unit uRptComisiones_Server;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, frxClass, frxDBSet, uDAScriptingProvider,
  uDADataTable, uDACDSDataTable, DB, uDAClasses, frxChart, frxGradient,
  frxChBox, frxCross, frxOLE, frxBarcode, frxRich, uDABINAdapter, uROTypes,
  uDAInterfaces, uDADataStreamer, uDABin2DataStreamer;

type
  TRptComisiones = class(TDataModule)
    DADataCabecera: TDADataSource;
    tbl_Comisiones: TDACDSDataTable;
    frxRichObject1: TfrxRichObject;
    frxBarCodeObject1: TfrxBarCodeObject;
    frxOLEObject1: TfrxOLEObject;
    frxCrossObject1: TfrxCrossObject;
    frxCheckBoxObject1: TfrxCheckBoxObject;
    frxGradientObject1: TfrxGradientObject;
    frxChartObject1: TfrxChartObject;
    frxDBCabecera: TfrxDBDataset;
    frxReport: TfrxReport;
    Bin2DataStreamer: TDABin2DataStreamer;
    schReport: TDASchema;
    DataDictionary: TDADataDictionary;
    procedure DataModuleCreate(Sender: TObject);
  private
    FConnection: IDAConnection;
  public
    function GenerarComision(const AComisionID : Variant; const DesglosadoProv: Boolean; FechaIni: String; FechaFin: String; AAgenteID: Variant): Binary;
  end;

implementation

{$R *.dfm}

uses
  uSistemaFunc, uDataModuleServer, schComisionesClient_Intf;

const
  rptComision = 'InfComisiones.fr3';
  rptComisionDesglosado = 'InfComisionesDesglosado.fr3';

  { Dataset names for schReport }
  ds_InformeComisiones = 'InformeComisiones';
  ds_InformeComisionesDesglosado = 'InformeComisionesDesglosado';


{ TRptComision }

procedure TRptComisiones.DataModuleCreate(Sender: TObject);
begin
  schReport.ConnectionManager := dmServer.ConnectionManager;
  FConnection := dmServer.DarNuevaConexion;
  frxReport.EngineOptions.NewSilentMode := simReThrow;
end;

function TRptComisiones.GenerarComision(const AComisionID : Variant; const DesglosadoProv: Boolean; FechaIni: String; FechaFin: String; AAgenteID: Variant): Binary;
var
  dsMaster: IDADataset;
  AStream: TMemoryStream;
  AInforme: Variant;
  Condicion: TDAWhereExpression;
  
begin
  AStream := TMemoryStream.Create;
  Result := Binary.Create;
  FConnection.BeginTransaction;
  try
    if DesglosadoProv then
       dsMaster := schReport.NewDataset(FConnection, ds_InformeComisionesDesglosado,[], [], False)
    else
       dsMaster := schReport.NewDataset(FConnection, ds_InformeComisiones,[], [], False);

  // Filtrar las facturas actuales por empresa
    with dsMaster.DynamicWhere do
    begin
      if not VarIsNull(AComisionID) then
      begin
        Condicion := NewBinaryExpression(NewField('', fld_Facturas_ComisionID_COMISION_LIQUIDADA), NewConstant(VarToStr(AComisionID), datString), dboEqual);
        if IsEmpty then
           Expression := Condicion
        else
           Expression := NewBinaryExpression(Expression, Condicion, dboAnd);
      end;

      if not VarIsNull(AAgenteID) then
      begin
        Condicion := NewBinaryExpression(NewField('', fld_Facturas_ComisionID_AGENTE), NewConstant(VarToStr(AAgenteID), datString), dboEqual);
        if IsEmpty then
           Expression := Condicion
        else
           Expression := NewBinaryExpression(Expression, Condicion, dboAnd);
      end;

      if (Length(FechaIni) > 0)
      and (Length(FechaFin) > 0) then
      begin
        // (FECHA_INICIO between FECHA_FIN)
        Condicion := NewBinaryExpression(NewField('', fld_Facturas_ComisionFecha), NewConstant(FechaIni, datString), dboGreaterOrEqual);
        Condicion := NewBinaryExpression(NewBinaryExpression(NewField('', fld_Facturas_ComisionFecha), NewConstant(FechaFin, datString), dboLessOrEqual), Condicion, dboAnd);

        if IsEmpty then
           Expression := Condicion
        else
           Expression := NewBinaryExpression(Expression, Condicion, dboAnd);
      end;
    end;

    dsMaster.Open;

    AStream.Clear;
    Bin2DataStreamer.WriteDataset(AStream, dsMaster, [woRows, woSchema], -1);
    Bin2DataStreamer.ReadDataset(AStream, tbl_Comisiones, TRUE, '', TRUE, TRUE);

    if DesglosadoProv then
    begin
      AInforme := DarRutaFichero(DarRutaInformes, rptComisionDesglosado, tbl_Comisiones.FieldByName('ID_EMPRESA').AsString);
      if VarIsNull(AInforme) then
         raise Exception.Create (('Error Servidor: _GenerarComision, no encuentra informe ' + rptComisionDesglosado));

      frxReport.LoadFromFile(AInforme, True);
    end
    else
    begin
      AInforme := DarRutaFichero(DarRutaInformes, rptComision, tbl_Comisiones.FieldByName('ID_EMPRESA').AsString);
      if VarIsNull(AInforme) then
         raise Exception.Create (('Error Servidor: _GenerarComision, no encuentra informe ' + rptComision));

      frxReport.LoadFromFile(AInforme, True);
    end;

    frxReport.Variables['FechaIni'] := QuotedStr(FechaIni);
    frxReport.Variables['FechaFin'] := QuotedStr(FechaFin);
    frxReport.PrepareReport;
    frxReport.PreviewPages.SaveToStream(Result);
  finally
    AStream.Free;
    dsMaster := Nil;
    FConnection.RollbackTransaction;
  end;
end;

end.