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// Copyright (c) 2011 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_DEVICE_SETTINGS_PROVIDER_H_
#define CHROME_BROWSER_CHROMEOS_DEVICE_SETTINGS_PROVIDER_H_
#pragma once
#include <string>
#include <vector>
#include "base/basictypes.h"
#include "base/callback.h"
#include "base/hash_tables.h"
#include "chrome/browser/chromeos/cros_settings_provider.h"
#include "chrome/browser/chromeos/login/signed_settings_helper.h"
#include "chrome/browser/chromeos/signed_settings_migration_helper.h"
#include "chrome/browser/policy/proto/device_management_backend.pb.h"
#include "content/public/browser/notification_registrar.h"
namespace em = enterprise_management;
class PrefService;
namespace base {
class ListValue;
}
namespace chromeos {
class OwnershipService;
// CrosSettingsProvider implementation that works with SignedSettings.
class DeviceSettingsProvider : public CrosSettingsProvider,
public content::NotificationObserver {
public:
DeviceSettingsProvider();
virtual ~DeviceSettingsProvider();
// CrosSettingsProvider implementation.
virtual const base::Value* Get(const std::string& path) const OVERRIDE;
virtual bool GetTrusted(const std::string& path,
const base::Closure& callback) OVERRIDE;
virtual bool HandlesSetting(const std::string& path) const OVERRIDE;
virtual void Reload() OVERRIDE;
private:
// CrosSettingsProvider implementation:
virtual void DoSet(const std::string& path,
const base::Value& value) OVERRIDE;
// content::NotificationObserver implementation:
virtual void Observe(int type,
const content::NotificationSource& source,
const content::NotificationDetails& details) OVERRIDE;
const em::PolicyData policy() const;
// Populates in-memory cache from the local_state cache that is used to store
// signed settings before the device is owned and to speed up policy
// availability before the policy blob is fetched on boot.
void RetrieveCachedData();
// Stores a value in the signed settings. If the device is not owned yet the
// data ends up only in the local_state cache and is serialized once ownership
// is acquired.
void SetInPolicy(const std::string& prop, const base::Value& value);
// Finalizes stores to the policy file if the cache is dirty.
void FinishSetInPolicy(const std::string& prop,
const base::Value* value,
SignedSettings::ReturnCode code,
const em::PolicyFetchResponse& policy);
// Parses the policy cache and fills the cache of base::Value objects.
void UpdateValuesCache();
// Applies the metrics policy and if not set migrates the legacy file.
void ApplyMetricsSetting(bool use_file, bool new_value) const;
// Applies the data roaming policy.
void ApplyRoamingSetting(bool new_value) const;
// Applies any changes of the policies that are not handled by the respective
// subsystms.
void ApplySideEffects() const;
// Called right before boolean property is changed.
void OnBooleanPropertyChange(const std::string& path, bool new_value);
// Checks if the current cache value can be trusted for being representative
// for the disk cache.
bool RequestTrustedEntity();
// Called right after signed value was checked.
void OnPropertyRetrieve(const std::string& path,
const base::Value* value,
bool use_default_value);
// Callback of StorePolicyOp for ordinary policy stores.
void OnStorePolicyCompleted(SignedSettings::ReturnCode code);
// Callback of RetrievePolicyOp for ordinary policy [re]loads.
void OnRetrievePolicyCompleted(SignedSettings::ReturnCode code,
const em::PolicyFetchResponse& policy);
// Pending callbacks that need to be invoked after settings verification.
std::vector<base::Closure> callbacks_;
OwnershipService::Status ownership_status_;
mutable scoped_ptr<SignedSettingsMigrationHelper> migration_helper_;
content::NotificationRegistrar registrar_;
// In order to guard against occasional failure to fetch a property
// we allow for some number of retries.
int retries_left_;
em::PolicyData policy_;
bool trusted_;
PrefValueMap values_cache_;
friend class SignedSettingsHelper;
DISALLOW_COPY_AND_ASSIGN(DeviceSettingsProvider);
};
} // namespace chromeos
#endif // CHROME_BROWSER_CHROMEOS_DEVICE_SETTINGS_PROVIDER_H_
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