| // Copyright 2012 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef COMPONENTS_WEB_RESOURCE_PROMO_RESOURCE_SERVICE_H_ |
| #define COMPONENTS_WEB_RESOURCE_PROMO_RESOURCE_SERVICE_H_ |
| |
| #include <stdint.h> |
| |
| #include <string> |
| |
| #include "base/callback_forward.h" |
| #include "base/callback_list.h" |
| #include "base/macros.h" |
| #include "base/memory/weak_ptr.h" |
| #include "components/web_resource/web_resource_service.h" |
| |
| class PrefRegistrySimple; |
| class PrefService; |
| |
| namespace base { |
| class DictionaryValue; |
| } |
| |
| namespace user_prefs { |
| class PrefRegistrySyncable; |
| } |
| |
| namespace version_info { |
| enum class Channel; |
| } |
| |
| namespace web_resource { |
| |
| class NotificationPromo; |
| |
| // A PromoResourceService fetches data from a web resource server to be used to |
| // dynamically change the appearance of the New Tab Page. For example, it has |
| // been used to fetch "tips" to be displayed on the NTP, or to display |
| // promotional messages to certain groups of Chrome users. |
| class PromoResourceService : public WebResourceService { |
| public: |
| using StateChangedCallbackList = base::CallbackList<void()>; |
| using StateChangedSubscription = StateChangedCallbackList::Subscription; |
| |
| static void RegisterPrefs(PrefRegistrySimple* registry); |
| static void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry); |
| static void MigrateUserPrefs(PrefService* user_prefs); |
| |
| PromoResourceService(PrefService* local_state, |
| version_info::Channel channel, |
| const std::string& application_locale, |
| net::URLRequestContextGetter* request_context, |
| const char* disable_network_switch, |
| const ParseJSONCallback& parse_json_callback); |
| ~PromoResourceService() override; |
| |
| // Registers a callback called when the state of a web resource has been |
| // changed. A resource may have been added, removed, or altered. |
| scoped_ptr<StateChangedSubscription> RegisterStateChangedCallback( |
| const base::Closure& closure); |
| |
| private: |
| // Schedule a notification that a web resource is either going to become |
| // available or be no longer valid. |
| void ScheduleNotification(const NotificationPromo& notification_promo); |
| |
| // Schedules the initial notification for when the web resource is going |
| // to become available or no longer valid. This performs a few additional |
| // checks than ScheduleNotification, namely it schedules updates immediately |
| // if the promo service or Chrome locale has changed. |
| void ScheduleNotificationOnInit(); |
| |
| // If delay_ms is positive, schedule notification with the delay. |
| // If delay_ms is 0, notify immediately by calling WebResourceStateChange(). |
| // If delay_ms is negative, do nothing. |
| void PostNotification(int64_t delay_ms); |
| |
| // Notify listeners that the state of a web resource has changed. |
| void PromoResourceStateChange(); |
| |
| // WebResourceService override to process the parsed information. |
| void Unpack(const base::DictionaryValue& parsed_json) override; |
| |
| // List of callbacks called when the state of a web resource has changed. |
| StateChangedCallbackList callback_list_; |
| |
| // Allows the creation of tasks to send a notification. |
| // This allows the PromoResourceService to notify the New Tab Page immediately |
| // when a new web resource should be shown or removed. |
| base::WeakPtrFactory<PromoResourceService> weak_ptr_factory_; |
| |
| DISALLOW_COPY_AND_ASSIGN(PromoResourceService); |
| }; |
| |
| } // namespace web_resource |
| |
| #endif // COMPONENTS_WEB_RESOURCE_PROMO_RESOURCE_SERVICE_H_ |