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// 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 CHROME_BROWSER_ANDROID_POPULAR_SITES_H_
#define CHROME_BROWSER_ANDROID_POPULAR_SITES_H_
#include <vector>
#include "base/callback.h"
#include "base/files/file_path.h"
#include "base/macros.h"
#include "base/memory/scoped_ptr.h"
#include "base/memory/weak_ptr.h"
#include "base/strings/string16.h"
#include "url/gurl.h"
namespace net {
class URLRequestContextGetter;
}
namespace user_prefs {
class PrefRegistrySyncable;
}
class FileDownloader;
class Profile;
// 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:
struct Site {
Site(const base::string16& title,
const GURL& url,
const GURL& favicon_url,
const GURL& large_icon_url,
const GURL& thumbnail_url);
~Site();
base::string16 title;
GURL url;
GURL favicon_url;
GURL large_icon_url;
GURL thumbnail_url;
};
using FinishedCallback = base::Callback<void(bool /* success */)>;
// Usually, the name of the file that's downloaded is based on the user's
// locale. |override_country| (if non-empty) is used to override the
// auto-detected country. |override_version|, if non-empty, will
// override the baked-in default version.
// Set |force_download| to enforce re-downloading the suggestions file, even
// if it already exists on disk.
PopularSites(Profile* profile,
const std::string& override_country,
const std::string& override_version,
bool force_download,
const FinishedCallback& callback);
// This fetches the popular sites from a given url and is only used for
// debugging through the popular-sites-internals page.
PopularSites(Profile* profile,
const GURL& url,
const FinishedCallback& callback);
~PopularSites();
const std::vector<Site>& sites() const { return sites_; }
const base::FilePath& local_path() const { return popular_sites_local_path_; }
// Register preferences used by this class.
static void RegisterProfilePrefs(
user_prefs::PrefRegistrySyncable* user_prefs);
private:
PopularSites(Profile* profile,
const GURL& url,
bool force_download,
const FinishedCallback& callback);
// Fetch the popular sites at the given URL. |force_download| should be true
// if any previously downloaded site list should be overwritten.
void FetchPopularSites(const GURL& url,
bool force_download,
bool is_fallback);
// If the download was not successful and it was not a fallback, attempt to
// download the fallback suggestions.
void OnDownloadDone(bool success, bool is_fallback);
void ParseSiteList(const base::FilePath& path);
void OnJsonParsed(scoped_ptr<std::vector<Site>> sites);
FinishedCallback callback_;
scoped_ptr<FileDownloader> downloader_;
std::vector<Site> sites_;
base::FilePath popular_sites_local_path_;
Profile* profile_;
base::WeakPtrFactory<PopularSites> weak_ptr_factory_;
DISALLOW_COPY_AND_ASSIGN(PopularSites);
};
#endif // CHROME_BROWSER_ANDROID_POPULAR_SITES_H_
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