feat: Applied singleton pattern to Server class

Makefile

@@ -28,7 +28,7 @@ PARSER_PREFIXS	= Command User Pass Nick Quit PrivateMessage Join
 PARSER_FILES	= $(addsuffix Parser, $(PARSER_PREFIXS))
 PARSER_SRCS		= $(addprefix $(PARSER_DIR), $(PARSER_FILES))
 
-FILES 			= main Server User Channel utils Logger
+FILES 			= main Server User Channel libsUtils Logger
 
 SRCS_PATHS		= $(addprefix $(SRC_DIR)/, $(FILES)) $(CMD_SRCS) $(PARSER_SRCS)
 SRCS			= $(addsuffix .cpp, $(SRCS_PATHS))

includes/Channel.hpp

@@ -3,8 +3,6 @@
 
 # include "User.hpp"
 
-# include "ChannelException.hpp"
-
 # include "libsUtils.hpp"
 
 # define MAX_CHANNEL_NAME_LENGTH 20

includes/Server.hpp

@@ -38,6 +38,10 @@ class Server {
         std::vector<User>       _users;
         std::vector<Channel>    _channels;
 
+        // Singleton Pattern
+        static Server           *_server;
+        Server(const std::string port, const std::string password);
+
         bool isValidPort(const std::string port);
         void initServer();
         void listenClients();
@@ -48,15 +52,19 @@ class Server {
         std::vector<User>::iterator findUserByNickname(std::string nickname);
 
     public:
-        Server(const std::string port, const std::string password);
         ~Server();
+        static void init(std::string port, std::string password);
+        static Server &getInstance();
 
         std::vector<Channel>::iterator findChannel(std::string channelName);
 
-        void sendMessage(int clientFd, const std::string& message) const;
-        bool isValidPassword(const std::string& password);
+        //Getters
         User &getUserByFd(int clientFd);
         User &getUserByNickname(const std::string& nickname);
+
+        //Operations
+        void sendMessage(int clientFd, const std::string& message) const;
+        bool isValidPassword(const std::string& password);
         bool isNicknameInUse(const std::string& nickname);
         bool userHasCheckedPassword(int clientFd);
         void removeUser(int clientFd);

includes/User.hpp

@@ -54,10 +54,10 @@ class User {
 
         // Operations
         void checkPassword();
-        void makeRegistration(Server &server);
+        void makeRegistration();
         bool canRegister();
         void addChannel(Channel &channel);
-        void sendPrivateMessageToUser(const Server &server, const User &destination, const std::string& message);
+        void sendPrivateMessageToUser(const User &destination, const std::string& message);
 };
 
 #endif

includes/commands/ICommand.hpp

@@ -10,7 +10,7 @@ class ICommand {
     protected:
         bool _needValidate;
     public:
-        virtual void execute(Server &server, int clientFd) = 0;
+        virtual void execute(int clientFd) = 0;
         ICommand(bool needValidate) : _needValidate(needValidate) {};
 };
 

includes/commands/JoinCommand.hpp

@@ -8,7 +8,6 @@
 # include "Server.hpp"
 
 # include "libsUtils.hpp"
-# include "utils.hpp"
 
 /**
  * An ICommand implementation that is responsible for the binding and creation of a channel.
@@ -22,7 +21,7 @@ class JoinCommand : public ICommand {
         JoinCommand(std::map<std::string, std::string> _channels);
         ~JoinCommand();
 
-        void execute(Server &server, int fd);
+        void execute(int clientFd);
 };
 
 #endif

includes/commands/NickCommand.hpp

@@ -25,7 +25,7 @@ class NickCommand : public ICommand {
         NickCommand(const std::string& nickname);
         ~NickCommand(); 
 
-        void execute(Server &server, int clientFd);
+        void execute(int clientFd);
 };
 
 #endif

includes/commands/PassCommand.hpp

@@ -19,7 +19,7 @@ class PassCommand : public ICommand {
         PassCommand(const std::string& password);
         ~PassCommand();
 
