unit uBizArticulos;

interface

uses
  uDAInterfaces, uDADataTable, schArticulosClient_Intf, uDBSelectionListUtils;

const
  BIZ_CLIENT_ARTICULO = 'Client.Articulo';

type
  IBizArticulo = interface(IArticulos)
  ['{06AB61B1-C225-4791-9F5E-00A60DBA7FFD}']
  	function EsNuevo : Boolean;
    function GetSelectedRecords: ISelectedRecords;
    property SelectedRecords : ISelectedRecords read GetSelectedRecords;
    function HayImagen: Boolean;
    procedure SalvarImagen(const AFileName: String);
    procedure CargarImagen(const AFileName: String);
    procedure QuitarImagen;
  end;

  TBizArticulo = class(TArticulosDataTableRules, IBizArticulo, ISelectedRecords)
  protected
    FSelectedRecords : TSelectedRecords;
    function GetSelected: Boolean; virtual;
    procedure SetSelected(const Value: Boolean); virtual;

    procedure OnNewRecord(Sender: TDADataTable); override;
  public
    function HayImagen: Boolean;
    procedure SalvarImagen(const AFileName: String);
    procedure CargarIMagen(const AFileName: String);
    procedure QuitarImagen;    
    function EsNuevo : Boolean;
    function GetSelectedRecords: ISelectedRecords;
    constructor Create(aDataTable: TDADataTable); override;
    destructor Destroy; override;
    property SelectedRecords : ISelectedRecords read GetSelectedRecords implements ISelectedRecords;
    property Selected : Boolean read GetSelected write SetSelected;
  end;

implementation

uses
  uDataTableUtils, uDataModuleUsuarios, SysUtils, uROClasses, Classes;

{ TBizArticulo }

procedure TBizArticulo.CargarImagen(const AFileName: String);
var
  StdStream: TMemoryStream;
  StreamRO: IROStream;
begin
{ inherited;

  StdStream := TMemoryStream.Create;
  try
    StdStream.LoadFromFile(AFileName);
    StreamRO := NewROStream(StdStream,False);
    DataTable.Edit;
    DataTable.FieldByName(fld_ArticulosIMAGEN).LoadFromStream(StreamRO);
    DataTable.Post;
  finally
    StdStream.Free;
  end;}
end;

constructor TBizArticulo.Create(aDataTable: TDADataTable);
begin
  inherited;
  FSelectedRecords := TSelectedRecords.Create(aDataTable);
end;

destructor TBizArticulo.Destroy;
begin
  FreeAndNIL(FSelectedRecords);
  inherited;
end;

function TBizArticulo.EsNuevo: Boolean;
begin
  Result := (ID < 0);
end;

function TBizArticulo.GetSelected: Boolean;
begin
  Result := FSelectedRecords.CurrentRowSelected;
end;

function TBizArticulo.GetSelectedRecords: ISelectedRecords;
begin
  Result := FSelectedRecords;
end;

function TBizArticulo.HayImagen: Boolean;
begin
//  Result := DataTable.FieldByName(fld_ArticulosIMAGEN).IsNull
end;

procedure TBizArticulo.OnNewRecord(Sender: TDADataTable);
begin
  inherited;
  ID := GetRecNo; // -1, -2, -3...
  ID_EMPRESA := dmUsuarios.IDEmpresaActual;
  USUARIO := dmUsuarios.LoginInfo.Usuario;

end;

procedure TBizArticulo.QuitarImagen;
begin
{  DataTable.Edit;
  DataTable.FieldByName(fld_ArticulosIMAGEN).Clear;
  DataTable.Post;}
end;

procedure TBizArticulo.SalvarImagen(const AFileName: String);
begin
//  DataTable.FieldByName(fld_ArticulosIMAGEN).SaveToFile(AFileName);
end;

procedure TBizArticulo.SetSelected(const Value: Boolean);
begin
  FSelectedRecords.CurrentRowSelected := True;
end;

initialization
  RegisterDataTableRules(BIZ_CLIENT_ARTICULO, TBizArticulo);

finalization

end.