| // Copyright 2017 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 CHROME_BROWSER_SEARCH_ONE_GOOGLE_BAR_ONE_GOOGLE_BAR_SERVICE_H_ |
| #define CHROME_BROWSER_SEARCH_ONE_GOOGLE_BAR_ONE_GOOGLE_BAR_SERVICE_H_ |
| |
| #include <memory> |
| |
| #include "base/observer_list.h" |
| #include "base/optional.h" |
| #include "chrome/browser/search/one_google_bar/one_google_bar_data.h" |
| #include "chrome/browser/search/one_google_bar/one_google_bar_service_observer.h" |
| #include "components/keyed_service/core/keyed_service.h" |
| |
| class OneGoogleBarFetcher; |
| class SigninManagerBase; |
| |
| // A service that downloads, caches, and hands out OneGoogleBarData. It never |
| // initiates a download automatically, only when Refresh is called. When the |
| // user signs in or out, the cached value is cleared. |
| class OneGoogleBarService : public KeyedService { |
| public: |
| OneGoogleBarService(SigninManagerBase* signin_manager, |
| std::unique_ptr<OneGoogleBarFetcher> fetcher); |
| ~OneGoogleBarService() override; |
| |
| // KeyedService implementation. |
| void Shutdown() override; |
| |
| // Returns the currently cached OneGoogleBarData, if any. |
| const base::Optional<OneGoogleBarData>& one_google_bar_data() const { |
| return one_google_bar_data_; |
| } |
| |
| // Requests an asynchronous refresh from the network. After the update |
| // completes, the observers will be notified only if something changed. |
| void Refresh(); |
| |
| // Add/remove observers. All observers must unregister themselves before the |
| // OneGoogleBarService is destroyed. |
| void AddObserver(OneGoogleBarServiceObserver* observer); |
| void RemoveObserver(OneGoogleBarServiceObserver* observer); |
| |
| OneGoogleBarFetcher* fetcher_for_testing() { return fetcher_.get(); } |
| |
| private: |
| class SigninObserver; |
| |
| void SigninStatusChanged(); |
| |
| void OneGoogleBarDataFetched(const base::Optional<OneGoogleBarData>& data); |
| |
| void SetOneGoogleBarData(const base::Optional<OneGoogleBarData>& data); |
| |
| std::unique_ptr<OneGoogleBarFetcher> fetcher_; |
| |
| std::unique_ptr<SigninObserver> signin_observer_; |
| |
| base::ObserverList<OneGoogleBarServiceObserver, true> observers_; |
| |
| base::Optional<OneGoogleBarData> one_google_bar_data_; |
| }; |
| |
| #endif // CHROME_BROWSER_SEARCH_ONE_GOOGLE_BAR_ONE_GOOGLE_BAR_SERVICE_H_ |