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      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 
     16 namespace chromeos {
     17 
     18 class CrosSettings;
     19 
     20 // Fetches all info we want to show on OOBE/Login screens about system
     21 // version, boot times and cloud policy.
     22 class 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 the enterprise info notice should be updated.
     34     virtual void OnEnterpriseInfoUpdated(
     35         const std::string& enterprise_info) = 0;
     36   };
     37 
     38   explicit VersionInfoUpdater(Delegate* delegate);
     39   virtual ~VersionInfoUpdater();
     40 
     41   // Sets delegate.
     42   void set_delegate(Delegate* delegate) { delegate_ = delegate; }
     43 
     44   // Starts fetching version info. The delegate will be notified when update
     45   // is received.
     46   void StartUpdate(bool is_official_build);
     47 
     48  private:
     49   // policy::CloudPolicyStore::Observer interface:
     50   virtual void OnStoreLoaded(policy::CloudPolicyStore* store) OVERRIDE;
     51   virtual void OnStoreError(policy::CloudPolicyStore* store) OVERRIDE;
     52 
     53   // content::NotificationObserver interface.
     54   virtual void Observe(
     55       int type,
     56       const content::NotificationSource& source,
     57       const content::NotificationDetails& details) OVERRIDE;
     58 
     59   // Update the version label.
     60   void UpdateVersionLabel();
     61 
     62   // Check and update enterprise domain.
     63   void UpdateEnterpriseInfo();
     64 
     65   // Set enterprise domain name.
     66   void SetEnterpriseInfo(const std::string& domain_name);
     67 
     68   // Callback from chromeos::VersionLoader giving the version.
     69   void OnVersion(const std::string& version);
     70 
     71   // Handles asynchronously loading the version.
     72   VersionLoader version_loader_;
     73   // Handles asynchronously loading the boot times.
     74   BootTimesLoader boot_times_loader_;
     75   // Used to request version and boot times.
     76   CancelableTaskTracker tracker_;
     77 
     78   // Information pieces for version label.
     79   std::string version_text_;
     80 
     81   // Full text for the OS version label.
     82   std::string os_version_label_text_;
     83 
     84   chromeos::CrosSettings* cros_settings_;
     85 
     86   Delegate* delegate_;
     87 
     88   // Weak pointer factory so we can give our callbacks for invocation
     89   // at a later time without worrying that they will actually try to
     90   // happen after the lifetime of this object.
     91   base::WeakPtrFactory<VersionInfoUpdater> weak_pointer_factory_;
     92 
     93   DISALLOW_COPY_AND_ASSIGN(VersionInfoUpdater);
     94 };
     95 
     96 }  // namespace chromeos
     97 
     98 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_VERSION_INFO_UPDATER_H_
     99