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// Copyright (c) 2010 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_DOWNLOAD_DOWNLOAD_HISTORY_H_
#define CHROME_BROWSER_DOWNLOAD_DOWNLOAD_HISTORY_H_
#pragma once
#include "base/basictypes.h"
#include "chrome/browser/cancelable_request.h"
#include "chrome/browser/history/history.h"
class DownloadItem;
class Profile;
namespace base {
class Time;
}
// Interacts with the HistoryService on behalf of the download subsystem.
class DownloadHistory {
public:
// A fake download table ID which represents a download that has started,
// but is not yet in the table.
static const int kUninitializedHandle;
explicit DownloadHistory(Profile* profile);
~DownloadHistory();
// Retrieves DownloadCreateInfos saved in the history.
void Load(HistoryService::DownloadQueryCallback* callback);
// Adds a new entry for a download to the history database.
void AddEntry(const DownloadCreateInfo& info,
DownloadItem* download_item,
HistoryService::DownloadCreateCallback* callback);
// Updates the history entry for |download_item|.
void UpdateEntry(DownloadItem* download_item);
// Updates the download path for |download_item| to |new_path|.
void UpdateDownloadPath(DownloadItem* download_item,
const FilePath& new_path);
// Removes |download_item| from the history database.
void RemoveEntry(DownloadItem* download_item);
// Removes download-related history entries in the given time range.
void RemoveEntriesBetween(const base::Time remove_begin,
const base::Time remove_end);
// Returns a new unique database handle which will not collide with real ones.
int64 GetNextFakeDbHandle();
private:
Profile* profile_;
// In case we don't have a valid db_handle, we use |fake_db_handle_| instead.
// This is useful for incognito mode or when the history database is offline.
// Downloads are expected to have unique handles, so we decrement the next
// fake handle value on every use.
int64 next_fake_db_handle_;
CancelableRequestConsumer history_consumer_;
DISALLOW_COPY_AND_ASSIGN(DownloadHistory);
};
#endif // CHROME_BROWSER_DOWNLOAD_DOWNLOAD_HISTORY_H_
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