// Copyright (c) 2012 The Chromium OS 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 LIBBRILLO_POLICY_DEVICE_POLICY_H_
#define LIBBRILLO_POLICY_DEVICE_POLICY_H_

#include <stdint.h>

#include <set>
#include <string>
#include <vector>

#include <base/macros.h>

#pragma GCC visibility push(default)

namespace policy {

// This class holds device settings that are to be enforced across all users.
// It is also responsible for loading the policy blob from disk and verifying
// the signature against the owner's key.
//
// This class defines the interface for querying device policy on ChromeOS.
// The implementation is hidden in DevicePolicyImpl to prevent protobuf
// definition from leaking into the libraries using this interface.
class DevicePolicy {
 public:
  // Identifiers of a USB device or device family.
  struct UsbDeviceId {
    // USB Vendor Identifier (aka idVendor).
    uint16_t vendor_id;

    // USB Product Identifier (aka idProduct).
    uint16_t product_id;
  };

  DevicePolicy();
  virtual ~DevicePolicy();

  // Load the signed policy off of disk into |policy_|.
  // Returns true unless there is a policy on disk and loading it fails.
  virtual bool LoadPolicy() = 0;

  // Writes the value of the DevicePolicyRefreshRate policy in |rate|. Returns
  // true on success.
  virtual bool GetPolicyRefreshRate(int* rate) const = 0;

  // Writes the value of the UserWhitelist policy in |user_whitelist|. Returns
  // true on success.
  virtual bool GetUserWhitelist(
      std::vector<std::string>* user_whitelist) const = 0;

  // Writes the value of the GuestModeEnabled policy in |guest_mode_enabled|.
  // Returns true on success.
  virtual bool GetGuestModeEnabled(bool* guest_mode_enabled) const = 0;

  // Writes the value of the CameraEnabled policy in |camera_enabled|. Returns
  // true on success.
  virtual bool GetCameraEnabled(bool* camera_enabled) const = 0;

  // Writes the value of the ShowUserNamesOnSignIn policy in |show_user_names|.
  // Returns true on success.
  virtual bool GetShowUserNames(bool* show_user_names) const = 0;

  // Writes the value of the DataRoamingEnabled policy in |data_roaming_enabled|
  // Returns true on success.
  virtual bool GetDataRoamingEnabled(bool* data_roaming_enabled) const = 0;

  // Writes the value of the AllowNewUsers policy in |allow_new_users|. Returns
  // true on success.
  virtual bool GetAllowNewUsers(bool* allow_new_users) const = 0;

  // Writes the value of MetricEnabled policy in |metrics_enabled|. Returns true
  // on success.
  virtual bool GetMetricsEnabled(bool* metrics_enabled) const = 0;

  // Writes the value of ReportVersionInfo policy in |report_version_info|.
  // Returns true on success.
  virtual bool GetReportVersionInfo(bool* report_version_info) const = 0;

  // Writes the value of ReportActivityTimes policy in |report_activity_times|.
  // Returns true on success.
  virtual bool GetReportActivityTimes(bool* report_activity_times) const = 0;

  // Writes the value of ReportBootMode policy in |report_boot_mode|. Returns
  // true on success.
  virtual bool GetReportBootMode(bool* report_boot_mode) const = 0;

  // Writes the value of the EphemeralUsersEnabled policy in
  // |ephemeral_users_enabled|. Returns true on success.
  virtual bool GetEphemeralUsersEnabled(
      bool* ephemeral_users_enabled) const =  0;

  // Writes the value of the release channel policy in |release_channel|.
  // Returns true on success.
  virtual bool GetReleaseChannel(std::string* release_channel) const = 0;

  // Writes the value of the release_channel_delegated policy in
  // |release_channel_delegated|. Returns true on success.
  virtual bool GetReleaseChannelDelegated(
      bool* release_channel_delegated) const = 0;

  // Writes the value of the update_disabled policy in |update_disabled|.
  // Returns true on success.
  virtual bool GetUpdateDisabled(bool* update_disabled) const = 0;

  // Writes the value of the target_version_prefix policy in
  // |target_version_prefix|. Returns true on success.
  virtual bool GetTargetVersionPrefix(
      std::string* target_version_prefix) const = 0;

  // Writes the value of the scatter_factor_in_seconds policy in
  // |scatter_factor_in_seconds|. Returns true on success.
  virtual bool GetScatterFactorInSeconds(
      int64_t* scatter_factor_in_seconds) const = 0;

  // Writes the connection types on which updates are allowed to
  // |connection_types|. The identifiers returned are intended to be consistent
  // with what the connection manager users: ethernet, wifi, wimax, bluetooth,
  // cellular.
  virtual bool GetAllowedConnectionTypesForUpdate(
      std::set<std::string>* connection_types) const = 0;

  // Writes the value of the OpenNetworkConfiguration policy in
  // |open_network_configuration|. Returns true on success.
  virtual bool GetOpenNetworkConfiguration(
      std::string* open_network_configuration) const = 0;

  // Writes the name of the device owner in |owner|. For enterprise enrolled
  // devices, this will be an empty string.
  // Returns true on success.
  virtual bool GetOwner(std::string* owner) const = 0;

  // Write the value of http_downloads_enabled policy in
  // |http_downloads_enabled|. Returns true on success.
  virtual bool GetHttpDownloadsEnabled(bool* http_downloads_enabled) const = 0;

  // Writes the value of au_p2p_enabled policy in
  // |au_p2p_enabled|. Returns true on success.
  virtual bool GetAuP2PEnabled(bool* au_p2p_enabled) const = 0;

  // Writes the value of allow_kiosk_app_control_chrome_version policy in
  // |allow_kiosk_app_control_chrome_version|. Returns true on success.
  virtual bool GetAllowKioskAppControlChromeVersion(
      bool* allow_kiosk_app_control_chrome_version) const = 0;

  // Writes the value of the UsbDetachableWhitelist policy in |usb_whitelist|.
  // Returns true on success.
  virtual bool GetUsbDetachableWhitelist(
      std::vector<UsbDeviceId>* usb_whitelist) const = 0;

 private:
  // Verifies that the policy files are owned by root and exist.
  virtual bool VerifyPolicyFiles() = 0;

  // Verifies that the policy signature is correct.
  virtual bool VerifyPolicySignature() = 0;

  DISALLOW_COPY_AND_ASSIGN(DevicePolicy);
};
}  // namespace policy

#pragma GCC visibility pop

#endif  // LIBBRILLO_POLICY_DEVICE_POLICY_H_