// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
#ifndef CONTENT_BROWSER_DOWNLOAD_SAVE_ITEM_H_
#define CONTENT_BROWSER_DOWNLOAD_SAVE_ITEM_H_

#include <stdint.h>

#include "base/files/file_path.h"
#include "base/memory/raw_ptr.h"
#include "content/browser/download/save_types.h"
#include "content/public/browser/frame_tree_node_id.h"
#include "content/public/common/referrer.h"
#include "net/base/isolation_info.h"
#include "services/network/public/cpp/request_mode.h"
#include "url/gurl.h"

namespace content {
class SavePackage;

// One SaveItem per save file. This is the model class that stores all the
// state for one save file.
class SaveItem {
 public:
  enum SaveState {
    WAIT_START,
    IN_PROGRESS,
    COMPLETE,
    CANCELED
  };

  SaveItem(const GURL& url,
           const Referrer& referrer,
           const net::IsolationInfo& isolation_info,
           network::mojom::RequestMode request_mode,
           bool is_outermost_main_frame,
           SavePackage* package,
           SaveFileCreateInfo::SaveFileSource save_source,
           FrameTreeNodeId frame_tree_node_id,
           FrameTreeNodeId container_frame_tree_node_id);

  SaveItem(const SaveItem&) = delete;
  SaveItem& operator=(const SaveItem&) = delete;

  ~SaveItem();

  void Start();

  // Received a new chunk of data.
  void Update(int64_t bytes_so_far);

  // Cancel saving item.
  void Cancel();

  // Saving operation completed.
  void Finish(int64_t size, bool is_success);

  // Update path for SaveItem, the actual file is renamed on the file thread.
  void SetTargetPath(const base::FilePath& full_path);

  // Accessors.
  SaveItemId id() const { return save_item_id_; }
  SaveState state() const { return state_; }
  const base::FilePath& full_path() const { return full_path_; }
  const GURL& url() const { return url_; }
  const Referrer& referrer() const { return referrer_; }
  const net::IsolationInfo& isolation_info() const { return isolation_info_; }
  network::mojom::RequestMode request_mode() const { return request_mode_; }
  bool is_outermost_main_frame() const { return is_outermost_main_frame_; }
  FrameTreeNodeId frame_tree_node_id() const { return frame_tree_node_id_; }
  FrameTreeNodeId container_frame_tree_node_id() const {
    return container_frame_tree_node_id_;
  }
  int64_t received_bytes() const { return received_bytes_; }
  bool has_final_name() const { return !full_path_.empty(); }
  bool success() const { return is_success_; }
  SaveFileCreateInfo::SaveFileSource save_source() const {
    return save_source_;
  }

 private:
  // Internal helper for maintaining consistent received and total sizes.
  void UpdateSize(int64_t size);

  // Unique identifier for this SaveItem instance.
  const SaveItemId save_item_id_;

  // Full path to the save item file.
  base::FilePath full_path_;

  // The URL for this save item.
  GURL url_;
  Referrer referrer_;

  // Request config details for isolation.
  net::IsolationInfo isolation_info_;
  network::mojom::RequestMode request_mode_;
  bool is_outermost_main_frame_;

  // Frame tree node id, if this save item represents a frame (otherwise
  // invalid).
  FrameTreeNodeId frame_tree_node_id_;

  // Frame tree node id of the frame containing this save item. (invalid if this
  // save item represents the main frame, which obviously doesn't have a
  // containing/parent frame).
  FrameTreeNodeId container_frame_tree_node_id_;

  // Current received bytes.
  int64_t received_bytes_;

  // The current state of this save item.
  SaveState state_;

  // Flag indicates whether SaveItem has error while in saving process.
  bool is_success_;

  SaveFileCreateInfo::SaveFileSource save_source_;

  // Our owning object.
  raw_ptr<SavePackage> package_;
};

}  // namespace content

#endif  // CONTENT_BROWSER_DOWNLOAD_SAVE_ITEM_H_