netpong/check_input.cpp

#include <iostream>
#include "includes/easysock.h"
#include "includes/connect_code.hpp"
#include "includes/server.hpp"
#include "includes/client.hpp"
#include "includes/check_input.hpp"
#include "includes/raygui/raygui.h"
#include "includes/exception_consts.hpp"
#include "includes/raygui_helpers.hpp"
#include "includes/timer.h"

GameType check_server(char* ip_text, char* port_text) {
	GameType type;
	std::string addr;
	uint16_t port;

	/* Check if IP address and port are in valid forms */
	if (check_ip_ver(ip_text) < 0) {
		throw std::invalid_argument("Invalid IP address");
	}
	if (port_to_num(port_text) < 0) {
		throw std::invalid_argument("Invalid port");
	}

	/* From here on, we assume that the IP and port are valid */

	addr = std::string(ip_text);
	port = std::stoi(std::string(port_text));

	std::string code = connect_code::encode(addr, std::to_string(port));

	/* Create server socket and wait for client to connect */
	Server* server = new Server(ES_UDP, addr.data(), port);
	server->create_socket();
	display_text_centered("Your code is " + code + "\nWaiting for connection...");
	std::string response = "";
	char* temp_response = NULL;
	/* Wait for the client to connect. Since recvAll returns a char*, we need to create a temporary variable to check for NULL. 
	TODO - Check that the client actually sends 'GG'. */
	do {
		temp_response = server->recvAll();
	} while (temp_response == NULL);
	response = std::string(temp_response);
	
	server->sendAll("U2");
	display_text_centered("Connection received from " + server->get_peer_addr());
	Timer timer = timer_init(3); 
	while (!timer_done(timer)); // Wait for five seconds
	
	type.mode = M_SERVER;
	type.netsock = server;
	return type;
}

GameType check_client(char* code_text) {
	GameType type;
	std::vector<std::string> addr_port;
	std::string connect_code = std::string(code_text); /* The connect code is a special string, that contains the server address and port. It is given by the server. */
	try {
		addr_port = connect_code::decode(connect_code);
		Client* client = new Client(ES_UDP, addr_port[0].data(), std::stoi(addr_port[1]));
		client->create_socket();
		/* Send a specific message to the server, and wait for the appropriate response, to know that the server is ready */
		client->sendAll("GG");
		std::string msg_from_server = client->recvAllNB();
		if (msg_from_server == "U2") {
			display_text_centered("Connection made");
			Timer timer = timer_init(3);
			while (!timer_done(timer));
		} else {
			throw std::invalid_argument("Server didn't respond with correct message.");
		}
		type.mode = M_CLIENT;
		type.netsock = client;
		return type;
	} catch (int e) {
		throw;
	} catch (std::exception& e) {
		throw;
	}
}