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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 CHROME_BROWSER_POLICY_MANAGED_MODE_POLICY_PROVIDER_H_
#define CHROME_BROWSER_POLICY_MANAGED_MODE_POLICY_PROVIDER_H_
#include "base/memory/ref_counted.h"
#include "base/prefs/pref_store.h"
#include "chrome/browser/policy/configuration_policy_provider.h"
class PersistentPrefStore;
class Profile;
namespace base {
class SequencedTaskRunner;
}
namespace policy {
// This class sets policies that are defined by a local user via "Managed Mode".
// It offers methods to set and read policies, and persists them on disk in
// JSON format.
class ManagedModePolicyProvider
: public ConfigurationPolicyProvider,
public PrefStore::Observer {
public:
// The dictionary key under which we store the policy dictionary. Public for
// testing.
static const char kPolicies[];
// Creates a new ManagedModePolicyProvider that caches its policies in a JSON
// file inside the profile folder. |sequenced_task_runner| ensures that all
// file I/O operations are executed in the order that does not collide
// with Profile's file operations. If |force_immediate_policy_load| is true,
// then the underlying policies are loaded immediately before this call
// returns, otherwise they will be loaded asynchronously in the background.
static scoped_ptr<ManagedModePolicyProvider> Create(
Profile* profile,
base::SequencedTaskRunner* sequenced_task_runner,
bool force_immediate_policy_load);
// Use this constructor to inject a different PrefStore (e.g. for testing).
explicit ManagedModePolicyProvider(PersistentPrefStore* store);
virtual ~ManagedModePolicyProvider();
// Sets the default policies for a managed user when no policies have ever
// been set. This method should be called before any of the policy
// getters/setters below.
void InitDefaults();
// Sets the default policies to |dict|.
void InitDefaultsForTesting(scoped_ptr<DictionaryValue> dict);
// Returns all policies defined by this class.
const base::DictionaryValue* GetPolicies() const;
// Returns the stored value for a policy with the given |key|, or NULL if no
// such policy is defined.
const base::Value* GetPolicy(const std::string& key) const;
// Convenience method that returns a copy of the stored dictionary to update
// and pass back to SetPolicy(). There is no locking, so in order to prevent
// multiple clients from overwriting each other's changes, the call to
// SetPolicy() should happen on the same iteration of the message loop as the
// call to this method.
scoped_ptr<base::DictionaryValue> GetPolicyDictionary(const std::string& key);
// Sets the policy with the given |key| to a copy of the given |value|.
// Note that policies are updated asynchronously, so the policy won't take
// effect immediately after this method.
void SetPolicy(const std::string& key, scoped_ptr<base::Value> value);
// ConfigurationPolicyProvider implementation:
virtual void Shutdown() OVERRIDE;
virtual void RefreshPolicies() OVERRIDE;
virtual bool IsInitializationComplete(PolicyDomain domain) const OVERRIDE;
// PrefStore::Observer implementation:
virtual void OnPrefValueChanged(const std::string& key) OVERRIDE;
virtual void OnInitializationCompleted(bool success) OVERRIDE;
private:
base::DictionaryValue* GetCachedPolicy() const;
void UpdatePolicyFromCache();
// Used for persisting policies. Unlike other PrefStores, this one is not
// hooked up to the PrefService.
scoped_refptr<PersistentPrefStore> store_;
};
} // namespace policy
#endif // CHROME_BROWSER_POLICY_MANAGED_MODE_POLICY_PROVIDER_H_
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