[Add] Not your boring main menu.

assets/menu_background_snippets.txt

@@ -0,0 +1,34 @@
+map -sV 10.0.2.15
+ls -la /etc/
+ps aux | grep 'sshd'
+gcc exploit.c -o exploit
+SELECT * FROM users;
+import requests
+while(true){};
+});
+sudo rm -rf /
+netstat -anp
+arp -a
+ssh root@192.168.1.1
+git commit -m 'Initial commit'
+hydra -l user -P wordlist.txt ftp://...
+Hello, world.
+All your base are belong to us
+// TODO: fix this later
+42
+1337
+zerocool
+acidburn
+cereal_killer
+ping -c 4 google.com
+traceroute 8.8.8.8
+</div>
+<a>
+password123
+GOD
+Have you tried turning it off and on again?
+Connection established.
+SYN/ACK
+Firewall breach detected.
+Decrypting /etc/shadow...
+root::0:0:root:/root:/bin/bash

client/src/game_state.cpp

@@ -1,13 +1,17 @@
 #include <cstdio>
 #include <memory>
 #include <sstream>
+#include <thread>
+#include <chrono>
 
+#include "../../server/src/network_manager.h"
 #include "game_state.h"
 #include "gfx/shape_renderer.h"
 #include "gfx/txt_renderer.h"
 #include "terminal.h"
 #include "ui/desktop.h"
 #include "ui/ui_window.h"
+#include <ui/main_menu.h>
 
 void GameState::_init_desktop(void) {
   _desktop = std::make_unique<Desktop>();
@@ -18,15 +22,41 @@ void GameState::_init_desktop(void) {
   _desktop->add_window(std::move(term_window));
 }
 
+void GameState::_run_server(void) {
+  try {
+    NetworkManager server;
+    server.start(1337);
+    /*
+     * Server's start() method is non-blocking, but NetworkManager
+     * object must be kept alive. We'll just loop forever and let the OS
+     * clean up the thread when main exits ;)
+     */
+    while(true) {
+      std::this_thread::sleep_for(std::chrono::seconds(5));
+    }
+  } catch(const std::exception& e) {
+    fprintf(stderr, "Single-player server thread exception: %s\n", e.what());
+  }
+}
+
 GameState::GameState(void) : _current_screen(Screen::MAIN_MENU) {}
 
 GameState::~GameState(void) = default;
 
-void GameState::init(void) {
+void GameState::init(int screen_width, int screen_height) {
   /* Create and connect the network client. */
   _network = std::make_unique<ClientNetwork>();
 
-  /* TODO: For now, connect immediately, later, trigger by menu option. */
+  _main_menu = std::make_unique<MainMenu>(screen_width, screen_height);
+}
+
+void GameState::start_single_player_now(int screen_width, int screen_height) {
+  fprintf(stdout, "Starting in single-player mode...\n");
+  std::thread server_thread(&GameState::_run_server, this);
+  server_thread.detach();
+  std::this_thread::sleep_for(std::chrono::milliseconds(200));
+
+  _network = std::make_unique<ClientNetwork>();
   if(!_network->connect("127.0.0.1", 1337)) {
     /* TODO: Handle connection failure. */
   }
@@ -37,7 +67,9 @@ void GameState::init(void) {
 void GameState::handle_event(SDL_Event* event) {
   switch(_current_screen) {
   case Screen::MAIN_MENU:
-    /* TODO: */
+    if(_main_menu) {
+      _main_menu->handle_event(event);
+    }
     break;
   case Screen::BOOTING:
     /* TODO: */
@@ -52,13 +84,33 @@ void GameState::handle_event(SDL_Event* event) {
 
 void GameState::update(void) {
   switch(_current_screen) {
-  case Screen::MAIN_MENU:
+  case Screen::MAIN_MENU: {
-    /* TODO: */
+    if(!_main_menu) break;
+    Screen next_screen = _main_menu->update();
+    if(next_screen != Screen::MAIN_MENU) {
+      _current_screen = next_screen;
+      _main_menu.reset(); /* Free mem. */
+
+      if(_current_screen == Screen::BOOTING) {
+        fprintf(stdout, "Starting in single-player mode...\n");
+        std::thread server_thread(&GameState::_run_server, this);
+          server_thread.detach();
+          std::this_thread::sleep_for(std::chrono::milliseconds(200));
+
+        if(!_network->connect("127.0.0.1", 1337)) {
+          /* TODO: Handle connection failure. */
+        }
+        /* TODO: transition to book screen. */
+        _current_screen = Screen::DESKTOP;
+        _init_desktop();
+      }
+    }
     break;
+  }
   case Screen::BOOTING:
     /* TODO: */
     break;
-  case Screen::DESKTOP:
+  case Screen::DESKTOP: {
     std::string server_msg;
       while(_network->poll_message(server_msg)) {
         UIWindow* focused_window = _desktop->get_focused_window();
@@ -94,12 +146,15 @@ void GameState::update(void) {
       break;
     }
   }
+}
 
 void GameState::render(ShapeRenderer* shape_renderer, TextRenderer* txt_renderer,
                        int screen_height, bool show_cursor) {
   switch(_current_screen) {
   case Screen::MAIN_MENU:
-    /* TODO: */
+    if(_main_menu) {
+      _main_menu->render(shape_renderer, txt_renderer);
+    }
     break;
   case Screen::BOOTING:
     /* TODO: */

client/src/game_state.h

@@ -4,6 +4,7 @@
 
 class ClientNetwork;
 class Desktop;
+class MainMenu;
 class ShapeRenderer;
 class TextRenderer;
 union SDL_Event;
@@ -19,7 +20,8 @@ public:
   GameState(void);
   ~GameState(void);
 
