response.hpp

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// This file is part of playd.
// playd is licensed under the MIT licence: see LICENSE.txt.

#ifndef PLAYD_IO_RESPONSE_HPP
#define PLAYD_IO_RESPONSE_HPP

#include <cstdint>
#include <map>
#include <memory>
#include <ostream>
#include <string>
#include <vector>

#include "errors.hpp"

class Response
{
public:
    static const std::string NOREQUEST;

    enum class Code : std::uint8_t {
        OHAI,  
        IAMA,  
        FLOAD, 
        EJECT, 
        POS,   
        END,   
        PLAY,  
        STOP,  
        ACK    
    };

    static constexpr std::uint8_t CODE_COUNT = 9;

    Response(const std::string &tag, Response::Code code);

    Response &AddArg(const std::string &arg);

    std::string Pack() const;

    static Response Success(const std::string &tag);

    static Response Invalid(const std::string &tag, const std::string &msg);

    static Response Failure(const std::string &tag, const std::string &msg);

private:

    static const std::array<std::string, CODE_COUNT> STRINGS;

    static std::string EscapeArg(const std::string &arg);

    std::string string;
};

class ResponseSink
{
public:
    virtual ~ResponseSink() = default;

    virtual void Respond(size_t id, const Response &response) const;
};

#endif // PLAYD_IO_RESPONSE_HPP