// 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 CHROME_BROWSER_BROWSING_DATA_SITE_DATA_SIZE_COLLECTOR_H_
#define CHROME_BROWSER_BROWSING_DATA_SITE_DATA_SIZE_COLLECTOR_H_

#include "base/memory/weak_ptr.h"
#include "chrome/browser/browsing_data/browsing_data_appcache_helper.h"
#include "chrome/browser/browsing_data/browsing_data_cache_storage_helper.h"
#include "chrome/browser/browsing_data/browsing_data_channel_id_helper.h"
#include "chrome/browser/browsing_data/browsing_data_cookie_helper.h"
#include "chrome/browser/browsing_data/browsing_data_database_helper.h"
#include "chrome/browser/browsing_data/browsing_data_file_system_helper.h"
#include "chrome/browser/browsing_data/browsing_data_flash_lso_helper.h"
#include "chrome/browser/browsing_data/browsing_data_indexed_db_helper.h"
#include "chrome/browser/browsing_data/browsing_data_local_storage_helper.h"
#include "chrome/browser/browsing_data/browsing_data_service_worker_helper.h"
#include "chrome/browser/profiles/profile.h"
#include "content/public/browser/storage_partition.h"

namespace {

typedef std::list<net::CanonicalCookie> CookieList;
typedef std::list<BrowsingDataDatabaseHelper::DatabaseInfo> DatabaseInfoList;
typedef std::list<BrowsingDataLocalStorageHelper::LocalStorageInfo>
    LocalStorageInfoList;
typedef std::list<content::StorageUsageInfo> IndexedDBInfoList;
typedef std::list<BrowsingDataFileSystemHelper::FileSystemInfo>
    FileSystemInfoList;
typedef net::ChannelIDStore::ChannelIDList ChannelIDList;
typedef std::list<content::StorageUsageInfo> ServiceWorkerUsageInfoList;
typedef std::list<content::StorageUsageInfo> CacheStorageUsageInfoList;
typedef std::vector<std::string> FlashLSODomainList;

}  // namespace

class SiteDataSizeCollector {
 public:
  SiteDataSizeCollector(const base::FilePath& default_storage_partition_path,
                        BrowsingDataCookieHelper* cookie_helper,
                        BrowsingDataDatabaseHelper* database_helper,
                        BrowsingDataLocalStorageHelper* local_storage_helper,
                        BrowsingDataAppCacheHelper* appcache_helper,
                        BrowsingDataIndexedDBHelper* indexed_db_helper,
                        BrowsingDataFileSystemHelper* file_system_helper,
                        BrowsingDataChannelIDHelper* channel_id_helper,
                        BrowsingDataServiceWorkerHelper* service_worker_helper,
                        BrowsingDataCacheStorageHelper* cache_storage_helper,
                        BrowsingDataFlashLSOHelper* flash_lso_helper);
  virtual ~SiteDataSizeCollector();

  using FetchCallback = base::Callback<void(int64_t)>;

  // Requests to fetch the total storage space used by site data.
  void Fetch(const FetchCallback& callback);

 private:
  // Callback methods to be invoked when fetching the data is complete.
  void OnAppCacheModelInfoLoaded(
      scoped_refptr<content::AppCacheInfoCollection>);
  void OnCookiesModelInfoLoaded(const net::CookieList& cookie_list);
  void OnDatabaseModelInfoLoaded(const DatabaseInfoList& database_info_list);
  void OnLocalStorageModelInfoLoaded(
      const LocalStorageInfoList& local_storage_info_list);
  void OnIndexedDBModelInfoLoaded(
      const IndexedDBInfoList& indexed_db_info_list);
  void OnFileSystemModelInfoLoaded(
      const FileSystemInfoList& file_system_info_list);
  void OnChannelIDModelInfoLoaded(const ChannelIDList& channel_id_list);
  void OnServiceWorkerModelInfoLoaded(
      const ServiceWorkerUsageInfoList& service_worker_info_list);
  void OnCacheStorageModelInfoLoaded(
      const CacheStorageUsageInfoList& cache_storage_info_list);
  void OnFlashLSOInfoLoaded(const FlashLSODomainList& domains);

  // Callback for when the size is fetched from each storage backend.
  void OnStorageSizeFetched(int64_t size);

  // Path of the default storage partition of this profile.
  base::FilePath default_storage_partition_path_;

  // Pointers to the helper objects, needed to retreive all the types of locally
  // stored data.
  scoped_refptr<BrowsingDataAppCacheHelper> appcache_helper_;
  scoped_refptr<BrowsingDataCookieHelper> cookie_helper_;
  scoped_refptr<BrowsingDataDatabaseHelper> database_helper_;
  scoped_refptr<BrowsingDataLocalStorageHelper> local_storage_helper_;
  scoped_refptr<BrowsingDataIndexedDBHelper> indexed_db_helper_;
  scoped_refptr<BrowsingDataFileSystemHelper> file_system_helper_;
  scoped_refptr<BrowsingDataChannelIDHelper> channel_id_helper_;
  scoped_refptr<BrowsingDataServiceWorkerHelper> service_worker_helper_;
  scoped_refptr<BrowsingDataCacheStorageHelper> cache_storage_helper_;
  scoped_refptr<BrowsingDataFlashLSOHelper> flash_lso_helper_;

  // Callback called when sizes of all site data are fetched and accumulated.
  FetchCallback fetch_callback_;

  // Keeps track of how many fetch operations are ongoing.
  int in_flight_operations_;

  // Keeps track of the sum of all fetched size.
  int64_t total_bytes_;

  base::WeakPtrFactory<SiteDataSizeCollector> weak_ptr_factory_;

  DISALLOW_COPY_AND_ASSIGN(SiteDataSizeCollector);
};

#endif  // CHROME_BROWSER_BROWSING_DATA_SITE_DATA_SIZE_COLLECTOR_H_