Complete Order and OrderDao

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

@@ -1,25 +1,70 @@
 package dev.dao;
 
+import dev.database.DatabaseConnection;
 import dev.model.Order;
 
+import java.sql.*;
+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) VALUES (?, ?) RETURNING id";
+
+        try (
+                Connection connection = DatabaseConnection.getConnection();
+                PreparedStatement statement = connection.prepareStatement(sql)
+        ) {
+
+            statement.setInt(1, order.getUserId());
+            statement.setDouble(2, order.getTotalPrice());
+
+            ResultSet resultSet = statement.executeQuery();
+
+            if (resultSet.next()) {
+                return resultSet.getInt("id");
+            }
+
+        } catch (SQLException e) {
+            System.out.println("Error saving order: " + e.getMessage());
+        }
 
         return -1;
     }
 
     public List<Order> findByUserId(int userId) {
 
-        // TODO:
-        // Retrieve all orders of a user
+        String sql = "SELECT id, user_id, created_at, total_price FROM orders WHERE user_id = ?";
 
-        return null;
+        List<Order> orders = new ArrayList<>();
+
+        try (
+                Connection connection = DatabaseConnection.getConnection();
+                PreparedStatement statement = connection.prepareStatement(sql)
+        ) {
+
+            statement.setInt(1, userId);
+
+            ResultSet resultSet = statement.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) {
+            System.out.println("Error loading orders: " + e.getMessage());
+        }
+
+        return orders;
     }
-
 }

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

@@ -12,4 +12,35 @@ public class Order {
 
     private double totalPrice;
 
+    public int getId() {
+        return id;
+    }
+
+    public void setId(int id) {
+        this.id = id;
+    }
+
+    public int getUserId() {
+        return userId;
+    }
+
+    public void setUserId(int userId) {
+        this.userId = userId;
+    }
+
+    public LocalDateTime getCreatedAt() {
+        return createdAt;
+    }
+
+    public void setCreatedAt(LocalDateTime createdAt) {
+        this.createdAt = createdAt;
+    }
+
+    public double getTotalPrice() {
+        return totalPrice;
+    }
+
+    public void setTotalPrice(double totalPrice) {
+        this.totalPrice = totalPrice;
+    }
 }