-  void init(void);
+  void init(int screen_width, int screen_height);
+  void start_single_player_now(int screen_width, int screen_height);
   void handle_event(SDL_Event* event);
   void update(void);
   void render(ShapeRenderer* shape_renderer, TextRenderer* txt_renderer,
@@ -28,7 +30,9 @@ public:
 private:
   std::unique_ptr<ClientNetwork> _network;
   std::unique_ptr<Desktop>       _desktop;
+  std::unique_ptr<MainMenu>      _main_menu;
   Screen                         _current_screen;
 
   void _init_desktop(void);
+  void _run_server(void);
 };

client/src/main.cpp

@@ -1,47 +1,17 @@
 #include <memory>
 #include <cstdio>
+#include <string>
 #include <GL/glew.h>
 #include <SDL3/SDL.h>
 #include <SDL3/SDL_keyboard.h>
 
-/* For single player mode. */
-#include <string>
-#include <thread>
-#include <chrono>
-#include "../../server/src/network_manager.h"
-
 #include "gfx/shape_renderer.h"
 #include "gfx/txt_renderer.h"
 #include "game_state.h"
 
-void run_server(void) {
-  try {
-    NetworkManager server;
-    server.start(1337);
-    /*
-     * Server's start() method is non-blocking, but NetworkManager
-     * object must be kept alive. We'll just loop forever and let the OS
-     * clean up the thread when main exits ;)
-     */
-    while(true) {
-      std::this_thread::sleep_for(std::chrono::seconds(5));
-    }
-  } catch(const std::exception& e) {
-    fprintf(stderr, "Single-player server thread exception: %s\n", e.what());
-  }
-}
-
 const int SCREEN_WIDTH  = 1280;
 const int SCREEN_HEIGHT = 720;
 int main(int argc, char** argv) {
-  if(argc > 1 && std::string(argv[1]) == "-sp") {
-    fprintf(stdout, "Starting in single-player mode...\n");
-    std::thread server_thread(run_server);
-    server_thread.detach();
-    fprintf(stdout, "Waiting for server initialise...\n");
-    std::this_thread::sleep_for(std::chrono::milliseconds(200));
-  }
-
   /* Init SDL. */
   if(!SDL_Init(SDL_INIT_VIDEO)) {
     printf("SDL could not initialise! SDL_ERROR: %s\n", SDL_GetError());
@@ -104,7 +74,11 @@ int main(int argc, char** argv) {
   ShapeRenderer* shape_renderer_instance = new ShapeRenderer(SCREEN_WIDTH, SCREEN_HEIGHT);
 
   auto game_state = std::make_unique<GameState>();
-  game_state->init();
+  if(argc > 1 && std::string(argv[1]) == "-sp") {
+    game_state->start_single_player_now(SCREEN_WIDTH, SCREEN_HEIGHT);
+  } else {
+    game_state->init(SCREEN_WIDTH, SCREEN_HEIGHT);
+  }
 
   /* timer for cursor blink. */
   Uint32 last_blink_time = 0;

