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// 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_SNIPPETS_SESSIONS_FOREIGN_SESSIONS_SUGGESTIONS_PROVIDER_H_
#define COMPONENTS_NTP_SNIPPETS_SESSIONS_FOREIGN_SESSIONS_SUGGESTIONS_PROVIDER_H_
#include <memory>
#include <set>
#include <string>
#include <vector>
#include "base/callback_forward.h"
#include "base/macros.h"
#include "components/ntp_snippets/category.h"
#include "components/ntp_snippets/category_status.h"
#include "components/ntp_snippets/content_suggestions_provider.h"
#include "components/sessions/core/session_types.h"
#include "components/sync_sessions/synced_session.h"
class PrefRegistrySimple;
class PrefService;
namespace ntp_snippets {
// Simple interface to get foreign tab data on demand and on change.
class ForeignSessionsProvider {
public:
virtual ~ForeignSessionsProvider() = default;
virtual bool HasSessionsData() = 0;
virtual std::vector<const sync_sessions::SyncedSession*>
GetAllForeignSessions() = 0;
// Should only be called at most once.
virtual void SubscribeForForeignTabChange(
const base::Closure& change_callback) = 0;
};
// Provides content suggestions from foreign sessions.
class ForeignSessionsSuggestionsProvider : public ContentSuggestionsProvider {
public:
ForeignSessionsSuggestionsProvider(
ContentSuggestionsProvider::Observer* observer,
std::unique_ptr<ForeignSessionsProvider> foreign_sessions_provider,
PrefService* pref_service);
~ForeignSessionsSuggestionsProvider() override;
static void RegisterProfilePrefs(PrefRegistrySimple* registry);
private:
friend class ForeignSessionsSuggestionsProviderTest;
struct SessionData;
// ContentSuggestionsProvider implementation.
CategoryStatus GetCategoryStatus(Category category) override;
CategoryInfo GetCategoryInfo(Category category) override;
void DismissSuggestion(const ContentSuggestion::ID& suggestion_id) override;
void FetchSuggestionImage(const ContentSuggestion::ID& suggestion_id,
const ImageFetchedCallback& callback) override;
void Fetch(const Category& category,
const std::set<std::string>& known_suggestion_ids,
const FetchDoneCallback& callback) override;
void ClearHistory(
base::Time begin,
base::Time end,
const base::Callback<bool(const GURL& url)>& filter) override;
void ClearCachedSuggestions(Category category) override;
void GetDismissedSuggestionsForDebugging(
Category category,
const DismissedSuggestionsCallback& callback) override;
void ClearDismissedSuggestionsForDebugging(Category category) override;
void OnForeignTabChange();
std::vector<ContentSuggestion> BuildSuggestions();
std::vector<SessionData> GetSuggestionCandidates(
const base::Callback<bool(const std::string& id)>& suggestions_filter);
ContentSuggestion BuildSuggestion(const SessionData& data);
CategoryStatus category_status_;
const Category provided_category_;
std::unique_ptr<ForeignSessionsProvider> foreign_sessions_provider_;
PrefService* pref_service_;
DISALLOW_COPY_AND_ASSIGN(ForeignSessionsSuggestionsProvider);
};
} // namespace ntp_snippets
#endif // COMPONENTS_NTP_SNIPPETS_SESSIONS_FOREIGN_SESSIONS_SUGGESTIONS_PROVIDER_H_
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