pica/request/request.h

//SPDX-FileCopyrightText: 2023 Yury Gubich <blue@macaw.me>
//SPDX-License-Identifier: GPL-3.0-or-later

#pragma once

#include <memory>
#include <stdexcept>
#include <string_view>
#include <string>
#include <array>
#include <map>

#include <fcgiapp.h>

#include <nlohmann/json.hpp>

#include "stream/ostream.h"
#include "utils/formdecode.h"
#include "utils/helpers.h"
#include "response/response.h"

class Request {
    friend class Response;
public:
    enum class State {
        initial,
        accepted,
        responding,
        responded,
        terminated
    };

    enum class Method {
        get,
        post,
        unknown
    };

    Request();
    ~Request();
    Request(const Request& other) = delete;
    Request(Request&& other) = delete;
    Request& operator = (const Request& other) = delete;
    Request& operator = (Request&& other) = delete;

    bool wait(int socketDescriptor);
    bool active() const;

    Response& createResponse();
    Response& createResponse(Response::Status status);

    uint16_t responseCode() const;
    Method method() const;
    std::string_view methodName() const;
    State currentState() const;
    bool isFormUrlEncoded() const;
    unsigned int contentLength() const;
    std::map<std::string, std::string> getForm() const;

    void readPath(const std::string& serverName);
    std::string getPath() const;
    std::string getServerName() const;
    std::string getAuthorizationToken() const;
    void printEnvironment(std::ostream& out) const;
    void printEnvironment(nlohmann::json& out) const;

private:
    OStream getOutputStream();
    OStream getErrorStream();
    void responseIsComplete();
    void terminate();
    std::map<std::string, std::string> getFormPOST() const;

private:
    State state;
    FCGX_Request raw;
    std::unique_ptr<Response> response;
    std::string path;
    mutable Method cachedMethod;
};