chrome/browser/ui/webui/ntp/android/promo_handler.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_UI_WEBUI_NTP_ANDROID_PROMO_HANDLER_H_
   6 #define CHROME_BROWSER_UI_WEBUI_NTP_ANDROID_PROMO_HANDLER_H_
   7
   8 #include "content/public/browser/notification_observer.h"
   9 #include "content/public/browser/notification_registrar.h"
  10 #include "content/public/browser/web_ui_message_handler.h"
  11
  12 namespace base {
  13 class DictionaryValue;
  14 class ListValue;
  15 }
  16
  17 namespace user_prefs {
  18 class PrefRegistrySyncable;
  19 }
  20
  21 // The handler for JavaScript messages related to the Android NTP promo.
  22 class PromoHandler : public content::WebUIMessageHandler,
  23                      public content::NotificationObserver {
  24  public:
  25   PromoHandler();
  26   virtual ~PromoHandler();
  27
  28   // WebUIMessageHandler implementation.
  29   virtual void RegisterMessages() OVERRIDE;
  30
  31   // Register preferences.
  32   static void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry);
  33
  34  private:
  35   // NotificationObserver override and implementation.
  36   virtual void Observe(int type,
  37                        const content::NotificationSource& source,
  38                        const content::NotificationDetails& details) OVERRIDE;
  39
  40   // Callback for the "promoSendEmail" message.
  41   // |args| is a list [ subject, body, app-chooser-message ].
  42   void HandlePromoSendEmail(const base::ListValue* args);
  43
  44   // Callback for the "promoActionTriggered" message.
  45   // No arguments.
  46   void HandlePromoActionTriggered(const base::ListValue* args);
  47
  48   // Callback for the "promoDisabled" message.
  49   // No arguments.
  50   void HandlePromoDisabled(const base::ListValue* args);
  51
  52   // Callback for the "getPromotions" message.
  53   // No arguments.
  54   void HandleGetPromotions(const base::ListValue* args);
  55
  56   // Callback for the "recordImpression" message.
  57   // |args| is a list with a name of a page to record an impression from.
  58   void HandleRecordImpression(const base::ListValue* args);
  59
  60   // Gathers the promotion information and updates the page.
  61   void InjectPromoDecorations();
  62
  63   // Records an impression; could trigger a refresh if max_views are exceeded.
  64   void RecordPromotionImpression(const std::string& id);
  65
  66   // Fetches the active promotion and defines what should be passed to JS.
  67   // Returns true if the promotion should be shown and the |result| is ready.
  68   bool FetchPromotion(base::DictionaryValue* result);
  69
  70   // Returns true if the Chrome Promo is allowed.
  71   bool DoesChromePromoMatchCurrentSync(
  72       bool promo_requires_sync,
  73       bool promo_requires_no_active_desktop_sync_sessions);
  74
  75   // Updates the profile preference if any desktop session was discovered.
  76   void CheckDesktopSessions();
  77
  78   // Registrar to receive notification on promo changes.
  79   content::NotificationRegistrar registrar_;
  80
  81   DISALLOW_COPY_AND_ASSIGN(PromoHandler);
  82 };
  83
  84 #endif  // CHROME_BROWSER_UI_WEBUI_NTP_ANDROID_PROMO_HANDLER_H_