LevelOS-Core/DAL/DALFornecerDE.cs

using Microsoft.Data.SqlClient;
using MLL;
using System;
using System.Collections.Generic;

namespace DALL
{
    public class DALFornecerDE
    {
        private readonly string connectionString;

        public DALFornecerDE(string conexao)
        {
            connectionString = conexao;
        }

        #region INSERT

        public bool Inserir(ModeloFornecerDE modelo)
        {
            using SqlConnection conn = new(connectionString);

            string sql = @"
            INSERT INTO Fornecer_DE
            (
                COD_FOR,
                COD_ITEM,
                ULTIMA
            )
            VALUES
            (
                @COD_FOR,
                @COD_ITEM,
                @ULTIMA
            )";

            using SqlCommand cmd = new(sql, conn);

            PreencherParametros(cmd, modelo);

            conn.Open();

            return cmd.ExecuteNonQuery() > 0;
        }

        #endregion

        #region UPDATE

        public bool Alterar(ModeloFornecerDE modelo)
        {
            using SqlConnection conn = new(connectionString);

            string sql = @"
            UPDATE Fornecer_DE SET

            COD_FOR=@COD_FOR,
            COD_ITEM=@COD_ITEM,
            ULTIMA=@ULTIMA

            WHERE ID_FORNECER_DE=@ID_FORNECER_DE";

            using SqlCommand cmd = new(sql, conn);

            PreencherParametros(cmd, modelo);

            cmd.Parameters.AddWithValue("@ID_FORNECER_DE",
                modelo.ID_FORNECER_DE);

            conn.Open();

            return cmd.ExecuteNonQuery() > 0;
        }

        #endregion

        #region DELETE

        public bool Excluir(int id)
        {
            using SqlConnection conn = new(connectionString);

            string sql =
                @"DELETE FROM Fornecer_DE
                  WHERE ID_FORNECER_DE=@ID";

            using SqlCommand cmd = new(sql, conn);

            cmd.Parameters.AddWithValue("@ID", id);

            conn.Open();

            return cmd.ExecuteNonQuery() > 0;
        }

        #endregion

        #region CARREGAR

        public ModeloFornecerDE? Carregar(int id)
        {
            using SqlConnection conn = new(connectionString);

            string sql =
                @"SELECT *
                  FROM Fornecer_DE
                  WHERE ID_FORNECER_DE=@ID";

            using SqlCommand cmd = new(sql, conn);

            cmd.Parameters.AddWithValue("@ID", id);

            conn.Open();

            using SqlDataReader dr = cmd.ExecuteReader();

            if (dr.Read())
                return PreencherModelo(dr);

            return null;
        }

        #endregion

        #region CARREGAR POR CÓDIGO

        public ModeloFornecerDE? CarregarPorCodigo(string codigo)
        {
            using SqlConnection conn = new(connectionString);

            string sql =
                @"SELECT *
                  FROM Fornecer_DE
                  WHERE CODIGO=@CODIGO";

            using SqlCommand cmd = new(sql, conn);

            cmd.Parameters.AddWithValue("@CODIGO", codigo);

            conn.Open();

            using SqlDataReader dr = cmd.ExecuteReader();

            if (dr.Read())
                return PreencherModelo(dr);

            return null;
        }

        #endregion

        #region LISTAR

        public List<ModeloFornecerDE> Listar(
            string? codigo = null,
            string? codFornecedor = null,
            string? codItem = null)
        {
            List<ModeloFornecerDE> lista = [];

            using SqlConnection conn = new(connectionString);

            string sql =
                @"SELECT *
                  FROM Fornecer_DE
                  WHERE 1=1";

            using SqlCommand cmd = new();

            if (!string.IsNullOrWhiteSpace(codigo))
            {
                sql += " AND CODIGO LIKE @CODIGO";
                cmd.Parameters.AddWithValue("@CODIGO",
                    "%" + codigo + "%");
            }

            if (!string.IsNullOrWhiteSpace(codFornecedor))
            {
                sql += " AND COD_FOR LIKE @COD_FOR";
                cmd.Parameters.AddWithValue("@COD_FOR",
                    "%" + codFornecedor + "%");
            }

            if (!string.IsNullOrWhiteSpace(codItem))
            {
                sql += " AND COD_ITEM LIKE @COD_ITEM";
                cmd.Parameters.AddWithValue("@COD_ITEM",
                    "%" + codItem + "%");
            }

            sql += " ORDER BY ID_FORNECER_DE DESC";

            cmd.Connection = conn;
            cmd.CommandText = sql;

            conn.Open();

            using SqlDataReader dr = cmd.ExecuteReader();

            while (dr.Read())
            {
                lista.Add(
                    PreencherModelo(dr));
            }

            return lista;
        }

        #endregion

        #region PREENCHER MODELO

        private ModeloFornecerDE PreencherModelo(SqlDataReader dr)
        {
            return new ModeloFornecerDE
            {
                ID_FORNECER_DE = Convert.ToInt32(dr["ID_FORNECER_DE"]),
                CODIGO = Convert.ToString(dr["CODIGO"]) ?? "",
                COD_FOR = Convert.ToString(dr["COD_FOR"]) ?? "",
                COD_ITEM = Convert.ToString(dr["COD_ITEM"]) ?? "",
                ULTIMA = Convert.ToString(dr["ULTIMA"]) ?? ""
            };
        }

        #endregion

        #region PREENCHER PARÂMETROS

        private void PreencherParametros(
            SqlCommand cmd,
            ModeloFornecerDE modelo)
        {
            cmd.Parameters.AddWithValue("@COD_FOR", modelo.COD_FOR);
            cmd.Parameters.AddWithValue("@COD_ITEM", modelo.COD_ITEM);
            cmd.Parameters.AddWithValue("@ULTIMA", modelo.ULTIMA);
        }

        #endregion
    }
}