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/*
 * Copyright (C) 2019 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef ANDROID_APEXD_APEXD_SESSION_H_
#define ANDROID_APEXD_APEXD_SESSION_H_

#include "apex_constants.h"
#include "status_or.h"

#include "session_state.pb.h"

#include <optional>

namespace android {
namespace apex {

static const std::string kApexSessionsDir =
    std::string(kApexDataDir) + "/sessions";

class ApexSession {
 public:
  static StatusOr<ApexSession> CreateSession(int session_id);
  static StatusOr<ApexSession> GetSession(int session_id);
  static std::vector<ApexSession> GetSessions();
  static std::vector<ApexSession> GetSessionsInState(
      ::apex::proto::SessionState::State state);
  static StatusOr<std::optional<ApexSession>> GetActiveSession();
  ApexSession() = delete;

  const google::protobuf::RepeatedField<int> GetChildSessionIds() const;
  ::apex::proto::SessionState::State GetState() const;
  int GetId() const;
  bool IsFinalized() const;

  void SetChildSessionIds(const std::vector<int>& child_session_ids);
  Status UpdateStateAndCommit(const ::apex::proto::SessionState::State& state);

  Status DeleteSession() const;

 private:
  ApexSession(const ::apex::proto::SessionState& state);
  ::apex::proto::SessionState state_;

  static StatusOr<ApexSession> GetSessionFromFile(const std::string& path);
};

std::ostream& operator<<(std::ostream& out, const ApexSession& session);

}  // namespace apex
}  // namespace android

#endif  // ANDROID_APEXD_APEXD_SESSION_H