chrome/browser/chromeos/login/user_image_manager.h

   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_USER_IMAGE_MANAGER_H_
   6 #define CHROME_BROWSER_CHROMEOS_LOGIN_USER_IMAGE_MANAGER_H_
   7
   8 #include <string>
   9
  10 #include "chrome/browser/chromeos/login/user.h"
  11
  12 class PrefRegistrySimple;
  13
  14 namespace base {
  15 class FilePath;
  16 }
  17
  18 namespace gfx {
  19 class ImageSkia;
  20 }
  21
  22 namespace chromeos {
  23
  24 class UserImage;
  25 class UserImageSyncObserver;
  26
  27 // Base class that provides a mechanism for updating user images.
  28 // There is an instance of this class for each user in the system.
  29 class UserImageManager {
  30  public:
  31   // Registers user image manager preferences.
  32   static void RegisterPrefs(PrefRegistrySimple* registry);
  33
  34   explicit UserImageManager(const std::string& user_id);
  35   virtual ~UserImageManager();
  36
  37   // Loads user image data from Local State.
  38   virtual void LoadUserImage() = 0;
  39
  40   // Indicates that a user has just logged in.
  41   virtual void UserLoggedIn(bool user_is_new, bool user_is_local) = 0;
  42
  43   // Sets user image to the default image with index |image_index|, sends
  44   // LOGIN_USER_IMAGE_CHANGED notification and updates Local State.
  45   virtual void SaveUserDefaultImageIndex(int image_index) = 0;
  46
  47   // Saves image to file, sends LOGIN_USER_IMAGE_CHANGED notification and
  48   // updates Local State.
  49   virtual void SaveUserImage(const UserImage& user_image) = 0;
  50
  51   // Tries to load user image from disk; if successful, sets it for the user,
  52   // sends LOGIN_USER_IMAGE_CHANGED notification and updates Local State.
  53   virtual void SaveUserImageFromFile(const base::FilePath& path) = 0;
  54
  55   // Sets profile image as user image for the user, sends
  56   // LOGIN_USER_IMAGE_CHANGED notification and updates Local State. If
  57   // the user is not logged-in or the last |DownloadProfileImage| call
  58   // has failed, a default grey avatar will be used until the user logs
  59   // in and profile image is downloaded successfully.
  60   virtual void SaveUserImageFromProfileImage() = 0;
  61
  62   // Deletes user image and the corresponding image file.
  63   virtual void DeleteUserImage() = 0;
  64
  65   // Starts downloading the profile image for the user.  If user's image
  66   // index is |kProfileImageIndex|, newly downloaded image is immediately
  67   // set as user's current picture.  |reason| is an arbitrary string
  68   // (used to report UMA histograms with download times).
  69   virtual void DownloadProfileImage(const std::string& reason) = 0;
  70
  71   // Returns the result of the last successful profile image download, if any.
  72   // Otherwise, returns an empty bitmap.
  73   virtual const gfx::ImageSkia& DownloadedProfileImage() const = 0;
  74
  75   // Returns sync observer attached to the user. Returns NULL if current
  76   // user can't sync images or user is not logged in.
  77   virtual UserImageSyncObserver* GetSyncObserver() const = 0;
  78
  79   // Unregisters preference observers before browser process shutdown.
  80   // Also cancels any profile image download in progress.
  81   virtual void Shutdown() = 0;
  82
  83   // Invoked when an external data reference is set for the user.
  84   virtual void OnExternalDataSet(const std::string& policy) = 0;
  85
  86   // Invoked when the external data reference is cleared for the user.
  87   virtual void OnExternalDataCleared(const std::string& policy) = 0;
  88
  89   // Invoked when the external data referenced for the user has been
  90   // fetched.  Failed fetches are retried and the method is called only
  91   // when a fetch eventually succeeds. If a fetch fails permanently
  92   // (e.g. because the external data reference specifies an invalid URL),
  93   // the method is not called at all.
  94   virtual void OnExternalDataFetched(const std::string& policy,
  95                                      scoped_ptr<std::string> data) = 0;
  96
  97  protected:
  98   const std::string& user_id() const { return user_id_; }
  99
 100   // ID of user which images are managed by current instance of
 101   // UserImageManager.
 102   const std::string user_id_;
 103 };
 104
 105 }  // namespace chromeos
 106
 107 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_USER_IMAGE_MANAGER_H_