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 * Copyright (C) 2007-2021 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
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
 */

#pragma once

#include <wtf/Platform.h>
#include <wtf/text/WTFString.h>

namespace WebCore {

class ProtectionSpace;

enum class ProtectionSpaceBaseServerType : uint8_t {
    HTTP = 1, // NOLINT
    HTTPS, // NOLINT
    FTP, // NOLINT
    FTPS, // NOLINT
    ProxyHTTP,
    ProxyHTTPS,
    ProxyFTP,
    ProxySOCKS
};

enum class ProtectionSpaceBaseAuthenticationScheme : uint8_t {
    Default = 1,
    HTTPBasic,
    HTTPDigest,
    HTMLForm,
    NTLM, // NOLINT
    Negotiate,
    ClientCertificateRequested,
    ServerTrustEvaluationRequested,
#if PLATFORM(COCOA)
    XMobileMeAuthToken,
#endif
    OAuth,
#if PLATFORM(COCOA)
    PrivateAccessToken,
    OAuthBearerToken,
#endif
#if USE(GLIB)
    ClientCertificatePINRequested,
#endif
#if !PLATFORM(COCOA)
    Unknown = 100
#endif
};
  
class ProtectionSpaceBase {
public:
    using ServerType = ProtectionSpaceBaseServerType;
    using AuthenticationScheme = ProtectionSpaceBaseAuthenticationScheme;

    bool isHashTableDeletedValue() const { return m_isHashTableDeletedValue; }
    
    const String& host() const LIFETIME_BOUND { return m_host; }
    int port() const { return m_port; }
    ServerType serverType() const { return m_serverType; }
    WEBCORE_EXPORT bool NODELETE isProxy() const;
    const String& realm() const LIFETIME_BOUND { return m_realm; }
    AuthenticationScheme authenticationScheme() const { return m_authenticationScheme; }
    
    WEBCORE_EXPORT bool NODELETE receivesCredentialSecurely() const;
    WEBCORE_EXPORT bool NODELETE isPasswordBased() const;

    bool encodingRequiresPlatformData() const { return false; }

    WEBCORE_EXPORT static bool compare(const ProtectionSpace&, const ProtectionSpace&);

protected:
    ProtectionSpaceBase() = default;
    WEBCORE_EXPORT ProtectionSpaceBase(const String& host, int port, ServerType, const String& realm, AuthenticationScheme);

    // Hash table deleted values, which are only constructed and never copied or destroyed.
    ProtectionSpaceBase(WTF::HashTableDeletedValueType) : m_isHashTableDeletedValue(true) { }

    static bool platformCompare(const ProtectionSpace&, const ProtectionSpace&) { return true; }

private:
    // Need to enforce empty, non-null strings due to the pickiness of the String == String operator
    // combined with the semantics of the String(NSString*) constructor
    String m_host { emptyString() };
    String m_realm { emptyString() };

    int m_port { 0 };
    ServerType m_serverType { ServerType::HTTP };
    AuthenticationScheme m_authenticationScheme { AuthenticationScheme::Default };
    bool m_isHashTableDeletedValue { false };
};

inline bool operator==(const ProtectionSpace& a, const ProtectionSpace& b) { return ProtectionSpaceBase::compare(a, b); }
    
} // namespace WebCore

