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// Copyright (c) 2011 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 CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_FILE_H_
#define CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_FILE_H_
#pragma once
#include <string>
#include "base/basictypes.h"
#include "base/memory/ref_counted.h"
#include "content/browser/download/base_file.h"
#include "content/browser/download/download_id.h"
#include "content/browser/download/download_request_handle.h"
#include "content/browser/download/download_types.h"
#include "content/common/content_export.h"
struct DownloadCreateInfo;
class DownloadManager;
// These objects live exclusively on the download thread and handle the writing
// operations for one download. These objects live only for the duration that
// the download is 'in progress': once the download has been completed or
// cancelled, the DownloadFile is destroyed.
class CONTENT_EXPORT DownloadFile : public BaseFile {
public:
// Takes ownership of the object pointed to by |request_handle|.
DownloadFile(const DownloadCreateInfo* info,
DownloadRequestHandleInterface* request_handle,
DownloadManager* download_manager);
virtual ~DownloadFile();
// Cancels the download request associated with this file.
void CancelDownloadRequest();
int id() const { return id_.local(); }
DownloadManager* GetDownloadManager();
const DownloadId& global_id() const { return id_; }
virtual std::string DebugString() const;
// Appends the passed the number between parenthesis the path before the
// extension.
static void AppendNumberToPath(FilePath* path, int number);
// Attempts to find a number that can be appended to that path to make it
// unique. If |path| does not exist, 0 is returned. If it fails to find such
// a number, -1 is returned.
static int GetUniquePathNumber(const FilePath& path);
static FilePath AppendSuffixToPath(const FilePath& path,
const FilePath::StringType& suffix);
// Same as GetUniquePathNumber, except that it also checks the existence
// of it with the given suffix.
// If |path| does not exist, 0 is returned. If it fails to find such
// a number, -1 is returned.
static int GetUniquePathNumberWithSuffix(
const FilePath& path,
const FilePath::StringType& suffix);
private:
// The unique identifier for this download, assigned at creation by
// the DownloadFileManager for its internal record keeping.
DownloadId id_;
// The handle to the request information. Used for operations outside the
// download system, specifically canceling a download.
scoped_ptr<DownloadRequestHandleInterface> request_handle_;
// DownloadManager this download belongs to.
scoped_refptr<DownloadManager> download_manager_;
DISALLOW_COPY_AND_ASSIGN(DownloadFile);
};
#endif // CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_FILE_H_
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