| // Copyright 2015 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_H_ |
| #define COMPONENTS_NTP_TILES_POPULAR_SITES_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 "net/url_request/url_fetcher_delegate.h" |
| #include "url/gurl.h" |
| |
| namespace base { |
| class Value; |
| } |
| |
| namespace net { |
| class URLRequestContextGetter; |
| } |
| |
| namespace user_prefs { |
| class PrefRegistrySyncable; |
| } |
| |
| namespace variations { |
| class VariationsService; |
| } |
| |
| class PrefService; |
| class TemplateURLService; |
| |
| namespace ntp_tiles { |
| |
| // Downloads and provides a list of suggested popular sites, for display on |
| // the NTP when there are not enough personalized suggestions. Caches the |
| // downloaded file on disk to avoid re-downloading on every startup. |
| class PopularSites : public net::URLFetcherDelegate { |
| public: |
| struct Site { |
| Site(const base::string16& title, |
| const GURL& url, |
| const GURL& favicon_url, |
| const GURL& large_icon_url, |
| const GURL& thumbnail_url); |
| Site(const Site& other); |
| ~Site(); |
| |
| base::string16 title; |
| GURL url; |
| GURL favicon_url; |
| GURL large_icon_url; |
| GURL thumbnail_url; |
| }; |
| |
| using FinishedCallback = base::Callback<void(bool /* success */)>; |
| |
| // When the suggestions have been fetched (from cache or URL) and parsed, |
| // invokes |callback|, on the same thread as the caller. |
| // |
| // Set |force_download| to enforce re-downloading the suggestions file, even |
| // if it already exists on disk. |
| PopularSites(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, |
| bool force_download, |
| const FinishedCallback& callback); |
| |
| ~PopularSites() override; |
| |
| const std::vector<Site>& sites() const { return sites_; } |
| |
| // The URL of the file that was last downloaded. |
| GURL LastURL() const; |
| |
| const base::FilePath& local_path() const { return local_path_; } |
| |
| // Register preferences used by this class. |
| static void RegisterProfilePrefs( |
| user_prefs::PrefRegistrySyncable* user_prefs); |
| |
| private: |
| void OnReadFileDone(std::unique_ptr<std::string> data, bool success); |
| |
| // Fetch the popular sites at the given URL, overwriting any file 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 OnFileWriteDone(std::unique_ptr<base::Value> json, bool success); |
| void ParseSiteList(std::unique_ptr<base::Value> json); |
| void OnDownloadFailed(); |
| |
| FinishedCallback callback_; |
| std::unique_ptr<net::URLFetcher> fetcher_; |
| bool is_fallback_; |
| std::vector<Site> sites_; |
| GURL pending_url_; |
| |
| base::FilePath local_path_; |
| |
| PrefService* prefs_; |
| net::URLRequestContextGetter* download_context_; |
| |
| scoped_refptr<base::TaskRunner> blocking_runner_; |
| |
| base::WeakPtrFactory<PopularSites> weak_ptr_factory_; |
| |
| DISALLOW_COPY_AND_ASSIGN(PopularSites); |
| }; |
| |
| } // namespace ntp_tiles |
| |
| #endif // COMPONENTS_NTP_TILES_POPULAR_SITES_H_ |