/*
 * Copyright (C) 2006 Apple Computer, Inc.  All rights reserved.
 * Copyright (C) 2009 Google Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef HTTPHeaderMap_h
#define HTTPHeaderMap_h

#include "platform/PlatformExport.h"
#include "wtf/Allocator.h"
#include "wtf/HashMap.h"
#include "wtf/Vector.h"
#include "wtf/text/AtomicString.h"
#include "wtf/text/AtomicStringHash.h"
#include "wtf/text/StringHash.h"
#include <memory>
#include <utility>

namespace blink {

typedef Vector<std::pair<String, String>> CrossThreadHTTPHeaderMapData;

// FIXME: Not every header fits into a map. Notably, multiple Set-Cookie header
// fields are needed to set multiple cookies.
class PLATFORM_EXPORT HTTPHeaderMap final {
  DISALLOW_NEW();

 public:
  HTTPHeaderMap();
  ~HTTPHeaderMap();

  // Gets a copy of the data suitable for passing to another thread.
  std::unique_ptr<CrossThreadHTTPHeaderMapData> copyData() const;

  void adopt(std::unique_ptr<CrossThreadHTTPHeaderMapData>);

  typedef HashMap<AtomicString, AtomicString, CaseFoldingHash> MapType;
  typedef MapType::AddResult AddResult;
  typedef MapType::const_iterator const_iterator;

  size_t size() const { return m_headers.size(); }
  const_iterator begin() const { return m_headers.begin(); }
  const_iterator end() const { return m_headers.end(); }
  const_iterator find(const AtomicString& k) const { return m_headers.find(k); }
  void clear() { m_headers.clear(); }
  bool contains(const AtomicString& k) const { return m_headers.contains(k); }
  const AtomicString& get(const AtomicString& k) const {
    return m_headers.get(k);
  }
  AddResult set(const AtomicString& k, const AtomicString& v) {
    return m_headers.set(k, v);
  }
  AddResult add(const AtomicString& k, const AtomicString& v) {
    return m_headers.add(k, v);
  }
  void remove(const AtomicString& k) { m_headers.remove(k); }
  bool operator!=(const HTTPHeaderMap& rhs) const {
    return m_headers != rhs.m_headers;
  }
  bool operator==(const HTTPHeaderMap& rhs) const {
    return m_headers == rhs.m_headers;
  }

 private:
  HashMap<AtomicString, AtomicString, CaseFoldingHash> m_headers;
};

}  // namespace blink

#endif  // HTTPHeaderMap_h