// 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 ASH_ASSISTANT_ASSISTANT_CONTROLLER_OBSERVER_H_
#define ASH_ASSISTANT_ASSISTANT_CONTROLLER_OBSERVER_H_

#include <map>
#include <string>

#include "base/macros.h"
#include "base/observer_list_types.h"

class GURL;

namespace ash {

namespace assistant {
namespace util {
enum class DeepLinkType;
}  // namespace util
}  // namespace assistant

// A checked observer which receives notification of changes to the
// AssistantController.
class AssistantControllerObserver : public base::CheckedObserver {
 public:
  // Invoked when the AssistantController has been fully constructed.
  virtual void OnAssistantControllerConstructed() {}

  // Invoked when the AssistantController is starting to be destroyed.
  virtual void OnAssistantControllerDestroying() {}

  // Invoked when Assistant has received a deep link of the specified |type|
  // with the given |params|.
  virtual void OnDeepLinkReceived(
      assistant::util::DeepLinkType type,
      const std::map<std::string, std::string>& params) {}

  // Invoked when the specified |url| is opened by Assistant in a new tab. If
  // |from_server| is true, this event was triggered by a server response.
  virtual void OnUrlOpened(const GURL& url, bool from_server) {}

 protected:
  AssistantControllerObserver() = default;
  ~AssistantControllerObserver() override = default;

  DISALLOW_COPY_AND_ASSIGN(AssistantControllerObserver);
};

}  // namespace ash

#endif  // ASH_ASSISTANT_ASSISTANT_CONTROLLER_OBSERVER_H_