unit srvArticulos_Impl;

{----------------------------------------------------------------------------}
{ This unit was automatically generated by the RemObjects SDK after reading  }
{ the RODL file associated with this project .                               }
{                                                                            }
{ This is where you are supposed to code the implementation of your objects. }
{----------------------------------------------------------------------------}

interface

uses
  {vcl:} Classes, SysUtils,
  {RemObjects:} uROClientIntf, uROTypes, uROServer, uROServerIntf, uROSessions,
  {Ancestor Implementation:} DataAbstractService_Impl,
  {Used RODLs:} DataAbstract4_Intf,
  {Generated:}   uDABusinessProcessor, uDABin2DataStreamer, uDADataStreamer,
  uDAScriptingProvider, uDAClasses,
  FactuGES_Intf, uDAInterfaces;

type
  { TsrvArticulos }
  TsrvArticulos = class(TDataAbstractService, IsrvArticulos)
    Diagrams: TDADiagrams;
    bpArticulos: TDABusinessProcessor;
    Bin2DataStreamer: TDABin2DataStreamer;
    schArticulos: TDASchema;
    DataDictionary: TDADataDictionary;
    procedure DARemoteServiceBeforeGetDatasetData(const Dataset: IDADataset;
      const IncludeSchema: Boolean; const MaxRecords: Integer);
    procedure DARemoteServiceCreate(Sender: TObject);
    procedure DataAbstractServiceBeforeAcquireConnection(aSender: TObject;
      var aConnectionName: string);
    function EliminarImagen(const ID_ARTICULO: Integer): Boolean;
    function AnadirImagen(const ID_ARTICULO: Integer; const Imagen: Binary): Boolean;
  end;

implementation

{$R *.dfm}
uses
  {Generated:} FactuGES_Invk, uDataModuleServer, uROClasses, uSistemaFunc,
  uDatabaseUtils, schArticulosClient_Intf, uRestriccionesUsuarioUtils;

procedure Create_srvArticulos(out anInstance : IUnknown);
begin
  anInstance := TsrvArticulos.Create(NIL);
end;

{ srvArticulos }
function TsrvArticulos.AnadirImagen(const ID_ARTICULO: Integer; const Imagen: Binary): Boolean;
var
  AConn : IDAConnection;
  dsData: IDADataset;
  dsCommand: IDASQLCommand;
  aAux : String;

begin
  Result := False;
  AConn := dmServer.ConnectionManager.NewConnection(dmServer.ConnectionManager.GetDefaultConnectionName);

  try
    try
      dsData := schArticulos.NewDataset(AConn, 'ExisteImagen', ['ID'], [ID_ARTICULO]);
      dsData.Active := True;
      Result := (dsData.FieldValues[0] > 0);
      AConn.CommitTransaction;
    except
      RaiseError('Error al buscar articulo con imagen');
      AConn.RollbackTransaction;
    end;
  finally
    dsData := NIL;
  end;

  if Result then
  begin
    try
      try
        aAux := DarFicheroJPGTemporal;
        Imagen.SaveToFile(aAux);
        dsCommand := schArticulos.NewCommand(AConn, 'ModificarImagen');
        dsCommand.ParamByName('ID').AsInteger := ID_ARTICULO;
        dsCommand.ParamByName('IMAGEN').LoadFromFile(aAux);
        dsCommand.Execute;
        AConn.CommitTransaction;
        Result := True;
      except
        RaiseError('Error al modificar la imagen');
        AConn.RollbackTransaction;
      end;
    finally
      DeleteFile(aAux);    
      dsCommand := NIL;
    end;
  end;
end;

procedure TsrvArticulos.DARemoteServiceBeforeGetDatasetData(
  const Dataset: IDADataset; const IncludeSchema: Boolean;
  const MaxRecords: Integer);
begin
  if DataSet.Name = nme_Articulos then
  begin
    { Aquí se asegura que el usuario sólo accede a los Articulos
      de las empresas a las que tiene permiso para acceder
      filtrando DataSet por ID_EMPRESA. }
    FiltrarAccesoUsuario(Session, Connection, schArticulos, DataSet, fld_ArticulosID_EMPRESA);
  end;
end;

procedure TsrvArticulos.DARemoteServiceCreate(Sender: TObject);
begin
 //SessionManager := dmServer.SessionManager;
end;

procedure TsrvArticulos.DataAbstractServiceBeforeAcquireConnection(
  aSender: TObject; var aConnectionName: string);
begin
  ConnectionName := dmServer.ConnectionName;
end;

function TsrvArticulos.EliminarImagen(const ID_ARTICULO: Integer): Boolean;
var
  AConn : IDAConnection;
  dsCommand: IDASQLCommand;

begin
  Result := False;
  AConn := dmServer.ConnectionManager.NewConnection(dmServer.ConnectionManager.GetDefaultConnectionName);

  try
    try
      dsCommand := schArticulos.NewCommand(AConn, 'EliminarImagen');
      with dsCommand do
           ParamByName('ID').AsInteger := ID_ARTICULO;
      dsCommand.Execute;
      AConn.CommitTransaction;
      Result := True;
    except
      RaiseError('Error al eliminar la imagen');
      AConn.RollbackTransaction;
    end;
  finally
    dsCommand := NIL;
  end;
end;

initialization
  TROClassFactory.Create('srvArticulos', Create_srvArticulos, TsrvArticulos_Invoker);

finalization

end.