-        void execute(Server &server, int clientFd);
+        void execute(int clientFd);
 };
 
 #endif

includes/commands/PrivateMessageCommand.hpp

@@ -17,7 +17,7 @@ class PrivateMessageCommand : public ICommand {
 
     public:
         PrivateMessageCommand(std::vector<std::string> receivers, std::string message);
-        void execute(Server &server, int fd);
+        void execute(int clientFd);
 };
 
 #endif

includes/commands/QuitCommand.hpp

@@ -19,7 +19,7 @@ class QuitCommand : public ICommand {
         QuitCommand(std::string msg);
         ~QuitCommand();
 
-        void execute(Server &server, int clientFd);
+        void execute(int clientFd);
 };
 
 #endif

includes/commands/UserCommand.hpp

@@ -20,7 +20,7 @@ class UserCommand : public ICommand {
     public:
         UserCommand();
         UserCommand(const std::string& username, const std::string& hostname, const std::string& serverName, const std::string& realName);
-        void execute(Server &server, int clientFd);
+        void execute(int clientFd);
         ~UserCommand();
 };
 

includes/libsUtils.hpp

@@ -8,12 +8,11 @@
 # include <cstdlib>
 # include <iostream>
 # include <sstream>
+# include <string>
 # include <algorithm>
 # include <vector>
 # include <unistd.h>
 
-# include "utils.hpp"
-
 # include "exceptions.hpp"
 
 # include "Logger.hpp"
@@ -23,6 +22,9 @@
 # define SUCCESS 0
 # define EXIT 1
 
+# define DEFAULT_PORT "6666"
+# define DEFAULT_PASS "1234"
+
 // ========================================= IRC SERVER ERROR MESSAGES =========================================
 # define INVALID_ARGS "[ERROR] Invalid args.\nUsage: ./ircserv <port> <password>"
 
@@ -37,13 +39,10 @@
 # define RECV_EXPT "[ERROR] Unable to receive message."
 # define SEND_EXPT "[ERROR] Unable to send message."
 
-# define INVALID_COMMAND "[ERROR] Invalid command sent to server socket." //???
-
-# define AUTH_ERR "[ERROR] Unauthorized.\nPlease send connection password and set your nickname and username."
-# define INVALID_PASSWORD "[ERROR] Password provided doesn't match server password."
-
 # define USER_NOT_FOUND_ERR "[ERROR] User not found in list."
-
 # define CHANNEL_ALREADY_ADDED_ERR "[ERROR] Channel already added."
-# define USER_ALREADY_IN_CHANNEL_ERR "[ERROR] User already in channel."
+
+std::string trim(const std::string& str);
+std::vector<std::string> split(const std::string &s, char delim);
+
 #endif

src/Server.cpp

@@ -1,5 +1,7 @@
 #include "Server.hpp"
 
+Server *Server::_server = NULL;
+
 /**
  * This function aims to validate the port number.
  * A valid port number is between 1 and 65535.
@@ -29,7 +31,6 @@ Server::Server(const std::string port, const std::string password) : _password(p
         throw ServerException(PORT_OUT_OF_RANGE_ERR);
     _port = std::atoi(port.c_str());
     this->initServer();
-    this->listenClients();
 }
 
