implement OrderDetail.java

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

@@ -1,23 +1,74 @@
 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
+        List<MenuItem> items = new ArrayList<>();
 
-        return null;
+        // Retrieve all menu items
+        try ( Connection connection = DatabaseConnection.getConnection();
+             PreparedStatement preparedStatement = connection.prepareStatement("SELECT * FROM menu_items");
+             ResultSet resultSet = preparedStatement.executeQuery()) {
+
+            while (resultSet.next()) {
+
+                MenuItem menuItem = new MenuItem();
+
+                menuItem.setId(resultSet.getInt("id"));
+                menuItem.setName(resultSet.getString("name"));
+                menuItem.setDescription(resultSet.getString("description"));
+                menuItem.setPrice(resultSet.getDouble("price"));
+                menuItem.setCategory(resultSet.getString("category"));
+
+                items.add(menuItem);
+            }
+        }
+        catch (SQLException e) {
+            throw new RuntimeException(e);
+        }
+
+        return items;
     }
 
     public MenuItem findById(int id) {
 
-        // TODO:
         // Find menu item by id
+        String sql = "SELECT * FROM menu_items WHERE id=?";
+
+        try (Connection connection = DatabaseConnection.getConnection();
+             PreparedStatement preparedStatement = connection.prepareStatement(sql)) {
+
+            preparedStatement.setInt(1, id);
+
+            ResultSet resultSet = preparedStatement.executeQuery();
+
+            if(resultSet.next()) {
+
+                MenuItem menuItem = new MenuItem();
+
+                menuItem.setId(resultSet.getInt("id"));
+                menuItem.setName(resultSet.getString("name"));
+                menuItem.setDescription(resultSet.getString("description"));
+                menuItem.setPrice(resultSet.getDouble("price"));
+                menuItem.setCategory(resultSet.getString("category"));
+
+                return menuItem;
+            }
+
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        }
 
         return null;
     }

src/main/java/dev/dao/OrderDao.java

@@ -1,25 +1,67 @@
 package dev.dao;
 
+import dev.database.DatabaseConnection;
 import dev.model.Order;
 
+import java.sql.*;
+import java.time.LocalDateTime;
+import java.util.ArrayList;
 import java.util.List;
 
 public class OrderDao {
 
     public int save(Order order) {
 
-        // TODO:
         // Insert order and return generated id
+        String sql = "INSERT INTO orders (user_id, total_price, created_at) VALUES(?, ?, ?) RETURNING id";
+
+        try (Connection connection = DatabaseConnection.getConnection();
+             PreparedStatement preparedStatement = connection.prepareStatement(sql)){
+
+            preparedStatement.setInt(1, order.getUserId());
+            preparedStatement.setDouble(2, order.getTotalPrice());
+            preparedStatement.setTimestamp(3, Timestamp.valueOf(LocalDateTime.now()));
+
+            ResultSet resultSet = preparedStatement.executeQuery();
+
+            if(resultSet.next()) return resultSet.getInt("id");
+
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        }
 
         return -1;
     }
 
     public List<Order> findByUserId(int userId) {
 
-        // TODO:
         // Retrieve all orders of a user
+        String sql = "SELECT * FROM orders WHERE user_id=?";
+        List<Order> orders = new ArrayList<>();
 
-        return null;
+        try(Connection connection = DatabaseConnection.getConnection();
+            PreparedStatement preparedStatement = connection.prepareStatement(sql) ) {
+
+            preparedStatement.setInt(1, userId);
+
+            ResultSet resultSet = preparedStatement.executeQuery();
+
+            while (resultSet.next()) {
+
+                Order order = new Order();
+
+                order.setId(resultSet.getInt("id"));
+                order.setUserId(resultSet.getInt("user_id"));
+                order.setCreatedAt(resultSet.getTimestamp("created_at").toLocalDateTime());
+                order.setTotalPrice(resultSet.getDouble("total_price"));
+
+                orders.add(order);
+            }
+
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        }
+        return orders;
     }
 
 }

src/main/java/dev/model/MenuItem.java

@@ -12,4 +12,9 @@ public class MenuItem {
 
     private String category;
 
+    public void setId(int id) { this.id = id; }
+    public void setName(String name) { this.name = name; }
+    public void setDescription(String description) { this.description = description; }
+    public void setPrice(double price) { this.price = price; }
+    public void setCategory(String category) { this.category = category; }
 }

src/main/java/dev/model/Order.java

@@ -12,4 +12,13 @@ public class Order {
 
     private double totalPrice;
 
+    public void setId(int id) { this.id = id; }
+    public void setUserId(int userId) { this.userId = userId; }
+    public void setCreatedAt(LocalDateTime createdAt) { this.createdAt = createdAt; }
+    public void setTotalPrice(double totalPrice) { this.totalPrice = totalPrice; }
+
+    public int getId() { return id; }
+    public double getTotalPrice() { return totalPrice; }
+    public int getUserId() { return userId; }
+    public LocalDateTime getCreatedAt() { return createdAt; }
 }

src/main/java/dev/model/OrderDetail.java

@@ -12,4 +12,17 @@ public class OrderDetail {
 
     private double price;
 
+    public void setId(int id) { this.id = id; }
+    public void setOrderId(int orderId) { this.orderId = orderId; }
+    public void setMenuItemId(int menuItemId) { this.menuItemId = menuItemId; }
+    public void setQuantity(int quantity) { this.quantity = quantity; }
+    public void setPrice(double price) { this.price = price; }
+
+
+    public int getId() { return id; }
+    public int getOrderId() { return orderId; }
+    public int getMenuItemId() { return menuItemId; }
+    public int getQuantity() { return  quantity; }
+    public double getPrice() { return price; }
+
 }