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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_UI_WEBUI_CHROMEOS_LOGIN_NETWORK_STATE_INFORMER_H_
6 #define CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_NETWORK_STATE_INFORMER_H_
7 
8 #include <map>
9 #include <string>
10 
11 #include "base/cancelable_callback.h"
12 #include "base/compiler_specific.h"
13 #include "base/memory/ref_counted.h"
14 #include "base/memory/weak_ptr.h"
15 #include "base/observer_list.h"
16 #include "chrome/browser/chromeos/login/screens/error_screen_actor.h"
17 #include "chrome/browser/chromeos/login/ui/captive_portal_window_proxy.h"
18 #include "chromeos/network/network_state_handler_observer.h"
19 #include "chromeos/network/portal_detector/network_portal_detector.h"
20 #include "content/public/browser/notification_observer.h"
21 #include "content/public/browser/notification_registrar.h"
22 #include "content/public/browser/notification_service.h"
23 
24 namespace chromeos {
25 
26 // Class which observes network state changes and calls registered callbacks.
27 // State is considered changed if connection or the active network has been
28 // changed. Also, it answers to the requests about current network state.
29 class NetworkStateInformer
30     : public chromeos::NetworkStateHandlerObserver,
31       public chromeos::NetworkPortalDetector::Observer,
32       public content::NotificationObserver,
33       public CaptivePortalWindowProxyDelegate,
34       public base::RefCounted<NetworkStateInformer> {
35  public:
36   enum State {
37     OFFLINE = 0,
38     ONLINE,
39     CAPTIVE_PORTAL,
40     CONNECTING,
41     PROXY_AUTH_REQUIRED,
42     UNKNOWN
43   };
44 
45   class NetworkStateInformerObserver {
46    public:
NetworkStateInformerObserver()47     NetworkStateInformerObserver() {}
~NetworkStateInformerObserver()48     virtual ~NetworkStateInformerObserver() {}
49 
50     virtual void UpdateState(ErrorScreenActor::ErrorReason reason) = 0;
OnNetworkReady()51     virtual void OnNetworkReady() {}
52   };
53 
54   NetworkStateInformer();
55 
56   void Init();
57 
58   // Adds observer to be notified when network state has been changed.
59   void AddObserver(NetworkStateInformerObserver* observer);
60 
61   // Removes observer.
62   void RemoveObserver(NetworkStateInformerObserver* observer);
63 
64   // NetworkStateHandlerObserver implementation:
65   virtual void DefaultNetworkChanged(const NetworkState* network) OVERRIDE;
66 
67   // NetworkPortalDetector::Observer implementation:
68   virtual void OnPortalDetectionCompleted(
69       const NetworkState* network,
70       const NetworkPortalDetector::CaptivePortalState& state) OVERRIDE;
71 
72   // content::NotificationObserver implementation.
73   virtual void Observe(int type,
74                        const content::NotificationSource& source,
75                        const content::NotificationDetails& details) OVERRIDE;
76 
77   // CaptivePortalWindowProxyDelegate implementation:
78   virtual void OnPortalDetected() OVERRIDE;
79 
state()80   State state() const { return state_; }
network_path()81   std::string network_path() const { return network_path_; }
network_type()82   std::string network_type() const { return network_type_; }
83 
84   static const char* StatusString(State state);
85 
86  private:
87   friend class base::RefCounted<NetworkStateInformer>;
88 
89   virtual ~NetworkStateInformer();
90 
91   bool UpdateState();
92 
93   void UpdateStateAndNotify();
94 
95   void SendStateToObservers(ErrorScreenActor::ErrorReason reason);
96 
97   State state_;
98   std::string network_path_;
99   std::string network_type_;
100 
101   ObserverList<NetworkStateInformerObserver> observers_;
102   content::NotificationRegistrar registrar_;
103 
104   base::WeakPtrFactory<NetworkStateInformer> weak_ptr_factory_;
105 };
106 
107 }  // namespace chromeos
108 
109 #endif  // CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_NETWORK_STATE_INFORMER_H_
110