Implement Todos for database and management service

src/main/java/dev/dao/MenuItemDao.java

@@ -1,25 +1,57 @@
 package dev.dao;
 
+import dev.database.DatabaseConnection;
 import dev.model.MenuItem;
 
+import java.sql.Connection;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.ArrayList;
 import java.util.List;
 
 public class MenuItemDao {
 
     public List<MenuItem> findAll() {
-
-        // TODO:
-        // Retrieve all menu items
-
-        return null;
+        List<MenuItem> items = new ArrayList<>();
+        String sql = "SELECT * FROM menu_items";
+        try (Connection conn = DatabaseConnection.getConnection();
+             PreparedStatement stmt = conn.prepareStatement(sql);
+             ResultSet rs = stmt.executeQuery()) {
+            while (rs.next()) {
+                MenuItem item = new MenuItem();
+                item.setId(rs.getInt("id"));
+                item.setName(rs.getString("name"));
+                item.setDescription(rs.getString("description"));
+                item.setPrice(rs.getDouble("price"));
+                item.setCategory(rs.getString("category"));
+                items.add(item);
+            }
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+        return items;
     }
 
     public MenuItem findById(int id) {
-
-        // TODO:
-        // Find menu item by id
-
+        String sql = "SELECT * FROM menu_items WHERE id = ?";
+        try (Connection conn = DatabaseConnection.getConnection();
+             PreparedStatement stmt = conn.prepareStatement(sql)) {
+            stmt.setInt(1, id);
+            try (ResultSet rs = stmt.executeQuery()) {
+                if (rs.next()) {
+                    MenuItem item = new MenuItem();
+                    item.setId(rs.getInt("id"));
+                    item.setName(rs.getString("name"));
+                    item.setDescription(rs.getString("description"));
+                    item.setPrice(rs.getDouble("price"));
+                    item.setCategory(rs.getString("category"));
+                    return item;
+                }
+            }
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
         return null;
     }
-
 }