| // Copyright 2016 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_NTP_TILES_POPULAR_SITES_IMPL_H_ |
| #define COMPONENTS_NTP_TILES_POPULAR_SITES_IMPL_H_ |
| |
| #include <memory> |
| #include <string> |
| #include <vector> |
| |
| #include "base/callback.h" |
| #include "base/files/file_path.h" |
| #include "base/macros.h" |
| #include "base/memory/weak_ptr.h" |
| #include "base/strings/string16.h" |
| #include "components/ntp_tiles/popular_sites.h" |
| #include "net/url_request/url_fetcher_delegate.h" |
| #include "url/gurl.h" |
| |
| namespace base { |
| class TaskRunner; |
| class SequencedWorkerPool; |
| class Value; |
| } |
| |
| namespace net { |
| class URLRequestContextGetter; |
| } |
| |
| namespace user_prefs { |
| class PrefRegistrySyncable; |
| } |
| |
| namespace variations { |
| class VariationsService; |
| } |
| |
| class PrefService; |
| class TemplateURLService; |
| |
| namespace ntp_tiles { |
| |
| using ParseJSONCallback = base::Callback<void( |
| const std::string& unsafe_json, |
| const base::Callback<void(std::unique_ptr<base::Value>)>& success_callback, |
| const base::Callback<void(const std::string&)>& error_callback)>; |
| |
| // Actual (non-test) implementation of the PopularSites interface. Caches the |
| // downloaded file on disk to avoid re-downloading on every startup. |
| class PopularSitesImpl : public PopularSites, public net::URLFetcherDelegate { |
| public: |
| PopularSitesImpl( |
| const scoped_refptr<base::SequencedWorkerPool>& blocking_pool, |
| PrefService* prefs, |
| const TemplateURLService* template_url_service, |
| variations::VariationsService* variations_service, |
| net::URLRequestContextGetter* download_context, |
| const base::FilePath& directory, |
| ParseJSONCallback parse_json); |
| |
| ~PopularSitesImpl() override; |
| |
| // PopularSites implementation. |
| bool MaybeStartFetch(bool force_download, |
| const FinishedCallback& callback) override; |
| const SitesVector& sites() const override; |
| GURL GetLastURLFetched() const override; |
| GURL GetURLToFetch() override; |
| std::string GetDirectoryToFetch() override; |
| std::string GetCountryToFetch() override; |
| std::string GetVersionToFetch() override; |
| const base::ListValue* GetCachedJson() override; |
| |
| // Register preferences used by this class. |
| static void RegisterProfilePrefs( |
| user_prefs::PrefRegistrySyncable* user_prefs); |
| |
| private: |
| // Fetch the popular sites at the given URL, overwriting any cache in prefs |
| // that already exists. |
| void FetchPopularSites(); |
| |
| // net::URLFetcherDelegate implementation. |
| void OnURLFetchComplete(const net::URLFetcher* source) override; |
| |
| void OnJsonParsed(std::unique_ptr<base::Value> json); |
| void OnJsonParseFailed(const std::string& error_message); |
| void OnDownloadFailed(); |
| |
| // Parameters set from constructor. |
| scoped_refptr<base::TaskRunner> const blocking_runner_; |
| PrefService* const prefs_; |
| const TemplateURLService* const template_url_service_; |
| variations::VariationsService* const variations_; |
| net::URLRequestContextGetter* const download_context_; |
| ParseJSONCallback parse_json_; |
| |
| // Set by MaybeStartFetch() and called after fetch completes. |
| FinishedCallback callback_; |
| |
| std::unique_ptr<net::URLFetcher> fetcher_; |
| bool is_fallback_; |
| SitesVector sites_; |
| GURL pending_url_; |
| |
| base::WeakPtrFactory<PopularSitesImpl> weak_ptr_factory_; |
| |
| DISALLOW_COPY_AND_ASSIGN(PopularSitesImpl); |
| }; |
| |
| } // namespace ntp_tiles |
| |
| #endif // COMPONENTS_NTP_TILES_POPULAR_SITES_IMPL_H_ |