public/lib/device_settings/fidl/device_settings.fidl

// Copyright 2017 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

module device_settings;

enum Status {
  OK,
  ERR_NOT_SET,
  ERR_INVALID_SETTING,
  ERR_READ,
  ERR_INCORRECT_TYPE,
  ERR_UNKNOWN
};

enum ValueType {
  INT,
  STRING
};


// Manager Interface used to mange settings
[ServiceName="device_settings::DeviceSettings"]
interface DeviceSettingsManager {
  GetInteger(string key) => (int64 val, Status s);

  GetString(string key) => (string val, Status s);

  // Return false on database error and true on success.
  SetInteger(string key, int64 val) => (bool result);

  // Return false on database error and true on success.
  SetString(string key, string val) => (bool result);

  // watcher called when a settings changes
  // Return Status::OK, Status::ERR_INVALID_SETTING or Status::ERR_UNKNOWN
  Watch(string key, DeviceSettingsWatcher watcher) => (Status status);
};

// Watcher on battery status
interface DeviceSettingsWatcher {
  OnChangeSettings(ValueType type);
};