text: // Copyright 2017 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_DOWNLOAD_PUBLIC_BACKGROUND_SERVICE_DOWNLOAD_METADATA_H_
  #define COMPONENTS_DOWNLOAD_PUBLIC_BACKGROUND_SERVICE_DOWNLOAD_METADATA_H_
  
  #include <vector>
  
  #include "base/files/file_path.h"
  #include "base/memory/scoped_refptr.h"
  #include "base/optional.h"
  #include "net/http/http_response_headers.h"
  #include "storage/browser/blob/blob_data_handle.h"
  #include "url/gurl.h"
  
  namespace download {
  
  // Struct that contains information about successfully completed downloads.
  struct CompletionInfo {
    // The file path for the download file. In incognito mode, use |blob_handle_|
    // to retrieve data.
    base::FilePath path;
  
    // The blob data handle that contains download data.
    // Will be available after the download is completed in incognito mode.
    base::Optional<storage::BlobDataHandle> blob_handle;
  
    // Download file size in bytes.
    uint64_t bytes_downloaded = 0u;
  
    // The url chain of the download. Download may encounter redirects, and
    // fetches the content from the last url in the chain.
    // This will reflect the initial request's chain and does not take into
    // account changed values during retries/resumptions.
    std::vector<GURL> url_chain;
  
    // The response headers for the download request.
    // This will reflect the initial response's headers and does not take into
    // account changed values during retries/resumptions.
    scoped_refptr<const net::HttpResponseHeaders> response_headers;
  
    // An optional base::HexEncoded SHA-256 hash (if available) of the file
    // contents.  If empty there is no available hash value.
    std::string hash256;
  
    CompletionInfo();
    CompletionInfo(
        const base::FilePath& path,
        uint64_t bytes_downloaded,
        const std::vector<GURL>& url_chain,
        scoped_refptr<const net::HttpResponseHeaders> response_headers);
    CompletionInfo(const base::FilePath& path, uint64_t bytes_downloaded);
    CompletionInfo(const CompletionInfo& other);
    ~CompletionInfo();
    bool operator==(const CompletionInfo& other) const;
  };
  
  // Struct to describe general download status.
  struct DownloadMetaData {
    // The GUID of the download.
    std::string guid;
  
    // Data that has been fetched. Can be used to get the current size of
    // uncompleted download.
    uint64_t current_size;
  
    // Whether the entry is currently paused by the client.
    bool paused;
  
    // Info about successfully completed download, or null for in-progress
    // download. Failed download will not be persisted and exposed as meta data.
    base::Optional<CompletionInfo> completion_info;
  
    DownloadMetaData();
    ~DownloadMetaData();
    DownloadMetaData(const DownloadMetaData& other);
    bool operator==(const DownloadMetaData& other) const;
  };
  
  }  // namespace download
  
  #endif  // COMPONENTS_DOWNLOAD_PUBLIC_BACKGROUND_SERVICE_DOWNLOAD_METADATA_H_
  