// Copyright (c) 2022 by István Váradi

// This file is part of VSCPL, a simple cross-platform utility library

// 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 THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 THE COPYRIGHT OWNER 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.

// The views and conclusions contained in the software and documentation are those
// of the authors and should not be interpreted as representing official policies,
// either expressed or implied, of the FreeBSD Project.

#pragma once

//------------------------------------------------------------------------------

#include "Completer.h"

#include "TCPSocket.h"

//------------------------------------------------------------------------------

namespace hu { namespace varadiistvan { namespace scpl { namespace io {

//------------------------------------------------------------------------------

/**
 * The connector class used by the TCP client socket.
 */
class TCPConnector : public Completer
{
private:
    /**
     * The local socket to connect on behalf of which we connect.
     */
    TCPSocket& socket;

    /**
     * The socket address to connect to.
     */
    struct sockaddr_in address;

    /**
     * Indicate if we are connected.
     */
    bool connected;

    /**
     * Indicate if we are connecting.
     */
    bool connecting;

protected:
    /**
     * Create the connector for the given TCP client socket.
     */
    TCPConnector(TCPSocket* socket,
                 struct in_addr address, unsigned short port);

public:
    /**
     * Connect to an address properly set up.
     *
     * If the connection succeeds immediately, it indicates success.
     *
     * If the connection does not succeed, because it would block, it
     * sets up the socket to wait for the connection to succeed, and
     * returns failure.
     *
     * If the connection fails for another reason, the error code is
     * set, and false is returned.
     */
    bool connect();

private:

    void handleWaitedResult(DWORD size) override;

    friend class FailableReference<TCPConnector>;
    friend class TCPClientSocket;
};

//------------------------------------------------------------------------------

inline TCPConnector::TCPConnector(TCPSocket* socket,
                                  struct in_addr address, unsigned short port) :
    Completer(socket),
    socket(*socket),
    connected(false),
    connecting(false)
{
    this->address.sin_family = AF_INET;
    this->address.sin_addr = address;
    this->address.sin_port = htons(port);
}

//------------------------------------------------------------------------------

} /* namespace hu::varadiistvan::scpl::io */ } /* namespace hu::varadiistvan::scpl */ } /* namespace hu::varadiistvan */ } /* namespace hu */

//------------------------------------------------------------------------------

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// mode: C++
// c-basic-offset: 4
// indent-tabs-mode: nil
// End: