Beauty_Salon/BeautySalon/BeautySalonDBModels/Implements/ChequeDatabase.cs

using BeautySalonDBModels.Models;
using Npgsql;
using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace BeautySalonDBModels.Implements
{
    public class ChequeDatabase : AbstractWorkWithStorage<Cheque>
    {
        public override void Add(Cheque cheque)
        {
            using var conn = GetConnection();
            conn.Open();
            using var cmd = new NpgsqlCommand("INSERT INTO cheques (cheque_id, client_id, service_id, master_id, date_reception, price)" +
                " VALUES (nextval('seq_cheque'), @ClientId, @service_id, @master_id, @DateReception, @Price)", conn);
            cmd.Parameters.AddWithValue("@ClientId", cheque.ClientId);
            cmd.Parameters.AddWithValue("@master_id", cheque.MasterId);
            cmd.Parameters.AddWithValue("@service_id", cheque.ServiceId);
            cmd.Parameters.AddWithValue("@Price", cheque.Price);
            cmd.Parameters.AddWithValue("@DateReception", cheque.DateReception);
            cmd.ExecuteNonQuery();
        }

        public override Cheque? GetObject(int id)
        {
            using var conn = GetConnection();
            conn.Open();
            using var cmd = new NpgsqlCommand("SELECT * FROM cheques WHERE cheque_id = @id", conn);
            cmd.Parameters.AddWithValue("@id", id);
            using var reader = cmd.ExecuteReader();
            if (reader.Read())
            {
                return new Cheque
                {
                    ChequeId = reader.GetInt32(0),
                    ClientId = reader.GetInt32(1),
                    ServiceId = reader.GetInt32(4),
                    MasterId = reader.GetInt32(3),
                    DateReception = reader.GetFieldValue<DateTime>(5),
                    Price = reader.GetDouble(2),
                };
            }
            return null;
        }

        public override List<Cheque> GetObjects()
        {
            var cheques = new List<Cheque>();
            using var conn = GetConnection();
            conn.Open();
            using var cmd = new NpgsqlCommand("SELECT * FROM cheques order by cheque_id", conn);
            using var reader = cmd.ExecuteReader();
            while (reader.Read())
            {
                cheques.Add(new Cheque
                {
                    ChequeId = reader.GetInt32(0),
                    ClientId = reader.GetInt32(1),
                    ServiceId = reader.GetInt32(4),
                    MasterId = reader.GetInt32(3),
                    DateReception = reader.GetFieldValue<DateTime>(5),
                    Price = reader.GetDouble(2),
                });
            }
            return cheques;
        }

        public override Cheque? Remove(int id)
        {
            var cheque = GetObject(id);
            using var conn = GetConnection();
            conn.Open();
            using var cmd = new NpgsqlCommand("delete from cheques where cheque_id = @id", conn);
            cmd.Parameters.AddWithValue("@id", id);
            cmd.ExecuteNonQuery();
            return cheque;
        }

        public override void Update(Cheque cheque)
        {
            using var conn = GetConnection();
            conn.Open();
            using var cmd = new NpgsqlCommand("update cheques set client_id = @ClientId, " +
                "master_id = @MasterId, service_id = @ServiceId, price = @Price, date_reception = @DateReception where cheque_id = @ChequeId", conn);
            cmd.Parameters.AddWithValue("@ClientId", cheque.ClientId);
            cmd.Parameters.AddWithValue("@MasterId", cheque.MasterId);
            cmd.Parameters.AddWithValue("@ServiceId", cheque.ServiceId);
            cmd.Parameters.AddWithValue("@ChequeId", cheque.ChequeId);
            cmd.Parameters.AddWithValue("@Price", cheque.Price);
            cmd.Parameters.AddWithValue("@DateReception", cheque.DateReception);
            cmd.ExecuteNonQuery();
        }

        public string GetClientFIO(Cheque cheque)
        {
            ClientDatabase db = new ClientDatabase();

            int clientId = cheque.ClientId;

            List<Client> clients = db.GetObjects();

            foreach (Client c in clients)
            {
                if (c.ClientId == clientId) return c.FIO.ToString();
            }
            return string.Empty;
        }

        public string GetMasterFIO(Cheque cheque)
        {
            MasterDatabase db = new MasterDatabase();

            int masterId = cheque.MasterId;

            List<Master> masters = db.GetObjects();

            foreach (Master c in masters)
            {
                if (c.MasterId == masterId) return c.FIO.ToString();
            }
            return string.Empty;
        }

        public string GetServiceName(Cheque cheque)
        {
            ServiceDatabase db = new ServiceDatabase();

            int serviceId = cheque.ServiceId;

            List<Service> service = db.GetObjects();

            foreach (Service s in service)
            {
                if (s.ServiceId == serviceId) return s.ServiceName.ToString();
            }
            return string.Empty;
        }
    }
}