feat(menu): add menu class

include/menu.hpp

@@ -0,0 +1,22 @@
+#pragma once
+#define MENU_ITEM_COUNT 4
+#include <Arduino.h>
+#include "joystick.hpp"
+
+typedef struct {
+  String name;
+  void (*action)();
+} Item;
+
+class Menu {
+  public:
+    Menu(Item* items);
+    void updateCurrentItem(JoystickDirection& direction);
+    void execute();
+
+    Item& getItemAt(size_t index);
+    size_t getCurrentItemIndex() const;
+  private:
+    Item items[MENU_ITEM_COUNT];
+    int currentItem;
+};

src/menu.cpp

@@ -0,0 +1,34 @@
+#include "menu.hpp"
+
+Menu::Menu(Item* items) : currentItem(0) {
+  for (int i = 0; i < MENU_ITEM_COUNT; i++) {
+    this->items[i] = items[i];
+  }
+}
+
+void Menu::updateCurrentItem(JoystickDirection &direction) {
+  switch (direction) {
+    case JoystickDirection::UP:
+      currentItem = (currentItem - 1 + MENU_ITEM_COUNT) % MENU_ITEM_COUNT;
+      break;
+    case JoystickDirection::DOWN:
+      currentItem = (currentItem + 1) % MENU_ITEM_COUNT;
+      break;
+    default:
+      break;
+  }
+}
+
+void Menu::execute() {
+  if (items[currentItem].action) {
+    items[currentItem].action();
+  }
+}
+
+Item& Menu::getItemAt(size_t index) {
+  return items[index];
+}
+
+size_t Menu::getCurrentItemIndex() const {
+  return currentItem;
+}