FeatherMC/src/ServerStatus.h

#pragma once

#include "rapidjson/document.h"
#include "rapidjson/writer.h"
#include "rapidjson/stringbuffer.h"

#include <string>

namespace Feather
{
    class ServerStatus
    {
        using string = std::string;
        string cachedJSON;

    public:
        // Version
        string versionName = "1.15.2";//"1.16.1";
        int protocol = 578;//736;

        // Players
        int maxPlayers;
        int numPlayers;

        // Description
        string descriptionText = "";

        const string &GetServerStatusJSON(bool forceUpdate = false)
        {
            using namespace rapidjson;

            if (cachedJSON.length() > 0 && !forceUpdate) return cachedJSON;

            Document doc;
            doc.SetObject();

            auto &alloc = doc.GetAllocator();

            Value version(kObjectType);
            {
                Value name;
                name.SetString(versionName.c_str(), versionName.length());
                version.AddMember("name", name, alloc);
                version.AddMember("protocol", protocol, alloc);
            }
            doc.AddMember("version", version, alloc);

            Value players(kObjectType);
            {
                players.AddMember("max", maxPlayers, alloc);
                players.AddMember("online", numPlayers, alloc);
                Value sample(kArrayType);
                players.AddMember("sample", sample, alloc);
            }
            doc.AddMember("players", players, alloc);

            // TODO: use chat object
            Value description(kObjectType);
            {
                Value text;
                text.SetString(descriptionText.c_str(), descriptionText.length());
                description.AddMember("text", text, alloc);
            }
            doc.AddMember("description", description, alloc);

            StringBuffer buf;
            Writer<StringBuffer> writer(buf);
            doc.Accept(writer);

            cachedJSON.assign(buf.GetString(), buf.GetLength());

            return cachedJSON;
        }
    };
}