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// Copyright 2018 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 OSP_IMPL_SERVICE_PUBLISHER_IMPL_H_
#define OSP_IMPL_SERVICE_PUBLISHER_IMPL_H_
#include <memory>
#include "osp/impl/with_destruction_callback.h"
#include "osp/public/service_publisher.h"
#include "platform/base/macros.h"
namespace openscreen {
namespace osp {
class ServicePublisherImpl final : public ServicePublisher,
public WithDestructionCallback {
public:
class Delegate {
public:
Delegate();
virtual ~Delegate();
void SetPublisherImpl(ServicePublisherImpl* publisher);
virtual void StartPublisher(const ServicePublisher::Config& config) = 0;
virtual void StartAndSuspendPublisher(
const ServicePublisher::Config& config) = 0;
virtual void StopPublisher() = 0;
virtual void SuspendPublisher() = 0;
virtual void ResumePublisher(const ServicePublisher::Config& config) = 0;
protected:
void SetState(State state) { publisher_->SetState(state); }
ServicePublisherImpl* publisher_ = nullptr;
};
// |observer| is optional. If it is provided, it will receive appropriate
// notifications about this ServicePublisher. |delegate| is required and
// is used to implement state transitions.
ServicePublisherImpl(Observer* observer, std::unique_ptr<Delegate> delegate);
~ServicePublisherImpl() override;
// ServicePublisher overrides.
bool Start() override;
bool StartAndSuspend() override;
bool Stop() override;
bool Suspend() override;
bool Resume() override;
private:
// Called by |delegate_| to transition the state machine (except kStarting and
// kStopping which are done automatically).
void SetState(State state);
// Notifies |observer_| if the transition to |state_| is one that is watched
// by the observer interface.
void MaybeNotifyObserver();
std::unique_ptr<Delegate> delegate_;
OSP_DISALLOW_COPY_AND_ASSIGN(ServicePublisherImpl);
};
} // namespace osp
} // namespace openscreen
#endif // OSP_IMPL_SERVICE_PUBLISHER_IMPL_H_
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