update_library.h revision 3345a6884c488ff3a535c2c9acdd33d74b37e311
1// Copyright (c) 2009 The Chromium Authors. All rights reserved. 2// Use of this source code is governed by a BSD-style license that can be 3// found in the LICENSE file. 4 5#ifndef CHROME_BROWSER_CHROMEOS_CROS_UPDATE_LIBRARY_H_ 6#define CHROME_BROWSER_CHROMEOS_CROS_UPDATE_LIBRARY_H_ 7#pragma once 8 9#include <string> 10 11#include "base/observer_list.h" 12#include "base/singleton.h" 13#include "base/time.h" 14#include "cros/chromeos_update_engine.h" 15 16namespace chromeos { 17 18// This interface defines interaction with the ChromeOS update library APIs. 19// Classes can add themselves as observers. Users can get an instance of this 20// library class like this: chromeos::CrosLibrary::Get()->GetUpdateLibrary() 21 22class UpdateLibrary { 23 public: 24 // TODO(seanparent): Should make the UpdateProgress type copyable. 25 // We need to copy it to bind it for a deferred notification. 26 // Modifying the cros library just for that, for a single use case, 27 // isn't worth it. Instead we define this a local Status struct that 28 // is copyable. 29 30 struct Status { 31 Status() 32 : status(UPDATE_STATUS_IDLE), 33 download_progress(0.0), 34 last_checked_time(0), 35 new_size(0) { 36 } 37 38 explicit Status(const UpdateProgress& x) : 39 status(x.status_), 40 download_progress(x.download_progress_), 41 last_checked_time(x.last_checked_time_), 42 new_version(x.new_version_), 43 new_size(x.new_size_) { 44 } 45 46 UpdateStatusOperation status; 47 double download_progress; // 0.0 - 1.0 48 int64_t last_checked_time; // As reported by std::time(). 49 std::string new_version; 50 int64_t new_size; // Valid during DOWNLOADING, in bytes. 51 }; 52 53 class Observer { 54 public: 55 virtual ~Observer() { } 56 virtual void UpdateStatusChanged(UpdateLibrary* library) = 0; 57 }; 58 59// static UpdateLibrary* GetStubImplementation(); 60 61 virtual ~UpdateLibrary() {} 62 virtual void AddObserver(Observer* observer) = 0; 63 virtual void RemoveObserver(Observer* observer) = 0; 64 65 // Initiates update check and returns true if check was initiated. 66 virtual bool CheckForUpdate() = 0; 67 68 // Reboots if update has been performed. 69 virtual bool RebootAfterUpdate() = 0; 70 71 virtual const Status& status() const = 0; 72 73 // Factory function, creates a new instance and returns ownership. 74 // For normal usage, access the singleton via CrosLibrary::Get(). 75 static UpdateLibrary* GetImpl(bool stub); 76}; 77 78} // namespace chromeos 79 80#endif // CHROME_BROWSER_CHROMEOS_CROS_UPDATE_LIBRARY_H_ 81 82