 /**
@@ -41,6 +42,29 @@ Server::~Server() {
     this->closeConnections();
 }
 
+/**
+ * This function aims to initialize the server.
+ * 
+ * @param port The port number to listen for incoming connections.
+ * @param password The password to authenticate the clients.
+ *
+ */
+void Server::init(std::string port, std::string password) {
+    Server::_server = new Server(port, password);
+    Server::_server->listenClients();
+}
+
+/**
+ * This function aims to get the instance of the server.
+ * 
+ * @return The instance of the server.
+ */
+Server &Server::getInstance() {
+    if (Server::_server == NULL)
+        Server::_server = new Server(DEFAULT_PORT, DEFAULT_PASS);
+    return *Server::_server;
+}
+
 /**
  * This function aims to close all the connections.
  */
@@ -170,7 +194,7 @@ void Server::handleExistingConnection(int clientFd) {
     Logger::debug("Mensaje del cliente: " + std::string(buffer, readBytes));
     try {
         ICommand* command = CommandParser::parse(std::string(buffer, readBytes));
-        command->execute(*this, clientFd);
+        command->execute(clientFd);
     } catch (IRCException& e) {
         std::string clientNickname = getUserByFd(clientFd).getNickname();
         sendMessage(clientFd,
@@ -275,7 +299,7 @@ void Server::removeUser(int fd) {
  * @param clientFd The file descriptor of the user.
  */
 void Server::attemptUserRegistration(int clientFd) {
-    this->getUserByFd(clientFd).makeRegistration(*this);
+    this->getUserByFd(clientFd).makeRegistration();
 }
 
 /**

src/User.cpp

@@ -183,10 +183,9 @@ bool User::canRegister() {
 /**
  * This function try to register the user and verify that it is the same password as on the server.
  * 
- * @param server The server where the user is trying to register.
  */
-void User::makeRegistration(Server &server) {
-    if (!server.isValidPassword(_password))
+void User::makeRegistration() {
+    if (!Server::getInstance().isValidPassword(_password))
         throw PasswordMismatchException();
     this->_registered = true;   
 }
@@ -212,12 +211,11 @@ void User::addChannel(Channel &channel) {
 /**
  * This function aims to send a private message to a user.
  * 
- * @param server The server where the user is connected.
  * @param destination The user who will receive the message.
  * @param message The message to send.
  */
-void User::sendPrivateMessageToUser(const Server &server, const User &destination, const std::string& message) {
+void User::sendPrivateMessageToUser(const User &destination, const std::string& message) {
     Logger::debug("Sending private message to " + destination.getNickname() + " from " + this->getNickname() + ": " + message);
     std::string response = ":" + this->_nickname + " PRIVMSG " + destination.getNickname() + " :" + message;
-    server.sendMessage(destination.getFd(), response);
+    Server::getInstance().sendMessage(destination.getFd(), response);
 }

src/commands/JoinCommand.cpp

@@ -28,11 +28,11 @@ JoinCommand::~JoinCommand() {
 /**
  * Executes the command JOIN.
  * 
- * @param server The server where the command will be executed
  * @param clientFd The socket file descriptor of the client
  * 
  */
-void JoinCommand::execute(Server &server, int clientFd) {
+void JoinCommand::execute(int clientFd) {
+    Server& server = Server::getInstance();
     User user = server.getUserByFd(clientFd);
     std::vector<Channel> serverChannels = server.getChannels();
 

src/commands/NickCommand.cpp

@@ -20,7 +20,6 @@ NickCommand::~NickCommand() {}
 /**
  * Execute the command NICK.
  * 
- * @param server The server where the command will be executed
  * @param clientFd The socket file descriptor of the client
  * 
  * @throws `NoNicknameGivenException` If the nickname is empty
@@ -29,7 +28,8 @@ NickCommand::~NickCommand() {}
  * @throws `NicknameInUseException` If the nickname is already in use and the user is registered
  * 
  */
-void NickCommand::execute(Server &server, int clientFd) {
+void NickCommand::execute(int clientFd) {
+    Server& server = Server::getInstance();
     if (this->_nickname.empty())
         throw NoNicknameGivenException();
 

src/commands/PassCommand.cpp

@@ -20,13 +20,12 @@ PassCommand::~PassCommand() {}
 /**
  * Execute the command PASS.
  * 
- * @param server The server where the command will be executed
- * @param fd The socket file descriptor of the client
+ * @param clientFd The socket file descriptor of the client
  * 
  * @throws `AlreadyRegisteredException` If the user is already registered
- * 
  */
-void PassCommand::execute(Server &server, int clientFd) {
+void PassCommand::execute(int clientFd) {
+    Server& server = Server::getInstance();
     if (server.getUserByFd(clientFd).isRegistered())
         throw AlreadyRegisteredException();
     server.getUserByFd(clientFd).setPassword(_password);