ClientServerProject/main.cpp

#if WIN32
#define NOMINMAX
#endif
#include "modernize/sockets.h"
#include "libraries/user_input.h"
#include "libraries/osyncstream.h"
#include "libraries/terminal.h"
#include "libraries/json.hpp"
#include <chrono>
#include "project/server.h"
#include "project/client.h"
#include <iostream>
#include <fstream>

using json = nlohmann::json;

auto onClientConnected(networked& client)
{
    sscout << "Accepted Client on Server.\n";

    using namespace std::chrono_literals;
    auto start = std::chrono::high_resolution_clock::now();
    //std::this_thread::sleep_for(2000ms);

    return true;
}
auto onClientMessaged(networked& client, std::string& message)
{
    try
    {
        int operation = std::stoi(message);
        sscout << "OPCode is " << operation << ".\n";
        switch(operation)
        {
            case 1:
                client.send_message(net::system("date"));
                break;
            case 4:
                client.send_message(net::system("netstat -ant"));
                break;
            default:
                break;
        }
    }catch(std::invalid_argument& invalid_number)
    {
        sscout << "Invalid OPCode, Ignored.\n";
    }
    client.disconnect();
    return true;
}

auto get_ip_port(int mode)
{
    std::string ipaddress{};
    std::uint16_t port{};
    if (mode == 1)
        ipaddress = "0.0.0.0";
    else
        ipaddress = get_input<std::string>("Enter IP: ");
    port = get_input<std::uint16_t>("Enter Port:");
    return std::make_tuple(mode == 1 ? "Server" : mode == 2 ? "Client" : "Unknown", ipaddress, port);
}

auto execute_as_client(std::string ipaddress, std::uint16_t port)
{
    auto num_clients = get_input<int>("Enter number of clients. (1-25): ", "Invalid Amount", math::is_between<0, 26>);
    auto operation = get_input<int>("Pick Command\n\t1. Date\n\t2. \n\t3. \n\t4. Netstat\n:>", "Invalid Selection", math::is_between<0, 5>);
    std::vector<std::thread> threads{};
    threads.reserve(num_clients);

    auto internal_tracker = 0; //Stats tracking.
    std::vector<double> internal_stats{};
    internal_stats.reserve(num_clients);
    for(int i = 0; i < num_clients; ++i)
    {
        threads.emplace_back(std::thread([&]()
        {
            client net_client{};
            auto start = std::chrono::high_resolution_clock::now();
            net_client.message_received += [start, &internal_tracker, &internal_stats](std::string& message)
            {
                auto end = std::chrono::high_resolution_clock::now();
                std::chrono::duration<double, std::milli> elapsed = end-start;
                sscout << internal_tracker << math::numerical_suffix(internal_tracker++) << " client response\n"
                       << message
                       << "Round Trip Was  " << elapsed.count() << " ms\n"
                       << hr;
                internal_stats.emplace_back(elapsed.count()); //Stats tracking
                return true;
            };
            auto res = net_client.connect(ipaddress, port);
            if (res.joinable())
            {
                net_client.send_message(std::to_string(operation));
                res.join();
            }
        }));
    }
    sscout << "All clients connected.\n" << hr;
    for(auto&& thread : threads)
        thread.join();
    sscout << "Finished!\n";
    json metrics_json = internal_stats;

    std::ofstream metrics;
    metrics.open ("metrics.json", std::ios::out | std::ios::trunc); //again, metrics data
    metrics << metrics_json;
    metrics.close();
}


int main() {
    net::prologue();
    const auto mode = get_input<int>("Select Mode\n\t1. Server\n\t2. Client\n>:", "Invalid Choice!",
                                     math::is_between<0, 3>);
    while (true) {
        auto[prefix, ipaddress, port] = get_ip_port(mode);
        sscout << prefix << " selected, ip/port is " << ipaddress << "/" << port << ".\n";
        if (mode == 2) {
            execute_as_client(ipaddress, port);
        } else {
            server net_server{};

            net_server.client_connected += onClientConnected;
            net_server.message_received += onClientMessaged;
            net_server.listen(ipaddress, port).join();
        }
    }
}