Source/WebCore/Modules/indexeddb/shared/IDBError.h

/*
 * Copyright (C) 2015, 2016 Apple 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 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 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.
 */

#pragma once

#if ENABLE(INDEXED_DATABASE)

#include "DOMException.h"
#include "ExceptionCode.h"
#include <wtf/text/WTFString.h>

namespace WebCore {

class IDBError {
public:
    WEBCORE_EXPORT explicit IDBError(Optional<ExceptionCode> = WTF::nullopt, const String& message = { });

    static IDBError userDeleteError()
    {
        return IDBError { UnknownError, "Database deleted by request of the user"_s };
    }
    
    static IDBError serverConnectionLostError()
    {
        return IDBError { UnknownError, "Connection to Indexed Database server lost. Refresh the page to try again"_s };
    }

    RefPtr<DOMException> toDOMException() const;

    Optional<ExceptionCode> code() const { return m_code; }
    String name() const;
    String message() const;

    bool isNull() const { return !m_code; }

    IDBError isolatedCopy() const;

    template<class Encoder> void encode(Encoder&) const;
    template<class Decoder> static bool decode(Decoder&, IDBError&);

private:
    Optional<ExceptionCode> m_code;
    String m_message;
};

template<class Encoder>
void IDBError::encode(Encoder& encoder) const
{
    if (m_code) {
        encoder << true;
        encoder.encodeEnum(m_code.value());
    } else
        encoder << false;
    encoder << m_message;
}
    
template<class Decoder>
bool IDBError::decode(Decoder& decoder, IDBError& error)
{
    bool hasCode = false;
    if (!decoder.decode(hasCode))
        return false;

    if (hasCode) {
        ExceptionCode ec;
        if (!decoder.decodeEnum(ec))
            return false;
        error.m_code = ec;
    } else
        error.m_code = WTF::nullopt;

    if (!decoder.decode(error.m_message))
        return false;

    return true;
}

} // namespace WebCore

#endif // ENABLE(INDEXED_DATABASE)