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// Copyright 2016 The Chromium Authors
// 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 <map>
#include <memory>
#include <string>
#include "base/functional/callback.h"
#include "base/memory/raw_ptr.h"
#include "base/memory/weak_ptr.h"
#include "components/ntp_tiles/popular_sites.h"
#include "services/data_decoder/public/cpp/data_decoder.h"
#include "url/gurl.h"
namespace network {
class SimpleURLLoader;
class SharedURLLoaderFactory;
} // namespace network
namespace user_prefs {
class PrefRegistrySyncable;
}
namespace variations {
class VariationsService;
}
class PrefService;
class TemplateURLService;
namespace ntp_tiles {
// 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:
PopularSitesImpl(
PrefService* prefs,
const TemplateURLService* template_url_service,
variations::VariationsService* variations_service,
scoped_refptr<network::SharedURLLoaderFactory> url_loader_factory);
PopularSitesImpl(const PopularSitesImpl&) = delete;
PopularSitesImpl& operator=(const PopularSitesImpl&) = delete;
~PopularSitesImpl() override;
// PopularSites implementation.
bool MaybeStartFetch(bool force_download, FinishedCallback callback) override;
const std::map<SectionType, SitesVector>& sections() const override;
GURL GetURLToFetch() override;
std::string GetDirectoryToFetch() override;
std::string GetCountryToFetch() override;
std::string GetVersionToFetch() override;
const base::Value::List& 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();
// Called once SimpleURLLoader completes the network request.
void OnSimpleLoaderComplete(std::unique_ptr<std::string> response_body);
void OnJsonParsed(data_decoder::DataDecoder::ValueOrError result);
void OnDownloadFailed();
// Parameters set from constructor.
const raw_ptr<PrefService> prefs_;
const raw_ptr<const TemplateURLService> template_url_service_;
const raw_ptr<variations::VariationsService> variations_;
scoped_refptr<network::SharedURLLoaderFactory> url_loader_factory_;
// Set by MaybeStartFetch() and called after fetch completes.
FinishedCallback callback_;
std::unique_ptr<network::SimpleURLLoader> simple_url_loader_;
bool is_fallback_;
std::map<SectionType, SitesVector> sections_;
GURL pending_url_;
int version_in_pending_url_;
base::WeakPtrFactory<PopularSitesImpl> weak_ptr_factory_{this};
};
} // namespace ntp_tiles
#endif // COMPONENTS_NTP_TILES_POPULAR_SITES_IMPL_H_
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