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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_POLICY_VALUE_PROVIDER_POLICY_VALUE_PROVIDER_H_
#define CHROME_BROWSER_POLICY_VALUE_PROVIDER_POLICY_VALUE_PROVIDER_H_
#include "base/observer_list.h"
#include "base/observer_list_types.h"
#include "base/values.h"
namespace policy {
// An interface for querying a policy provider about policy names and values and
// refreshing them.
class PolicyValueProvider {
public:
class Observer : public base::CheckedObserver {
public:
virtual void OnPolicyValueChanged() = 0;
};
PolicyValueProvider();
PolicyValueProvider(const PolicyValueProvider&) = delete;
PolicyValueProvider& operator=(const PolicyValueProvider&) = delete;
virtual ~PolicyValueProvider();
// Returns the dictionary containing policy values.
virtual base::Value::Dict GetValues() = 0;
// Returns the dictionary containing the policy names.
virtual base::Value::Dict GetNames() = 0;
// Refreshes the policy values and notifies the observers.
virtual void Refresh();
void AddObserver(Observer* observer);
void RemoveObserver(Observer* observer);
protected:
void NotifyValueChange();
private:
base::ObserverList<Observer> observers_;
};
} // namespace policy
#endif // CHROME_BROWSER_POLICY_VALUE_PROVIDER_POLICY_VALUE_PROVIDER_H_
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