c969-project/C969Project/Data/DatabaseHelper.cs

using C969Project.Data.Models;
using MySql.Data.MySqlClient;

namespace C969Project.Data;

public static class DatabaseHelper 
{
    
    
    public static void Initialize()
    {
        
    }

    public static User? Login(string username, string password)
    {
        using MySqlConnection connection = new MySqlConnection(AppSettings.GetSetting("ConnectionStrings", "DefaultConnection"));
        try
        {
            connection.Open();
        }
        catch (MySqlException ex)
        {
            Console.WriteLine(ex.Message);
        }
        
        string query = $"SELECT * FROM client_schedule.user WHERE userName = '{username}'";
        using MySqlCommand command = new MySqlCommand(query, connection);
        using MySqlDataReader reader = command.ExecuteReader();

        while (reader.Read())
        {
            string name = reader.GetString("userName");
            string pass = reader.GetString("password");

            if (name == username && password == pass)
            {
                int id = reader.GetInt32("userId");
                return new User(id, name);
            }
        }
        
        return null;
    }

    public static List<Customer> RetrieveCustomers()
    {
        using MySqlConnection connection = new MySqlConnection(AppSettings.GetSetting("ConnectionStrings", "DefaultConnection"));
        try
        {
            connection.Open();
        }
        catch (MySqlException e)
        {
            Console.WriteLine(e);
            throw;
        }
        
        List<Customer> customers = new List<Customer>();
        
        using MySqlCommand command = new MySqlCommand("SELECT * FROM client_schedule.customer", connection);
        using MySqlDataReader reader = command.ExecuteReader();
        while (reader.Read())
        {
            var customer = new Customer()
            {
                CustomerId = reader.GetInt32("customerId"),
                CustomerName = reader.GetString("customerName"),
                AddressId = reader.GetInt32("addressId"),
                Active = reader.GetInt32("active"),
                CreateDate = reader.GetDateTime("createDate"),
                CreatedBy = reader.GetString("createdBy"),
                LastUpdate = reader.GetDateTime("lastUpdate"),
                LastUpdateBy = reader.GetString("lastUpdateBy"),
            };
            
            customers.Add(customer);
        }
        
        return customers;
    }

    public static void AddCustomer(Customer customer)
    {
        using MySqlConnection connection = new MySqlConnection(AppSettings.GetSetting("ConnectionStrings", "DefaultConnection"));
        try
        {
            connection.Open();

            string query = 
                "INSERT INTO customer (customerId, customerName, addressId, active, createDate, createdBy, lastUpdate, lastUpdateBy) " +
                "VALUES (@customerId, @customerName, @addressId, @active, @createDate, @createdBy, @lastUpdate, @lastUpdateBy)";
            
            using MySqlCommand command = new MySqlCommand(query, connection);
            
            command.Parameters.AddWithValue("@customerId", customer.CustomerId);
            command.Parameters.AddWithValue("@customerName", customer.CustomerName);
            command.Parameters.AddWithValue("@addressId", customer.AddressId);
            command.Parameters.AddWithValue("@active", customer.Active);
            command.Parameters.AddWithValue("@createDate", DateTime.UtcNow);
            command.Parameters.AddWithValue("@createdBy", AppState.CurrentUser.Username);
            command.Parameters.AddWithValue("@lastUpdate", DateTime.UtcNow);
            command.Parameters.AddWithValue("@lastUpdateBy", AppState.CurrentUser.Username);
            
            int rowsAffected = command.ExecuteNonQuery();
            
            
        }
        catch (MySqlException e)
        {
            Console.WriteLine($"MySQL Error: {e.Message}");
            throw; 
        }
        catch (Exception ex)
        {
            Console.WriteLine($"General Error: {ex.Message}");
            throw;
        }
    }
}