Fixed error messages in commands

commands/nick.cpp

@@ -6,7 +6,7 @@
 /*   By: aortigos <aortigos@student.42malaga.com    +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2026/04/17 11:56:55 by aortigos          #+#    #+#             */
-/*   Updated: 2026/04/17 11:59:33 by aortigos         ###   ########.fr       */
+/*   Updated: 2026/04/17 12:45:36 by aortigos         ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -20,19 +20,40 @@ void	Server::cmd_nick(int fd, std::istringstream &ss)
 
 	if(!clients[fd].isAuthenticated())
 	{
-		send(fd, ERR_NOPASS.c_str(), ERR_NOPASS.size(), 0);
+		std::string	msg = ":ircserv 451 * :You have not registered\r\n";
+		send(fd, msg.c_str(), msg.size(), 0);
+		
 		return ;
 	}
 
-	if (!args.empty())
+	if (args.empty())
 	{
-		clients[fd].setNick(args);
-
-		std::string msg = "Your nick has been updated!\r\n";
+		std::string	msg = ":ircserv 431 * :No nickname given\r\n";
 		send(fd, msg.c_str(), msg.size(), 0);
+
+		return ;
 	}
-	else
+	
+	for (std::map<int, Client>::iterator it = clients.begin(); it != clients.end(); it++)
 	{
-		send(fd, ERR_NONICK.c_str(), ERR_NONICK.size(), 0);
+		if (it->second.getNick() == args)
+		{
+			std::string	msg = ":ircserv 433 * "
+								+ clients[fd].getNick()
+								+ " :Nickname is already in use\r\n";
+			send(fd, msg.c_str(), msg.size(), 0);
+
+			return;
+		}
 	}
+
+	clients[fd].setNick(args);
+
+	std::string msg = ":"
+						+ clients[fd].getNick()
+						+ " NICK "
+						+ args 
+						+ "\r\n";
+	send(fd, msg.c_str(), msg.size(), 0);
+
 }