components/feed/content/feed_host_service.h

// Copyright 2018 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_FEED_CONTENT_FEED_HOST_SERVICE_H_
#define COMPONENTS_FEED_CONTENT_FEED_HOST_SERVICE_H_

#include <memory>

#include "base/macros.h"
#include "components/feed/content/feed_offline_host.h"
#include "components/feed/core/feed_content_database.h"
#include "components/feed/core/feed_journal_database.h"
#include "components/feed/core/feed_logging_metrics.h"
#include "components/feed/core/feed_networking_host.h"
#include "components/feed/core/feed_scheduler_host.h"
#include "components/keyed_service/core/keyed_service.h"

namespace feed {

// KeyedService responsible for managing the lifetime of Feed Host API
// implementations. It instantiates and owns these API implementations, and
// provides access to non-owning pointers to them. While host implementations
// may be created on demand, it is possible they will not be fully initialized
// yet.
class FeedHostService : public KeyedService {
 public:
  FeedHostService(std::unique_ptr<FeedLoggingMetrics> logging_metrics,
                  std::unique_ptr<FeedNetworkingHost> networking_host,
                  std::unique_ptr<FeedSchedulerHost> scheduler_host,
                  std::unique_ptr<FeedContentDatabase> content_database,
                  std::unique_ptr<FeedJournalDatabase> journal_database,
                  std::unique_ptr<FeedOfflineHost> offline_host);
  ~FeedHostService() override;

  FeedLoggingMetrics* GetLoggingMetrics();
  FeedNetworkingHost* GetNetworkingHost();
  FeedSchedulerHost* GetSchedulerHost();
  FeedContentDatabase* GetContentDatabase();
  FeedJournalDatabase* GetJournalDatabase();
  FeedOfflineHost* GetOfflineHost();

 private:
  std::unique_ptr<FeedLoggingMetrics> logging_metrics_;
  std::unique_ptr<FeedNetworkingHost> networking_host_;
  std::unique_ptr<FeedSchedulerHost> scheduler_host_;
  std::unique_ptr<FeedContentDatabase> content_database_;
  std::unique_ptr<FeedJournalDatabase> journal_database_;

  // Depends on the |scheduler_host_|, so must come after in this file to be
  // destroyed before the scheduler.
  std::unique_ptr<FeedOfflineHost> offline_host_;

  DISALLOW_COPY_AND_ASSIGN(FeedHostService);
};

}  // namespace feed

#endif  // COMPONENTS_FEED_CONTENT_FEED_HOST_SERVICE_H_