BathhouseManagment/Database/DiscountRepository.cs

using System;
using System.Collections.Generic;
using BathHouseManagmet.Models;
using Microsoft.Extensions.Options;
using MySqlConnector;

namespace BathHouseManagmet.Database;

public class DiscountRepository
{
    MySqlConnection connection;

    public DiscountRepository(IOptions<DatabaseConnection> connect)
    {
        connection = new MySqlConnection(connect.Value.ConnectionString);
    }

    public List<Discount> GetDiscounts()
    {
        List<Discount> result = new();
        string sql = "select * from `discount`";
        try
        {
            connection.Open();
            using (var command = new MySqlCommand(sql, connection))
            using (var reader = command.ExecuteReader())
            {
                while (reader.Read())
                {
                    result.Add(new Discount
                    {
                        Id = reader.GetInt32("id"),
                        Name = reader.GetString("name"),
                        Description = reader.GetString("description"),
                        DiscountPercent =  reader.GetInt32("discount_percent")
                    });
                }
            }
            connection.Close();
        }
        catch (Exception e)
        {
            Console.WriteLine(e);
        }
        return result;
    }

    public bool InsertDiscount(Discount discount)
    {
        string sql = 
            "insert into `discount` (`id`, `name`, `description`, `discount_percent`) values (0, @name, @description, @discount_percent)";
        try
        {
            connection.Open();
            using (var command = new MySqlCommand(sql, connection))
            {
                command.Parameters.AddWithValue("@id", discount.Id);
                command.Parameters.AddWithValue("@name", discount.Name);
                command.Parameters.AddWithValue("@description", discount.Description);
                command.Parameters.AddWithValue("@discount_percent", discount.DiscountPercent);
            }
            connection.Close();
        }
        catch (Exception e)
        {
            connection.Close();
            return false;
        }
        connection.Close();
        return false;
    }
    
    public bool UpdateDiscount(Discount discount)
    {
        string sql = 
            "update `discount` set name = @name, description = @description, discount_percent = @discount_percent";
        try
        {
            connection.Open();
            using (var command = new MySqlCommand(sql, connection))
            {
                command.Parameters.AddWithValue("@id", discount.Id);
                command.Parameters.AddWithValue("@name", discount.Name);
                command.Parameters.AddWithValue("@description", discount.Description);
                command.Parameters.AddWithValue("@discount_percent", discount.DiscountPercent);
            }
            connection.Close();
        }
        catch (Exception e)
        {
            connection.Close();
            return false;
        }
        connection.Close();
        return false;
    }

    public bool DeleteDiscount(Discount discount)
    {
        string sql = "delete from `discount` where `id` = " + discount.Id;
        try
        {
            connection.Open();
            using (var command = new MySqlCommand(sql, connection))
            {
                command.ExecuteNonQuery();
            }
            connection.Close();
        }
        catch (Exception e)
        {
            connection.Close();
            return false;
        }
        connection.Close();
        return true;
    }
}