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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 WEBKIT_BLOB_BLOB_STORAGE_CONTROLLER_H_
#define WEBKIT_BLOB_BLOB_STORAGE_CONTROLLER_H_

#include "base/hash_tables.h"
#include "base/process.h"
#include "base/ref_counted.h"

class GURL;

namespace webkit_blob {

class BlobData;

// This class handles the logistics of blob Storage within the browser process.
class BlobStorageController {
 public:
  BlobStorageController();
  ~BlobStorageController();

  void RegisterBlobUrl(const GURL& url, const BlobData* blob_data);
  void RegisterBlobUrlFrom(const GURL& url, const GURL& src_url);
  void UnregisterBlobUrl(const GURL& url);
  BlobData* GetBlobDataFromUrl(const GURL& url);

 private:
  void AppendStorageItems(BlobData* target_blob_data,
                          BlobData* src_blob_data,
                          uint64 offset,
                          uint64 length);

  typedef base::hash_map<std::string, scoped_refptr<BlobData> > BlobMap;
  BlobMap blob_map_;

  DISALLOW_COPY_AND_ASSIGN(BlobStorageController);
};

}  // namespace webkit_blob

#endif  // WEBKIT_BLOB_BLOB_STORAGE_CONTROLLER_H_