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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_WEBUI_NTP_TILES_INTERNALS_MESSAGE_HANDLER_H_
#define COMPONENTS_NTP_TILES_WEBUI_NTP_TILES_INTERNALS_MESSAGE_HANDLER_H_
#include <map>
#include <memory>
#include <string>
#include "base/memory/raw_ptr.h"
#include "base/memory/weak_ptr.h"
#include "base/task/cancelable_task_tracker.h"
#include "base/values.h"
#include "components/favicon_base/favicon_types.h"
#include "components/ntp_tiles/most_visited_sites.h"
namespace favicon {
class FaviconService;
} // namespace favicon
namespace ntp_tiles {
class MostVisitedSites;
class NTPTilesInternalsMessageHandlerClient;
// Implements the WebUI message handler for chrome://ntp-tiles-internals/
//
// Because content and iOS use different implementations of WebUI, this class
// implements the generic portion and depends on the embedder to inject a bridge
// to the embedder's API. It cannot itself implement either API directly.
class NTPTilesInternalsMessageHandler : public MostVisitedSites::Observer {
public:
// |favicon_service| must not be null and must outlive this object.
explicit NTPTilesInternalsMessageHandler(
favicon::FaviconService* favicon_service);
NTPTilesInternalsMessageHandler(const NTPTilesInternalsMessageHandler&) =
delete;
NTPTilesInternalsMessageHandler& operator=(
const NTPTilesInternalsMessageHandler&) = delete;
~NTPTilesInternalsMessageHandler() override;
// Called when the WebUI page's JavaScript has loaded and it is ready to
// receive RegisterMessageCallback() calls. |client| must outlive this object.
void RegisterMessages(NTPTilesInternalsMessageHandlerClient* client);
private:
using FaviconResultMap = std::map<std::pair<GURL, favicon_base::IconType>,
favicon_base::FaviconRawBitmapResult>;
// Callbacks registered in RegisterMessages().
void HandleRegisterForEvents(const base::Value::List& args);
void HandleUpdate(const base::Value::List& args);
void HandleViewPopularSitesJson(const base::Value::List& args);
void SendSourceInfo();
void SendTiles(const NTPTilesVector& tiles,
const FaviconResultMap& result_map);
// MostVisitedSites::Observer.
void OnURLsAvailable(
bool is_user_triggered,
const std::map<SectionType, NTPTilesVector>& sections) override;
void OnIconMadeAvailable(const GURL& site_url) override;
void OnFaviconLookupDone(const NTPTilesVector& tiles,
FaviconResultMap* result_map,
size_t* num_pending_lookups,
const GURL& page_url,
const favicon_base::FaviconRawBitmapResult& result);
raw_ptr<favicon::FaviconService> favicon_service_;
// Bridge to embedder's API.
raw_ptr<NTPTilesInternalsMessageHandlerClient> client_;
int site_count_;
std::unique_ptr<MostVisitedSites> most_visited_sites_;
std::string popular_sites_json_;
base::CancelableTaskTracker cancelable_task_tracker_;
base::WeakPtrFactory<NTPTilesInternalsMessageHandler> weak_ptr_factory_{this};
};
} // namespace ntp_tiles
#endif // COMPONENTS_NTP_TILES_WEBUI_NTP_TILES_INTERNALS_MESSAGE_HANDLER_H_
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