version_info_updater.h revision 2a99a7e74a7f215066514fe81d2bfa6639d9eddd 
1// Copyright (c) 2012 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_LOGIN_VERSION_INFO_UPDATER_H_
6#define CHROME_BROWSER_CHROMEOS_LOGIN_VERSION_INFO_UPDATER_H_
7
8#include <string>
9
10#include "base/memory/weak_ptr.h"
11#include "chrome/browser/chromeos/boot_times_loader.h"
12#include "chrome/browser/chromeos/version_loader.h"
13#include "chrome/browser/policy/cloud/cloud_policy_store.h"
14#include "content/public/browser/notification_observer.h"
15
16namespace chromeos {
17
18class CrosSettings;
19
20// Fetches all info we want to show on OOBE/Login screens about system
21// version, boot times and cloud policy.
22class VersionInfoUpdater : public policy::CloudPolicyStore::Observer,
23                           public content::NotificationObserver {
24 public:
25  class Delegate {
26   public:
27    virtual ~Delegate() {}
28
29    // Called when OS version label should be updated.
30    virtual void OnOSVersionLabelTextUpdated(
31        const std::string& os_version_label_text) = 0;
32
33    // Called when boot times label should be updated.
34    virtual void OnBootTimesLabelTextUpdated(
35        const std::string& boot_times_label_text) = 0;
36
37    // Called when the enterprise info notice should be updated.
38    virtual void OnEnterpriseInfoUpdated(
39        const std::string& enterprise_info) = 0;
40  };
41
42  explicit VersionInfoUpdater(Delegate* delegate);
43  virtual ~VersionInfoUpdater();
44
45  // Sets delegate.
46  void set_delegate(Delegate* delegate) { delegate_ = delegate; }
47
48  // Starts fetching version info. The delegate will be notified when update
49  // is received.
50  void StartUpdate(bool is_official_build);
51
52 private:
53  // policy::CloudPolicyStore::Observer interface:
54  virtual void OnStoreLoaded(policy::CloudPolicyStore* store) OVERRIDE;
55  virtual void OnStoreError(policy::CloudPolicyStore* store) OVERRIDE;
56
57  // content::NotificationObserver interface.
58  virtual void Observe(
59      int type,
60      const content::NotificationSource& source,
61      const content::NotificationDetails& details) OVERRIDE;
62
63  // Update the version label.
64  void UpdateVersionLabel();
65
66  // Check and update enterprise domain.
67  void UpdateEnterpriseInfo();
68
69  // Set enterprise domain name.
70  void SetEnterpriseInfo(const std::string& domain_name);
71
72  // Callback from chromeos::VersionLoader giving the version.
73  void OnVersion(const std::string& version);
74  // Callback from chromeos::InfoLoader giving the boot times.
75  void OnBootTimes(const BootTimesLoader::BootTimes& boot_times);
76  // Null callback from chromeos::InfoLoader.
77  void OnBootTimesNoop(const BootTimesLoader::BootTimes& boot_times);
78
79  // Handles asynchronously loading the version.
80  VersionLoader version_loader_;
81  // Handles asynchronously loading the boot times.
82  BootTimesLoader boot_times_loader_;
83  // Used to request version and boot times.
84  CancelableTaskTracker tracker_;
85
86  // Information pieces for version label.
87  std::string version_text_;
88
89  // Full text for the OS version label.
90  std::string os_version_label_text_;
91
92  chromeos::CrosSettings* cros_settings_;
93
94  Delegate* delegate_;
95
96  // Weak pointer factory so we can give our callbacks for invocation
97  // at a later time without worrying that they will actually try to
98  // happen after the lifetime of this object.
99  base::WeakPtrFactory<VersionInfoUpdater> weak_pointer_factory_;
100
101  DISALLOW_COPY_AND_ASSIGN(VersionInfoUpdater);
102};
103
104}  // namespace chromeos
105
106#endif  // CHROME_BROWSER_CHROMEOS_LOGIN_VERSION_INFO_UPDATER_H_
107