LevelOS-Core/DAL/DALEsquemas.cs

using Microsoft.Data.SqlClient;
using MLL;
using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace DAL
{
    public class DALEsquemas
    {
        private readonly string connectionString;
        public DALEsquemas(string connectionString)
        {
            this.connectionString = connectionString;
        }
        public bool Inserir(ModeloEsquemas modelo)
        {
            using SqlConnection conn = new(connectionString);

            string sql = @"
    INSERT INTO Esquemas
    (
        MARCA,
        NOME,
        LOCAL,
        FPATH,
        OBS
    )
    VALUES
    (
        @MARCA,
        @NOME,
        @LOCAL,
        @FPATH,
        @OBS
    )";

            using SqlCommand cmd = new(sql, conn);

            PreencherParametros(cmd, modelo);

            conn.Open();

            return cmd.ExecuteNonQuery() > 0;
        }
        public bool Alterar(ModeloEsquemas modelo)
        {
            using SqlConnection conn = new(connectionString);

            string sql = @"
    UPDATE Esquemas
    SET
        MARCA=@MARCA,
        NOME=@NOME,
        LOCAL=@LOCAL,
        FPATH=@FPATH,
        OBS=@OBS
    WHERE
        ID_ESQUEMAS=@ID_ESQUEMAS";

            using SqlCommand cmd = new(sql, conn);

            PreencherParametros(cmd, modelo);

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

            conn.Open();

            return cmd.ExecuteNonQuery() > 0;
        }
        public bool Excluir(int id)
        {
            using SqlConnection conn = new(connectionString);

            string sql =
                @"DELETE FROM Esquemas
          WHERE ID_ESQUEMAS=@ID";

            using SqlCommand cmd = new(sql, conn);

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

            conn.Open();

            return cmd.ExecuteNonQuery() > 0;
        }
        public ModeloEsquemas? Carregar(int id)
        {
            using SqlConnection conn = new(connectionString);

            string sql = @"
    SELECT *
    FROM Esquemas
    WHERE ID_ESQUEMAS=@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;
        }
        public List<ModeloEsquemas> Listar(string? codigo = null,string? marca = null,string? nome = null, string? local = null,string? fpath = null)
        {
            List<ModeloEsquemas> lista = [];

            using SqlConnection conn = new(connectionString);

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

            using SqlCommand cmd = new();

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

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

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

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

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

            sql += " ORDER BY ID_ESQUEMAS DESC";

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

            conn.Open();

            using SqlDataReader dr = cmd.ExecuteReader();

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

            return lista;
        }
        private ModeloEsquemas PreencherModelo(SqlDataReader dr)
        {
            return new ModeloEsquemas
            {
                ID_ESQUEMAS = Convert.ToInt32(dr["ID_ESQUEMAS"]),
                CODIGO = Convert.ToString(dr["CODIGO"]) ?? "",
                MARCA = Convert.ToString(dr["MARCA"]) ?? "",
                NOME = Convert.ToString(dr["NOME"]) ?? "",
                LOCAL = Convert.ToString(dr["LOCAL"]) ?? "",
                FPATH = Convert.ToString(dr["FPATH"]) ?? "",
                OBS = Convert.ToString(dr["OBS"]) ?? ""
            };
        }
        private void PreencherParametros(SqlCommand cmd, ModeloEsquemas modelo)
        {
            cmd.Parameters.AddWithValue("@MARCA", modelo.MARCA);
            cmd.Parameters.AddWithValue("@NOME", modelo.NOME);
            cmd.Parameters.AddWithValue("@LOCAL", modelo.LOCAL);
            cmd.Parameters.AddWithValue("@FPATH", modelo.FPATH);
            cmd.Parameters.AddWithValue("@OBS", modelo.OBS);
        }

        #region Listagem
        public List<ModeloEsquemas> ListarPorMarca(string marca)
        {
            return Listar(marca: marca);
        }
        public List<ModeloEsquemas> ListarPorNome(string nome)
        {
            return Listar(nome: nome);
        }
        public List<ModeloEsquemas> ListarPorLocal(string local)
        {
            return Listar(local: local);
        }
        public ModeloEsquemas? CarregarPorCodigo(string codigo)
        {
            using SqlConnection conn = new(connectionString);

            string sql = @"
    SELECT *
    FROM Esquemas
    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;
        }
        public bool ExisteNome(string nome)
        {
            using SqlConnection conn = new(connectionString);

            string sql = @"
    SELECT COUNT(*)
    FROM Esquemas
    WHERE NOME=@NOME";

            using SqlCommand cmd = new(sql, conn);

            cmd.Parameters.AddWithValue("@NOME", nome);

            conn.Open();

            return Convert.ToInt32(
                cmd.ExecuteScalar()) > 0;
        }
        public bool ExisteArquivo(string fpath)
        {
            using SqlConnection conn = new(connectionString);

            string sql = @"
    SELECT COUNT(*)
    FROM Esquemas
    WHERE FPATH=@FPATH";

            using SqlCommand cmd = new(sql, conn);

            cmd.Parameters.AddWithValue("@FPATH", fpath);

            conn.Open();

            return Convert.ToInt32(
                cmd.ExecuteScalar()) > 0;
        }
        public int QuantidadePorMarca(string marca)
        {
            using SqlConnection conn = new(connectionString);

            string sql = @"
    SELECT COUNT(*)
    FROM Esquemas
    WHERE MARCA=@MARCA";

            using SqlCommand cmd = new(sql, conn);

            cmd.Parameters.AddWithValue("@MARCA", marca);

            conn.Open();

            return Convert.ToInt32(
                cmd.ExecuteScalar());
        }
        public int QuantidadeTotal()
        {
            using SqlConnection conn = new(connectionString);

            string sql =
                @"SELECT COUNT(*)
          FROM Esquemas";

            using SqlCommand cmd = new(sql, conn);

            conn.Open();

            return Convert.ToInt32(
                cmd.ExecuteScalar());
        }
        public DataTable Dashboard()
        {
            using SqlConnection conn = new(connectionString);

            string sql = @"
    SELECT
        COUNT(*) TOTAL_ESQUEMAS,
        COUNT(DISTINCT MARCA) TOTAL_MARCAS
    FROM Esquemas";

            using SqlDataAdapter da = new(sql, conn);

            DataTable dt = new();

            da.Fill(dt);

            return dt;
        }
        public List<string> ListarMarcas()
        {
            List<string> lista = [];

            using SqlConnection conn = new(connectionString);

            string sql = @"
    SELECT DISTINCT MARCA
    FROM Esquemas
    ORDER BY MARCA";

            using SqlCommand cmd = new(sql, conn);

            conn.Open();

            using SqlDataReader dr = cmd.ExecuteReader();

            while (dr.Read())
            {
                lista.Add(
                    Convert.ToString(dr["MARCA"]) ?? "");
            }

            return lista;
        }
        #endregion

    }
}