xref: /system/update_engine/client_library/include/update_engine/client.h

//
// Copyright (C) 2015 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 UPDATE_ENGINE_CLIENT_LIBRARY_INCLUDE_UPDATE_ENGINE_CLIENT_H_
#define UPDATE_ENGINE_CLIENT_LIBRARY_INCLUDE_UPDATE_ENGINE_CLIENT_H_

#include <cstdint>
#include <memory>
#include <string>

#include "update_engine/update_status.h"

namespace update_engine {

class UpdateEngineClient {
 public:
  static std::unique_ptr<UpdateEngineClient> CreateInstance();

  virtual ~UpdateEngineClient() = default;

  // Force the update_engine to attempt an update.
  // |app_version|
  //     Attempt to update to this version.  An empty string indicates that
  //     update engine should pick the most recent image on the current channel.
  // |omaha_url|
  //     Force update_engine to look for updates from the given server.  Passing
  //     empty indicates update_engine should get this parameter from its
  //     config.  Note that update_engine will ignore this parameter in
  //     production mode to avoid pulling untrusted updates.
  // |at_user_request|
  //     This update was directly requested by the user.
  virtual bool AttemptUpdate(const std::string& app_version,
                             const std::string& omaha_url,
                             bool at_user_request) = 0;

  // Returns the current status of the Update Engine.
  //
  // |out_last_checked_time|
  //     the last time the update engine checked for an update in seconds since
  //     the epoc.
  // |out_progress|
  //     when downloading an update, this is calculated as
  //     (number of bytes received) / (total bytes).
  // |out_update_status|
  //     See update_status.h.
  // |out_new_version|
  //     string version of the new system image.
  // |out_new_size|
  //     number of bytes in the new system image.
  virtual bool GetStatus(int64_t* out_last_checked_time,
                         double* out_progress,
                         UpdateStatus* out_update_status,
                         std::string* out_new_version,
                         int64_t* out_new_size) = 0;

  // Changes the current channel of the device to the target channel.
  virtual bool SetTargetChannel(const std::string& target_channel) = 0;

  // Get the channel the device will switch to on reboot.
  virtual bool GetTargetChannel(std::string* out_channel) = 0;

  // Get the channel the device is currently on.
  virtual bool GetChannel(std::string* out_channel) = 0;

 protected:
  // Use CreateInstance().
  UpdateEngineClient() = default;

 private:
  UpdateEngineClient(const UpdateEngineClient&) = delete;
  void operator=(const UpdateEngineClient&) = delete;
};  // class UpdateEngineClient

}  // namespace update_engine

#endif  // UPDATE_ENGINE_CLIENT_LIBRARY_INCLUDE_UPDATE_ENGINE_CLIENT_H_