unit uBizComisiones;

interface

uses
  uDAInterfaces, uDADataTable, schComisionesClient_Intf, Classes,
  DBGrids, uDBSelectionList, DB, uExceptions, Controls;

const

  BIZ_SELECCION = 'Client.Field.Seleccion';
  BIZ_COBROSCOMISION = 'BizCobrosComision';
  BIZ_VENDEDORESCOMISION = 'BizVendedoresComision';  

type

  IBizSeleccion = interface(IDAStronglyTypedDataTable)
  ['{E4CB36C8-4A41-4DDB-92DB-211517EB60DB}']
  end;

  IBizVendedoresComision = interface(IVendedoresComision)
  ['{4095FB35-E5FE-4C04-929A-480C29FC9436}']
    procedure calcularComisiones(Total: Double);
  end;

  IBizCobrosComision = interface(ICobrosComision)
  ['{1CC63E18-6230-4421-96E8-26C011993F5C}']

    function getVendedoresComision: IBizVendedoresComision;
    procedure setVendedoresComision(const Value: IBizVendedoresComision);
    property VendedoresComision: IBizVendedoresComision read getVendedoresComision
    write setVendedoresComision;

    function getTotal: Double;
    procedure setTotal(const Value: Double);
    property Total: Double read getTotal write setTotal;

    function GetOnTotalChanged : TNotifyEvent;
    procedure SetOnTotalChanged (const Value : TNotifyEvent);
    property OnTotalChanged : TNotifyEvent read GetOnTotalChanged
      write SetOnTotalChanged;
  end;


  TBizSeleccionFieldRules = class(TDAFieldRules)
  protected
    procedure OnChange(Sender: TDACustomField); override;
  end;

  TBizCobrosComisionDataTableRules = class(TCobrosComisionDataTableRules, IBizCobrosComision)
  private
    FVendedoresComision: IBizVendedoresComision;
    FTotal: Double;
    FOnTotalChanged : TNotifyEvent;
    function getTotal: Double;
    procedure setTotal(const Value: Double);
    function GetOnTotalChanged: TNotifyEvent;
    procedure SetOnTotalChanged(const Value: TNotifyEvent);
    function getVendedoresComision: IBizVendedoresComision;
    procedure setVendedoresComision(const Value: IBizVendedoresComision);
  protected
    procedure AfterOpen(Sender: TDADataTable); override;
  public
    property VendedoresComision: IBizVendedoresComision read getVendedoresComision
    write setVendedoresComision;
    property Total: Double read getTotal write setTotal;
    property OnTotalChanged : TNotifyEvent read GetOnTotalChanged
      write SetOnTotalChanged;

    constructor Create(aDataTable: TDADataTable); override;
    destructor Destroy; override;
  end;

  TBizVendedoresComisionDataTableRules = class(TVendedoresComisionDataTableRules, IBizVendedoresComision)
  public
    procedure calcularComisiones(Total: Double);
  end;

implementation

uses
  Windows, Dialogs, uDACDSDataTable, SysUtils, uDataModuleBase,
  uEditorUtils, uDataModuleComisiones, Variants;


{ TBizCobrosComisionDataTableRules }

{
************************** TBizCobrosComisionDataTableRules **************************
}

procedure TBizCobrosComisionDataTableRules.AfterOpen(Sender: TDADataTable);
var
  ldTotal : Double;
begin
  inherited;

  with (Sender as IBizCobrosComision) do
  begin
    DataTable.DisableControls;
    ldTotal := 0;
    First;
    while not DataTable.Eof do
    begin
      ldTotal := ldTotal + IMPORTE;
      Next;
    end;
    First;
    Total := ldTotal;
    DataTable.EnableControls;
  end;
end;

constructor TBizCobrosComisionDataTableRules.Create(aDataTable: TDADataTable);
begin
  inherited;
  FVendedoresComision := Nil;
  aDataTable.AfterOpen := AfterOpen;
end;

destructor TBizCobrosComisionDataTableRules.Destroy;
begin
  FVendedoresComision := Nil;
  inherited;
end;

function TBizCobrosComisionDataTableRules.GetOnTotalChanged: TNotifyEvent;
begin
  Result := FOnTotalChanged;
end;

function TBizCobrosComisionDataTableRules.getTotal: Double;
begin
  Result := FTotal;
end;

function TBizCobrosComisionDataTableRules.getVendedoresComision: IBizVendedoresComision;
begin
  Result := FVendedoresComision;
end;

procedure TBizCobrosComisionDataTableRules.SetOnTotalChanged(const Value: TNotifyEvent);
begin
  FOnTotalChanged := Value;
end;

procedure TBizCobrosComisionDataTableRules.setTotal(const Value: Double);
begin
  FTotal := Value;

  if Assigned(FOnTotalChanged) then
     FOnTotalChanged(Self);

  FVendedoresComision.CalcularComisiones(FTotal);   
end;

{ TBizSeleccionFieldRules }

procedure TBizSeleccionFieldRules.OnChange(Sender: TDACustomField);
var
  ACobrosComision : IBizCobrosComision;
begin
  if Supports(DataTable, IBizCobrosComision, ACobrosComision) then
  begin
    if ACobrosComision.SELECCION = 1
    then ACobrosComision.Total := ACobrosComision.Total + ACobrosComision.IMPORTE
    else ACobrosComision.Total := ACobrosComision.Total - ACobrosComision.IMPORTE;
  end;
end;

procedure TBizCobrosComisionDataTableRules.setVendedoresComision(const Value: IBizVendedoresComision);
begin
  if Assigned(FVendedoresComision) then
     FVendedoresComision := Nil;

  FVendedoresComision := Value;
end;

{ TBizVendedoresComisionDataTableRules }

procedure TBizVendedoresComisionDataTableRules.calcularComisiones(Total: Double);
begin
  with (Self as IBizVendedoresComision) do
  begin
    DataTable.DisableControls;
    First;
    while not DataTable.Eof do
    begin
      Edit;
      COMISION := (Total * PORCENTAJE) / 100;
      Post;
      Next;
    end;
    First;
    DataTable.EnableControls;
  end;
end;

initialization
  RegisterFieldRules(BIZ_SELECCION, TBizSeleccionFieldRules);
  RegisterDataTableRules(BIZ_CobrosCOMISION, TBizCobrosComisionDataTableRules);
  RegisterDataTableRules(BIZ_VENDEDORESCOMISION, TBizVendedoresComisionDataTableRules);

finalization

end.