BathhouseManagment/Database/EmployeeRepository.cs

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

namespace BathHouseManagmet.Database;

public class EmployeeRepository
{
    MySqlConnection connection;

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

    public List<Employee> GetEmployees()
    {
        List<Employee> result = new();
        string sql = "select e.id as eid, e.position_id as pid, e.name as ename, e.surname as esurname, p.name as pname from employee e join position p on e.position_id = p.id";
        try
        {
            connection.Open();
            using (var command = new MySqlCommand(sql, connection))
            using (var reader = command.ExecuteReader())
            {
                while (reader.Read())
                {
                    result.Add(new Employee
                    {
                        /*
                        Id = reader.GetInt32("id"),
                        Name = reader.GetString("name"),
                        Surname = reader.GetString("surname"),
                        PositionId = reader.GetInt32("position_id"),
                        */
                        Id = reader.GetInt32("eid"),
                        Name = reader.GetString("ename"),
                        Surname = reader.GetString("esurname"),
                        Position = new Position()
                        {
                            Id = reader.GetInt32("pid"),
                            Name = reader.GetString("name"),
                        }
                    });
                }
            }
            connection.Close();
        }
        catch (Exception e)
        {
            Console.WriteLine(e);
        }
        return result;
    }

    public bool InsertEmployee(Employee employee)
    {
        string sql =
            "insert into `employee` (`id`, `name`, `surname`, `on_work`, `position_id`) values (0, @name, @surname, @on_work, @position_id)";
        try
        {
            connection.Open();
            using (var command = new MySqlCommand(sql, connection))
            {
                command.Parameters.AddWithValue("@name", employee.Name);
                command.Parameters.AddWithValue("@surname", employee.Surname);
                command.Parameters.AddWithValue("@position_id", employee.PositionId);
                command.ExecuteNonQuery();
            }
            connection.Close();
        }
        catch (Exception e)
        {
            connection.Close();
            return false;
        }
        connection.Close();
        return true;
    }

    public bool UpdateEmployee(Employee employee)
    {
        string sql = "update `employee` set name = @name, surname = @surname, on_work = @on_work, position_id = @position_id";
        try
        {
            connection.Open();
            using (var command = new MySqlCommand(sql, connection))
            {
                command.Parameters.AddWithValue("@name", employee.Name);
                command.Parameters.AddWithValue("@surname", employee.Surname);
                command.Parameters.AddWithValue("@position_id", employee.PositionId);
                command.ExecuteNonQuery();
            }
            connection.Close();
        }
        catch (Exception e)
        {
            connection.Close();
            return false;
        }
        connection.Close();
        return true;
    }

    public bool DeleteEmployee(Employee employee)
    {
        string sql = "delete from `employee` where `id` = " + employee.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;
    }
}