client/src/ui/main_menu.cpp

@@ -0,0 +1,142 @@
+#include <SDL3/SDL_events.h>
+#include <fstream>
+#include <vector>
+
+#include "gfx/shape_renderer.h"
+#include "gfx/txt_renderer.h"
+
+#include "main_menu.h"
+
+/* Get a random snippet form loaded word list. */
+const std::string& get_random_snippet(const std::vector<std::string>& snippets) {
+  /* If empty, return a default to avoid a crash? */
+  if(snippets.empty()) {
+    static const std::string empty_str = "ERROR: snippets file not found";
+    return empty_str;
+  }
+  int index = rand() % snippets.size();
+  return snippets[index];
+}
+
+MainMenu::MainMenu(int screen_width, int screen_height) :
+    _screen_width(screen_width), _screen_height(screen_height),
+    _next_screen(Screen::MAIN_MENU) {
+
+  /* Load snippets form file. */
+  std::ifstream snippet_file("assets/menu_background_snippets.txt");
+  if(!snippet_file.is_open()) {
+    printf("ERROR: Failed to open assets/menu_background_snippets.txt\n");
+  } else {
+    std::string line;
+    while(std::getline(snippet_file, line)) {
+      if(!line.empty()) {
+        _snippets.push_back(line);
+      }
+    }
+  }
+
+  /* Initialise buttons. */
+  const int button_width  = 200;
+  const int button_height = 50;
+  const int center_x = (screen_width/2) - (button_width/2);
+  const int center_y = (screen_height/2);
+
+  _buttons.push_back({
+    "Single-Player",
+    { center_x, center_y + 30, button_width, button_height },
+    Screen::BOOTING, /* This will trigger the booting screen. */
+    false
+  });
+  _buttons.push_back({
+    "Online",
+    { center_x, center_y - 30, button_width, button_height },
+    Screen::BOOTING,
+    false
+  });
+
+  /* Initialise animated background. */
+  srand(time(NULL));
+  for(int i = 0; i < 100; ++i) {
+    _background_text.push_back({
+      get_random_snippet(_snippets),
+      (float)(rand() % screen_width),
+      (float)(rand() % screen_height),
+      (float)(rand() % 50 + 20) / 100.0f /* Random speed. */
+    });
+  }
+}
+
+MainMenu::~MainMenu(void) {}
+
+void MainMenu::handle_event(SDL_Event* event) {
+  if(event->type == SDL_EVENT_MOUSE_MOTION) {
+    int mouse_x = event->motion.x;
+    int mouse_y = event->motion.y;
+    for(auto& button : _buttons) {
+      /* Invert mouse_y for UI coordinate system. */
+      int inverted_y = _screen_height - mouse_y;
+      button.is_hovered = (mouse_x >= button.rect.x
+        && mouse_x <= button.rect.x + button.rect.w
+        && inverted_y >= button.rect.y
+        && inverted_y <= button.rect.y + button.rect.h);
+    }
+  } else if(event->type == SDL_EVENT_MOUSE_BUTTON_DOWN) {
+    for(const auto& button : _buttons) {
+      if(button.is_hovered) {
+        _next_screen = button.action;
+        break; /* Once clicked button found, exit. */
+      }
+    }
+  }
+}
+
+Screen MainMenu::update(void) {
+  _update_background();
+  return _next_screen;
+}
+
+void MainMenu::render(ShapeRenderer* shape_renderer, TextRenderer* txt_renderer) {
+  _render_background(txt_renderer);
+
+  /* Button colours. */
+  const Color button_color        = { 0.1f, 0.15f, 0.2f };
+  const Color button_hover_color  = { 0.2f, 0.25f, 0.3f };
+  const Color text_color          = { 0.8f, 0.8f,  0.8f };
+
+  for(const auto& button : _buttons) {
+    /* Draw button background. */
+    if(button.is_hovered) {
+      shape_renderer->draw_rect(button.rect.x, button.rect.y, button.rect.w,
+                                button.rect.h, button_hover_color);
+    } else {
+      shape_renderer->draw_rect(button.rect.x, button.rect.y, button.rect.w,
+                                button.rect.h, button_color);
+    }
+
+    /*
+     * Draw button text centered.
+     * TODO: Calculate text width for perfect centering.
+     */
+    txt_renderer->render_text(button.label.c_str(), button.rect.x + 50,
+                              button.rect.y + 18, 1.0f, text_color);
+  }
+}
+
+void MainMenu::_update_background(void) {
+  for(auto& line : _background_text) {
+    line.y -= line.speed;
+    if(line.y < 0) {
+      line.y = _screen_height;
+      line.x = (float)(rand() % _screen_width);
+      line.text = get_random_snippet(_snippets);
+    }
+  }
+}
+
+void MainMenu::_render_background(TextRenderer* txt_renderer) {
+  const Color background_text_color = { 0.0f, 0.35f, 0.15f }; /* Dark green. */
+  for(const auto& line : _background_text) {
+    txt_renderer->render_text(line.text.c_str(), line.x, line.y, 1.0f, 
+                              background_text_color);
+  }
+}

client/src/ui/main_menu.h

@@ -0,0 +1,49 @@
+#pragma once
+
+#include <vector>
+#include <string>
+
+#include "gfx/txt_renderer.h"
+#include "gfx/shape_renderer.h"
+#include "gfx/types.h"
+#include "game_state.h"
+
+union SDL_Event;
+
+struct MenuButton {
+  std::string label;
+  Rect rect;
+  Screen action; /* Change state. */
+  bool is_hovered = false;
+};
+
+class MainMenu {
+public:
+  MainMenu(int screen_width, int screen_height);
+  ~MainMenu(void);
+
+  void handle_event(SDL_Event* event);
+  Screen update(void);
+  void render(ShapeRenderer* shape_renderer, TextRenderer* txt_renderer);
+
+private:
+  void _update_background(void);
+  void _render_background(TextRenderer* txdt_renderer);
+
+  /* For animated background. */
+  struct ScrollingText {
+    std::string text;
+    float x;
+    float y;
+    float speed;
+  };
+
+  std::vector<ScrollingText> _background_text;
+  int _screen_height;
+  int _screen_width;
+
+  /* Buttons. */
+  std::vector<MenuButton>  _buttons;
+  std::vector<std::string> _snippets;
+  Screen                   _next_screen;
+};