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// Copyright 2014 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_COPRESENCE_PUBLIC_COPRESENCE_STATE_H_
#define COMPONENTS_COPRESENCE_PUBLIC_COPRESENCE_STATE_H_
#include <map>
#include <string>
#include <vector>
namespace copresence {
class CopresenceObserver;
class Directive;
struct TransmittedToken;
struct ReceivedToken;
// This class tracks the state of the copresence component and can notify
// interested parties when it changes. This is useful for debugging purposes.
class CopresenceState {
public:
// Add a listener for future state changes. |observer| is owned by the caller,
// and must be valid until removed (or the CopresenceState is destroyed).
virtual void AddObserver(CopresenceObserver* observer) = 0;
// Remove a state change listener.
virtual void RemoveObserver(CopresenceObserver* observer) = 0;
// Accessor for the currently active directives.
virtual const std::vector<Directive>& active_directives() const = 0;
// Accessor for recently transmitted tokens.
virtual const std::map<std::string, TransmittedToken>&
transmitted_tokens() const = 0;
// Accessor for recently received tokens.
virtual const std::map<std::string, ReceivedToken>&
received_tokens() const = 0;
protected:
virtual ~CopresenceState() {}
};
} // namespace copresence
#endif // COMPONENTS_COPRESENCE_PUBLIC_COPRESENCE_STATE_H_
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