1// Copyright 2014 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_EASY_UNLOCK_SHORT_LIVED_USER_CONTEXT_H_
6#define CHROME_BROWSER_CHROMEOS_LOGIN_EASY_UNLOCK_SHORT_LIVED_USER_CONTEXT_H_
7
8#include "apps/app_lifetime_monitor.h"
9#include "base/memory/scoped_ptr.h"
10#include "base/memory/weak_ptr.h"
11
12namespace base {
13class TaskRunner;
14}
15
16namespace chromeos {
17
18class UserContext;
19
20// Stores the UserContext of an authentication operation on the sign-in/lock
21// screen, which is used to generate the keys for Easy Sign-in.
22// The lifetime of the user context is bound the the setup app window. As a
23// fail-safe, the user context will also be deleted after a set period of time
24// in case the app is left open indefintely.
25class ShortLivedUserContext : public apps::AppLifetimeMonitor::Observer {
26 public:
27  ShortLivedUserContext(const UserContext& user_context,
28                        apps::AppLifetimeMonitor* app_lifetime_monitor,
29                        base::TaskRunner* task_runner);
30  virtual ~ShortLivedUserContext();
31
32  // The UserContext returned here can be NULL if its time-to-live has expired.
33  UserContext* user_context() { return user_context_.get(); }
34
35 private:
36  void Reset();
37
38  // apps::AppLifetimeMonitor::Observer:
39  virtual void OnAppDeactivated(Profile* profile,
40                                const std::string& app_id) override;
41
42  scoped_ptr<UserContext> user_context_;
43
44  apps::AppLifetimeMonitor* app_lifetime_monitor_;
45
46  base::WeakPtrFactory<ShortLivedUserContext> weak_ptr_factory_;
47
48  DISALLOW_COPY_AND_ASSIGN(ShortLivedUserContext);
49};
50
51}  // namespace chromeos
52
53#endif  // CHROME_BROWSER_CHROMEOS_LOGIN_EASY_UNLOCK_SHORT_LIVED_USER_CONTEXT_H_
54