unit uBizAlmacenes;

interface

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

type

  IBizAlmacen = interface(IALMACENES)
    ['{D9479C4B-52EA-4DB6-9F8F-4B8B758EF80A}']
    procedure Show;
    procedure ShowAll;
    procedure Preview;
    function ShowForSelect : TModalResult;
  end;

  TBizAlmacenDataTableRules = class(TALMACENESDataTableRules, IBizAlmacen,
    IApplyUpdateFailedException, ISelectedRowList)
  private
    FSelectedRows : TSelectedRowList;
    procedure ShowToSelect;
    procedure BeforeApplyUpdates(Sender: TDADataTable; const Delta: IDADelta);
    procedure OnPostError(DataTable: TDADataTable; Error: EDatabaseError;
      var Action: TDataAction); override;
  protected
    procedure OnNewRecord(Sender: TDADataTable); override;
    function GetSelectedRows : TSelectedRowList; virtual;
    procedure ShowApplyUpdateFailed (const Error: EDAApplyUpdateFailed); virtual;
    procedure BeforeDelete(Sender: TDADataTable); override;
  public
    constructor Create(aDataTable: TDADataTable); override;
    destructor Destroy; override;
    procedure Show; virtual;
    procedure ShowAll; virtual;
    procedure Preview; virtual;
    function ShowForSelect : TModalResult; virtual;
    property SelectedRows : TSelectedRowList read GetSelectedRows;
  end;

  procedure ValidarAlmacen (const AAlmacen : IBizAlmacen);

implementation

uses
  Windows, Dialogs, uDACDSDataTable, SysUtils, uDataModuleBase, uDataModuleUsuarios,
  uEditorUtils, uDataModuleAlmacenes, Variants;


procedure ValidarAlmacen (const AAlmacen : IBizAlmacen);
begin
//
end;


{ TBizAlmacenDataTableRules }

{
************************** TBizAlmacenDataTableRules **************************
}

procedure TBizAlmacenDataTableRules.OnNewRecord(Sender: TDADataTable);
begin
  inherited;
  CODIGOEMPRESA := dmBase.CodigoEmpresa;
  USUARIO := dmUsuarios.LoginInfo.UserID;
  FECHAALTA := Date;
end;

procedure TBizAlmacenDataTableRules.Show;
begin
  ShowEditor(IBizAlmacen, Self, etItem);
end;

procedure TBizAlmacenDataTableRules.Preview;
begin
//  dmContactos.Preview;
end;

procedure TBizAlmacenDataTableRules.ShowApplyUpdateFailed(
  const Error: EDAApplyUpdateFailed);
begin
  if (Pos(AUF_FKVIOLATION, Error.Message) > 0) then
    MessageBox(0, 'No se puede borrar este almacén porque tiene articulos o está asociado al destino de algún pedido', 'Atención', MB_ICONWARNING or MB_OK);
end;

function TBizAlmacenDataTableRules.GetSelectedRows: TSelectedRowList;
begin
  Result := FSelectedRows;
end;

procedure TBizAlmacenDataTableRules.ShowToSelect;
begin
//
end;

constructor TBizAlmacenDataTableRules.Create(aDataTable: TDADataTable);
begin
  inherited;
  FSelectedRows := TSelectedRowList.Create(aDataTable);
  aDataTable.OnBeforeApplyUpdates := BeforeApplyUpdates;  
end;

destructor TBizAlmacenDataTableRules.Destroy;
begin
  FSelectedRows.Free;
  inherited;
end;

procedure TBizAlmacenDataTableRules.ShowAll;
begin
//  ShowEditor(IBizProveedor, Self, etItems);
end;

function TBizAlmacenDataTableRules.ShowForSelect: TModalResult;
begin
  Result := ShowEditor(IBizAlmacen, Self, etItems);
end;

procedure TBizAlmacenDataTableRules.BeforeApplyUpdates(
  Sender: TDADataTable; const Delta: IDADelta);
var
  i: Integer;  
begin
  for i := 0 to Delta.Count - 1 do
    case Delta.Changes[i].ChangeType of
      ctInsert, ctUpdate : ValidarAlmacen(Self);
//      ctDelete :
    end;
end;

procedure TBizAlmacenDataTableRules.OnPostError(DataTable: TDADataTable;
  Error: EDatabaseError; var Action: TDataAction);
begin
  inherited;
  Action := daAbort;
  if (Pos(AUF_HAVEVALUE, Error.Message) > 0) then
  begin
    if (Pos('Nombre', Error.Message) > 0) then
      MessageBox(0, 'Debe indicar al menos el nombre', 'Atención', MB_ICONWARNING or MB_OK)
    else
      raise Error;
  end
  else
    raise Error;
end;

procedure TBizAlmacenDataTableRules.BeforeDelete(Sender: TDADataTable);
begin
  inherited;
  if not dmAlmacenes.PuedoEliminarAlmacen(CODIGO) then
     raise Exception.Create('No se puede borrar este almacén porque tiene articulos o está asociado al destino de algún pedido');
end;

initialization
  RegisterDataTableRules('BizAlmacen', TBizAlmacenDataTableRules);

finalization

end.