshes policy information, rereading policy from the policy service and
// sending out change notifications as appropriate.
void Refresh();
// Returns a new PrefValueMap containing the preference values that correspond
// to the policies currently provided by the policy service.
PrefValueMap* CreatePreferencesFromPolicies();
// The PolicyService from which policy settings are read.
PolicyService* policy_service_;
// The policy handlers used to convert policies into their corresponding
// preferences.
const ConfigurationPolicyHandlerList* handler_list_;
// The policy level that this PrefStore uses.
PolicyLevel level_;
// Current policy preferences.
std::unique_ptr<PrefValueMap> prefs_;
base::ObserverList<PrefStore::Observer, true> observers_;
DISALLOW_COPY_AND_ASSIGN(ConfigurationPolicyPrefStore);
};
} // namespace policy
#endif // COMPONENTS_POLICY_CORE_BROWSER_CONFIGURATION_POLICY_PREF_STORE_H_